@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

:root {
  --bg: #ffffff;
  --surface: #f8f9fb;
  --surface2: #eef0f6;
  --accent: #4263eb;
  --accent-dark: #3451c7;
  --accent-glow: rgba(66, 99, 235, 0.08);
  --text: #1a1a2e;
  --text-muted: #64748b;
  --border: #e2e8f0;
  --radius: 12px;
  --radius-sm: 8px;
  --max-width: 1100px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

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

/* ── Nav ── */

nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 1px 8px rgba(26, 26, 46, 0.06);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.nav-logo {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.nav-logo-img {
  height: 54px;
  width: auto;
  display: block;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s;
  text-decoration: none;
}

.nav-links a:hover,
.nav-links a.active { color: var(--text); }

.nav-links a.active { color: var(--accent); }

.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
  background: none;
  border: none;
}

.nav-hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all 0.25s;
}

.nav-hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-hamburger.open span:nth-child(2) { opacity: 0; }
.nav-hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ── Main / Footer ── */

main { flex: 1; }

footer {
  border-top: 1px solid var(--border);
  padding: 2rem 1.5rem;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
}

footer a { color: var(--text-muted); }
footer a:hover { color: var(--accent); text-decoration: none; }

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
}

.footer-links {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
  justify-content: center;
}

/* ── Utilities ── */

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.badge {
  display: inline-block;
  background: var(--accent-glow);
  color: var(--accent);
  border: 1px solid rgba(245, 166, 35, 0.25);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.25rem 0.65rem;
  border-radius: 99px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.65rem 1.3rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all 0.2s;
  text-decoration: none;
}

.btn-primary {
  background: var(--accent);
  color: #ffffff;
}

.btn-primary:hover {
  background: var(--accent-dark);
  text-decoration: none;
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(66, 99, 235, 0.3);
}

.btn-outline {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
  text-decoration: none;
}

/* ── Hero ── */

.hero {
  padding: 6rem 1.5rem 5rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -100px;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(66, 99, 235, 0.07) 0%, transparent 70%);
  pointer-events: none;
}

.hero-inner { position: relative; max-width: 680px; margin: 0 auto; }

.hero h1 {
  font-size: clamp(2.4rem, 6vw, 3.8rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin: 1rem 0 1.25rem;
}

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

.hero p {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 520px;
  margin: 0 auto 2rem;
  line-height: 1.7;
}

.hero-cta { display: flex; gap: 0.75rem; justify-content: center; flex-wrap: wrap; }

/* ── Section titles ── */

.section-header {
  text-align: center;
  margin-bottom: 2.5rem;
}

.section-header h2 {
  font-size: 1.8rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-top: 0.5rem;
}

.section-header p {
  color: var(--text-muted);
  margin-top: 0.5rem;
  font-size: 0.95rem;
}

/* ── App cards ── */

.apps-section { padding: 4rem 1.5rem; }

.apps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.25rem;
  max-width: var(--max-width);
  margin: 0 auto;
}

.app-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  transition: border-color 0.2s, transform 0.2s, box-shadow 0.2s;
  text-decoration: none;
  color: var(--text);
}

.app-card:hover {
  border-color: rgba(245, 166, 35, 0.4);
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(0,0,0,0.4);
  text-decoration: none;
  color: var(--text);
}

.app-card-icon {
  width: 64px;
  height: 64px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  background: var(--surface2);
  flex-shrink: 0;
}

.app-card-meta { display: flex; align-items: center; gap: 0.5rem; flex-wrap: wrap; }

.app-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.app-card p { color: var(--text-muted); font-size: 0.9rem; }

.app-card-footer {
  margin-top: auto;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.platform-tag {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.15rem 0.45rem;
  font-size: 0.75rem;
  font-weight: 500;
}

/* ── About strip ── */

.about-strip {
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 4rem 1.5rem;
}

.about-strip-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.about-strip h2 {
  font-size: 1.8rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}

.about-strip p {
  color: var(--text-muted);
  margin-bottom: 1rem;
  line-height: 1.7;
}

.about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.stat-box {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  text-align: center;
}

.stat-box .stat-num {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--accent);
  letter-spacing: -0.03em;
}

.stat-box .stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 0.15rem;
}

/* ── About page ── */

.page-hero {
  padding: 4rem 1.5rem 3rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  top: -80px;
  left: 50%;
  transform: translateX(-50%);
  width: 500px;
  height: 400px;
  background: radial-gradient(circle, rgba(66, 99, 235, 0.06) 0%, transparent 70%);
  pointer-events: none;
}

.page-hero-inner { position: relative; max-width: 600px; margin: 0 auto; }

.page-hero h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-top: 0.75rem;
}

.page-hero p {
  color: var(--text-muted);
  font-size: 1rem;
  margin-top: 0.75rem;
  line-height: 1.7;
}

.content-section { padding: 3rem 1.5rem; }

.content-grid {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

.content-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
}

.content-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--accent);
}

.content-card p,
.content-card li {
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.7;
}

.content-card ul { padding-left: 1.2rem; display: flex; flex-direction: column; gap: 0.4rem; }

.contact-section {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 4rem 1.5rem;
}

.contact-inner { max-width: 540px; margin: 0 auto; text-align: center; }

.contact-inner h2 {
  font-size: 1.8rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
}

.contact-inner p { color: var(--text-muted); margin-bottom: 2rem; }

.contact-links { display: flex; flex-direction: column; gap: 1rem; }

.contact-link-row {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  text-align: left;
  transition: border-color 0.2s;
  text-decoration: none;
  color: var(--text);
}

.contact-link-row:hover {
  border-color: var(--accent);
  text-decoration: none;
  color: var(--text);
}

.contact-link-icon {
  width: 40px;
  height: 40px;
  background: var(--surface2);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.contact-link-text small { display: block; color: var(--text-muted); font-size: 0.75rem; }
.contact-link-text span { font-size: 0.9rem; font-weight: 500; }

/* ── App detail page ── */

.app-hero {
  padding: 4rem 1.5rem 3rem;
  position: relative;
  overflow: hidden;
}

.app-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 0%, rgba(66, 99, 235, 0.08) 0%, transparent 60%);
  pointer-events: none;
}

.app-hero-inner {
  position: relative;
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  gap: 2.5rem;
  align-items: center;
}

.app-hero-icon {
  width: 120px;
  height: 120px;
  border-radius: 26px;
  background: linear-gradient(135deg, #4263eb, #6741d9);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3.5rem;
  flex-shrink: 0;
  box-shadow: 0 8px 32px rgba(66, 99, 235, 0.3);
}

.app-hero-text h1 {
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin: 0.5rem 0;
}

.app-hero-text p {
  color: var(--text-muted);
  font-size: 1rem;
  max-width: 500px;
  line-height: 1.7;
  margin-bottom: 1.5rem;
}

.app-download-btns { display: flex; gap: 0.75rem; flex-wrap: wrap; }

.store-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.6rem 1.1rem;
  color: var(--text);
  font-size: 0.85rem;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.2s;
}

.store-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  text-decoration: none;
}

.store-btn svg { width: 20px; height: 20px; flex-shrink: 0; }

.app-content { padding: 3rem 1.5rem; }

.app-content-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 2rem;
  align-items: start;
}

.app-screenshots {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: 2rem;
}

.app-screenshots h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.screenshot-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
}

.screenshot-placeholder {
  aspect-ratio: 9/16;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 0.75rem;
  text-align: center;
}

.app-description {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: 2rem;
}

.app-description h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.app-description p {
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.7;
  margin-bottom: 0.75rem;
}

.feature-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-top: 1rem;
}

.feature-item {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.feature-item::before {
  content: '✦';
  color: var(--accent);
  font-size: 0.7rem;
  margin-top: 0.3rem;
  flex-shrink: 0;
}

.faq-section {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.faq-section h3 {
  font-size: 1rem;
  font-weight: 600;
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border);
}

.faq-item { border-bottom: 1px solid var(--border); }
.faq-item:last-child { border-bottom: none; }

.faq-question {
  width: 100%;
  background: none;
  border: none;
  color: var(--text);
  font-family: inherit;
  font-size: 0.88rem;
  font-weight: 500;
  padding: 1rem 1.5rem;
  text-align: left;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  transition: color 0.2s;
}

.faq-question:hover { color: var(--accent); }

.faq-question .faq-icon {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  border: 1px solid var(--border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  transition: all 0.2s;
}

.faq-item.open .faq-question .faq-icon {
  background: var(--accent);
  border-color: var(--accent);
  color: #ffffff;
}

.faq-answer {
  display: none;
  padding: 0 1.5rem 1rem;
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.7;
}

.faq-item.open .faq-answer { display: block; }

.app-sidebar {}

.sidebar-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  margin-bottom: 1rem;
}

.sidebar-card h4 {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.75rem;
}

.info-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.85rem;
}

.info-row:last-child { border-bottom: none; }
.info-row .label { color: var(--text-muted); }
.info-row .value { font-weight: 500; }

/* ── Responsive ── */

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.98);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    padding: 1.5rem;
    gap: 1.25rem;
  }

  .nav-links.open { display: flex; }
  .nav-hamburger { display: flex; }

  .about-strip-inner { grid-template-columns: 1fr; gap: 2rem; }
  .content-grid { grid-template-columns: 1fr; }
  .app-hero-inner { flex-direction: column; text-align: center; }
  .app-hero-icon { width: 96px; height: 96px; font-size: 2.8rem; border-radius: 22px; }
  .app-download-btns { justify-content: center; }
  .app-content-inner { grid-template-columns: 1fr; }
  .screenshot-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 480px) {
  .hero { padding: 4rem 1.25rem 3.5rem; }
  .screenshot-grid { grid-template-columns: 1fr 1fr; }
}