/* ==========================================================================
   AWS Lightsail Console - base.css
   Modern Dark Console Theme, Typography, CSS Variables & Reset
   ========================================================================== */

:root {
  /* Color Palette - Dark Console Theme */
  --bg-primary: #0b0e14;
  --bg-secondary: #161b22;
  --bg-tertiary: #21262d;
  --bg-elevated: #1c2128;
  --bg-hover: #262c36;
  --bg-active: #2f3642;

  /* Borders */
  --border: #30363d;
  --border-light: #3d444d;
  --border-subtle: #21262d;
  --border-focus: #58a6ff;

  /* Typography Colors */
  --text-primary: #f0f6fc;
  --text-secondary: #8b949e;
  --text-muted: #6e7681;
  --text-inverse: #0b0e14;

  /* Accent & Functional Colors */
  --primary: #3b82f6;
  --primary-hover: #2563eb;
  --primary-subtle: rgba(59, 130, 246, 0.15);
  --primary-glow: rgba(59, 130, 246, 0.35);

  --accent: #10b981;
  --accent-hover: #059669;
  --accent-subtle: rgba(16, 185, 129, 0.15);

  --success: #22c55e;
  --success-hover: #16a34a;
  --success-subtle: rgba(34, 197, 94, 0.15);

  --warning: #f59e0b;
  --warning-hover: #d97706;
  --warning-subtle: rgba(245, 158, 11, 0.15);

  --danger: #ef4444;
  --danger-hover: #dc2626;
  --danger-subtle: rgba(239, 68, 68, 0.15);
  --danger-glow: rgba(239, 68, 68, 0.35);

  --info: #38bdf8;
  --info-subtle: rgba(56, 189, 248, 0.15);

  --purple: #a855f7;
  --purple-subtle: rgba(168, 85, 247, 0.15);

  /* Geometry & Spacing */
  --radius-sm: 4px;
  --radius: 8px;
  --radius-md: 10px;
  --radius-lg: 12px;
  --radius-full: 9999px;

  --sidebar-width: 240px;
  --sidebar-collapsed-width: 64px;
  --topbar-height: 56px;
  --drawer-height-collapsed: 38px;
  --drawer-height-expanded: 260px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow: 0 4px 14px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 10px 28px rgba(0, 0, 0, 0.6);
  --shadow-modal: 0 20px 40px rgba(0, 0, 0, 0.7);

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', Consolas, Monaco, monospace;

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 0.3s cubic-bezier(0.16, 1, 0.3, 1);

  color-scheme: dark;
}

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

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 13px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Custom Scrollbars */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* Selection */
::selection {
  background: var(--primary);
  color: #ffffff;
}

/* Typography Defaults */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-primary);
  font-weight: 600;
  line-height: 1.25;
}

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

a:hover {
  color: var(--primary-hover);
  text-decoration: underline;
}

code, kbd, samp, pre {
  font-family: var(--font-mono);
  font-size: 12px;
}

/* Accessibility utility */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}