/* =============================================================
   Halo — Dark Design System
   A quiet, architectural dark substrate where information is light.
   ============================================================= */

:root {
  /* ---------- Color: Surface tiers ---------- */
  --color-background: #0A0B0F;
  --color-surface: #14151C;
  --color-elevated: #1E2029;
  --color-overlay: rgba(10, 11, 15, 0.72);

  /* ---------- Color: Borders ---------- */
  --color-border: #2A2D38;
  --color-border-strong: #3A3D4A;
  --color-border-soft: rgba(255, 255, 255, 0.04);

  /* ---------- Color: Foreground ---------- */
  --color-text-primary: #F2F4F8;
  --color-text-secondary: #9AA0AE;
  --color-text-muted: #5C6170;
  --color-text-inverse: #0A0B0F;

  /* ---------- Color: Brand ---------- */
  --color-primary: #5B6BFF;
  --color-primary-hover: #7886FF;
  --color-primary-pressed: #4A59E6;
  --color-primary-soft: rgba(91, 107, 255, 0.12);

  /* ---------- Color: Signal ---------- */
  --color-success: #2BE08C;
  --color-warning: #F5D547;
  --color-info: #3DD7E5;
  --color-danger: #FF3A5C;

  --color-success-soft: rgba(43, 224, 140, 0.12);
  --color-warning-soft: rgba(245, 213, 71, 0.14);
  --color-info-soft: rgba(61, 215, 229, 0.14);
  --color-danger-soft: rgba(255, 58, 92, 0.14);

  /* ---------- Typography ---------- */
  --font-display: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  --text-display-size: clamp(2.75rem, 6vw, 4.5rem);
  --text-display-weight: 600;
  --text-display-tracking: -0.03em;
  --text-display-leading: 1.04;

  --text-headline-lg-size: 2.25rem;
  --text-headline-lg-weight: 600;
  --text-headline-lg-tracking: -0.02em;
  --text-headline-lg-leading: 1.12;

  --text-headline-md-size: 1.5rem;
  --text-headline-md-weight: 600;
  --text-headline-md-tracking: -0.015em;
  --text-headline-md-leading: 1.2;

  --text-title-md-size: 1.125rem;
  --text-title-md-weight: 600;
  --text-title-md-tracking: -0.01em;
  --text-title-md-leading: 1.3;

  --text-body-md-size: 0.9375rem;
  --text-body-md-weight: 400;
  --text-body-md-tracking: -0.005em;
  --text-body-md-leading: 1.55;

  --text-body-sm-size: 0.8125rem;
  --text-body-sm-weight: 400;
  --text-body-sm-tracking: 0;
  --text-body-sm-leading: 1.5;

  --text-label-sm-size: 0.75rem;
  --text-label-sm-weight: 500;
  --text-label-sm-tracking: 0.08em;
  --text-label-sm-leading: 1.2;

  --text-mono-sm-size: 0.8125rem;
  --text-mono-sm-weight: 500;
  --text-mono-sm-tracking: 0;
  --text-mono-sm-leading: 1.4;

  --text-metric-size: 2.5rem;
  --text-metric-weight: 600;
  --text-metric-tracking: -0.02em;
  --text-metric-leading: 1;

  /* ---------- Spacing ---------- */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --space-20: 80px;

  /* ---------- Radius ---------- */
  --radius-none: 0px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 999px;

  /* ---------- Border ---------- */
  --border-width: 1px;
  --border-width-thick: 1.5px;

  /* ---------- Elevation ---------- */
  --shadow-sm: 0 1px 0 rgba(255, 255, 255, 0.02) inset, 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.45), 0 1px 0 rgba(255, 255, 255, 0.03) inset;
  --shadow-lg: 0 24px 60px rgba(0, 0, 0, 0.55), 0 1px 0 rgba(255, 255, 255, 0.04) inset;

  /* ---------- Focus ---------- */
  --focus-ring: 0 0 0 3px rgba(91, 107, 255, 0.35);
  --focus-ring-color: rgba(91, 107, 255, 0.35);

  /* ---------- Motion ---------- */
  --motion-fast: 120ms;
  --motion-base: 150ms;
  --motion-slow: 240ms;
  --easing-standard: cubic-bezier(0.2, 0.6, 0.2, 1);

  /* ---------- Layout ---------- */
  --container-max: 1200px;
  --container-pad: clamp(20px, 4vw, 48px);
}

/* =============================================================
   Reset and base
   ============================================================= */

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

html,
body {
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--color-background);
  color: var(--color-text-primary);
  font-family: var(--font-body);
  font-size: var(--text-body-md-size);
  line-height: var(--text-body-md-leading);
  letter-spacing: var(--text-body-md-tracking);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection {
  background-color: var(--color-primary-soft);
  color: var(--color-text-primary);
}

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

hr {
  border: 0;
  border-top: var(--border-width) solid var(--color-border);
  margin: 0;
}

/* =============================================================
   Typography utilities
   ============================================================= */

.t-display {
  font-family: var(--font-display);
  font-size: var(--text-display-size);
  font-weight: var(--text-display-weight);
  letter-spacing: var(--text-display-tracking);
  line-height: var(--text-display-leading);
  color: var(--color-text-primary);
  margin: 0;
}

.t-headline-lg {
  font-family: var(--font-display);
  font-size: var(--text-headline-lg-size);
  font-weight: var(--text-headline-lg-weight);
  letter-spacing: var(--text-headline-lg-tracking);
  line-height: var(--text-headline-lg-leading);
  color: var(--color-text-primary);
  margin: 0;
}

.t-headline-md {
  font-family: var(--font-display);
  font-size: var(--text-headline-md-size);
  font-weight: var(--text-headline-md-weight);
  letter-spacing: var(--text-headline-md-tracking);
  line-height: var(--text-headline-md-leading);
  color: var(--color-text-primary);
  margin: 0;
}

.t-title-md {
  font-family: var(--font-display);
  font-size: var(--text-title-md-size);
  font-weight: var(--text-title-md-weight);
  letter-spacing: var(--text-title-md-tracking);
  line-height: var(--text-title-md-leading);
  color: var(--color-text-primary);
  margin: 0;
}

.t-body-md {
  font-family: var(--font-body);
  font-size: var(--text-body-md-size);
  font-weight: var(--text-body-md-weight);
  letter-spacing: var(--text-body-md-tracking);
  line-height: var(--text-body-md-leading);
  color: var(--color-text-secondary);
  margin: 0;
}

.t-body-sm {
  font-family: var(--font-body);
  font-size: var(--text-body-sm-size);
  font-weight: var(--text-body-sm-weight);
  letter-spacing: var(--text-body-sm-tracking);
  line-height: var(--text-body-sm-leading);
  color: var(--color-text-secondary);
  margin: 0;
}

.t-label-sm {
  font-family: var(--font-display);
  font-size: var(--text-label-sm-size);
  font-weight: var(--text-label-sm-weight);
  letter-spacing: var(--text-label-sm-tracking);
  line-height: var(--text-label-sm-leading);
  color: var(--color-text-secondary);
  text-transform: uppercase;
  margin: 0;
}

.t-mono-sm {
  font-family: var(--font-mono);
  font-size: var(--text-mono-sm-size);
  font-weight: var(--text-mono-sm-weight);
  letter-spacing: var(--text-mono-sm-tracking);
  line-height: var(--text-mono-sm-leading);
  color: var(--color-text-primary);
  margin: 0;
}

.t-metric {
  font-family: var(--font-mono);
  font-size: var(--text-metric-size);
  font-weight: var(--text-metric-weight);
  letter-spacing: var(--text-metric-tracking);
  line-height: var(--text-metric-leading);
  color: var(--color-text-primary);
  font-variant-numeric: tabular-nums;
  margin: 0;
}

.t-muted {
  color: var(--color-text-muted);
}

.t-primary {
  color: var(--color-text-primary);
}

.t-secondary {
  color: var(--color-text-secondary);
}

/* =============================================================
   Layout primitives
   ============================================================= */

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

.stack {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.stack-sm { gap: var(--space-2); }
.stack-md { gap: var(--space-4); }
.stack-lg { gap: var(--space-6); }
.stack-xl { gap: var(--space-10); }

.row {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.row-between {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-4); }
.grid-3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--space-4); }
.grid-4 { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: var(--space-4); }

@media (max-width: 720px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

.divider {
  height: 1px;
  background: var(--color-border);
  border: 0;
  width: 100%;
}

/* =============================================================
   Surfaces
   ============================================================= */

.surface {
  background-color: var(--color-surface);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-lg);
}

.surface-elevated {
  background-color: var(--color-elevated);
  border: var(--border-width) solid var(--color-border-strong);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

/* =============================================================
   Eyebrow + Section header
   ============================================================= */

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-text-secondary);
  font-family: var(--font-display);
  font-size: var(--text-label-sm-size);
  font-weight: var(--text-label-sm-weight);
  letter-spacing: var(--text-label-sm-tracking);
  text-transform: uppercase;
}

.eyebrow::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
  background-color: var(--color-primary);
  box-shadow: 0 0 0 4px var(--color-primary-soft);
}

/* =============================================================
   Buttons
   ============================================================= */

.btn {
  --btn-h: 40px;
  --btn-pad-x: 18px;
  --btn-radius: var(--radius-md);
  --btn-fs: 0.875rem;
  --btn-fw: 500;

  appearance: none;
  -webkit-appearance: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  height: var(--btn-h);
  padding-inline: var(--btn-pad-x);
  border-radius: var(--btn-radius);
  border: var(--border-width) solid transparent;
  font-family: var(--font-display);
  font-size: var(--btn-fs);
  font-weight: var(--btn-fw);
  letter-spacing: -0.005em;
  line-height: 1;
  cursor: pointer;
  user-select: none;
  white-space: nowrap;
  background: transparent;
  color: var(--color-text-primary);
  transition:
    background-color var(--motion-base) var(--easing-standard),
    border-color var(--motion-base) var(--easing-standard),
    color var(--motion-base) var(--easing-standard),
    box-shadow var(--motion-base) var(--easing-standard),
    transform var(--motion-fast) var(--easing-standard);
}

.btn:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

.btn:disabled,
.btn[aria-disabled="true"] {
  opacity: 0.4;
  pointer-events: none;
}

.btn svg,
.btn > i,
.btn .icon {
  width: 16px;
  height: 16px;
  max-width: 16px;
  max-height: 16px;
  flex-shrink: 0;
  stroke-width: 1.75;
}

.btn-sm svg,
.btn-sm > i {
  width: 14px;
  height: 14px;
  max-width: 14px;
  max-height: 14px;
}

.btn-lg svg,
.btn-lg > i {
  width: 18px;
  height: 18px;
  max-width: 18px;
  max-height: 18px;
}

.btn-icon svg,
.btn-icon > i {
  width: 18px;
  height: 18px;
  max-width: 18px;
  max-height: 18px;
}

.btn-icon.btn-sm svg,
.btn-icon.btn-sm > i {
  width: 16px;
  height: 16px;
  max-width: 16px;
  max-height: 16px;
}

.btn-icon.btn-lg svg,
.btn-icon.btn-lg > i {
  width: 20px;
  height: 20px;
  max-width: 20px;
  max-height: 20px;
}

/* Variants */

.btn-primary {
  background-color: var(--color-primary);
  color: #FFFFFF;
  border-color: var(--color-primary);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.18);
}
.btn-primary:hover { background-color: var(--color-primary-hover); border-color: var(--color-primary-hover); }
.btn-primary:active { background-color: var(--color-primary-pressed); border-color: var(--color-primary-pressed); transform: translateY(1px); }

.btn-secondary {
  background-color: var(--color-surface);
  color: var(--color-text-primary);
  border-color: var(--color-border-strong);
}
.btn-secondary:hover { background-color: var(--color-elevated); border-color: var(--color-border-strong); }
.btn-secondary:active { transform: translateY(1px); }

.btn-tertiary {
  background-color: transparent;
  color: var(--color-text-secondary);
  border-color: transparent;
}
.btn-tertiary:hover { background-color: var(--color-surface); color: var(--color-text-primary); }
.btn-tertiary:active { background-color: var(--color-elevated); }

.btn-danger {
  background-color: var(--color-danger);
  color: #FFFFFF;
  border-color: var(--color-danger);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.18);
}
.btn-danger:hover { filter: brightness(1.06); }

/* Sizes */

.btn-sm {
  --btn-h: 32px;
  --btn-pad-x: 12px;
  --btn-fs: 0.8125rem;
  --btn-radius: 8px;
}

.btn-lg {
  --btn-h: 48px;
  --btn-pad-x: 22px;
  --btn-fs: 0.9375rem;
}

.btn-icon {
  padding-inline: 0;
  width: var(--btn-h);
  aspect-ratio: 1 / 1;
}

/* =============================================================
   Inputs and form fields
   ============================================================= */

.field {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.field-label {
  font-family: var(--font-display);
  font-size: var(--text-label-sm-size);
  font-weight: var(--text-label-sm-weight);
  letter-spacing: var(--text-label-sm-tracking);
  text-transform: uppercase;
  color: var(--color-text-secondary);
}

.field-help {
  font-family: var(--font-body);
  font-size: var(--text-body-sm-size);
  color: var(--color-text-muted);
}

.field-help.is-error {
  color: var(--color-danger);
}

.input,
.textarea,
.select {
  appearance: none;
  -webkit-appearance: none;
  width: 100%;
  height: 40px;
  background-color: var(--color-surface);
  color: var(--color-text-primary);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-md);
  padding-inline: 14px;
  font-family: var(--font-body);
  font-size: var(--text-body-md-size);
  letter-spacing: var(--text-body-md-tracking);
  line-height: 1;
  transition:
    border-color var(--motion-base) var(--easing-standard),
    background-color var(--motion-base) var(--easing-standard),
    box-shadow var(--motion-base) var(--easing-standard);
}

.input::placeholder,
.textarea::placeholder {
  color: var(--color-text-muted);
}

.input:hover,
.textarea:hover,
.select:hover {
  border-color: var(--color-border-strong);
}

.input:focus,
.textarea:focus,
.select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: var(--focus-ring);
}

.input:disabled,
.textarea:disabled,
.select:disabled {
  opacity: 0.4;
  pointer-events: none;
}

.input.is-invalid,
.textarea.is-invalid,
.select.is-invalid {
  border-color: var(--color-danger);
  box-shadow: 0 0 0 3px var(--color-danger-soft);
}

.textarea {
  height: auto;
  padding: 12px 14px;
  line-height: 1.5;
  resize: vertical;
  min-height: 96px;
}

.select {
  background-image:
    linear-gradient(45deg, transparent 50%, var(--color-text-secondary) 50%),
    linear-gradient(135deg, var(--color-text-secondary) 50%, transparent 50%);
  background-position:
    calc(100% - 18px) 50%,
    calc(100% - 13px) 50%;
  background-size: 5px 5px, 5px 5px;
  background-repeat: no-repeat;
  padding-right: 36px;
}

.input-group {
  position: relative;
  display: flex;
  align-items: center;
}

.input-group .input {
  padding-left: 38px;
}

.input-group .input-icon {
  position: absolute;
  left: 12px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  color: var(--color-text-muted);
  pointer-events: none;
}

.input-group .input-icon > svg,
.input-group .input-icon > i {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

/* =============================================================
   Cards
   ============================================================= */

.card {
  background-color: var(--color-surface);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  position: relative;
  transition:
    border-color var(--motion-base) var(--easing-standard),
    background-color var(--motion-base) var(--easing-standard);
}

.card:hover {
  border-color: var(--color-border-strong);
}

.card-eyebrow {
  font-family: var(--font-display);
  font-size: var(--text-label-sm-size);
  font-weight: var(--text-label-sm-weight);
  letter-spacing: var(--text-label-sm-tracking);
  text-transform: uppercase;
  color: var(--color-text-secondary);
}

.card-title {
  font-family: var(--font-display);
  font-size: var(--text-title-md-size);
  font-weight: var(--text-title-md-weight);
  letter-spacing: var(--text-title-md-tracking);
  color: var(--color-text-primary);
  margin: 0;
}

.card-body {
  font-family: var(--font-body);
  font-size: var(--text-body-md-size);
  line-height: var(--text-body-md-leading);
  color: var(--color-text-secondary);
  margin: 0;
}

.card-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-2);
  padding-top: var(--space-2);
  margin-top: auto;
}

.card-media {
  margin: calc(var(--space-6) * -1) calc(var(--space-6) * -1) 0;
  height: 160px;
  border-bottom: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  background:
    radial-gradient(circle at 25% 30%, rgba(91, 107, 255, 0.35), transparent 55%),
    radial-gradient(circle at 75% 70%, rgba(61, 215, 229, 0.22), transparent 55%),
    linear-gradient(135deg, #14151C 0%, #1E2029 100%);
}

.card-elevated {
  background-color: var(--color-elevated);
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-md);
}

.card-accent::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background-color: var(--color-primary);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.card-accent[data-accent="success"]::before { background-color: var(--color-success); }
.card-accent[data-accent="warning"]::before { background-color: var(--color-warning); }
.card-accent[data-accent="info"]::before { background-color: var(--color-info); }
.card-accent[data-accent="danger"]::before { background-color: var(--color-danger); }

/* =============================================================
   Checkboxes and radios
   ============================================================= */

.check {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  cursor: pointer;
  user-select: none;
  color: var(--color-text-primary);
  font-size: var(--text-body-md-size);
}

.check input[type="checkbox"],
.check input[type="radio"] {
  appearance: none;
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  background-color: var(--color-surface);
  border: var(--border-width) solid var(--color-border-strong);
  border-radius: 6px;
  position: relative;
  cursor: pointer;
  transition:
    background-color var(--motion-base) var(--easing-standard),
    border-color var(--motion-base) var(--easing-standard),
    box-shadow var(--motion-base) var(--easing-standard);
}

.check input[type="radio"] {
  border-radius: var(--radius-full);
}

.check input[type="checkbox"]:hover,
.check input[type="radio"]:hover {
  border-color: var(--color-primary-hover);
}

.check input[type="checkbox"]:focus-visible,
.check input[type="radio"]:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

.check input[type="checkbox"]:checked,
.check input[type="radio"]:checked {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
}

.check input[type="checkbox"]:checked::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'><polyline points='20 6 9 17 4 12'/></svg>");
  background-repeat: no-repeat;
  background-position: center;
  background-size: 12px 12px;
}

.check input[type="radio"]:checked::after {
  content: "";
  position: absolute;
  inset: 4px;
  background-color: #FFFFFF;
  border-radius: var(--radius-full);
}

.check input:disabled {
  opacity: 0.4;
  pointer-events: none;
}

/* Switch (pill toggle) */

.switch {
  position: relative;
  display: inline-flex;
  align-items: center;
  width: 36px;
  height: 20px;
  cursor: pointer;
}

.switch input {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

.switch .switch-track {
  position: absolute;
  inset: 0;
  background-color: var(--color-elevated);
  border: var(--border-width) solid var(--color-border-strong);
  border-radius: var(--radius-full);
  transition: background-color var(--motion-base) var(--easing-standard), border-color var(--motion-base) var(--easing-standard);
}

.switch .switch-thumb {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 14px;
  height: 14px;
  background-color: var(--color-text-secondary);
  border-radius: var(--radius-full);
  transition: transform var(--motion-base) var(--easing-standard), background-color var(--motion-base) var(--easing-standard);
}

.switch input:checked ~ .switch-track {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
}

.switch input:checked ~ .switch-thumb {
  transform: translateX(16px);
  background-color: #FFFFFF;
}

.switch input:focus-visible ~ .switch-track {
  box-shadow: var(--focus-ring);
}

/* =============================================================
   Tabs (pill-style segmented control)
   ============================================================= */

.tabs {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px;
  background-color: var(--color-surface);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-full);
}

.tab {
  appearance: none;
  -webkit-appearance: none;
  background: transparent;
  border: var(--border-width) solid transparent;
  border-radius: var(--radius-full);
  color: var(--color-text-secondary);
  font-family: var(--font-display);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: -0.005em;
  height: 32px;
  padding-inline: 14px;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  cursor: pointer;
  transition:
    background-color var(--motion-base) var(--easing-standard),
    color var(--motion-base) var(--easing-standard),
    border-color var(--motion-base) var(--easing-standard);
}

.tab:hover {
  background-color: var(--color-elevated);
  color: var(--color-text-primary);
}

.tab[aria-selected="true"],
.tab.is-active {
  background-color: var(--color-elevated);
  color: var(--color-text-primary);
  border-color: var(--color-primary);
}

.tab:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

.tab svg,
.tab > i {
  width: 14px;
  height: 14px;
  max-width: 14px;
  max-height: 14px;
  flex-shrink: 0;
  stroke-width: 1.75;
}

.stat-tile .stat-head svg,
.stat-tile .stat-head > i {
  width: 14px;
  height: 14px;
  max-width: 14px;
  max-height: 14px;
  flex-shrink: 0;
}

/* =============================================================
   Chips, badges, signal pills
   ============================================================= */

.chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  height: 24px;
  padding-inline: 10px;
  border-radius: var(--radius-full);
  background-color: var(--color-primary-soft);
  color: var(--color-primary-hover);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0;
  white-space: nowrap;
  border: var(--border-width) solid transparent;
}

.chip[data-tone="success"] { background-color: var(--color-success-soft); color: var(--color-success); }
.chip[data-tone="warning"] { background-color: var(--color-warning-soft); color: var(--color-warning); }
.chip[data-tone="info"] { background-color: var(--color-info-soft); color: var(--color-info); }
.chip[data-tone="danger"] { background-color: var(--color-danger-soft); color: var(--color-danger); }
.chip[data-tone="neutral"] { background-color: var(--color-elevated); color: var(--color-text-secondary); border-color: var(--color-border); }

.chip svg,
.chip > i,
.chip .icon {
  width: 12px;
  height: 12px;
  max-width: 12px;
  max-height: 12px;
  flex-shrink: 0;
  stroke-width: 1.75;
}

.badge-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
  background-color: var(--color-primary);
}

.badge-dot[data-tone="success"] { background-color: var(--color-success); }
.badge-dot[data-tone="warning"] { background-color: var(--color-warning); }
.badge-dot[data-tone="info"] { background-color: var(--color-info); }
.badge-dot[data-tone="danger"] { background-color: var(--color-danger); }

/* =============================================================
   Signature element: Stat Tile
   ============================================================= */

.stat-tile {
  position: relative;
  background-color: var(--color-surface);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  overflow: hidden;
  transition:
    border-color var(--motion-base) var(--easing-standard),
    transform var(--motion-base) var(--easing-standard);
}

.stat-tile::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background-color: var(--color-primary);
  opacity: 0.9;
}

.stat-tile[data-tone="success"]::before { background-color: var(--color-success); }
.stat-tile[data-tone="warning"]::before { background-color: var(--color-warning); }
.stat-tile[data-tone="info"]::before { background-color: var(--color-info); }
.stat-tile[data-tone="danger"]::before { background-color: var(--color-danger); }

.stat-tile:hover {
  border-color: var(--color-border-strong);
}

.stat-tile .stat-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.stat-tile .stat-eyebrow {
  font-family: var(--font-display);
  font-size: var(--text-label-sm-size);
  font-weight: var(--text-label-sm-weight);
  letter-spacing: var(--text-label-sm-tracking);
  text-transform: uppercase;
  color: var(--color-text-secondary);
}

.stat-tile .stat-value {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 2.25rem;
  letter-spacing: -0.02em;
  line-height: 1;
  color: var(--color-text-primary);
  font-variant-numeric: tabular-nums;
}

.stat-tile .stat-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.stat-tile .stat-foot {
  font-family: var(--font-body);
  font-size: var(--text-body-sm-size);
  color: var(--color-text-muted);
}

.stat-tile .stat-spark {
  width: 96px;
  height: 32px;
  color: var(--color-primary);
}

.stat-tile[data-tone="success"] .stat-spark { color: var(--color-success); }
.stat-tile[data-tone="warning"] .stat-spark { color: var(--color-warning); }
.stat-tile[data-tone="info"] .stat-spark { color: var(--color-info); }
.stat-tile[data-tone="danger"] .stat-spark { color: var(--color-danger); }

.stat-tile.stat-sm { padding: var(--space-4); gap: var(--space-3); }
.stat-tile.stat-sm .stat-value { font-size: 1.75rem; }
.stat-tile.stat-sm .stat-spark { width: 72px; height: 24px; }

.stat-tile.stat-lg { padding: var(--space-6); gap: var(--space-5); }
.stat-tile.stat-lg .stat-value { font-size: 2.75rem; }
.stat-tile.stat-lg .stat-spark { width: 120px; height: 40px; }

/* =============================================================
   Navigation primitives
   ============================================================= */

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  border-bottom: var(--border-width) solid var(--color-border);
}

.nav-brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--color-text-primary);
  text-decoration: none;
}

.nav-brand-mark {
  width: 24px;
  height: 24px;
  border-radius: var(--radius-sm);
  background:
    conic-gradient(from 220deg at 50% 50%, var(--color-primary), #1E2029, var(--color-primary));
  border: var(--border-width) solid var(--color-border-strong);
}

.nav-links {
  display: inline-flex;
  align-items: center;
  gap: var(--space-6);
}

.nav-link {
  font-family: var(--font-display);
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color var(--motion-base) var(--easing-standard);
}

.nav-link:hover,
.nav-link[aria-current="page"] {
  color: var(--color-text-primary);
}

/* =============================================================
   Swatches and token tiles
   ============================================================= */

.swatch {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.swatch-chip {
  height: 92px;
  border-radius: var(--radius-md);
  border: var(--border-width) solid var(--color-border);
}

.swatch-name {
  font-family: var(--font-display);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-text-primary);
}

.swatch-hex {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

/* =============================================================
   Accessibility
   ============================================================= */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition-duration: 0.001ms !important;
    animation-duration: 0.001ms !important;
  }
}