/* ============================================================
   ELEVATED ORBIT — Base / Component Primitives  v1.1
   Consumes brand/tokens.css. Light is default; dark via
   html[data-theme="dark"]. Every interactive primitive ships
   default / hover / active / focus-visible / disabled.

   Load order:  tokens.css  →  base.css  →  page styles.

   Backs the real EO Astro site, so it is production-grade:
   - No hardcoded colours (all reference tokens).
   - WCAG-AA contrast (see tokens.css HARD RULES a–d).
   - Colour never the only signal (state = icon + text).
   ============================================================ */

/* ---------------------------------------------------------- *
 * 1. Reset + base
 * ---------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

* {
  margin: 0;
}

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  tab-size: 4;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  font-weight: var(--weight-reg);
  color: var(--fg);
  background-color: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  min-height: 100vh;
}

/* Headings use the display family, snug leading, tight tracking */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-display);
  line-height: var(--leading-snug);
  letter-spacing: var(--track-tight);
  font-weight: var(--weight-bold);
  color: var(--fg);
  text-wrap: balance;
}

h1 {
  font-size: var(--text-4xl);
  line-height: var(--leading-tight);
  letter-spacing: var(--track-display);
}
h2 {
  font-size: var(--text-3xl);
}
h3 {
  font-size: var(--text-2xl);
}
h4 {
  font-size: var(--text-xl);
}
h5 {
  font-size: var(--text-lg);
}
h6 {
  font-size: var(--text-base);
  font-weight: var(--weight-semi);
}

p {
  text-wrap: pretty;
}

ul,
ol {
  padding-left: var(--s-5);
}

small {
  font-size: var(--text-sm);
}

code,
kbd,
samp,
pre {
  font-family: var(--font-mono);
  font-size: 0.9375em;
}

/* Numeric / tabular figures — line up dollar amounts + tables */
.tnum,
[data-tnum],
td.num,
th.num {
  font-feature-settings: "tnum", "lnum";
  font-variant-numeric: tabular-nums lining-nums;
}

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

hr {
  border: 0;
  border-top: 1px solid var(--border);
  margin: var(--s-6) 0;
}

::selection {
  background: var(--eo-aurora-tint);
  color: var(--eo-ink);
}

/* ---------------------------------------------------------- *
 * 2. Global focus-visible (consumes --focus-ring)
 * ---------------------------------------------------------- */
:where(a, button, input, textarea, select, summary, [tabindex]):focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
  border-radius: var(--r-xs);
}

/* Mouse users don't get the ring; keyboard users always do */
:focus:not(:focus-visible) {
  outline: none;
}

@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;
  }
}

/* Visually-hidden helper for icon+text labels read by AT only */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ---------------------------------------------------------- *
 * 3. Layout helpers (containers / gutters)
 * ---------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container-xl);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.container-sm {
  max-width: var(--container-sm);
}
.container-md {
  max-width: var(--container-md);
}
.container-lg {
  max-width: var(--container-lg);
}
.container-2xl {
  max-width: var(--container-2xl);
}

/* ---------------------------------------------------------- *
 * 4. THE 4-RUNG ACTION LADDER
 *    One accent, four treatments. Primary > Secondary >
 *    Tertiary > inline link. Differentiated by FILL/WEIGHT,
 *    never by hue. (tokens HARD RULES b + c.)
 * ---------------------------------------------------------- */
.btn-primary,
.btn-secondary,
.btn-tertiary {
  --_btn-gap: var(--s-2);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--_btn-gap);
  min-height: var(--control-min-tap); /* 48px touch floor */
  padding: 0 var(--s-5);
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: var(--weight-semi);
  line-height: 1;
  letter-spacing: var(--track-tight);
  text-decoration: none;
  cursor: pointer;
  border: 1.5px solid transparent;
  border-radius: var(--r-full); /* RULE (c): pill reserved for CTAs */
  touch-action: manipulation;
  user-select: none;
  transition:
    background-color var(--dur-fast) var(--ease-out),
    color var(--dur-fast) var(--ease-out),
    border-color var(--dur-fast) var(--ease-out),
    box-shadow var(--dur-base) var(--ease-out),
    transform var(--dur-fast) var(--ease-out);
}

.btn-primary svg,
.btn-secondary svg,
.btn-tertiary svg {
  width: 1.15em;
  height: 1.15em;
  flex: none;
}

/* — Rung 1: PRIMARY — solid accent fill, glow on hover — */
.btn-primary {
  background-color: var(--accent);
  color: var(
    --on-accent
  ); /* white on #1c6fd6 (AA); deep-space on glow in dark */
  border-color: var(--accent);
}
.btn-primary:hover {
  background-color: var(--accent);
  box-shadow: var(--glow);
  transform: translateY(-1px);
}
.btn-primary:active {
  background-color: var(--eo-aurora-press);
  border-color: var(--eo-aurora-press);
  box-shadow: none;
  transform: translateY(0);
}
.btn-primary:focus-visible {
  box-shadow: var(--focus-ring);
}
/* On dark, the fill is aurora-glow → text must be deep-space (RULE b) */
html[data-theme="dark"] .btn-primary {
  color: var(--on-glow);
}

/* — Rung 2: SECONDARY — accent outline, transparent fill — */
.btn-secondary {
  background-color: transparent;
  color: var(--accent-text);
  border-color: var(--accent);
}
.btn-secondary:hover {
  background-color: var(--eo-aurora-tint);
  border-color: var(--accent);
}
html[data-theme="dark"] .btn-secondary:hover {
  background-color: color-mix(in srgb, var(--accent) 14%, transparent);
}
.btn-secondary:active {
  background-color: color-mix(in srgb, var(--accent) 22%, transparent);
  color: var(--eo-aurora-press);
  border-color: var(--eo-aurora-press);
}
.btn-secondary:focus-visible {
  box-shadow: var(--focus-ring);
}

/* — Rung 3: TERTIARY — ghost text + chevron, no border — */
.btn-tertiary {
  background-color: transparent;
  color: var(--accent-text);
  border-color: transparent;
  padding-inline: var(--s-3);
}
.btn-tertiary::after {
  content: "›";
  font-size: 1.25em;
  line-height: 0;
  transition: transform var(--dur-fast) var(--ease-out);
}
.btn-tertiary:hover {
  color: var(--eo-aurora-press);
  background-color: var(--surface-2);
}
.btn-tertiary:hover::after {
  transform: translateX(3px);
}
html[data-theme="dark"] .btn-tertiary:hover {
  color: var(--accent);
}
.btn-tertiary:active {
  background-color: color-mix(in srgb, var(--fg) 8%, transparent);
}
.btn-tertiary:focus-visible {
  box-shadow: var(--focus-ring);
}

/* — Disabled (all rungs) — */
.btn-primary:disabled,
.btn-primary[aria-disabled="true"],
.btn-secondary:disabled,
.btn-secondary[aria-disabled="true"],
.btn-tertiary:disabled,
.btn-tertiary[aria-disabled="true"] {
  cursor: not-allowed;
  opacity: 0.5;
  box-shadow: none;
  transform: none;
  pointer-events: none;
}

/* — Rung 4: inline link — underlined accent in prose — */
a {
  color: var(--accent-text);
  text-decoration: underline;
  text-underline-offset: 2px;
  text-decoration-thickness: 1px;
  transition: color var(--dur-fast) var(--ease-out);
}
a:hover {
  color: var(--eo-aurora-press);
  text-decoration-thickness: 2px;
}
html[data-theme="dark"] a:hover {
  color: var(--accent);
}
a:active {
  color: var(--eo-aurora-press);
}
a:focus-visible {
  box-shadow: var(--focus-ring);
  border-radius: var(--r-xs);
  text-decoration: none;
}

/* ---------------------------------------------------------- *
 * 5. Form controls
 *    16px+ font (stop iOS zoom). --border-ui resting border.
 *    All states: default/hover/focus/filled/error/disabled.
 * ---------------------------------------------------------- */
.field {
  display: flex;
  flex-direction: column;
  gap: var(--field-gap);
  margin-bottom: var(--field-stack);
}
.field > label,
.label {
  font-family: var(--font-body);
  font-size: var(--field-label-size);
  font-weight: var(--field-label-weight);
  color: var(--fg);
}
.field-hint {
  font-size: var(--field-hint-size);
  color: var(--field-hint-color);
}
.required-mark {
  color: var(--error);
  margin-left: 2px;
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="search"],
input[type="tel"],
input[type="url"],
input[type="number"],
input[type="date"],
textarea,
select {
  width: 100%;
  min-height: var(--control-h-md);
  padding: var(--input-pad-y) var(--input-pad-x);
  font-family: var(--font-body);
  font-size: var(--input-font); /* >=16px equiv */
  line-height: 1.4;
  color: var(--input-fg);
  background-color: var(--input-bg);
  border: 1.5px solid var(--input-border);
  border-radius: var(--input-radius); /* NOT pill (RULE c) */
  transition:
    border-color var(--dur-fast) var(--ease-out),
    box-shadow var(--dur-fast) var(--ease-out),
    background-color var(--dur-fast) var(--ease-out);
  appearance: none;
}

textarea {
  min-height: calc(var(--control-h-md) * 2.2);
  resize: vertical;
  line-height: var(--leading-body);
}

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

/* hover */
input:hover:not(:disabled):not([aria-invalid="true"]),
textarea:hover:not(:disabled):not([aria-invalid="true"]),
select:hover:not(:disabled):not([aria-invalid="true"]) {
  border-color: var(--input-border-hover);
}

/* focus */
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: none;
  border-color: var(--input-border-focus);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 22%, transparent);
}

/* filled — a non-empty value subtly confirms input */
input:not(:placeholder-shown):not(:disabled),
textarea:not(:placeholder-shown):not(:disabled) {
  border-color: var(--eo-border-strong);
}

/* error — border + role=alert message + icon (RULE d) */
input[aria-invalid="true"],
textarea[aria-invalid="true"],
select[aria-invalid="true"],
.field--error input,
.field--error textarea,
.field--error select {
  border-color: var(--input-border-error);
}
input[aria-invalid="true"]:focus-visible,
textarea[aria-invalid="true"]:focus-visible,
select[aria-invalid="true"]:focus-visible {
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--error) 24%, transparent);
}
.field-error {
  display: flex;
  align-items: center;
  gap: var(--s-1);
  font-size: var(--field-hint-size);
  font-weight: var(--weight-med);
  color: var(--field-error-color);
}
.field-error::before {
  content: "⚠";
  font-size: 1em;
  line-height: 1;
}

/* disabled */
input:disabled,
textarea:disabled,
select:disabled {
  cursor: not-allowed;
  opacity: 0.6;
  background-color: var(--input-disabled-bg);
  border-color: var(--border);
}

/* select chevron */
select {
  background-image:
    linear-gradient(45deg, transparent 50%, var(--muted) 50%),
    linear-gradient(135deg, var(--muted) 50%, transparent 50%);
  background-position:
    calc(100% - 20px) calc(50% - 2px),
    calc(100% - 15px) calc(50% - 2px);
  background-size:
    5px 5px,
    5px 5px;
  background-repeat: no-repeat;
  padding-right: var(--s-7);
}

/* — Checkbox + radio — */
input[type="checkbox"],
input[type="radio"] {
  appearance: none;
  width: 1.25rem;
  height: 1.25rem;
  min-height: 0;
  margin: 0;
  flex: none;
  border: 1.5px solid var(--input-border);
  background-color: var(--input-bg);
  cursor: pointer;
  display: inline-grid;
  place-content: center;
  transition:
    border-color var(--dur-fast) var(--ease-out),
    background-color var(--dur-fast) var(--ease-out);
}
input[type="checkbox"] {
  border-radius: var(--r-xs);
}
input[type="radio"] {
  border-radius: var(--r-full);
}
input[type="checkbox"]:hover,
input[type="radio"]:hover {
  border-color: var(--accent);
}
input[type="checkbox"]::before {
  content: "";
  width: 0.7rem;
  height: 0.7rem;
  transform: scale(0);
  transition: transform var(--dur-fast) var(--ease-spring);
  background-color: var(--on-accent);
  clip-path: polygon(14% 44%, 0 65%, 40% 100%, 100% 16%, 84% 0, 38% 70%);
}
input[type="radio"]::before {
  content: "";
  width: 0.65rem;
  height: 0.65rem;
  border-radius: var(--r-full);
  transform: scale(0);
  transition: transform var(--dur-fast) var(--ease-spring);
  background-color: var(--on-accent);
}
input[type="checkbox"]:checked,
input[type="radio"]:checked {
  background-color: var(--accent);
  border-color: var(--accent);
}
html[data-theme="dark"] input[type="checkbox"]:checked::before,
html[data-theme="dark"] input[type="radio"]:checked::before {
  background-color: var(--on-glow); /* RULE b: deep-space on glow */
}
input[type="checkbox"]:checked::before,
input[type="radio"]:checked::before {
  transform: scale(1);
}
input[type="checkbox"]:focus-visible,
input[type="radio"]:focus-visible {
  box-shadow: var(--focus-ring);
}
input[type="checkbox"]:disabled,
input[type="radio"]:disabled {
  cursor: not-allowed;
  opacity: 0.5;
}

/* — Toggle / switch — */
.toggle {
  --_tg-w: 44px;
  --_tg-h: 26px;
  position: relative;
  display: inline-block;
  width: var(--_tg-w);
  height: var(--_tg-h);
  flex: none;
}
.toggle input {
  position: absolute;
  opacity: 0;
  width: 100%;
  height: 100%;
  margin: 0;
  cursor: pointer;
}
.toggle .track {
  position: absolute;
  inset: 0;
  background-color: var(--border-ui);
  border-radius: var(--r-full);
  transition: background-color var(--dur-base) var(--ease-out);
}
.toggle .thumb {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 20px;
  height: 20px;
  background-color: var(--surface);
  border-radius: var(--r-full);
  box-shadow: var(--shadow-sm);
  transition: transform var(--dur-base) var(--ease-spring);
}
.toggle input:checked ~ .track {
  background-color: var(--accent);
}
.toggle input:checked ~ .thumb {
  transform: translateX(18px);
}
.toggle input:focus-visible ~ .track {
  box-shadow: var(--focus-ring);
}
.toggle input:disabled ~ .track {
  opacity: 0.5;
}

/* ---------------------------------------------------------- *
 * 6. Cards
 * ---------------------------------------------------------- */
.card {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg); /* NOT pill (RULE c) */
  padding: var(--s-5);
  box-shadow: var(--shadow-sm);
}
.card--interactive,
a.card,
.card--hoverable {
  cursor: pointer;
  transition:
    box-shadow var(--dur-base) var(--ease-out),
    border-color var(--dur-fast) var(--ease-out),
    transform var(--dur-fast) var(--ease-out);
  text-decoration: none;
  color: inherit;
  display: block;
}
.card--interactive:hover,
a.card:hover,
.card--hoverable:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--border-strong, var(--eo-border-strong));
  transform: translateY(-2px);
}
.card--interactive:focus-visible,
a.card:focus-visible {
  box-shadow: var(--focus-ring);
  outline: none;
}
.card--selected,
.card[aria-selected="true"] {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent);
}

/* ---------------------------------------------------------- *
 * 7. Badges  (status + trust)
 * ---------------------------------------------------------- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--s-1);
  padding: 2px var(--s-2);
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: var(--weight-semi);
  line-height: 1.4;
  border-radius: var(--r-xs);
  background-color: var(--surface-2);
  color: var(--muted);
  border: 1px solid var(--border);
}
.badge svg {
  width: 0.9em;
  height: 0.9em;
}
/* Trust badge — "you own it" ownership marker */
.badge--trust {
  background-color: var(--eo-aurora-tint);
  color: var(--accent-text);
  border-color: color-mix(in srgb, var(--accent) 35%, transparent);
}
html[data-theme="dark"] .badge--trust {
  background-color: color-mix(in srgb, var(--accent) 16%, transparent);
  color: var(--accent);
}
/* Status badges — icon + text, never colour alone (RULE d) */
.badge--success {
  background-color: var(--eo-success-bg);
  color: var(--eo-success);
  border-color: color-mix(in srgb, var(--eo-success) 30%, transparent);
}
.badge--warning {
  background-color: var(--eo-warning-bg);
  color: var(--eo-warning);
  border-color: color-mix(in srgb, var(--eo-warning) 30%, transparent);
}
.badge--error {
  background-color: var(--eo-error-bg);
  color: var(--eo-error);
  border-color: color-mix(in srgb, var(--eo-error) 30%, transparent);
}
.badge--info {
  background-color: var(--eo-info-bg);
  color: var(--eo-info);
  border-color: color-mix(in srgb, var(--eo-info) 30%, transparent);
}
html[data-theme="dark"] .badge--success {
  background-color: color-mix(in srgb, var(--eo-success-d) 14%, transparent);
  color: var(--eo-success-d);
}
html[data-theme="dark"] .badge--warning {
  background-color: color-mix(in srgb, var(--eo-warning-d) 14%, transparent);
  color: var(--eo-warning-d);
}
html[data-theme="dark"] .badge--error {
  background-color: color-mix(in srgb, var(--eo-error-d) 14%, transparent);
  color: var(--eo-error-d);
}
html[data-theme="dark"] .badge--info {
  background-color: color-mix(in srgb, var(--eo-info-d) 14%, transparent);
  color: var(--eo-info-d);
}

/* ---------------------------------------------------------- *
 * 8. Alerts  (icon + text, role="alert"/"status")
 * ---------------------------------------------------------- */
.alert {
  display: flex;
  align-items: flex-start;
  gap: var(--s-3);
  padding: var(--s-4);
  border-radius: var(--r-md);
  border: 1px solid var(--border);
  border-left-width: 4px;
  background-color: var(--surface);
  font-size: var(--text-sm);
  color: var(--fg);
}
.alert .alert-icon {
  flex: none;
  width: 1.25rem;
  height: 1.25rem;
  margin-top: 1px;
}
.alert .alert-icon::before {
  font-size: 1.1rem;
  line-height: 1;
}
.alert .alert-title {
  font-weight: var(--weight-semi);
}
.alert--info {
  border-left-color: var(--eo-info);
  background-color: var(--eo-info-bg);
}
.alert--info .alert-icon::before {
  content: "ℹ";
  color: var(--eo-info);
}
.alert--success {
  border-left-color: var(--eo-success);
  background-color: var(--eo-success-bg);
}
.alert--success .alert-icon::before {
  content: "✓";
  color: var(--eo-success);
}
.alert--warning {
  border-left-color: var(--eo-warning);
  background-color: var(--eo-warning-bg);
}
.alert--warning .alert-icon::before {
  content: "⚠";
  color: var(--eo-warning);
}
.alert--error {
  border-left-color: var(--eo-error);
  background-color: var(--eo-error-bg);
}
.alert--error .alert-icon::before {
  content: "⚠";
  color: var(--eo-error);
}
/* Dark mode alerts: keep tinted fills subtle, text legible */
html[data-theme="dark"] .alert--info,
html[data-theme="dark"] .alert--success,
html[data-theme="dark"] .alert--warning,
html[data-theme="dark"] .alert--error {
  background-color: var(--surface-2);
  color: var(--fg);
}
html[data-theme="dark"] .alert--info .alert-icon::before {
  color: var(--eo-info-d);
}
html[data-theme="dark"] .alert--success .alert-icon::before {
  color: var(--eo-success-d);
}
html[data-theme="dark"] .alert--warning .alert-icon::before {
  color: var(--eo-warning-d);
}
html[data-theme="dark"] .alert--error .alert-icon::before {
  color: var(--eo-error-d);
}

/* ---------------------------------------------------------- *
 * 9. Table base
 * ---------------------------------------------------------- */
table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
}
caption {
  text-align: left;
  font-weight: var(--weight-semi);
  color: var(--muted);
  padding-bottom: var(--s-2);
}
th,
td {
  text-align: left;
  padding: var(--s-3) var(--s-4);
  border-bottom: 1px solid var(--border); /* functional border */
  vertical-align: top;
}
thead th {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: var(--weight-bold);
  letter-spacing: var(--track-label);
  text-transform: uppercase;
  color: var(--muted);
  border-bottom: 2px solid var(--border-ui);
}
/* zebra via surface-2 */
tbody tr:nth-child(even) {
  background-color: var(--surface-2);
}
tbody tr:hover {
  background-color: color-mix(in srgb, var(--accent) 6%, transparent);
}
/* numeric columns: right-aligned + tabular figures */
td.num,
th.num,
.table-num {
  text-align: right;
  font-feature-settings: "tnum", "lnum";
  font-variant-numeric: tabular-nums lining-nums;
}

/* ---------------------------------------------------------- *
 * 10. Mobile nav scaffold (hamburger / drawer)
 *     Markup contract:
 *       <button class="nav-toggle" aria-expanded="false"
 *               aria-controls="nav-drawer">…</button>
 *       <nav id="nav-drawer" class="nav-drawer">…</nav>
 *       <div class="nav-scrim" data-nav-scrim></div>
 *     Toggle .is-open on .nav-drawer + .nav-scrim and flip
 *     aria-expanded in JS.
 * ---------------------------------------------------------- */
.nav-toggle {
  display: none; /* shown < lg via media query below */
  align-items: center;
  justify-content: center;
  width: var(--control-h-md);
  height: var(--control-h-md);
  background: transparent;
  border: 1.5px solid var(--border-ui);
  border-radius: var(--r-sm);
  color: var(--fg);
  cursor: pointer;
  touch-action: manipulation;
}
.nav-toggle:focus-visible {
  box-shadow: var(--focus-ring);
}
.nav-toggle .bars,
.nav-toggle .bars::before,
.nav-toggle .bars::after {
  content: "";
  display: block;
  width: 20px;
  height: 2px;
  background-color: currentColor;
  border-radius: var(--r-full);
  transition:
    transform var(--dur-fast) var(--ease-out),
    opacity var(--dur-fast) var(--ease-out);
}
.nav-toggle .bars::before {
  transform: translateY(-6px);
}
.nav-toggle .bars::after {
  transform: translateY(4px); /* offset for the middle bar height */
}
.nav-toggle[aria-expanded="true"] .bars {
  background-color: transparent;
}
.nav-toggle[aria-expanded="true"] .bars::before {
  transform: translateY(0) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .bars::after {
  transform: translateY(-2px) rotate(-45deg);
}

.nav-scrim {
  position: fixed;
  inset: 0;
  background-color: color-mix(in srgb, var(--eo-deep-space) 55%, transparent);
  opacity: 0;
  visibility: hidden;
  z-index: var(--z-overlay);
  transition:
    opacity var(--dur-base) var(--ease-out),
    visibility var(--dur-base) var(--ease-out);
}
.nav-scrim.is-open {
  opacity: 1;
  visibility: visible;
}

.nav-drawer {
  /* desktop: inline horizontal nav by default */
  display: flex;
  align-items: center;
  gap: var(--s-5);
}

@media (max-width: 899.98px) {
  /* < --bp-lg (900px): collapse to hamburger + slide-in drawer */
  .nav-toggle {
    display: inline-flex;
  }
  .nav-drawer {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: min(82vw, 360px);
    flex-direction: column;
    align-items: stretch;
    gap: var(--s-2);
    padding: var(--s-7) var(--s-5);
    background-color: var(--surface);
    border-left: 1px solid var(--border);
    box-shadow: var(--shadow-lg);
    transform: translateX(100%);
    visibility: hidden;
    z-index: var(--z-modal);
    overflow-y: auto;
    transition:
      transform var(--dur-base) var(--ease-out),
      visibility var(--dur-base) var(--ease-out);
  }
  .nav-drawer.is-open {
    transform: translateX(0);
    visibility: visible;
  }
}