/* ─── Custom Properties ─────────────────────────────── */
:root {
  --c-primary:  #E65100;
  --c-amber:    #F57C00;
  --c-gold:     #FFC107;
  --c-green:    #388E3C;
  --c-bg:       #FAFAFA;
  --c-surface:  #FFFFFF;
  --c-text:     #1A1A1A;
  --c-text-2:   #5C5C5C;
  --c-border:   #E0E0E0;
  --c-gradient: linear-gradient(90deg, #E65100, #FFC107);

  --font:       -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
                Oxygen, Ubuntu, Cantarell, sans-serif;
  --radius:     12px;
  --radius-sm:  8px;
  --shadow:     0 2px 8px rgba(0,0,0,0.08);
  --shadow-lg:  0 4px 20px rgba(0,0,0,0.13);
  --max-w:      960px;
  --gap:        1.5rem;
}

/* ─── Reset & Base ──────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background: var(--c-bg);
  color: var(--c-text);
  line-height: 1.6;
}
a { color: var(--c-primary); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ─── Layout ────────────────────────────────────────── */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* ─── Header ────────────────────────────────────────── */
header {
  background: var(--c-surface);
  border-bottom: 1px solid var(--c-border);
  position: sticky;
  top: 0;
  z-index: 100;
}
.header-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0.875rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  color: var(--c-text);
}
.logo:hover { text-decoration: none; }
.logo-mark {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  background: var(--c-gradient);
  border-radius: var(--radius-sm);
  color: #fff;
  font-weight: 700;
  font-size: 0.875rem;
  letter-spacing: 0.02em;
  flex-shrink: 0;
}
.logo-name {
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}
nav a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--c-text-2);
  padding: 0.375rem 0.75rem;
  border-radius: var(--radius-sm);
  transition: background 0.15s, color 0.15s;
}
nav a:hover {
  background: #F5F5F5;
  color: var(--c-primary);
  text-decoration: none;
}

/* ─── Hero ──────────────────────────────────────────── */
.hero {
  background: linear-gradient(160deg, #FFF3E0 0%, #FFFDE7 60%, var(--c-bg) 100%);
  padding: 5rem 0 4rem;
  text-align: center;
}
.hero h1 {
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 1.25rem;
}
.hero-desc {
  font-size: 1.125rem;
  color: var(--c-text-2);
  max-width: 540px;
  margin: 0 auto 2.5rem;
  line-height: 1.7;
}

/* Play Store Badge */
.badge-play {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  background: #1C1B1F;
  color: #fff;
  padding: 0.75rem 1.375rem;
  border-radius: var(--radius);
  transition: transform 0.15s, box-shadow 0.15s;
  box-shadow: var(--shadow);
}
.badge-play:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  text-decoration: none;
}
.badge-icon { font-size: 1.75rem; line-height: 1; color: #69B4FF; }
.badge-text { display: flex; flex-direction: column; text-align: left; }
.badge-pre {
  font-size: 0.6875rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  opacity: 0.75;
  line-height: 1.1;
}
.badge-store {
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.2;
}

/* ─── Sections (shared) ─────────────────────────────── */
section { padding: 4rem 0; }
section h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 2.5rem;
  text-align: center;
}

/* ─── Card (shared accent stripe) ──────────────────── */
.card {
  background: var(--c-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  position: relative;
  transition: box-shadow 0.2s, transform 0.2s;
}
.card:hover { box-shadow: var(--shadow-lg); transform: translateY(-2px); }
.card::before {
  content: '';
  display: block;
  height: 4px;
  background: var(--c-gradient);
}
.card-body { padding: 1.5rem; }

/* ─── Features ──────────────────────────────────────── */
.features { background: var(--c-bg); }
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: var(--gap);
}
.feature-icon { font-size: 2rem; margin-bottom: 0.75rem; display: block; }
.feature-title { font-size: 1rem; font-weight: 700; margin-bottom: 0.375rem; }
.feature-desc { font-size: 0.9rem; color: var(--c-text-2); line-height: 1.55; }
.feature-badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: #FFF3E0;
  color: var(--c-primary);
  padding: 0.125rem 0.5rem;
  border-radius: 999px;
  margin-top: 0.625rem;
}

/* ─── Screenshots ───────────────────────────────────── */
.screenshots { background: #F0F0F0; }
.screenshot-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--gap);
}
.screenshot-card {
  background: var(--c-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.screenshot-card::before {
  content: '';
  display: block;
  height: 4px;
  background: var(--c-gradient);
}
.screenshot-placeholder {
  aspect-ratio: 9 / 18;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  background: linear-gradient(160deg, #FFF8F0, #FFF3E0);
  color: var(--c-text-2);
  font-size: 0.8rem;
  text-align: center;
  padding: 1rem;
}
.screenshot-placeholder .ph-icon { font-size: 2rem; opacity: 0.35; }
.screenshot-placeholder p { font-size: 0.75rem; }
.screenshot-card img {
  display: block;
  width: 100%;
  aspect-ratio: 9 / 18;
  object-fit: cover;
  object-position: top;
}
.screenshot-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-align: center;
  padding: 0.625rem 0.5rem;
  color: var(--c-text-2);
}

/* ─── Pro Callout ───────────────────────────────────── */
.pro-callout {
  background: linear-gradient(135deg, var(--c-primary) 0%, #BF360C 100%);
  color: #fff;
  text-align: center;
}
.pro-callout h2 { color: #fff; margin-bottom: 0.875rem; }
.pro-callout p {
  font-size: 1.05rem;
  opacity: 0.9;
  max-width: 480px;
  margin: 0 auto 1.75rem;
  line-height: 1.65;
}
.pro-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.625rem;
  justify-content: center;
  list-style: none;
  margin-bottom: 2.5rem;
}
.pro-chips li {
  background: rgba(255,255,255,0.15);
  padding: 0.375rem 1rem;
  border-radius: 999px;
  font-size: 0.875rem;
  font-weight: 500;
}
.btn-outline-white {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  border: 2px solid rgba(255,255,255,0.7);
  color: #fff;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 600;
  transition: background 0.15s, border-color 0.15s;
}
.btn-outline-white:hover {
  background: rgba(255,255,255,0.15);
  border-color: #fff;
  text-decoration: none;
}

/* ─── Footer ────────────────────────────────────────── */
footer {
  background: var(--c-surface);
  border-top: 1px solid var(--c-border);
  padding: 2rem 0;
  text-align: center;
  font-size: 0.875rem;
  color: var(--c-text-2);
}
footer a { color: var(--c-text-2); }
footer a:hover { color: var(--c-primary); }
.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.25rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.375rem;
}

/* ─── Privacy / Prose ───────────────────────────────── */
.prose { padding: 4rem 0 5rem; }
.prose-inner {
  max-width: 680px;
  margin: 0 auto;
  padding: 0 1.25rem;
}
.prose h1 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 0.5rem;
}
.prose .meta {
  font-size: 0.875rem;
  color: var(--c-text-2);
  margin-bottom: 3rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--c-border);
}
.prose h2 {
  font-size: 1.2rem;
  font-weight: 700;
  margin: 2.5rem 0 0.625rem;
  text-align: left;
  letter-spacing: -0.01em;
  color: var(--c-text);
}
.prose p { font-size: 0.95rem; color: var(--c-text-2); line-height: 1.75; margin-bottom: 0.75rem; }
.prose ul { padding-left: 1.5rem; margin: 0.5rem 0 0.75rem; }
.prose li { font-size: 0.95rem; color: var(--c-text-2); line-height: 1.7; margin-bottom: 0.25rem; }
.notice-box {
  background: #FFF3E0;
  border-left: 4px solid var(--c-primary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 1rem 1.25rem;
  margin: 2rem 0;
  font-size: 0.9rem;
  color: var(--c-text);
  line-height: 1.65;
}

/* ─── Responsive ────────────────────────────────────── */
@media (max-width: 960px) {
  .screenshot-row { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .hero { padding: 3rem 0 2.5rem; }
  section { padding: 3rem 0; }
  .feature-grid { grid-template-columns: 1fr; gap: 1rem; }
  .screenshot-row {
    display: flex;
    flex-direction: row;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    gap: 1rem;
    padding-bottom: 1rem;
    -webkit-overflow-scrolling: touch;
    grid-template-columns: unset;
  }
  .screenshot-card {
    flex: 0 0 190px;
    scroll-snap-align: start;
  }
}