@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@300;400;500;600;700&display=swap');

:root {
  --color-bg-page: #07070f;
  --color-bg-input-bar: rgba(255, 255, 255, 0.06);
  --color-border-input-bar: rgba(255, 255, 255, 0.10);
  --color-primary: #6c63ff;
  --color-text-primary: #f1f0ff;
  --color-text-secondary: #8b8ea8;
  --color-text-disabled: #4c4f6b;
  --color-bg-hover: rgba(255, 255, 255, 0.08);
  --color-bg-dropdown: rgba(13, 13, 26, 0.92);
  --color-bg-upload: rgba(255, 255, 255, 0.04);
  --color-border-upload: rgba(255, 255, 255, 0.08);
  --color-btn-send-disabled: #3a3a4a;
  --color-btn-send-active: #6c63ff;
  --color-sidebar-bg: rgba(7, 7, 15, 0.80);

  /* Phase 3: Admin theme tokens */
  --color-bg-sidebar: rgba(7, 7, 15, 0.80);
  --color-sidebar-active: rgba(255, 255, 255, 0.08);
  --color-sidebar-hover: rgba(255, 255, 255, 0.04);
  --color-bg-card: rgba(255, 255, 255, 0.06);
  --color-border-card: rgba(255, 255, 255, 0.10);
  --color-success: #00b894;
  --color-danger: #e74c3c;
  --color-warning: #f39c12;
  --radius-card: 12px;
  --sidebar-width: 240px;
  --sidebar-collapsed-width: 64px;

  --radius-input-bar: 20px;
  --radius-btn: 8px;
  --radius-send-btn: 50%;
  --radius-thumbnail: 8px;
  --radius-dropdown: 12px;

  --input-bar-max-width: 900px;
  --send-btn-size: 36px;
  --thumbnail-size: 80px;
  --toolbar-height: 44px;
  --toolbar-btn-height: 32px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html, body, #root {
  height: 100%;
  overflow: hidden;
}

body {
  font-family: 'Noto Sans SC', system-ui, -apple-system, sans-serif;
  background: var(--color-bg-page);
  color: var(--color-text-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Scrollbar: Firefox */
* {
  scrollbar-width: thin;
  scrollbar-color: transparent transparent;
}
*:hover {
  scrollbar-color: rgba(255, 255, 255, 0.1) transparent;
}

/* Scrollbar: Webkit — hidden by default, visible on hover */
::-webkit-scrollbar {
  width: 6px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: transparent;
  border-radius: 3px;
  transition: background 0.2s;
}
*:hover::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.1);
}
*:hover::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.2);
}

/* ═══════════════════════════════════════════
   LAYER 1: Aurora Gradient Background
   ═══════════════════════════════════════════ */
.aurora-bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
}

.aurora-bg::before,
.aurora-bg::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  filter: blur(110px);
  opacity: 0.4;
  will-change: transform;
}

.aurora-bg::before {
  width: 600px;
  height: 600px;
  top: -10%;
  right: -5%;
  background: radial-gradient(circle, rgba(108, 99, 255, 0.6) 0%, transparent 70%);
  animation: aurora-drift-1 20s ease-in-out infinite alternate;
}

.aurora-bg::after {
  width: 500px;
  height: 500px;
  bottom: -5%;
  left: -5%;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.5) 0%, transparent 70%);
  animation: aurora-drift-2 25s ease-in-out infinite alternate;
}

@keyframes aurora-drift-1 {
  0% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(-15vw, 10vh) scale(1.1); }
  66% { transform: translate(-5vw, 25vh) scale(0.95); }
  100% { transform: translate(-20vw, 15vh) scale(1.05); }
}

@keyframes aurora-drift-2 {
  0% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(10vw, -15vh) scale(1.15); }
  66% { transform: translate(20vw, -5vh) scale(0.9); }
  100% { transform: translate(15vw, -20vh) scale(1.1); }
}

.aurora-blob-3 {
  position: absolute;
  width: 400px;
  height: 400px;
  top: 40%;
  left: 50%;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.35) 0%, transparent 70%);
  filter: blur(100px);
  opacity: 0.3;
  will-change: transform;
  animation: aurora-drift-3 30s ease-in-out infinite alternate;
  pointer-events: none;
}

@keyframes aurora-drift-3 {
  0% { transform: translate(-50%, -50%) scale(1); }
  50% { transform: translate(-30%, -60%) scale(1.2); }
  100% { transform: translate(-70%, -40%) scale(0.85); }
}

/* ═══════════════════════════════════════════
   LAYER 2: Noise Texture Overlay
   ═══════════════════════════════════════════ */
.noise-overlay {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  opacity: 0.03;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 256px 256px;
}

/* ═══════════════════════════════════════════
   LAYER 3: Mouse-tracking Glow
   ═══════════════════════════════════════════ */
.cursor-glow {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background: radial-gradient(
    600px circle at var(--mouse-x, 50%) var(--mouse-y, 50%),
    rgba(108, 99, 255, 0.06) 0%,
    transparent 60%
  );
  transition: opacity 0.3s ease;
}

/* ═══════════════════════════════════════════
   LAYER 4: Subtle grid pattern
   ═══════════════════════════════════════════ */
.grid-pattern {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 50%, black 20%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 50%, black 20%, transparent 100%);
}

/* ═══════════════════════════════════════════
   Reduced motion
   ═══════════════════════════════════════════ */
@media (prefers-reduced-motion: reduce) {
  .aurora-bg::before,
  .aurora-bg::after,
  .aurora-blob-3 {
    animation: none !important;
    opacity: 0.2 !important;
  }
}
