/* ==========================================================================
   Cortex landing page — navy-glass theme · cyan accent + amber (logo) echo
   ========================================================================== */
:root {
  --bg: #060912;            /* deep navy-black */
  --bg-2: #0a0f1e;          /* navy panel base */
  --bg-3: #0e1426;
  --text: #e8edf7;
  --text-dim: #9aa6bd;
  --text-mute: #64708a;
  --accent: #38bdf8;        /* cyan (matches the app) */
  --accent-2: #0ea5e9;
  --accent-glow: rgba(56, 189, 248, 0.22);
  --amber: #f6a23c;         /* warm echo from the logo */
  --amber-glow: rgba(246, 162, 60, 0.18);
  --glass: rgba(255, 255, 255, 0.035);
  --glass-2: rgba(255, 255, 255, 0.06);
  --border: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(56, 189, 248, 0.45);
  --radius: 16px;
  --radius-sm: 10px;
  --maxw: 1140px;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --shadow: 0 20px 50px rgba(0, 0, 0, 0.45);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.container.narrow { max-width: 800px; }

/* ---- Ambient backdrop ---- */
.bg-grid {
  position: fixed; inset: 0; z-index: -2;
  background-image:
    linear-gradient(rgba(56,189,248,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(56,189,248,0.05) 1px, transparent 1px);
  background-size: 54px 54px;
  mask-image: radial-gradient(ellipse 90% 60% at 50% 0%, #000 30%, transparent 78%);
}
.bg-orb {
  position: fixed; z-index: -1; border-radius: 50%;
  filter: blur(90px); opacity: 0.5; pointer-events: none;
}
.orb-1 { top: -160px; left: -120px; width: 520px; height: 520px;
  background: radial-gradient(circle, var(--accent-glow), transparent 70%); }
.orb-2 { top: 260px; right: -160px; width: 480px; height: 480px;
  background: radial-gradient(circle, var(--amber-glow), transparent 70%);
  animation: float 14s ease-in-out infinite alternate; }
@keyframes float { from { transform: translateY(0); } to { transform: translateY(40px); } }

/* ---- Buttons ---- */
.btn {
  display: inline-flex; align-items: center; gap: 9px;
  font-weight: 600; font-size: 0.95rem; line-height: 1;
  padding: 12px 20px; border-radius: var(--radius-sm);
  border: 1px solid transparent; cursor: pointer; transition: all .2s ease;
  white-space: nowrap;
}
.btn svg { flex: none; }
.btn-sm { padding: 9px 16px; font-size: 0.88rem; }
.btn-lg { padding: 15px 26px; font-size: 1rem; }
.btn-block { width: 100%; justify-content: center; }
.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #04121f; box-shadow: 0 8px 24px var(--accent-glow);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 30px var(--accent-glow); filter: brightness(1.05); }
.btn-ghost { background: var(--glass); color: var(--text); border-color: var(--border); }
.btn-ghost:hover { border-color: var(--border-hover); background: var(--glass-2); }
.btn[aria-disabled="true"], .btn.is-disabled {
  background: var(--glass); color: var(--text-mute); box-shadow: none;
  cursor: default; pointer-events: none; border: 1px solid var(--border);
}

/* ---- Nav ---- */
.nav {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  background: rgba(6, 9, 18, 0.72);
  border-bottom: 1px solid transparent; transition: border-color .3s, background .3s;
}
.nav.scrolled { border-bottom-color: var(--border); background: rgba(6, 9, 18, 0.9); }
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 66px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; }
.brand-logo { width: 32px; height: 32px; border-radius: 8px; }
.brand-name { font-size: 1.15rem; letter-spacing: .2px; }
.nav-links { display: flex; gap: 28px; }
.nav-links a { color: var(--text-dim); font-size: 0.92rem; font-weight: 500; transition: color .2s; }
.nav-links a:hover { color: var(--text); }
.nav-cta { display: flex; align-items: center; gap: 12px; }
.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: 0; cursor: pointer; padding: 6px; }
.nav-toggle span { width: 22px; height: 2px; background: var(--text); border-radius: 2px; transition: .3s; }

/* ---- Hero ---- */
.hero { padding: 90px 0 70px; text-align: center; position: relative; }
.hero-inner { display: flex; flex-direction: column; align-items: center; }
.hero-logo-wrap { position: relative; margin-bottom: 26px; }
.hero-logo { width: 132px; height: 132px; border-radius: 28px; position: relative; z-index: 1;
  box-shadow: 0 18px 50px rgba(0,0,0,.5); }
.hero-logo-glow {
  position: absolute; inset: -28px; border-radius: 50%;
  background: radial-gradient(circle, var(--amber-glow), var(--accent-glow) 55%, transparent 72%);
  filter: blur(18px); animation: pulse 4s ease-in-out infinite;
}
@keyframes pulse { 0%,100% { opacity: .65; transform: scale(1); } 50% { opacity: 1; transform: scale(1.08); } }
.pill {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 0.82rem; color: var(--text-dim); font-weight: 500;
  padding: 7px 15px; border-radius: 50px; border: 1px solid var(--border);
  background: var(--glass); margin-bottom: 24px;
}
.pill .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 10px var(--accent); }
.hero-title { font-size: clamp(2.4rem, 6vw, 4.2rem); font-weight: 900; line-height: 1.05; letter-spacing: -1.5px; }
.grad-text { background: linear-gradient(120deg, var(--accent), #7dd3fc 40%, var(--amber)); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.hero-sub { max-width: 680px; margin: 22px auto 0; color: var(--text-dim); font-size: clamp(1rem, 1.4vw, 1.18rem); }
.hero-sub strong { color: var(--text); font-weight: 600; }
.hero-actions { display: flex; gap: 14px; margin-top: 34px; flex-wrap: wrap; justify-content: center; }
.hero-meta { margin-top: 24px; color: var(--text-mute); font-size: 0.85rem; display: flex; gap: 10px; align-items: center; flex-wrap: wrap; justify-content: center; }
.meta-sep { opacity: .4; }
.ver-badge { color: var(--accent); font-weight: 600; }

/* ---- Trust strip ---- */
.trust { border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); background: rgba(255,255,255,0.015); }
.trust-inner { display: flex; flex-wrap: wrap; gap: 14px 40px; justify-content: center; padding: 22px 24px; color: var(--text-dim); font-size: 0.9rem; font-weight: 500; }

/* ---- Sections ---- */
.section { padding: 92px 0; position: relative; }
.section-alt { background: linear-gradient(180deg, transparent, rgba(255,255,255,0.015), transparent); }
.section-head { text-align: center; max-width: 660px; margin: 0 auto 52px; }
.eyebrow { color: var(--accent); font-weight: 700; font-size: 0.82rem; letter-spacing: 1.5px; text-transform: uppercase; }
.section-head h2 { font-size: clamp(1.9rem, 3.6vw, 2.8rem); font-weight: 800; letter-spacing: -0.8px; margin-top: 12px; }
.section-head p { color: var(--text-dim); margin-top: 14px; font-size: 1.05rem; }

.grid { display: grid; gap: 20px; }
.features-grid { grid-template-columns: repeat(3, 1fr); }
.steps-grid { grid-template-columns: repeat(3, 1fr); }
.downloads-grid { grid-template-columns: repeat(3, 1fr); max-width: 880px; margin-inline: auto; }
.shots-grid { grid-template-columns: repeat(2, 1fr); }

/* ---- Cards ---- */
.card {
  background: var(--glass); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 26px;
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
  transition: transform .25s ease, border-color .25s ease, background .25s ease;
}
.card:hover { transform: translateY(-4px); border-color: var(--border-hover); background: var(--glass-2); }
.card-icon { font-size: 1.7rem; width: 52px; height: 52px; display: grid; place-items: center;
  border-radius: 13px; background: linear-gradient(135deg, var(--accent-glow), var(--amber-glow)); margin-bottom: 16px; }
.card h3 { font-size: 1.18rem; font-weight: 700; margin-bottom: 8px; }
.card p { color: var(--text-dim); font-size: 0.95rem; }
.card p strong { color: var(--text); }

/* ---- Steps ---- */
.step { position: relative; }
.step-num { width: 38px; height: 38px; border-radius: 50%; display: grid; place-items: center;
  font-weight: 800; color: #04121f; background: linear-gradient(135deg, var(--accent), var(--accent-2)); margin-bottom: 14px; }
.code-row { display: flex; align-items: center; gap: 8px; margin-top: 16px;
  background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 8px 8px 8px 14px; }
.code-row code { font-family: ui-monospace, "SF Mono", Menlo, monospace; font-size: 0.82rem; color: var(--accent); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.copy-btn { margin-left: auto; flex: none; background: var(--glass-2); border: 1px solid var(--border); color: var(--text-dim);
  border-radius: 7px; padding: 6px 11px; font-size: 0.78rem; font-weight: 600; cursor: pointer; transition: .2s; }
.copy-btn:hover { color: var(--text); border-color: var(--border-hover); }

/* ---- Screenshots ---- */
.shot { border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; background: var(--bg-2); }
.shot.shot-wide { grid-column: 1 / -1; }
.shot img { width: 100%; height: 100%; object-fit: cover; aspect-ratio: 16 / 9; background: var(--bg-3); transition: transform .4s ease; }
.shot.shot-wide img { aspect-ratio: 21 / 9; }
.shot:hover img { transform: scale(1.025); }
.shot figcaption { padding: 12px 16px; color: var(--text-dim); font-size: 0.88rem; border-top: 1px solid var(--border); }
/* Missing-screenshot placeholder (until PNGs are added) */
.shot-empty img { display: none; }
.shot-empty { position: relative; }
.shot-empty::before {
  content: "Screenshot coming soon";
  display: grid; place-items: center;
  aspect-ratio: 16 / 9; color: var(--text-mute); font-size: 0.85rem; letter-spacing: .3px;
  background:
    radial-gradient(circle at 50% 40%, var(--accent-glow), transparent 60%),
    repeating-linear-gradient(45deg, rgba(255,255,255,0.015) 0 12px, transparent 12px 24px),
    var(--bg-3);
}
.shot-empty.shot-wide::before { aspect-ratio: 21 / 9; }

/* ---- Downloads ---- */
.dl-version { font-weight: 600; }
.dl-card { display: flex; flex-direction: column; gap: 14px; text-align: left; }
.dl-card[data-detected] { border-color: var(--border-hover); box-shadow: 0 0 0 1px var(--accent-glow), 0 18px 40px rgba(0,0,0,.4); }
.dl-os { display: flex; align-items: center; gap: 13px; color: var(--accent); }
.dl-os h3 { font-size: 1.1rem; color: var(--text); }
.dl-meta { font-size: 0.8rem; color: var(--text-mute); font-weight: 500; }
.dl-btn { margin-top: auto; }
.dl-note { font-size: 0.78rem; color: var(--text-mute); text-align: center; }
.dl-card[data-detected] .dl-note::before { content: "✓ Recommended for you · "; color: var(--accent); }
.dl-foot { text-align: center; margin-top: 34px; color: var(--text-dim); }
.dl-foot a { color: var(--accent); font-weight: 600; }

/* ---- FAQ ---- */
.faq details { border: 1px solid var(--border); border-radius: var(--radius-sm); margin-bottom: 12px; background: var(--glass); overflow: hidden; }
.faq summary { padding: 18px 22px; font-weight: 600; cursor: pointer; list-style: none; display: flex; justify-content: space-between; align-items: center; transition: color .2s; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--accent); font-size: 1.4rem; font-weight: 400; transition: transform .25s; }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq summary:hover { color: var(--accent); }
.faq p { padding: 0 22px 20px; color: var(--text-dim); font-size: 0.95rem; }
.faq p strong { color: var(--text); } .faq em { color: var(--accent); font-style: normal; }

/* ---- Footer ---- */
.footer { border-top: 1px solid var(--border); padding: 56px 0 30px; margin-top: 40px; background: rgba(255,255,255,0.012); }
.footer-inner { display: flex; justify-content: space-between; gap: 30px; flex-wrap: wrap; padding-bottom: 30px; border-bottom: 1px solid var(--border); }
.footer-brand { display: flex; gap: 14px; align-items: center; }
.footer-logo { width: 46px; height: 46px; border-radius: 11px; }
.footer-brand p { color: var(--text-mute); font-size: 0.88rem; max-width: 440px; }
.footer-brand .handle { color: var(--accent); font-weight: 600; }
.footer-brand .handle:hover { text-decoration: underline; }
.footer-links { display: flex; gap: 26px; align-items: center; flex-wrap: wrap; }
.footer-links a { color: var(--text-dim); font-size: 0.92rem; transition: color .2s; }
.footer-links a:hover { color: var(--accent); }
.footer-bottom { display: flex; justify-content: space-between; gap: 14px; flex-wrap: wrap; padding-top: 22px; color: var(--text-mute); font-size: 0.85rem; }

/* ---- Scroll reveal ---- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .7s cubic-bezier(.16,1,.3,1), transform .7s cubic-bezier(.16,1,.3,1); }
.reveal.in { opacity: 1; transform: none; }

/* ---- Responsive ---- */
@media (max-width: 940px) {
  .features-grid, .steps-grid { grid-template-columns: repeat(2, 1fr); }
  .downloads-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 720px) {
  .nav-links { position: fixed; inset: 66px 0 auto 0; flex-direction: column; gap: 0;
    background: rgba(6,9,18,.97); backdrop-filter: blur(14px); border-bottom: 1px solid var(--border);
    padding: 8px 24px 18px; transform: translateY(-120%); transition: transform .3s ease; }
  .nav-links.open { transform: translateY(0); }
  .nav-links a { padding: 13px 0; border-bottom: 1px solid var(--border); width: 100%; }
  .nav-toggle { display: flex; }
  .nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav-toggle.open span:nth-child(2) { opacity: 0; }
  .nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  .features-grid, .steps-grid, .downloads-grid, .shots-grid { grid-template-columns: 1fr; }
  .shot.shot-wide { grid-column: auto; }
  .section { padding: 64px 0; }
  .hero { padding: 56px 0 50px; }
  .footer-inner { flex-direction: column; }
}
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .orb-2, .hero-logo-glow { animation: none; }
  html { scroll-behavior: auto; }
}