/* ============================================================
   Aqara Space Intelligence Platform — Design System
   ============================================================ */

:root {
  /* Core Palette */
  --bg-deep: #08080f;
  --bg-primary: #0d0d18;
  --bg-secondary: #12121f;
  --bg-card: #16162a;
  --bg-card-hover: #1e1e38;
  --bg-surface: #1a1a30;
  --bg-input: #12121f;

  /* Aqara Brand */
  --aqara-green: #00d4aa;
  --aqara-green-dim: #00b894;
  --aqara-teal: #00cec9;
  --aqara-dark: #0a1628;

  /* Accent */
  --accent-gold: #d4a574;
  --accent-gold-light: #e8c9a0;
  --accent-blue: #4a9eff;
  --accent-purple: #8b5cf6;
  --accent-orange: #f59e0b;
  --accent-rose: #f43f5e;

  /* Text */
  --text-primary: #ffffff;
  --text-secondary: #b0b0c8;
  --text-tertiary: #6b6b85;
  --text-muted: #4a4a60;

  /* Borders */
  --border-default: #1e1e38;
  --border-hover: #2a2a48;
  --border-active: #00d4aa40;
  --border-glow: #00d4aa80;
  --store-accent: #00d4aa;

  /* Spacing Scale */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;

  /* Radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-card: 0 4px 24px rgba(0,0,0,0.4);
  --shadow-glow-green: 0 0 20px rgba(0,212,170,0.15);
  --shadow-glow-blue: 0 0 20px rgba(74,158,255,0.15);
  --shadow-glow-purple: 0 0 20px rgba(139,92,246,0.15);
  --shadow-elevated: 0 8px 40px rgba(0,0,0,0.6);

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "SF Pro Display", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "SF Mono", "Fira Code", "Consolas", monospace;

  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --duration-fast: 150ms;
  --duration-normal: 250ms;
  --duration-slow: 400ms;

  /* Layout */
  --header-height: 64px;
  --sidebar-width: 260px;
  --content-max: 1400px;
}

/* ============================================================
   Reset & Base
   ============================================================ */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-deep);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  outline: none;
  background: none;
  color: inherit;
}

img {
  max-width: 100%;
  display: block;
}

ul, ol { list-style: none; }

/* ============================================================
   Typography
   ============================================================ */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -0.02em;
}

h1 { font-size: 3rem; }
h2 { font-size: 2.25rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

.text-gradient {
  background: linear-gradient(135deg, var(--aqara-green) 0%, var(--aqara-teal) 50%, var(--accent-blue) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.text-gradient-gold {
  background: linear-gradient(135deg, var(--accent-gold) 0%, var(--accent-gold-light) 50%, #f0c080 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.text-gradient-purple {
  background: linear-gradient(135deg, var(--accent-purple) 0%, #a78bfa 50%, var(--accent-blue) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ============================================================
   Buttons
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 10px 24px;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 500;
  transition: all var(--duration-fast) var(--ease-out);
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--aqara-green), var(--aqara-teal));
  color: #000;
  box-shadow: var(--shadow-glow-green);
}
.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 0 30px rgba(0,212,170,0.3);
}

.btn-secondary {
  background: var(--bg-card);
  border: 1px solid var(--border-default);
  color: var(--text-primary);
}
.btn-secondary:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
}

.btn-ghost {
  color: var(--text-secondary);
  padding: 6px 12px;
}
.btn-ghost:hover { color: var(--text-primary); background: var(--bg-card); }

.btn-lg { padding: 14px 32px; font-size: 1rem; border-radius: var(--radius-lg); }
.btn-sm { padding: 6px 14px; font-size: 0.8rem; }

/* ============================================================
   Cards
   ============================================================ */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  transition: all var(--duration-normal) var(--ease-out);
}
.card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  box-shadow: var(--shadow-card);
  transform: translateY(-2px);
}

.card-glass {
  background: rgba(22, 22, 42, 0.6);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius-lg);
}

/* ============================================================
   Grid & Layout
   ============================================================ */
.container {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }
.gap-xl { gap: var(--space-xl); }

.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-lg); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-lg); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-lg); }

@media (max-width: 1024px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .container { padding: 0 var(--space-md); }
}

/* ============================================================
   Animations
   ============================================================ */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}
@keyframes glowPulse {
  0%, 100% { box-shadow: var(--shadow-glow-green); }
  50% { box-shadow: 0 0 35px rgba(0,212,170,0.35); }
}
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}
@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

.animate-in {
  animation: fadeInUp 0.6s var(--ease-out) forwards;
  opacity: 0;
}

/* ============================================================
   Scrollbar
   ============================================================ */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-hover); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-tertiary); }

/* ============================================================
   Utility
   ============================================================ */
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); }
.text-center { text-align: center; }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }
.mt-2xl { margin-top: var(--space-2xl); }
.mb-lg { margin-bottom: var(--space-lg); }