// src/css/base.css

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

:root {
  /* Colors */
  --bg:          #0d0d0f;
  --bg-2:        #111114;
  --surface:     #18181c;
  --surface-2:   #222228;
  --surface-3:   #2a2a32;
  --border:      #2e2e38;
  --border-soft: #232329;

  --accent:        #6c63ff;
  --accent-hover:  #7b74ff;
  --accent-dim:    rgba(108, 99, 255, 0.15);
  --accent-glow:   rgba(108, 99, 255, 0.08);

  --text:          #f0f0f4;
  --text-secondary: #9898a8;
  --text-muted:    #5a5a6e;
  --text-inverse:  #0d0d0f;

  --success:  #34d399;
  --warning:  #fbbf24;
  --error:    #f87171;
  --info:     #60a5fa;

  /* Typography */
  --font-sans: 'DM Sans', 'Inter', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;

  --text-xs:   0.72rem;
  --text-sm:   0.825rem;
  --text-base: 0.9375rem;
  --text-md:   1rem;
  --text-lg:   1.125rem;
  --text-xl:   1.25rem;

  --weight-normal:  400;
  --weight-medium:  500;
  --weight-semibold: 600;

  --leading-tight:  1.35;
  --leading-normal: 1.6;
  --leading-relaxed: 1.75;

  /* 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;
  --space-16: 4rem;

  /* Radius */
  --radius-sm:   6px;
  --radius-md:   10px;
  --radius-lg:   14px;
  --radius-xl:   20px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm:  0 1px 3px rgba(0,0,0,0.4);
  --shadow-md:  0 4px 16px rgba(0,0,0,0.5);
  --shadow-lg:  0 8px 32px rgba(0,0,0,0.6);
  --shadow-xl:  0 16px 48px rgba(0,0,0,0.7);

  /* Layout */
  --sidebar-width:    260px;
  --input-area-height: auto;
  --header-height:    56px;
  --max-message-width: 760px;

  /* Transitions */
  --ease:        cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in:     cubic-bezier(0.4, 0, 1, 1);
  --ease-out:    cubic-bezier(0, 0, 0.2, 1);
  --duration-fast: 120ms;
  --duration-base: 200ms;
  --duration-slow: 350ms;
}

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

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  font-weight: var(--weight-normal);
  line-height: var(--leading-normal);
  color: var(--text);
  background: var(--bg);
  min-height: 100dvh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* Scrollbars */
::-webkit-scrollbar {
  width: 5px;
  height: 5px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--surface-3);
}
* {
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}

/* Selection */
::selection {
  background: var(--accent-dim);
  color: var(--text);
}

/* Focus */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* Links */
a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease);
}
a:hover {
  color: var(--accent-hover);
}

/* Buttons reset */
button {
  font-family: inherit;
  font-size: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
  line-height: 1;
  -webkit-tap-highlight-color: transparent;
}
button:disabled {
  cursor: not-allowed;
  opacity: 0.45;
}

/* Inputs reset */
input, textarea, select {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
  background: none;
  border: none;
  outline: none;
}

/* Images */
img, svg {
  display: block;
  max-width: 100%;
}

/* Headings */
h1, h2, h3, h4, h5, h6 {
  font-weight: var(--weight-semibold);
  line-height: var(--leading-tight);
  color: var(--text);
}

/* 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;
}

.truncate {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}