/* ============================================================
   Korver Design System — Deep space / neón glass
   Unified theme for: Dashboard, Creatives, Ads Builder, Funnel Ops
   Tri-tema: dark (base) / light / system
   ============================================================ */

/* ================================================================
   PHASE 0 — Design Tokens, Fonts, Background, Theme System
   ================================================================ */

/* ---- Dark Theme (default) ---- */
:root {
  /* Backgrounds */
  --bg: #05060c;
  --bg-soft: #0a0c16;
  --surface: #0f1219;
  --surface2: #1a1f2e;
  --panel: rgba(255, 255, 255, 0.045);
  --panel-strong: rgba(255, 255, 255, 0.07);

  /* Borders */
  --border: rgba(255, 255, 255, 0.10);
  --border-strong: rgba(255, 255, 255, 0.18);

  /* Text */
  --fg: #eef0ff;
  --fg-secondary: #c4c8e4;
  --muted: #9aa0c3;

  /* Brand / Accent */
  --violet: #8b5cff;
  --violet-hover: #9d75ff;
  --cyan: #00e5d0;
  --magenta: #ff5cc8;
  --accent-grad: linear-gradient(120deg, #8b5cff 0%, #00e5d0 100%);

  /* Legacy compatibility (apps using --primary) */
  --primary: #8b5cff;
  --primary-hover: #9d75ff;

  /* Semantic */
  --ok: #2ee6a6;
  --warn: #ffcf5c;
  --err: #ff6b8b;
  --info: #5cc8ff;
  --success: #2ee6a6;
  --warning: #ffcf5c;
  --error: #ff6b8b;

  /* Effects */
  --shadow: 0 30px 80px -20px rgba(0, 0, 0, 0.7);
  --shadow-sm: 0 4px 20px -4px rgba(0, 0, 0, 0.5);
  --glow: 0 0 0 1px rgba(255,255,255,.06), 0 20px 60px -15px rgba(139, 92, 255, .35);
  --glow-sm: 0 0 0 1px rgba(255,255,255,.06), 0 8px 24px -8px rgba(139, 92, 255, .25);

  /* Radii */
  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 18px;
  --radius-xl: 22px;
  --radius-full: 999px;

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition: 0.25s ease;
  --transition-slow: 0.4s ease;

  color-scheme: dark;
}

/* ---- Light Theme ---- */
:root[data-theme="light"],
:root.theme-light,
body.theme-light {
  --bg: #f6f7fc;
  --bg-soft: #ffffff;
  --surface: #ffffff;
  --surface2: #f0f1f8;
  --panel: rgba(255, 255, 255, 0.75);
  --panel-strong: rgba(255, 255, 255, 0.92);
  --border: rgba(15, 17, 40, 0.10);
  --border-strong: rgba(15, 17, 40, 0.16);
  --fg: #0d1030;
  --fg-secondary: #3b3f5c;
  --muted: #5b6190;
  --violet: #6b3cff;
  --violet-hover: #5a2be6;
  --cyan: #00b3a4;
  --magenta: #e23ba0;
  --accent-grad: linear-gradient(120deg, #6b3cff 0%, #00b3a4 100%);
  --primary: #6b3cff;
  --primary-hover: #5a2be6;
  --ok: #0fa87a;
  --warn: #d4a028;
  --err: #e04466;
  --success: #0fa87a;
  --warning: #d4a028;
  --error: #e04466;
  --shadow: 0 30px 70px -28px rgba(40, 30, 120, 0.18);
  --shadow-sm: 0 4px 16px -4px rgba(40, 30, 120, 0.12);
  --glow: 0 0 0 1px rgba(15,17,40,.05), 0 18px 50px -18px rgba(107, 60, 255, .18);
  --glow-sm: 0 0 0 1px rgba(15,17,40,.05), 0 6px 20px -6px rgba(107, 60, 255, .12);
  color-scheme: light;
}

/* ---- System Theme: follow OS preference ---- */
@media (prefers-color-scheme: light) {
  :root[data-theme="system"] {
    --bg: #f6f7fc;
    --bg-soft: #ffffff;
    --surface: #ffffff;
    --surface2: #f0f1f8;
    --panel: rgba(255,255,255,.75);
    --panel-strong: rgba(255,255,255,.92);
    --border: rgba(15,17,40,.10);
    --border-strong: rgba(15,17,40,.16);
    --fg: #0d1030;
    --fg-secondary: #3b3f5c;
    --muted: #5b6190;
    --violet: #6b3cff;
    --violet-hover: #5a2be6;
    --cyan: #00b3a4;
    --magenta: #e23ba0;
    --accent-grad: linear-gradient(120deg, #6b3cff 0%, #00b3a4 100%);
    --primary: #6b3cff;
    --primary-hover: #5a2be6;
    --shadow: 0 30px 70px -28px rgba(40,30,120,.18);
    --glow: 0 0 0 1px rgba(15,17,40,.05), 0 18px 50px -18px rgba(107,60,255,.18);
    color-scheme: light;
  }
}

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

/* ---- Typography ---- */
html { scroll-behavior: smooth; }

body {
  min-height: 100vh;
  background: var(--bg);
  color: var(--fg);
  font-family: "Inter", "Outfit", system-ui, -apple-system, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  line-height: 1.55;
  overflow-x: hidden;
  transition: background var(--transition-slow), color var(--transition);
}

/* ---- Background: glow orbs + grid ---- */
.k-space { position: fixed; inset: 0; z-index: -1; overflow: hidden; pointer-events: none; }
.k-orb {
  position: absolute; width: 60vw; height: 60vw; border-radius: 50%;
  filter: blur(90px); opacity: .55; mix-blend-mode: screen;
  animation: k-drift 22s ease-in-out infinite alternate;
}
.k-orb--violet  { background: radial-gradient(circle, #8b5cff, transparent 60%); top: -18vw; left: -10vw; }
.k-orb--cyan    { background: radial-gradient(circle, #00e5d0, transparent 60%); bottom: -22vw; right: -8vw; animation-delay: -7s; }
.k-orb--magenta { background: radial-gradient(circle, #ff5cc8, transparent 60%); top: 30vw; right: 20vw; width: 40vw; height: 40vw; animation-delay: -13s; opacity: .35; }

:root[data-theme="light"] .k-orb,
body.theme-light .k-orb { opacity: .15; }
@media (prefers-color-scheme: light) { :root[data-theme="system"] .k-orb { opacity: .15; } }

.k-grid-overlay {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 54px 54px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 30%, transparent 75%);
  opacity: .4;
}

@keyframes k-drift {
  to { transform: translate3d(4vw, 6vh, 0) scale(1.12); }
}

/* ---- Gradient text utility ---- */
.k-grad {
  background: var(--accent-grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  background-size: 200% auto;
  animation: k-shimmer 6s linear infinite;
}
@keyframes k-shimmer { to { background-position: 200% center; } }

/* ---- Glass utility ---- */
.k-glass {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  backdrop-filter: blur(16px) saturate(140%);
  box-shadow: var(--shadow);
}
.k-glass-sm {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(12px) saturate(130%);
  box-shadow: var(--shadow-sm);
}

/* ---- Scrollbar ---- */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg-soft); }
::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--muted); }

/* ---- Animations ---- */
@keyframes k-rise { from { opacity: 0; transform: translateY(14px); } }
@keyframes k-pulse { 0%,100% { opacity: 1; } 50% { opacity: .45; } }
@keyframes k-spin { to { transform: rotate(360deg); } }

/* ---- Reduced motion ---- */
/* ================================================================
   PHASE 1 — Shared Components
   ================================================================ */

/* ---- Buttons ---- */
.k-btn {
  display: inline-flex; align-items: center; gap: .5rem;
  border: 0; cursor: pointer; font: inherit;
  font-weight: 600; font-size: .88rem;
  padding: .6rem 1.1rem; border-radius: var(--radius);
  transition: transform var(--transition-fast), box-shadow var(--transition), background-position var(--transition), filter var(--transition-fast);
  white-space: nowrap; text-decoration: none; line-height: 1.3;
}
.k-btn:active { transform: translateY(0) scale(.98); }
.k-btn:disabled { opacity: .55; cursor: not-allowed; pointer-events: none; }

.k-btn-primary {
  color: #fff; background: var(--accent-grad); background-size: 160% auto;
  box-shadow: 0 10px 30px -8px var(--violet);
}
.k-btn-primary:hover { background-position: right center; box-shadow: 0 14px 38px -6px var(--violet); transform: translateY(-1px); }

.k-btn-ghost {
  background: var(--panel); border: 1px solid var(--border);
  color: var(--muted); backdrop-filter: blur(8px);
}
.k-btn-ghost:hover { color: var(--fg); border-color: var(--border-strong); }

.k-btn-danger {
  color: #fff; background: linear-gradient(120deg, #ff5c7a, #ff3b6b);
  box-shadow: 0 8px 24px -8px var(--err);
}
.k-btn-danger:hover { filter: brightness(1.08); transform: translateY(-1px); }

.k-btn-sm { font-size: .78rem; padding: .4rem .75rem; border-radius: var(--radius-sm); gap: .35rem; }
.k-btn-xs { font-size: .72rem; padding: .25rem .55rem; border-radius: 6px; gap: .25rem; }
.k-btn-icon { padding: .5rem; aspect-ratio: 1; justify-content: center; }

/* ---- Badges ---- */
.k-badge {
  display: inline-flex; align-items: center; gap: .35rem;
  font-size: .72rem; font-weight: 600; padding: .2rem .6rem;
  border-radius: var(--radius-full); white-space: nowrap;
}
.k-badge::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: currentColor; flex-shrink: 0; }

.k-badge-ok { color: var(--ok); background: color-mix(in srgb, var(--ok) 14%, transparent); }
.k-badge-warn { color: var(--warn); background: color-mix(in srgb, var(--warn) 14%, transparent); }
.k-badge-warn::before { animation: k-pulse 1.2s infinite; }
.k-badge-err { color: var(--err); background: color-mix(in srgb, var(--err) 14%, transparent); }
.k-badge-info { color: var(--info); background: color-mix(in srgb, var(--info) 14%, transparent); }
.k-badge-muted { color: var(--muted); background: color-mix(in srgb, var(--muted) 14%, transparent); }
.k-badge-violet { color: var(--violet); background: color-mix(in srgb, var(--violet) 14%, transparent); }

/* No-dot variant */
.k-badge-flat::before { display: none; }

/* ---- Cards ---- */
.k-card {
  position: relative; overflow: hidden;
  background: var(--panel); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 1.1rem 1.2rem;
  backdrop-filter: blur(14px);
  transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition);
}
.k-card:hover { transform: translateY(-2px); border-color: var(--border-strong); box-shadow: var(--glow-sm); }
.k-card-static:hover { transform: none; box-shadow: none; }
.k-card-rise { animation: k-rise .5s cubic-bezier(.2,.7,.2,1) both; }

/* Surface card (solid bg, no glass) */
.k-surface {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.1rem 1.2rem;
}
.k-surface-2 {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
}

/* ---- Forms ---- */
.k-input,
.k-select,
.k-textarea {
  width: 100%; display: block;
  background: var(--bg-soft); border: 1px solid var(--border);
  color: var(--fg); font: inherit; font-size: .9rem;
  padding: .6rem .85rem; border-radius: var(--radius);
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}
.k-input:focus, .k-select:focus, .k-textarea:focus {
  border-color: var(--violet);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--violet) 18%, transparent);
}
.k-input::placeholder, .k-textarea::placeholder { color: var(--muted); opacity: .7; }
.k-input:disabled, .k-select:disabled, .k-textarea:disabled { opacity: .5; cursor: not-allowed; }

.k-input-sm { font-size: .8rem; padding: .4rem .65rem; }
.k-select { cursor: pointer; appearance: auto; }
.k-textarea { resize: vertical; min-height: 80px; }

.k-label {
  display: block; font-size: .75rem; font-weight: 600;
  color: var(--muted); text-transform: uppercase; letter-spacing: .04em;
  margin-bottom: .4rem;
}

/* Checkbox */
.k-checkbox {
  -webkit-appearance: none; appearance: none;
  width: 16px; height: 16px; border: 2px solid var(--border-strong);
  border-radius: 4px; cursor: pointer; flex-shrink: 0;
  transition: var(--transition-fast);
  position: relative;
}
.k-checkbox:checked {
  background: var(--accent-grad); border-color: var(--violet);
}
.k-checkbox:checked::after {
  content: "\2713"; position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 11px; font-weight: 700;
}
.k-checkbox:focus-visible { box-shadow: 0 0 0 3px color-mix(in srgb, var(--violet) 25%, transparent); }

/* Toggle */
.k-toggle {
  -webkit-appearance: none; appearance: none;
  width: 36px; height: 20px; border-radius: var(--radius-full);
  background: var(--border-strong); cursor: pointer;
  position: relative; transition: background var(--transition-fast);
}
.k-toggle::after {
  content: ""; position: absolute; top: 2px; left: 2px;
  width: 16px; height: 16px; border-radius: 50%;
  background: #fff; transition: transform var(--transition-fast);
}
.k-toggle:checked { background: var(--violet); }
.k-toggle:checked::after { transform: translateX(16px); }

/* ---- Tables ---- */
.k-table-wrap {
  overflow-x: auto; border: 1px solid var(--border);
  border-radius: var(--radius-lg); background: var(--panel);
  backdrop-filter: blur(10px);
}
.k-table {
  width: 100%; border-collapse: collapse; font-size: .85rem;
}
.k-table th {
  text-align: left; font-size: .72rem; font-weight: 700;
  color: var(--muted); text-transform: uppercase; letter-spacing: .04em;
  padding: .75rem .65rem; border-bottom: 1px solid var(--border);
  background: var(--bg-soft); position: sticky; top: 0; z-index: 1;
}
.k-table td {
  padding: .6rem .65rem; border-bottom: 1px solid var(--border);
  color: var(--fg-secondary); vertical-align: middle;
}
.k-table tbody tr { transition: background var(--transition-fast); }
.k-table tbody tr:hover { background: color-mix(in srgb, var(--violet) 4%, transparent); }
.k-table tbody tr:last-child td { border-bottom: 0; }

/* Right-aligned metric cells */
.k-table .k-num { text-align: right; font-variant-numeric: tabular-nums; font-weight: 600; }
.k-table .k-num-ok { color: var(--ok); }
.k-table .k-num-warn { color: var(--warn); }
.k-table .k-num-err { color: var(--err); }
.k-table .k-num-violet { color: var(--violet); }
.k-table .k-num-muted { color: var(--muted); }

/* ---- Modals ---- */
.k-modal-overlay {
  position: fixed; inset: 0; z-index: 100;
  display: grid; place-items: center;
  padding: 1rem;
}
.k-modal-overlay[hidden] { display: none; }
.k-modal-backdrop {
  position: absolute; inset: 0;
  background: rgba(0,0,0,.55); backdrop-filter: blur(5px);
}
.k-modal {
  position: relative; width: 100%;
  animation: k-rise .3s cubic-bezier(.2,.7,.2,1) both;
}
.k-modal-sm { max-width: 400px; }
.k-modal-md { max-width: 560px; }
.k-modal-lg { max-width: 720px; }
.k-modal-xl { max-width: 960px; }
.k-modal-full { max-width: 90vw; max-height: 90vh; }

.k-modal-header {
  padding: 1.2rem 1.4rem; border-bottom: 1px solid var(--border);
}
.k-modal-header h3 { font-size: 1.15rem; font-weight: 800; letter-spacing: -.02em; }
.k-modal-body { padding: 1.2rem 1.4rem; overflow-y: auto; max-height: 70vh; }
.k-modal-footer {
  padding: .8rem 1.4rem; border-top: 1px solid var(--border);
  display: flex; gap: .6rem; justify-content: flex-end;
}

/* ---- Toasts ---- */
.k-toast-container {
  position: fixed; bottom: 1.2rem; right: 1.2rem;
  display: flex; flex-direction: column; gap: .5rem;
  z-index: 9999; pointer-events: none;
}
.k-toast {
  pointer-events: auto; padding: .7rem 1rem;
  border-radius: var(--radius); border: 1px solid var(--border);
  background: var(--surface2); color: var(--fg);
  font-size: .85rem; backdrop-filter: blur(12px);
  animation: k-rise .35s cubic-bezier(.2,.7,.2,1) both;
  max-width: 380px;
}
.k-toast-ok { border-color: var(--ok); color: var(--ok); }
.k-toast-err { border-color: var(--err); color: var(--err); }
.k-toast-warn { border-color: var(--warn); color: var(--warn); }

/* ---- Tabs ---- */
.k-tabs {
  display: flex; gap: 0; border-bottom: 1px solid var(--border);
}
.k-tab {
  padding: .65rem 1.1rem; font-size: .85rem; font-weight: 600;
  color: var(--muted); cursor: pointer; border: 0; background: transparent;
  border-bottom: 2px solid transparent; transition: color var(--transition-fast), border-color var(--transition-fast);
  white-space: nowrap;
}
.k-tab:hover { color: var(--fg); }
.k-tab.active { color: var(--violet); border-bottom-color: var(--violet); }

/* ---- Sidebar ---- */
.k-sidebar {
  width: 16rem; flex-shrink: 0; display: flex; flex-direction: column;
  background: var(--bg-soft); border-right: 1px solid var(--border);
  overflow-y: auto; transition: width var(--transition);
}
.k-sidebar-item {
  display: flex; align-items: center; gap: .65rem;
  padding: .55rem .9rem; margin: .1rem .5rem;
  border-radius: var(--radius-sm); cursor: pointer;
  color: var(--muted); font-size: .88rem; font-weight: 500;
  transition: background var(--transition-fast), color var(--transition-fast);
  text-decoration: none;
}
.k-sidebar-item:hover { background: var(--panel-strong); color: var(--fg); }
.k-sidebar-item.active { background: color-mix(in srgb, var(--violet) 12%, transparent); color: var(--violet); }
.k-sidebar-item i { width: 1.2rem; text-align: center; flex-shrink: 0; }

/* ---- Header ---- */
.k-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: .8rem 1.5rem; border-bottom: 1px solid var(--border);
  backdrop-filter: blur(12px); background: color-mix(in srgb, var(--bg) 80%, transparent);
  position: sticky; top: 0; z-index: 20;
}

/* ---- Loading ---- */
.k-skeleton {
  background: linear-gradient(90deg, var(--panel) 25%, var(--panel-strong) 50%, var(--panel) 75%);
  background-size: 200% 100%;
  animation: k-skeleton-shimmer 1.5s ease-in-out infinite;
  border-radius: var(--radius-sm);
}
@keyframes k-skeleton-shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

.k-spinner {
  display: inline-block; width: 1em; height: 1em;
  border: 2px solid var(--border); border-top-color: var(--violet);
  border-radius: 50%; animation: k-spin .6s linear infinite;
}

/* ---- Empty state ---- */
.k-empty {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  padding: 3rem 1.5rem; text-align: center; color: var(--muted);
}
.k-empty i, .k-empty svg { font-size: 2.5rem; opacity: .3; margin-bottom: .8rem; }
.k-empty p { font-size: .9rem; max-width: 32ch; }

/* ---- Chips ---- */
.k-chip {
  display: inline-flex; align-items: center; gap: .3rem;
  font-size: .72rem; color: var(--muted); padding: .2rem .55rem;
  border: 1px solid var(--border); border-radius: var(--radius-full);
  font-family: "JetBrains Mono", "Fira Code", monospace;
}
.k-chip-remove { cursor: pointer; opacity: .5; transition: opacity var(--transition-fast); }
.k-chip-remove:hover { opacity: 1; color: var(--err); }

/* ---- Dropdown / Popover ---- */
.k-dropdown {
  position: absolute; z-index: 50;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); box-shadow: var(--shadow);
  backdrop-filter: blur(16px); overflow: hidden;
  animation: k-rise .2s cubic-bezier(.2,.7,.2,1) both;
}
.k-dropdown-item {
  display: flex; align-items: center; gap: .5rem;
  padding: .5rem .85rem; font-size: .85rem; color: var(--fg-secondary);
  cursor: pointer; transition: background var(--transition-fast);
}
.k-dropdown-item:hover { background: color-mix(in srgb, var(--violet) 8%, transparent); color: var(--fg); }
.k-dropdown-item.active { color: var(--violet); }
.k-dropdown-divider { height: 1px; background: var(--border); margin: .3rem 0; }

/* ---- Progress bar ---- */
.k-progress { height: 6px; background: var(--panel-strong); border-radius: var(--radius-full); overflow: hidden; }
.k-progress-fill {
  height: 100%; background: var(--accent-grad); border-radius: var(--radius-full);
  transition: width var(--transition);
}

/* ---- Dividers ---- */
.k-divider { height: 1px; background: var(--border); margin: .8rem 0; }
.k-divider-v { width: 1px; background: var(--border); align-self: stretch; }

/* ---- Stepper ---- */
.k-step-list { display: flex; flex-direction: column; gap: .5rem; }
.k-step {
  display: flex; align-items: center; gap: .65rem;
  color: var(--muted); font-size: .9rem;
}
.k-step-num {
  width: 24px; height: 24px; border-radius: 50%;
  border: 2px solid var(--border-strong);
  display: grid; place-items: center; font-size: .7rem; font-weight: 700; flex-shrink: 0;
}
.k-step.done { color: var(--fg); }
.k-step.done .k-step-num { background: var(--ok); border-color: var(--ok); color: #001b12; }
.k-step.active { color: var(--fg); }
.k-step.active .k-step-num { border-color: var(--violet); box-shadow: 0 0 0 4px color-mix(in srgb, var(--violet) 22%, transparent); animation: k-pulse 1.3s ease-in-out infinite; }
.k-step.error .k-step-num { background: var(--err); border-color: var(--err); color: #fff; }

/* ---- Widget grid (dashboard) ---- */
.k-widget-grid {
  display: grid; gap: 1rem;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
}
.k-widget {
  background: linear-gradient(135deg, var(--surface2), var(--surface));
  border: 1px solid var(--border); border-radius: var(--radius-xl);
  overflow: hidden; transition: border-color var(--transition-fast), box-shadow var(--transition);
}
.k-widget:hover { border-color: var(--border-strong); box-shadow: var(--glow-sm); }

/* ---- Avatar / user icon ---- */
.k-avatar {
  width: 2rem; height: 2rem; border-radius: 50%;
  background: color-mix(in srgb, var(--violet) 20%, transparent);
  color: var(--violet); display: flex; align-items: center; justify-content: center;
  font-size: .8rem; font-weight: 700; flex-shrink: 0;
}
.k-avatar-sm { width: 1.5rem; height: 1.5rem; font-size: .65rem; }

/* ---- Theme switch ---- */
.k-theme-switch {
  display: flex; gap: .15rem; padding: .25rem;
  background: var(--panel); border: 1px solid var(--border);
  border-radius: var(--radius-full); backdrop-filter: blur(10px);
}
.k-theme-switch button {
  width: 2rem; height: 2rem; border: 0; border-radius: var(--radius-full);
  background: transparent; color: var(--muted); cursor: pointer;
  font-size: 1rem; line-height: 1; transition: var(--transition-fast);
}
.k-theme-switch button:hover { color: var(--fg); }
.k-theme-switch button[aria-pressed="true"] {
  background: var(--accent-grad); color: #fff;
  box-shadow: 0 0 18px -4px var(--violet);
}

/* ---- Utility classes ---- */
.k-text-ok { color: var(--ok); }
.k-text-warn { color: var(--warn); }
.k-text-err { color: var(--err); }
.k-text-violet { color: var(--violet); }
.k-text-muted { color: var(--muted); }
.k-text-mono { font-family: "JetBrains Mono", "Fira Code", monospace; }
.k-text-center { text-align: center; }
.k-text-right { text-align: right; }
.k-text-xs { font-size: .72rem; }
.k-text-sm { font-size: .82rem; }
.k-text-lg { font-size: 1.15rem; }
.k-text-xl { font-size: 1.4rem; }
.k-font-bold { font-weight: 700; }
.k-font-black { font-weight: 900; }
.k-truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.k-tabular { font-variant-numeric: tabular-nums; }

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