/* =============================================================
   theme.css — SkillMe shared design system
   White / black / grey canvas · red actions · orange highlights
   Fonts: Geist (UI) + Geist Mono (numbers, labels, codes)

   Theme is set on <html data-theme="light|dark"> by the inline
   bootstrap snippet in each page <head>; theme.js wires the toggle.
   Every page links this file first, then its own page styles.
   ============================================================= */

/* ── Tokens: light (default) ─────────────────────────────────── */
:root,
[data-theme="light"] {
  color-scheme: light;

  --bg:          #ffffff;
  --bg-soft:     #fafafa;   /* alternating sections */
  --surface:     #ffffff;   /* cards */
  --surface-2:   #f6f6f7;   /* inset blocks, inputs-on-card */
  --surface-3:   #efeff1;   /* hover */
  --line:        #e7e7ea;
  --line-strong: #d4d4d8;

  --text:   #0a0a0a;
  --text-2: #52525b;        /* body secondary */
  --text-3: #6b6b74;        /* captions, meta — 5.3:1 on white */
  --invert:    #0a0a0a;     /* black blocks in light mode */
  --invert-fg: #ffffff;

  /* Red = actions (buttons, primary links) */
  --primary:        #d42a25;  /* white text 5.05:1 */
  --primary-hover:  #bd221e;
  --primary-press:  #b01e1a;
  --primary-fg:     #ffffff;
  --primary-wash:   rgba(229, 50, 45, 0.08);
  --primary-line:   rgba(229, 50, 45, 0.30);

  /* Orange = highlights (eyebrows, badges, progress, icons) */
  --accent:       #f26a1b;
  --accent-text:  #c2500d;  /* AA on white */
  --accent-wash:  rgba(242, 106, 27, 0.09);
  --accent-line:  rgba(242, 106, 27, 0.32);

  --ok:     #15803d;  --ok-wash:     rgba(21, 128, 61, 0.09);  --ok-line:     rgba(21, 128, 61, 0.28);
  --warn:   #b45309;  --warn-wash:   rgba(217, 119, 6, 0.10);  --warn-line:   rgba(217, 119, 6, 0.30);
  --danger: #c81e1e;  --danger-wash: rgba(220, 38, 38, 0.08);  --danger-line: rgba(220, 38, 38, 0.28);
  --info:   #1d4ed8;  --info-wash:   rgba(37, 99, 235, 0.08);  --info-line:   rgba(37, 99, 235, 0.25);

  --shadow-xs: 0 1px 2px rgba(10, 10, 10, 0.04);
  --shadow-sm: 0 1px 2px rgba(10, 10, 10, 0.04), 0 2px 8px -2px rgba(10, 10, 10, 0.06);
  --shadow-md: 0 1px 2px rgba(10, 10, 10, 0.04), 0 12px 32px -12px rgba(10, 10, 10, 0.16);
  --shadow-lg: 0 30px 70px -24px rgba(10, 10, 10, 0.28);
  --ring: 0 0 0 4px rgba(212, 42, 37, 0.28);

  --nav-bg: rgba(255, 255, 255, 0.82);
  --overlay: rgba(10, 10, 10, 0.45);
  --grid-dot: rgba(10, 10, 10, 0.07);
}

/* ── Tokens: dark ────────────────────────────────────────────── */
[data-theme="dark"] {
  color-scheme: dark;

  --bg:          #09090a;
  --bg-soft:     #0d0d0f;
  --surface:     #121214;
  --surface-2:   #18181b;
  --surface-3:   #1f1f23;
  --line:        rgba(255, 255, 255, 0.08);
  --line-strong: rgba(255, 255, 255, 0.15);

  --text:   #fafafa;
  --text-2: #a1a1aa;
  --text-3: #8a8a93;  /* 5.8:1 on the dark background */
  --invert:    #fafafa;
  --invert-fg: #0a0a0a;

  --primary:        #ef3e36;
  --primary-hover:  #ff5148;
  --primary-press:  #d8322b;
  --primary-fg:     #ffffff;
  --primary-wash:   rgba(239, 62, 54, 0.14);
  --primary-line:   rgba(239, 62, 54, 0.40);

  --accent:       #ff7a2f;
  --accent-text:  #ff8f4f;
  --accent-wash:  rgba(255, 122, 47, 0.12);
  --accent-line:  rgba(255, 122, 47, 0.36);

  --ok:     #4ade80;  --ok-wash:     rgba(74, 222, 128, 0.12);  --ok-line:     rgba(74, 222, 128, 0.30);
  --warn:   #fbbf24;  --warn-wash:   rgba(251, 191, 36, 0.12);  --warn-line:   rgba(251, 191, 36, 0.30);
  --danger: #f87171;  --danger-wash: rgba(248, 113, 113, 0.12); --danger-line: rgba(248, 113, 113, 0.32);
  --info:   #7ab0ff;  --info-wash:   rgba(122, 176, 255, 0.12); --info-line:   rgba(122, 176, 255, 0.30);

  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4), 0 2px 8px -2px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 1px 2px rgba(0, 0, 0, 0.4), 0 14px 34px -12px rgba(0, 0, 0, 0.6);
  --shadow-lg: 0 30px 80px -24px rgba(0, 0, 0, 0.8);

  --nav-bg: rgba(9, 9, 10, 0.78);
  --overlay: rgba(0, 0, 0, 0.62);
  --grid-dot: rgba(255, 255, 255, 0.06);
}

/* ── Shared scales ───────────────────────────────────────────── */
:root {
  --font-sans: 'Geist', ui-sans-serif, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'Geist Mono', ui-monospace, 'SFMono-Regular', Menlo, Consolas, monospace;

  --r-xs: 6px;
  --r-sm: 8px;
  --r-md: 12px;
  --r-lg: 16px;
  --r-xl: 22px;
  --r-full: 999px;

  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --container: 1160px;
  --gutter: 24px;
  --nav-h: 64px;
}

/* ── Base ────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  background: var(--bg);
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 16px);
}
body {
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  font-feature-settings: 'ss01', 'cv11';
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
img, svg, video { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; }
ul[role="list"], ol[role="list"] { list-style: none; }
::selection { background: var(--accent-wash); color: var(--text); }
:focus-visible { outline: 2px solid var(--primary); outline-offset: 3px; border-radius: 6px; }
[hidden] { display: none !important; }

/* Only while switching theme: smooth colour change everywhere */
html.theme-switching *, html.theme-switching *::before, html.theme-switching *::after {
  transition: background-color 0.3s ease, border-color 0.3s ease, color 0.2s ease, fill 0.2s ease, stroke 0.2s ease !important;
}

/* ── Typography ──────────────────────────────────────────────── */
.display, .h1, .h2, .h3, h1, h2, h3, h4 {
  font-family: var(--font-sans);
  color: var(--text);
  letter-spacing: -0.035em;
  line-height: 1.08;
  font-weight: 700;
}
.display { font-size: clamp(2.6rem, 6.2vw, 4.75rem); letter-spacing: -0.05em; line-height: 1.02; font-weight: 700; }
.h1 { font-size: clamp(2.1rem, 4.6vw, 3.4rem); }
.h2 { font-size: clamp(1.7rem, 3.4vw, 2.5rem); }
.h3 { font-size: clamp(1.15rem, 2vw, 1.35rem); letter-spacing: -0.02em; line-height: 1.25; font-weight: 600; }
.lead { font-size: clamp(1.02rem, 1.6vw, 1.18rem); line-height: 1.6; color: var(--text-2); }
.muted { color: var(--text-2); }
.subtle { color: var(--text-3); }
.mono { font-family: var(--font-mono); font-feature-settings: normal; letter-spacing: 0; }
.text-accent { color: var(--accent-text); }
.text-primary { color: var(--primary); }

/* Eyebrow: small mono label in orange */
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.74rem; font-weight: 500;
  letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--accent-text);
}
.eyebrow::before {
  content: '';
  width: 6px; height: 6px; border-radius: 2px;
  background: var(--accent);
}
.eyebrow.no-dot::before { display: none; }

/* ── Layout ──────────────────────────────────────────────────── */
.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 var(--gutter); }
.container-sm { max-width: 760px; }
.container-md { max-width: 960px; }
.section { padding: clamp(64px, 9vw, 112px) 0; }
.section-soft { background: var(--bg-soft); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section-head { max-width: 680px; margin-bottom: clamp(32px, 5vw, 52px); }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-head .eyebrow { margin-bottom: 14px; }
.section-head .lead { margin-top: 14px; }
.stack { display: flex; flex-direction: column; }
.row { display: flex; align-items: center; }
.gap-1 { gap: 8px; } .gap-2 { gap: 12px; } .gap-3 { gap: 16px; } .gap-4 { gap: 24px; }
.wrap { flex-wrap: wrap; }
.grid { display: grid; gap: 16px; }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
@media (max-width: 960px) { .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); } .grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 640px) { .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; } :root { --gutter: 18px; } }

/* Background texture for hero areas */
.bg-grid {
  background-image: radial-gradient(var(--grid-dot) 1px, transparent 1px);
  background-size: 22px 22px;
}

/* ── Navigation ──────────────────────────────────────────────── */
.site-nav {
  position: sticky; top: 0; z-index: 100;
  height: var(--nav-h);
  background: var(--nav-bg);
  backdrop-filter: saturate(180%) blur(16px);
  -webkit-backdrop-filter: saturate(180%) blur(16px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.25s ease, background-color 0.25s ease;
}
.site-nav.is-scrolled, .site-nav.is-solid { border-bottom-color: var(--line); }
.site-nav .container { height: 100%; display: flex; align-items: center; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.08rem; letter-spacing: -0.03em; color: var(--text); flex-shrink: 0; }
.brand img { width: 32px; height: 32px; border-radius: 50%; object-fit: cover; }
.brand-tag { margin-left: 2px; padding-left: 12px; border-left: 1px solid var(--line-strong); font-size: 0.82rem; font-weight: 500; letter-spacing: 0; color: var(--text-2); }
.nav-links { display: flex; align-items: center; gap: 2px; margin: 0 auto; }
.nav-links a {
  padding: 8px 12px;
  border-radius: var(--r-sm);
  font-size: 0.9rem; font-weight: 500;
  color: var(--text-2);
  transition: color 0.15s, background-color 0.15s;
}
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--text); background: var(--surface-2); }
.nav-actions { display: flex; align-items: center; gap: 8px; margin-left: auto; }
@media (min-width: 881px) { .nav-links + .nav-actions { margin-left: 0; } }

.icon-btn, .theme-toggle, .nav-menu-btn {
  width: 38px; height: 38px; flex-shrink: 0;
  display: inline-grid; place-items: center;
  border-radius: var(--r-full);
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--text-2);
  transition: color 0.15s, background-color 0.15s, border-color 0.15s, transform 0.2s var(--ease);
}
.icon-btn:hover, .theme-toggle:hover, .nav-menu-btn:hover { color: var(--text); border-color: var(--line-strong); background: var(--surface-2); }
.icon-btn:active, .theme-toggle:active, .nav-menu-btn:active { transform: scale(0.94); }
[data-theme="dark"] .ti-moon, [data-theme="light"] .ti-sun { display: none; }
.nav-menu-btn { display: none; }

/* Mobile drawer */
.nav-drawer {
  position: fixed; inset: var(--nav-h) 0 auto 0; z-index: 99;
  padding: 12px var(--gutter) 20px;
  background: var(--bg);
  border-bottom: 1px solid var(--line);
  box-shadow: var(--shadow-md);
  transform: translateY(-8px); opacity: 0; visibility: hidden;
  transition: transform 0.25s var(--ease), opacity 0.2s ease, visibility 0.2s;
}
.nav-drawer.is-open { transform: none; opacity: 1; visibility: visible; }
.nav-drawer a:not(.btn) { display: block; padding: 12px 4px; border-bottom: 1px solid var(--line); font-weight: 500; color: var(--text); }
.nav-drawer .btn { width: 100%; margin-top: 14px; }
@media (max-width: 880px) {
  .nav-links { display: none; }
  .nav-menu-btn { display: inline-grid; }
  .nav-actions .nav-hide-sm { display: none; }
}
@media (min-width: 881px) { .nav-drawer { display: none; } }

/* ── Buttons ─────────────────────────────────────────────────── */
.btn {
  position: relative;
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: 42px; padding: 0 18px;
  border-radius: var(--r-md);
  border: 1px solid transparent;
  font-size: 0.92rem; font-weight: 600; letter-spacing: -0.01em;
  white-space: nowrap;
  user-select: none;
  transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease, box-shadow 0.2s ease, transform 0.15s var(--ease);
}
.btn:active { transform: translateY(1px); }
.btn:disabled, .btn[aria-disabled="true"] { opacity: 0.55; cursor: not-allowed; transform: none; }
.btn svg { flex-shrink: 0; }
.btn-sm { height: 34px; padding: 0 12px; font-size: 0.84rem; border-radius: var(--r-sm); }
.btn-lg { height: 52px; padding: 0 24px; font-size: 1rem; border-radius: 14px; }
.btn-block { width: 100%; }

.btn-primary {
  background: var(--primary);
  color: var(--primary-fg);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.18) inset, 0 1px 2px rgba(0, 0, 0, 0.12), 0 8px 20px -10px rgba(229, 50, 45, 0.7);
}
.btn-primary:hover { background: var(--primary-hover); }
.btn-primary:active { background: var(--primary-press); }
.btn-primary:focus-visible { box-shadow: var(--ring); }

.btn-dark { background: var(--invert); color: var(--invert-fg); }
.btn-dark:hover { opacity: 0.88; }

.btn-secondary { background: var(--surface); color: var(--text); border-color: var(--line-strong); box-shadow: var(--shadow-xs); }
.btn-secondary:hover { background: var(--surface-2); border-color: var(--text-3); }

.btn-ghost { background: transparent; color: var(--text-2); }
.btn-ghost:hover { background: var(--surface-2); color: var(--text); }

.btn-link { height: auto; padding: 0; border: 0; background: none; color: var(--primary); font-weight: 600; }
.btn-link:hover { text-decoration: underline; text-underline-offset: 3px; }

.btn .spinner {
  width: 16px; height: 16px; border-radius: 50%;
  border: 2px solid currentColor; border-right-color: transparent;
  animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Badges, chips ───────────────────────────────────────────── */
.badge {
  display: inline-flex; align-items: center; gap: 6px;
  height: 26px; padding: 0 10px;
  border-radius: var(--r-full);
  border: 1px solid var(--line);
  background: var(--surface-2);
  font-size: 0.76rem; font-weight: 600;
  color: var(--text-2);
  white-space: nowrap;
}
.badge-accent  { background: var(--accent-wash);  border-color: var(--accent-line);  color: var(--accent-text); }
.badge-primary { background: var(--primary-wash); border-color: var(--primary-line); color: var(--primary); }
.badge-ok      { background: var(--ok-wash);      border-color: var(--ok-line);      color: var(--ok); }
.badge-warn    { background: var(--warn-wash);    border-color: var(--warn-line);    color: var(--warn); }
.badge-danger  { background: var(--danger-wash);  border-color: var(--danger-line);  color: var(--danger); }
.badge .dot { width: 6px; height: 6px; border-radius: 50%; background: currentColor; }
.badge .dot.pulse { animation: dotPulse 2s ease-in-out infinite; }
@keyframes dotPulse { 0%, 100% { box-shadow: 0 0 0 0 currentColor; } 50% { box-shadow: 0 0 0 4px transparent; } }

.chip {
  display: inline-flex; align-items: center; gap: 6px;
  height: 36px; padding: 0 14px;
  border-radius: var(--r-full);
  border: 1px solid var(--line);
  background: var(--surface);
  font-size: 0.86rem; font-weight: 500;
  color: var(--text-2);
  transition: color 0.15s, border-color 0.15s, background-color 0.15s;
}
.chip:hover { color: var(--text); border-color: var(--line-strong); }
.chip.is-active, .chip[aria-pressed="true"], .chip[aria-selected="true"] { background: var(--invert); border-color: var(--invert); color: var(--invert-fg); }

/* ── Cards ───────────────────────────────────────────────────── */
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-xs);
}
.card-pad { padding: 24px; }
.card-hover { transition: border-color 0.2s, box-shadow 0.25s var(--ease), transform 0.25s var(--ease); }
.card-hover:hover { border-color: var(--line-strong); box-shadow: var(--shadow-md); transform: translateY(-2px); }
.card-dark { background: var(--invert); color: var(--invert-fg); border-color: var(--invert); }
.icon-tile {
  width: 40px; height: 40px; flex-shrink: 0;
  display: grid; place-items: center;
  border-radius: 11px;
  background: var(--accent-wash);
  color: var(--accent-text);
}
.divider { height: 1px; background: var(--line); border: 0; }

/* ── Forms ───────────────────────────────────────────────────── */
.field { display: flex; flex-direction: column; gap: 6px; }
.label { font-size: 0.86rem; font-weight: 600; color: var(--text); }
.label .opt { font-weight: 400; color: var(--text-3); }
.label .req { color: var(--primary); }
.help { font-size: 0.8rem; color: var(--text-3); }
.error-text { font-size: 0.8rem; color: var(--danger); }
.input, .select, .textarea {
  width: 100%;
  height: 46px;
  padding: 0 14px;
  border-radius: var(--r-md);
  border: 1px solid var(--line-strong);
  background: var(--surface);
  color: var(--text);
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.textarea { height: auto; min-height: 110px; padding: 12px 14px; resize: vertical; line-height: 1.5; }
.select {
  appearance: none; -webkit-appearance: none;
  padding-right: 40px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='none' stroke='%238b8b94' stroke-width='2' viewBox='0 0 24 24'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 14px center;
}
.input::placeholder, .textarea::placeholder { color: var(--text-3); }
.input:hover, .select:hover, .textarea:hover { border-color: var(--text-3); }
.input:focus, .select:focus, .textarea:focus { border-color: var(--primary); box-shadow: var(--ring); }
.input[aria-invalid="true"], .select[aria-invalid="true"], .textarea[aria-invalid="true"] { border-color: var(--danger); }
.input:disabled, .select:disabled { background: var(--surface-2); color: var(--text-3); cursor: not-allowed; }
.check { display: flex; align-items: flex-start; gap: 10px; font-size: 0.9rem; color: var(--text-2); cursor: pointer; }
.check input { width: 18px; height: 18px; margin-top: 2px; accent-color: var(--primary); flex-shrink: 0; }
.option-card {
  display: flex; align-items: center; gap: 12px;
  padding: 14px 16px;
  border-radius: var(--r-md);
  border: 1px solid var(--line-strong);
  background: var(--surface);
  cursor: pointer;
  transition: border-color 0.15s, background-color 0.15s, box-shadow 0.15s;
}
.option-card:hover { border-color: var(--text-3); }
.option-card:has(input:checked) { border-color: var(--primary); background: var(--primary-wash); box-shadow: 0 0 0 1px var(--primary); }
.option-card input { accent-color: var(--primary); }

/* Alerts */
.alert { display: flex; gap: 10px; padding: 12px 14px; border-radius: var(--r-md); border: 1px solid var(--line); background: var(--surface-2); font-size: 0.88rem; color: var(--text-2); }
.alert-ok     { background: var(--ok-wash);     border-color: var(--ok-line);     color: var(--ok); }
.alert-warn   { background: var(--warn-wash);   border-color: var(--warn-line);   color: var(--warn); }
.alert-danger { background: var(--danger-wash); border-color: var(--danger-line); color: var(--danger); }
.alert-info   { background: var(--info-wash);   border-color: var(--info-line);   color: var(--info); }

/* ── Accordion (details/summary) ─────────────────────────────── */
.accordion { border-top: 1px solid var(--line); }
.accordion details { border-bottom: 1px solid var(--line); }
.accordion summary {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 20px 2px;
  list-style: none;
  cursor: pointer;
  font-weight: 600; font-size: 1rem; color: var(--text);
}
.accordion summary::-webkit-details-marker { display: none; }
.accordion summary::after {
  content: '+';
  flex-shrink: 0;
  width: 28px; height: 28px;
  display: grid; place-items: center;
  border-radius: 50%;
  border: 1px solid var(--line);
  font-family: var(--font-mono); font-weight: 400; color: var(--text-2);
  transition: transform 0.25s var(--ease), background-color 0.15s;
}
.accordion details[open] summary::after { transform: rotate(45deg); background: var(--surface-2); }
.accordion .acc-body { padding: 0 2px 20px; color: var(--text-2); max-width: 760px; }

/* ── Footer ──────────────────────────────────────────────────── */
.site-footer { border-top: 1px solid var(--line); background: var(--bg); padding: 56px 0 32px; font-size: 0.9rem; }
.footer-grid { display: grid; grid-template-columns: 1.4fr repeat(3, 1fr); gap: 32px; }
.footer-col h4 { font-size: 0.78rem; font-family: var(--font-mono); font-weight: 500; letter-spacing: 0.06em; text-transform: uppercase; color: var(--text-3); margin-bottom: 14px; }
.footer-col a { display: block; padding: 4px 0; color: var(--text-2); }
.footer-col a:hover { color: var(--text); }
.footer-about { color: var(--text-2); max-width: 320px; margin-top: 12px; font-size: 0.88rem; }
.footer-bottom { margin-top: 40px; padding-top: 20px; border-top: 1px solid var(--line); display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; color: var(--text-3); font-size: 0.82rem; }
@media (max-width: 760px) { .footer-grid { grid-template-columns: 1fr 1fr; } .footer-grid > :first-child { grid-column: 1 / -1; } }

/* ── Toast ───────────────────────────────────────────────────── */
.toast {
  position: fixed; left: 50%; bottom: 24px; z-index: 1000;
  display: flex; align-items: center; gap: 10px;
  padding: 12px 16px;
  border-radius: var(--r-md);
  background: var(--invert); color: var(--invert-fg);
  font-size: 0.88rem; font-weight: 500;
  box-shadow: var(--shadow-lg);
  transform: translate(-50%, 140%); opacity: 0;
  transition: transform 0.35s var(--ease), opacity 0.3s ease;
}
.toast.is-visible { transform: translate(-50%, 0); opacity: 1; }

/* ── Motion helpers ──────────────────────────────────────────── */
.reveal { opacity: 0; transform: translateY(14px); transition: opacity 0.7s var(--ease), transform 0.7s var(--ease); }
.reveal.is-in { opacity: 1; transform: none; }
.no-js .reveal { opacity: 1; transform: none; }

/* ── Utilities ───────────────────────────────────────────────── */
.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; }
.skip-link { position: absolute; left: 12px; top: -48px; z-index: 1001; padding: 10px 14px; border-radius: var(--r-sm); background: var(--invert); color: var(--invert-fg); font-weight: 600; }
.skip-link:focus { top: 12px; }
.center { text-align: center; }
.nowrap { white-space: nowrap; }

/* Sections focused by in-page links (tabindex="-1") don't need a ring */
[tabindex="-1"]:focus:not(:focus-visible), section[tabindex="-1"]:focus { outline: none; }

/* Touch screens: 44px targets, and 16px inputs so iOS Safari doesn't zoom on focus */
@media (max-width: 640px) {
  .input, .select, .textarea { font-size: 16px; }
  .btn-sm, .chip { min-height: 44px; }
  .icon-btn, .theme-toggle, .nav-menu-btn { width: 44px; height: 44px; }
  .footer-col a { padding: 10px 0; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
  .reveal { opacity: 1; transform: none; }
}

@media print {
  .site-nav, .nav-drawer, .site-footer, .toast, .theme-toggle { display: none !important; }
  body { background: #fff; color: #000; }
}