/**
 * Tafaqquh Design System — canonical learner-facing foundation.
 *
 * Komponen baharu mesti menggunakan token/kelas `tfd-*` di sini. Helaian lama
 * kekal sementara untuk halaman yang belum dipindahkan dalam fasa berikutnya.
 */
:root {
  color-scheme: light;

  --tfd-navy: #0F3D5E;
  --tfd-navy-strong: #0B3350;
  --tfd-blue: #3B82F6;
  --tfd-blue-strong: #1D4ED8;
  --tfd-blue-soft: #EAF4FF;
  /* Adult learning surfaces: opt-in roles, no change to existing component defaults. */
  --tfd-learning-action: #1D4ED8;
  --tfd-learning-action-hover: #173FAE;
  --tfd-learning-canvas: #F1F6FD;
  --tfd-learning-line: #CFDEEF;
  --tfd-learning-teal: #08776D;
  --tfd-learning-teal-soft: #E6F5F1;
  --tfd-learning-book: #FFF8E8;
  --tfd-learning-book-ink: #77560D;
  --tfd-learning-sky: #EAF4FF;
  --tfd-learning-aqua: #E5F8F7;
  --tfd-learning-cyan: #09677B;
  /* Same interlaced geometry as index.html .geo-surface, at hero scale. */
  --tfd-learning-pattern-line: rgba(255,255,255,.68);
  --tfd-learning-pattern:
    linear-gradient(22.5deg,transparent 33%,var(--tfd-learning-pattern-line) 33%,var(--tfd-learning-pattern-line) 36%,transparent 36%,transparent 64%,var(--tfd-learning-pattern-line) 64%,var(--tfd-learning-pattern-line) 67%,transparent 67%),
    linear-gradient(-22.5deg,transparent 33%,var(--tfd-learning-pattern-line) 33%,var(--tfd-learning-pattern-line) 36%,transparent 36%,transparent 64%,var(--tfd-learning-pattern-line) 64%,var(--tfd-learning-pattern-line) 67%,transparent 67%),
    linear-gradient(112.5deg,transparent 33%,var(--tfd-learning-pattern-line) 33%,var(--tfd-learning-pattern-line) 36%,transparent 36%,transparent 64%,var(--tfd-learning-pattern-line) 64%,var(--tfd-learning-pattern-line) 67%,transparent 67%),
    linear-gradient(-112.5deg,transparent 33%,var(--tfd-learning-pattern-line) 33%,var(--tfd-learning-pattern-line) 36%,transparent 36%,transparent 64%,var(--tfd-learning-pattern-line) 64%,var(--tfd-learning-pattern-line) 67%,transparent 67%);
  --tfd-gold: #E7B43C;
  --tfd-gold-ink: #7A570B;
  --tfd-cream: #FFF9EF;
  --tfd-surface: #FFFFFF;
  --tfd-canvas: #F7FAFE;
  --tfd-text: #172033;
  --tfd-text-muted: #6B7280;
  --tfd-border: #E5EAF0;
  --tfd-success: #4CAF6A;
  --tfd-success-soft: #EDF9F1;
  --tfd-error: #E96B6B;
  --tfd-error-soft: #FFF1F1;
  --tfd-warning: #B7791F;
  --tfd-warning-soft: #FFF7E6;

  --tfd-font-ui: "Plus Jakarta Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --tfd-font-formal: "Source Serif 4", Georgia, serif;
  --tfd-text-display: clamp(2rem, 4vw, 3.5rem);
  --tfd-text-h1: clamp(1.75rem, 3vw, 2rem);
  --tfd-text-h2: clamp(1.375rem, 2.4vw, 1.625rem);
  --tfd-text-h3: clamp(1.125rem, 1.8vw, 1.25rem);
  --tfd-text-body: 1rem;
  --tfd-text-small: .875rem;
  --tfd-text-caption: .8125rem;
  --tfd-leading-tight: 1.2;
  --tfd-leading-body: 1.6;

  --tfd-space-1: 4px;
  --tfd-space-2: 8px;
  --tfd-space-3: 12px;
  --tfd-space-4: 16px;
  --tfd-space-5: 20px;
  --tfd-space-6: 24px;
  --tfd-space-7: 32px;
  --tfd-space-8: 40px;
  --tfd-space-9: 48px;
  --tfd-space-10: 64px;
  /* Langkah rehat seksyen. Halaman sedia ada menggunakan padding 104px yang
     tiada dalam skala; 96px ialah nilai terdekat yang kekal pada skala 8px.
     Tanpa langkah ini, setiap rehat besar terpaksa ditaip sebagai px mentah. */
  --tfd-space-11: 96px;

  /* Jejari cip dan lencana kecil sahaja. Pada 8px ia kelihatan berat pada
     elemen setinggi ~24px; nilai ini merasmikan corak 6px yang sudah
     digunakan meluas. Kad kekal pada --tfd-radius-lg. */
  /* Gerakan dan ikon: satu keluarga untuk dashboard, ruang belajar dan navigasi.
     Ikon ialah SVG garisan 24px, stroke 1.7, hujung bulat (tfd_ikon / tfd-icons.js). */
  --tfd-motion-icon: 260ms;
  --tfd-motion-tab: 200ms;
  --tfd-motion-drawer: 240ms;
  --tfd-motion-feedback: 220ms;
  --tfd-motion-shimmer: 3.2s;
  --tfd-ease-inout: cubic-bezier(.4, 0, .2, 1);
  --tfd-icon-stroke: 1.7;
  --tfd-icon-nav: 22px;
  --tfd-icon-tab: 21px;
  --tfd-icon-inline: 18px;
  --tfd-icon-feature: 48px;
  --tfd-learning-pattern-gold: rgba(246, 215, 141, .34);
  /* Varian emas corak yang sama, untuk kepala drawer kitab (lihat .hero.geo-surface landing). */
  --tfd-learning-pattern-kitab:
    linear-gradient(22.5deg,transparent 33%,var(--tfd-learning-pattern-gold) 33%,var(--tfd-learning-pattern-gold) 36%,transparent 36%,transparent 64%,var(--tfd-learning-pattern-gold) 64%,var(--tfd-learning-pattern-gold) 67%,transparent 67%),
    linear-gradient(-22.5deg,transparent 33%,var(--tfd-learning-pattern-gold) 33%,var(--tfd-learning-pattern-gold) 36%,transparent 36%,transparent 64%,var(--tfd-learning-pattern-gold) 64%,var(--tfd-learning-pattern-gold) 67%,transparent 67%),
    linear-gradient(112.5deg,transparent 33%,var(--tfd-learning-pattern-gold) 33%,var(--tfd-learning-pattern-gold) 36%,transparent 36%,transparent 64%,var(--tfd-learning-pattern-gold) 64%,var(--tfd-learning-pattern-gold) 67%,transparent 67%),
    linear-gradient(-112.5deg,transparent 33%,var(--tfd-learning-pattern-gold) 33%,var(--tfd-learning-pattern-gold) 36%,transparent 36%,transparent 64%,var(--tfd-learning-pattern-gold) 64%,var(--tfd-learning-pattern-gold) 67%,transparent 67%);
  --tfd-radius-xs: 6px;
  --tfd-radius-sm: 8px;
  --tfd-radius-md: 12px;
  --tfd-radius-lg: 16px;
  --tfd-shadow-card: 0 1px 2px rgba(15, 61, 94, .06);
  --tfd-shadow-elevated: 0 10px 28px rgba(15, 61, 94, .10);
  --tfd-shadow-modal: 0 24px 64px rgba(15, 61, 94, .20);
  /* Bayang kad lembut & luas untuk komposisi "app-like" pada kanvas cerah. */
  --tfd-shadow-soft: 0 6px 20px rgba(15, 61, 94, .07);
  --tfd-radius-xl: 20px;
  /* Tangga jejari rasmi phone-shell (elak 14/18/22/28 rawak):
     sm 8 = lencana/cip kecil · md 12 = input, butang ikon, kawalan segmen ·
     lg 16 = baris senarai, kad padat · xl 20 = kad utama/profil/kemajuan ·
     2xl 24 = penjuru atas bottom sheet / modal besar sahaja. */
  --tfd-radius-2xl: 24px;
  --tfd-focus: 0 0 0 3px rgba(59, 130, 246, .24);
  --tfd-control-height: 48px;
  --tfd-content: 1120px;
  --tfd-content-wide: 1280px;
  --tfd-content-reading: 760px;
  --tfd-gutter: 16px;

  /* --------------------------------------------------------------------
     GERAK (motion) — dikongsi shell aplikasi & komponen learner.
     Gerak mesti menyampaikan keadaan, bukan menghias. Blok
     prefers-reduced-motion di hujung fail melumpuhkan setiap keyframe
     di sini. */
  --tfd-ease-out: cubic-bezier(.22, .61, .36, 1);
  --tfd-ease-spring: cubic-bezier(.2, .9, .3, 1.2);
  --tfd-dur-tap: 100ms;      /* = --tfd-dur-press */
  --tfd-dur-modal: 300ms;    /* sheet/dialog 280–350ms */
  --tfd-dur-progress: 600ms;

  /* --------------------------------------------------------------------
     WARNA SEMANTIK — makna tetap merentas skrin. Nilai dipetakan kepada
     palet sedia ada supaya rupa tidak berubah; ia cuma dinamakan mengikut
     peranan. Selesai = --tfd-success. */
  --tfd-live: #E0574F;
  --tfd-live-soft: #FFF1F0;
  --tfd-live-ink: #8A2E28;
  --tfd-milestone: var(--tfd-gold);
  --tfd-milestone-soft: var(--tfd-cream);
  --tfd-qa: #7C6CD6;
  --tfd-qa-soft: #F3F1FC;
  --tfd-qa-ink: #4B3FA6;
  --tfd-locked: #9AA3AE;

  /* Titik putus kanonikal — lihat nota di bawah sebelum menggunakannya. */
  --tfd-bp-sm: 480px;
  --tfd-bp-md: 768px;
  --tfd-bp-lg: 900px;
  --tfd-bp-xl: 1120px;

  /* --------------------------------------------------------------------
     SISTEM INTERAKSI v1 (docs/tafaqquh-interaction-design-system.md)
     Warna semantik: navy = identiti, royal = tindakan/dipilih, sky = permukaan,
     teal = kejayaan/kemajuan, emas = kitab/rujukan, ungu = Tanya Ustaz sahaja,
     coral = live/ralat sahaja, hijau = WhatsApp sahaja. */
  --tfd-royal: #1D4ED8;
  --tfd-royal-soft: #DCE8FB;
  --tfd-sky: #EAF4FF;
  --tfd-sky-line: #CFE0F5;
  --tfd-teal: #0E8C80;
  --tfd-teal-soft: #E3F6F3;
  --tfd-teal-ink: #075E57;
  --tfd-gold-soft: #FFF4D9;
  --tfd-purple: var(--tfd-qa);
  --tfd-purple-soft: var(--tfd-qa-soft);
  --tfd-purple-ink: var(--tfd-qa-ink);
  --tfd-whatsapp: #12813C;

  /* Tangga jejari: kawalan 12 · butang 14 · kad 20 · hero 24 · sheet 28. */
  --tfd-r-control: 12px;
  --tfd-r-button: 14px;
  --tfd-r-card: 20px;
  --tfd-r-hero: 24px;
  --tfd-r-sheet: 28px;

  /* Tiga aras bayang sahaja, semuanya biru-kelabu lembut dengan offset. */
  --tfd-elev-surface: 0 1px 2px rgba(15, 61, 94, .05), 0 2px 8px rgba(15, 61, 94, .05);
  --tfd-elev-interactive: 0 6px 18px rgba(15, 61, 94, .10), 0 1px 3px rgba(15, 61, 94, .06);
  --tfd-elev-floating: 0 18px 44px rgba(15, 61, 94, .20), 0 4px 12px rgba(15, 61, 94, .08);

  /* Gerak: tekan 100 · pilih 160 · maklum balas 300 · modal 300 · halaman 220. */
  --tfd-dur-press: 100ms;
  --tfd-dur-select: 160ms;
  --tfd-dur-feedback: 300ms;
  --tfd-dur-page: 220ms;
  --tfd-scale-press: .975;
}

/**
 * TITIK PUTUS KANONIKAL
 *
 *   --tfd-bp-sm    480px    telefon besar
 *   --tfd-bp-md    768px    tablet; gutter bertukar 16px -> 24px di sini
 *   --tfd-bp-lg    900px    shell aplikasi bertukar kepada susun atur desktop
 *   --tfd-bp-xl   1120px    sepadan dengan --tfd-content
 *
 * Custom property TIDAK boleh digunakan dalam syarat media query — tulisan
 * `@media (min-width: var(--tfd-bp-md))` tidak sah dan senyap gagal. Nilai di
 * atas mesti ditaip sebagai literal:
 *
 *   @media (min-width: 768px) { ... }
 *
 * Property tersebut wujud supaya JavaScript boleh membaca nilai yang sama
 * (`getComputedStyle(document.documentElement).getPropertyValue('--tfd-bp-md')`)
 * dan supaya terdapat satu tempat rujukan tunggal apabila nilai berubah.
 *
 * Fail lain kini menggunakan 15 titik putus berbeza (389, 420, 480, 560, 640,
 * 680, 700, 720, 767, 768, 860, 899, 900, 1000, 1080). Ia SENGAJA dibiarkan
 * buat masa ini; penyatuan berlaku dalam Fasa 4, halaman demi halaman.
 * Komponen baharu mesti menggunakan empat nilai di atas sahaja.
 */

@media (min-width: 768px) {
  :root { --tfd-gutter: 24px; }
}

.tfd-container,
.tfd-container--wide,
.tfd-container--reading {
  width: min(100% - (2 * var(--tfd-gutter)), var(--tfd-content));
  margin-inline: auto;
}
.tfd-container--wide { max-width: var(--tfd-content-wide); }
.tfd-container--reading { max-width: var(--tfd-content-reading); }
.tfd-section { margin-block: var(--tfd-space-8); }
.tfd-stack { display: grid; gap: var(--tfd-space-4); }
.tfd-cluster { display: flex; flex-wrap: wrap; gap: var(--tfd-space-3); align-items: center; }
.tfd-grid { display: grid; gap: var(--tfd-space-5); grid-template-columns: repeat(auto-fit, minmax(min(100%, 260px), 1fr)); }
.tfd-layout-context { display: grid; gap: var(--tfd-space-6); }
.tfd-layout-media { display: grid; gap: var(--tfd-space-6); }
@media (min-width: 900px) {
  .tfd-layout-context { grid-template-columns: minmax(210px, 260px) minmax(0, 1fr); }
  .tfd-layout-media { grid-template-columns: minmax(0, 1fr) minmax(280px, 360px); }
}

.tfd-display,.tfd-h1,.tfd-h2,.tfd-h3 { margin: 0; color: var(--tfd-navy); line-height: var(--tfd-leading-tight); text-wrap: balance; }
.tfd-display { font-size: var(--tfd-text-display); letter-spacing: -.03em; }
.tfd-h1 { font-size: var(--tfd-text-h1); letter-spacing: -.025em; }
.tfd-h2 { font-size: var(--tfd-text-h2); letter-spacing: -.02em; }
.tfd-h3 { font-size: var(--tfd-text-h3); }
.tfd-body { margin: 0; color: var(--tfd-text); font: 400 var(--tfd-text-body)/var(--tfd-leading-body) var(--tfd-font-ui); }
.tfd-small { font-size: var(--tfd-text-small); line-height: 1.55; }
.tfd-caption { color: var(--tfd-text-muted); font-size: var(--tfd-text-caption); line-height: 1.45; }

.tfd-link { color: var(--tfd-blue-strong); font-weight: 650; text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 3px; }
.tfd-link:hover { color: var(--tfd-navy); }
.tfd-link:focus-visible { border-radius: var(--tfd-radius-sm); outline: 0; box-shadow: var(--tfd-focus); }

.tfd-btn {
  min-height: var(--tfd-control-height); padding: 10px var(--tfd-space-5);
  display: inline-flex; align-items: center; justify-content: center; gap: var(--tfd-space-2);
  border: 1px solid transparent; border-radius: var(--tfd-radius-md);
  font: 700 .9375rem/1.2 var(--tfd-font-ui); text-decoration: none; cursor: pointer;
  transition: background-color .16s ease, border-color .16s ease, color .16s ease, transform .16s ease;
}
.tfd-btn--primary { background: var(--tfd-blue); color: #fff; font-size: 1.1875rem; }
.tfd-btn--primary:hover { background: var(--tfd-blue-strong); }
.tfd-btn--secondary { background: var(--tfd-surface); border-color: var(--tfd-border); color: var(--tfd-navy); }
.tfd-btn--secondary:hover { border-color: var(--tfd-blue); color: var(--tfd-blue-strong); }
.tfd-btn--tertiary { min-height: var(--tfd-control-height); padding-inline: var(--tfd-space-3); background: transparent; color: var(--tfd-blue-strong); }
.tfd-btn--danger { background: var(--tfd-error); color: #fff; }
.tfd-btn--icon { width: var(--tfd-control-height); min-width: var(--tfd-control-height); min-height: var(--tfd-control-height); padding: 0; }
.tfd-btn--block { width: 100%; }
.tfd-btn:active:not(:disabled):not([aria-disabled="true"]) { transform: translateY(1px); }
.tfd-btn:focus-visible { outline: 0; box-shadow: var(--tfd-focus); }
.tfd-btn:disabled,.tfd-btn[aria-disabled="true"] { opacity: .55; cursor: not-allowed; transform: none; }
.tfd-btn[aria-busy="true"] { cursor: wait; }
.tfd-btn[aria-busy="true"]::before { content: ""; width: 16px; height: 16px; border: 2px solid currentColor; border-inline-end-color: transparent; border-radius: 50%; animation: tfd-spin .7s linear infinite; }

.tfd-field { display: grid; gap: var(--tfd-space-2); }
.tfd-label { color: var(--tfd-text); font-size: var(--tfd-text-small); font-weight: 700; }
.tfd-input,.tfd-select,.tfd-textarea,.tfd-search {
  width: 100%; min-height: var(--tfd-control-height); padding: 11px var(--tfd-space-3);
  border: 1px solid var(--tfd-border); border-radius: var(--tfd-radius-md);
  background: var(--tfd-surface); color: var(--tfd-text); font: 400 1rem/1.4 var(--tfd-font-ui);
}
.tfd-textarea { min-height: 120px; resize: vertical; }
.tfd-input::placeholder,.tfd-textarea::placeholder,.tfd-search::placeholder { color: #7B8491; }
.tfd-input:focus,.tfd-select:focus,.tfd-textarea:focus,.tfd-search:focus { border-color: var(--tfd-blue); outline: 0; box-shadow: var(--tfd-focus); }
.tfd-input[aria-invalid="true"],.tfd-select[aria-invalid="true"],.tfd-textarea[aria-invalid="true"] { border-color: var(--tfd-error); }
.tfd-input:disabled,.tfd-select:disabled,.tfd-textarea:disabled { background: #F1F4F7; color: var(--tfd-text-muted); cursor: not-allowed; }
.tfd-help,.tfd-field-error { margin: 0; font-size: var(--tfd-text-caption); line-height: 1.45; }
.tfd-help { color: var(--tfd-text-muted); }
.tfd-field-error { color: #B4232E; font-weight: 600; }
.tfd-check,.tfd-radio { display: inline-flex; min-height: var(--tfd-control-height); align-items: center; gap: var(--tfd-space-2); color: var(--tfd-text); }
.tfd-check input,.tfd-radio input { width: 20px; height: 20px; accent-color: var(--tfd-blue); }

.tfd-answer {
  width: 100%; min-height: 52px; padding: var(--tfd-space-3) var(--tfd-space-4);
  display: flex; align-items: center; gap: var(--tfd-space-3); text-align: start;
  border: 1px solid var(--tfd-border); border-radius: var(--tfd-radius-md);
  background: var(--tfd-surface); color: var(--tfd-text); font: 600 1rem/1.45 var(--tfd-font-ui); cursor: pointer;
}
.tfd-answer:hover { border-color: #AFCBF6; }
.tfd-answer[aria-checked="true"],.tfd-answer.is-selected { border-color: var(--tfd-blue); background: var(--tfd-blue-soft); }
.tfd-answer.is-correct { border-color: var(--tfd-success); background: var(--tfd-success-soft); }
.tfd-answer.is-incorrect { border-color: var(--tfd-error); background: var(--tfd-error-soft); }
.tfd-answer:focus-visible { outline: 0; box-shadow: var(--tfd-focus); }
.tfd-answer:disabled,.tfd-answer[aria-disabled="true"] { opacity: .6; cursor: not-allowed; }

.tfd-card { padding: var(--tfd-space-5); border: 1px solid var(--tfd-border); border-radius: var(--tfd-radius-lg); background: var(--tfd-surface); box-shadow: var(--tfd-shadow-card); }
.tfd-card--learning,.tfd-card--continue,.tfd-card--schedule,.tfd-card--progress,.tfd-card--book,.tfd-card--recommendation { display: grid; gap: var(--tfd-space-3); }
.tfd-card--continue { border-color: #CFE2FA; }
.tfd-card--schedule,.tfd-card--recommendation { background: var(--tfd-blue-soft); }
.tfd-card--book { background: var(--tfd-cream); border-color: #F0E2C4; }
.tfd-card--elevated { box-shadow: var(--tfd-shadow-elevated); }
.tfd-card__eyebrow { color: var(--tfd-text-muted); font-size: var(--tfd-text-caption); font-weight: 700; letter-spacing: .04em; }
.tfd-card__title { margin: 0; color: var(--tfd-navy); font-size: var(--tfd-text-h3); line-height: 1.35; }
.tfd-card__meta { display: flex; flex-wrap: wrap; gap: var(--tfd-space-2) var(--tfd-space-4); color: var(--tfd-text-muted); font-size: var(--tfd-text-caption); }
.tfd-card__description { margin: 0; color: var(--tfd-text-muted); font-size: var(--tfd-text-small); line-height: 1.6; }
.tfd-card__thumb { width: 100%; aspect-ratio: 16/9; object-fit: cover; border-radius: var(--tfd-radius-md); background: var(--tfd-blue-soft); }

.tfd-progress { display: grid; gap: var(--tfd-space-2); }
.tfd-progress__meta { display: flex; justify-content: space-between; gap: var(--tfd-space-3); color: var(--tfd-text-muted); font-size: var(--tfd-text-caption); }
.tfd-progress__track { height: 8px; overflow: hidden; border-radius: var(--tfd-radius-sm); background: #E8EDF3; }
/* Pengisian berasaskan transform (bukan width) supaya animasi tidak memaksa
   susun atur semula. Pengeluar menetapkan --tfd-progress-x sebagai pecahan 0–1. */
.tfd-progress__bar { display: block; height: 100%; width: 100%; border-radius: inherit; background: var(--tfd-blue); transform: scaleX(var(--tfd-progress-x, 0)); transform-origin: left center; transition: transform .5s var(--tfd-ease-out); }

.tfd-chip { min-height: 32px; padding: 5px 10px; display: inline-flex; align-items: center; gap: 6px; border: 1px solid var(--tfd-border); border-radius: var(--tfd-radius-sm); background: var(--tfd-surface); color: var(--tfd-text-muted); font-size: var(--tfd-text-caption); font-weight: 700; }
.tfd-chip--active,.tfd-chip[aria-selected="true"] { border-color: var(--tfd-blue); background: var(--tfd-blue-soft); color: var(--tfd-blue-strong); }
.tfd-chip--live { border-color: #F3B2B2; background: var(--tfd-error-soft); color: #B4232E; }
.tfd-chip--success { border-color: #B9DFC4; background: var(--tfd-success-soft); color: #2C7A47; }
.tfd-chip--gold { border-color: #ECD18D; background: var(--tfd-cream); color: var(--tfd-gold-ink); }

.tfd-tabs { display: flex; gap: var(--tfd-space-2); overflow-x: auto; padding-block: var(--tfd-space-1); scrollbar-width: thin; }
.tfd-tab { min-height: var(--tfd-control-height); padding: 8px var(--tfd-space-4); flex: none; border: 0; border-bottom: 2px solid transparent; background: transparent; color: var(--tfd-text-muted); font: 650 var(--tfd-text-small)/1.3 var(--tfd-font-ui); text-decoration: none; }
.tfd-tab[aria-selected="true"],.tfd-tab[aria-current="page"] { border-bottom-color: var(--tfd-blue); color: var(--tfd-navy); }
.tfd-tab:focus-visible { border-radius: var(--tfd-radius-sm); outline: 0; box-shadow: var(--tfd-focus); }

.tfd-breadcrumb { display: flex; flex-wrap: wrap; align-items: center; gap: var(--tfd-space-2); color: var(--tfd-text-muted); font-size: var(--tfd-text-small); }
.tfd-breadcrumb a { color: var(--tfd-blue-strong); }
.tfd-breadcrumb [aria-current="page"] { color: var(--tfd-text); font-weight: 650; }
.tfd-breadcrumb__separator { color: #A2AAB5; }
.tfd-breadcrumb__back { display: none; min-height: var(--tfd-control-height); align-items: center; }
@media (max-width: 767px) {
  .tfd-breadcrumb > :not(.tfd-breadcrumb__back):not(:nth-last-child(-n+2)) { display: none; }
  .tfd-breadcrumb__back { display: inline-flex; }
}

.tfd-sidebar { min-width: 0; }
.tfd-sidebar__inner { display: grid; gap: var(--tfd-space-2); }
.tfd-sidebar__title { margin: 0 0 var(--tfd-space-2); color: var(--tfd-navy); font-size: var(--tfd-text-small); }
.tfd-sidebar__link { min-height: var(--tfd-control-height); padding: 10px var(--tfd-space-3); display: flex; align-items: center; justify-content: space-between; gap: var(--tfd-space-2); border-radius: var(--tfd-radius-md); color: var(--tfd-text); text-decoration: none; }
.tfd-sidebar__link:hover,.tfd-sidebar__link[aria-current="page"] { background: var(--tfd-blue-soft); color: var(--tfd-navy); }
.tfd-sidebar__meta { color: var(--tfd-text-muted); font-size: var(--tfd-text-caption); }
@media (min-width: 900px) { .tfd-sidebar--sticky .tfd-sidebar__inner { position: sticky; top: var(--tfd-space-6); } }
@media (max-width: 899px) { .tfd-sidebar { display: none; } }

.tfd-feedback { padding: var(--tfd-space-4); display: grid; grid-template-columns: auto minmax(0,1fr); gap: var(--tfd-space-3); border: 1px solid var(--tfd-border); border-radius: var(--tfd-radius-md); color: var(--tfd-text); }
.tfd-feedback--info { border-color: #CFE2FA; background: var(--tfd-blue-soft); }
.tfd-feedback--success { border-color: #B9DFC4; background: var(--tfd-success-soft); }
.tfd-feedback--error { border-color: #F3B2B2; background: var(--tfd-error-soft); }
.tfd-feedback--warning { border-color: #EBCB91; background: var(--tfd-warning-soft); }
.tfd-feedback__title { margin: 0; font-weight: 750; }
.tfd-feedback__body { margin: 3px 0 0; font-size: var(--tfd-text-small); line-height: 1.55; }

.tfd-empty,.tfd-error-state { padding: var(--tfd-space-8) var(--tfd-space-5); display: grid; justify-items: center; gap: var(--tfd-space-3); text-align: center; border: 1px dashed var(--tfd-border); border-radius: var(--tfd-radius-lg); background: var(--tfd-surface); }
.tfd-empty__icon,.tfd-error-state__icon { width: 44px; height: 44px; display: grid; place-items: center; color: var(--tfd-navy); }
.tfd-empty p,.tfd-error-state p { max-width: 52ch; margin: 0; color: var(--tfd-text-muted); line-height: 1.55; }
.tfd-inline-loading { display: inline-flex; min-height: 44px; align-items: center; gap: var(--tfd-space-2); color: var(--tfd-text-muted); font-size: var(--tfd-text-small); }
.tfd-skeleton { border-radius: var(--tfd-radius-sm); background: linear-gradient(100deg,#EDF1F5 25%,#F8FAFC 45%,#EDF1F5 65%); background-size: 220% 100%; animation: tfd-shimmer 1.4s ease-in-out infinite; color: transparent; }

.tfd-dialog { width: min(100% - 32px, 560px); max-height: min(84vh, 760px); padding: 0; overflow: auto; border: 0; border-radius: var(--tfd-radius-lg); background: var(--tfd-surface); color: var(--tfd-text); box-shadow: var(--tfd-shadow-modal); }
.tfd-dialog::backdrop { background: rgba(11, 51, 80, .52); }
.tfd-dialog__header,.tfd-dialog__body,.tfd-dialog__actions { padding: var(--tfd-space-5); }
.tfd-dialog__header { display: flex; align-items: center; justify-content: space-between; gap: var(--tfd-space-4); border-bottom: 1px solid var(--tfd-border); }
.tfd-dialog__body { line-height: var(--tfd-leading-body); }
.tfd-dialog__actions { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: var(--tfd-space-3); border-top: 1px solid var(--tfd-border); }
.tfd-sheet { width: min(100%, 680px); max-height: min(85vh, 760px); margin: auto auto 0; padding: 0 0 env(safe-area-inset-bottom); border: 0; border-radius: var(--tfd-radius-lg) var(--tfd-radius-lg) 0 0; background: var(--tfd-surface); color: var(--tfd-text); box-shadow: var(--tfd-shadow-modal); }
.tfd-sheet::backdrop { background: rgba(11, 51, 80, .52); }
.tfd-sheet__handle { width: 40px; height: 4px; margin: 10px auto 0; border-radius: var(--tfd-radius-sm); background: #CBD3DC; }
.tfd-sheet__body { padding: var(--tfd-space-5); overflow: auto; }

.tfd-brand { display: inline-flex; min-height: var(--tfd-control-height); align-items: center; gap: var(--tfd-space-3); color: var(--tfd-navy); font-family: var(--tfd-font-ui); font-weight: 750; text-decoration: none; }
.tfd-brand img,.tfd-brand__mark { width: 34px; height: 34px; flex: none; object-fit: contain; }
@media (min-width: 900px) { .tfd-brand img,.tfd-brand__mark { width: 40px; height: 40px; } }

/* Representative adapters. These prove the foundation without migrating pages. */
.mod .m-borang.tfd-card { border-color: var(--tfd-border); border-radius: var(--tfd-radius-lg); box-shadow: var(--tfd-shadow-elevated); }
.mod .m-medan.tfd-field { gap: var(--tfd-space-2); }
.mod .m-input.tfd-input { min-height: var(--tfd-control-height); border-radius: var(--tfd-radius-md); font-size: 1rem; }
.mod .m-btn.tfd-btn { min-height: var(--tfd-control-height); border-radius: var(--tfd-radius-md); }
.mod .m-btn--utama.tfd-btn--primary { background: var(--tfd-blue); color: #fff; }
.app-resume.tfd-card { padding: 0; border-color: var(--tfd-border); box-shadow: var(--tfd-shadow-card); }

@media (max-width: 420px) {
  .mod-app .m-borang.tfd-card {
    width: 100%;
    max-width: 100%;
    padding: var(--tfd-space-4);
  }
  .mod-app .m-tukar {
    overflow-wrap: anywhere;
  }
}
.app-level-row.tfd-learning-row { min-height: 72px; }
.app-level-row.tfd-learning-row:focus-visible { outline: 0; box-shadow: inset var(--tfd-focus); }

@keyframes tfd-spin { to { transform: rotate(360deg); } }
@keyframes tfd-shimmer { to { background-position-x: -220%; } }

/* Gerak dikongsi — lihat token --tfd-dur-* / --tfd-ease-*. */
@keyframes tfd-pop {
  0% { transform: scale(1); }
  45% { transform: scale(1.06); }
  100% { transform: scale(1); }
}
@keyframes tfd-draw-check {
  from { stroke-dashoffset: var(--tfd-check-len, 28); }
  to { stroke-dashoffset: 0; }
}
@keyframes tfd-ring-pulse {
  0% { transform: scale(.6); opacity: .55; }
  70% { transform: scale(1.9); opacity: 0; }
  100% { transform: scale(1.9); opacity: 0; }
}
@keyframes tfd-rise {
  from { transform: translateY(12px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}
@keyframes tfd-progress-fill {
  from { transform: scaleX(0); }
  to { transform: scaleX(1); }
}

@media (prefers-reduced-motion: reduce) {
  .tfd-btn,.tfd-answer { transition: none; }
  .tfd-btn[aria-busy="true"]::before,.tfd-skeleton { animation-duration: .01ms; animation-iteration-count: 1; }
  /* Setiap keyframe dikongsi di atas: jalankan sekali, hampir serta-merta. */
  [class*="tfd-"],
  [class*="app-"] {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
  }
}
@media (forced-colors: active) {
  .tfd-btn,.tfd-answer,.tfd-chip,.tfd-card,.tfd-input,.tfd-select,.tfd-textarea { border: 1px solid ButtonText; }
}

/* ==========================================================================
   SEMAKAN KEFAHAMAN
   ==========================================================================
   Satu soalan pada satu masa. Bekas lebar-bacaan pada desktop: soalan yang
   merentang 1200px memaksa mata mengembara, dan menyemak kefahaman ialah
   tugas membaca sebelum ia tugas menjawab.

   Keadaan jawapan TIDAK bergantung pada warna sahaja — setiap satu membawa
   ikon dalam .tfd-answer__state dan teks pembaca skrin. */

.tfd-quiz { display: grid; gap: var(--tfd-space-5); }

.tfd-quiz__entry {
  padding: var(--tfd-space-5);
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
  gap: var(--tfd-space-4);
  border: 1px solid #CFE2FA; border-radius: var(--tfd-radius-lg);
  background: var(--tfd-blue-soft);
}
.tfd-quiz__entry h2 { margin: 0; font-size: 1.15rem; }
.tfd-quiz__entry p { margin: 4px 0 0; color: var(--tfd-text-muted); font-size: var(--tfd-text-small); }

.tfd-quiz__flow,
.tfd-quiz__result {
  max-width: var(--tfd-content-reading);
  padding: var(--tfd-space-5);
  border: 1px solid var(--tfd-border); border-radius: var(--tfd-radius-lg);
  background: var(--tfd-surface); box-shadow: var(--tfd-shadow-card);
}

.tfd-quiz__progress { display: grid; gap: var(--tfd-space-2); margin-bottom: var(--tfd-space-5); }
.tfd-quiz__progress > span { color: var(--tfd-text-muted); font-size: var(--tfd-text-small); font-weight: 600; }

.tfd-quiz__question h3 { margin: 0 0 var(--tfd-space-4); font-size: 1.1rem; line-height: 1.45; }
.tfd-quiz__options { display: grid; gap: var(--tfd-space-3); }

.tfd-answer__key {
  flex: none; width: 28px; height: 28px; display: grid; place-items: center;
  border-radius: 8px; background: var(--tfd-blue-soft); color: var(--tfd-navy);
  font-size:var(--tfd-text-caption); font-weight: 700;
}
.tfd-answer__text { flex: 1; min-width: 0; font-weight: 500; }
.tfd-answer__state { flex: none; width: 22px; height: 22px; display: grid; place-items: center; }
.tfd-answer__state svg { width: 20px; height: 20px; }
.tfd-answer.is-correct .tfd-answer__key { background: var(--tfd-success-soft); }
.tfd-answer.is-correct .tfd-answer__state { color: var(--tfd-success); }
.tfd-answer.is-incorrect .tfd-answer__key { background: var(--tfd-error-soft); }
.tfd-answer.is-incorrect .tfd-answer__state { color: var(--tfd-error); }

.tfd-quiz__question .tfd-feedback { margin-top: var(--tfd-space-4); }
.tfd-feedback__mark { width: 24px; height: 24px; display: grid; place-items: center; }
.tfd-feedback__mark svg { width: 22px; height: 22px; }
.tfd-feedback--success .tfd-feedback__mark { color: var(--tfd-success); }
.tfd-feedback--error .tfd-feedback__mark { color: var(--tfd-error); }
.tfd-feedback__answer { margin: 3px 0 0; font-size: var(--tfd-text-small); font-weight: 600; }
.tfd-feedback__reference { margin: 6px 0 0; color: var(--tfd-text-muted); font-size: var(--tfd-text-caption); }

.tfd-quiz__actions {
  margin-top: var(--tfd-space-5);
  display: flex; flex-wrap: wrap; align-items: center; gap: var(--tfd-space-3);
}

.tfd-quiz__result { text-align: center; }
.tfd-quiz__result h2 { margin: 0 0 var(--tfd-space-3); }
.tfd-quiz__score { margin: 0; font-size: 1.6rem; }
.tfd-quiz__score strong { color: var(--tfd-navy); }
.tfd-quiz__result > p + p { margin: 6px 0 0; color: var(--tfd-text-muted); }
.tfd-quiz__result .tfd-quiz__actions { justify-content: center; }
.tfd-quiz__result .tfd-feedback { margin-top: var(--tfd-space-4); text-align: start; }

/* Telefon: pilihan penuh-lebar, dan butang tindakan tidak boleh berkongsi baris
   sempit yang memecahkan sasaran 48px. */
@media (max-width: 560px) {
  .tfd-quiz__flow, .tfd-quiz__result { padding: var(--tfd-space-4); }
  .tfd-quiz__entry { flex-direction: column; align-items: stretch; }
  .tfd-quiz__entry .tfd-btn { width: 100%; }
  .tfd-quiz__actions > .tfd-btn { flex: 1 1 100%; }
}

/* Teks untuk pembaca skrin sahaja. Keadaan jawapan kuiz tidak boleh bergantung
   pada warna atau ikon sahaja; assets/tfd-quiz.js menyuntik teks ini ke dalam
   setiap pilihan yang ditandakan. */
.tfd-sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

/* Skrin semakan FOKUS (aplikasi). Kad masuk dilangkau; X di kiri atas dan bar
   progres berkongsi satu baris di kepala, seperti prototaip. */
.tfd-quiz--fokus .tfd-quiz__flow,
.tfd-quiz--fokus .tfd-quiz__result { border: 0; box-shadow: none; padding: 0; max-width: none; }
.tfd-quiz--fokus .tfd-quiz__progress {
  display: flex; align-items: center; gap: var(--tfd-space-3);
  margin-bottom: var(--tfd-space-6);
}
.tfd-quiz--fokus .tfd-quiz__progress > span { order: 3; flex: none; }
.tfd-quiz--fokus .tfd-progress__track { order: 2; flex: 1; }
.tfd-quiz__tutup {
  order: 1; flex: none;
  width: var(--tfd-control-height); height: var(--tfd-control-height); display: grid; place-items: center;
  border: 1px solid var(--tfd-border); border-radius: var(--tfd-radius-md);
  background: var(--tfd-surface); color: var(--tfd-text);
}
.tfd-quiz__tutup:hover { background: var(--tfd-blue-soft); }
.tfd-quiz__tutup svg { width: 20px; height: 20px; }

/* Atribut [hidden] mesti menang.
   Peraturan UA `[hidden]{display:none}` ialah pemilih atribut tunggal, jadi
   mana-mana kelas dengan `display` mengalahkannya — .tfd-btn (inline-flex) dan
   .tfd-feedback (grid) kedua-duanya berbuat begitu. Kesannya nyata: butang
   "Teruskan" dan kotak penerangan muncul SEBELUM pelajar menjawab, membocorkan
   jawapan dan memecahkan aliran satu-soalan-satu-masa. */
[hidden] { display: none !important; }

/* Tajuk soalan menerima fokus secara program supaya pembaca skrin mengumumkan
   soalan baharu. Ia bukan kawalan, jadi bingkai fokus di situ hanya mengganggu
   pengguna tetikus tanpa memberi apa-apa makna. Pengumuman kekal. */
.tfd-quiz__question h3:focus { outline: none; }

/* Shared end-of-level invitations, public pages and signed-in learning. */
.tfd-tahap-footer { margin-top:32px; display:grid; gap:20px; }
.tfd-tahap-footer :is(.tahap-seterusnya,.wa-channel) { position:relative; isolation:isolate; overflow:hidden; border:0; border-radius:16px; margin:0; padding:32px; background:#EEF1FC; color:var(--tfd-navy); }
.tfd-tahap-footer :is(.tahap-seterusnya,.wa-channel)::before { content:""; position:absolute; inset:0; z-index:-1; pointer-events:none; background-image:var(--tfd-learning-pattern); background-size:160px 160px; opacity:.14; -webkit-mask-image:linear-gradient(#000,transparent 80%); mask-image:linear-gradient(#000,transparent 80%); }
.tfd-tahap-footer .tahap-seterusnya { text-align:center; }
.tfd-tahap-footer .tahap-seterusnya::before { filter:invert(1); opacity:.1; }
.tfd-tahap-footer h2 { font-family:var(--tfd-font-formal); font-size:var(--tfd-text-h2); line-height:1.3; margin:8px 0 14px; color:inherit; }
.tfd-tahap-footer p { font-size:var(--tfd-text-small); line-height:1.7; margin:0 0 20px; color:inherit; }
.tfd-tahap-footer .eyebrow { font-size:.75rem; letter-spacing:.14em; font-weight:700; text-transform:uppercase; color:var(--tfd-gold-ink); }
.tfd-tahap-footer .btn { display:inline-flex; align-items:center; justify-content:center; gap:10px; min-height:52px; padding:12px 22px; border:0; border-radius:12px; background:var(--tfd-navy); color:white; font:700 .875rem var(--tfd-font-ui); text-decoration:none; }
.tfd-tahap-footer .btn:hover { filter:brightness(1.12); }
.tfd-tahap-footer .btn:focus-visible { outline:3px solid var(--tfd-blue); outline-offset:4px; }
.tfd-tahap-footer .wa-channel { display:flex; align-items:center; justify-content:space-between; gap:24px; background:#063E74; color:white; }
.tfd-tahap-footer .wa-channel .eyebrow { color:#FFD681; }
.tfd-tahap-footer .wa-channel p { max-width:60ch; margin-bottom:0; color:#DAE9FA; }
.tfd-tahap-footer .wa-aksi { display:grid; justify-items:center; gap:10px; flex-shrink:0; }
.tfd-tahap-footer .wa-aksi small { color:#DAE9FA; font-size:.75rem; text-align:center; }
.tfd-tahap-footer .btn-wa { background:#12813C; }
.tfd-tahap-footer .btn-wa svg { width:20px; height:20px; fill:currentColor; stroke:none; }
@media(max-width:800px) {
  .tfd-tahap-footer :is(.tahap-seterusnya,.wa-channel) { padding:24px 20px; }
  .tfd-tahap-footer .wa-channel { flex-direction:column; align-items:stretch; }
  .tfd-tahap-footer .wa-aksi { flex-shrink:1; }
}
/* Butang kongsi asli (assets/tfd-kongsi.js) disembunyikan pada pelayar tanpa
   Web Share API. Kelas butang halaman (.btn, .pk-btn, .app-btn) menetapkan
   display sendiri dan mengalahkan [hidden] biasa, jadi ia dipaksa di sini. */
[data-kongsi-asli][hidden] { display: none !important; }