/* ============================================================================
   ShiftPulse — Theme Presets (Phase 73)
   ============================================================================
   Eight premium palettes, selectable per-user via Settings → Appearance.
   Each preset overrides `--primary`, `--primary-hover`, `--primary-soft`,
   `--accent`, `--accent-hover`, and a `--gradient-hero` used by the auth
   pages and decorative surfaces.

   Activated via `data-preset` attribute on <html>:
     <html data-theme="light" data-preset="royal">
   The base `data-theme` (light/dark/auto) is preserved for foreground colors
   and surface elevation — the preset only overrides the brand accents.
   ============================================================================ */

/* ---------------- Preset: NAVY (default — matches current brand) ---------- */
:root[data-preset="navy"] {
  --primary:        #0B2545;
  --primary-hover:  #13315C;
  --primary-soft:   rgba(11, 37, 69, 0.10);
  --accent:         #D4A537;
  --accent-hover:   #C09525;
  --gradient-hero:  linear-gradient(135deg, #0B2545 0%, #13315C 45%, #284B6E 100%);
  --gradient-glow:  radial-gradient(circle at 20% 80%, rgba(212,165,55,0.20), transparent 55%),
                    radial-gradient(circle at 80% 20%, rgba(91,141,239,0.18), transparent 55%);
}
:root[data-theme="dark"][data-preset="navy"] {
  --primary:        #5B8DEF;
  --primary-hover:  #7BA5F2;
  --accent:         #E8C97A;
}

/* ---------------- Preset: ROYAL PURPLE -------------------------------------- */
:root[data-preset="royal"] {
  --primary:        #6D28D9;
  --primary-hover:  #5B21B6;
  --primary-soft:   rgba(109, 40, 217, 0.10);
  --accent:         #EC4899;
  --accent-hover:   #DB2777;
  --gradient-hero:  linear-gradient(135deg, #4C1D95 0%, #6D28D9 45%, #A78BFA 100%);
  --gradient-glow:  radial-gradient(circle at 25% 75%, rgba(236,72,153,0.28), transparent 55%),
                    radial-gradient(circle at 75% 25%, rgba(167,139,250,0.30), transparent 55%);
}
:root[data-theme="dark"][data-preset="royal"] {
  --primary:        #A78BFA;
  --primary-hover:  #C4B5FD;
  --accent:         #F472B6;
}

/* ---------------- Preset: OCEAN TEAL ---------------------------------------- */
:root[data-preset="ocean"] {
  --primary:        #0891B2;
  --primary-hover:  #0E7490;
  --primary-soft:   rgba(8, 145, 178, 0.10);
  --accent:         #14B8A6;
  --accent-hover:   #0F9990;
  --gradient-hero:  linear-gradient(135deg, #155E75 0%, #0891B2 45%, #22D3EE 100%);
  --gradient-glow:  radial-gradient(circle at 20% 80%, rgba(20,184,166,0.28), transparent 55%),
                    radial-gradient(circle at 80% 20%, rgba(34,211,238,0.26), transparent 55%);
}
:root[data-theme="dark"][data-preset="ocean"] {
  --primary:        #22D3EE;
  --primary-hover:  #67E8F9;
  --accent:         #2DD4BF;
}

/* ---------------- Preset: SUNSET ORANGE ------------------------------------- */
:root[data-preset="sunset"] {
  --primary:        #EA580C;
  --primary-hover:  #C2410C;
  --primary-soft:   rgba(234, 88, 12, 0.10);
  --accent:         #F59E0B;
  --accent-hover:   #D97706;
  --gradient-hero:  linear-gradient(135deg, #9A3412 0%, #EA580C 50%, #FBBF24 100%);
  --gradient-glow:  radial-gradient(circle at 25% 75%, rgba(251,191,36,0.32), transparent 55%),
                    radial-gradient(circle at 75% 25%, rgba(239,68,68,0.24), transparent 55%);
}
:root[data-theme="dark"][data-preset="sunset"] {
  --primary:        #FB923C;
  --primary-hover:  #FDBA74;
  --accent:         #FBBF24;
}

/* ---------------- Preset: FOREST EMERALD ------------------------------------ */
:root[data-preset="emerald"] {
  --primary:        #059669;
  --primary-hover:  #047857;
  --primary-soft:   rgba(5, 150, 105, 0.10);
  --accent:         #84CC16;
  --accent-hover:   #65A30D;
  --gradient-hero:  linear-gradient(135deg, #064E3B 0%, #059669 45%, #34D399 100%);
  --gradient-glow:  radial-gradient(circle at 30% 70%, rgba(132,204,22,0.28), transparent 55%),
                    radial-gradient(circle at 70% 30%, rgba(52,211,153,0.30), transparent 55%);
}
:root[data-theme="dark"][data-preset="emerald"] {
  --primary:        #34D399;
  --primary-hover:  #6EE7B7;
  --accent:         #A3E635;
}

/* ---------------- Preset: ROSE PINK ----------------------------------------- */
:root[data-preset="rose"] {
  --primary:        #E11D48;
  --primary-hover:  #BE123C;
  --primary-soft:   rgba(225, 29, 72, 0.10);
  --accent:         #F472B6;
  --accent-hover:   #EC4899;
  --gradient-hero:  linear-gradient(135deg, #881337 0%, #E11D48 50%, #FB7185 100%);
  --gradient-glow:  radial-gradient(circle at 20% 80%, rgba(244,114,182,0.30), transparent 55%),
                    radial-gradient(circle at 80% 20%, rgba(251,113,133,0.28), transparent 55%);
}
:root[data-theme="dark"][data-preset="rose"] {
  --primary:        #FB7185;
  --primary-hover:  #FDA4AF;
  --accent:         #F9A8D4;
}

/* ---------------- Preset: SLATE MONO (minimal, professional) --------------- */
:root[data-preset="slate"] {
  --primary:        #1F2937;
  --primary-hover:  #111827;
  --primary-soft:   rgba(31, 41, 55, 0.10);
  --accent:         #6B7280;
  --accent-hover:   #4B5563;
  --gradient-hero:  linear-gradient(135deg, #111827 0%, #1F2937 45%, #4B5563 100%);
  --gradient-glow:  radial-gradient(circle at 25% 75%, rgba(156,163,175,0.18), transparent 55%),
                    radial-gradient(circle at 75% 25%, rgba(209,213,219,0.16), transparent 55%);
}
:root[data-theme="dark"][data-preset="slate"] {
  --primary:        #9CA3AF;
  --primary-hover:  #D1D5DB;
  --accent:         #6B7280;
}

/* ---------------- Preset: CYBER NEON (dark-leaning, vivid) ----------------- */
:root[data-preset="cyber"] {
  --primary:        #7C3AED;
  --primary-hover:  #6D28D9;
  --primary-soft:   rgba(124, 58, 237, 0.12);
  --accent:         #06B6D4;
  --accent-hover:   #0891B2;
  --gradient-hero:  linear-gradient(135deg, #1E1B4B 0%, #312E81 35%, #7C3AED 70%, #06B6D4 100%);
  --gradient-glow:  radial-gradient(circle at 20% 80%, rgba(6,182,212,0.36), transparent 55%),
                    radial-gradient(circle at 80% 20%, rgba(124,58,237,0.34), transparent 55%),
                    radial-gradient(circle at 50% 50%, rgba(236,72,153,0.18), transparent 60%);
}
:root[data-theme="dark"][data-preset="cyber"] {
  --primary:        #A78BFA;
  --primary-hover:  #C4B5FD;
  --accent:         #22D3EE;
}

/* ============================================================================
   AUTH SHELL — Centered card layout used by login, MFA, reauth pages
   ============================================================================
   Replaces the broken split layout. Single full-viewport gradient with a
   centered card. Works perfectly in LTR and RTL — no directional assumptions.
   ============================================================================ */
.auth-shell {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: var(--gradient-hero, linear-gradient(135deg, #0B2545 0%, #13315C 100%));
  position: relative;
  overflow: hidden;
}
.auth-shell::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-glow, none);
  pointer-events: none;
  animation: auth-glow-drift 18s ease-in-out infinite alternate;
}
.auth-shell::after {
  /* Subtle dot pattern overlay */
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255,255,255,0.06) 1px, transparent 1px);
  background-size: 24px 24px;
  pointer-events: none;
  opacity: 0.5;
}
@keyframes auth-glow-drift {
  0%   { transform: translate3d(0, 0, 0) scale(1); }
  100% { transform: translate3d(-4%, 3%, 0) scale(1.08); }
}

.auth-card {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: 440px;
  background: var(--bg-elev-1);
  border-radius: var(--radius-xl);
  box-shadow: 0 32px 64px -12px rgba(0,0,0,0.35), 0 0 0 1px rgba(255,255,255,0.05);
  padding: 36px 36px 28px;
  animation: auth-card-rise 480ms cubic-bezier(0.16, 1, 0.3, 1);
}
@media (max-width: 480px) {
  .auth-card { padding: 28px 22px 22px; border-radius: var(--radius-lg); }
}
@keyframes auth-card-rise {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

.auth-card .auth-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
}
.auth-card .auth-logo-mark {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  background: var(--gradient-hero);
  display: grid;
  place-items: center;
  color: #fff;
  box-shadow: 0 8px 16px -4px var(--primary-soft, rgba(11,37,69,0.25));
}
.auth-card h1.auth-title {
  font-size: 24px;
  font-weight: 700;
  text-align: center;
  margin: 0 0 6px;
  letter-spacing: -0.02em;
  color: var(--text);
}
.auth-card .auth-subtitle {
  font-size: 14px;
  color: var(--text-muted);
  text-align: center;
  margin: 0 0 26px;
  line-height: 1.5;
}
.auth-card .auth-identity {
  background: var(--bg-subtle);
  border-radius: var(--radius);
  padding: 10px 14px;
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: var(--text);
  border: 1px solid var(--border);
}
.auth-card .auth-identity .lbl { color: var(--text-muted); font-size: 12px; }

/* Big code input used by MFA and reauth */
.auth-card .auth-code-input {
  width: 100%;
  font-size: 28px;
  text-align: center;
  letter-spacing: 0.45em;
  padding: 14px 14px;
  font-family: var(--font-mono);
  font-weight: 700;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-elev-1);
  color: var(--text);
  transition: border-color var(--tx-base), box-shadow var(--tx-base);
}
.auth-card .auth-code-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 4px var(--primary-soft);
}

.auth-card .auth-alt-methods {
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid var(--border);
}
.auth-card .auth-alt-methods .heading {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  font-weight: 600;
  margin-bottom: 8px;
}
.auth-card .auth-alt-methods a,
.auth-card .auth-alt-methods button {
  display: flex;
  gap: 8px;
  align-items: center;
  background: none;
  border: none;
  padding: 6px 0;
  color: var(--primary);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
}
.auth-card .auth-alt-methods a:hover,
.auth-card .auth-alt-methods button:hover { color: var(--primary-hover); }

/* ============================================================================
   APP FOOTER (Phase 73)
   ============================================================================ */
.app-footer {
  padding: 22px 28px;
  border-top: 1px solid var(--border);
  background: var(--bg-elev-1);
  color: var(--text-muted);
  font-size: 12.5px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: auto;
}
.app-footer .copy {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}
.app-footer .copy a {
  color: var(--primary);
  text-decoration: none;
  font-weight: 600;
}
.app-footer .copy a:hover { text-decoration: underline; }
.app-footer .build {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--text-subtle);
}
.app-footer .build .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--success);
}
.auth-footer {
  position: absolute;
  bottom: 18px;
  left: 0;
  right: 0;
  text-align: center;
  z-index: 2;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.75);
}
.auth-footer a { color: rgba(255, 255, 255, 0.95); font-weight: 600; text-decoration: none; }
.auth-footer a:hover { text-decoration: underline; }

/* ============================================================================
   SETTINGS HUB
   ============================================================================ */
.settings-hub {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}
.settings-tile {
  background: var(--bg-elev-1);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 22px;
  text-decoration: none;
  color: var(--text);
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: transform var(--tx-base), box-shadow var(--tx-base), border-color var(--tx-base);
  position: relative;
  overflow: hidden;
}
.settings-tile::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--tile-tint, transparent);
  opacity: 0.06;
  pointer-events: none;
}
.settings-tile:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary);
}
.settings-tile-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: var(--tile-tint, var(--primary-soft));
  color: var(--tile-color, var(--primary));
}
.settings-tile-title {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 0;
  color: var(--text);
}
.settings-tile-desc {
  font-size: 12.5px;
  color: var(--text-muted);
  line-height: 1.55;
  margin: 0;
}
.settings-tile-foot {
  margin-top: auto;
  padding-top: 8px;
  font-size: 11.5px;
  color: var(--text-subtle);
  display: flex;
  align-items: center;
  gap: 4px;
}
.settings-section-heading {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-subtle);
  font-weight: 700;
  margin: 28px 0 12px;
}
.settings-section-heading:first-child { margin-top: 4px; }

/* Theme preset picker */
.theme-presets {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 12px;
}
.theme-preset {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 14px 10px 12px;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  background: var(--bg-elev-1);
  transition: border-color var(--tx-base), transform var(--tx-base);
  text-align: center;
}
.theme-preset:hover { transform: translateY(-2px); }
.theme-preset.active { border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-soft); }
.theme-preset .swatch {
  width: 100%;
  aspect-ratio: 16 / 10;
  border-radius: 8px;
  position: relative;
  overflow: hidden;
}
.theme-preset .swatch::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 20% 80%, rgba(255,255,255,0.2), transparent 55%),
              radial-gradient(circle at 80% 20%, rgba(255,255,255,0.15), transparent 55%);
}
.theme-preset .name { font-size: 12.5px; font-weight: 600; color: var(--text); }
.theme-preset input { display: none; }
