/* ============ Tema ============ */
:root, [data-theme="light"] {
  --bg: #f5f6fb; --surface: #ffffff; --surface-2: #eef0f7; --text: #1b1d2a; --muted: #6b7088;
  --border: #dfe2ee; --accent: #4f46e5; --accent-2: #7c73ff; --accent-contrast: #fff;
  --good: #16a34a; --bad: #dc2626; --warn: #d97706; --info: #0284c7;
  --shadow: 0 1px 2px rgba(20,20,50,.06), 0 6px 24px rgba(20,20,50,.07);
  --card-bg: #ffffff; --radius: 16px;
  --lv-new: var(--info); --lv-learn: var(--bad); --lv-young: var(--warn); --lv-mature: var(--good);
  color-scheme: light;
}
[data-theme="dark"] {
  --bg: #0f1117; --surface: #181b24; --surface-2: #222634; --text: #e8eaf2; --muted: #9298ad;
  --border: #2c3142; --accent: #8b85ff; --accent-2: #a9a4ff; --accent-contrast: #0f1117;
  --good: #34d399; --bad: #f87171; --warn: #fbbf24; --info: #38bdf8;
  --shadow: 0 1px 2px rgba(0,0,0,.3), 0 8px 30px rgba(0,0,0,.35); --card-bg: #1c2030;
  color-scheme: dark;
}
[data-theme="sepia"] {
  --bg: #f4ecd8; --surface: #fbf6e9; --surface-2: #efe4c8; --text: #3e2f1c; --muted: #7d6a50;
  --border: #e0d2b0; --accent: #a0522d; --accent-2: #c4703f; --accent-contrast: #fff;
  --card-bg: #fffaf0; color-scheme: light;
}
[data-theme="ocean"] {
  --bg: #e8f4f8; --surface: #ffffff; --surface-2: #d8edf4; --text: #0b2a3a; --muted: #4f6e7d;
  --border: #c5e1eb; --accent: #0891b2; --accent-2: #22b8d8; --accent-contrast: #fff;
  --card-bg: #ffffff; color-scheme: light;
}
[data-theme="forest"] {
  --bg: #eef4ec; --surface: #ffffff; --surface-2: #e0ecdc; --text: #1c2b1a; --muted: #5d725a;
  --border: #cfe0ca; --accent: #2f7d32; --accent-2: #4caf50; --accent-contrast: #fff;
  --card-bg: #ffffff; color-scheme: light;
}
[data-theme="sakura"] {
  --bg: #fdf0f4; --surface: #ffffff; --surface-2: #fbe1ea; --text: #3a1a26; --muted: #8a5d6e;
  --border: #f5cddb; --accent: #db2777; --accent-2: #f472b6; --accent-contrast: #fff;
  --card-bg: #ffffff; color-scheme: light;
}
[data-theme="midnight"] {
  --bg: #0a0e1f; --surface: #121833; --surface-2: #1b2347; --text: #e6e9ff; --muted: #8d95c4;
  --border: #252e5a; --accent: #f5b942; --accent-2: #ffd27a; --accent-contrast: #0a0e1f;
  --good: #4ade80; --bad: #fb7185; --warn: #fbbf24; --info: #60a5fa;
  --shadow: 0 1px 2px rgba(0,0,0,.4), 0 10px 30px rgba(0,0,0,.45); --card-bg: #161d3d;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background: var(--bg); color: var(--text);
  font: 15px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans", "Noto Sans JP", sans-serif;
  min-height: 100vh; -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; }
img { max-width: 100%; }
h1, h2, h3 { line-height: 1.25; margin: 0 0 .5em; }
h1 { font-size: 1.6rem; } h2 { font-size: 1.25rem; } h3 { font-size: 1.05rem; }
.muted { color: var(--muted); }
.small { font-size: .85rem; }
.hidden { display: none !important; }

/* ============ Topbar ============ */
.topbar {
  position: sticky; top: 0; z-index: 20; display: flex; align-items: center; justify-content: space-between;
  gap: 12px; padding: 10px 20px; background: color-mix(in srgb, var(--surface) 88%, transparent);
  backdrop-filter: blur(10px); border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: center; gap: 8px; font-weight: 700; color: var(--text); font-size: 1.05rem; }
.mainnav { display: flex; gap: 4px; }
.mainnav a { padding: 7px 12px; border-radius: 10px; color: var(--muted); font-weight: 500; white-space: nowrap; }
.mainnav a:hover { background: var(--surface-2); color: var(--text); }
.mainnav a.active { background: var(--surface-2); color: var(--accent); }

#view { max-width: 1080px; margin: 0 auto; padding: 24px 20px 100px; outline: none; }


/* ============ Komponen dasar ============ */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 9px 16px; border-radius: 11px; border: 1px solid var(--border); background: var(--surface);
  color: var(--text); font: inherit; font-weight: 600; cursor: pointer; transition: transform .08s, background .15s, border-color .15s;
  text-decoration: none; white-space: nowrap;
}
.btn:hover { background: var(--surface-2); }
.btn:active { transform: scale(.97); }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-contrast); }
.btn.primary:hover { filter: brightness(1.08); }
.btn.danger { color: var(--bad); }
.btn.danger.solid { background: var(--bad); color: #fff; border-color: var(--bad); }
.btn.ghost { background: transparent; border-color: transparent; }
.btn.ghost:hover { background: var(--surface-2); }
.btn.sm { padding: 6px 11px; font-size: .85rem; border-radius: 9px; }
.btn.lg { padding: 13px 22px; font-size: 1.05rem; border-radius: 14px; }
.btn.icon { padding: 7px 9px; }
.btn-row { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }

.panel { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow); }
.panel + .panel { margin-top: 16px; }
.section { margin-top: 28px; }
.section-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-bottom: 12px; flex-wrap: wrap; }
.section-head h2 { margin: 0; }

.grid { display: grid; gap: 14px; }
.grid.cols-2 { grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }
.grid.cols-3 { grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); }
.grid.cols-4 { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); }

label.field { display: flex; flex-direction: column; gap: 5px; font-weight: 600; font-size: .9rem; }
label.field .hint { font-weight: 400; color: var(--muted); font-size: .8rem; }
input[type=text], input[type=number], input[type=time], input[type=url], input[type=search], select, textarea {
  font: inherit; color: var(--text); background: var(--surface); border: 1px solid var(--border);
  border-radius: 10px; padding: 9px 12px; width: 100%; outline: none; transition: border-color .15s, box-shadow .15s;
}
textarea { resize: vertical; min-height: 80px; }
input:focus, select:focus, textarea:focus { border-color: var(--accent); box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 22%, transparent); }
input[type=color] { width: 44px; height: 36px; border: 1px solid var(--border); border-radius: 8px; padding: 2px; background: var(--surface); }
.form-grid { display: grid; gap: 14px; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); }
.switch { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 12px 0; border-bottom: 1px solid var(--border); }
.switch:last-child { border-bottom: 0; }
.switch .txt b { display: block; }
.switch .txt span { color: var(--muted); font-size: .85rem; }
.toggle { position: relative; width: 44px; height: 26px; flex: none; }
.toggle input { opacity: 0; width: 0; height: 0; }
.toggle span { position: absolute; inset: 0; background: var(--surface-2); border: 1px solid var(--border); border-radius: 999px; cursor: pointer; transition: .2s; }
.toggle span::after { content: ""; position: absolute; width: 20px; height: 20px; left: 2px; top: 2px; background: #fff; border-radius: 50%; transition: .2s; box-shadow: 0 1px 3px rgba(0,0,0,.25); }
.toggle input:checked + span { background: var(--accent); border-color: var(--accent); }
.toggle input:checked + span::after { transform: translateX(18px); }

.badge { display: inline-flex; align-items: center; gap: 4px; font-size: .75rem; font-weight: 700; padding: 2px 8px; border-radius: 999px; background: var(--surface-2); color: var(--muted); }
.badge.new { background: color-mix(in srgb, var(--info) 15%, transparent); color: var(--info); }
.badge.learn { background: color-mix(in srgb, var(--bad) 14%, transparent); color: var(--bad); }
.badge.due { background: color-mix(in srgb, var(--good) 15%, transparent); color: var(--good); }
.tag { display: inline-block; font-size: .72rem; padding: 1px 7px; border-radius: 6px; background: var(--surface-2); color: var(--muted); margin: 2px 2px 0 0; }

.tabs { display: flex; gap: 4px; background: var(--surface-2); padding: 4px; border-radius: 12px; width: fit-content; flex-wrap: wrap; }
.tabs button { border: 0; background: transparent; font: inherit; font-weight: 600; color: var(--muted); padding: 7px 14px; border-radius: 9px; cursor: pointer; }
.tabs button.active { background: var(--surface); color: var(--text); box-shadow: var(--shadow); }

.empty { text-align: center; padding: 40px 20px; color: var(--muted); }
.empty .big { font-size: 2.6rem; }

/* ============ Beranda ============ */
.hero { display: grid; grid-template-columns: 1fr auto; gap: 20px; align-items: center;
  background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: var(--accent-contrast);
  border-radius: 20px; padding: 24px; box-shadow: var(--shadow); }
.hero h1 { margin-bottom: 4px; }
.hero p { margin: 0; opacity: .9; }
.hero .btn { background: var(--accent-contrast); color: var(--accent); border-color: transparent; }
.hero-stats { display: flex; gap: 22px; margin-top: 14px; flex-wrap: wrap; }
.hero-stats div b { display: block; font-size: 1.4rem; }
.hero-stats div span { font-size: .8rem; opacity: .85; }
.ring { width: 110px; height: 110px; position: relative; }
.ring svg { transform: rotate(-90deg); }
.ring .lbl { position: absolute; inset: 0; display: grid; place-items: center; text-align: center; font-size: .75rem; line-height: 1.2; }
.ring .lbl b { font-size: 1.3rem; display: block; }
@media (max-width: 600px) { .hero { grid-template-columns: 1fr; } .ring { justify-self: start; } }

.deck-card { position: relative; display: flex; flex-direction: column; gap: 10px; padding: 18px; border-radius: var(--radius);
  background: var(--surface); border: 1px solid var(--border); box-shadow: var(--shadow); color: var(--text); transition: transform .15s, box-shadow .15s; overflow: hidden; }
.deck-card::before { content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 5px; background: var(--deck-color, var(--accent)); }
.deck-card:hover { transform: translateY(-2px); }
.deck-card .top { display: flex; gap: 12px; align-items: center; }
.ic { flex: none; display: block; }
.deck-emoji { font-weight: 800; color: var(--deck-color, var(--accent)); width: 44px; height: 44px; flex: none; border-radius: 12px; display: grid; place-items: center; font-size: 1.5rem;
  background: color-mix(in srgb, var(--deck-color, var(--accent)) 16%, transparent); }
.deck-card h3 { margin: 0; }
.deck-card .desc { color: var(--muted); font-size: .85rem; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; min-height: 1.2em; }
.deck-card .counts { display: flex; gap: 6px; flex-wrap: wrap; }
.mastery-bar { display: flex; height: 6px; border-radius: 999px; overflow: hidden; background: var(--surface-2); }
.mastery-bar span { display: block; height: 100%; }
.deck-card .actions { display: flex; gap: 6px; margin-top: auto; }
.deck-card.add { align-items: center; justify-content: center; border-style: dashed; color: var(--muted); min-height: 160px; cursor: pointer; box-shadow: none; background: transparent; }
.deck-card.add::before { display: none; }

/* ============ Deck detail ============ */
.deck-header { display: flex; gap: 16px; align-items: center; flex-wrap: wrap; }
.deck-header .deck-emoji { width: 60px; height: 60px; font-size: 2rem; border-radius: 16px; }
.deck-header .info { flex: 1; min-width: 200px; }
.mode-grid { display: grid; gap: 12px; grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); }
.mode { display: flex; flex-direction: column; gap: 4px; padding: 16px; border-radius: 14px; border: 1px solid var(--border); background: var(--surface);
  cursor: pointer; text-align: left; font: inherit; color: var(--text); transition: border-color .15s, transform .1s; }
.mode:hover { border-color: var(--accent); transform: translateY(-1px); }
.mode b { font-size: .98rem; }
.mode span { color: var(--muted); font-size: .8rem; }
.mode.featured { background: color-mix(in srgb, var(--accent) 8%, var(--surface)); border-color: color-mix(in srgb, var(--accent) 40%, var(--border)); }
.study-opts { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 14px; align-items: end; }
.study-opts label { min-width: 160px; }

.card-list { display: flex; flex-direction: column; gap: 8px; }
.card-row { display: grid; grid-template-columns: 1fr 1fr auto; gap: 12px; align-items: center; padding: 10px 14px; border: 1px solid var(--border);
  border-radius: 12px; background: var(--surface); }
.card-row .cell { min-width: 0; overflow: hidden; text-overflow: ellipsis; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; }
.card-row .cell img { height: 34px; width: auto; border-radius: 6px; vertical-align: middle; margin-right: 6px; }
.card-row .meta { display: flex; gap: 4px; align-items: center; }
.card-row.suspended { opacity: .55; }
@media (max-width: 600px) { .card-row { grid-template-columns: 1fr auto; } .card-row .cell.b { display: none; } }

/* ============ Editor ============ */
.side-editor { border: 1px solid var(--border); border-radius: 14px; padding: 14px; background: var(--surface); display: flex; flex-direction: column; gap: 10px; }
.side-editor .head { display: flex; justify-content: space-between; align-items: center; }
.side-editor .head b { display: flex; gap: 8px; align-items: center; }
.side-num { width: 24px; height: 24px; border-radius: 7px; display: grid; place-items: center; background: var(--accent); color: var(--accent-contrast); font-size: .8rem; }
.dropzone { border: 2px dashed var(--border); border-radius: 12px; padding: 12px; text-align: center; color: var(--muted); font-size: .85rem; cursor: pointer; transition: border-color .15s, background .15s; }
.dropzone.drag { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 7%, transparent); }
.img-preview { position: relative; display: inline-block; }
.img-preview img { max-height: 160px; border-radius: 10px; display: block; }
.img-preview button { position: absolute; top: 6px; right: 6px; }
.editor-grid { display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }

/* ============ Study ============ */
.study { max-width: 760px; margin: 0 auto; }
.study-top { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 14px; flex-wrap: wrap; }
.study-top .title { font-weight: 700; display: flex; align-items: center; gap: 8px; }
.study-meta { display: flex; gap: 10px; align-items: center; font-variant-numeric: tabular-nums; }
.study-meta .cnt { font-weight: 700; }
.c-new { color: var(--info); } .c-learn { color: var(--bad); } .c-due { color: var(--good); }
.progress { height: 6px; background: var(--surface-2); border-radius: 999px; overflow: hidden; margin-bottom: 18px; }
.progress > div { height: 100%; background: var(--accent); transition: width .3s; }

.flashcard { perspective: 1400px; cursor: pointer; user-select: none; -webkit-user-select: none; }
.flashcard .face {
  min-height: 320px; background: var(--card-bg); border: 1px solid var(--border); border-radius: 22px; box-shadow: var(--shadow);
  display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; padding: 28px 24px 40px;
  position: relative; transform-style: preserve-3d;
}
.face .side-label { position: absolute; top: 14px; left: 18px; font-size: .75rem; font-weight: 700; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); }
.face .tools { position: absolute; top: 8px; right: 10px; display: flex; gap: 2px; }
.face .dots { position: absolute; bottom: 14px; display: flex; gap: 6px; }
.face .dots i { width: 8px; height: 8px; border-radius: 50%; background: var(--border); }
.face .dots i.on { background: var(--accent); }
.face .content { font-size: 1.7rem; font-weight: 600; word-break: break-word; max-width: 100%; }
.face .content.long { font-size: 1.15rem; font-weight: 500; text-align: left; }
.face .content img { max-height: 220px; border-radius: 12px; margin: 0 auto 12px; display: block; }
.face .sub { margin-top: 14px; padding-top: 14px; border-top: 1px dashed var(--border); width: 100%; color: var(--muted); font-size: 1rem; }
.face .sub .lbl { font-size: .7rem; text-transform: uppercase; font-weight: 700; letter-spacing: .06em; display: block; }
.face .hint-flip { position: absolute; bottom: 12px; right: 18px; font-size: .75rem; color: var(--muted); }

.answer-bar { display: grid; gap: 10px; margin-top: 18px; }
.answer-bar.r4 { grid-template-columns: repeat(4, 1fr); }
.answer-bar.r3 { grid-template-columns: repeat(3, 1fr); }
.answer-bar.r2 { grid-template-columns: repeat(2, 1fr); }
.answer-bar.r1 { grid-template-columns: 1fr; }
.rate { display: flex; flex-direction: column; align-items: center; gap: 2px; padding: 12px 6px; border-radius: 14px; border: 1px solid var(--border);
  background: var(--surface); font: inherit; font-weight: 700; cursor: pointer; color: var(--text); transition: transform .08s, background .15s; }
.rate:active { transform: scale(.96); }
.rate small { font-weight: 500; color: var(--muted); font-size: .75rem; }
.rate kbd { font-size: .65rem; color: var(--muted); font-family: inherit; border: 1px solid var(--border); padding: 0 5px; border-radius: 4px; }
.rate.again { border-color: color-mix(in srgb, var(--bad) 45%, var(--border)); color: var(--bad); }
.rate.again:hover { background: color-mix(in srgb, var(--bad) 9%, var(--surface)); }
.rate.hard { border-color: color-mix(in srgb, var(--warn) 45%, var(--border)); color: var(--warn); }
.rate.hard:hover { background: color-mix(in srgb, var(--warn) 9%, var(--surface)); }
.rate.good { border-color: color-mix(in srgb, var(--good) 45%, var(--border)); color: var(--good); }
.rate.good:hover { background: color-mix(in srgb, var(--good) 9%, var(--surface)); }
.rate.easy { border-color: color-mix(in srgb, var(--info) 45%, var(--border)); color: var(--info); }
.rate.easy:hover { background: color-mix(in srgb, var(--info) 9%, var(--surface)); }
.rate.show { background: var(--accent); color: var(--accent-contrast); border-color: var(--accent); padding: 15px; }
@media (max-width: 520px) { .answer-bar.r4 { grid-template-columns: repeat(2, 1fr); } .flashcard .face { min-height: 260px; } .face .content { font-size: 1.4rem; } }

.question-box { background: var(--card-bg); border: 1px solid var(--border); border-radius: 22px; box-shadow: var(--shadow); padding: 28px 24px; text-align: center; position: relative; }
.question-box .content { font-size: 1.6rem; font-weight: 600; word-break: break-word; }
.question-box .content img { max-height: 200px; border-radius: 12px; margin: 0 auto 10px; display: block; }
.question-box .side-label { font-size: .75rem; font-weight: 700; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); margin-bottom: 10px; }
.question-box .tools { position: absolute; top: 8px; right: 10px; }
.options { display: grid; gap: 10px; margin-top: 16px; grid-template-columns: repeat(2, 1fr); }
@media (max-width: 560px) { .options { grid-template-columns: 1fr; } }
.option { display: flex; gap: 12px; align-items: center; text-align: left; padding: 14px 16px; border-radius: 14px; border: 1.5px solid var(--border);
  background: var(--surface); font: inherit; font-size: 1rem; cursor: pointer; color: var(--text); transition: border-color .12s, background .12s; min-height: 58px; }
.option:hover:not(:disabled) { border-color: var(--accent); }
.option .k { flex: none; width: 26px; height: 26px; border-radius: 8px; display: grid; place-items: center; background: var(--surface-2); font-size: .8rem; font-weight: 700; color: var(--muted); }
.option img { max-height: 70px; border-radius: 8px; }
.option.correct { border-color: var(--good); background: color-mix(in srgb, var(--good) 12%, var(--surface)); }
.option.wrong { border-color: var(--bad); background: color-mix(in srgb, var(--bad) 10%, var(--surface)); }
.option:disabled { cursor: default; }

.type-input { display: flex; gap: 8px; margin-top: 16px; }
.type-input input { font-size: 1.15rem; padding: 13px 16px; border-radius: 14px; }
.feedback { margin-top: 16px; padding: 14px 16px; border-radius: 14px; border: 1px solid var(--border); background: var(--surface); }
.feedback.ok { border-color: var(--good); background: color-mix(in srgb, var(--good) 10%, var(--surface)); }
.feedback.no { border-color: var(--bad); background: color-mix(in srgb, var(--bad) 8%, var(--surface)); }
.feedback .row { display: flex; justify-content: space-between; align-items: center; gap: 10px; flex-wrap: wrap; }
.diff ins { text-decoration: none; background: color-mix(in srgb, var(--good) 25%, transparent); border-radius: 3px; }
.diff del { background: color-mix(in srgb, var(--bad) 25%, transparent); border-radius: 3px; }

.match-grid { display: grid; gap: 10px; grid-template-columns: repeat(4, 1fr); }
@media (max-width: 640px) { .match-grid { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 420px) { .match-grid { grid-template-columns: repeat(2, 1fr); } }
.tile { min-height: 96px; padding: 10px; border-radius: 14px; border: 1.5px solid var(--border); background: var(--surface); cursor: pointer;
  display: grid; place-items: center; text-align: center; font: inherit; font-weight: 600; color: var(--text); transition: transform .12s, opacity .3s, border-color .12s; word-break: break-word; }
.tile img { max-height: 70px; border-radius: 8px; }
.tile.sel { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 10%, var(--surface)); }
.tile.done { opacity: 0; pointer-events: none; transform: scale(.85); }
.tile.bad { animation: shake .35s; border-color: var(--bad); }
@keyframes shake { 0%,100% { transform: translateX(0); } 25% { transform: translateX(-6px); } 75% { transform: translateX(6px); } }

.result { text-align: center; }
.result .score { font-size: 3rem; font-weight: 800; color: var(--accent); }
.result-stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); gap: 12px; margin: 20px 0; }
.result-stats div { background: var(--surface-2); border-radius: 14px; padding: 12px; }
.result-stats b { display: block; font-size: 1.4rem; }
.wrong-list { text-align: left; margin-top: 16px; }
.wrong-list .item { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; padding: 10px 12px; border-bottom: 1px solid var(--border); }

/* ============ Statistik ============ */
.kpis { display: grid; gap: 12px; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); }
.kpi { background: var(--surface); border: 1px solid var(--border); border-radius: 16px; padding: 16px; box-shadow: var(--shadow); }
.kpi span { color: var(--muted); font-size: .8rem; font-weight: 600; }
.kpi b { display: block; font-size: 1.6rem; margin-top: 2px; font-variant-numeric: tabular-nums; }
.kpi small { color: var(--muted); }
.chart { width: 100%; overflow-x: auto; }
.chart svg text { fill: var(--muted); font-size: 10px; }
.heatmap { display: grid; grid-auto-flow: column; grid-template-rows: repeat(7, 13px); gap: 3px; overflow-x: auto; padding-bottom: 4px; }
.heatmap i { width: 13px; height: 13px; border-radius: 3px; background: var(--surface-2); display: block; }
.heatmap i[data-l="1"] { background: color-mix(in srgb, var(--accent) 30%, var(--surface-2)); }
.heatmap i[data-l="2"] { background: color-mix(in srgb, var(--accent) 55%, var(--surface-2)); }
.heatmap i[data-l="3"] { background: color-mix(in srgb, var(--accent) 78%, var(--surface-2)); }
.heatmap i[data-l="4"] { background: var(--accent); }
table.tbl { width: 100%; border-collapse: collapse; font-size: .9rem; }
.tbl th, .tbl td { padding: 9px 10px; text-align: left; border-bottom: 1px solid var(--border); }
.tbl th { color: var(--muted); font-weight: 600; font-size: .8rem; }
.tbl td.num, .tbl th.num { text-align: right; font-variant-numeric: tabular-nums; }
.legend { display: flex; gap: 14px; flex-wrap: wrap; font-size: .8rem; color: var(--muted); margin-top: 8px; }
.legend i { display: inline-block; width: 10px; height: 10px; border-radius: 3px; margin-right: 5px; vertical-align: -1px; }

/* ============ Pengaturan ============ */
.theme-swatches { display: grid; gap: 10px; grid-template-columns: repeat(auto-fill, minmax(110px, 1fr)); }
.swatch { border: 2px solid var(--border); border-radius: 14px; padding: 8px; cursor: pointer; background: transparent; font: inherit; color: var(--text); text-align: center; font-size: .82rem; font-weight: 600; }
.swatch.active { border-color: var(--accent); }
.swatch .pv { height: 46px; border-radius: 9px; margin-bottom: 6px; display: flex; overflow: hidden; border: 1px solid rgba(0,0,0,.08); }
.swatch .pv span { flex: 1; }

/* ============ Modal & toast ============ */
.modal-backdrop { position: fixed; inset: 0; background: rgba(10,12,25,.5); z-index: 50; display: grid; place-items: center; padding: 16px; animation: fade .15s; }
.modal { background: var(--surface); color: var(--text); border-radius: 20px; width: min(560px, 100%); max-height: 90vh; overflow: auto; box-shadow: 0 20px 60px rgba(0,0,0,.3); animation: pop .18s; }
.modal.wide { width: min(820px, 100%); }
.modal header { padding: 18px 22px 0; display: flex; justify-content: space-between; align-items: center; }
.modal header h2 { margin: 0; }
.modal .body { padding: 16px 22px; }
.modal footer { padding: 0 22px 20px; display: flex; justify-content: flex-end; gap: 8px; flex-wrap: wrap; }
@keyframes fade { from { opacity: 0; } }
@keyframes pop { from { transform: scale(.96); opacity: 0; } }
#toasts { position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%); z-index: 60; display: flex; flex-direction: column; gap: 8px; align-items: center; pointer-events: none; }
.toast { background: var(--text); color: var(--bg); padding: 10px 16px; border-radius: 12px; font-weight: 600; box-shadow: var(--shadow); animation: pop .2s; max-width: 90vw; }
.toast.good { background: var(--good); color: #fff; }
.toast.bad { background: var(--bad); color: #fff; }

.color-pick { display: flex; gap: 6px; flex-wrap: wrap; align-items: center; }
.color-pick button { width: 28px; height: 28px; border-radius: 50%; border: 2px solid transparent; cursor: pointer; }
.color-pick button.active { border-color: var(--text); }

pre.code { background: var(--surface-2); border-radius: 12px; padding: 14px; overflow: auto; font-size: .82rem; max-height: 340px; white-space: pre-wrap; word-break: break-word; }
.kbd-help { display: flex; gap: 14px; flex-wrap: wrap; justify-content: center; color: var(--muted); font-size: .78rem; margin-top: 18px; }
.kbd-help kbd { font-family: inherit; border: 1px solid var(--border); background: var(--surface); border-radius: 5px; padding: 0 6px; }

/* =====================================================================
   LAPISAN MOBILE — semua tata letak dioptimalkan untuk layar HP (portrait)
   ===================================================================== */
:root { --bar-h: 56px; --tab-h: 64px; --safe-t: env(safe-area-inset-top, 0px); --safe-b: env(safe-area-inset-bottom, 0px); }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body {
  font-size: 16px; min-height: 100dvh; overscroll-behavior-y: none;
  -webkit-tap-highlight-color: transparent; touch-action: manipulation;
}
button, .btn, a, .deck-card, .mode, .card-row, .tile, .option, .rate, .mainnav, .chip { -webkit-user-select: none; user-select: none; -webkit-touch-callout: none; }
.btn:hover, .mainnav a:hover, .btn.ghost:hover { background: inherit; }
@media (hover: none) { .deck-card:hover, .mode:hover { transform: none; } }

/* Header aplikasi */
.topbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 30;
  height: calc(var(--bar-h) + var(--safe-t)); padding: var(--safe-t) 6px 0 10px;
  display: flex; align-items: center; gap: 4px; justify-content: flex-start;
  background: var(--surface); backdrop-filter: none; -webkit-backdrop-filter: none; border-bottom: 1px solid var(--border);
}
.topbar .brand { flex: 1; font-size: 1.1rem; padding-left: 4px; }
.bar-title { flex: 1; margin: 0; font-size: 1.08rem; font-weight: 700; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.bar-actions { display: flex; gap: 2px; margin-left: auto; }
.bar-btn, .bar-actions .btn { width: 44px; height: 44px; padding: 0; border-radius: 12px; }

/* Tab bar bawah */
.mainnav {
  position: fixed; bottom: 0; left: 0; right: 0; z-index: 30;
  display: grid; grid-auto-flow: column; grid-auto-columns: 1fr; gap: 4px;
  padding: 6px 8px calc(6px + var(--safe-b)); background: var(--surface); border-top: 1px solid var(--border);
}
.mainnav a {
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 3px;
  min-height: 52px; padding: 4px 0; border-radius: 14px; font-size: .72rem; font-weight: 600; color: var(--muted);
}
.mainnav a .ic { width: 22px; height: 22px; }
.mainnav a.active { color: var(--accent); background: var(--surface-2); }

#view {
  max-width: 640px; margin: 0 auto;
  padding: calc(var(--bar-h) + var(--safe-t) + 14px) 14px calc(var(--tab-h) + var(--safe-b) + 24px);
}

/* Mode imersif (sesi belajar): tanpa header & tab bar */
body.immersive .topbar, body.immersive .mainnav, body.immersive .fab { display: none; }
body.immersive #view { padding: calc(var(--safe-t) + 8px) 12px calc(var(--safe-b) + 12px); min-height: 100dvh; display: flex; flex-direction: column; }
body.immersive { overflow: hidden; height: 100dvh; }

/* Tombol aksi melayang */
.fab {
  position: fixed; right: 16px; bottom: calc(var(--tab-h) + var(--safe-b) + 16px); z-index: 25;
  width: 60px; height: 60px; border-radius: 20px; border: 0; display: grid; place-items: center;
  background: var(--accent); color: var(--accent-contrast); box-shadow: 0 8px 24px rgba(0,0,0,.22); cursor: pointer;
  transition: transform .2s cubic-bezier(.34,1.56,.64,1);
}
.fab:active { transform: scale(.9); }
.fab .ic { width: 28px; height: 28px; }

/* Ukuran sentuh minimum 44–48px */
.btn { min-height: 46px; padding: 10px 16px; border-radius: 13px; font-size: 1rem; }
.btn.sm { min-height: 38px; padding: 6px 12px; font-size: .9rem; }
.btn.lg { min-height: 54px; font-size: 1.08rem; }
.btn.icon { min-width: 44px; padding: 0 10px; }
.btn.block { width: 100%; }
.btn-row { gap: 10px; }
.btn-row.stack { flex-direction: column; align-items: stretch; }
.btn-row.stack .btn { width: 100%; }
input[type=text], input[type=number], input[type=time], input[type=url], input[type=search], select, textarea {
  font-size: 16px; min-height: 48px; padding: 11px 14px; border-radius: 12px;  /* 16px mencegah auto-zoom iOS */
}
textarea { min-height: 96px; }
label.field { font-size: .9rem; }

h1 { font-size: 1.5rem; } h2 { font-size: 1.15rem; }
.section { margin-top: 22px; }
.panel { padding: 16px; border-radius: 18px; }
.grid.cols-2, .grid.cols-3, .grid.cols-4 { grid-template-columns: 1fr; }
.form-grid { grid-template-columns: 1fr; }
.kpis { grid-template-columns: repeat(2, 1fr); gap: 10px; }
.kpi { padding: 14px; }
.kpi b { font-size: 1.35rem; }
.switch { padding: 14px 0; }
.toggle { width: 52px; height: 30px; }
.toggle span::after { width: 24px; height: 24px; }
.toggle input:checked + span::after { transform: translateX(22px); }

/* Beranda */
.hero { grid-template-columns: 1fr auto; padding: 20px; border-radius: 22px; gap: 12px; }
.hero h1 { font-size: 1.45rem; }
.hero-stats { gap: 16px; }
.hero-stats div b { font-size: 1.2rem; }
.ring { width: 84px; height: 84px; align-self: start; }
.ring svg { width: 84px; height: 84px; }
.ring .lbl { font-size: .62rem; } .ring .lbl b { font-size: 1.05rem; }
.hero .cta { grid-column: 1 / -1; }
.hero .cta .btn { width: 100%; }
.deck-card { padding: 16px; gap: 10px; }
.deck-card .row { display: flex; gap: 12px; align-items: center; }
.deck-card .go { margin-left: auto; }
.deck-card.add { min-height: 0; padding: 20px; flex-direction: row; gap: 10px; }
.install-card { display: flex; gap: 12px; align-items: center; }

/* Deck: tab yang bisa digeser */
.deck-header { gap: 12px; flex-wrap: nowrap; }
.deck-header .deck-emoji { width: 52px; height: 52px; font-size: 1.6rem; }
.deck-header h1 { font-size: 1.3rem; }
.seg { position: sticky; top: calc(var(--bar-h) + var(--safe-t)); z-index: 10; display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 4px; padding: 4px; margin: 16px -14px 0; padding-inline: 14px; background: var(--bg); }
.seg button { border: 0; background: var(--surface-2); color: var(--muted); font: inherit; font-weight: 700; min-height: 42px; border-radius: 12px; }
.seg button.active { background: var(--accent); color: var(--accent-contrast); }
.pager { display: flex; overflow-x: auto; scroll-snap-type: x mandatory; scrollbar-width: none; margin: 0 -14px; align-items: flex-start;
  overscroll-behavior-x: contain; transition: height .25s; }
.pager::-webkit-scrollbar { display: none; }
.pane { flex: 0 0 100%; scroll-snap-align: start; scroll-snap-stop: always; padding: 14px 14px 0; min-width: 0; }

.mode-grid { grid-template-columns: 1fr; gap: 10px; }
.mode { flex-direction: row; align-items: center; gap: 12px; padding: 14px 16px; min-height: 64px; }
.mode .txt { display: flex; flex-direction: column; gap: 2px; flex: 1; min-width: 0; }
.mode .chev { color: var(--muted); font-size: 1.4rem; line-height: 1; }

/* Quick modes di beranda */
.quick-modes-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }
@media (min-width: 480px) { .quick-modes-grid { grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); } }
.quick-mode-card {
  display: flex; flex-direction: column; align-items: flex-start; justify-content: space-between;
  padding: 12px 14px; border-radius: var(--radius); border: 1px solid var(--border);
  background: var(--surface); color: var(--text); text-align: left; cursor: pointer;
  transition: transform .08s, background .15s, border-color .15s; min-height: 84px;
}
.quick-mode-card:hover { border-color: var(--accent); }
.quick-mode-card:active { transform: scale(0.97); }
.quick-mode-card .qm-top { display: flex; width: 100%; justify-content: space-between; align-items: center; margin-bottom: 6px; }
.quick-mode-card .qm-icon { color: var(--accent); display: flex; align-items: center; }
.quick-mode-card b { font-size: .92rem; font-weight: 700; line-height: 1.2; }
.quick-mode-card span:not(.badge):not(.qm-icon) { font-size: .75rem; color: var(--muted); margin-top: 2px; }
.quick-mode-card.featured { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 8%, var(--surface)); }

/* Rate picker modal & tema */
.rate-picker-grid button.rate { border: 1px solid var(--border); box-shadow: var(--shadow); cursor: pointer; }
details.theme-more-toggle summary { list-style: none; }
details.theme-more-toggle summary::-webkit-details-marker { display: none; }

.chips { display: flex; gap: 8px; flex-wrap: wrap; }
.chip { border: 1.5px solid var(--border); background: var(--surface); color: var(--text); font: inherit; font-weight: 600; font-size: .92rem;
  min-height: 40px; padding: 6px 14px; border-radius: 999px; cursor: pointer; }
.chip.active { background: var(--accent); color: var(--accent-contrast); border-color: var(--accent); }
.opt-group { margin-bottom: 16px; }
.opt-group > b { display: block; font-size: .85rem; margin-bottom: 8px; color: var(--muted); }

/* Baris kartu: geser kiri untuk aksi */
.card-list { gap: 10px; }
.swipe-row { position: relative; border-radius: 14px; overflow: hidden; }
.swipe-row .actions { position: absolute; inset: 0 0 0 auto; display: flex; }
.swipe-row .actions button { width: 76px; border: 0; font: inherit; font-weight: 700; font-size: .78rem; color: #fff; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 4px; }
.swipe-row .act-star { background: #d97706; } .swipe-row .act-sus { background: #475569; } .swipe-row .act-del { background: #dc2626; }
.card-row { position: relative; z-index: 1; grid-template-columns: 1fr auto; padding: 12px 14px; touch-action: pan-y; transition: transform .25s cubic-bezier(.22,1,.36,1); }
.card-row .cell.b { display: -webkit-box; grid-column: 1; font-size: .9rem; }
.card-row .cell.a { grid-column: 1; }
.card-row .meta { grid-column: 2; grid-row: 1 / span 2; flex-direction: column; align-items: flex-end; gap: 6px; }
.card-row .star-on { color: #d97706; }
.list-tools { display: flex; gap: 8px; margin-bottom: 12px; }
.list-tools input { flex: 1; }
.list-tools select { width: 42%; }

/* Bottom sheet */
.modal-backdrop { place-items: end center; padding: 0; background: rgba(10,12,25,.45); }
.modal-backdrop.closing { background: transparent; transition: background .2s; }
.modal { width: 100%; max-width: 640px; max-height: 92dvh; border-radius: 22px 22px 0 0; display: flex; flex-direction: column;
  animation: sheet-up .3s cubic-bezier(.22,1,.36,1); padding-bottom: var(--safe-b); }
.modal.wide { width: 100%; }
.modal.full { height: 96dvh; max-height: 96dvh; }
.modal .grabber { width: 42px; height: 5px; border-radius: 999px; background: var(--border); margin: 8px auto 0; flex: none; }
.modal header { padding: 8px 16px 0; touch-action: none; cursor: grab; }
.modal .body { padding: 12px 16px 16px; overflow-y: auto; flex: 1; overscroll-behavior: contain; -webkit-overflow-scrolling: touch; }
.modal footer { padding: 10px 16px 12px; border-top: 1px solid var(--border); display: grid; grid-auto-flow: column; grid-auto-columns: 1fr; gap: 8px; }
.modal footer .btn { width: 100%; padding-inline: 8px; white-space: normal; line-height: 1.2; }
@keyframes sheet-up { from { transform: translateY(100%); } }
.sheet-list { display: flex; flex-direction: column; gap: 8px; }
.sheet-list .btn { justify-content: flex-start; gap: 12px; min-height: 52px; }

/* Editor kartu */
.editor-grid { grid-template-columns: 1fr; gap: 12px; }
.img-btns { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 8px; }
.img-btns .btn { min-height: 44px; font-size: .88rem; gap: 6px; padding: 6px; }
.img-preview img { max-height: 200px; }
.img-preview button { width: 40px; height: 40px; }

/* Toast di atas agar tidak tertutup jempol / tab bar */
#toasts { top: calc(var(--safe-t) + var(--bar-h) + 10px); bottom: auto; width: calc(100% - 32px); }
.toast { text-align: center; border-radius: 14px; padding: 12px 16px; }

/* ================= Sesi belajar ================= */
.study { max-width: 560px; width: 100%; margin: 0 auto; display: flex; flex-direction: column; flex: 1; min-height: 0; }
.study-top { margin-bottom: 8px; flex-wrap: nowrap; }
.study-top .title { min-width: 0; font-size: .95rem; }
.study-top .title .name { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.study-top .title .badge { display: none; }
#st-exit { width: 44px; height: 44px; flex: none; }
.progress { margin-bottom: 12px; }
.kbd-help, .rate kbd, .option .k { display: none; }
.study .flashcard { flex: 1; min-height: 0; display: flex; position: relative; touch-action: none; }
.study .flashcard .face { flex: 1; min-height: 0; overflow: hidden; will-change: transform; padding: 44px 20px 40px; }
.face .content { overflow-y: auto; max-height: 100%; }
.face .content img { max-height: 34dvh; }
.face .tools .btn { width: 42px; height: 42px; min-height: 42px; }
.answer-bar { margin-top: 12px; gap: 8px; }
.answer-bar.r4 { grid-template-columns: repeat(4, 1fr); }
.rate { padding: 10px 2px; min-height: 64px; border-radius: 16px; font-size: .92rem; }
.rate small { font-size: .7rem; }
.rate.show { min-height: 60px; font-size: 1.05rem; }
.swipe-hint { text-align: center; color: var(--muted); font-size: .78rem; margin-top: 8px; min-height: 1.2em; }

/* Stempel saat menggeser kartu */
.stamp { position: absolute; top: 18px; padding: 6px 14px; border: 3px solid currentColor; border-radius: 12px; font-weight: 800; font-size: 1.15rem;
  text-transform: uppercase; letter-spacing: .04em; opacity: 0; pointer-events: none; z-index: 3; background: var(--card-bg);
  display: flex; flex-direction: column; align-items: center; justify-content: center; line-height: 1.15; text-align: center; }
.stamp .stamp-time { font-size: 1.15rem; font-weight: 800; }
.stamp .stamp-sub { font-size: .65rem; font-weight: 700; opacity: .85; letter-spacing: .05em; text-transform: uppercase; margin-top: 2px; }
.stamp.right { left: 18px; transform: rotate(-12deg); color: var(--good); }
.stamp.left { right: 18px; transform: rotate(12deg); color: var(--bad); }
.stamp.up { left: 50%; top: auto; bottom: 22px; transform: translateX(-50%); color: var(--good); }
.stamp.down { left: 50%; transform: translateX(-50%); color: var(--warn); }
.face .tint { position: absolute; inset: 0; opacity: 0; pointer-events: none; border-radius: inherit; z-index: 0; }
.face > *:not(.tint) { position: relative; z-index: 1; }
.face .side-label, .face .tools, .face .dots, .face .hint-flip, .face .stamp { position: absolute; }

/* Panduan gestur */
.coach { position: fixed; inset: 0; z-index: 70; background: rgba(10,12,25,.82); color: #fff; display: grid; place-items: center; padding: 24px; animation: fade .2s; }
.coach .box { max-width: 340px; width: 100%; text-align: center; }
.coach h2 { color: #fff; }
.coach .g { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin: 18px 0; }
.coach .g div { border: 1.5px solid rgba(255,255,255,.35); border-radius: 14px; padding: 12px 8px; font-size: .9rem; }
.coach .g b { display: block; font-size: 1.4rem; line-height: 1; margin-bottom: 4px; }

/* Kuis */
.question-box { padding: 22px 18px; }
.question-box .content { font-size: 1.45rem; }
.study .options { grid-template-columns: 1fr; gap: 10px; margin-top: 14px; }
.option { min-height: 56px; padding: 12px 16px; font-size: 1.02rem; border-radius: 16px; }
.quiz-scroll { flex: 1; min-height: 0; overflow-y: auto; overscroll-behavior: contain; padding-bottom: 8px; }
.quiz-foot { padding-top: 10px; }
.quiz-foot .btn { width: 100%; }
.type-input { flex-direction: column; }
.type-input input { font-size: 1.15rem; min-height: 54px; }
.type-input .btn { width: 100%; }
.feedback { border-radius: 16px; }
.tf-card { touch-action: none; position: relative; will-change: transform; }
.tf-card .question-box + .question-box { margin-top: 10px; }

/* Mencocokkan */
.match-grid { grid-template-columns: repeat(3, 1fr); gap: 8px; flex: 1; align-content: center; }
.tile { min-height: 84px; font-size: .9rem; padding: 8px 6px; border-radius: 14px; }

.result .score { font-size: 2.6rem; }
.result-stats { grid-template-columns: repeat(2, 1fr); }
.wrong-list .item { grid-template-columns: 1fr; gap: 2px; }

/* Statistik */
.chart svg { min-width: 0 !important; }
.heatmap { grid-template-rows: repeat(7, 14px); justify-content: center; }
.heatmap i { width: 14px; height: 14px; }
.tbl { font-size: .85rem; }
.theme-swatches { grid-template-columns: repeat(3, 1fr); }
.color-pick button { width: 36px; height: 36px; }
pre.code { max-height: 220px; font-size: .78rem; }


/* =====================================================================
   Tema NEOBRUTAL — berdasarkan "Neubrutalism Design System (Fluid Motion)"
   Garis hitam tebal, bayangan keras 45° tanpa blur, warna solid
   kuning / merah / biru, tanpa gradien & transparansi, efek "tekan".
   Skala diperkecil dari kanvas video 1080px ke web (÷3).
   ===================================================================== */
[data-theme="brutal"] {
  --nb-yellow: #FFEB3B; --nb-red: #FF5252; --nb-blue: #2196F3; --ink: #000000; --paper: #FFFFFF;
  --bg: var(--paper); --surface: var(--paper); --surface-2: var(--paper); --card-bg: var(--paper);
  --text: var(--ink); --muted: #2b2b2b; --border: var(--ink);
  --accent: var(--nb-yellow); --accent-2: var(--nb-yellow); --accent-contrast: var(--ink);
  --good: var(--nb-blue); --bad: var(--nb-red); --warn: var(--ink); --info: var(--nb-blue);
  --lv-new: var(--paper); --lv-learn: var(--nb-red); --lv-young: var(--nb-yellow); --lv-mature: var(--nb-blue);
  color-scheme: light;
}
[data-theme="brutal-dark"] {
  --nb-yellow: #FFEB3B; --nb-red: #FF5252; --nb-blue: #2196F3; --ink: #FFFFFF; --paper: #000000;
  --bg: var(--paper); --surface: var(--paper); --surface-2: var(--paper); --card-bg: var(--paper);
  --text: var(--ink); --muted: #d6d6d6; --border: var(--ink);
  --accent: var(--nb-yellow); --accent-2: var(--nb-yellow); --accent-contrast: #000;
  --good: var(--nb-blue); --bad: var(--nb-red); --warn: var(--nb-yellow); --info: var(--nb-blue);
  --lv-new: var(--paper); --lv-learn: var(--nb-red); --lv-young: var(--nb-yellow); --lv-mature: var(--nb-blue);
  color-scheme: dark;
}
[data-theme^="brutal"] {
  --bw: 3px; --sh-sm: 3px 3px 0 var(--border); --sh: 5px 5px 0 var(--border); --sh-lg: 8px 8px 0 var(--border);
  --shadow: var(--sh); --radius: 12px;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --press: cubic-bezier(0.7, 0, 0.84, 0); --spring: cubic-bezier(0.34, 1.7, 0.64, 1);
}
[data-theme^="brutal"] body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, "Helvetica Neue", Arial, "Noto Sans JP", sans-serif; }
[data-theme^="brutal"] h1, [data-theme^="brutal"] h2, [data-theme^="brutal"] h3 { font-weight: 800; letter-spacing: -0.02em; }
[data-theme^="brutal"] h1 { font-size: 2rem; }
[data-theme^="brutal"] a:not(.btn):not(.deck-card):not(.brand):not(.mainnav a) { color: var(--text); text-decoration: underline; text-decoration-thickness: 2px; text-underline-offset: 2px; }

/* Bilangan & penghitung memakai mono */
[data-theme^="brutal"] :is(.kpi b, .hero-stats b, .result .score, .result-stats b, #st-clock, #m-time, .study-meta .cnt, .ring .lbl b, .badge, .tbl td.num) {
  font-family: var(--mono); font-weight: 800; letter-spacing: -0.02em;
}
/* Label: huruf kapital, tebal, sedikit renggang */
[data-theme^="brutal"] :is(.kpi span, .face .side-label, .question-box .side-label, label.field, .result-stats span, .tbl th, .rate small) {
  text-transform: uppercase; letter-spacing: .04em; font-weight: 700; font-size: .78rem;
}
[data-theme^="brutal"] label.field .hint { text-transform: none; letter-spacing: 0; font-weight: 500; }

/* Kerangka */
[data-theme^="brutal"] .topbar { background: var(--bg); backdrop-filter: none; -webkit-backdrop-filter: none; border-bottom: var(--bw) solid var(--border); }
[data-theme^="brutal"] .brand { font-weight: 800; letter-spacing: -0.02em; }
[data-theme^="brutal"] .mainnav a { color: var(--text); font-weight: 700; border: var(--bw) solid transparent; border-radius: 10px; }
[data-theme^="brutal"] .mainnav a:hover { background: transparent; border-color: var(--border); }
[data-theme^="brutal"] .mainnav a.active { background: var(--nb-yellow); color: #000; border-color: var(--border); box-shadow: var(--sh-sm); }
[data-theme^="brutal"] .mainnav { border-top: var(--bw) solid var(--border); background: var(--bg); }
[data-theme^="brutal"] .mainnav a { border-radius: 12px; }

/* Permukaan berbingkai + bayangan keras */
[data-theme^="brutal"] :is(.panel, .kpi, .deck-card, .mode, .card-row, .side-editor, .question-box, .flashcard .face, .option, .tile, .rate, .feedback, .swatch, .result-stats div, .modal) {
  border: var(--bw) solid var(--border); border-radius: var(--radius); box-shadow: var(--sh);
}
[data-theme^="brutal"] .flashcard { perspective: none; }
[data-theme^="brutal"] .flashcard .face, [data-theme^="brutal"] .question-box { box-shadow: var(--sh-lg); }
[data-theme^="brutal"] .modal { box-shadow: var(--sh-lg); }
[data-theme^="brutal"] .modal-backdrop { background: rgba(0, 0, 0, .55); }
[data-theme^="brutal"] .card-row { box-shadow: var(--sh-sm); }

/* Tombol: efek tekan — bergeser ke arah bayangan, bayangan hilang, lalu memantul balik */
[data-theme^="brutal"] .btn, [data-theme^="brutal"] .rate, [data-theme^="brutal"] .option, [data-theme^="brutal"] .tile, [data-theme^="brutal"] .mode, [data-theme^="brutal"] .deck-card, [data-theme^="brutal"] .swatch {
  transition: transform 250ms var(--spring), box-shadow 250ms var(--spring);
}
[data-theme^="brutal"] .btn { border: var(--bw) solid var(--border); border-radius: 10px; box-shadow: 4px 4px 0 var(--border); font-weight: 800; background: var(--surface); color: var(--text); }
[data-theme^="brutal"] .btn:hover { background: var(--surface); }
[data-theme^="brutal"] :is(.btn, .rate, .option, .tile, .mode, .deck-card, .swatch):active:not(:disabled) {
  transform: translate(4px, 4px); box-shadow: 0 0 0 var(--border); transition-duration: 100ms; transition-timing-function: var(--press);
}
[data-theme^="brutal"] .btn.primary { background: var(--nb-yellow); color: #000; border-color: var(--border); }
[data-theme^="brutal"] .btn.primary:hover { filter: none; }
[data-theme^="brutal"] .btn.danger { background: var(--nb-red); color: #000; }
[data-theme^="brutal"] .btn.ghost { border-color: transparent; box-shadow: none; background: transparent; }
[data-theme^="brutal"] .btn.ghost:hover { border-color: var(--border); }
[data-theme^="brutal"] .btn.ghost:active { transform: none; }
[data-theme^="brutal"] .btn:disabled { opacity: 1; background: var(--surface); color: var(--muted); box-shadow: none; border-style: dashed; }
[data-theme^="brutal"] .btn.sm { border-width: 2px; box-shadow: 3px 3px 0 var(--border); }

/* Formulir */
[data-theme^="brutal"] :is(input[type=text], input[type=number], input[type=time], input[type=url], input[type=search], select, textarea) {
  border: var(--bw) solid var(--border); border-radius: 10px; background: var(--surface); font-weight: 500;
}
[data-theme^="brutal"] :is(input, select, textarea):focus { border-color: var(--border); box-shadow: 4px 4px 0 var(--nb-blue); }
[data-theme^="brutal"] .toggle span { border: var(--bw) solid var(--border); background: var(--surface); }
[data-theme^="brutal"] .toggle span::after { background: var(--border); box-shadow: none; top: 2px; left: 2px; width: 16px; height: 16px; }
[data-theme^="brutal"] .toggle input:checked + span { background: var(--nb-yellow); border-color: var(--border); }
[data-theme^="brutal"] .toggle input:checked + span::after { background: #000; transform: translateX(18px); }
[data-theme^="brutal"] .switch { border-bottom: 2px solid var(--border); }
[data-theme^="brutal"] .dropzone { border: var(--bw) dashed var(--border); color: var(--text); font-weight: 600; }
[data-theme^="brutal"] .dropzone.drag { background: var(--nb-yellow); color: #000; }
[data-theme^="brutal"] .img-preview img { border: var(--bw) solid var(--border); }
[data-theme^="brutal"] .side-num { background: var(--nb-yellow); color: #000; border: 2px solid var(--border); border-radius: 6px; }
[data-theme^="brutal"] input[type=color] { border: var(--bw) solid var(--border); }
[data-theme^="brutal"] pre.code { background: var(--surface); border: var(--bw) solid var(--border); border-radius: var(--radius); font-family: var(--mono); }
[data-theme^="brutal"] kbd, [data-theme^="brutal"] .rate kbd { border: 2px solid var(--border); border-radius: 4px; font-family: var(--mono); color: inherit; background: var(--surface); }
[data-theme^="brutal"] .rate kbd { background: transparent; }

/* Beranda */
[data-theme^="brutal"] .hero { background: var(--nb-yellow); color: #000; border: var(--bw) solid var(--border); box-shadow: var(--sh-lg); border-radius: 18px; }
[data-theme^="brutal"] .hero p { opacity: 1; }
[data-theme^="brutal"] .hero-stats div span { opacity: 1; font-weight: 700; text-transform: uppercase; letter-spacing: .04em; font-size: .72rem; }
[data-theme^="brutal"] .hero .btn { background: #fff; color: #000; border-color: #000; box-shadow: 4px 4px 0 #000; }
[data-theme^="brutal"] .ring circle:first-child { stroke-opacity: 1; stroke: #fff; }
[data-theme^="brutal"] .deck-card::before { display: none; }
[data-theme^="brutal"] .deck-card:hover { transform: none; }
[data-theme^="brutal"] .deck-card.add { border-style: dashed; box-shadow: none; color: var(--text); }
[data-theme^="brutal"] .deck-emoji { background: var(--deck-color, var(--nb-yellow)); color: #000; border: var(--bw) solid var(--border); border-radius: 10px; }
[data-theme^="brutal"] .deck-card .desc { color: var(--muted); }
[data-theme^="brutal"] .mastery-bar { height: 14px; border: 2px solid var(--border); border-radius: 6px; background: var(--surface); }
[data-theme^="brutal"] .mastery-bar span + span { border-left: 2px solid var(--border); }
[data-theme^="brutal"] .legend i { border: 2px solid var(--border); border-radius: 3px; width: 12px; height: 12px; }

/* Lencana & tag */
[data-theme^="brutal"] .badge { border: 2px solid var(--border); border-radius: 6px; background: var(--surface); color: var(--text) !important; font-size: .72rem; }
[data-theme^="brutal"] .badge.new { background: var(--nb-blue); color: #000 !important; }
[data-theme^="brutal"] .badge.learn { background: var(--nb-red); color: #000 !important; }
[data-theme^="brutal"] .badge.due { background: var(--nb-yellow); color: #000 !important; }
[data-theme^="brutal"] .tag { border: 2px solid var(--border); border-radius: 5px; background: var(--surface); color: var(--text); font-weight: 700; }

/* Mode belajar */
[data-theme^="brutal"] .mode:hover { border-color: var(--border); transform: none; }
[data-theme^="brutal"] .mode.featured { background: var(--nb-yellow); color: #000; border-color: var(--border); }
[data-theme^="brutal"] .mode.featured span { color: #000; }
[data-theme^="brutal"] .mode b { font-size: 1.02rem; font-weight: 800; }

/* Sesi belajar */
[data-theme^="brutal"] .progress { height: 16px; border: var(--bw) solid var(--border); border-radius: 8px; background: var(--surface); }
[data-theme^="brutal"] .progress > div { background: var(--nb-blue); border-right: var(--bw) solid var(--border); transition: width 400ms cubic-bezier(0.22, 1, 0.36, 1); }
[data-theme^="brutal"] .face .dots i { width: 12px; height: 12px; border: 2px solid var(--border); background: var(--surface); }
[data-theme^="brutal"] .face .dots i.on { background: var(--nb-yellow); }
[data-theme^="brutal"] .face .content { font-weight: 800; letter-spacing: -0.02em; }
[data-theme^="brutal"] .face .content.long { font-weight: 600; letter-spacing: 0; }
[data-theme^="brutal"] .face .content img, [data-theme^="brutal"] .question-box .content img { border: var(--bw) solid var(--border); }
[data-theme^="brutal"] .rate { font-weight: 800; color: #000; }
[data-theme^="brutal"] .rate small { color: #000; }
[data-theme^="brutal"] .rate.again { background: var(--nb-red); border-color: var(--border); color: #000; }
[data-theme^="brutal"] .rate.hard { background: var(--nb-yellow); border-color: var(--border); color: #000; }
[data-theme^="brutal"] .rate.good { background: var(--nb-blue); border-color: var(--border); color: #000; }
[data-theme^="brutal"] .rate.easy { background: var(--surface); border-color: var(--border); color: var(--text); }
[data-theme^="brutal"] .rate.easy small { color: var(--text); }
[data-theme^="brutal"] .rate:hover { background-image: none; }
[data-theme^="brutal"] .rate.again:hover { background: var(--nb-red); } [data-theme^="brutal"] .rate.hard:hover { background: var(--nb-yellow); }
[data-theme^="brutal"] .rate.good:hover { background: var(--nb-blue); } [data-theme^="brutal"] .rate.easy:hover { background: var(--surface); }
[data-theme^="brutal"] .rate.show, [data-theme^="brutal"] .rate.show:hover { background: var(--nb-yellow); color: #000; border-color: var(--border); }
[data-theme^="brutal"] .option { font-weight: 600; }
[data-theme^="brutal"] .option:hover:not(:disabled) { border-color: var(--border); }
[data-theme^="brutal"] .option .k { background: var(--nb-yellow); color: #000; border: 2px solid var(--border); border-radius: 6px; font-family: var(--mono); }
[data-theme^="brutal"] .option.correct { background: var(--nb-blue); color: #000; border-color: var(--border); }
[data-theme^="brutal"] .option.wrong { background: var(--nb-red); color: #000; border-color: var(--border); }
[data-theme^="brutal"] .option:disabled { box-shadow: var(--sh-sm); }
[data-theme^="brutal"] .feedback.ok { background: var(--nb-blue); color: #000; border-color: var(--border); }
[data-theme^="brutal"] .feedback.no { background: var(--nb-red); color: #000; border-color: var(--border); }
[data-theme^="brutal"] .feedback :is(.muted, .small) { color: #000; }
[data-theme^="brutal"] .feedback .btn { background: #fff; color: #000; border-color: #000; box-shadow: 3px 3px 0 #000; }
[data-theme^="brutal"] .diff ins { background: var(--nb-yellow); color: #000; outline: 2px solid #000; }
[data-theme^="brutal"] .diff del { background: #fff; color: #000; outline: 2px solid #000; }
[data-theme^="brutal"] .type-input input { border-radius: var(--radius); }
[data-theme^="brutal"] .tile { font-weight: 700; }
[data-theme^="brutal"] .tile.sel { background: var(--nb-yellow); color: #000; border-color: var(--border); transform: translate(4px, 4px); box-shadow: 0 0 0 var(--border); }
[data-theme^="brutal"] .tile.bad { background: var(--nb-red); color: #000; border-color: var(--border); }
[data-theme^="brutal"] .tile.done { transform: scale(.85) rotate(-3deg); }
[data-theme^="brutal"] .result .score { color: var(--text); font-size: 4rem; }
[data-theme^="brutal"] .result-stats div { background: var(--surface); box-shadow: var(--sh-sm); }
[data-theme^="brutal"] .wrong-list .item { border-bottom: 2px solid var(--border); }
[data-theme^="brutal"] .c-new { color: var(--text); } [data-theme^="brutal"] .c-learn { color: var(--text); } [data-theme^="brutal"] .c-due { color: var(--text); }
[data-theme^="brutal"] .study-meta .cnt { border: 2px solid var(--border); border-radius: 6px; padding: 0 6px; }
[data-theme^="brutal"] .study-meta .c-new { background: var(--nb-blue); color: #000; }
[data-theme^="brutal"] .study-meta .c-learn { background: var(--nb-red); color: #000; }
[data-theme^="brutal"] .study-meta .c-due { background: var(--nb-yellow); color: #000; }

/* Statistik */
[data-theme^="brutal"] .chart rect { stroke: var(--border); stroke-width: 2; }
[data-theme^="brutal"] .chart svg text { fill: var(--text); font-family: var(--mono); font-weight: 600; }
[data-theme^="brutal"] .chart line { stroke: var(--border); stroke-width: 2; }
[data-theme^="brutal"] .heatmap i { border: 1.5px solid var(--border); border-radius: 2px; background: var(--surface); }
[data-theme^="brutal"] .heatmap i[data-l="1"], [data-theme^="brutal"] .heatmap i[data-l="2"] { background: var(--nb-yellow); }
[data-theme^="brutal"] .heatmap i[data-l="3"] { background: var(--nb-blue); }
[data-theme^="brutal"] .heatmap i[data-l="4"] { background: var(--nb-red); }
[data-theme^="brutal"] .tbl th, [data-theme^="brutal"] .tbl td { border-bottom: 2px solid var(--border); }

/* Pengaturan */
[data-theme^="brutal"] .swatch.active { background: var(--nb-yellow); color: #000; border-color: var(--border); }
[data-theme^="brutal"] .swatch .pv { border: 2px solid var(--border); border-radius: 6px; }
[data-theme^="brutal"] .tabs { border: var(--bw) solid var(--border); background: var(--surface); }
[data-theme^="brutal"] .tabs button.active { background: var(--nb-yellow); color: #000; box-shadow: none; }

/* Notifikasi kecil */
[data-theme^="brutal"] .toast { background: var(--nb-yellow); color: #000; border: var(--bw) solid #000; box-shadow: 4px 4px 0 #000; border-radius: 10px; font-weight: 800; animation: nb-slam 250ms cubic-bezier(0.34, 1.7, 0.64, 1); }
[data-theme^="brutal"] .toast.good { background: var(--nb-blue); color: #000; }
[data-theme^="brutal"] .toast.bad { background: var(--nb-red); color: #000; }
[data-theme^="brutal"] .modal { animation: nb-slam 250ms cubic-bezier(0.34, 1.7, 0.64, 1); }
@keyframes nb-slam { from { transform: scale(1.12); } to { transform: scale(1); } }
@media (prefers-reduced-motion: reduce) {
  [data-theme^="brutal"] * { transition: none !important; animation: none !important; }
}
[data-theme^="brutal"] .btn.ghost.sm, [data-theme^="brutal"] .btn.ghost.icon { box-shadow: none; border-width: 2px; }

/* Neobrutal — elemen khusus HP */
[data-theme^="brutal"] .fab { background: var(--nb-yellow); color: #000; border: var(--bw) solid var(--border); border-radius: 16px; box-shadow: var(--sh); }
[data-theme^="brutal"] .fab:active { transform: translate(4px, 4px); box-shadow: 0 0 0 var(--border); }
[data-theme^="brutal"] .seg button { background: var(--surface); color: var(--text); border: var(--bw) solid var(--border); box-shadow: var(--sh-sm); }
[data-theme^="brutal"] .seg button.active { background: var(--nb-yellow); color: #000; transform: translate(3px, 3px); box-shadow: none; }
[data-theme^="brutal"] .chip { border: var(--bw) solid var(--border); font-weight: 700; box-shadow: var(--sh-sm); }
[data-theme^="brutal"] .chip.active { background: var(--nb-yellow); color: #000; border-color: var(--border); transform: translate(3px, 3px); box-shadow: none; }
[data-theme^="brutal"] .modal { border-radius: 20px 20px 0 0; border-bottom: 0; animation: sheet-up .3s cubic-bezier(.34,1.3,.64,1); }
[data-theme^="brutal"] .modal .grabber { background: var(--border); height: 6px; }
[data-theme^="brutal"] .modal footer { border-top: var(--bw) solid var(--border); }
[data-theme^="brutal"] .swipe-row { border-radius: var(--radius); }
[data-theme^="brutal"] .swipe-row .actions button { color: #000; border-left: var(--bw) solid var(--border); }
[data-theme^="brutal"] .swipe-row .act-star { background: var(--nb-yellow); } [data-theme^="brutal"] .swipe-row .act-sus { background: var(--nb-blue); } [data-theme^="brutal"] .swipe-row .act-del { background: var(--nb-red); }
[data-theme^="brutal"] .card-row { box-shadow: none; }
[data-theme^="brutal"] .swipe-row { border: var(--bw) solid var(--border); box-shadow: var(--sh-sm); }
[data-theme^="brutal"] .swipe-row .card-row { border: 0; border-radius: 0; }
[data-theme^="brutal"] .stamp { border-width: var(--bw); color: #000 !important; box-shadow: var(--sh-sm); }
[data-theme^="brutal"] .stamp.right { background: var(--nb-blue); } [data-theme^="brutal"] .stamp.left { background: var(--nb-red); }
[data-theme^="brutal"] .stamp.up { background: #fff; } [data-theme^="brutal"] .stamp.down { background: var(--nb-yellow); }
[data-theme^="brutal"] .topbar { border-bottom: var(--bw) solid var(--border); }
[data-theme^="brutal"] .mainnav a.active { color: #000; }
.study > .panel.result, .study > .panel.empty { overflow-y: auto; flex: 1; min-height: 0; overscroll-behavior: contain; }
.tf-card .face { position: relative; }
.tf-card .face .question-box .content { font-size: 1.3rem; }
.tf-card .face .side-label { position: static; }
.tf-card .face .tools { position: absolute; }
.tf-card .face .stamp { top: 40%; }
.mode .txt b { color: var(--text); }
.mode.featured .txt b { color: var(--text); }
[data-theme^="brutal"] .mode.featured .txt b { color: #000; }
[data-theme^="brutal"] .quick-mode-card { border-width: var(--bw); border-color: var(--border); box-shadow: var(--sh-sm); font-family: inherit; }
[data-theme^="brutal"] .quick-mode-card:hover { transform: translate(-2px, -2px); box-shadow: var(--sh); }
[data-theme^="brutal"] .quick-mode-card:active { transform: translate(3px, 3px); box-shadow: none; }
[data-theme^="brutal"] .quick-mode-card .qm-icon { color: #000; }
[data-theme^="brutal"] .quick-mode-card.featured { background: var(--nb-yellow); color: #000; }
[data-theme^="brutal"] .quick-mode-card.featured span:not(.badge):not(.qm-icon) { color: #222; }
[data-theme^="brutal"] .rate-picker-grid button.rate { border-width: var(--bw); color: #000 !important; box-shadow: var(--sh-sm); }
[data-theme^="brutal"] .rate-picker-grid button.rate.again { background: var(--nb-red); }
[data-theme^="brutal"] .rate-picker-grid button.rate.hard { background: var(--nb-yellow); }
[data-theme^="brutal"] .rate-picker-grid button.rate.good { background: var(--nb-blue); }
[data-theme^="brutal"] .rate-picker-grid button.rate.easy { background: #fff; }
[data-theme^="brutal"] .theme-more-toggle summary { border-width: var(--bw); box-shadow: var(--sh-sm); }