@import 'tailwindcss';

@custom-variant dark (&:where(.dark, .dark *));

/* React Flow — imported here (not in component JS) so @tailwindcss/vite
   doesn't wrap it in a cascade layer, which would lower its specificity
   below Tailwind's own styles and hide nodes/edges. */
@import '@xyflow/react/dist/style.css';

@theme {
  /* ── Surface colors (Deep Charcoal — sidebar darkest) ─ */
  --color-bg-page: #16181f;
  --color-bg-sidebar: #0e1016;
  --color-bg-card: #1e2028;
  --color-bg-card-hover: #252830;
  --color-bg-input: #252830;
  --color-bg-code: #12141a;
  --color-bg-elevated: #2a2d38;
  --color-bg-raised: #303442;

  /* ── Text colors ───────────────────────────────── */
  --color-text-heading: #f0f2f5;
  --color-text-primary: #e2e5eb;
  --color-text-secondary: #848b9b;
  --color-text-muted: #4f5666;
  --color-text-rail-label: #e2e5eb;

  /* ── Border colors ─────────────────────────────── */
  --color-border-default: #2a2e3a;
  --color-border-hover: #3d4252;

  /* ── Accent (electric blue) ───────────────────────── */
  --color-accent: #60a5fa;
  --color-accent-hover: #3b82f6;
  --color-accent-dim: rgba(96,165,250,0.10);
  --color-accent-text: #93c5fd;

  /* ── Semantic colors ───────────────────────────── */
  --color-success: #34d399;
  --color-success-dim: rgba(52,211,153,0.10);
  --color-warning: #fbbf24;
  --color-warning-dim: rgba(251,191,36,0.10);
  --color-danger: #f87171;
  --color-danger-dim: rgba(248,113,113,0.10);
  --color-info: #67e8f9;
  --color-info-dim: rgba(103,232,249,0.10);

  /* ── Tailwind semantic mappings ─────────────────── */
  --color-background: #16181f;
  --color-foreground: #e2e5eb;
  --color-card: #1e2028;
  --color-card-foreground: #e2e5eb;
  --color-popover: #1e2028;
  --color-popover-foreground: #e2e5eb;
  --color-primary: #60a5fa;
  --color-primary-foreground: #ffffff;
  --color-secondary: #2a2d38;
  --color-secondary-foreground: #e2e5eb;
  --color-muted: #2a2d38;
  --color-muted-foreground: #848b9b;
  --color-accent-tw: #2a2d38;
  --color-accent-foreground: #e2e5eb;
  --color-destructive: #f87171;
  --color-destructive-foreground: #ffffff;
  --color-border: #2a2e3a;
  --color-input: #252830;
  --color-ring: #60a5fa;

  /* ── Radii ─────────────────────────────────────── */
  --radius-sm: 5px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;

  /* ── Fonts ─────────────────────────────────────── */
  --font-sans: 'IBM Plex Sans', system-ui, -apple-system, sans-serif;
  --font-heading: 'Bricolage Grotesque', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  /* font-label removed — migrated to font-mono or font-sans */

  /* ── Animations ────────────────────────────────── */
  --animate-fade-in: fade-in 200ms ease-out both;
  --animate-fade-in-up: fade-in-up 200ms ease-out both;
  --animate-slide-in-left: slide-in-from-left 200ms ease-out;
  --animate-slide-in-right: slide-in-from-right 200ms ease-out both;
  --animate-slide-in-bottom: slide-in-from-bottom 200ms ease-out both;
  --animate-scale-in: scale-in 150ms ease-out both;
  --animate-fade: fadeIn 300ms ease both;
  --animate-slide-up: slide-up 320ms cubic-bezier(.22,.9,.28,1) both;
  --animate-pulse-amber: pulse-amber 1.6s infinite;

  @keyframes slide-up {
    from { transform: translateY(14px); opacity: 0; }
    to   { transform: translateY(0);    opacity: 1; }
  }
  @keyframes pulse-amber {
    0%   { box-shadow: 0 0 0 0    rgba(251,191,36,0.45); }
    70%  { box-shadow: 0 0 0 10px rgba(251,191,36,0); }
    100% { box-shadow: 0 0 0 0    rgba(251,191,36,0); }
  }
  @keyframes fade-in {
    from { opacity: 0; } to { opacity: 1; }
  }
  @keyframes fade-in-up {
    from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: translateY(0); }
  }
  @keyframes slide-in-from-left {
    from { transform: translateX(-100%); } to { transform: translateX(0); }
  }
  @keyframes slide-in-from-right {
    from { opacity: 0; transform: translateX(16px); } to { opacity: 1; transform: translateX(0); }
  }
  @keyframes slide-in-from-bottom {
    from { opacity: 0; transform: translateY(16px); } to { opacity: 1; transform: translateY(0); }
  }
  @keyframes scale-in {
    from { opacity: 0; transform: scale(0.95); } to { opacity: 1; transform: scale(1); }
  }
  @keyframes fadeIn {
    from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: translateY(0); }
  }
}

:root {
  --sidebar-w: 72px;
  --sidebar-w-pinned: 260px;
  --topbar-h: 44px;
  --ease-out-smooth: cubic-bezier(0.4, 0, 0.2, 1);
}

/* ── Base styles ─────────────────────────────────────── */
@layer base {
  * {
    @apply border-border;
    scrollbar-width: thin;
    scrollbar-color: var(--color-border) transparent;
  }
  *::-webkit-scrollbar {
    width: 6px;
    height: 6px;
  }
  *::-webkit-scrollbar-track {
    background: transparent;
  }
  *::-webkit-scrollbar-thumb {
    background-color: var(--color-border);
    border-radius: 9999px;
  }
  *::-webkit-scrollbar-thumb:hover {
    background-color: var(--color-muted-foreground);
  }

  body {
    @apply bg-background text-foreground font-sans;
  }

  button, [role="button"] {
    cursor: pointer;
  }

  h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    letter-spacing: -0.02em;
  }
}

/* ── Glass/gradient shims removed — Design System v4 migration complete ── */

@utility stagger-item {
  opacity: 0;
  animation: fade-in-only 350ms var(--ease-out-smooth) both;
  animation-delay: calc(var(--stagger-index, 0) * 50ms);
}

@utility btn-press {
  @apply active:scale-[0.98] transition-transform;
}

/* ── New component classes (Design System v4) ───── */
@utility card-flat {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-default);
  border-radius: 8px;
}

@utility card-interactive {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-default);
  border-radius: 8px;
  cursor: pointer;
  transition: transform 350ms cubic-bezier(0.34, 1.56, 0.64, 1),
              border-color 200ms ease,
              box-shadow 200ms ease;
  &:hover {
    transform: translateY(-4px);
    border-color: var(--color-border-hover);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
  }
}

@utility btn-primary-v4 {
  background: var(--color-accent);
  color: #ffffff;
  font-weight: 550;
  border-radius: 5px;
  padding: 9px 16px;
  font-size: 13px;
  transition: filter 150ms ease, box-shadow 150ms ease, transform 150ms ease;
  &:hover {
    filter: brightness(1.1);
    box-shadow: 0 2px 10px rgba(96, 165, 250, 0.2);
    transform: translateY(-1px);
  }
  &:active {
    box-shadow: 0 0 4px rgba(96, 165, 250, 0.1);
    transform: translateY(0);
  }
}

@utility btn-ghost-v4 {
  background: transparent;
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border-default);
  border-radius: 5px;
  padding: 9px 16px;
  font-size: 13px;
  transition: background 150ms ease, color 150ms ease, border-color 150ms ease, box-shadow 150ms ease, transform 150ms ease;
  &:hover {
    background: var(--color-bg-elevated);
    color: var(--color-text-primary);
    border-color: var(--color-border-hover);
    transform: translateY(-1px);
  }
  &:active {
    transform: translateY(0);
  }
}

/* ── Interactive shadow patterns (dark-mode aware) ── */
/* On dark backgrounds, use brighter surfaces + faint accent glow
   instead of black shadows (which are invisible on #1a1c23) */

/* Tab/toggle group: active item gets elevated surface + faint accent glow */
@utility tab-active-shadow {
  background: var(--color-bg-elevated);
  box-shadow: 0 1px 4px rgba(96, 165, 250, 0.08);
}

/* Card hover lift — brighter border + subtle accent glow */
@utility card-lift {
  transition: box-shadow 200ms ease, transform 200ms ease, border-color 200ms ease;
  &:hover {
    border-color: var(--color-border-hover);
    box-shadow: 0 2px 8px rgba(96, 165, 250, 0.06);
    transform: translateY(-2px);
  }
  &:active {
    box-shadow: none;
    transform: translateY(0);
  }
}

@utility rdp-custom {
  @apply text-foreground;
  & .rdp-month { @apply w-full; }
  & .rdp-caption { @apply flex justify-center items-center mb-4; }
  & .rdp-caption_label { @apply text-sm font-medium; }
  & .rdp-nav { @apply flex gap-1; }
  & .rdp-nav_button { @apply h-7 w-7 bg-transparent p-0 opacity-50 hover:opacity-100; }
  & .rdp-table { @apply w-full border-collapse; }
  & .rdp-head_cell { @apply text-muted-foreground font-normal text-xs; }
  & .rdp-cell { @apply text-center text-sm p-0; }
  & .rdp-day { @apply h-9 w-9 p-0 font-normal hover:bg-accent rounded-md transition-colors; }
  & .rdp-day_selected { @apply bg-primary text-primary-foreground hover:bg-primary/90; }
  & .rdp-day_today { @apply bg-accent text-accent-foreground; }
  & .rdp-day_outside { @apply text-muted-foreground opacity-50; }
  & .rdp-day_disabled { @apply text-muted-foreground opacity-50; }
  & .rdp-day_range_middle { @apply bg-accent text-accent-foreground; }
  & .rdp-day_hidden { @apply invisible; }
}

/* ── Layout utilities ────────────────────────────────── */
@layer utilities {
  .app-shell {
    display: grid;
    grid-template-columns: var(--sidebar-w) 1fr;
    grid-template-rows: auto 1fr;
    height: 100vh;
    overflow: hidden;
    transition: grid-template-columns 200ms ease;
  }

  .app-shell--pinned {
    --sidebar-w: 260px;
  }

  /* Legacy collapsed class — kept as alias for pinned inverse */
  .app-shell--collapsed {
    grid-template-columns: 56px 1fr;
  }

  .topbar {
    grid-column: 1 / -1;
    height: var(--topbar-h);
  }

  .sidebar {
    min-height: 0;
    height: 100%;
    overflow-y: auto;
  }

  .main-content {
    min-height: 0;
    min-width: 0;
    /* Each page handles its own scrolling — full-height pages use
       overflow-hidden, scrollable pages use overflow-y-auto */
  }

  @media (max-width: 767px) {
    .app-shell {
      grid-template-columns: 1fr;
    }
  }

  /* Staggered fade-in helper — uses opacity-only animation
     so it doesn't block hover transforms via fill-mode */
  .fade-in {
    animation: fade-in-only 0.3s ease both;
  }

  @keyframes fade-in-only {
    from { opacity: 0; }
    to { opacity: 1; }
  }
}

/* ── Sonner toast overrides ──────────────────────────── */
[data-sonner-toast] {
  background-color: var(--color-card) !important;
  color: var(--color-card-foreground) !important;
  border: 1px solid var(--color-border) !important;
  box-shadow: 0 10px 15px -3px rgb(0 0 0 / 0.3) !important;
  border-radius: 0.75rem;
  font-family: var(--font-sans);
}

[data-sonner-toast] [data-title] {
  font-family: var(--font-sans);
  font-weight: 600;
}

[data-sonner-toast][data-type='success'] {
  border-color: oklch(0.76 0.15 163 / 0.3) !important;
}
[data-sonner-toast][data-type='success'] [data-icon] {
  color: oklch(0.76 0.15 163);
}

[data-sonner-toast][data-type='error'] {
  border-color: oklch(0.7 0.16 22 / 0.3) !important;
}
[data-sonner-toast][data-type='error'] [data-icon] {
  color: oklch(0.7 0.16 22);
}

[data-sonner-toast][data-type='info'] {
  border-color: var(--color-border) !important;
}
[data-sonner-toast][data-type='info'] [data-icon] {
  color: var(--color-muted-foreground);
}

[data-sonner-toast][data-type='warning'] {
  border-color: oklch(0.82 0.16 85 / 0.3) !important;
}
[data-sonner-toast][data-type='warning'] [data-icon] {
  color: oklch(0.82 0.16 85);
}

[data-sonner-toast] [data-close-button] {
  color: var(--color-muted-foreground);
  border-radius: 0.375rem;
  transition: color 150ms, background-color 150ms;
}
[data-sonner-toast] [data-close-button]:hover {
  background-color: var(--color-accent);
  color: var(--color-accent-foreground);
}

/* ── React Flow dark theme overrides ─────────────────── */
/* React Flow v12 uses --xy-* CSS custom properties for theming.
   Override the defaults to match our design system. */
.react-flow.dark {
  --xy-background-color-default: transparent;
  --xy-edge-stroke-default: var(--color-border);
  --xy-edge-stroke-selected-default: var(--color-primary);
  --xy-edge-label-color-default: var(--color-muted-foreground);
  --xy-edge-label-background-color-default: var(--color-card);
  --xy-node-background-color-default: var(--color-card);
  --xy-node-color-default: var(--color-foreground);
  --xy-node-border-default: 1px solid var(--color-border);
  --xy-handle-background-color-default: var(--color-border);
  --xy-handle-border-color-default: var(--color-card);
  --xy-minimap-background-color-default: var(--color-card);
  --xy-minimap-mask-background-color-default: rgba(28, 31, 42, 0.6);
  --xy-controls-button-background-color-default: var(--color-card);
  --xy-controls-button-background-color-hover-default: var(--color-accent);
  --xy-controls-button-color-default: var(--color-muted-foreground);
  --xy-controls-button-color-hover-default: var(--color-foreground);
  --xy-controls-button-border-color-default: var(--color-border);
}

.react-flow__controls {
  border-radius: 0.75rem !important;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3) !important;
  overflow: hidden;
}

.react-flow__minimap {
  border-radius: 0.75rem !important;
}

.react-flow__attribution {
  display: none;
}

/* ── Glow edge animations ────────────────────────────── */
@keyframes glow-flow-downstream {
  from { stroke-dashoffset: 40; }
  to { stroke-dashoffset: 0; }
}

@keyframes glow-flow-upstream {
  from { stroke-dashoffset: 0; }
  to { stroke-dashoffset: 40; }
}

.glow-edge-flow-downstream {
  animation: glow-flow-downstream 1s linear infinite;
}

.glow-edge-flow-upstream {
  animation: glow-flow-upstream 1s linear infinite;
}

/* ── Accessibility: Reduce motion ────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ── Print / PDF export ───────────────────────────────────────────────── */
@media print {
  /* Hide everything that isn't the canvas */
  body > * { display: none !important; }

  /* Show only the React Flow viewport inside the diagram editor page */
  #root { display: block !important; }
  #root > * { display: none !important; }

  /* The diagram editor mounts as a child of the app shell — target the canvas wrapper */
  .react-flow__renderer,
  .react-flow__viewport,
  .react-flow {
    display: block !important;
  }

  /* Make the canvas fill the printed page */
  .react-flow {
    position: fixed !important;
    inset: 0 !important;
    width: 100vw !important;
    height: 100vh !important;
    background: #ffffff !important;
  }

  /* Force light backgrounds on nodes so they're readable on white paper */
  .react-flow__node {
    print-color-adjust: exact;
    -webkit-print-color-adjust: exact;
  }

  /* Hide UI chrome */
  .react-flow__controls,
  .react-flow__minimap,
  .react-flow__panel {
    display: none !important;
  }
}