/* =========================================
   BASE — Proměnné, reset, scrollbar, utilities
   =========================================
   Obsah:
   - CSS proměnné (barvy, fonty, velikosti)
   - Reset
   - Scrollbar
   - Skeleton loading
   - Utility třídy
   ========================================= */

/* =========================================
   CSS PROMĚNNÉ & RESET
   ========================================= */
:root {
  --color-bg: #0d0f14;
  --color-surface: #141720;
  --color-surface-2: #1c2030;
  --color-surface-3: #232840;
  --color-border: rgba(255,255,255,0.07);
  --color-border-light: rgba(255,255,255,0.12);
  --color-text: #e8eaf0;
  --color-text-muted: #7a82a0;
  --color-text-dim: #4a5070;
  --color-accent: #3d7eff;
  --color-accent-hover: #5590ff;
  --color-accent-glow: rgba(61, 126, 255, 0.15);
  --color-success: #2ecc71;
  --color-warning: #f39c12;
  --color-danger: #e74c3c;
  --color-disabled: #2a2f45;
  --color-disabled-text: #3d4560;

  /* Hover barva — světlejší než surface-2, jemný modravý nádech */
  --color-hover: #252a42;

  --font-main: 'DM Sans', sans-serif;
  --font-mono: 'DM Mono', monospace;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.5);
  --transition: all 0.2s ease;
  --header-height: 56px;
  --sidebar-left: 280px;
  --sidebar-right: 360px;
}

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

html, body {
  height: 100%;
  font-family: var(--font-main);
  background: var(--color-bg);
  color: var(--color-text);
  font-size: 14px;
  line-height: 1.5;
  overflow: hidden;
}

/* =========================================
   SCROLLBAR
   ========================================= */
::-webkit-scrollbar { width: 4px; height: 4px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--color-border-light); border-radius: 2px; }
::-webkit-scrollbar-thumb:hover { background: var(--color-text-dim); }

/* =========================================
   SKELETON LOADING
   ========================================= */
.skeleton {
  background: linear-gradient(
    90deg,
    var(--color-surface-2) 25%,
    var(--color-surface-3) 50%,
    var(--color-surface-2) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: 4px;
}

@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* =========================================
   UTILITIES
   ========================================= */
.hidden { display: none !important; }
.flex { display: flex; }
.items-center { align-items: center; }
.gap-2 { gap: 8px; }