/* KaryaSuite V3 — Design tokens */
:root {
  /* Brand */
  --ks-primary: #0B4C8C;
  --ks-primary-dark: #073968;
  --ks-primary-tint: #E8F0F9;
  --ks-primary-tint-2: #F4F8FC;

  /* Module accents (M365-style module identity) */
  --mod-word: #1E5AA8;
  --mod-word-tint: #E8F0F9;
  --mod-sheets: #107C41;
  --mod-sheets-tint: #E7F3EC;
  --mod-slides: #B7472A;
  --mod-slides-tint: #FBECE7;
  --mod-pdf: #A4262C;
  --mod-pdf-tint: #FAE8E9;
  --mod-notes: #6B4EA0;
  --mod-notes-tint: #EFEBF6;
  --mod-board: #0F766E;
  --mod-board-tint: #E5F3F1;
  --mod-db: #475569;
  --mod-db-tint: #EEF1F4;
  --mod-admin: #1F2937;
  --mod-admin-tint: #EEF0F3;
  --mod-ai: #7C3AED;
  --mod-ai-tint: #F1EBFB;

  /* Neutrals — warm-cool balance */
  --ink-900: #0F1620;
  --ink-800: #1B2431;
  --ink-700: #2E3A4B;
  --ink-600: #475569;
  --ink-500: #64748B;
  --ink-400: #94A3B8;
  --ink-300: #CBD5E1;
  --ink-200: #E2E8F0;
  --ink-150: #EBEFF4;
  --ink-100: #F1F5F9;
  --ink-50:  #F7F9FB;
  --canvas: #FBFCFD;
  --white: #FFFFFF;

  /* Semantic */
  --ok: #0F7A3E;
  --ok-tint: #E4F3EB;
  --warn: #B45309;
  --warn-tint: #FBF1E1;
  --err: #B91C1C;
  --err-tint: #FBEAEA;

  /* Radii */
  --r-xs: 3px;
  --r-sm: 5px;
  --r-md: 7px;
  --r-lg: 10px;
  --r-xl: 14px;

  /* Shadows */
  --sh-1: 0 1px 2px rgba(15, 22, 32, 0.05), 0 1px 1px rgba(15, 22, 32, 0.04);
  --sh-2: 0 2px 6px rgba(15, 22, 32, 0.06), 0 1px 2px rgba(15, 22, 32, 0.05);
  --sh-3: 0 8px 24px rgba(15, 22, 32, 0.10), 0 2px 6px rgba(15, 22, 32, 0.06);
  --sh-4: 0 20px 48px rgba(15, 22, 32, 0.16), 0 4px 12px rgba(15, 22, 32, 0.08);

  /* Type */
  --f-sans: "Inter", -apple-system, "Segoe UI", system-ui, sans-serif;
  --f-serif: "Source Serif 4", "Source Serif Pro", Georgia, serif;
  --f-mono: "JetBrains Mono", "SF Mono", ui-monospace, Menlo, monospace;
  --f-deva: "Noto Sans Devanagari", "Inter", sans-serif;

  /* Layout */
  --rail-w: 68px;
  --topbar-h: 52px;
  --ai-w: 380px;
}

* { box-sizing: border-box; }

html, body, #root {
  height: 100%;
  margin: 0;
  padding: 0;
}
body {
  font-family: var(--f-sans);
  font-size: 14px;
  line-height: 1.45;
  color: var(--ink-800);
  background: var(--canvas);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}
button { font-family: inherit; cursor: pointer; }
input, textarea, select { font-family: inherit; font-size: inherit; color: inherit; }

/* Scrollbars — subtle */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: var(--ink-200);
  border-radius: 8px;
  border: 2px solid transparent;
  background-clip: padding-box;
}
::-webkit-scrollbar-thumb:hover { background: var(--ink-300); background-clip: padding-box; border: 2px solid transparent; }

/* Shell */
.ks-shell {
  display: grid;
  grid-template-columns: var(--rail-w) 1fr;
  grid-template-rows: var(--topbar-h) 1fr;
  height: 100vh;
  overflow: hidden;
}
.ks-topbar { grid-column: 1 / -1; }
.ks-rail { grid-row: 2; }
.ks-viewport {
  grid-row: 2;
  overflow: hidden;
  position: relative;
  background: var(--canvas);
  display: flex;
  min-width: 0;
}

/* Topbar */
.ks-topbar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 14px 0 14px;
  background: var(--white);
  border-bottom: 1px solid var(--ink-150);
  z-index: 20;
  position: relative;
}
.ks-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  width: calc(var(--rail-w) + 220px);
  flex-shrink: 0;
}
.ks-brand-logo {
  width: 30px; height: 30px;
  border-radius: 7px;
  background: linear-gradient(135deg, var(--ks-primary) 0%, #1064b6 100%);
  display: grid; place-items: center;
  color: white;
  font-family: var(--f-deva);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: -0.3px;
  flex-shrink: 0;
}
.ks-brand-name {
  font-weight: 650;
  color: var(--ink-900);
  font-size: 14.5px;
  letter-spacing: -0.2px;
  line-height: 1.1;
}
.ks-brand-sub {
  font-size: 11px;
  color: var(--ink-500);
  letter-spacing: 0.02em;
}
.ks-org-crumb {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 10px;
  background: var(--ink-100);
  border-radius: var(--r-md);
  color: var(--ink-700);
  font-size: 12.5px;
  font-weight: 500;
  height: 30px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.15s;
}
.ks-org-crumb:hover { background: var(--ink-150); }
.ks-org-crumb .dot { width: 6px; height: 6px; background: var(--ok); border-radius: 999px; }

.ks-search {
  flex: 1;
  max-width: 520px;
  height: 32px;
  background: var(--ink-100);
  border: 1px solid transparent;
  border-radius: var(--r-md);
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 10px;
  color: var(--ink-500);
  font-size: 13px;
  cursor: pointer;
  transition: all 0.15s;
}
.ks-search:hover { background: var(--white); border-color: var(--ink-200); }
.ks-search kbd {
  margin-left: auto;
  background: var(--white);
  border: 1px solid var(--ink-200);
  border-radius: 4px;
  padding: 1px 6px;
  font-family: var(--f-mono);
  font-size: 10.5px;
  color: var(--ink-500);
}

.ks-topbar-actions {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
}
.ks-icon-btn {
  height: 32px;
  min-width: 32px;
  padding: 0 8px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  background: transparent;
  color: var(--ink-600);
  border: none;
  border-radius: var(--r-md);
  font-size: 12.5px;
  font-weight: 500;
  transition: all 0.15s;
  position: relative;
}
.ks-icon-btn:hover { background: var(--ink-100); color: var(--ink-800); }
.ks-icon-btn.active { background: var(--mod-ai-tint); color: var(--mod-ai); }
.ks-icon-btn .badge {
  position: absolute;
  top: 4px; right: 4px;
  width: 6px; height: 6px;
  background: var(--err);
  border-radius: 999px;
  border: 1.5px solid var(--white);
}
.ks-avatar {
  width: 30px; height: 30px;
  border-radius: 999px;
  background: linear-gradient(135deg, #0B4C8C, #6B4EA0);
  color: white;
  display: grid; place-items: center;
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.5px;
  margin-left: 6px;
  cursor: pointer;
}

/* Rail */
.ks-rail {
  background: var(--white);
  border-right: 1px solid var(--ink-150);
  padding: 10px 8px;
  display: flex;
  flex-direction: column;
  gap: 3px;
  overflow-y: auto;
}
.ks-rail-item {
  width: 52px; height: 52px;
  border-radius: var(--r-md);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  background: transparent;
  border: none;
  color: var(--ink-600);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.02em;
  transition: all 0.15s;
  position: relative;
}
.ks-rail-item:hover { background: var(--ink-100); color: var(--ink-800); }
.ks-rail-item.active {
  background: var(--ks-primary-tint);
  color: var(--ks-primary);
}
.ks-rail-item.active::before {
  content: '';
  position: absolute;
  left: -8px; top: 12px; bottom: 12px;
  width: 3px;
  background: var(--ks-primary);
  border-radius: 0 3px 3px 0;
}
.ks-rail-item .mod-swatch {
  width: 22px; height: 22px;
  border-radius: 5px;
  display: grid; place-items: center;
  color: white;
  font-weight: 700;
  font-size: 11px;
  letter-spacing: -0.4px;
}
.ks-rail-divider {
  height: 1px;
  background: var(--ink-150);
  margin: 6px 6px;
}

/* Module viewport wrapping */
.ks-module {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  overflow: hidden;
}

/* Ribbon (Word/Sheets/Slides) */
.ks-ribbon {
  background: var(--white);
  border-bottom: 1px solid var(--ink-150);
  display: flex;
  flex-direction: column;
}
.ks-ribbon-tabs {
  display: flex;
  gap: 2px;
  padding: 6px 12px 0;
  border-bottom: 1px solid var(--ink-150);
  align-items: center;
}
.ks-ribbon-tab {
  padding: 6px 12px;
  border: none;
  background: transparent;
  color: var(--ink-600);
  font-size: 12.5px;
  font-weight: 500;
  border-radius: 6px 6px 0 0;
  position: relative;
  height: 28px;
}
.ks-ribbon-tab:hover { color: var(--ink-800); background: var(--ink-100); }
.ks-ribbon-tab.active { color: var(--ink-900); font-weight: 600; }
.ks-ribbon-tab.active::after {
  content: '';
  position: absolute;
  left: 6px; right: 6px; bottom: -1px;
  height: 2px;
  background: currentColor;
  color: var(--mod-current, var(--ks-primary));
}
.ks-ribbon-body {
  padding: 10px 12px;
  display: flex;
  gap: 4px;
  align-items: center;
  min-height: 56px;
  flex-wrap: wrap;
}
.ks-ribbon-group {
  display: flex;
  align-items: center;
  gap: 2px;
  padding-right: 10px;
  margin-right: 6px;
  border-right: 1px solid var(--ink-150);
  height: 36px;
}
.ks-ribbon-group:last-child { border-right: none; }
.rb-btn {
  height: 30px;
  min-width: 30px;
  padding: 0 8px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: transparent;
  border: 1px solid transparent;
  border-radius: 5px;
  color: var(--ink-700);
  font-size: 12px;
  font-weight: 500;
  transition: all 0.12s;
}
.rb-btn:hover { background: var(--ink-100); border-color: var(--ink-150); }
.rb-btn.active { background: var(--mod-current-tint, var(--ks-primary-tint)); color: var(--mod-current, var(--ks-primary)); }
.rb-select {
  height: 28px;
  padding: 0 8px;
  min-width: 100px;
  background: var(--white);
  border: 1px solid var(--ink-200);
  border-radius: 5px;
  color: var(--ink-800);
  font-size: 12px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.rb-swatch {
  width: 14px; height: 14px;
  border-radius: 3px;
  border: 1px solid rgba(0,0,0,0.1);
}

/* Doc canvas surfaces */
.ks-canvas-scroll {
  flex: 1;
  overflow: auto;
  background: var(--ink-100);
  padding: 24px;
}
.ks-page {
  background: var(--white);
  box-shadow: var(--sh-2);
  border-radius: 3px;
  border: 1px solid var(--ink-150);
}

/* Tables */
.ks-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  font-size: 12.5px;
}
.ks-table th {
  text-align: left;
  font-weight: 550;
  color: var(--ink-500);
  padding: 8px 12px;
  border-bottom: 1px solid var(--ink-150);
  font-size: 11px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  background: var(--ink-50);
}
.ks-table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--ink-150);
  color: var(--ink-800);
}
.ks-table tr:hover td { background: var(--ink-50); }

/* Chip / badge */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 11.5px;
  font-weight: 500;
  background: var(--ink-100);
  color: var(--ink-700);
}
.chip.ok { background: var(--ok-tint); color: var(--ok); }
.chip.warn { background: var(--warn-tint); color: var(--warn); }
.chip.err { background: var(--err-tint); color: var(--err); }
.chip.info { background: var(--ks-primary-tint); color: var(--ks-primary); }
.chip.purple { background: var(--mod-ai-tint); color: var(--mod-ai); }
.chip .dot { width: 6px; height: 6px; border-radius: 999px; background: currentColor; }

/* Card */
.card {
  background: var(--white);
  border: 1px solid var(--ink-150);
  border-radius: var(--r-lg);
  padding: 16px;
}

/* Buttons */
.btn {
  height: 32px;
  padding: 0 14px;
  border-radius: var(--r-md);
  border: 1px solid var(--ink-200);
  background: var(--white);
  color: var(--ink-800);
  font-size: 12.5px;
  font-weight: 550;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.15s;
}
.btn:hover { background: var(--ink-50); border-color: var(--ink-300); }
.btn.primary {
  background: var(--ks-primary);
  color: white;
  border-color: var(--ks-primary);
}
.btn.primary:hover { background: var(--ks-primary-dark); border-color: var(--ks-primary-dark); }
.btn.ai {
  background: linear-gradient(135deg, #7C3AED, #a06dfa);
  color: white;
  border-color: transparent;
}
.btn.ai:hover { filter: brightness(1.06); }
.btn.ghost { background: transparent; border-color: transparent; }
.btn.ghost:hover { background: var(--ink-100); }

/* AI panel */
.ai-panel {
  width: var(--ai-w);
  background: var(--white);
  border-left: 1px solid var(--ink-150);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  overflow: hidden;
}
.ai-panel-header {
  padding: 12px 16px;
  border-bottom: 1px solid var(--ink-150);
  display: flex;
  align-items: center;
  gap: 10px;
}
.ai-avatar {
  width: 28px; height: 28px;
  border-radius: 8px;
  background: linear-gradient(135deg, #7C3AED, #a06dfa);
  display: grid; place-items: center;
  color: white;
  font-weight: 700;
  font-size: 12px;
}

/* Command palette overlay */
.cmd-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 22, 32, 0.35);
  backdrop-filter: blur(2px);
  z-index: 100;
  display: grid;
  place-items: start center;
  padding-top: 15vh;
}
.cmd-box {
  width: 620px;
  max-width: 90vw;
  background: var(--white);
  border-radius: var(--r-xl);
  box-shadow: var(--sh-4);
  overflow: hidden;
  border: 1px solid var(--ink-150);
}

/* Utility */
.row { display: flex; align-items: center; }
.col { display: flex; flex-direction: column; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 12px; }
.gap-4 { gap: 16px; }
.mono { font-family: var(--f-mono); }
.serif { font-family: var(--f-serif); }
.muted { color: var(--ink-500); }
.divider { height: 1px; background: var(--ink-150); }
.grow { flex: 1; }
.text-xs { font-size: 11.5px; }
.text-sm { font-size: 12.5px; }
.text-md { font-size: 14px; }
.text-lg { font-size: 16px; }
.text-xl { font-size: 20px; }
.text-2xl { font-size: 26px; }
.text-3xl { font-size: 34px; }
.b-500 { font-weight: 500; }
.b-600 { font-weight: 600; }
.b-700 { font-weight: 700; }

/* Focus ring */
:focus-visible {
  outline: 2px solid var(--ks-primary);
  outline-offset: 1px;
  border-radius: 4px;
}

/* Scrollbar variants — no scrollbars for inner utilities */
.no-scrollbar::-webkit-scrollbar { display: none; }