/* =============================================
   ZES Design System — Design Tokens
   Glassmorphic theme, mobile-first
   ============================================= */
:root {
  /* Colors */
  --color-primary: #6366f1;
  --color-primary-hover: #4f46e5;
  --color-primary-light: rgba(99, 102, 241, 0.15);
  --color-secondary: #06b6d4;
  --color-accent: #f59e0b;
  --color-success: #10b981;
  --color-danger: #ef4444;
  --color-warning: #f59e0b;

  /* Glassmorphic backgrounds */
  --glass-bg: rgba(15, 23, 42, 0.75);
  --glass-bg-light: rgba(30, 41, 59, 0.6);
  --glass-border: rgba(99, 102, 241, 0.2);
  --glass-border-hover: rgba(99, 102, 241, 0.4);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);

  /* Text */
  --color-text: #e2e8f0;
  --color-text-secondary: #94a3b8;
  --color-text-muted: #64748b;
  --color-text-inverse: #0f172a;

  /* Background */
  --bg-base: #020617;
  --bg-card: rgba(15, 23, 42, 0.8);
  --bg-input: rgba(30, 41, 59, 0.6);

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;

  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;

  /* Border radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 200ms ease;
  --transition-slow: 300ms ease;

  /* Z-indexes */
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-modal: 300;
  --z-toast: 400;
}

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  background: var(--bg-base);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}
a:hover { color: var(--color-primary-hover); text-decoration: underline; }

/* ============================================
   Container
   ============================================ */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-4);
}

/* ============================================
   Glass Components
   ============================================ */
.glass-header {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--glass-border);
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  padding: var(--space-3) var(--space-4);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.glass-header .brand-logo {
  font-size: var(--text-xl);
  font-weight: 700;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.glass-nav {
  display: flex;
  gap: var(--space-2);
  align-items: center;
}

.glass-nav a {
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  transition: all var(--transition-fast);
}
.glass-nav a:hover,
.glass-nav a.active {
  background: var(--color-primary-light);
  color: var(--color-primary);
  text-decoration: none;
}

.glass-card {
  background: var(--glass-bg-light);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--glass-shadow);
  transition: all var(--transition-base);
}
.glass-card:hover {
  border-color: var(--glass-border-hover);
  transform: translateY(-1px);
}

.glass-footer {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-top: 1px solid var(--glass-border);
  padding: var(--space-8) var(--space-4);
  text-align: center;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

.glass-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-5);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 500;
  cursor: pointer;
  border: 1px solid var(--glass-border);
  background: var(--glass-bg-light);
  color: var(--color-text);
  transition: all var(--transition-fast);
  text-decoration: none;
}
.glass-btn:hover {
  background: var(--color-primary-light);
  border-color: var(--color-primary);
  color: var(--color-primary);
  text-decoration: none;
  transform: translateY(-1px);
}
.glass-btn.primary {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: white;
}
.glass-btn.primary:hover {
  background: var(--color-primary-hover);
  opacity: 0.95;
}
.glass-btn.danger {
  border-color: var(--color-danger);
  color: var(--color-danger);
}
.glass-btn.danger:hover {
  background: rgba(239, 68, 68, 0.15);
}
.glass-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

/* ============================================
   Page Layout
   ============================================ */
.page-body {
  padding: var(--space-6) 0;
  min-height: calc(100vh - 140px);
}

.page-title {
  font-size: var(--text-2xl);
  font-weight: 700;
  margin-bottom: var(--space-6);
  background: linear-gradient(135deg, var(--color-text), var(--color-primary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Grid */
.grid { display: grid; gap: var(--space-4); }
.grid-2 { grid-template-columns: 1fr 1fr; }
.grid-3 { grid-template-columns: 1fr 1fr 1fr; }
.grid-4 { grid-template-columns: 1fr 1fr 1fr 1fr; }

/* ============================================
   Status Indicators
   ============================================ */
.status-dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: var(--radius-full);
  margin-right: var(--space-2);
}
.status-dot.ok { background: var(--color-success); box-shadow: 0 0 6px var(--color-success); }
.status-dot.error { background: var(--color-danger); box-shadow: 0 0 6px var(--color-danger); }
.status-dot.warning { background: var(--color-warning); box-shadow: 0 0 6px var(--color-warning); }

/* ============================================
   Form Elements
   ============================================ */
.glass-input {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  background: var(--bg-input);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  font-size: var(--text-sm);
  font-family: var(--font-family);
  transition: all var(--transition-fast);
  outline: none;
}
.glass-input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px var(--color-primary-light);
}

/* ============================================
   Responsive — Mobile First
   ============================================ */
@media (max-width: 768px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .container { padding: 0 var(--space-3); }
  .page-body { padding: var(--space-4) 0; }
  .glass-header { padding: var(--space-2) var(--space-3); }
  .glass-header .brand-logo { font-size: var(--text-lg); }
  .page-title { font-size: var(--text-xl); }
  .glass-card { padding: var(--space-4); }
}

@media (max-width: 480px) {
  html { font-size: 15px; }
  .glass-nav { gap: var(--space-1); }
  .glass-nav a { padding: var(--space-1) var(--space-2); font-size: var(--text-xs); }
  .glass-btn { padding: var(--space-2) var(--space-3); font-size: var(--text-xs); }
}

@media (max-width: 360px) {
  html { font-size: 14px; }
  .glass-header { flex-direction: column; gap: var(--space-2); }
  .glass-nav { flex-wrap: wrap; justify-content: center; }
}