@tailwind base;
@tailwind components;
@tailwind utilities;

/* ═══════════════════════════════════════════════
   Design System: CSS Custom Properties
   Refined dark palette with proper depth hierarchy
   ═══════════════════════════════════════════════ */

@layer base {
  :root {
    /* Surfaces — clear elevation hierarchy */
    --color-surface: #14181f;
    --color-surface-raised: #1a1f2b;
    --color-surface-overlay: #242a38;
    --color-surface-inset: #0f1218;

    /* Borders — subtle separation */
    --color-border: #2a3140;
    --color-border-muted: #1e2433;

    /* Foreground — text hierarchy */
    --color-foreground: #e8edf5;
    --color-foreground-secondary: #8d96a8;
    --color-foreground-muted: #505a6e;

    /* Accent — refined blue with depth */
    --color-accent: #5b9cf5;
    --color-accent-light: #162544;
    --color-accent-dark: #7db4ff;

    /* Layout background — deepest layer */
    --color-canvas: #0c1017;

    /* Glow/highlight colors */
    --color-glow-accent: rgba(91, 156, 245, 0.12);
    --color-glow-success: rgba(63, 185, 80, 0.12);

    /* Inter font from Google Fonts CDN */
    font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    font-feature-settings: "cv02", "cv03", "cv04", "cv11";
  }

  /* Smooth transitions on all interactive elements */
  button, a, input, [role="button"] {
    transition-property: color, background-color, border-color, box-shadow, opacity, transform;
    transition-duration: 150ms;
    transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
  }
}

/* ═══════════════════════════════════════════════
   Custom scrollbar — thin, minimal, with fade
   ═══════════════════════════════════════════════ */

::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--color-foreground-muted);
}

/* Firefox */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--color-border) transparent;
}

/* ═══════════════════════════════════════════════
   Glass / frosted overlays
   ═══════════════════════════════════════════════ */

.glass {
  background: rgba(26, 31, 43, 0.82);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
}

.glass-subtle {
  background: rgba(20, 24, 31, 0.65);
  backdrop-filter: blur(12px) saturate(160%);
  -webkit-backdrop-filter: blur(12px) saturate(160%);
}

/* ═══════════════════════════════════════════════
   Code blocks — refined syntax highlighting
   ═══════════════════════════════════════════════ */

.hljs {
  background: var(--color-surface-inset);
  padding: 1rem;
  border-radius: 0.5rem;
  border: 1px solid var(--color-border-muted);
  overflow-x: auto;
  font-size: 0.8125rem;
  line-height: 1.6;
  white-space: pre-wrap;
  word-break: break-word;
  box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.2);
}

/* Code block container with language label + copy button */
.code-block-wrapper {
  position: relative;
  margin: 0.75rem 0;
}

.code-block-wrapper .code-lang-label {
  position: absolute;
  top: 0;
  right: 0;
  padding: 0.25rem 0.625rem;
  font-size: 0.6875rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-foreground-muted);
  background: var(--color-surface-inset);
  border-bottom-left-radius: 0.375rem;
  border-top-right-radius: 0.5rem;
  border-left: 1px solid var(--color-border-muted);
  border-bottom: 1px solid var(--color-border-muted);
}

.code-block-wrapper .code-copy-btn {
  position: absolute;
  top: 0.375rem;
  right: 0.375rem;
  padding: 0.25rem 0.5rem;
  font-size: 0.6875rem;
  color: var(--color-foreground-muted);
  background: var(--color-surface-raised);
  border: 1px solid var(--color-border);
  border-radius: 0.25rem;
  cursor: pointer;
  opacity: 0;
  transition: opacity 150ms, background-color 150ms, color 150ms;
}

/* When a language label is present, shift copy button below it */
.code-block-wrapper .code-lang-label + .code-copy-btn,
.code-block-wrapper:has(.code-lang-label) .code-copy-btn {
  top: 2rem;
}

.code-block-wrapper:hover .code-copy-btn {
  opacity: 1;
}

.code-block-wrapper .code-copy-btn:hover {
  color: var(--color-foreground);
  background: var(--color-surface-overlay);
}

/* ═══════════════════════════════════════════════
   Diff view — colored line-level highlighting
   ═══════════════════════════════════════════════ */

.diff-view {
  font-size: 0.8125rem;
  line-height: 1.6;
}

.diff-add {
  background: rgba(63, 185, 80, 0.12);
  color: #3fb950;
  display: block;
  margin: 0 -1rem;
  padding: 0 1rem;
}

.diff-del {
  background: rgba(248, 81, 73, 0.12);
  color: #f85149;
  display: block;
  margin: 0 -1rem;
  padding: 0 1rem;
}

.diff-hunk {
  color: #79c0ff;
  display: block;
  margin: 0 -1rem;
  padding: 0.25rem 1rem;
  background: rgba(121, 192, 255, 0.06);
}

.diff-meta {
  color: var(--color-foreground-muted);
  font-weight: 600;
  display: block;
}

.diff-header {
  color: var(--color-foreground-secondary);
  font-weight: 600;
  display: block;
  margin: 0 -1rem;
  padding: 0.25rem 1rem;
  background: rgba(136, 144, 245, 0.06);
}

/* ═══════════════════════════════════════════════
   Search highlight — warm amber glow
   ═══════════════════════════════════════════════ */

mark.search-highlight {
  background: rgba(250, 204, 21, 0.2);
  color: inherit;
  padding: 1px 3px;
  border-radius: 3px;
  box-shadow: 0 0 0 1px rgba(250, 204, 21, 0.35),
              0 0 8px rgba(250, 204, 21, 0.08);
}

.search-match-focused {
  outline: 2px solid #f59e0b;
  outline-offset: 2px;
  box-shadow: 0 0 0 4px rgba(245, 158, 11, 0.15);
}

/* ═══════════════════════════════════════════════
   Search minimap — scrollbar tick track
   ═══════════════════════════════════════════════ */

.search-minimap {
  position: absolute;
  top: 0;
  right: 0;
  width: 8px;
  height: 100%;
  pointer-events: none;
  z-index: 10;
}

.search-minimap-tick {
  position: absolute;
  right: 0;
  width: 8px;
  height: 3px;
  background: rgba(254, 240, 138, 0.7);
  border: none;
  padding: 0;
  cursor: pointer;
  pointer-events: auto;
  border-radius: 1px;
  transition: background-color 150ms, height 150ms, box-shadow 150ms;
}

.search-minimap-tick:hover {
  background: #fde047;
  box-shadow: 0 0 4px rgba(253, 224, 71, 0.4);
}

.search-minimap-viewport {
  position: absolute;
  right: 0;
  width: 8px;
  background: rgba(148, 163, 184, 0.18);
  border-radius: 1px;
  pointer-events: none;
  transition: top 60ms linear, height 60ms linear;
  min-height: 4px;
}

.search-minimap-tick-active {
  background: #f59e0b;
  height: 6px;
  box-shadow: 0 0 6px rgba(245, 158, 11, 0.5);
}

/* ═══════════════════════════════════════════════
   Redaction selection indicator
   ═══════════════════════════════════════════════ */

.redaction-selected {
  outline: 2px solid #ef4444;
  outline-offset: 2px;
  background-image: repeating-linear-gradient(
    -45deg,
    transparent,
    transparent 4px,
    rgba(239, 68, 68, 0.06) 4px,
    rgba(239, 68, 68, 0.06) 8px
  );
}

/* ═══════════════════════════════════════════════
   Message dimming for search
   ═══════════════════════════════════════════════ */

.message-dimmed {
  opacity: 0.35;
  transition: opacity 200ms ease;
}

.message-dimmed:hover {
  opacity: 0.65;
}

/* ═══════════════════════════════════════════════
   Skeleton loading animation — refined shimmer
   ═══════════════════════════════════════════════ */

.skeleton {
  background: linear-gradient(
    90deg,
    var(--color-border-muted) 0%,
    var(--color-border) 40%,
    var(--color-border-muted) 80%
  );
  background-size: 300% 100%;
  animation: skeletonShimmer 1.8s ease-in-out infinite;
  border-radius: 0.375rem;
}

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

/* ═══════════════════════════════════════════════
   Prose overrides for message content
   ═══════════════════════════════════════════════ */

.prose-message h1 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-top: 1.25rem;
  margin-bottom: 0.5rem;
  letter-spacing: -0.02em;
  color: var(--color-foreground);
}

.prose-message h2 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-top: 1rem;
  margin-bottom: 0.375rem;
  letter-spacing: -0.01em;
  color: var(--color-foreground);
}

.prose-message h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-top: 0.875rem;
  margin-bottom: 0.375rem;
  color: var(--color-foreground);
}

.prose-message p {
  margin-top: 0.5rem;
  margin-bottom: 0.5rem;
  line-height: 1.6;
}

.prose-message p:first-child {
  margin-top: 0;
}

.prose-message p:last-child {
  margin-bottom: 0;
}

.prose-message ul,
.prose-message ol {
  margin-top: 0.5rem;
  margin-bottom: 0.5rem;
  padding-left: 1.25rem;
}

.prose-message li {
  margin-top: 0.25rem;
  margin-bottom: 0.25rem;
  line-height: 1.6;
}

.prose-message code:not(pre code) {
  font-family: "JetBrains Mono", "Fira Code", "SF Mono", ui-monospace, monospace;
  font-size: 0.8125em;
  padding: 0.125rem 0.375rem;
  border-radius: 0.25rem;
  background: var(--color-surface-inset);
  border: 1px solid var(--color-border-muted);
  color: #c4a1ff;
  font-weight: 500;
}

.prose-message pre {
  margin-top: 0.75rem;
  margin-bottom: 0.75rem;
  max-width: 100%;
  overflow-x: auto;
}

.prose-message blockquote {
  border-left: 3px solid var(--color-border);
  padding-left: 0.75rem;
  color: var(--color-foreground-secondary);
  margin-top: 0.5rem;
  margin-bottom: 0.5rem;
}

.prose-message a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 2px;
  text-decoration-color: rgba(91, 156, 245, 0.3);
  transition: text-decoration-color 150ms;
}

.prose-message a:hover {
  color: var(--color-accent-dark);
  text-decoration-color: rgba(125, 180, 255, 0.6);
}

.prose-message table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 0.75rem;
  margin-bottom: 0.75rem;
  font-size: 0.8125rem;
}

.prose-message th,
.prose-message td {
  border: 1px solid var(--color-border-muted);
  padding: 0.375rem 0.75rem;
  text-align: left;
}

.prose-message th {
  background: var(--color-surface-inset);
  font-weight: 600;
}

/* ═══════════════════════════════════════════════
   Progress markdown (compact variant)
   ═══════════════════════════════════════════════ */

.prose-message-progress {
  font-family: "JetBrains Mono", "Fira Code", "SF Mono", ui-monospace, monospace;
  font-size: 11px;
  line-height: 1.5;
  color: var(--color-foreground-secondary);
  word-break: break-word;
}

.prose-message-progress h1,
.prose-message-progress h2,
.prose-message-progress h3,
.prose-message-progress h4,
.prose-message-progress h5,
.prose-message-progress h6 {
  font-size: 12px;
  font-weight: 600;
  color: var(--color-foreground);
  margin-top: 0.25rem;
  margin-bottom: 0.25rem;
}

.prose-message-progress p {
  margin-top: 0.125rem;
  margin-bottom: 0.125rem;
}

.prose-message-progress p:first-child {
  margin-top: 0;
}

.prose-message-progress p:last-child {
  margin-bottom: 0;
}

.prose-message-progress ul,
.prose-message-progress ol {
  margin-top: 0.25rem;
  margin-bottom: 0.25rem;
  padding-left: 1rem;
}

.prose-message-progress li {
  margin-top: 0.125rem;
  margin-bottom: 0.125rem;
  line-height: 1.5;
}

.prose-message-progress code:not(pre code) {
  font-family: inherit;
  font-size: 0.9em;
  padding: 0.0625rem 0.25rem;
  border-radius: 0.1875rem;
  background: var(--color-surface-inset);
  border: 1px solid var(--color-border-muted);
  color: #c4a1ff;
  font-weight: 500;
}

.prose-message-progress pre {
  margin-top: 0.5rem;
  margin-bottom: 0.5rem;
  max-width: 100%;
  overflow-x: auto;
}

.prose-message-progress blockquote {
  border-left: 2px solid var(--color-border);
  padding-left: 0.5rem;
  color: var(--color-foreground-secondary);
  margin-top: 0.25rem;
  margin-bottom: 0.25rem;
}

.prose-message-progress a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 2px;
  text-decoration-color: rgba(91, 156, 245, 0.3);
  transition: text-decoration-color 150ms;
}

.prose-message-progress a:hover {
  color: var(--color-accent-dark);
  text-decoration-color: rgba(125, 180, 255, 0.6);
}

.prose-message-progress table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 0.375rem;
  margin-bottom: 0.375rem;
  font-size: 11px;
}

.prose-message-progress th,
.prose-message-progress td {
  border: 1px solid var(--color-border-muted);
  padding: 0.25rem 0.5rem;
  text-align: left;
}

.prose-message-progress th {
  background: var(--color-surface-inset);
  font-weight: 600;
}

/* ═══════════════════════════════════════════════
   Focus ring system
   ═══════════════════════════════════════════════ */

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* Custom checkbox styling */
.custom-checkbox {
  appearance: none;
  width: 1rem;
  height: 1rem;
  border: 1.5px solid var(--color-border);
  border-radius: 0.25rem;
  background: var(--color-surface);
  cursor: pointer;
  flex-shrink: 0;
  transition: all 150ms;
  position: relative;
}

.custom-checkbox:hover {
  border-color: var(--color-foreground-muted);
}

.custom-checkbox:checked {
  background: var(--color-accent);
  border-color: var(--color-accent);
  box-shadow: 0 0 0 2px rgba(91, 156, 245, 0.15);
}

.custom-checkbox:checked::after {
  content: "";
  position: absolute;
  top: 6.25%;
  left: 25%;
  width: 31.25%;
  height: 56.25%;
  border: solid #0c1017;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

.custom-checkbox.checkbox-danger:checked {
  background: #ef4444;
  border-color: #ef4444;
  box-shadow: 0 0 0 2px rgba(239, 68, 68, 0.15);
}

/* ═══════════════════════════════════════════════
   Button system
   ═══════════════════════════════════════════════ */

@layer components {
  .btn {
    @apply inline-flex items-center justify-center font-medium rounded-lg transition-all;
    @apply focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-offset-2;
    @apply active:scale-[0.97];
    --tw-ring-offset-color: var(--color-surface);
  }

  .btn-sm {
    @apply px-3 py-1.5 text-caption;
  }

  .btn-md {
    @apply px-4 py-2 text-body;
  }

  .btn-primary {
    background: linear-gradient(135deg, #5b9cf5, #4a8be0);
    @apply text-white;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2), inset 0 1px 0 rgba(255, 255, 255, 0.08);
    @apply hover:brightness-110;
    @apply disabled:opacity-50 disabled:cursor-not-allowed;
    @apply focus-visible:ring-accent;
  }

  .btn-secondary {
    @apply bg-surface-raised text-foreground-secondary border border-border;
    @apply hover:bg-surface-overlay hover:text-foreground;
    @apply disabled:opacity-50 disabled:cursor-not-allowed;
    @apply focus-visible:ring-accent;
  }

  .btn-secondary:hover {
    border-color: rgba(80, 90, 110, 0.3);
  }

  .btn-ghost {
    @apply text-foreground-secondary;
    @apply hover:bg-surface-overlay hover:text-foreground;
    @apply disabled:opacity-50 disabled:cursor-not-allowed;
    @apply focus-visible:ring-accent;
  }

  .btn-danger {
    background: linear-gradient(135deg, #dc2626, #c42020);
    @apply text-white;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2), inset 0 1px 0 rgba(255, 255, 255, 0.06);
    @apply hover:brightness-110;
    @apply disabled:opacity-50 disabled:cursor-not-allowed;
    @apply focus-visible:ring-red-500;
  }
}

/* ═══════════════════════════════════════════════
   Tooltip
   ═══════════════════════════════════════════════ */

.tooltip-popup {
  pointer-events: none;
  max-width: 280px;
  padding: 0.375rem 0.625rem;
  font-size: 0.75rem;
  line-height: 1.45;
  color: var(--color-foreground);
  background: var(--color-surface-overlay);
  border: 1px solid var(--color-border);
  border-radius: 0.375rem;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.35), 0 0 0 1px rgba(0, 0, 0, 0.1);
  animation: tooltip-in 120ms cubic-bezier(0.16, 1, 0.3, 1);
  white-space: normal;
}

.tooltip-popup[data-side="top"] {
  transform-origin: bottom center;
  translate: -50% -100%;
}

.tooltip-popup[data-side="bottom"] {
  transform-origin: top center;
  translate: -50% 0;
}

@keyframes tooltip-in {
  from {
    opacity: 0;
    scale: 0.96;
  }
  to {
    opacity: 1;
    scale: 1;
  }
}