@import url('https://fonts.googleapis.com/css2?family=Inter:ital,opsz,wght@0,14..32,100..900;1,14..32,100..900&display=swap');

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

* {
  margin: 0;
  padding: 0;
}

html {
  -webkit-text-size-adjust: 100%;
  tab-size: 4;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

img, video, svg {
  display: block;
  max-width: 100%;
}

input, button, textarea, select {
  font: inherit;
}

p, h1, h2, h3, h4, h5, h6 {
  overflow-wrap: break-word;
}

[hidden] { display: none !important; }

/* =========================
   Global Modern iOS-like Scrollbar
   ========================= */

/* Firefox */
* {
  scrollbar-width: thin;
  scrollbar-color: rgba(120, 120, 128, 0.45) transparent;
}

/* Webkit browsers */
*::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

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

*::-webkit-scrollbar-thumb {
  background: rgba(120, 120, 128, 0.45);
  border-radius: 999px;
  border: 2px solid transparent;
  background-clip: content-box;

  transition:
    background 0.2s ease,
    opacity 0.2s ease;
}

*::-webkit-scrollbar-thumb:hover {
  background: rgba(120, 120, 128, 0.65);
  border: 2px solid transparent;
  background-clip: content-box;
}

*::-webkit-scrollbar-thumb:active {
  background: rgba(120, 120, 128, 0.8);
}

*::-webkit-scrollbar-corner {
  background: transparent;
}

/* Optional — smoother feel */
html {
  scroll-behavior: smooth;
}


/* ============================================================
   PRIMITIVE TOKENS
   Internal palette — not for direct use in components.
   ============================================================ */
:root {
  /* Brand primitives */
  --color-primary-50:  #EFEFFF;
  --color-primary-100: #CDCDFF;
  --color-primary-200: #B4B4FF;
  --color-primary-300: #9292FE;
  --color-primary-400: #7D7DFE;
  --color-primary-500: #5D5DFE;
  --color-primary-600: #5555E7;
  --color-primary-700: #4242B4;
  --color-primary-800: #33338C;
  --color-primary-900: #27276B;

  /* Neutral primitives */
  --color-neutral-0:   #FFFFFF;
  --color-neutral-5:   #FAFBFC;
  --color-neutral-10:  #F7F8FA;
  --color-neutral-50:  #F2F4F7;
  --color-neutral-100: #E8EBF0;
  --color-neutral-200: #DDE2E8;
  --color-neutral-300: #D1D7DF;
  --color-neutral-400: #B5BEC9;
  --color-neutral-500: #909BA9;
  --color-neutral-600: #6A7687;
  --color-neutral-700: #4C5665;
  --color-neutral-800: #313946;
  --color-neutral-900: #202631;
  --color-neutral-950: #151A22;
  --color-neutral-1000: #0C1016;
}

/* ============================================================
   SEMANTIC TOKENS
   ============================================================ */
:root {
  /* Backgrounds */
  --color-bg:                var(--color-neutral-5);
  --color-bg-subtle:         var(--color-neutral-50);
  --color-bg-muted:          var(--color-neutral-100);
  --color-wash-quiet:        var(--color-neutral-5);
  --color-surface:           var(--color-neutral-0);
  --color-surface-secondary: var(--color-neutral-100);
  --color-surface-elevated:  var(--color-neutral-0); /* reserved — currently unused */

  /* Shell chrome */
  --color-sidebar-inverse: #0f1140;

  /* Text */
  --color-text:             var(--color-neutral-900);
  --color-text-secondary:   var(--color-neutral-700);
  --color-text-muted:       var(--color-neutral-600);
  --color-text-subtle:      var(--color-neutral-400);
  --color-text-inverse:     var(--color-neutral-0);
  --color-text-placeholder: var(--color-neutral-400);
  --color-link:             var(--color-brand);

  /* Borders */
  --color-border:        var(--color-neutral-100);
  --color-border-muted:  var(--color-neutral-300);
  --color-border-strong: var(--color-neutral-400);

  /* Brand */
  --color-brand:       var(--color-primary-600);
  --color-brand-hover: var(--color-primary-500);
  --color-brand-soft:  var(--color-primary-50);

  /* States */
  --color-success:      #16a34a;
  --color-warning:      #d97706;
  --color-danger:       #dc2626;
  --color-danger-hover: #b91c1c;
  --color-info:         #0891b2;
  --color-success-soft: #eef7f0;
  --color-warning-soft: #faf4e8;
  --color-danger-soft:  #faeded;
  --color-info-soft:    #edf6f8;

  /* Disabled */
  --color-disabled:      var(--color-neutral-50);
  --color-disabled-text: var(--color-neutral-400);

  /* Interaction */
  --color-focus-ring:    rgb(85 85 231 / 0.2);
  --color-overlay:       rgb(35 35 41 / 0.55);
  --color-control-thumb: var(--color-neutral-0);
  --color-track-on-fill: rgb(255 255 255 / 0.22);

  /* Typography — font families */
  --font-family-base: "Inter", sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-family-mono: "JetBrains Mono", "Fira Code", monospace;

  /* Typography — font sizes */
  --font-size-xs:  0.75rem;
  --font-size-sm:  0.875rem;
  --font-size-md:  1rem;
  --font-size-lg:  1.125rem;
  --font-size-xl:  1.25rem;
  --font-size-2xl: 1.5rem;

  /* Typography — font weights */
  --font-weight-regular:  400;
  --font-weight-medium:   500;
  --font-weight-semibold: 600;
  --font-weight-bold:     700;

  /* Typography — line heights */
  --line-height-tight:  1.2;
  --line-height-normal: 1.5;

  /* 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-7:  1.75rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;

  /* Radius */
  --radius-none: 0;
  --radius-sm:   0.25rem;
  --radius-md:   0.5rem;
  --radius-lg:   0.75rem;
  --radius-xl:   1rem;
  --radius-full: 9999px;

  /* Control sizes */
  --control-height-sm: 2rem;
  --control-height-md: 2.5rem;
  --control-height-lg: 3rem;

  /* Icon sizes */
  --icon-sm: 14px;
  --icon-md: 16px;
  --icon-lg: 20px;

  /* Layout */
  --content-width-lg: 72rem;
  --content-width-md: 56rem;
  --sidebar-width:    15rem;

  /* Shadows */
  --shadow-subtle: 0 0 0 1px rgba(0,0,0,0.02), 0 1px 3px rgba(0,0,0,0.08);
  --shadow-sm: 0 1px 2px rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 8px rgb(0 0 0 / 0.08);

  /* Motion */
  --duration-fast:     120ms;
  --duration-normal:   150ms;
  --ease-standard:     cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast:   var(--duration-fast) var(--ease-standard);
  --transition-normal: var(--duration-normal) var(--ease-standard);

  /* Z-index */
  --z-dropdown: 1000;
  --z-drawer:   1100;
  --z-modal:    1200;
  --z-tooltip:  1300;
  --z-toast:    1400;
}

/* ============================================================
   DARK MODE OVERRIDES
   ============================================================ */
[data-theme="dark"] {
  /* Backgrounds */
  --color-bg:                var(--color-neutral-900);
  --color-bg-subtle:         var(--color-neutral-800);
  --color-bg-muted:          var(--color-neutral-900);
  --color-wash-quiet:        var(--color-neutral-900);
  --color-surface:           var(--color-neutral-950);
  --color-surface-secondary: var(--color-neutral-800);
  --color-surface-elevated:  var(--color-neutral-900);

  /* Shell chrome */
  --color-sidebar-inverse: #0f1140;

  /* Text */
  --color-text:             var(--color-neutral-100);
  --color-text-secondary:   var(--color-neutral-300);
  --color-text-muted:       var(--color-neutral-400);
  --color-text-subtle:      var(--color-neutral-400);
  --color-text-inverse:     var(--color-neutral-900);
  --color-text-placeholder: var(--color-neutral-400);

  /* Borders */
  --color-border:        var(--color-neutral-800);
  --color-border-muted:  var(--color-neutral-700);
  --color-border-strong: var(--color-neutral-600);

  /* Brand */
  --color-brand:       var(--color-primary-400);
  --color-brand-hover: var(--color-primary-300);
  --color-brand-soft:  rgb(125 125 254 / 0.15);

  /* States */
  --color-success:      #4ade80;
  --color-warning:      #fbbf24;
  --color-danger:       #f87171;
  --color-danger-hover: #ef4444;
  --color-info:         #22d3ee;
  --color-success-soft: rgb(74 222 128 / 0.12);
  --color-warning-soft: rgb(251 191 36 / 0.12);
  --color-danger-soft:  rgb(248 113 113 / 0.12);
  --color-info-soft:    rgb(34 211 238 / 0.12);

  /* Disabled */
  --color-disabled:      var(--color-neutral-800);
  --color-disabled-text: var(--color-neutral-600);

  /* Interaction */
  --color-focus-ring:    rgb(125 125 254 / 0.2);
  --color-overlay:       rgb(0 0 0 / 0.7);
  --color-control-thumb: var(--color-neutral-0);
  --color-track-on-fill: rgb(255 255 255 / 0.22);

  /* Shadows */
  --shadow-subtle: 0 0 0 1px rgba(255,255,255,0.06), 0 1px 3px rgba(0,0,0,0.3);
  --shadow-sm: 0 1px 2px rgb(0 0 0 / 0.3);
  --shadow-md: 0 4px 10px rgb(0 0 0 / 0.35);
}

/* Document link baseline — unclassed anchors only */
a:where(:not([class])) {
  color: var(--color-link);
  text-decoration: underline;
  text-underline-offset: 0.15em;
  transition: color var(--transition-fast);
}

a:where(:not([class])):hover {
  color: var(--color-brand-hover);
}

a:where(:not([class])):focus-visible {
  outline: none;
  box-shadow: 0 0 0 2px var(--color-focus-ring);
  border-radius: var(--radius-sm);
}

/* =========================================
   LAYOUT PRIMITIVES
   ========================================= */


/* =========================================
   CONTAINER
   Page width wrapper
   ========================================= */

.l-container {
  --container-width:   var(--content-width-lg);
  --container-padding: var(--space-4);

  width: 100%;
  max-width: var(--container-width);
  margin-inline: auto;
  padding-inline: var(--container-padding);
}

.l-container--sm  { --container-width: 40rem; }
.l-container--md  { --container-width: var(--content-width-md); }
.l-container--lg  { --container-width: var(--content-width-lg); }
.l-container--full { --container-width: 100%; }

@media (max-width: 768px) {
  .l-container { --container-padding: var(--space-3); }
}


/* =========================================
   STACK
   Implements the "Stack" composition unit.
   Vertical layout flow with tokenized rhythm.
   ========================================= */

.l-stack {
  --stack-gap: var(--space-4);

  display: flex;
  flex-direction: column;
  gap: var(--stack-gap);
}

.l-stack--xs { --stack-gap: var(--space-1); }
.l-stack--sm { --stack-gap: var(--space-2); }
.l-stack--lg { --stack-gap: var(--space-5); }
.l-stack--xl { --stack-gap: var(--space-8); }

@media (max-width: 768px) {
  .l-stack--xl { --stack-gap: var(--space-5); }
}


/* =========================================
   INLINE
   Implements the "Toolbar row" composition unit
   (combined with l-spacer).
   Horizontal flow with alignment modifiers.
   ========================================= */

.l-inline {
  --inline-gap: var(--space-3);

  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--inline-gap);
}

.l-inline--xs { --inline-gap: var(--space-1); }
.l-inline--sm { --inline-gap: var(--space-2); }
.l-inline--lg { --inline-gap: var(--space-5); }

.l-inline--between { justify-content: space-between; }
.l-inline--start   { justify-content: flex-start; }
.l-inline--center  { justify-content: center; }
.l-inline--end     { justify-content: flex-end; }
.l-inline--stretch { align-items: stretch; }
.l-inline--nowrap  { flex-wrap: nowrap; }

@media (max-width: 768px) {
  .l-inline--responsive {
    flex-direction: column;
    align-items: stretch;
  }
}


/* =========================================
   SPACER
   Flex push spacer — use inside l-inline.
   Canonical toolbar pattern:
   [search] [l-spacer] [action] [action]
   ========================================= */

.l-spacer { flex: 1; }


/* =========================================
   CLUSTER
   Implements the "Cluster" composition unit.
   Wrapping chip / tag / button groups.
   ========================================= */

.l-cluster {
  --cluster-gap: var(--space-2);

  display: flex;
  flex-wrap: wrap;
  gap: var(--cluster-gap);
}

.l-cluster--sm { --cluster-gap: var(--space-1); }
.l-cluster--lg { --cluster-gap: var(--space-4); }


/* =========================================
   CENTER
   Centering primitive.
   Use for empty states, login screens.
   ========================================= */

.l-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

.l-center--column { flex-direction: column; }


/* =========================================
   SPLIT
   Implements the "Split" composition unit.
   Fixed-width first region + fluid second region.
   Named l-split (not l-sidebar) to match
   design.md terminology and avoid collision
   with l-page-sidebar.

   ⚠ Expects exactly 2 children.
   For 3+ columns use l-grid instead.
   ========================================= */

.l-split {
  --split-size: var(--sidebar-width);
  --split-gap:  var(--space-6);

  display: flex;
  align-items: flex-start;
  gap: var(--split-gap);
}

.l-split > :first-child { flex-basis: var(--split-size); flex-shrink: 0; }
.l-split > :last-child  { flex: 1; min-width: 0; }

/* Proportional percentage variant — override via style="--split-ratio: 40%" */
.l-split--ratio > :first-child {
  flex-basis: var(--split-ratio, 33.333%);
  flex-shrink: 0;
  flex-grow:   0;
}

@media (max-width: 768px) {
  .l-split { flex-direction: column; }
  .l-split > :first-child { flex-basis: auto; width: 100%; }
}


/* =========================================
   SWITCHER
   Auto responsive row → column.
   Intrinsically responsive — no media query.
   ========================================= */

.l-switcher {
  --switcher-gap:       var(--space-4);
  --switcher-threshold: 30rem;

  display: flex;
  flex-wrap: wrap;
  gap: var(--switcher-gap);
}

.l-switcher > * {
  flex-grow: 1;
  flex-basis: calc((var(--switcher-threshold) - 100%) * 999);
}


/* =========================================
   BREAKPOINT REFERENCE
   Canonical breakpoint values.
   Not tokens (CSS custom properties cannot
   be used inside @media queries).
   Update all @media usages below together.

   --bp-lg : 64rem  (1024px) tablet → desktop
   --bp-md : 48rem  ( 768px) mobile → tablet
   ========================================= */


/* =========================================
   GRID
   Spatial layouts — named columns and
   auto-fit responsive variants.
   ========================================= */

.l-grid {
  --grid-gap: var(--space-5);

  display: grid;
  gap: var(--grid-gap);
}

.l-grid--sm { --grid-gap: var(--space-3); }
.l-grid--lg { --grid-gap: var(--space-8); }

/* Fixed columns */
.l-grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.l-grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.l-grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

/* Auto responsive */
.l-grid--auto-sm { grid-template-columns: repeat(auto-fit, minmax(12rem, 1fr)); }
.l-grid--auto-md { grid-template-columns: repeat(auto-fit, minmax(18rem, 1fr)); }
.l-grid--auto-lg { grid-template-columns: repeat(auto-fit, minmax(24rem, 1fr)); }

/* Tablet intermediate step: 3→2, 4→2 */
@media (max-width: 64rem) {
  .l-grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .l-grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

/* Mobile: all fixed grids collapse to 1 column */
@media (max-width: 48rem) {
  .l-grid--2,
  .l-grid--3,
  .l-grid--4 { grid-template-columns: 1fr; }
}


/* =========================================
   SPAN UTILITIES
   Dashboard spanning helpers.
   Use inside l-grid or any CSS grid container
   to span cells across columns or rows.
   ========================================= */

.l-col-full   { grid-column: 1 / -1; }
.l-col-span-2 { grid-column: span 2; }
.l-col-span-3 { grid-column: span 3; }
.l-row-span-2 { grid-row: span 2; }


/* =========================================
   REEL
   Horizontal scroll layout.
   ========================================= */

.l-reel {
  --reel-gap: var(--space-4);

  display: flex;
  overflow-x: auto;
  gap: var(--reel-gap);
  padding-bottom: var(--space-2);
  overscroll-behavior-x: contain;
}

.l-reel > * { flex: 0 0 auto; }


/* =========================================
   FRAME
   Aspect-ratio wrapper.
   ========================================= */

.l-frame {
  overflow: hidden;
  aspect-ratio: 16 / 9;
}

.l-frame--square   { aspect-ratio: 1 / 1; }
.l-frame--video    { aspect-ratio: 16 / 9; }
.l-frame--portrait { aspect-ratio: 3 / 4; }

.l-frame > img,
.l-frame > video,
.l-frame > iframe {
  width: 100%;
  height: 100%;
  object-fit: cover;
}


/* =========================================
   PAGE
   App shell layout.
   Implements the Default page rhythm from
   design.md § Composition philosophy:

   Application shell
   ├── Sidebar navigation (persistent, left)
   └── Main content area (right)
       ├── Application header (top of main)
       └── Content region (scrolls)

   Top-level shell only — never nest l-page.
   ========================================= */

.l-page {
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr;
  min-height: 100vh;
}

.l-page-sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  flex-shrink: 0;
}

.l-page-main {
  display: flex;
  flex-direction: column;
  min-width: 0;
  isolation: isolate;
}

.l-page-header {
  position: sticky;
  top: 0;
  z-index: var(--z-dropdown);
  flex-shrink: 0;
}

.l-page-content {
  flex: 1;
  min-width: 0;
  overflow-y: auto;
  overflow-x: hidden;
}

.l-page--no-sidebar {
  grid-template-columns: 1fr;
}

.l-page--sidebar-collapsed {
  grid-template-columns: var(--sidebar-width-collapsed, 3.5rem) 1fr;
}