/* English Placement — Prep Design System v5 tokens (plain CSS, values from tokens/v5-tokens.md) */

@font-face {
  font-family: 'SVN-Poppins';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url(./assets/fonts/svn-poppins/SVN-Poppins-SemiBold.woff2) format('woff2');
}
@font-face {
  font-family: 'SVN-Poppins';
  font-style: normal;
  font-display: swap;
  src: url(./assets/fonts/svn-poppins/SVN-Poppins-Regular.woff2) format('woff2');
}
@font-face {
  font-family: Inter;
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url(./assets/fonts/inter/inter_range_1.woff2) format('woff2');
  unicode-range: u+0460-052f, u+1c80-1c8a, u+20b4, u+2de0-2dff, u+a640-a69f, u+fe2e-fe2f;
}
@font-face {
  font-family: Inter;
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url(./assets/fonts/inter/inter_range_2.woff2) format('woff2');
  unicode-range: u+0301, u+0400-045f, u+0490-0491, u+04b0-04b1, u+2116;
}
@font-face {
  font-family: Inter;
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url(./assets/fonts/inter/inter_range_3.woff2) format('woff2');
  unicode-range: u+1f??;
}
@font-face {
  font-family: Inter;
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url(./assets/fonts/inter/inter_range_4.woff2) format('woff2');
  unicode-range: u+0370-0377, u+037a-037f, u+0384-038a, u+038c, u+038e-03a1, u+03a3-03ff;
}
@font-face {
  font-family: Inter;
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url(./assets/fonts/inter/inter_range_5.woff2) format('woff2');
  unicode-range: u+0102-0103, u+0110-0111, u+0128-0129, u+0168-0169, u+01a0-01a1, u+01af-01b0,
    u+0300-0301, u+0303-0304, u+0308-0309, u+0323, u+0329, u+1ea0-1ef9, u+20ab;
}
@font-face {
  font-family: Inter;
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url(./assets/fonts/inter/inter_range_6.woff2) format('woff2');
  unicode-range: u+0100-02ba, u+02bd-02c5, u+02c7-02cc, u+02ce-02d7, u+02dd-02ff, u+0304, u+0308,
    u+0329, u+1d00-1dbf, u+1e00-1e9f, u+1ef2-1eff, u+2020, u+20a0-20ab, u+20ad-20c0, u+2113,
    u+2c60-2c7f, u+a720-a7ff;
}
@font-face {
  font-family: Inter;
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url(./assets/fonts/inter/inter_range_7.woff2) format('woff2');
  unicode-range: u+00??, u+0131, u+0152-0153, u+02bb-02bc, u+02c6, u+02da, u+02dc, u+0304, u+0308,
    u+0329, u+2000-206f, u+20ac, u+2122, u+2191, u+2193, u+2212, u+2215, u+feff, u+fffd;
}

/* ---------- tokens ---------- */
:root {
  color-scheme: light;

  /* colour — v5 semantic aliases */
  --color-canvas: #F2F4F7;               /* base-surface-tertiary (grouped canvas) */
  --color-surface: #FFFFFF;              /* base-surface-primary */
  --color-fill: #F2F4F7;                 /* base-on-surface-secondary */
  --color-hairline: #E8ECF3;             /* border-base-secondary */
  --color-border-strong: #D8DEE9;        /* border-base-primary */
  --color-text: #1F242E;                 /* text-base-primary */
  --color-text-2: #566681;               /* text-base-secondary */
  --color-icon: #8394AE;                 /* text-base-tertiary — icons and placeholders only */
  --color-brand: #0060FD;                /* brand-primary */
  --color-brand-hover: #004FE5;          /* brand-secondary */
  --color-on-brand: #FFFFFF;
  --color-tint: #E0F0FF;                 /* dim-brand-secondary */
  --color-tint-border: #D3EAFF;          /* border dim-brand-secondary */
  --color-accent: #0060FD;               /* product-line-ielts-primary */
  --color-accent-tint: #E0F0FF;          /* product-line-ielts-secondary */
  --color-accent-text: #0060FD;          /* accent used as text on the tint */
  --color-negative: #E6193B;             /* support-negative-primary */
  --color-negative-tint: #FDECEF;        /* dim-negative-primary */
  --color-positive: #105126;
  --color-positive-tint: #E9FAED;
  --color-warning: #854B00;
  --color-warning-tint: #FEF3E5;         /* dim-warning-primary */
  --color-scrim: rgba(31, 36, 46, 0.5);  /* base-surface-overlay */
  --color-bar: rgba(255, 255, 255, 0.76);/* material-thin */
  --color-bar-wide: rgba(242, 244, 247, 0.88);
  --logo-filter: none;

  /* radius */
  --radius-s: 8px;
  --radius-m: 12px;
  --radius-l: 16px;
  --radius-l-plus: 20px;
  --radius-2xl: 32px;
  --radius-full: 999px;

  /* elevation */
  --shadow-card: 0 0 0 1px rgba(31, 36, 46, 0.04), 0 1px 2px 0 rgba(31, 36, 46, 0.05), 0 2px 6px -2px rgba(31, 36, 46, 0.04);
  --shadow-raised: 0 0 0 1px rgba(31, 36, 46, 0.04), 0 2px 4px -2px rgba(31, 36, 46, 0.06), 0 6px 16px -4px rgba(31, 36, 46, 0.1);
  --shadow-overlay: 0 0 0 1px rgba(31, 36, 46, 0.05), 0 8px 16px -8px rgba(31, 36, 46, 0.08), 0 28px 64px -16px rgba(31, 36, 46, 0.3);
  --shadow-brand: 0 1px 2px 0 rgba(0, 60, 160, 0.16), 0 8px 20px -6px rgba(0, 96, 253, 0.45);

  /* motion */
  --duration-instant: 100ms;
  --duration-fast: 160ms;
  --duration-base: 240ms;
  --duration-slow: 400ms;
  --ease-standard: cubic-bezier(0.2, 0, 0, 1);
  --ease-enter: cubic-bezier(0, 0, 0.2, 1);
  --ease-spring: cubic-bezier(0.34, 1.4, 0.64, 1);

  /* type */
  --font-display: 'SVN-Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans', sans-serif;
  --font-body: Inter, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans', sans-serif;

  /* layout */
  --gutter: 16px;
  --content-max: 600px;
}

@media (min-width: 768px) {
  :root { --gutter: 24px; }
}
@media (min-width: 1280px) {
  :root { --gutter: 32px; }
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --color-canvas: #14181F;
    --color-surface: #1F242E;            /* neutral-900 */
    --color-fill: #2A313D;
    --color-hairline: #343C4B;
    --color-border-strong: #3D495C;      /* neutral-800 */
    --color-text: #F9FAFB;
    --color-text-2: #B9C4D5;
    --color-icon: #8394AE;
    --color-brand: #0060FD;
    --color-brand-hover: #2B7AFF;
    --color-tint: rgba(8, 102, 255, 0.18);
    --color-tint-border: rgba(97, 176, 255, 0.55);
    --color-accent: #0060FD;
    --color-accent-tint: rgba(8, 102, 255, 0.18);
    --color-accent-text: #61B0FF;
    --color-negative: #F6ADB8;
    --color-negative-tint: rgba(230, 25, 59, 0.16);
    --color-positive: #59D97F;
    --color-positive-tint: rgba(36, 193, 89, 0.18);
    --color-warning: #FFD59A;
    --color-warning-tint: rgba(255, 147, 5, 0.16);
    --color-scrim: rgba(0, 0, 0, 0.6);
    --color-bar: rgba(20, 24, 31, 0.8);
    --color-bar-wide: rgba(20, 24, 31, 0.88);
    --logo-filter: brightness(0) invert(1);
    --shadow-card: 0 0 0 1px rgba(255, 255, 255, 0.06);
    --shadow-raised: 0 0 0 1px rgba(255, 255, 255, 0.08), 0 6px 16px -4px rgba(0, 0, 0, 0.5);
    --shadow-overlay: 0 0 0 1px rgba(255, 255, 255, 0.08), 0 28px 64px -16px rgba(0, 0, 0, 0.7);
  }
}

/* ---------- base ---------- */
*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  min-height: 100dvh;
  background: var(--color-canvas);
  color: var(--color-text);
  font: 400 16px/24px var(--font-body);
  letter-spacing: -0.011em;
  -webkit-font-smoothing: antialiased;
  display: flex;
  flex-direction: column;
}

button { font: inherit; color: inherit; letter-spacing: inherit; }

:focus-visible {
  outline: 2px solid var(--color-brand);
  outline-offset: 2px;
}

.skip-link {
  position: absolute;
  left: var(--gutter);
  top: -96px;
  padding: 8px 16px;
  background: var(--color-surface);
  color: var(--color-brand);
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-raised);
  z-index: 2030;
}
.skip-link:focus { top: 12px; }

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* ---------- chrome ---------- */
.topbar {
  padding: env(safe-area-inset-top) 0 0;
}
.topbar-inner {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 16px var(--gutter) 8px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.logo {
  flex: none;
  height: 28px;
  width: auto;
  filter: var(--logo-filter);
}
.topbar-product {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font: 400 14px/20px var(--font-body);
  color: var(--color-text-2);
  padding-left: 12px;
  border-left: 1px solid var(--color-border-strong);
}
/* The brand is never translated; the test's name sits on the line below (Tu 2026-11-12). */
.topbar-product { display: flex; flex-direction: column; }
.topbar-brand { font: 600 14px/18px var(--font-display); color: var(--color-text); white-space: nowrap; }
.topbar-sub { font: 400 12px/16px var(--font-body); color: var(--color-text-2); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
[hidden] { display: none !important; }
/* at phone width the product name gives way to "Làm lại từ đầu" while a test is in progress */
@media (max-width: 419px) {
  .topbar-inner:has(.topbar-restart:not([hidden])) .topbar-product { display: none; }
}
.topbar-restart {
  flex: none;
  margin-left: auto;
  font-size: 14px;
  line-height: 20px;
  min-height: 36px;
  padding: 0 8px;
}

.app {
  flex: 1;
  width: 100%;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 8px var(--gutter) 24px;
}

.screen {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.screen.is-entering { animation: rise-in var(--duration-base) var(--ease-enter); }
[data-focus]:focus { outline: none; }

/* position marker — Tag in the test accent */
.marker {
  align-self: flex-start;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 32px;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  background: var(--color-accent-tint);
  color: var(--color-accent-text);
  font: 600 14px/20px var(--font-body);
  letter-spacing: -0.006em;
  font-variant-numeric: tabular-nums;
}

/* ---------- type ---------- */
.title {
  margin: 0;
  font: 600 20px/28px var(--font-display);
  letter-spacing: -0.012em;
}
.text-2 { color: var(--color-text-2); }
.caption {
  margin: 0;
  font: 400 14px/20px var(--font-body);
  letter-spacing: -0.006em;
  color: var(--color-text-2);
}
@media (min-width: 768px) {
  .title { font-size: 24px; line-height: 32px; }
}

/* ---------- card ---------- */
.card {
  background: var(--color-surface);
  border-radius: var(--radius-l-plus);
  padding: 20px 16px;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  gap: 16px;
}
@media (min-width: 768px) {
  .card { padding: 24px; border-radius: var(--radius-l); }
}

/* the read-aloud sentence — display scale (typo-display-s) */
.sentence {
  margin: 0;
  font: 600 24px/30px var(--font-display);
  letter-spacing: -0.012em;
}
@media (min-width: 768px) {
  .sentence { font-size: 30px; line-height: 36px; }
}
/* the spoken-answer question (typo-title-l) */
.question {
  margin: 0;
  font: 600 20px/28px var(--font-display);
  letter-spacing: -0.012em;
}
@media (min-width: 768px) {
  .question { font-size: 24px; line-height: 32px; }
}

/* reading stem — CMS HTML (typo-body-l) */
.stem {
  font: 400 18px/30px var(--font-body);
  letter-spacing: -0.014em;
  overflow-wrap: anywhere;
}
.stem p { margin: 0 0 12px; }
.stem p:last-child { margin-bottom: 0; }
.stem-question { font-weight: 600; }
.stem img { max-width: 100%; height: auto; }

/* ---------- buttons (v5 Button, pill, press scale) ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 48px;
  padding: 0 24px;
  border: 0;
  border-radius: var(--radius-full);
  font: 600 16px/24px var(--font-body);
  letter-spacing: -0.011em;
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  transition: background var(--duration-fast) var(--ease-standard),
              color var(--duration-fast) var(--ease-standard),
              transform var(--duration-instant) var(--ease-standard),
              opacity var(--duration-fast) var(--ease-standard);
}
.btn:active:not(:disabled) { transform: scale(0.97); }
.btn:disabled { opacity: 0.4; cursor: not-allowed; }
.btn .icon { width: 20px; height: 20px; flex: none; }

.btn-primary {
  background: var(--color-brand);
  color: var(--color-on-brand);
  box-shadow: var(--shadow-brand);
}
.btn-primary:hover:not(:disabled) { background: var(--color-brand-hover); }
.btn-primary:disabled { box-shadow: none; }

.btn-tinted {
  background: var(--color-tint);
  color: var(--color-brand);
}
.btn-tinted:hover:not(:disabled) { background: var(--color-tint-border); }
@media (prefers-color-scheme: dark) {
  .btn-tinted { color: #61B0FF; }
  .btn-tinted:hover:not(:disabled) { background: rgba(8, 102, 255, 0.3); }
}

.btn-neutral {
  background: var(--color-fill);
  color: var(--color-text);
}
.btn-neutral:hover:not(:disabled) { background: var(--color-hairline); }

.btn-text {
  background: transparent;
  color: var(--color-brand);
  padding: 0 12px;
  min-height: 44px;
  font-weight: 600;
}
.btn-text:hover:not(:disabled) { background: var(--color-tint); }
@media (prefers-color-scheme: dark) {
  .btn-text { color: #61B0FF; }
}

.btn-block { width: 100%; }
/* long text buttons may wrap (two skip reasons) */
.btn-wrap { white-space: normal; text-align: center; padding: 10px 12px; line-height: 24px; }


/* ---------- answer options (v5 AnswerOption) ---------- */
.options {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.answer {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  min-height: 56px;
  padding: 12px 16px;
  text-align: left;
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-l);
  background: var(--color-surface);
  cursor: pointer;
  font: 400 16px/24px var(--font-body);
  letter-spacing: -0.011em;
  transition: background var(--duration-fast) var(--ease-standard),
              border-color var(--duration-fast) var(--ease-standard),
              transform var(--duration-instant) var(--ease-standard);
}
.answer:hover:not(:disabled) { border-color: var(--color-border-strong); }
.answer:active:not(:disabled) { transform: scale(0.99); }
.answer:disabled { cursor: not-allowed; opacity: 0.5; }
.answer .answer-mark {
  flex: none;
  width: 24px; height: 24px;
  border-radius: var(--radius-full);
  border: 2px solid var(--color-border-strong);
  display: grid;
  place-items: center;
  transition: inherit;
}
.answer .answer-mark::after {
  content: '';
  width: 12px; height: 12px;
  border-radius: var(--radius-full);
  background: var(--color-brand);
  transform: scale(0);
  transition: transform var(--duration-fast) var(--ease-spring);
}
.answer[aria-checked="true"] {
  background: var(--color-tint);
  border-color: var(--color-brand);
}
.answer[aria-checked="true"] .answer-mark { border-color: var(--color-brand); }
.answer[aria-checked="true"] .answer-mark::after { transform: scale(1); }
.answer-label { flex: 1; }

/* a fill-in-the-blank slot inside the stem */
.blank {
  display: inline-block;
  min-width: 3.2em;
  margin: 0 2px;
  padding: 0 10px;
  border-bottom: 2px solid var(--color-brand);
  background: var(--color-tint);
  border-radius: 8px 8px 0 0;
  text-align: center;
  vertical-align: baseline;
}
.blank-letters {
  font: 600 14px/20px var(--font-body);
  color: var(--color-brand);
  letter-spacing: 0.04em;
}
.blank.is-filled { color: var(--color-brand); font-weight: 600; }

/* ---------- recording ---------- */
.rec {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 8px 0;
}
.rec-dot {
  width: 16px; height: 16px;
  border-radius: var(--radius-full);
  background: var(--color-negative);
  box-shadow: 0 0 0 0 rgba(230, 25, 59, 0.4);
  animation: rec-pulse 1.2s var(--ease-standard) infinite;
}
.rec-time {
  font: 600 30px/36px var(--font-display);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.022em;
}
.rec-hint { margin: 0; color: var(--color-text-2); font-size: 14px; line-height: 20px; text-align: center; }
/* live input level (mic check) */
.meter {
  width: min(100%, 280px);
  height: 8px;
  border-radius: var(--radius-full);
  background: var(--color-hairline);
  overflow: hidden;
}
.meter-fill {
  width: 0;
  height: 100%;
  border-radius: var(--radius-full);
  background: var(--color-accent);
  transition: width 80ms linear;
}

/* ---------- waits, messages ---------- */
.wait {
  margin: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  min-height: 48px;
  color: var(--color-text-2);
}
.spinner {
  flex: none;
  width: 20px; height: 20px;
  border-radius: var(--radius-full);
  border: 2px solid var(--color-hairline);
  border-top-color: var(--color-brand);
  animation: spin 0.9s linear infinite;
}

.inform {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 12px 16px;
  border-radius: var(--radius-m);
  background: var(--color-warning-tint);
}
.inform-negative { background: var(--color-negative-tint); }
/* level change — tinted brand, same as .btn-tinted */
.inform-brand { background: var(--color-tint); color: var(--color-brand); }
.inform.inform-brand .icon { color: var(--color-brand); }
@media (prefers-color-scheme: dark) {
  .inform-brand, .inform.inform-brand .icon { color: #61B0FF; }
}
.inform p { margin: 0; }
/* a one-line note under a card: caption size, no box weight */
.inform-note { margin: -4px 0 0; padding: 8px 12px; font-size: 14px; line-height: 20px; }
.inform-note .icon { width: 16px; height: 16px; margin-top: 2px; }
.inform .icon { flex: none; width: 20px; height: 20px; margin-top: 2px; color: var(--color-text-2); }
.inform-negative .icon { color: var(--color-negative); }

/* ---------- action bar (sticky, material-thin) ---------- */
.actions {
  position: sticky;
  bottom: 0;
  z-index: 100;
  margin: 8px calc(-1 * var(--gutter)) -24px;
  padding: 12px var(--gutter) calc(12px + env(safe-area-inset-bottom));
  background: var(--color-bar);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  backdrop-filter: saturate(180%) blur(20px);
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 8px;
}
.actions .btn-text { align-self: center; }
.actions.actions-static {
  position: static;
  margin: 8px 0 0;
  padding: 0 0 env(safe-area-inset-bottom);
  background: none;
  -webkit-backdrop-filter: none;
  backdrop-filter: none;
}
@media (min-width: 768px) {
  .actions { background: var(--color-bar-wide); }
}
.actions-row {
  display: flex;
  gap: 12px;
}
.actions-row .btn { flex: 1; }

/* ---------- result ---------- */
.result-hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 8px;
}
.bee {
  width: 160px;
  height: 160px;
  object-fit: contain;
}
@media (min-width: 768px) { .bee { width: 200px; height: 200px; } }
.result-title {
  margin: 0;
  font: 600 30px/36px var(--font-display);
  letter-spacing: -0.022em;
}
@media (min-width: 768px) { .result-title { font-size: 36px; line-height: 44px; } }
.result-kicker {
  margin: 0;
  font: 600 16px/24px var(--font-body);
  color: var(--color-text-2);
}
.result-sub {
  margin: 0;
  font: 600 18px/26px var(--font-display);
  letter-spacing: -0.012em;
  color: var(--color-accent-text);
  font-variant-numeric: tabular-nums;
}
@media (min-width: 768px) { .result-sub { font-size: 20px; line-height: 28px; } }
.path {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
}
.path li {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 0;
  border-top: 1px solid var(--color-hairline);
  font-variant-numeric: tabular-nums;
}
.path li:first-child { border-top: 0; padding-top: 0; }
.path li:last-child { padding-bottom: 0; }
.path li > span:first-child { flex: none; white-space: nowrap; }
.path .path-value { color: var(--color-text-2); text-align: right; }
.section-label {
  margin: 0;
  font: 600 14px/20px var(--font-body);
  letter-spacing: -0.006em;
  color: var(--color-text-2);
}

/* the result: one exam's score as the hero figure, the course under it (Tu 2026-11-07) */
.score-card {
  background: var(--color-tint);
  border-radius: var(--radius-l-plus);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  text-align: center;
  box-shadow: inset 0 0 0 1px rgba(0, 96, 253, 0.12);
}
.score-card .section-label { color: var(--color-brand); }
.score-list { display: flex; justify-content: center; gap: 32px; flex-wrap: wrap; }
.score-item { display: flex; flex-direction: column; align-items: center; gap: 4px; }
.score-name { margin: 0; font: 600 14px/20px var(--font-body); color: var(--color-text-2); }
.score-value {
  margin: 0;
  font: 600 48px/56px var(--font-display);
  letter-spacing: -0.022em;
  color: var(--color-brand);
  font-variant-numeric: tabular-nums;
}
@media (min-width: 768px) { .score-value { font-size: 60px; line-height: 68px; } }
.score-none { margin: 0; font: 600 18px/26px var(--font-display); color: var(--color-text-2); }
.courses { margin: 0; padding: 0; list-style: none; display: flex; flex-direction: column; gap: 12px; }
.courses li { display: flex; flex-direction: column; gap: 2px; }
.course-alt { padding-top: 12px; border-top: 1px solid var(--color-hairline); }
.course-name { margin: 0; font: 600 18px/26px var(--font-display); letter-spacing: -0.012em; color: var(--color-accent-text); }
.course-alt .course-name { font-size: 16px; line-height: 24px; color: var(--color-text); }

/* derived values: "ước tính" (v5 Tag, neutral, small) */
.tag-estimate {
  display: inline-flex;
  align-items: center;
  padding: 0 8px;
  border-radius: var(--radius-full);
  background: var(--color-fill);
  color: var(--color-text-2);
  font: 600 12px/20px var(--font-body);
  letter-spacing: 0;
  white-space: nowrap;
  vertical-align: middle;
}
.caption-center { text-align: center; }
.inform-action { margin-left: -12px; }

/* ---------- dialog (mid-screen, never a sheet) ---------- */
.dialog {
  width: min(calc(100% - 2 * var(--gutter)), 400px);
  margin: auto;
  padding: 0;
  border: 0;
  border-radius: var(--radius-2xl);
  background: var(--color-surface);
  color: var(--color-text);
  box-shadow: var(--shadow-overlay);
}
.dialog::backdrop { background: var(--color-scrim); }
.dialog[open] { animation: scale-in var(--duration-base) var(--ease-spring); }
.dialog-body {
  margin: 0;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.dialog-title {
  margin: 0;
  font: 600 20px/28px var(--font-display);
  letter-spacing: -0.012em;
}
.dialog-text { margin: 0; color: var(--color-text-2); }
.dialog-actions {
  display: flex;
  gap: 12px;
  margin-top: 16px;
}
.dialog-actions .btn { flex: 1; padding: 0 16px; }

/* ---------- motion ---------- */
@keyframes rise-in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: none; }
}
@keyframes scale-in {
  from { opacity: 0; transform: scale(0.96); }
  to { opacity: 1; transform: scale(1); }
}
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes rec-pulse {
  0% { box-shadow: 0 0 0 0 rgba(230, 25, 59, 0.4); }
  70% { box-shadow: 0 0 0 12px rgba(230, 25, 59, 0); }
  100% { box-shadow: 0 0 0 0 rgba(230, 25, 59, 0); }
}
@keyframes pulse-ring {
  0% { box-shadow: 0 0 0 0 rgba(0, 96, 253, 0.35); }
  70% { box-shadow: 0 0 0 14px rgba(0, 96, 253, 0); }
  100% { box-shadow: 0 0 0 0 rgba(0, 96, 253, 0); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .spinner { animation: none; border-top-color: var(--color-hairline); }
  .rec-dot, .play.is-playing .play-glyph { animation: none; }
}

/* ---------- question screen: one viewport (Tu 2026-11-07) ----------
   The question, every option and the actions fit the screen on a phone and on a laptop; only a
   long passage scrolls, inside its own card. */
body.is-module { height: 100dvh; }
body.is-module .app { display: flex; flex-direction: column; min-height: 0; padding-bottom: 0; }
.screen-module { flex: 1; min-height: 0; gap: 12px; overflow-y: auto; }
.screen-module > * { flex: none; }
.screen-module > .card {
  flex: 0 1 auto;
  min-height: 96px;
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: 16px;
  gap: 12px;
}
.module-head { display: flex; align-items: center; gap: 10px; min-width: 0; }
.module-head .marker { flex: none; white-space: nowrap; }
/* the instruction or the level-change chip takes what is left of the one line, never a second line */
.module-head .module-title, .module-head .level-change { min-width: 0; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.module-title {
  margin: 0;
  min-width: 0;
  font: 600 16px/24px var(--font-display);
  letter-spacing: -0.012em;
  color: var(--color-text-2);
}
.level-change {
  margin: 0;
  padding: 2px 10px;
  border-radius: var(--radius-full);
  background: var(--color-tint);
  color: var(--color-brand);
  font: 600 14px/20px var(--font-body);
  animation: scale-in var(--duration-base) var(--ease-spring);
}
.card-note { margin: 0; font: 400 13px/18px var(--font-body); color: var(--color-text-2); }
body.is-module .topbar-inner { padding-top: 10px; padding-bottom: 4px; }
.screen-module .stem { font-size: 16px; line-height: 26px; }
@media (min-width: 768px) { .screen-module .stem { font-size: 18px; line-height: 28px; } }

/* compact play row (v5 AudioPlayer, one line): glyph, state, play rule */
.play-wrap { display: flex; }
.play {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  min-height: 56px;
  padding: 6px 16px 6px 6px;
  border: 0;
  border-radius: var(--radius-full);
  background: var(--color-accent-tint);
  color: var(--color-accent);
  text-align: left;
  cursor: pointer;
  transition: filter var(--duration-fast) var(--ease-standard), transform var(--duration-instant) var(--ease-standard);
}
.play:hover:not(:disabled) { filter: brightness(0.97); }
.play:active:not(:disabled) { transform: scale(0.99); }
.play:disabled { cursor: default; }
.play.is-done { opacity: 0.6; }
.play .play-glyph {
  flex: none;
  width: 44px; height: 44px;
  border-radius: var(--radius-full);
  background: var(--color-accent);
  color: var(--color-on-brand);
  display: grid;
  place-items: center;
}
.play .play-glyph svg { width: 22px; height: 22px; }
.play.is-playing .play-glyph { animation: pulse-ring 1.2s var(--ease-standard) infinite; }
.play-text { display: flex; flex-direction: column; min-width: 0; }
.play-label { font: 600 16px/22px var(--font-body); letter-spacing: -0.011em; }
.play-caption { font: 400 13px/18px var(--font-body); color: var(--color-text-2); }

/* lettered options: the letter is the selection mark */
.screen-module .options { gap: 8px; }
.screen-module .answer { min-height: 44px; padding: 6px 12px 6px 8px; gap: 10px; line-height: 22px; }
.screen-module .answer .answer-mark {
  width: 28px; height: 28px;
  border-width: 1.5px;
  font: 600 14px/1 var(--font-body);
  color: var(--color-text-2);
}
.screen-module .answer .answer-mark::after { content: none; }
.screen-module .answer[aria-checked="true"] .answer-mark {
  background: var(--color-brand);
  border-color: var(--color-brand);
  color: var(--color-on-brand);
}

/* actions: skip and continue on one row, at the bottom of the screen */
.screen-module .actions { position: static; margin: auto 0 0; padding: 4px 0 calc(8px + env(safe-area-inset-bottom)); background: none; -webkit-backdrop-filter: none; backdrop-filter: none; }
.screen-module .actions-row { align-items: center; }
.screen-module .actions-row .btn-text { flex: none; }
.screen-module .actions-row .btn-primary { flex: 1; }

/* short screens (an iPhone SE with Safari's bars, a landscape laptop): tighter still, never a scroll */
@media (max-height: 700px) {
  body.is-module .topbar-inner { padding-top: 6px; padding-bottom: 2px; }
  body.is-module .logo { height: 22px; }
  body.is-module .app { padding-top: 4px; }
  .screen-module { gap: 8px; }
  .screen-module .marker { min-height: 26px; padding: 2px 10px; font-size: 13px; line-height: 18px; }
  .screen-module > .card { min-height: 72px; padding: 12px; gap: 8px; }
  .screen-module .options { gap: 6px; }
  .screen-module .answer { min-height: 40px; padding: 4px 10px 4px 6px; font-size: 15px; line-height: 20px; }
  .screen-module .answer .answer-mark { width: 26px; height: 26px; font-size: 13px; }
  .play { min-height: 48px; padding: 4px 14px 4px 4px; }
  .play .play-glyph { width: 40px; height: 40px; }
  .screen-module .btn { min-height: 40px; }
  .screen-module .actions { padding-bottom: calc(4px + env(safe-area-inset-bottom)); }
}
@media (prefers-color-scheme: dark) {
  .score-card .section-label, .score-value { color: #61B0FF; }
}

/* Technical mastery counts. */
.kg-tiles { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.kg-tile { border-radius: var(--radius-m); padding: 10px 12px; display: flex; flex-direction: column; }
.kg-tile-n { font: 600 28px/34px var(--font-display); font-variant-numeric: tabular-nums; }
.kg-tile-label { font: 600 13px/18px var(--font-body); }
.kg-tile.is-weak { background: var(--color-negative-tint); color: #B3102C; }
.kg-tile.is-shaky { background: var(--color-warning-tint); color: #B86800; }
.kg-tile.is-mastered { background: #E9FAED; color: #177837; }
@media (prefers-color-scheme: dark) {
  .kg-tile.is-weak { color: #FF8A9E; }
  .kg-tile.is-shaky { color: #FFB866; }
  .kg-tile.is-mastered { background: rgba(36, 193, 89, 0.16); color: #6FE399; }
}