/* -------------------------------------------------------------------------
 * Form — marketing site
 * Mirrors the editorial monochrome design system of the iOS app:
 * pure black bg, pure white fg, muted greys, hairline rules, compressed
 * display type, tracked monospace micro-labels. No gradients, no accents.
 * ------------------------------------------------------------------------- */

:root {
  /* Palette */
  --bg: #000000;
  --fg: #ffffff;
  --mute: #7a7a7a;
  --mute-strong: #a8a8a8;
  --rule: #242424;
  --rule-strong: #3a3a3a;
  --surface: #0a0a0a;

  /* Spacing */
  --gutter: clamp(20px, 5vw, 44px);
  --space-xs: 8px;
  --space-sm: 16px;
  --space-md: 24px;
  --space-lg: 40px;
  --space-xl: 64px;
  --space-2xl: 96px;
  --space-3xl: 140px;

  /* Typography */
  --display-font: 'Barlow Condensed', 'Oswald', -apple-system, 'SF Pro Display', 'Arial Narrow', sans-serif;
  --body-font: -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'Inter', 'Helvetica Neue', Arial, sans-serif;
  --mono-font: ui-monospace, 'SF Mono', Menlo, Consolas, 'Courier New', monospace;
  --serif-font: 'Times New Roman', Georgia, serif;

  /* Layout */
  --max-width: 1280px;
  --prose-width: 720px;
}

/* -------------------------------------------------------------------------
 * Reset & base
 * ------------------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--body-font);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

img, svg { display: block; max-width: 100%; height: auto; }

a {
  color: inherit;
  text-decoration: none;
  transition: opacity 180ms ease, color 180ms ease, border-color 180ms ease;
}
a:hover { opacity: 0.7; }

hr { border: none; height: 1px; background: var(--rule); margin: 0; }

/* -------------------------------------------------------------------------
 * Utilities
 * ------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.hairline { height: 1px; background: var(--rule); }
.hairline--strong { background: var(--rule-strong); }
.hairline--soft { background: rgba(255,255,255,0.08); }

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap; border: 0;
}

/* -------------------------------------------------------------------------
 * Typography primitives
 * ------------------------------------------------------------------------- */
.label {
  font-family: var(--mono-font);
  font-size: 11px;
  letter-spacing: 1.8px;
  text-transform: uppercase;
  color: var(--mute);
  font-weight: 500;
  display: inline-block;
}

.label--strong { color: var(--fg); }

.display-xl,
.display-l,
.display-m,
.display-s {
  font-family: var(--display-font);
  color: var(--fg);
  margin: 0;
  font-stretch: 75%; /* compresses further on variable-width UIs */
}

.display-xl {
  font-weight: 900;
  font-size: clamp(64px, 15vw, 180px);
  line-height: 0.88;
  letter-spacing: -0.03em;
}

.display-l {
  font-weight: 900;
  font-size: clamp(44px, 9vw, 104px);
  line-height: 0.9;
  letter-spacing: -0.02em;
}

.display-m {
  font-weight: 800;
  font-size: clamp(32px, 5vw, 56px);
  line-height: 0.95;
  letter-spacing: -0.015em;
}

.display-s {
  font-weight: 800;
  font-size: clamp(22px, 2.8vw, 32px);
  line-height: 1.05;
  letter-spacing: -0.01em;
}

.serif-italic {
  font-family: var(--serif-font);
  font-style: italic;
  font-weight: 400;
  letter-spacing: -0.015em;
}

.body-l { font-size: clamp(17px, 1.6vw, 20px); line-height: 1.5; color: rgba(255,255,255,0.82); }
.body-m { font-size: 16px; line-height: 1.6; color: rgba(255,255,255,0.78); }
.body-s { font-size: 14px; line-height: 1.6; color: rgba(255,255,255,0.66); }

.mute { color: var(--mute); }
.strong { color: var(--fg); font-weight: 600; }

/* -------------------------------------------------------------------------
 * Masthead
 * ------------------------------------------------------------------------- */
.masthead {
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--bg);
  border-bottom: 1px solid var(--rule);
  -webkit-backdrop-filter: saturate(120%);
  backdrop-filter: saturate(120%);
}

.masthead-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  height: 56px;
}

.masthead-brand {
  font-family: var(--body-font);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 2.6px;
  color: var(--fg);
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.masthead-brand .rule {
  display: inline-block;
  width: 14px;
  height: 1px;
  background: var(--rule-strong);
}

.masthead-brand .index {
  font-family: var(--mono-font);
  font-size: 11px;
  letter-spacing: 1.6px;
  color: var(--mute);
  font-weight: 500;
}

.masthead-nav {
  display: flex;
  gap: clamp(16px, 3vw, 40px);
  font-family: var(--mono-font);
  font-size: 11px;
  letter-spacing: 1.6px;
  text-transform: uppercase;
}

.masthead-nav a {
  color: var(--mute);
  padding: 4px 0;
  border-bottom: 1px solid transparent;
}
.masthead-nav a:hover { color: var(--fg); opacity: 1; }
.masthead-nav a[aria-current="page"] { color: var(--fg); }

/* -------------------------------------------------------------------------
 * Hero
 * ------------------------------------------------------------------------- */
.hero {
  padding-top: clamp(72px, 12vh, 160px);
  padding-bottom: clamp(72px, 12vh, 160px);
}

.hero .label { margin-bottom: var(--space-lg); }
.hero .lead {
  margin-top: var(--space-lg);
  max-width: 560px;
  color: rgba(255,255,255,0.82);
}

.hero-actions {
  margin-top: var(--space-xl);
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}

/* -------------------------------------------------------------------------
 * Sections
 * ------------------------------------------------------------------------- */
.section {
  padding: var(--space-3xl) 0;
}

.section--compact {
  padding: var(--space-2xl) 0;
}

.section-head {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
  align-items: baseline;
}

@media (min-width: 820px) {
  .section-head {
    grid-template-columns: 140px 1fr;
    gap: var(--space-xl);
  }
}

.section-title { max-width: 900px; }

/* -------------------------------------------------------------------------
 * Feature grid
 * ------------------------------------------------------------------------- */
.feature-grid {
  display: grid;
  grid-template-columns: 1fr;
  border-top: 1px solid var(--rule);
}

@media (min-width: 820px) {
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
}

.feature {
  border-bottom: 1px solid var(--rule);
  padding: var(--space-xl) 0;
}

@media (min-width: 820px) {
  .feature:nth-child(odd) {
    border-right: 1px solid var(--rule);
    padding-right: var(--space-xl);
  }
  .feature:nth-child(even) { padding-left: var(--space-xl); }
}

.feature-number {
  font-family: var(--mono-font);
  font-size: 11px;
  color: var(--mute);
  letter-spacing: 1.6px;
  margin-bottom: var(--space-md);
  display: block;
}

.feature-title { margin-bottom: var(--space-sm); }

.feature p { margin: 0; }

/* -------------------------------------------------------------------------
 * Steps (process)
 * ------------------------------------------------------------------------- */
.steps {
  display: grid;
  grid-template-columns: 1fr;
  counter-reset: step;
  border-top: 1px solid var(--rule);
}

@media (min-width: 820px) {
  .steps { grid-template-columns: repeat(3, 1fr); }
}

.step {
  padding: var(--space-xl) 0;
  counter-increment: step;
  border-bottom: 1px solid var(--rule);
}

@media (min-width: 820px) {
  .step { border-bottom: none; padding: var(--space-xl); padding-left: 0; padding-right: var(--space-xl); border-right: 1px solid var(--rule); }
  .step:first-child { padding-left: 0; }
  .step:last-child { border-right: none; padding-right: 0; }
}

.step::before {
  content: counter(step, decimal-leading-zero);
  display: block;
  font-family: var(--mono-font);
  font-size: 11px;
  color: var(--mute);
  letter-spacing: 1.6px;
  margin-bottom: var(--space-md);
}

.step h3 {
  font-family: var(--display-font);
  font-weight: 800;
  font-size: clamp(24px, 3vw, 34px);
  line-height: 1;
  letter-spacing: -0.015em;
  margin: 0 0 var(--space-sm) 0;
  color: var(--fg);
}

.step p { margin: 0; color: rgba(255,255,255,0.75); }

/* -------------------------------------------------------------------------
 * Pricing plans
 * ------------------------------------------------------------------------- */
.plans {
  border-top: 1px solid var(--rule);
}

.plan {
  display: grid;
  grid-template-columns: 20px 1fr auto;
  gap: clamp(12px, 2vw, 24px);
  align-items: center;
  padding: clamp(18px, 2.5vw, 28px) 0;
  border-bottom: 1px solid var(--rule);
}

.plan-bullet {
  width: 16px;
  height: 16px;
  border: 1.5px solid var(--fg);
  box-sizing: border-box;
  position: relative;
}

.plan.featured .plan-bullet::after {
  content: '';
  position: absolute;
  inset: 3px;
  background: var(--fg);
}

.plan-info { min-width: 0; }

.plan-name {
  font-family: var(--body-font);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 1.6px;
  text-transform: uppercase;
  margin-bottom: 6px;
  color: var(--fg);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.plan-meta {
  font-size: 13px;
  color: var(--mute-strong);
  line-height: 1.4;
}

.plan-tag {
  display: inline-block;
  padding: 3px 8px 2px;
  border: 1px solid var(--fg);
  font-family: var(--mono-font);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--fg);
}

.plan-price {
  text-align: right;
  white-space: nowrap;
}

.plan-price .price {
  font-family: var(--display-font);
  font-weight: 900;
  font-size: clamp(28px, 3vw, 36px);
  letter-spacing: -0.02em;
  line-height: 1;
  color: var(--fg);
}

.plan-price .period {
  display: block;
  font-family: var(--mono-font);
  font-size: 10px;
  letter-spacing: 1.4px;
  color: var(--mute);
  margin-top: 6px;
  text-transform: uppercase;
}

.plans-footnote {
  margin-top: var(--space-lg);
  color: rgba(255,255,255,0.6);
  max-width: 640px;
}

/* -------------------------------------------------------------------------
 * Buttons
 * ------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  padding: 18px 26px;
  background: var(--fg);
  color: var(--bg);
  font-family: var(--body-font);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 1.8px;
  text-transform: uppercase;
  border: 1px solid var(--fg);
  cursor: pointer;
  user-select: none;
}

.btn:hover { opacity: 0.85; }

.btn .arrow { display: inline-block; transition: transform 180ms ease; }
.btn:hover .arrow { transform: translateX(3px); }

.btn.ghost {
  background: transparent;
  color: var(--fg);
  border-color: var(--rule-strong);
}
.btn.ghost:hover { border-color: var(--fg); opacity: 1; }

/* -------------------------------------------------------------------------
 * Footer
 * ------------------------------------------------------------------------- */
.site-footer {
  border-top: 1px solid var(--rule);
  padding: var(--space-2xl) 0 var(--space-lg) 0;
  margin-top: var(--space-2xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
}

@media (min-width: 820px) {
  .footer-grid { grid-template-columns: 2fr 1fr 1fr; gap: var(--space-lg); }
}

.footer-brand p { margin: var(--space-md) 0 0 0; max-width: 420px; }

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer-links a {
  font-family: var(--mono-font);
  font-size: 11px;
  letter-spacing: 1.6px;
  text-transform: uppercase;
  color: var(--mute);
}

.footer-links a:hover { color: var(--fg); opacity: 1; }

.footer-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-lg);
  margin-top: var(--space-xl);
  border-top: 1px solid var(--rule);
  font-family: var(--mono-font);
  font-size: 11px;
  letter-spacing: 1.6px;
  text-transform: uppercase;
  color: var(--mute);
}

/* -------------------------------------------------------------------------
 * Prose (privacy, terms)
 * ------------------------------------------------------------------------- */
.prose {
  max-width: var(--prose-width);
  margin: 0 auto;
  padding: clamp(48px, 10vh, 96px) 0 var(--space-2xl);
}

.prose > .label { margin-bottom: var(--space-md); }

.prose h1 {
  margin: 0 0 var(--space-lg) 0;
}

.prose h2 {
  font-family: var(--display-font);
  font-weight: 800;
  font-size: clamp(22px, 2.4vw, 28px);
  letter-spacing: -0.01em;
  margin: var(--space-xl) 0 var(--space-sm) 0;
  color: var(--fg);
  line-height: 1.15;
}

.prose h3 {
  font-family: var(--body-font);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  margin: var(--space-lg) 0 var(--space-xs) 0;
  color: var(--fg);
}

.prose p,
.prose ul,
.prose ol {
  margin: var(--space-sm) 0;
  color: rgba(255,255,255,0.78);
  font-size: 16px;
  line-height: 1.7;
}

.prose ul, .prose ol { padding-left: 20px; }
.prose li { margin: 6px 0; }

.prose strong { color: var(--fg); font-weight: 600; }

.prose a {
  color: var(--fg);
  border-bottom: 1px solid var(--rule-strong);
}
.prose a:hover { border-bottom-color: var(--fg); opacity: 1; }

.prose .meta-block {
  margin: var(--space-lg) 0 var(--space-xl) 0;
  padding: var(--space-md) 0;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-family: var(--mono-font);
  font-size: 11px;
  letter-spacing: 1.6px;
  text-transform: uppercase;
  color: var(--mute);
}

.prose .disclaimer {
  margin-top: var(--space-xl);
  padding-top: var(--space-md);
  border-top: 1px solid var(--rule);
  color: var(--mute);
  font-size: 13px;
}

/* -------------------------------------------------------------------------
 * FAQ
 * ------------------------------------------------------------------------- */
.faq { border-top: 1px solid var(--rule); }

.faq-item {
  border-bottom: 1px solid var(--rule);
  padding: clamp(18px, 2.5vw, 28px) 0;
}

.faq-item h3 {
  font-family: var(--body-font);
  font-weight: 600;
  font-size: clamp(17px, 1.6vw, 19px);
  margin: 0 0 var(--space-sm) 0;
  color: var(--fg);
  letter-spacing: -0.005em;
}

.faq-item p {
  margin: 0;
  color: rgba(255,255,255,0.76);
  line-height: 1.65;
  max-width: 720px;
}

.faq-item a { color: var(--fg); border-bottom: 1px solid var(--rule-strong); }
.faq-item a:hover { border-bottom-color: var(--fg); opacity: 1; }

/* -------------------------------------------------------------------------
 * Support / contact
 * ------------------------------------------------------------------------- */
.contact-block {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
  max-width: 540px;
}

/* -------------------------------------------------------------------------
 * Accessibility
 * ------------------------------------------------------------------------- */
:focus-visible {
  outline: 2px solid var(--fg);
  outline-offset: 3px;
}

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

/* -------------------------------------------------------------------------
 * Print
 * ------------------------------------------------------------------------- */
@media print {
  body { background: #fff; color: #000; }
  .masthead, .site-footer { display: none; }
  a { color: #000; }
}