/**
 * Lumino AI — Unified Design System (2050)
 * Single source: spacing, type, color, motion, components.
 * Light = platform default (:root in base.html). Dark immersive = test/PLG flows.
 */

/* ─── Extended tokens (inherit base :root) ─── */
:root {
  --lum-space-0: 0;
  --lum-space-1: var(--space-1, 0.25rem);
  --lum-space-2: var(--space-2, 0.5rem);
  --lum-space-3: var(--space-3, 0.75rem);
  --lum-space-4: var(--space-4, 1rem);
  --lum-space-5: var(--space-5, 1.25rem);
  --lum-space-6: var(--space-6, 1.5rem);
  --lum-space-8: 2rem;

  --lum-radius-sm: var(--radius-sm, 14px);
  --lum-radius-md: var(--radius-md, 16px);
  --lum-radius-lg: var(--radius-lg, 22px);
  --lum-radius-xl: var(--radius, 22px);
  --lum-radius-pill: 999px;

  --lum-font: var(--font, "DM Sans", system-ui, sans-serif);
  --lum-font-display: var(--font-display, "Syne", sans-serif);

  --lum-brand: var(--lum-octo-mid, #5f6fe8);
  --lum-brand-deep: var(--lum-octo-to, #4d5ed4);
  --lum-brand-soft: rgba(var(--lum-octo-rgb, 95, 111, 232), 0.12);
  --lum-mint: #059669;
  --lum-mint-bright: #34d399;
  --lum-cyan: #22d3ee;
  --lum-violet: var(--violet, #7c6ae8);

  --lum-ink: var(--text, #152032);
  --lum-muted: var(--muted, #5a6578);
  --lum-line: var(--border, rgba(15, 23, 42, 0.07));
  --lum-surface: var(--surface, rgba(255, 255, 255, 0.98));
  --lum-shadow: var(--shadow-elev, 0 10px 26px rgba(57, 78, 161, 0.12));

  --lum-ease: cubic-bezier(0.2, 0.85, 0.2, 1);
  --lum-trans-fast: var(--trans-fast, 120ms var(--lum-ease));
  --lum-trans-base: var(--trans-base, 190ms var(--lum-ease));
  --lum-spring: cubic-bezier(0.22, 1, 0.36, 1);

  /* Immersive (PLG / tests / cyber flows) */
  --lum-immersive-bg: #020617;
  --lum-immersive-surface: rgba(15, 23, 42, 0.72);
  --lum-immersive-card: rgba(255, 255, 255, 0.05);
  --lum-immersive-line: rgba(255, 255, 255, 0.1);
  --lum-immersive-text: #f1f5f9;
  --lum-immersive-muted: #94a3b8;
  --lum-immersive-glow: 0 0 30px rgba(52, 211, 153, 0.35), 0 0 60px rgba(34, 211, 238, 0.2);
}

/* ─── Typography scale ─── */
.lum-ui-display {
  font-family: var(--lum-font-display);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.12;
  color: var(--lum-ink);
}
.lum-ui-title {
  font-family: var(--lum-font-display);
  font-size: clamp(1.35rem, 3.5vw, 1.75rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin: 0 0 var(--lum-space-3);
}
.lum-ui-lead {
  font-size: 0.9375rem;
  line-height: 1.55;
  color: var(--lum-muted);
  margin: 0;
}
.lum-ui-eyebrow {
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--lum-brand);
  margin: 0 0 var(--lum-space-2);
}

/* ─── Buttons (bridge .btn) ─── */
.lum-ui-btn,
a.lum-ui-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  min-height: 44px;
  padding: 0.62rem 1.25rem;
  border-radius: var(--lum-radius-pill);
  border: 1px solid transparent;
  font-family: var(--lum-font);
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  text-decoration: none !important;
  cursor: pointer;
  transition: transform var(--lum-trans-fast), box-shadow var(--lum-trans-base), border-color var(--lum-trans-fast), background var(--lum-trans-fast);
}
.lum-ui-btn:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px var(--focus-ring);
}
.lum-ui-btn--primary,
.lum-ui-btn.lum-ui-btn--primary {
  color: #fff;
  background: linear-gradient(135deg, var(--lum-octo-from, #7b88f4), var(--lum-brand), var(--lum-brand-deep));
  box-shadow: 0 8px 24px rgba(var(--lum-octo-rgb), 0.28);
}
.lum-ui-btn--primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 12px 28px rgba(var(--lum-octo-rgb), 0.34);
}
.lum-ui-btn--secondary {
  color: var(--lum-ink);
  background: var(--lum-surface);
  border-color: var(--lum-line);
  box-shadow: var(--shadow-soft, 0 6px 18px rgba(15, 23, 42, 0.06));
}
.lum-ui-btn--ghost {
  color: var(--lum-muted);
  background: transparent;
  border-color: var(--lum-line);
}
.lum-ui-btn--mint {
  color: #042f2e;
  background: linear-gradient(90deg, var(--lum-mint-bright), var(--lum-cyan));
  box-shadow: var(--lum-immersive-glow);
}
.lum-ui-btn--block { width: 100%; }
.lum-ui-btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none !important;
}

/* ─── Cards & glass ─── */
.lum-ui-card {
  border-radius: var(--lum-radius-lg);
  border: 1px solid var(--lum-line);
  background: var(--lum-surface);
  box-shadow: var(--lum-shadow);
  padding: var(--lum-space-5);
}
.lum-ui-glass {
  border-radius: var(--lum-radius-lg);
  border: 1px solid var(--lum-line);
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: var(--lum-shadow);
}
.lum-ui-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.22rem 0.55rem;
  border-radius: var(--lum-radius-pill);
  font-size: 0.68rem;
  font-weight: 700;
  border: 1px solid var(--lum-brand-soft);
  background: var(--lum-brand-soft);
  color: var(--lum-brand-deep);
}

/* ─── Inputs ─── */
.lum-ui-input,
.lum-ui-select {
  width: 100%;
  min-height: 44px;
  padding: 0.58rem 0.88rem;
  border-radius: var(--lum-radius-sm);
  border: 1px solid var(--lum-line);
  background: var(--surface-solid, #fff);
  color: var(--lum-ink);
  font: inherit;
  transition: border-color var(--lum-trans-fast), box-shadow var(--lum-trans-fast);
}
.lum-ui-input:focus,
.lum-ui-select:focus {
  outline: none;
  border-color: var(--lum-brand);
  box-shadow: 0 0 0 3px var(--focus-ring);
}

/* ─── Progress ─── */
.lum-ui-progress {
  height: 6px;
  border-radius: var(--lum-radius-pill);
  background: rgba(15, 23, 42, 0.08);
  overflow: hidden;
}
.lum-ui-progress > i,
.lum-ui-progress > span {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--lum-violet), var(--lum-cyan));
  box-shadow: 0 0 12px rgba(34, 211, 238, 0.45);
  transition: width 0.4s var(--lum-spring);
}

/* ─── Modal / dialog shell ─── */
.lum-ui-modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 400;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  background: rgba(2, 6, 23, 0.72);
  backdrop-filter: blur(8px);
}
.lum-ui-modal {
  width: min(440px, 100%);
  border-radius: var(--lum-radius-lg);
  border: 1px solid var(--lum-immersive-line);
  background: #0f172a;
  color: var(--lum-immersive-text);
  box-shadow: 0 32px 80px rgba(0, 0, 0, 0.55);
  padding: var(--lum-space-5);
}

/* ─── Empty / loading / error ─── */
.lum-ui-empty {
  text-align: center;
  padding: var(--lum-space-8) var(--lum-space-4);
  color: var(--lum-muted);
}
.lum-ui-skeleton {
  border-radius: var(--lum-radius-sm);
  background: linear-gradient(90deg, rgba(15, 23, 42, 0.06) 0%, rgba(15, 23, 42, 0.1) 50%, rgba(15, 23, 42, 0.06) 100%);
  background-size: 200% 100%;
  animation: lumShimmer 1.2s ease-in-out infinite;
}
@keyframes lumShimmer {
  0% { background-position: 100% 0; }
  100% { background-position: -100% 0; }
}
.lum-ui-banner--warn {
  border-radius: var(--lum-radius-md);
  border: 1px solid rgba(251, 191, 36, 0.35);
  background: rgba(251, 191, 36, 0.1);
  color: #fef3c7;
  padding: var(--lum-space-3) var(--lum-space-4);
  font-size: 0.875rem;
}
.lum-ui-banner--error {
  border-radius: var(--lum-radius-md);
  border: 1px solid rgba(248, 113, 113, 0.35);
  background: rgba(127, 29, 29, 0.35);
  color: #fecaca;
  padding: var(--lum-space-3) var(--lum-space-4);
  font-size: 0.875rem;
}

/* ─── Immersive shell (PLG quiz, pre-auth tests) ─── */
body.lum-immersive,
body.tanu-cyber {
  background: var(--lum-immersive-bg) !important;
  color: var(--lum-immersive-muted);
  background-image:
    radial-gradient(ellipse 90% 55% at 50% -15%, rgba(95, 111, 232, 0.18), transparent 55%),
    radial-gradient(ellipse 50% 40% at 100% 100%, rgba(34, 211, 238, 0.06), transparent 50%) !important;
}

body.lum-immersive > header,
body.tanu-cyber > header {
  background: rgba(2, 6, 23, 0.94) !important;
  border-bottom: 1px solid var(--lum-immersive-line) !important;
  box-shadow: none !important;
}
body.lum-immersive > header .lang-switch a,
body.tanu-cyber > header .lang-switch a,
body.lum-immersive > header .nav a,
body.tanu-cyber > header .nav a {
  color: #cbd5e1 !important;
}
body.lum-immersive > header .lang-switch a.active,
body.tanu-cyber > header .lang-switch a.active {
  color: #f8fafc !important;
}
body.lum-immersive > header .btn.secondary,
body.tanu-cyber > header .btn.secondary {
  background: rgba(30, 41, 59, 0.9) !important;
  border-color: var(--lum-immersive-line) !important;
  color: #e2e8f0 !important;
}
body.lum-immersive > header .btn:not(.secondary),
body.tanu-cyber > header .btn:not(.secondary) {
  background: linear-gradient(135deg, var(--lum-brand), var(--lum-brand-deep)) !important;
  color: #fff !important;
}
body.lum-immersive .site-footer,
body.tanu-cyber .site-footer {
  background: rgba(2, 6, 23, 0.92) !important;
  border-color: rgba(255, 255, 255, 0.06) !important;
}

body.lum-match-hub main,
body.lum-immersive.lum-match-hub main,
body.tanu-cyber.lum-match-hub main {
  max-width: 720px;
  margin: 0 auto;
  padding-bottom: 5rem;
}

/* Nested app headers must not inherit site chrome */
body.lum-immersive .tanu-root header,
body.tanu-cyber .tanu-root header,
body.lum-immersive #tanu-onboarding-root header,
body.tanu-cyber #tanu-onboarding-root header,
#tanu-onboarding-root header.lum-plg-topbar {
  position: static !important;
  background: transparent !important;
  box-shadow: none !important;
  border: none !important;
}

body.lum-immersive #tanu-onboarding-root,
body.tanu-cyber #tanu-onboarding-root,
body.lum-immersive #tanu-onboarding-root .tanu-root,
body.tanu-cyber #tanu-onboarding-root .tanu-root {
  color: var(--lum-immersive-muted);
}
body.lum-immersive #tanu-onboarding-root h1,
body.lum-immersive #tanu-onboarding-root h2,
body.lum-immersive #tanu-onboarding-root h3,
body.tanu-cyber #tanu-onboarding-root h1,
body.tanu-cyber #tanu-onboarding-root h2,
body.tanu-cyber #tanu-onboarding-root h3 {
  color: var(--lum-immersive-text);
}

/* Immersive cards (React + legacy tanu-*) */
.lum-ui-card--immersive,
.lum-ui-immersive-card,
.tanu-card,
#tanu-onboarding-root .lum-ui-immersive-card {
  border-radius: 1.25rem;
  padding: 1.35rem 1.15rem;
  background: var(--lum-immersive-card);
  border: 1px solid var(--lum-immersive-line);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.45);
}

/* Immersive choice buttons */
.lum-ui-choice,
.tanu-ab-opt {
  position: relative;
  display: block;
  width: 100%;
  text-align: left;
  padding: 1rem 1.05rem;
  border-radius: 1rem;
  border: 1px solid rgba(148, 163, 184, 0.25);
  background: rgba(15, 23, 42, 0.65);
  color: #e2e8f0;
  font-size: 0.92rem;
  font-weight: 700;
  line-height: 1.4;
  cursor: pointer;
  transition: transform 0.18s var(--lum-ease), border-color 0.18s, box-shadow 0.18s;
}
.lum-ui-choice:hover,
.tanu-ab-opt:hover {
  transform: scale(1.02);
  border-color: rgba(34, 211, 238, 0.55);
  box-shadow: 0 0 20px rgba(124, 58, 237, 0.25);
}
.lum-ui-choice.is-selected,
.tanu-ab-opt.is-selected {
  border-color: var(--lum-mint-bright);
  background: rgba(16, 185, 129, 0.12);
  box-shadow: 0 0 28px rgba(52, 211, 153, 0.35);
}

/* Immersive form controls */
body.lum-immersive #tanu-onboarding-root input[type="text"],
body.lum-immersive #tanu-onboarding-root select,
body.tanu-cyber #tanu-onboarding-root input[type="text"],
body.tanu-cyber #tanu-onboarding-root select,
body.lum-immersive .tanu-root input[type="text"],
body.lum-immersive .tanu-root select,
body.tanu-cyber .tanu-root input[type="text"],
body.tanu-cyber .tanu-root select {
  width: 100% !important;
  max-width: none !important;
  min-height: 42px;
  padding: 0.58rem 0.88rem !important;
  border-radius: 0.5rem !important;
  border: 1px solid rgba(255, 255, 255, 0.14) !important;
  background: rgba(2, 6, 23, 0.92) !important;
  color: var(--lum-immersive-text) !important;
  -webkit-text-fill-color: var(--lum-immersive-text);
  font: inherit;
  box-shadow: none !important;
  color-scheme: dark;
}
body.lum-immersive #tanu-onboarding-root input:focus,
body.lum-immersive #tanu-onboarding-root select:focus,
body.tanu-cyber #tanu-onboarding-root input:focus,
body.tanu-cyber #tanu-onboarding-root select:focus {
  outline: none !important;
  border-color: rgba(34, 211, 238, 0.55) !important;
  box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.22) !important;
}

/* Topbar (PLG) */
.lum-plg-topbar {
  border-radius: var(--lum-radius-lg) !important;
  border: 1px solid var(--lum-immersive-line) !important;
  background: rgba(15, 23, 42, 0.75) !important;
  backdrop-filter: blur(12px);
}

/* Flow pages: hide duplicate chrome when using own top bar */
body.lum-flow-page > header,
body.lum-flow-page .site-footer {
  display: none;
}
body.lum-flow-page .lum-lu-btn,
body.lum-flow-page .octo-mascot {
  display: none !important;
}

/* Alias legacy token namespaces → Lumino */
.pl2-root,
.plg-root {
  --pl2-brand: var(--lum-brand);
  --pl2-brand-deep: var(--lum-brand-deep);
  --pl2-brand-soft: var(--lum-brand-soft);
  --pl2-ink: #0f172a;
  --pl2-muted: #64748b;
  --pl2-radius: var(--lum-radius-lg);
  --plg-brand: var(--lum-brand);
  --plg-brand-deep: var(--lum-brand-deep);
  --plg-brand-soft: var(--lum-brand-soft);
  --plg-ink: #0f172a;
  --plg-muted: #64748b;
  --plg-radius: var(--lum-radius-xl);
}

/* Bridge: global .btn uses same gradient when inside immersive */
body.lum-immersive .btn:not(.secondary),
body.tanu-cyber .btn:not(.secondary) {
  background: linear-gradient(135deg, var(--lum-brand), var(--lum-brand-deep)) !important;
}

@media (max-width: 640px) {
  .lum-ui-btn { min-height: 48px; }
  body.lum-match-hub main { padding-left: 1rem; padding-right: 1rem; }
}