/* ============================================================
   ArchiTail AI — 5-Tier Glass Material System
   ============================================================
   DEFAULT: Light theme (clean, architectural, premium)
   Opt-in: Dark theme via [data-theme="dark"]
   ============================================================ */

/* ------------------------------------------------------------
   LIGHT THEME (DEFAULT)
   Clean white/warm-gray glass on off-white backgrounds
   ------------------------------------------------------------ */

/* Tier 1 — Structural (sidebars, top bars, bottom bars) */
.glass-structural {
  -webkit-backdrop-filter: blur(24px) saturate(1.3);
  backdrop-filter: blur(24px) saturate(1.3);
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid rgba(0, 0, 0, 0.06);
  border-radius: 0;
}

/* Tier 2 — Surface (floating panels, modals, dropdowns) */
.glass-surface {
  -webkit-backdrop-filter: blur(20px) saturate(1.2);
  backdrop-filter: blur(20px) saturate(1.2);
  background: rgba(255, 255, 255, 0.75);
  border: 1px solid rgba(0, 0, 0, 0.08);
  border-radius: 12px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.06), inset 0 1px 0 rgba(255, 255, 255, 0.70);
}

/* Tier 3 — Interactive (buttons, inputs, controls) */
.glass-interactive {
  -webkit-backdrop-filter: blur(16px) saturate(1.15);
  backdrop-filter: blur(16px) saturate(1.15);
  background: rgba(0, 0, 0, 0.03);
  border: 1px solid rgba(0, 0, 0, 0.10);
  border-radius: 8px;
  transition: all 120ms ease-out;
}

/* Tier 4 — Ephemeral (tooltips, toasts) */
.glass-ephemeral {
  -webkit-backdrop-filter: blur(12px) saturate(1.1);
  backdrop-filter: blur(12px) saturate(1.1);
  background: rgba(255, 255, 255, 0.88);
  border: 1px solid rgba(0, 0, 0, 0.06);
  border-radius: 8px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
}

/* Tier 5 — AI (prompt bar, AI suggestions) */
.glass-ai {
  -webkit-backdrop-filter: blur(20px) saturate(1.25);
  backdrop-filter: blur(20px) saturate(1.25);
  background: rgba(143, 175, 209, 0.06);
  border: 1px solid rgba(143, 175, 209, 0.14);
  border-radius: 12px;
  box-shadow: inset 0 0 0 1px rgba(143, 175, 209, 0.04);
}

/* ------------------------------------------------------------
   INTERACTIVE STATES (Light)
   ------------------------------------------------------------ */

.glass-interactive:hover {
  background: rgba(0, 0, 0, 0.06);
  border-color: rgba(0, 0, 0, 0.14);
}

.glass-interactive:active {
  background: rgba(0, 0, 0, 0.08);
  border-color: rgba(0, 0, 0, 0.18);
  transform: scale(0.98);
}

/* ------------------------------------------------------------
   DARK THEME — [data-theme="dark"]
   ------------------------------------------------------------ */

[data-theme="dark"] .glass-structural {
  background: rgba(32, 32, 36, 0.82);
  border-color: rgba(255, 255, 255, 0.08);
}

[data-theme="dark"] .glass-surface {
  background: rgba(42, 42, 46, 0.72);
  border-color: rgba(255, 255, 255, 0.10);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.24), inset 0 1px 0 rgba(255, 255, 255, 0.06);
}

[data-theme="dark"] .glass-interactive {
  background: rgba(255, 255, 255, 0.07);
  border-color: rgba(255, 255, 255, 0.12);
}

[data-theme="dark"] .glass-ephemeral {
  background: rgba(42, 42, 46, 0.88);
  border-color: rgba(255, 255, 255, 0.08);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.18);
}

[data-theme="dark"] .glass-ai {
  background: rgba(143, 175, 209, 0.07);
  border-color: rgba(143, 175, 209, 0.14);
}

[data-theme="dark"] .glass-interactive:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.18);
}

[data-theme="dark"] .glass-interactive:active {
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.20);
  transform: scale(0.98);
}

/* ------------------------------------------------------------
   FALLBACKS — browsers without backdrop-filter
   ------------------------------------------------------------ */

@supports not (backdrop-filter: blur(1px)) {
  .glass-structural { background: #F5F5F0; }
  .glass-surface { background: #FFFFFF; }
  .glass-interactive { background: #EDEDEA; }
  .glass-ephemeral { background: #FFFFFF; }
  .glass-ai { background: #EEF3F9; }

  [data-theme="dark"] .glass-structural { background: #242428; }
  [data-theme="dark"] .glass-surface { background: #2A2A2E; }
  [data-theme="dark"] .glass-interactive { background: #303035; }
  [data-theme="dark"] .glass-ephemeral { background: #2A2A2E; }
  [data-theme="dark"] .glass-ai { background: #1E2430; }
}

/* ------------------------------------------------------------
   GLASS STACKING — reduce blur for layered elements
   ------------------------------------------------------------ */

.glass-stacked.glass-structural { backdrop-filter: blur(18px) saturate(1.2); -webkit-backdrop-filter: blur(18px) saturate(1.2); }
.glass-stacked.glass-surface { backdrop-filter: blur(15px) saturate(1.15); -webkit-backdrop-filter: blur(15px) saturate(1.15); }
.glass-stacked.glass-interactive { backdrop-filter: blur(12px) saturate(1.10); -webkit-backdrop-filter: blur(12px) saturate(1.10); }
.glass-stacked.glass-ephemeral { backdrop-filter: blur(9px) saturate(1.05); -webkit-backdrop-filter: blur(9px) saturate(1.05); }
.glass-stacked.glass-ai { backdrop-filter: blur(15px) saturate(1.20); -webkit-backdrop-filter: blur(15px) saturate(1.20); }