/* app.css — InstantGPA
   Design tokens first, then components. No inline one-off styles anywhere
   in the JS modules — every visual value used more than once lives here. */

:root {
  /* Color palette adapted from the reference InstantGPA build's visual
     identity (steel-blue primary + sage-teal accent), re-tuned here so
     every text color actually clears WCAG AA 4.5:1 against the
     background it's used on — several of the source values didn't
     (e.g. its accent teal measured 3.33:1 and its warning amber 2.78:1
     against white; both were darkened here until they cleared 4.5:1). */
  --color-ink: #1e2935;
  --color-ink-soft: #556270;
  --color-muted: #69707f;
  --color-bg: #f3f5f7;
  --color-surface: #fcfdfe;
  --color-surface-2: #eaf0f5;
  --color-border: #d7dfe7;
  --color-primary: #29475f;
  --color-primary-2: #355a78;
  --color-primary-soft: #eaf0f5;
  --color-accent: #4b9a8d;
  --color-good: #3c7b71;
  --color-warn: #9d6417;
  --color-danger: #b3423a;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;

  --shadow-sm: 0 1px 2px rgba(22, 34, 47, 0.06), 0 6px 16px rgba(22, 34, 47, 0.06);
  --shadow-md: 0 12px 32px -12px rgba(22, 34, 47, 0.22);

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;

  --control-h: 46px;
  --container-w: 1080px;

  --font-sans: "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;

  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-ink: #eef2f6;
    --color-ink-soft: #b9c4cf;
    --color-muted: #8b98a5;
    --color-bg: #101820;
    --color-surface: #172230;
    --color-surface-2: #1d2a3a;
    --color-border: #2a394a;
    --color-primary: #7fa8cc;
    --color-primary-2: #9dbfdd;
    --color-primary-soft: #1c3348;
    --color-accent: #4b9a8d;
    --color-good: #5cb3a3;
    --color-warn: #d78a1f;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-ink);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; scroll-behavior: auto !important; }
}

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

a { color: var(--color-primary-2); }

:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

/* ---------- Shell ---------- */
#app { min-height: 100vh; display: flex; flex-direction: column; }

.site-header {
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface);
  position: sticky; top: 0; z-index: 10;
}
.brand { display: flex; align-items: center; gap: var(--space-3); text-decoration: none; color: var(--color-ink); }
.brand-mark { font-size: 26px; }
.brand-text { display: flex; flex-direction: column; line-height: 1.2; }
.brand-text strong { font-size: 17px; color: var(--color-primary); }
.brand-text small { color: var(--color-muted); font-size: 12px; }

.lang-switcher select {
  height: 38px; border-radius: var(--radius-sm); border: 1px solid var(--color-border);
  background: var(--color-surface); color: var(--color-ink); padding: 0 var(--space-3);
}

.header-actions { display: flex; align-items: center; gap: var(--space-3); }
.icon-link {
  display: grid; place-items: center; width: 38px; height: 38px;
  border-radius: var(--radius-sm); border: 1px solid var(--color-border);
  background: var(--color-surface); text-decoration: none; font-size: 16px;
}
.icon-link:hover { border-color: var(--color-primary-2); }

.trial-banner {
  display: flex; align-items: center; justify-content: space-between; gap: var(--space-4);
  background: var(--color-primary); color: #fff;
  padding: var(--space-3) var(--space-5);
  font-size: 13px;
}
.trial-banner p { margin: 0; max-width: 960px; }
.trial-banner__close {
  flex: none; background: rgba(255,255,255,.15); color: #fff; border: 0;
  width: 28px; height: 28px; border-radius: 999px; cursor: pointer; font-size: 13px;
}
.trial-banner__close:hover { background: rgba(255,255,255,.28); }

.tools-grid--advanced { grid-template-columns: repeat(4, 1fr); margin-top: -8px; }
.tools-grid--advanced .tool-tile { font-size: 13px; background: var(--color-surface-2); box-shadow: none; }
.tools-grid--info { grid-template-columns: repeat(2, 1fr); margin-top: -8px; }
.tools-grid--info .tool-tile { font-size: 13px; background: transparent; box-shadow: none; border-style: dashed; }

.tool-card--loading { text-align: center; color: var(--color-muted); padding: var(--space-7) var(--space-6); }

.course-row--2 { grid-template-columns: 2fr 1fr auto; }
.tool-card--wide { max-width: 880px; }

.dash-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-3); margin: var(--space-4) 0; }
.dash-stat {
  background: var(--color-surface-2); border-radius: var(--radius-md);
  padding: var(--space-4); display: flex; flex-direction: column; gap: var(--space-1);
}
.dash-stat__label { font-size: 11px; text-transform: uppercase; letter-spacing: .03em; color: var(--color-muted); }
.dash-stat__value { font-size: 24px; font-weight: 800; color: var(--color-primary); font-variant-numeric: tabular-nums; }
.dash-stat__value--text { font-size: 15px; }
.dash-links { display: flex; flex-wrap: wrap; gap: var(--space-2); }

.tf-textarea {
  width: 100%; min-height: 140px; border-radius: var(--radius-sm); border: 1px solid var(--color-border);
  background: var(--color-surface); color: var(--color-ink); padding: var(--space-3);
  font-family: ui-monospace, "SFMono-Regular", Menlo, monospace; font-size: 13px; resize: vertical;
}
.trust-section { margin-top: var(--space-6); padding-top: var(--space-5); border-top: 1px solid var(--color-border); }
.trust-section:first-of-type { margin-top: var(--space-5); }
.trust-section h3 { margin: 0 0 var(--space-3); font-size: 15px; color: var(--color-primary); }
.trust-list { margin: 0; padding-inline-start: 20px; color: var(--color-ink-soft); }
.trust-list li { margin-bottom: var(--space-2); }

.intl-table { width: 100%; border-collapse: collapse; margin: var(--space-4) 0; font-size: 14px; }
.intl-table th, .intl-table td { text-align: start; padding: var(--space-2) var(--space-3); border-bottom: 1px solid var(--color-border); }
.intl-table th { color: var(--color-muted); font-size: 12px; text-transform: uppercase; letter-spacing: .02em; }

main#mainContent {
  flex: 1;
  width: 100%;
  max-width: var(--container-w);
  margin: 0 auto;
  padding: var(--space-6) var(--space-5) var(--space-7);
}

.site-footer {
  border-top: 1px solid var(--color-border);
  padding: var(--space-5);
  text-align: center;
  color: var(--color-muted);
  font-size: 13px;
}
.footer-links { display: flex; justify-content: center; gap: var(--space-4); margin-bottom: var(--space-2); flex-wrap: wrap; }
.footer-links a { text-decoration: none; color: var(--color-ink-soft); }
.footer-links a:hover { color: var(--color-primary); }
.footer-note { max-width: 640px; margin: 0 auto; }

/* ---------- Hero ---------- */
.hero { text-align: center; max-width: 640px; margin: 0 auto var(--space-6); }
.hero--compact { margin-bottom: var(--space-4); }
.hero--compact h1 { font-size: clamp(22px, 3vw, 28px); margin-bottom: var(--space-2); }
.hero--compact p { font-size: 14px; }
.hero-eyebrow {
  display: inline-block; padding: 6px 14px; border-radius: 999px;
  background: var(--color-primary-soft); color: var(--color-primary);
  font-size: 12px; font-weight: 700; letter-spacing: 0.02em; text-transform: uppercase;
  margin-bottom: var(--space-4);
}
.hero h1 { font-size: clamp(28px, 4vw, 40px); margin: 0 0 var(--space-3); color: var(--color-primary); }
.hero p { color: var(--color-ink-soft); font-size: 16px; margin: 0; }

/* ---------- Cards ---------- */
.setup-card, .tool-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: var(--space-6);
  max-width: 720px;
  margin: 0 auto;
}
.setup-card h2, .tool-card h2 { margin: 0 0 var(--space-2); font-size: 22px; color: var(--color-primary); }
.tool-sub { color: var(--color-muted); margin: 0 0 var(--space-5); font-size: 14px; }

.field-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-4);
  margin-bottom: var(--space-5);
}
.field { display: flex; flex-direction: column; gap: var(--space-2); font-size: 13px; font-weight: 600; color: var(--color-ink-soft); }
.field-note { font-size: 13px; color: var(--color-muted); }

input, select {
  height: var(--control-h);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-ink);
  padding: 0 var(--space-3);
  font-size: 15px;
  font-family: inherit;
  width: 100%;
}
input:disabled, select:disabled { opacity: 0.55; cursor: not-allowed; }
input:focus, select:focus { border-color: var(--color-primary-2); }

.setup-status { min-height: 20px; margin: var(--space-2) 0 var(--space-4); }
.setup-status__text { font-size: 13px; color: var(--color-ink-soft); margin: 0; }
.setup-status__text--warn { color: var(--color-warn); }

.row-actions { display: flex; align-items: center; gap: var(--space-3); flex-wrap: wrap; margin-top: var(--space-2); }
.setup-hint { font-size: 12px; color: var(--color-muted); }

.btn {
  height: 44px; padding: 0 var(--space-5); border-radius: var(--radius-sm);
  font-size: 14px; font-weight: 700; cursor: pointer; border: 1px solid transparent;
  font-family: inherit;
}
.btn--primary { background: var(--color-primary); color: #fff; }
.btn--primary:hover { background: var(--color-primary-2); }
.btn--primary:disabled { background: var(--color-border); color: var(--color-muted); cursor: not-allowed; }
.btn--ghost { background: var(--color-surface-2); color: var(--color-ink); border-color: var(--color-border); }
.btn--ghost:hover { background: var(--color-primary-soft); }
.btn--text { background: transparent; color: var(--color-primary-2); }
.btn--text:hover { text-decoration: underline; }

/* ---------- Profile bar ---------- */
.profile-bar {
  display: flex; align-items: center; justify-content: space-between; gap: var(--space-4);
  background: var(--color-primary-soft);
  border-radius: var(--radius-lg);
  padding: var(--space-4) var(--space-5);
  margin-bottom: var(--space-6);
  flex-wrap: wrap;
}
.profile-bar__label { display: block; font-size: 11px; text-transform: uppercase; letter-spacing: 0.03em; color: var(--color-primary-2); font-weight: 700; }
.profile-bar__uni { display: block; font-size: 17px; color: var(--color-ink); margin: 2px 0; }
.profile-bar__system { display: block; font-size: 12px; color: var(--color-ink-soft); }
.profile-bar__actions { display: flex; gap: var(--space-2); flex-wrap: wrap; }

/* ---------- Tools grid ---------- */
.tools-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-4);
  margin-bottom: var(--space-6);
}
.tool-tile {
  display: flex; align-items: center; justify-content: center; gap: var(--space-2); text-align: center;
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius-md); padding: var(--space-4);
  text-decoration: none; color: var(--color-ink); font-weight: 700; font-size: 14px;
  min-height: 64px;
  box-shadow: var(--shadow-sm);
}
.tool-tile__icon { font-size: 18px; line-height: 1; flex: none; }
.tool-tile:hover { border-color: var(--color-primary-2); }
.tool-tile.is-active { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }

.tool-host { max-width: 720px; margin: 0 auto; }

/* ---------- Course / grading rows ---------- */
.course-rows, .grading-rows { display: flex; flex-direction: column; gap: var(--space-2); margin-bottom: var(--space-4); }
.course-row, .grading-row {
  display: grid; align-items: center; gap: var(--space-2);
}
.course-row { grid-template-columns: 2fr 1fr 1fr auto; }
.grading-row { grid-template-columns: 2fr 1fr 1fr auto; }
.course-row--head, .grading-row--head { font-size: 12px; color: var(--color-muted); font-weight: 700; }
.row-remove {
  height: 40px; width: 40px; border-radius: var(--radius-sm); border: 1px solid var(--color-border);
  background: var(--color-surface); color: var(--color-danger); cursor: pointer; font-size: 15px;
}
.row-remove:hover { background: #fbeceb; }

.segmented { display: inline-flex; border: 1px solid var(--color-border); border-radius: 999px; padding: 3px; margin-bottom: var(--space-5); }
.segmented__btn {
  border: 0; background: transparent; padding: 8px 16px; border-radius: 999px; cursor: pointer;
  font-size: 13px; font-weight: 700; color: var(--color-ink-soft); font-family: inherit;
}
.segmented__btn.is-active { background: var(--color-primary); color: #fff; }

/* ---------- Results ---------- */
.result-box { min-height: 24px; }
.result-headline {
  display: flex; align-items: baseline; justify-content: space-between; gap: var(--space-3);
  background: var(--color-primary-soft); border-radius: var(--radius-md);
  padding: var(--space-4) var(--space-5); margin: var(--space-3) 0;
}
.result-label { font-size: 13px; font-weight: 700; color: var(--color-primary-2); text-transform: uppercase; letter-spacing: 0.02em; }
.result-value { font-size: 28px; font-weight: 800; color: var(--color-primary); font-variant-numeric: tabular-nums; }
.result-meta { display: flex; gap: var(--space-5); font-size: 13px; color: var(--color-ink-soft); flex-wrap: wrap; }
.result-note { font-size: 13px; padding: var(--space-3); border-radius: var(--radius-sm); margin: var(--space-3) 0; }
.result-note--muted { background: var(--color-surface-2); color: var(--color-muted); }
.result-note--warn { background: #fbeceb; color: var(--color-danger); }
.tool-note { font-size: 12px; color: var(--color-muted); margin-top: var(--space-4); }

/* ---------- RTL ---------- */
[dir="rtl"] .brand, [dir="rtl"] .profile-bar, [dir="rtl"] .row-actions,
[dir="rtl"] .footer-links, [dir="rtl"] .profile-bar__actions { direction: rtl; }
[dir="rtl"] .result-headline { direction: rtl; }
[dir="rtl"] .row-remove { transform: none; }

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .field-grid { grid-template-columns: 1fr; }
  .tools-grid { grid-template-columns: repeat(2, 1fr); }
  .tools-grid--advanced { grid-template-columns: repeat(2, 1fr); }
  .tools-grid--info { grid-template-columns: 1fr; }
  .dash-grid { grid-template-columns: repeat(2, 1fr); }
  .course-row, .grading-row { grid-template-columns: 1fr 70px 90px auto; }
}

@media (max-width: 480px) {
  main#mainContent { padding: var(--space-5) var(--space-3) var(--space-6); }
  .setup-card, .tool-card { padding: var(--space-4); }
  .tools-grid { grid-template-columns: 1fr 1fr; gap: var(--space-3); }
  .tools-grid--advanced { grid-template-columns: 1fr 1fr; }
  .profile-bar { flex-direction: column; align-items: flex-start; }
  .course-row, .grading-row { grid-template-columns: 1fr; }
  .course-row--head, .grading-row--head { display: none; }
  .row-remove { justify-self: end; }
}