/* Landing-page styles. Design tokens all come from styles.css, which is the
   port of the desktop app's theme.py — nothing here invents a new colour. */

.skip-link {
  position: absolute; left: -9999px; top: var(--space-3);
  background: var(--primary); color: var(--on-primary);
  padding: var(--space-3) var(--space-5); border-radius: var(--radius-sm); z-index: 200;
}
.skip-link:focus { left: var(--space-5); }

/* ----------------------------------------------------------------- nav --- */

.nav {
  position: sticky; top: 0; z-index: 100;
  background: color-mix(in srgb, var(--canvas) 88%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color .2s ease, box-shadow .2s ease;
}
.nav.is-stuck { border-bottom-color: var(--border); box-shadow: var(--shadow-sm); }

.nav-inner { display: flex; align-items: center; gap: var(--space-7); height: 66px; }

.brand { display: inline-flex; align-items: center; gap: var(--space-3); color: var(--ink); }
.brand:hover { text-decoration: none; }
.brand-mark { width: 30px; height: 30px; flex: none; }
.brand-name { font-weight: 700; font-size: 1.12rem; letter-spacing: -.02em; }

.nav-links { display: flex; gap: var(--space-6); margin-left: var(--space-4); }
.nav-links a { color: var(--slate); font-size: .92rem; font-weight: 600; }
.nav-links a:hover { color: var(--ink); text-decoration: none; }

.nav-actions { margin-left: auto; display: flex; gap: var(--space-3); }

.nav-toggle {
  display: none; margin-left: auto; background: none; border: 0;
  width: 40px; height: 40px; cursor: pointer; padding: 9px 8px;
  flex-direction: column; justify-content: space-between;
}
.nav-toggle span { display: block; height: 2px; background: var(--ink); border-radius: 2px; }

/* ---------------------------------------------------------------- hero --- */

.hero {
  padding-block: clamp(var(--space-10), 7vw, var(--space-16)) clamp(var(--space-12), 8vw, var(--space-16));
  /* A very soft indigo wash, so the hero reads as the brand without
     spending the accent colour on a giant block of fill. */
  background:
    radial-gradient(1100px 460px at 12% -10%, var(--primary-tint), transparent 62%),
    radial-gradient(900px 420px at 96% 8%, color-mix(in srgb, var(--indigo-300) 22%, transparent), transparent 60%);
}
.hero-inner {
  display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
  gap: clamp(var(--space-8), 5vw, var(--space-12)); align-items: center;
}
.hero-copy h1 { margin-block: var(--space-5) var(--space-5); }
.hero-copy .lead { max-width: 52ch; }
.hero-cta { margin-top: var(--space-8); }
.hero-note { margin-top: var(--space-5); }

/* ------------------------------------------------- app window mock --- */

.appwin {
  display: grid; grid-template-columns: 168px minmax(0, 1fr);
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-xl); overflow: hidden;
  box-shadow: var(--shadow-lg);
}
.appwin-rail { background: var(--rail); padding: var(--space-5) var(--space-3); }
.rail-brand {
  display: flex; align-items: center; gap: var(--space-3);
  color: #fff; font-weight: 700; font-size: .9rem;
  padding: 0 var(--space-3) var(--space-6);
}
.rail-mark { width: 22px; height: 22px; }
.rail-item {
  padding: var(--space-3) var(--space-4); border-radius: var(--radius-sm);
  color: var(--rail-text); font-size: .78rem; margin-bottom: 2px;
}
.rail-item.is-active {
  background: var(--rail-active); color: var(--rail-text-active); font-weight: 700;
  box-shadow: inset 3px 0 0 var(--indigo-400);
}

.appwin-body { padding: var(--space-5); background: var(--canvas); min-width: 0; }
.appwin-titlebar {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: var(--space-5);
}
.appwin-title { font-weight: 700; font-size: 1rem; }
.appwin-cols { display: grid; grid-template-columns: 1.15fr 1fr; gap: var(--space-4); }

.viewfinder {
  background: #0F1216;   /* the app's VIEWFINDER: dark glass in both themes */
  border-radius: var(--radius-md); padding: var(--space-4);
  display: flex; flex-direction: column; justify-content: space-between; min-height: 176px;
}
.vf-frame {
  border: 1px dashed rgba(255,255,255,.22); border-radius: var(--radius-sm);
  padding: var(--space-4); display: flex; flex-direction: column; gap: 7px; flex: 1;
}
.vf-line { height: 5px; border-radius: 3px; background: rgba(255,255,255,.30); }
.vf-label { color: rgba(255,255,255,.5); font-size: .64rem; text-transform: uppercase; letter-spacing: .08em; margin-top: var(--space-3); }

.queue { display: flex; flex-direction: column; gap: var(--space-3); }
.queue-row {
  display: flex; align-items: center; justify-content: space-between; gap: var(--space-3);
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-md); padding: var(--space-3) var(--space-4); font-size: .78rem;
}
.queue-row.is-pending { opacity: .55; }
.queue-sub { color: var(--muted); font-size: .68rem; }

/* --------------------------------------------------------------- strip --- */

.strip { border-block: 1px solid var(--border); background: var(--surface); }
.strip-grid { padding-block: var(--space-9); }
.strip-num {
  font-size: 1.5rem; font-weight: 700; color: var(--primary-text);
  margin-bottom: var(--space-3);
}

/* ------------------------------------------------------------ sections --- */

.section-alt { background: var(--surface); border-block: 1px solid var(--border); }

.feature { transition: border-color .15s ease, transform .15s ease, box-shadow .15s ease; }
.feature:hover { border-color: var(--primary-border); transform: translateY(-2px); box-shadow: var(--shadow-md); }
.feature-icon {
  width: 42px; height: 42px; display: grid; place-items: center;
  background: var(--primary-tint); border: 1px solid var(--primary-border);
  border-radius: var(--radius-md); font-size: 1.15rem; margin-bottom: var(--space-5);
}
.feature h3 { margin-bottom: var(--space-3); }

/* --------------------------------------------------------------- steps --- */

.steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(258px, 1fr)); gap: var(--space-7); }
.step { position: relative; padding-top: var(--space-6); border-top: 2px solid var(--border); }
.step-n { font-size: .8rem; font-weight: 700; color: var(--primary-text); margin-bottom: var(--space-3); }
.step h3 { margin-bottom: var(--space-3); }

.callout {
  margin-top: var(--space-9); padding: var(--space-6) var(--space-7);
  background: var(--primary-tint); border: 1px solid var(--primary-border);
  border-left: 3px solid var(--primary); border-radius: var(--radius-md);
  color: var(--ink); max-width: 780px;
}
.callout strong { display: block; margin-bottom: var(--space-2); }

/* ---------------------------------------------------------------- chat --- */

.chat-split {
  display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, .85fr);
  gap: clamp(var(--space-8), 5vw, var(--space-12)); align-items: center;
}
.chat-split h2 { margin-block: var(--space-3) var(--space-4); }

.ticks { list-style: none; padding: 0; margin-top: var(--space-6); display: grid; gap: var(--space-4); }
.ticks li { position: relative; padding-left: var(--space-8); color: var(--slate); }
.ticks li::before {
  content: "✓"; position: absolute; left: 0; top: 1px;
  width: 21px; height: 21px; display: grid; place-items: center;
  background: var(--success-tint); color: var(--success);
  border: 1px solid var(--success-border); border-radius: var(--radius-full);
  font-size: .68rem; font-weight: 700;
}

.chat-demo {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-xl); overflow: hidden; box-shadow: var(--shadow-lg);
}
.chat-demo-head {
  display: flex; align-items: center; gap: var(--space-4);
  padding: var(--space-4) var(--space-5); border-bottom: 1px solid var(--border);
  background: var(--surface-2); font-size: .88rem;
}
.avatar {
  width: 34px; height: 34px; border-radius: var(--radius-full); flex: none;
  display: grid; place-items: center; color: #fff; font-size: .72rem; font-weight: 700;
}
.dot-online {
  display: inline-block; width: 7px; height: 7px; border-radius: var(--radius-full);
  background: var(--tier-high-dot); margin-right: 5px;
}
.chat-demo-body { padding: var(--space-5); display: flex; flex-direction: column; gap: var(--space-3); }

.bubble {
  max-width: 78%; padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-lg); font-size: .84rem; line-height: 1.45;
}
.bubble.them {
  align-self: flex-start; background: var(--surface-2);
  border: 1px solid var(--border); border-bottom-left-radius: var(--radius-xs);
}
.bubble.me {
  align-self: flex-end; background: var(--primary); color: var(--on-primary);
  border-bottom-right-radius: var(--radius-xs);
}
.bubble.file { display: flex; align-items: center; gap: var(--space-3); }
.bubble.file .text-muted { color: rgba(255,255,255,.75); }
.file-icon { font-size: 1.2rem; }
.ticks-read { font-size: .66rem; opacity: .85; margin-left: var(--space-3); }

.typing {
  display: flex; align-items: center; gap: 4px;
  color: var(--muted); font-size: .74rem; padding-top: var(--space-2);
}
.typing span {
  width: 5px; height: 5px; border-radius: 50%; background: var(--muted);
  animation: blink 1.3s infinite;
}
.typing span:nth-child(2) { animation-delay: .18s; }
.typing span:nth-child(3) { animation-delay: .36s; margin-right: var(--space-3); }
@keyframes blink { 0%, 60%, 100% { opacity: .25 } 30% { opacity: 1 } }

/* ----------------------------------------------------------------- faq --- */

.faq {
  border-bottom: 1px solid var(--border); padding-block: var(--space-5);
}
.faq summary {
  cursor: pointer; font-weight: 700; font-size: 1.02rem;
  list-style: none; display: flex; align-items: center; justify-content: space-between; gap: var(--space-4);
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--primary-text); font-size: 1.3rem; flex: none; }
.faq[open] summary::after { content: "−"; }
.faq p { color: var(--slate); margin-top: var(--space-4); max-width: 68ch; }

/* ----------------------------------------------------------------- cta --- */

.cta {
  background:
    radial-gradient(760px 320px at 50% 0%, var(--primary-tint), transparent 68%);
  border-top: 1px solid var(--border);
}

/* -------------------------------------------------------------- footer --- */

.footer { background: var(--surface); border-top: 1px solid var(--border); }
.footer-inner {
  display: flex; gap: var(--space-8); justify-content: space-between;
  flex-wrap: wrap; padding-block: var(--space-9) var(--space-7);
}
.footer-links { display: flex; gap: var(--space-6); flex-wrap: wrap; align-items: flex-start; }
.footer-links a { color: var(--slate); font-size: .9rem; }
.footer-bottom {
  display: flex; align-items: center; justify-content: space-between;
  padding-block: var(--space-5); border-top: 1px solid var(--border-subtle);
  font-size: .85rem;
}

/* ------------------------------------------------------------ responsive --- */

@media (max-width: 940px) {
  .hero-inner, .chat-split { grid-template-columns: minmax(0, 1fr); }
  .hero-visual { order: -1; }
  .appwin { grid-template-columns: 132px minmax(0, 1fr); }
  .appwin-cols { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 760px) {
  .nav-links, .nav-actions { display: none; }
  .nav-toggle { display: flex; }

  body.nav-open .nav-links {
    display: flex; flex-direction: column; gap: var(--space-4);
    position: absolute; inset: 66px 0 auto; margin: 0;
    background: var(--surface); border-bottom: 1px solid var(--border);
    padding: var(--space-6); box-shadow: var(--shadow-md);
  }
  body.nav-open .nav-actions {
    display: flex; position: absolute; inset: 218px 0 auto;
    background: var(--surface); padding: 0 var(--space-6) var(--space-6);
    border-bottom: 1px solid var(--border);
  }
  .appwin { grid-template-columns: minmax(0, 1fr); }
  .appwin-rail { display: flex; gap: var(--space-2); overflow-x: auto; padding: var(--space-3); }
  .rail-brand { display: none; }
  .rail-item { white-space: nowrap; margin: 0; }
  .footer-inner { flex-direction: column; gap: var(--space-6); }
}