:root {
  --bg: #000000;
  --fg: #FFFFFF;
  --muted: #8E8E93;
  --accent: #007AFF;
  --surface: #1C1C1E;
  --border: #1C1C1E;
  --font-serif: 'Playfair Display', Georgia, 'Times New Roman', serif;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-serif);
  font-size: 18px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

/* ─── Nav ─────────────────────────────────────────────────── */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 28px 64px;
  border-bottom: 1px solid var(--border);
}

.nav-mark {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-logo {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 700;
  color: var(--fg);
  text-decoration: none;
  letter-spacing: -0.3px;
}

.nav-tagline {
  font-size: 13px;
  color: var(--muted);
  letter-spacing: 0.02em;
}

.nav-cta {
  font-family: var(--font-serif);
  font-size: 13px;
  color: var(--fg);
  text-decoration: none;
  background: var(--surface);
  padding: 8px 20px;
  border-radius: 100px;
  transition: opacity 0.2s;
}

.nav-cta:hover { opacity: 0.72; }

/* ─── Wave mark ─────────────────────────────────────────── */
.wave-mark {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.wave-mark-row {
  display: flex;
  gap: 5px;
  align-items: center;
}

/* ─── Hero ───────────────────────────────────────────────── */
.hero {
  padding: 96px 64px 80px;
  max-width: 1100px;
  margin: 0 auto;
}

.hero-eyebrow {
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 24px;
}

.hero-headline {
  font-family: var(--font-serif);
  font-size: clamp(40px, 5vw, 64px);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -1.5px;
  color: var(--fg);
  margin-bottom: 28px;
  max-width: 700px;
}

.hero-sub {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 400;
  color: var(--muted);
  line-height: 1.65;
  max-width: 520px;
  margin-bottom: 48px;
}

/* ─── Buttons ─────────────────────────────────────────────── */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background: var(--fg);
  color: var(--bg);
  font-family: var(--font-serif);
  font-size: 16px;
  font-weight: 600;
  text-decoration: none;
  padding: 20px 40px;
  height: 64px;
  border-radius: 32px;
  border: none;
  cursor: pointer;
  letter-spacing: -0.2px;
  transition: opacity 0.2s;
  width: fit-content;
}

.btn-primary:hover { opacity: 0.88; }

.btn-primary svg { flex-shrink: 0; }

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background: var(--surface);
  color: var(--fg);
  font-family: var(--font-serif);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  padding: 12px 24px;
  border-radius: 32px;
  border: none;
  cursor: pointer;
  transition: opacity 0.2s;
}

.btn-secondary:hover { opacity: 0.80; }

.hero-pricing-note {
  margin-top: 20px;
  font-size: 13px;
  color: var(--muted);
  letter-spacing: 0.01em;
}

/* ─── The Loop ───────────────────────────────────────────── */
.loop {
  padding: 80px 64px;
  border-top: 1px solid var(--border);
}

.loop-header {
  max-width: 1100px;
  margin: 0 auto 56px;
}

.loop-header h2 {
  font-family: var(--font-serif);
  font-size: 14px;
  font-weight: 400;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 8px;
}

.loop-header h3 {
  font-family: var(--font-serif);
  font-size: 28px;
  font-weight: 700;
  color: var(--fg);
  letter-spacing: -0.5px;
}

.loop-grid {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
}

.loop-panel {
  padding: 40px 40px 40px 0;
  border-right: 1px solid var(--border);
}

.loop-panel:last-child { border-right: none; }
.loop-panel:not(:first-child) { padding-left: 40px; }

.loop-icon {
  margin-bottom: 20px;
}

.loop-panel h4 {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 700;
  color: var(--fg);
  margin-bottom: 12px;
  letter-spacing: -0.3px;
}

.loop-panel p {
  font-size: 15px;
  color: var(--muted);
  line-height: 1.7;
}

/* ─── Differentiation ────────────────────────────────────── */
.diff {
  padding: 80px 64px;
  border-top: 1px solid var(--border);
  max-width: 1100px;
  margin: 0 auto;
}

.diff h2 {
  font-family: var(--font-serif);
  font-size: clamp(28px, 3.5vw, 42px);
  font-weight: 700;
  color: var(--fg);
  letter-spacing: -1px;
  margin-bottom: 56px;
}

.diff-row {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 40px;
  padding: 40px 0;
  border-bottom: 1px solid var(--border);
  align-items: start;
}

.diff-row:last-child { border-bottom: none; }

.diff-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--fg);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding-top: 4px;
}

.diff-body p {
  font-family: var(--font-serif);
  font-size: 16px;
  color: var(--muted);
  line-height: 1.7;
}

.diff-body strong {
  color: var(--fg);
  font-weight: 700;
}

/* ─── Aesthetic section ─────────────────────────────────── */
.aesthetic {
  padding: 100px 64px;
  border-top: 1px solid var(--border);
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.aesthetic-text h2 {
  font-family: var(--font-serif);
  font-size: clamp(28px, 3.5vw, 42px);
  font-weight: 700;
  color: var(--fg);
  letter-spacing: -1px;
  margin-bottom: 24px;
}

.aesthetic-text p {
  font-family: var(--font-serif);
  font-size: 18px;
  color: var(--muted);
  line-height: 1.75;
}

.aesthetic-img {
  display: flex;
  justify-content: center;
}

.aesthetic-img img {
  width: 100%;
  max-width: 340px;
  border-radius: 16px;
  border: 1px solid var(--border);
}

/* ─── Pricing ────────────────────────────────────────────── */
.pricing {
  padding: 80px 64px;
  border-top: 1px solid var(--border);
}

.pricing-inner {
  max-width: 700px;
  margin: 0 auto;
}

.pricing h2 {
  font-family: var(--font-serif);
  font-size: clamp(28px, 3.5vw, 42px);
  font-weight: 700;
  color: var(--fg);
  letter-spacing: -1px;
  text-align: center;
  margin-bottom: 48px;
}

.pricing-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 36px;
}

.pricing-card {
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 36px;
  background: var(--surface);
}

.pricing-card.lifetime { }

.pricing-plan {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 16px;
}

.pricing-card.lifetime .pricing-plan { color: var(--fg); }

.pricing-amount {
  font-family: var(--font-serif);
  font-size: 36px;
  font-weight: 700;
  color: var(--fg);
  letter-spacing: -1px;
  margin-bottom: 4px;
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.pricing-strike {
  font-family: var(--font-serif);
  font-size: 18px;
  color: var(--muted);
  text-decoration: line-through;
  font-weight: 400;
}

.pricing-unit {
  font-family: var(--font-serif);
  font-size: 18px;
  color: var(--muted);
  font-weight: 400;
}

.pricing-desc {
  font-size: 14px;
  color: var(--muted);
  margin-top: 12px;
}

.pricing-cta {
  text-align: center;
}

/* ─── Footer ─────────────────────────────────────────────── */
.site-footer {
  padding: 56px 64px;
  border-top: 1px solid var(--border);
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-left {
  display: flex;
  align-items: center;
  gap: 20px;
}

.footer-brand {
  font-family: var(--font-serif);
  font-size: 14px;
  font-weight: 700;
  color: var(--fg);
}

.footer-built {
  font-size: 13px;
  color: var(--muted);
}

.footer-links {
  display: flex;
  gap: 28px;
  align-items: center;
}

.footer-links a {
  font-size: 13px;
  color: var(--muted);
  text-decoration: none;
  transition: color 0.2s;
}

.footer-links a:hover { color: var(--fg); }

.footer-tagline {
  font-family: var(--font-serif);
  font-size: 14px;
  color: var(--muted);
  font-style: italic;
  padding-top: 2px;
}

/* ─── Responsive ─────────────────────────────────────────── */
@media (max-width: 900px) {
  .nav { padding: 20px 32px; }
  .hero { padding: 64px 32px 56px; }
  .loop { padding: 64px 32px; }
  .loop-grid { grid-template-columns: 1fr; }
  .loop-panel { border-right: none; border-bottom: 1px solid var(--border); padding: 0 0 40px; }
  .loop-panel:not(:first-child) { padding-left: 0; }
  .loop-panel:last-child { border-bottom: none; padding-bottom: 0; }
  .diff { padding: 64px 32px; }
  .diff-row { grid-template-columns: 1fr; gap: 12px; }
  .aesthetic { grid-template-columns: 1fr; gap: 40px; padding: 64px 32px; }
  .aesthetic-img { order: -1; }
  .pricing { padding: 64px 32px; }
  .site-footer { padding: 40px 32px; }
  .footer-inner { flex-direction: column; gap: 24px; align-items: flex-start; }
}

@media (max-width: 600px) {
  .nav-tagline { display: none; }
  .hero-headline { font-size: 36px; }
  .hero-sub { font-size: 17px; }
  .pricing-grid { grid-template-columns: 1fr; }
  .hero { padding: 48px 24px 48px; }
  .loop, .diff, .aesthetic, .pricing { padding-left: 24px; padding-right: 24px; }
  .site-footer { padding: 32px 24px; }
}
/* ─── App Store Badge Button ────────────────────────────── */
.btn-appstore {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  background: var(--fg);
  color: var(--bg);
  font-family: var(--font-serif);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -0.2px;
  text-decoration: none;
  padding: 0 36px;
  height: 56px;
  border-radius: 32px;
  border: none;
  cursor: pointer;
  transition: opacity 0.25s;
  width: fit-content;
}

.btn-appstore:hover { opacity: 0.88; }

.btn-appstore svg { flex-shrink: 0; }
.btn-appstore .apple-logo { flex-shrink: 0; }

.btn-appstore .btn-appstore-label {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  line-height: 1.15;
}

.btn-appstore .btn-appstore-sub {
  font-size: 9px;
  font-weight: 400;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--bg);
  opacity: 0.55;
}

.btn-appstore .btn-appstore-name {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -0.3px;
  color: var(--bg);
}

/* Hero: full-width CTA variant */
.hero .btn-appstore {
  height: 64px;
  padding: 0 40px;
}

.hero .btn-appstore .btn-appstore-sub { font-size: 10px; }
.hero .btn-appstore .btn-appstore-name { font-size: 18px; }