/* style.css – Climbable marketing site (staging scaffold) */

:root {
  /* Type scale – fluid clamp() */
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.75vw, 1.5rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);
  --text-2xl: clamp(2rem, 1.2rem + 2.5vw, 3.5rem);
  --text-3xl: clamp(2.5rem, 1rem + 4vw, 5rem);
  --text-hero: clamp(2.75rem, 0.5rem + 6vw, 6.5rem);

  /* Spacing – 4px system */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  --radius-sm: 0.375rem;
  --radius-md: 0.625rem;
  --radius-lg: 0.875rem;
  --radius-xl: 1.25rem;
  --radius-full: 9999px;

  --transition-interactive: 200ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Fonts – matches the Climbable app for brand continuity */
  --font-display: 'General Sans', 'Switzer', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-body: 'Switzer', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Consolas', monospace;

  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1200px;
}

/* Warm stone surfaces, forest-green accent (matches app) */
:root {
  --color-bg: #f5f2eb;
  --color-surface: #fdfaf3;
  --color-surface-2: #f0ece0;
  --color-surface-offset: #e8e2d0;
  --color-divider: #ddd7c4;
  --color-border: #cfc8b0;

  --color-text: #1a1c17;
  --color-text-muted: #616754;
  --color-text-faint: #9a9c85;
  --color-text-inverse: #f5f2eb;

  --color-primary: #2d5a27;
  --color-primary-hover: #1e3f1a;
  --color-primary-soft: #c8ddbd;

  --color-warning: #7a5c00;
  --color-warning-soft: #f0dfa0;
  --color-error: #8b2500;
  --color-error-soft: #f0cfc0;

  --shadow-sm: 0 1px 2px rgba(20, 30, 10, 0.07);
  --shadow-md: 0 4px 14px rgba(20, 30, 10, 0.11);
  --shadow-lg: 0 16px 40px rgba(20, 30, 10, 0.15);
}

/* ============ LAYOUT PRIMITIVES ============ */
.wrap {
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: var(--space-6);
}
.section {
  padding-block: clamp(var(--space-16), 9vw, var(--space-32));
  border-bottom: 1px solid var(--color-divider);
  position: relative;
}
.section:last-of-type {
  border-bottom: none;
}

/* Section scaffold label – visible marker identifying each block during staging */
.section-tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-faint);
  margin-bottom: var(--space-6);
}
.section-tag::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: var(--radius-full);
  background: var(--color-primary);
  flex-shrink: 0;
}

.section-heading {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-xl);
  letter-spacing: -0.01em;
  color: var(--color-text);
  margin-bottom: var(--space-4);
}

.section-note {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  max-width: 60ch;
}

.placeholder-block {
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  padding: var(--space-8);
  color: var(--color-text-faint);
  font-size: var(--text-sm);
}

.content-block {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  padding: var(--space-8);
  color: var(--color-text);
  font-size: var(--text-sm);
}

/* ============ HEADER ============ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 90;
  background: oklch(from var(--color-bg) l c h / 0.88);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-divider);
}
.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: var(--space-4);
}
.brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  color: var(--color-text);
}
.brand-mark {
  flex-shrink: 0;
  border-radius: 22%;
  display: block;
}
.brand-name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-lg);
  letter-spacing: -0.01em;
}
.header-nav {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}
.header-nav a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
}
.header-nav a:hover {
  color: var(--color-text);
}
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
/* ============ BUTTONS ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-md);
  text-decoration: none;
  white-space: nowrap;
}
.btn-primary {
  background: var(--color-primary);
  color: var(--color-text-inverse);
}
.btn-primary:hover {
  background: var(--color-primary-hover);
}
.btn-ghost {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border);
}
.btn-ghost:hover {
  border-color: var(--color-text-muted);
}

/* ============ HERO ============ */
.hero {
  padding-block: clamp(var(--space-20), 12vw, var(--space-32)) clamp(var(--space-16), 9vw, var(--space-24));
  text-align: center;
}
.hero-mark {
  margin-inline: auto;
  margin-bottom: var(--space-8);
  border-radius: 22%;
  display: block;
}
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-primary);
  background: var(--color-primary-soft);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-6);
}
.hero-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-hero);
  letter-spacing: -0.02em;
  line-height: 1.05;
  color: var(--color-text);
  max-width: min(22ch, 90vw);
  margin-inline: auto;
  margin-bottom: var(--space-6);
}
@media (min-width: 640px) {
  .hero-title {
    max-width: min(26ch, 90vw);
  }
}
@media (min-width: 1024px) {
  .hero-title {
    max-width: min(34ch, 85vw);
  }
}
.hero-sub {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 52ch;
  margin-inline: auto;
  margin-bottom: var(--space-10);
}
.hero-cta-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  flex-wrap: wrap;
  margin-bottom: var(--space-12);
}
.hero-proof {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text-faint);
  font-family: var(--font-mono);
}
.hero-proof span:not(:last-child)::after {
  content: '·';
  margin-left: var(--space-3);
  color: var(--color-border);
}

/* ============ SECTION GRID VARIANTS (structural only) ============ */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: center;
}
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}
.steps-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
  counter-reset: step;
}
.step-block {
  position: relative;
  padding-top: var(--space-16);
}
.step-block::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  top: 0;
  left: 0;
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--color-primary);
}
.scores-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
}
.scores-grid .content-block {
  padding: var(--space-6);
}
.score-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.score-icon {
  color: var(--color-primary);
  flex-shrink: 0;
}
.score-title {
  font-weight: 600;
  font-size: var(--text-base);
  color: var(--color-text);
  margin: 0;
}
.score-desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted, var(--color-text));
  opacity: 0.85;
  line-height: 1.5;
  margin: 0;
}
.coverage-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
}

/* Coverage map */
.coverage-map-wrap {
  position: relative;
  max-width: 640px;
  margin: 0 auto;
}
.coverage-map {
  width: 100%;
  height: auto;
  display: block;
  overflow: visible;
}
.map-state {
  stroke: var(--color-bg);
  stroke-width: 0.6;
  stroke-linejoin: round;
  transition: fill 0.15s ease, opacity 0.15s ease;
}
.map-state--covered {
  fill: var(--color-primary);
  opacity: 0.75;
  cursor: pointer;
}
.map-state--covered:hover,
.map-state--covered:focus-visible {
  opacity: 1;
  fill: var(--color-primary-hover, var(--color-primary));
}
.map-state--uncovered {
  fill: var(--color-border);
  opacity: 0.5;
  cursor: pointer;
}
.map-state--uncovered:hover,
.map-state--uncovered:focus-visible {
  opacity: 0.8;
}
.coverage-map-tooltip {
  position: absolute;
  pointer-events: none;
  left: 0;
  top: 0;
  transform: translate(-50%, calc(-100% - 12px));
  background: var(--color-text);
  color: var(--color-bg);
  border-radius: var(--radius-md, 8px);
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  line-height: 1.4;
  width: 280px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.18);
  z-index: 5;
  white-space: normal;
}
.coverage-map-tooltip--below {
  transform: translate(-50%, 12px);
}
.coverage-map-tooltip[hidden] {
  display: none;
}
.coverage-map-tooltip-state {
  display: block;
  font-weight: 600;
}
.coverage-map-tooltip-count {
  display: block;
  color: var(--color-primary-soft, var(--color-bg));
  opacity: 0.85;
}
.coverage-map-tooltip-note {
  display: block;
  opacity: 0.75;
  white-space: normal;
  margin-top: 2px;
}
.coverage-map-tooltip-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  list-style: none;
  margin: var(--space-2) 0 0;
  padding: 0;
}
.coverage-map-tooltip-list:empty {
  display: none;
}
.coverage-map-tooltip-list li {
  background: rgba(255, 255, 255, 0.14);
  border-radius: 999px;
  padding: 3px 10px;
  font-size: var(--text-xs, 0.75rem);
  line-height: 1.3;
  opacity: 0.95;
}
.coverage-map-legend {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  justify-content: center;
  margin-top: var(--space-4);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}
.coverage-map-legend-swatch {
  display: inline-block;
  width: 12px;
  height: 12px;
  border-radius: 3px;
}
@media (max-width: 640px) {
  .coverage-map-tooltip {
    white-space: normal;
  }
}
.tier-compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
}
.tier-feature-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.tier-feature-list li {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.5;
  padding-left: var(--space-4);
  border-left: 1px solid var(--color-border);
}
.tier-feature-list li strong {
  color: var(--color-text);
  font-weight: 600;
}

@media (max-width: 860px) {
  .grid-2,
  .grid-3,
  .steps-row,
  .scores-grid,
  .coverage-list,
  .tier-compare {
    grid-template-columns: 1fr;
  }
  .header-nav {
    display: none;
  }
}

/* ============ FOOTER ============ */
.site-footer {
  padding-block: var(--space-16) var(--space-10);
}
.footer-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-8);
  flex-wrap: wrap;
  margin-bottom: var(--space-10);
}
.footer-cta-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-xl);
  max-width: 20ch;
}
.footer-links {
  display: flex;
  gap: var(--space-12);
  flex-wrap: wrap;
}
.footer-links-group h4 {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-faint);
  margin-bottom: var(--space-3);
}
.footer-links-group ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.footer-links-group a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
}
.footer-links-group a:hover {
  color: var(--color-text);
}
.footer-bottom {
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-divider);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-3);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

/* ============ Screenshot frame component ============ */
.screenshot-frame {
  position: relative;
  width: 100%;
  max-width: 320px;
  margin: 0 auto;
}
.screenshot-frame img {
  display: block;
  width: 100%;
  height: auto;
}
.phone-compare-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
  align-items: end;
  max-width: 560px;
  margin: 0 auto;
}
.phone-compare-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
}
.phone-compare-label {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-faint);
  font-weight: 600;
  text-align: center;
}
.phone-compare-label.is-brand {
  color: var(--color-primary);
}
@media (max-width: 640px) {
  .phone-compare-row {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4);
  }
  .screenshot-frame {
    max-width: 100%;
  }
}
.problem-cta-row {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  margin-top: var(--space-10);
}
.problem-cta-app {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-base);
}
.feature-phone-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: center;
  margin-top: var(--space-10);
}
.feature-phone-grid-frame {
  width: 100%;
}
.feature-phone-grid-frame .screenshot-frame {
  max-width: 264px;
}
.feature-phone-grid.is-reverse .feature-phone-grid-copy {
  order: 2;
}
.feature-phone-grid.is-reverse .feature-phone-grid-frame {
  order: 1;
}
@media (max-width: 800px) {
  .feature-phone-grid,
  .feature-phone-grid.is-reverse .feature-phone-grid-copy,
  .feature-phone-grid.is-reverse .feature-phone-grid-frame {
    grid-template-columns: 1fr;
    order: initial;
  }
  .feature-phone-grid {
    display: flex;
    flex-direction: column;
    gap: var(--space-8);
  }
  .feature-phone-grid-frame {
    width: 100%;
    flex: none;
  }
}