*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0; font-family: var(--font); font-size: 1rem; line-height: 1.6;
  background: var(--color-bg); color: var(--color-text);
}
img, svg { max-width: 100%; }
h1, h2, h3 { line-height: 1.2; letter-spacing: -0.02em; margin: 0; }
p { margin: 0; }
a { color: var(--color-link); text-underline-offset: 3px; }
:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 2px; }
[hidden] { display: none !important; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip-link { position: absolute; left: 1rem; top: -4rem; background: var(--color-surface); padding: .6rem 1rem; border-radius: var(--radius); z-index: 100; }
.skip-link:focus { top: 1rem; }
.icon { width: 1.25rem; height: 1.25rem; stroke: currentColor; fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; flex: none; }
.container { width: min(72rem, 100% - 2rem); margin-inline: auto; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
  min-height: 2.75rem; min-width: 2.75rem; padding: 0 1.1rem; border-radius: var(--radius);
  font: inherit; font-weight: 600; text-decoration: none; cursor: pointer;
  border: 1px solid var(--color-border); background: var(--color-surface); color: var(--color-text);
  transition: background .15s, border-color .15s;
}
.btn:hover { background: var(--color-surface-secondary); }
.btn-primary { background: var(--color-primary); border-color: var(--color-primary); color: var(--color-primary-contrast); }
.btn-primary:hover { background: var(--color-primary-hover); border-color: var(--color-primary-hover); }
.btn-primary:active { background: var(--color-primary-pressed); }
.btn-lg { min-height: 3rem; padding: 0 1.4rem; }
.btn-icon { padding: 0; width: 2.75rem; }

.icon-chrome { width: 1.4rem; height: 1.4rem; flex: none; }

/* Header */
.site-header { border-bottom: 1px solid var(--color-border); background: var(--color-bg); position: sticky; top: 0; z-index: 20; }
.site-header .container { display: flex; align-items: center; gap: .75rem; min-height: 4rem; }
.brand { display: inline-flex; align-items: center; gap: .6rem; font-weight: 700; font-size: 1.05rem; color: var(--color-text); text-decoration: none; margin-right: auto; }
.brand img { width: 32px; height: 32px; border-radius: 8px; }
.site-nav { display: flex; gap: .25rem; }
.site-nav a { color: var(--color-text-secondary); text-decoration: none; padding: 0 .8rem; border-radius: var(--radius); font-weight: 500; min-height: 2.75rem; display: inline-flex; align-items: center; }
.site-nav a:hover { color: var(--color-text); background: var(--color-surface-secondary); }
.theme-toggle .icon-sun { display: none; }
:root[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
:root[data-theme="dark"] .theme-toggle .icon-moon { display: none; }
@media (max-width: 40rem) {
  .site-nav { display: none; }
  .header-cta span { display: none; }
  .header-cta { width: 2.75rem; padding: 0; }
}

/* Hero */
.hero { padding: 4rem 0 3rem; text-align: center; }
/* One line at every width: no wrapping, and the size follows the viewport so the whole line
   (about 13 characters wide per 6vw) always fits inside the page gutters. */
.hero h1 { font-size: clamp(1.45rem, 6.6vw, 3.5rem); white-space: nowrap; margin-inline: auto; }
.hero .lead { margin: 1.25rem auto 0; max-width: 40rem; color: var(--color-text-secondary); font-size: clamp(1.05rem, 2.2vw, 1.2rem); }
.hero-note { margin-top: 1.25rem; color: var(--color-text-muted); font-size: .92rem; }

/* Search tool */
.search-card {
  margin: 2.25rem auto 0; max-width: 44rem; text-align: left;
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: calc(var(--radius) + 6px); box-shadow: var(--shadow-md); padding: 1rem;
}
.search-form { display: flex; gap: .6rem; }
.search-field { position: relative; flex: 1; min-width: 0; }
.search-field input {
  width: 100%; min-height: 3.25rem; padding: 0 2.9rem 0 1rem; font: inherit; font-size: 1.1rem; font-weight: 500;
  color: var(--color-text); background: var(--color-bg); border: 1px solid var(--color-border); border-radius: var(--radius);
}
.search-field input::placeholder { color: var(--color-text-muted); font-weight: 400; }
.search-field input:focus { outline: none; border-color: var(--color-primary); box-shadow: var(--focus-ring); }
.clear-btn {
  position: absolute; right: .25rem; top: 50%; transform: translateY(-50%); width: 2.75rem; height: 2.75rem;
  display: inline-flex; align-items: center; justify-content: center; border: 0; background: none;
  color: var(--color-text-muted); border-radius: var(--radius); cursor: pointer;
}
.clear-btn:hover { color: var(--color-text); }
.clear-btn[hidden] { display: none; }
.search-form .btn-primary { min-height: 3.25rem; padding: 0 1.4rem; }
@media (max-width: 30rem) {
  .search-form .btn-primary span { display: none; }
  .search-form .btn-primary { width: 3.25rem; padding: 0; }
}

.results { margin-top: 1rem; min-height: 6.5rem; }
.result-state { padding: .75rem .25rem .25rem; }
.result-title { font-size: .85rem; font-weight: 600; text-transform: uppercase; letter-spacing: .06em; color: var(--color-text-muted); margin-bottom: .6rem; }
.result-title strong { color: var(--color-text); text-transform: none; letter-spacing: 0; font-size: 1rem; }
.chip-list { list-style: none; margin: 0 0 1.1rem; padding: 0; display: flex; flex-wrap: wrap; gap: .5rem; }
.chip {
  display: inline-grid; min-height: 2.75rem; padding: 0 .95rem; align-items: center; font: inherit; font-size: 1rem;
  color: var(--color-text); background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius); cursor: pointer;
}
.chip > span { grid-area: 1 / 1; text-align: center; }
.chip .chip-copied { visibility: hidden; }
.chip[data-copied="true"] { background: var(--color-success-bg); color: var(--color-success-text); border-color: transparent; }
.chip[data-copied="true"] .chip-word { visibility: hidden; }
.chip[data-copied="true"] .chip-copied { visibility: visible; }
.chip:hover { background: var(--color-accent-surface); border-color: var(--color-primary); }
.chip-related { font-size: .95rem; color: var(--color-text-secondary); }
.result-hint { font-size: .85rem; color: var(--color-text-muted); }
.message { display: flex; gap: .75rem; align-items: flex-start; padding: .9rem 1rem; border-radius: var(--radius); background: var(--color-surface-secondary); color: var(--color-text-secondary); }
.message.error { background: var(--color-error-bg); color: var(--color-error-text); }
.message .icon { margin-top: .2rem; }
.suggestions { display: flex; flex-wrap: wrap; gap: .5rem; align-items: center; margin-top: .9rem; }
.suggestions .label { color: var(--color-text-muted); font-size: .9rem; margin-right: .25rem; }
.loading { display: flex; align-items: center; gap: .75rem; padding: 1.5rem .25rem; color: var(--color-text-secondary); }
.spinner { width: 1.25rem; height: 1.25rem; border: 2px solid var(--color-border); border-top-color: var(--color-primary); border-radius: 50%; animation: spin .8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.attribution { margin-top: .75rem; padding-top: .75rem; border-top: 1px solid var(--color-border); font-size: .8rem; color: var(--color-text-muted); }

/* Sections */
section.block { padding: 4rem 0; }
section.block.alt { background: var(--color-surface); border-block: 1px solid var(--color-border); }
.block h2 { font-size: clamp(1.6rem, 3.5vw, 2.1rem); margin-bottom: 1rem; }
.block p + p { margin-top: 1rem; }
.block p { color: var(--color-text-secondary); font-size: 1.05rem; }
.two-col { display: grid; gap: 2.5rem; grid-template-columns: 1fr; align-items: center; }
@media (min-width: 56rem) { .two-col { grid-template-columns: 1fr 1fr; } }
.shot { border: 1px solid var(--color-border); border-radius: calc(var(--radius) + 4px); box-shadow: var(--shadow-md); overflow: hidden; background: var(--color-surface); }
.shot img { display: block; width: 100%; height: auto; }
.steps { list-style: none; margin: 1.5rem 0 0; padding: 0; display: grid; gap: 1rem; counter-reset: step; }
.steps li { display: grid; grid-template-columns: 2.5rem 1fr; gap: 1rem; align-items: start; }
.steps li::before { counter-increment: step; content: counter(step); width: 2.5rem; height: 2.5rem; display: grid; place-items: center; border-radius: 50%; background: var(--color-accent-surface); color: var(--color-link); font-weight: 700; }
.steps h3 { font-size: 1.1rem; margin-bottom: .15rem; }
.steps p { font-size: 1rem; }
.audience { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr)); margin-top: 1.5rem; }
.audience article { border: 1px solid var(--color-border); border-radius: var(--radius); padding: 1.1rem 1.2rem; background: var(--color-surface); }
.audience h3 { font-size: 1.05rem; margin-bottom: .3rem; }
.audience p { font-size: .98rem; }

/* FAQ */
.faq { margin-top: 1.5rem; max-width: 48rem; }
.faq details { border-bottom: 1px solid var(--color-border); }
.faq summary { cursor: pointer; list-style: none; padding: .9rem 0; font-weight: 600; font-size: 1.05rem; display: flex; justify-content: space-between; align-items: center; gap: 1rem; min-height: 2.75rem; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font-size: 1.4rem; line-height: 1; color: var(--color-text-muted); }
.faq details[open] summary::after { content: "\2212"; }
.faq details p { padding: 0 0 1.1rem; }
.cta-band { text-align: center; }
.cta-band p { margin: 0 auto 1.5rem; max-width: 34rem; }

.site-footer { border-top: 1px solid var(--color-border); padding: 2rem 0; color: var(--color-text-muted); font-size: .9rem; }
.site-footer .container { display: flex; flex-wrap: wrap; gap: .75rem 2rem; justify-content: space-between; }
.site-footer a { color: var(--color-text-secondary); }