/* Slacxify marketing site — shared layout on top of the Modernist design system.
   Colors/type/spacing/radius all come from styles.css tokens; this file adds
   page structure, the sticky nav, and the interactive pieces (chat mock,
   accordion, pricing toggle, reveal-on-scroll). */
:root {
  --leading: 26px;
  --half: 13px;
  --edge: clamp(20px, 5vw, 72px);
  --measure: 62ch;
  --maxw: 1200px;
}
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body { text-wrap: pretty; }
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 var(--edge); }
.rule2 { height: 2px; border: 0; margin: 0; background: var(--color-divider); }

/* — sticky nav — */
.nav-brand {
  display: flex; align-items: center; gap: 9px; text-decoration: none; color: inherit;
}
.nav-brand svg { display: block; flex: none; }
.footer-brand { display: flex; align-items: center; gap: 9px; }
.footer-brand svg { display: block; flex: none; }

.site-nav {
  position: sticky; top: 0; z-index: 50;
  padding-inline: max(var(--edge), calc((100% - var(--maxw)) / 2 + var(--edge)));
  background: color-mix(in srgb, var(--color-bg) 88%, transparent);
  transition: box-shadow .2s ease, border-color .2s ease, backdrop-filter .2s ease;
}
.site-nav.is-scrolled { backdrop-filter: blur(10px); box-shadow: var(--shadow-sm); }
.site-nav a[aria-current='page'] { color: var(--color-accent); }
.nav-links { display: flex; align-items: center; gap: var(--space-4); }

.nav-toggle {
  display: none; flex: none; width: 36px; height: 36px; align-items: center; justify-content: center;
  border: none; background: transparent; cursor: pointer; padding: 0;
}
.nav-toggle .bars { position: relative; width: 20px; height: 2px; background: var(--color-text); }
.nav-toggle .bars::before, .nav-toggle .bars::after { content: ""; position: absolute; left: 0; width: 20px; height: 2px; background: var(--color-text); transition: transform .2s ease, opacity .2s ease; }
.nav-toggle .bars::before { top: -6px; }
.nav-toggle .bars::after { top: 6px; }
.nav-toggle[aria-expanded="true"] .bars { background: transparent; }
.nav-toggle[aria-expanded="true"] .bars::before { top: 0; transform: rotate(45deg); }
.nav-toggle[aria-expanded="true"] .bars::after { top: 0; transform: rotate(-45deg); }
.nav-toggle:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }

.mobile-menu { display: none; flex-direction: column; padding: 0 max(var(--edge), calc((100% - var(--maxw)) / 2 + var(--edge))); background: var(--color-bg); border-bottom: 2px solid var(--color-divider); overflow: hidden; max-height: 0; transition: max-height .25s ease; }
.mobile-menu.is-open { display: flex; max-height: 560px; padding-block: var(--space-3) var(--space-5); }
.mobile-menu a:not(.btn) { color: inherit; text-decoration: none; font-size: 16px; padding: var(--space-2) 0; }
.mobile-menu a:not(.btn):hover { color: var(--color-accent); }
.mobile-menu .btn { align-self: stretch; width: 100%; margin-top: 0; }
.mobile-menu .btn-secondary { margin-top: var(--space-3); }
.mobile-menu .btn + .btn { margin-top: var(--space-2); }
.mobile-menu .lang-select { width: 100%; }

@media (max-width: 640px) {
  .nav-links .nav-only-desktop { display: none; }
  .nav-links .btn-primary { display: none; }
  .nav-toggle { display: inline-flex; }
}

.kicker {
  display: block; font-size: 13px; line-height: var(--half);
  letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--color-accent-700);
  font-feature-settings: "tnum" 1;
  margin: 0 0 calc(var(--leading) - var(--half));
}

/* — reveal on scroll — */
[data-reveal] { opacity: 0; transform: translateY(16px); transition: opacity .6s ease, transform .6s ease; }
[data-reveal].is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { [data-reveal] { opacity: 1; transform: none; transition: none; } }

/* — hero — */
.hero { padding: calc(3.4 * var(--leading)) 0 calc(2.6 * var(--leading)); display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 460px); gap: clamp(32px, 5vw, 80px); align-items: center; }
.display {
  font-family: var(--font-heading); font-weight: var(--font-heading-weight);
  font-size: clamp(38px, 5vw, 64px); line-height: 1.06;
  letter-spacing: -0.02em; margin: 0; margin-left: -0.03em;
}
.hero .sub { font-size: 17.5px; line-height: var(--leading); max-width: var(--measure);
  margin: calc(var(--leading)) 0 0; color: color-mix(in srgb, var(--color-text) 82%, transparent); }
.hero .row { display: flex; gap: var(--space-3); flex-wrap: wrap; margin-top: var(--leading); }
@media (max-width: 880px) { .hero { grid-template-columns: 1fr; } }

/* — chat mock (animated hero visual) — */
.chat-mock {
  background: var(--color-surface); border: 2px solid var(--color-divider);
  padding: var(--space-4); display: flex; flex-direction: column; gap: var(--space-3);
  min-height: 320px;
}
.chat-mock .chat-head { display: flex; align-items: center; justify-content: space-between;
  padding-bottom: var(--space-3); border-bottom: 2px solid var(--color-divider); }
.chat-mock .chat-head span { font-size: 13px; font-weight: 600; }
.chat-mock .chat-lang { font-size: 11px; letter-spacing: .06em; text-transform: uppercase;
  color: color-mix(in srgb, var(--color-text) 60%, transparent); }
.chat-bubble { max-width: 88%; padding: 10px 12px; font-size: 14.5px; line-height: 1.45;
  background: var(--color-bg); border: 1px solid var(--color-divider); }
.chat-bubble .from { display: block; font-size: 11px; letter-spacing: .04em; text-transform: uppercase;
  color: color-mix(in srgb, var(--color-text) 55%, transparent); margin-bottom: 4px; }
.chat-bubble.original { align-self: flex-start; }
.chat-bubble.translated { align-self: flex-start; border-color: var(--color-accent); position: relative; }
.chat-bubble.translated .tag-live { display: inline-flex; align-items: center; gap: 5px; font-size: 10px;
  letter-spacing: .06em; text-transform: uppercase; color: var(--color-accent-700); margin-bottom: 4px; }
.chat-bubble.translated .tag-live::before { content: ""; width: 6px; height: 6px; background: var(--color-accent);
  border-radius: 50%; animation: pulse 1.6s ease-in-out infinite; }
.chat-bubble .msg-text { min-height: 1.45em; }
.chat-bubble .caret { display: inline-block; width: 2px; height: 1em; background: var(--color-accent);
  vertical-align: -2px; animation: blink 1s step-end infinite; }
@keyframes blink { 50% { opacity: 0; } }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: .35; } }
.chat-mock .compose { margin-top: auto; display: flex; gap: var(--space-2); align-items: center;
  border-top: 2px solid var(--color-divider); padding-top: var(--space-3); }
.chat-mock .compose input { flex: 1; }
@media (prefers-reduced-motion: reduce) { .chat-bubble .caret { animation: none; } .tag-live::before { animation: none; } }

/* — social proof — */
.proof { padding: calc(1.6 * var(--leading)) 0; }
.proof-label { font-size: 12px; letter-spacing: .08em; text-transform: uppercase;
  color: color-mix(in srgb, var(--color-text) 55%, transparent); margin: 0 0 var(--space-4); }
.proof-logos { display: flex; flex-wrap: wrap; gap: clamp(24px, 4vw, 56px); align-items: center; }
.proof-logo { font-family: var(--font-heading); font-weight: 800; font-size: 20px;
  color: color-mix(in srgb, var(--color-text) 45%, transparent); letter-spacing: -0.01em; }
.testimonials { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: var(--space-4);
  margin-top: calc(1.4 * var(--leading)); }
.testimonial { padding: var(--space-4); background: var(--color-surface); border-left: 2px solid var(--color-accent); }
.testimonial p { font-size: 14.5px; line-height: 1.55; margin: 0 0 var(--space-2); }
.testimonial cite { font-style: normal; font-size: 12.5px; color: color-mix(in srgb, var(--color-text) 60%, transparent); }
.placeholder-note { font-size: 12px; color: color-mix(in srgb, var(--color-text) 50%, transparent); margin-top: var(--space-3); }

/* — how it works — */
.steps { padding: calc(2.6 * var(--leading)) 0; }
.steps-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-4);
  counter-reset: step; margin-top: calc(1.2 * var(--leading)); }
.step { border-top: 2px solid var(--color-divider); padding-top: var(--space-3); position: relative; }
.step::before { counter-increment: step; content: counter(step, decimal-leading-zero);
  display: block; font-family: var(--font-heading); font-weight: 800; font-size: 13px;
  color: var(--color-accent); margin-bottom: var(--space-2); font-feature-settings: "tnum" 1; }
.step h3 { font-size: 18px; margin: 0 0 var(--space-1); }
.step p { font-size: 14px; margin: 0; color: color-mix(in srgb, var(--color-text) 78%, transparent); }
.step-arrow { display: none; }
@media (max-width: 880px) { .steps-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 520px) { .steps-grid { grid-template-columns: 1fr; } }

/* — feature rows — */
.features { padding: calc(2.6 * var(--leading)) 0; }
.feature { display: grid; grid-template-columns: minmax(64px, 140px) minmax(0, 340px) minmax(0, 1fr);
  gap: var(--leading) clamp(24px, 4vw, 64px); align-items: baseline; padding: calc(1.3 * var(--leading)) 0; }
.feature + .feature { border-top: 2px solid var(--color-divider); }
.f-num { position: relative; font-family: var(--font-heading); font-weight: 800; font-size: 14px;
  color: var(--color-text); font-feature-settings: "tnum" 1; margin: 0; }
.f-num::before { content: ""; position: absolute; left: -22px; top: 5px; width: 9px; height: 9px; background: var(--color-accent); }
@media (max-width: 1280px) { .f-num::before { display: none; } }
.f-title { font-size: 21px; letter-spacing: -0.01em; margin: 0; }
.f-copy { font-size: 15px; line-height: var(--leading); margin: 0; max-width: 54ch;
  color: color-mix(in srgb, var(--color-text) 78%, transparent); }
@media (max-width: 880px) { .feature { grid-template-columns: 1fr; gap: var(--half); } .f-copy { max-width: var(--measure); } }

/* — pricing cards (shared by index + pricing page) — */
.pricing { padding: calc(2.6 * var(--leading)) 0; }
.price-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: var(--space-4);
  margin-top: calc(1.4 * var(--leading)); align-items: stretch; }
@media (max-width: 1240px) { .price-grid { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 1080px) { .price-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .price-grid { grid-template-columns: 1fr; } }
.price-card { display: flex; flex-direction: column; gap: var(--space-3); padding: var(--space-6);
  background: var(--color-surface); border: 2px solid transparent; transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease; }
.price-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.price-card.featured { border-color: var(--color-accent); background: var(--color-bg); box-shadow: var(--shadow-lg); }
.price-card h3 { font-size: 19px; margin: 0; }
.price-card .price { font-family: var(--font-heading); font-weight: 800; font-size: 38px; margin: var(--space-1) 0 0; }
.price-card .price small { font-size: 14px; font-weight: 400; color: color-mix(in srgb, var(--color-text) 65%, transparent); }
.price-card .price-note { font-size: 12.5px; color: color-mix(in srgb, var(--color-text) 60%, transparent); min-height: 1.4em; }
.price-card ul { list-style: none; margin: var(--space-2) 0 0; padding: 0; display: flex; flex-direction: column; gap: 9px; flex: 1; }
.price-card li { font-size: 14px; padding-left: 20px; position: relative; }
.price-card li::before { content: "\221A"; position: absolute; left: 0; color: var(--color-accent); font-weight: 700; }
.billing-note { font-size: 13.5px; color: color-mix(in srgb, var(--color-text) 70%, transparent); margin: var(--space-3) 0 0; }
.price-card .btn { margin-top: var(--space-2); }

/* — FAQ accordion — */
.faq { padding: calc(2.6 * var(--leading)) 0; }
.faq-list { max-width: 760px; margin-top: calc(1.2 * var(--leading)); }
.faq-item { border-top: 2px solid var(--color-divider); }
.faq-item:last-child { border-bottom: 2px solid var(--color-divider); }
.faq-item summary {
  cursor: pointer; list-style: none; display: flex; align-items: center; justify-content: space-between;
  gap: var(--space-4); padding: var(--space-4) 0; font-family: var(--font-heading); font-weight: 600; font-size: 16px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary:hover { color: var(--color-accent-700); }
.faq-item summary:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 4px; }
.faq-icon { flex: none; width: 18px; height: 18px; position: relative; }
.faq-icon::before, .faq-icon::after { content: ""; position: absolute; background: var(--color-accent); }
.faq-icon::before { left: 0; top: 8px; width: 18px; height: 2px; }
.faq-icon::after { left: 8px; top: 0; width: 2px; height: 18px; transition: transform .2s ease; }
.faq-item[open] .faq-icon::after { transform: rotate(90deg) scaleX(0); }
.faq-item .faq-a { margin: 0 0 var(--space-4); font-size: 14.5px; line-height: 1.6; max-width: 62ch;
  color: color-mix(in srgb, var(--color-text) 82%, transparent); }

/* — poster close — */
.close { background: var(--color-accent); color: var(--color-bg); }
.close .wrap { padding-top: calc(2.6 * var(--leading)); padding-bottom: calc(2.6 * var(--leading)); }
.close h2 { font-size: clamp(30px, 4vw, 48px); line-height: 1.08; margin: 0; margin-left: -0.03em; }
.close p { font-size: 16px; max-width: 56ch; margin: var(--space-3) 0 0; opacity: .92; }
.close .row { display: flex; gap: var(--space-3); flex-wrap: wrap; margin-top: calc(1.2 * var(--leading)); }
.close .btn-ghost { color: var(--color-bg); border-color: var(--color-bg); }
.close .btn-primary { background: var(--color-bg); color: var(--color-accent); }
.close .btn-primary:hover { background: color-mix(in srgb, var(--color-bg) 88%, black); }

/* — site footer — */
.site-footer { padding: calc(1.8 * var(--leading)) 0 calc(1.4 * var(--leading)); }
.footer-grid { display: grid; grid-template-columns: 1.4fr repeat(4, 1fr); gap: var(--space-4); }
.footer-col h4 { font-size: 12px; letter-spacing: .06em; text-transform: uppercase; margin: 0 0 var(--space-3);
  color: color-mix(in srgb, var(--color-text) 60%, transparent); }
.footer-col a { display: block; color: inherit; text-decoration: none; font-size: 14px; padding: 4px 0; }
.footer-col a:hover { color: var(--color-accent); }
.footer-brand { font-family: var(--font-heading); font-weight: 800; font-size: 18px; margin-bottom: var(--space-2); }
.footer-tag { font-size: 13.5px; max-width: 32ch; color: color-mix(in srgb, var(--color-text) 70%, transparent); }
.footer-bottom { display: flex; justify-content: space-between; flex-wrap: wrap; gap: var(--space-2);
  margin-top: calc(1.4 * var(--leading)); padding-top: var(--space-4); border-top: 2px solid var(--color-divider);
  font-size: 12.5px; color: color-mix(in srgb, var(--color-text) 55%, transparent); }
@media (max-width: 880px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 520px) { .footer-grid { grid-template-columns: 1fr; } }

/* — plain content pages (legal / pricing table) — */
.page-hero { padding: calc(2.2 * var(--leading)) 0 calc(1.6 * var(--leading)); }
.page-hero h1 { font-size: clamp(32px, 4.4vw, 48px); margin: 0; margin-left: -0.02em; }
.page-hero .sub { font-size: 16px; margin-top: var(--space-3); color: color-mix(in srgb, var(--color-text) 75%, transparent); max-width: 62ch; }

.lang-select { font: inherit; font-size: 13px; border: 1px solid var(--color-divider); background: var(--color-bg); color: inherit; padding: 6px 8px; cursor: pointer; }
.lang-select:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }
.lang-banner { background: var(--color-surface); border-bottom: 2px solid var(--color-divider); }
.lang-banner-inner { display: flex; align-items: center; justify-content: center; gap: var(--space-3); flex-wrap: wrap; padding: 10px var(--edge); font-size: 13px; text-align: center; color: color-mix(in srgb, var(--color-text) 82%, transparent); }
.lang-banner-inner a { color: var(--color-accent); }
.lang-banner-reset { font: inherit; font-size: 13px; font-weight: 600; color: var(--color-accent); background: none; border: none; cursor: pointer; padding: 0; text-decoration: underline; text-underline-offset: 2px; }

/* — legal / contact prose pages — */
.legal { padding: 0 0 calc(3 * var(--leading)); max-width: 72ch; }
.legal .updated { font-size: 12.5px; color: color-mix(in srgb, var(--color-text) 55%, transparent); margin: 0 0 calc(1.4 * var(--leading)); }
.legal h2 { font-size: 22px; margin: calc(1.6 * var(--leading)) 0 var(--space-2); }
.legal h2:first-of-type { margin-top: 0; }
.legal h3 { font-size: 16px; margin: var(--space-4) 0 var(--space-1); }
.legal p, .legal li { font-size: 15px; line-height: 1.65; color: color-mix(in srgb, var(--color-text) 84%, transparent); }
.legal ul, .legal ol { padding-left: 20px; margin: 0 0 var(--space-3); }
.legal a { text-decoration: underline; }
.legal .callout { border-left: 2px solid var(--color-accent); padding: var(--space-3) var(--space-4); background: var(--color-surface); margin: 0 0 calc(1.4 * var(--leading)); font-size: 14px; }
.contact-card { background: var(--color-surface); padding: var(--space-6); display: flex; flex-direction: column; gap: var(--space-3); max-width: 480px; }
.contact-card h2 { margin: 0; font-size: 20px; }
.contact-card p { margin: 0; font-size: 14.5px; color: color-mix(in srgb, var(--color-text) 78%, transparent); }

/* — pricing page toggle + compare table — */
.toggle-wrap { display: flex; align-items: center; gap: var(--space-3); margin: calc(1.2 * var(--leading)) 0; }
.toggle-wrap .save-tag { font-size: 12.5px; color: var(--color-accent-700); }
.compare { padding: calc(2 * var(--leading)) 0 calc(3 * var(--leading)); overflow-x: auto; }
.compare table { min-width: 940px; }
.compare td:not(:first-child), .compare th:not(:first-child) { text-align: center; }
.compare .yes { color: var(--color-accent-700); font-weight: 600; }
.compare .no { color: color-mix(in srgb, var(--color-text) 35%, transparent); }

/* — user guide — */
.guide-note { font-size: 0.9rem; color: var(--color-neutral-600); border-left: 2px solid var(--color-divider); padding-left: 12px; margin-top: 16px; max-width: 60ch; }
.guide-layout { display: grid; grid-template-columns: minmax(0,1fr) 260px; gap: 48px; align-items: start; border-top: 2px solid var(--color-divider); padding-top: calc(1.4 * var(--leading)); padding-bottom: calc(2.4 * var(--leading)); }
.guide-body { max-width: 68ch; }
.guide-body h2 { font-size: 1.6rem; margin: calc(1.8 * var(--leading)) 0 calc(0.5 * var(--leading)); padding-top: calc(0.9 * var(--leading)); border-top: 2px solid var(--color-divider); scroll-margin-top: 96px; }
.guide-body > h2:first-child { margin-top: 0; padding-top: 0; border-top: 0; }
.guide-body h3 { font-size: 1.12rem; margin: calc(1.2 * var(--leading)) 0 calc(0.3 * var(--leading)); scroll-margin-top: 96px; }
.guide-body h4 { font-size: 0.95rem; text-transform: uppercase; letter-spacing: 0.06em; margin: calc(0.9 * var(--leading)) 0 calc(0.15 * var(--leading)); color: var(--color-accent-700); }
.guide-body p { margin: 0 0 var(--leading); }
.guide-body ol, .guide-body ul { margin: 0 0 var(--leading); padding-left: 1.3em; display: grid; gap: 6px; }
.guide-body li { padding-left: 2px; }
.guide-body code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 0.9em; background: var(--color-neutral-200); padding: 1px 5px; }
.guide-toc { position: sticky; top: 88px; }
.toc-inner { border-left: 2px solid var(--color-divider); padding-left: 16px; max-height: calc(100vh - 120px); overflow-y: auto; }
.toc-summary { display: none; }
.toc-search { display: block; margin-bottom: 12px; }
.toc-search input { width: 100%; font: inherit; font-size: 0.85rem; padding: 8px 10px; border: 2px solid var(--color-divider); border-radius: 0; background: var(--color-surface, #fff); color: var(--color-text); }
.toc-search input:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; border-color: var(--color-accent); }
.toc-list { display: grid; gap: 2px; }
.toc-link { display: block; font-size: 0.82rem; line-height: 1.35; padding: 4px 0; color: var(--color-neutral-700); text-decoration: none; }
.toc-link.toc-l1 { font-weight: 600; color: var(--color-text); margin-top: 10px; text-transform: uppercase; letter-spacing: 0.04em; font-size: 0.76rem; }
.toc-link.toc-l2 { padding-left: 10px; }
.toc-link:hover { color: var(--color-accent-700); }
.toc-link.is-active { color: var(--color-accent-700); box-shadow: inset 2px 0 0 var(--color-accent); padding-left: 12px; }
.toc-link.toc-l1.is-active { padding-left: 12px; }
.toc-empty { font-size: 0.82rem; color: var(--color-neutral-600); margin: 0 0 8px; }
@media (max-width: 900px) {
  .guide-layout { grid-template-columns: 1fr; gap: 20px; padding-top: var(--leading); }
  .guide-toc { position: static; order: -1; top: auto; }
  .toc-inner { max-height: none; overflow: visible; border-left: 0; border: 2px solid var(--color-divider); padding: 0 14px 14px; }
  .toc-inner:not([open]) { padding-bottom: 0; }
  .toc-summary { display: block; list-style: none; cursor: pointer; font-size: 0.8rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.06em; padding: 14px 0; position: relative; }
  .toc-summary::-webkit-details-marker { display: none; }
  .toc-summary::after { content: '+'; position: absolute; right: 0; top: 50%; transform: translateY(-50%); font-size: 1.1rem; line-height: 1; color: var(--color-accent); }
  .toc-inner[open] .toc-summary::after { content: '−'; }
  .toc-summary:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }
  .toc-list { max-height: 46vh; overflow-y: auto; }
  .toc-search input { padding: 11px 12px; font-size: 0.95rem; }
  .toc-link { padding: 9px 0; font-size: 0.9rem; }
  .toc-link.toc-l1 { font-size: 0.8rem; }
  .guide-body { max-width: none; }
  .guide-body h2 { font-size: 1.35rem; }
  .guide-body h3 { font-size: 1.05rem; }
  .guide-body ol, .guide-body ul { padding-left: 1.15em; }
  .guide-body code { word-break: break-word; }
}

.brand-mark { display: block; object-fit: contain; flex: none; }