/* ============================================================
   STZ Developer — shared stylesheet
   Brand: charcoal #14181C · off-white #F4F3EF · green #1D9E75
   Type: Inter (headings/body) · JetBrains Mono (labels/brand)
   ============================================================ */

:root {
  --bg: #101418;
  --bg-soft: #14181c;
  --bg-card: #181e23;
  --bg-raised: #1f262c;
  --line: #2a3138;
  --accent: #1d9e75;
  --accent-bright: #2cc492;
  --accent-dim: rgba(29, 158, 117, 0.14);
  --text: #f4f3ef;
  --text-soft: #9aa3ab;
  --text-faint: #6e7781;
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.45);
  --radius: 18px;
  --display: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: "JetBrains Mono", "SF Mono", Menlo, Consolas, monospace;
}

html[data-theme="light"] {
  --bg: #f4f3ef;
  --bg-soft: #eceae3;
  --bg-card: #ffffff;
  --bg-raised: #efede6;
  --line: #dbd8ce;
  --accent: #178a66;
  --accent-bright: #116b4f;
  --accent-dim: rgba(23, 138, 102, 0.12);
  --text: #14181c;
  --text-soft: #4a545c;
  --text-faint: #7a828a;
  --shadow: 0 18px 50px rgba(30, 40, 35, 0.14);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16.5px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  transition: background 0.35s ease, color 0.35s ease;
}

::selection { background: var(--accent); color: #f4f3ef; }

img { max-width: 100%; display: block; }

a { color: var(--accent-bright); text-decoration: none; }
a:hover { text-decoration: underline; }

.container { max-width: 1120px; margin: 0 auto; padding: 0 24px; }

/* ---------- Navigation ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--mono);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--text);
}
.brand:hover { text-decoration: none; }
.brand small {
  font-weight: 500;
  font-size: 0.78rem;
  color: var(--text-faint);
  letter-spacing: 0.18em;
}

.brand-mark {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  display: block;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 26px;
  list-style: none;
}

.nav-links a {
  color: var(--text-soft);
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  transition: color 0.2s;
}
.nav-links a:hover, .nav-links a.active { color: var(--accent-bright); text-decoration: none; }

.nav-cta {
  padding: 8px 18px;
  border: 1px solid var(--accent);
  border-radius: 999px;
  color: var(--accent-bright) !important;
  transition: background 0.2s, color 0.2s;
}
.nav-cta:hover { background: var(--accent); color: #f4f3ef !important; }

.theme-toggle {
  background: none;
  border: 1px solid var(--line);
  border-radius: 999px;
  width: 40px;
  height: 40px;
  cursor: pointer;
  display: grid;
  place-items: center;
  font-size: 1.05rem;
  color: var(--text-soft);
  transition: border-color 0.2s, transform 0.2s;
}
.theme-toggle:hover { border-color: var(--accent); transform: rotate(15deg); }

.nav-burger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  width: 40px;
  height: 40px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}
.nav-burger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.25s, opacity 0.25s;
}
.nav-burger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-burger.open span:nth-child(2) { opacity: 0; }
.nav-burger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 780px) {
  .nav-burger { display: flex; }
  .nav-links {
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    background: var(--bg-soft);
    border-bottom: 1px solid var(--line);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
  }
  .nav-links.open { max-height: 360px; }
  .nav-links li { width: 100%; }
  .nav-links a { display: block; padding: 15px 24px; width: 100%; }
  .nav-cta { border: none; border-radius: 0; }
  .nav-cta:hover { background: var(--accent-dim); color: var(--accent-bright) !important; }
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: 100px 0 90px;
  text-align: center;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: -40% -20% auto;
  height: 130%;
  background:
    radial-gradient(ellipse 55% 45% at 50% 0%, var(--accent-dim), transparent 70%),
    radial-gradient(ellipse 35% 30% at 18% 25%, rgba(29, 158, 117, 0.06), transparent 70%),
    radial-gradient(ellipse 35% 30% at 82% 25%, rgba(29, 158, 117, 0.06), transparent 70%);
  pointer-events: none;
}

.hero > .container { position: relative; }

.hero-kicker {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent-bright);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 7px 18px;
  margin-bottom: 28px;
  background: var(--bg-soft);
}

.hero h1 {
  font-family: var(--display);
  font-size: clamp(2.4rem, 5.5vw, 4rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.025em;
  margin-bottom: 10px;
}

.hero h1 em {
  font-style: normal;
  color: var(--accent-bright);
}

.hero p.lead {
  max-width: 640px;
  margin: 18px auto 0;
  color: var(--text-soft);
  font-size: 1.12rem;
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 40px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 13px 28px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.98rem;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s, background 0.2s, color 0.2s;
  border: 1px solid transparent;
}
.btn:hover { text-decoration: none; transform: translateY(-2px); }

.btn-accent {
  background: linear-gradient(135deg, var(--accent-bright), var(--accent));
  color: #0f1418;
  box-shadow: 0 8px 24px rgba(29, 158, 117, 0.3);
}
.btn-accent:hover { box-shadow: 0 12px 32px rgba(29, 158, 117, 0.42); }
html[data-theme="light"] .btn-accent { color: #f4f3ef; }

.btn-ghost {
  border-color: var(--line);
  color: var(--text);
  background: var(--bg-soft);
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent-bright); }

/* ---------- Brand video panel ---------- */
.brand-video {
  width: min(560px, calc(100% - 8px));
  margin: 52px auto 0;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  background: #14181c;
}
.brand-video video,
.brand-video img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

/* ---------- Stats strip ---------- */
.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  margin-top: 70px;
}

.stat {
  background: var(--bg-card);
  padding: 28px 18px;
  text-align: center;
}

.stat b {
  display: block;
  font-family: var(--mono);
  font-size: 1.9rem;
  font-weight: 700;
  color: var(--accent-bright);
  line-height: 1.2;
}

.stat span {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-faint);
}

/* ---------- Sections ---------- */
.section { padding: 90px 0; }
.section.alt { background: var(--bg-soft); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }

.section-head { max-width: 660px; margin-bottom: 52px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }

.section-kicker {
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent-bright);
  margin-bottom: 14px;
}

.section-head h2 {
  font-family: var(--display);
  font-size: clamp(1.8rem, 3.6vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.18;
  margin-bottom: 14px;
}

.section-head p { color: var(--text-soft); font-size: 1.05rem; }

/* ---------- Cards ---------- */
.card {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform 0.28s ease, box-shadow 0.28s ease, border-color 0.28s ease;
}
.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow);
  border-color: color-mix(in srgb, var(--accent) 45%, var(--line));
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--mono);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 5px 12px;
  border-radius: 999px;
}
.badge-live { background: var(--accent-dim); color: var(--accent-bright); border: 1px solid color-mix(in srgb, var(--accent) 40%, transparent); }
.badge-live::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--accent); animation: pulse 2s infinite; }
.badge-dev { background: rgba(154, 163, 171, 0.12); color: var(--text-soft); border: 1px solid var(--line); }
.badge-soon { background: rgba(110, 119, 129, 0.12); color: var(--text-faint); border: 1px solid var(--line); }

@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(29, 158, 117, 0.5); }
  55% { box-shadow: 0 0 0 6px rgba(29, 158, 117, 0); }
}

.chip {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-faint);
  background: var(--bg-raised);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 4px 12px;
}

/* ---------- Featured app ---------- */
.featured {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 56px;
  align-items: center;
}
@media (max-width: 880px) {
  .featured { grid-template-columns: 1fr; }
  .featured .featured-media-first { order: 2; }
}

.featured-copy .badge { margin-bottom: 20px; }

.featured-copy h3 {
  font-family: var(--display);
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin-bottom: 14px;
}

.featured-copy p { color: var(--text-soft); margin-bottom: 14px; }

.app-icon-lg {
  width: 84px;
  height: 84px;
  border-radius: 20px;
  box-shadow: var(--shadow);
  margin-bottom: 24px;
}

.store-badges { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 26px; }

.store-badge {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  background: var(--bg-raised);
  border: 1px solid var(--line);
  border-radius: 13px;
  padding: 10px 20px 10px 15px;
  transition: border-color 0.2s, transform 0.2s;
}
.store-badge:hover { border-color: var(--accent); transform: translateY(-2px); text-decoration: none; }
.store-badge svg { width: 26px; height: 26px; fill: var(--text); flex-shrink: 0; }
.store-badge small { display: block; font-size: 0.68rem; color: var(--text-faint); letter-spacing: 0.06em; text-transform: uppercase; line-height: 1.3; }
.store-badge b { display: block; font-size: 1rem; color: var(--text); line-height: 1.25; }

.phone-stack {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 480px;
}

.phone-stack img {
  width: 225px;
  border-radius: 26px;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  transition: transform 0.4s ease;
}

.phone-stack img:first-child {
  transform: rotate(-7deg) translateX(46px);
  z-index: 1;
}
.phone-stack img:last-child {
  transform: rotate(5deg) translateX(-46px) translateY(24px);
  z-index: 2;
}
.phone-stack:hover img:first-child { transform: rotate(-9deg) translateX(58px) translateY(-8px); }
.phone-stack:hover img:last-child { transform: rotate(7deg) translateX(-58px) translateY(16px); }

/* ---------- App grid ---------- */
.app-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(310px, 1fr));
  gap: 26px;
}

.app-card { padding: 30px; display: flex; flex-direction: column; }

.app-card-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 18px;
}

.app-glyph {
  width: 58px;
  height: 58px;
  border-radius: 15px;
  display: grid;
  place-items: center;
  font-size: 1.7rem;
  background: var(--accent-dim);
  border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent);
  flex-shrink: 0;
}

.app-card h3 {
  font-family: var(--display);
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.015em;
  line-height: 1.25;
}

.app-card p { color: var(--text-soft); font-size: 0.97rem; margin: 10px 0 18px; flex: 1; }

.app-card-chips { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 4px; }

.app-card .card-link {
  margin-top: 16px;
  font-weight: 600;
  font-size: 0.94rem;
  color: var(--accent-bright);
}
.app-card .card-link::after { content: " →"; transition: margin 0.2s; }
.app-card .card-link:hover::after { margin-left: 4px; }

/* progress bar */
.progress {
  height: 6px;
  border-radius: 999px;
  background: var(--bg-raised);
  border: 1px solid var(--line);
  overflow: hidden;
  margin-top: 14px;
}
.progress i {
  display: block;
  height: 100%;
  width: 0;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--accent), var(--accent-bright));
  transition: width 1.1s cubic-bezier(0.25, 0.9, 0.3, 1);
}
.progress-label {
  display: flex;
  justify-content: space-between;
  font-family: var(--mono);
  font-size: 0.68rem;
  color: var(--text-faint);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-top: 8px;
}

/* ---------- Filter bar ---------- */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin-bottom: 46px;
}

.filter-btn {
  background: var(--bg-card);
  border: 1px solid var(--line);
  color: var(--text-soft);
  font-family: var(--mono);
  font-size: 0.82rem;
  font-weight: 600;
  padding: 9px 20px;
  border-radius: 999px;
  cursor: pointer;
  transition: all 0.2s;
}
.filter-btn:hover { border-color: var(--accent); color: var(--accent-bright); }
.filter-btn.active { background: var(--accent); border-color: var(--accent); color: #f4f3ef; }

.app-card.hidden { display: none; }

/* ---------- App detail page ---------- */
.app-hero {
  padding: 90px 0 70px;
  position: relative;
  overflow: hidden;
}
.app-hero::before {
  content: "";
  position: absolute;
  inset: -30% 0 auto;
  height: 120%;
  background: radial-gradient(ellipse 60% 50% at 50% 0%, var(--accent-dim), transparent 70%);
  pointer-events: none;
}
.app-hero .container { position: relative; }

.app-hero-inner {
  display: flex;
  gap: 36px;
  align-items: center;
  flex-wrap: wrap;
}

.app-hero-icon {
  width: 128px;
  height: 128px;
  border-radius: 30px;
  box-shadow: var(--shadow);
}

.app-hero h1 {
  font-family: var(--display);
  font-size: clamp(2.1rem, 4.6vw, 3.2rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.15;
}

.app-hero .tagline { color: var(--text-soft); font-size: 1.1rem; max-width: 560px; margin-top: 10px; }

/* screenshots strip */
.shots {
  display: flex;
  gap: 22px;
  overflow-x: auto;
  padding: 10px 4px 26px;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
}
.shots::-webkit-scrollbar { height: 8px; }
.shots::-webkit-scrollbar-thumb { background: var(--line); border-radius: 999px; }
.shots img {
  width: 235px;
  flex-shrink: 0;
  border-radius: 24px;
  border: 1px solid var(--line);
  box-shadow: 0 10px 30px rgba(0,0,0,0.3);
  scroll-snap-align: center;
  cursor: zoom-in;
  transition: transform 0.25s;
}
.shots img:hover { transform: translateY(-6px); }

/* lightbox */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: rgba(12, 15, 18, 0.92);
  display: none;
  place-items: center;
  padding: 30px;
  cursor: zoom-out;
}
.lightbox.open { display: grid; }
.lightbox img {
  max-height: 88vh;
  max-width: 92vw;
  border-radius: 20px;
  box-shadow: 0 30px 80px rgba(0,0,0,0.6);
}
.lightbox-close {
  position: absolute;
  top: 22px;
  right: 28px;
  background: none;
  border: none;
  color: #fff;
  font-size: 2rem;
  cursor: pointer;
  opacity: 0.7;
}
.lightbox-close:hover { opacity: 1; }

/* feature grid */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}

.feature-item {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px;
  transition: transform 0.25s, border-color 0.25s;
}
.feature-item:hover { transform: translateY(-4px); border-color: color-mix(in srgb, var(--accent) 45%, var(--line)); }

.feature-item .fi-icon { font-size: 1.6rem; margin-bottom: 14px; }
.feature-item h4 { font-family: var(--display); font-size: 1.15rem; font-weight: 700; letter-spacing: -0.01em; margin-bottom: 8px; }
.feature-item p { color: var(--text-soft); font-size: 0.95rem; }

/* books */
.books {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 26px;
}
@media (max-width: 700px) { .books { grid-template-columns: 1fr; } }

.book-card {
  padding: 34px;
  text-align: center;
}
.book-card h4 { font-family: var(--display); font-size: 1.25rem; font-weight: 700; margin-bottom: 10px; }
.book-card p { color: var(--text-soft); font-size: 0.95rem; }

/* quote band */
.quote-band {
  text-align: center;
  padding: 80px 24px;
}
.quote-band cite {
  font-family: var(--mono);
  font-style: normal;
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  color: var(--text-faint);
}

/* ---------- Timeline ---------- */
.timeline { position: relative; max-width: 760px; margin: 0 auto; padding-left: 34px; }
.timeline::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: linear-gradient(var(--accent), var(--line));
}
.timeline-item { position: relative; padding-bottom: 38px; }
.timeline-item:last-child { padding-bottom: 0; }
.timeline-item::before {
  content: "";
  position: absolute;
  left: -32px;
  top: 7px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--bg);
  border: 3px solid var(--accent);
}
.timeline-item h4 { font-family: var(--display); font-size: 1.2rem; font-weight: 700; letter-spacing: -0.01em; }
.timeline-item .tl-when { font-family: var(--mono); font-size: 0.7rem; letter-spacing: 0.16em; text-transform: uppercase; color: var(--accent-bright); font-weight: 700; }
.timeline-item p { color: var(--text-soft); font-size: 0.97rem; margin-top: 6px; }

/* ---------- Contact / footer ---------- */
.contact-band {
  text-align: center;
  padding: 90px 24px;
}
.contact-band h2 { font-family: var(--display); font-size: clamp(1.8rem, 3.6vw, 2.4rem); font-weight: 700; letter-spacing: -0.02em; margin-bottom: 14px; }
.contact-band p { color: var(--text-soft); max-width: 520px; margin: 0 auto 30px; }

.footer {
  border-top: 1px solid var(--line);
  padding: 44px 0;
  background: var(--bg-soft);
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}
.footer p { color: var(--text-faint); font-size: 0.88rem; }
.footer nav { display: flex; gap: 20px; }
.footer nav a { color: var(--text-soft); font-size: 0.9rem; }
.footer-lockup { height: 44px; width: auto; }

/* ---------- Scroll reveal ---------- */
.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.visible { opacity: 1; transform: none; }
.reveal-d1 { transition-delay: 0.08s; }
.reveal-d2 { transition-delay: 0.16s; }
.reveal-d3 { transition-delay: 0.24s; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  * { animation: none !important; }
}