/* Closa Landing — Editorial Design System */
:root {
  /* Colors — warm editorial palette */
  --bg: #fffcf7;
  --bg-alt: #fcf9f3;
  --bg-elevated: #f6f4ec;
  --bg-highest: #eae9de;
  --surface-white: #ffffff;
  --ink: #383831;
  --ink-soft: #64655d;
  --ink-muted: #818178;
  --outline-light: rgba(186, 186, 176, 0.4);
  --primary: #5f5e5e;
  --primary-hover: #535252;
  --secondary: #7d5f3c;
  --secondary-hover: #6f5331;
  --on-light: #ffffff;
  --error: #a64542;
  --success: #7d5f3c;

  /* Spacing — 4pt grid, editorial bias toward large */
  --sp-xs: 8px;
  --sp-sm: 12px;
  --sp-md: 16px;
  --sp-lg: 24px;
  --sp-xl: 32px;
  --sp-2xl: 48px;
  --sp-3xl: 64px;
  --sp-4xl: 80px;
  --sp-5xl: 128px;

  /* Page gutter */
  --gutter: 64px;

  /* Radius — architectural, not bubbly */
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;

  /* Shadows — editorial, ambient */
  --shadow-editorial: 0 40px 80px -20px rgba(56, 56, 49, 0.04);
  --shadow-btn: 0 2px 8px rgba(56, 56, 49, 0.1);
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-wrap: break-word;
  word-break: break-word;
}

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--ink);
}

/* ─── Header ─── */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
  padding: 0 var(--gutter);
  padding-top: env(safe-area-inset-top);
  background: rgba(255, 252, 247, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--sp-sm);
  text-decoration: none;
  color: var(--ink);
}

.logo img {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
}

.logo span {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.04em;
}

/* ─── Hero ─── */
.hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 200px var(--gutter) var(--sp-5xl);
  max-width: 1000px;
  margin: 0 auto;
}

.headline {
  font-size: clamp(2.25rem, 7vw, 4.5rem);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.04em;
  margin-bottom: var(--sp-xl);
}

.subline {
  font-size: clamp(1.0625rem, 2.5vw, 1.25rem);
  line-height: 1.7;
  color: var(--ink-soft);
  margin-bottom: var(--sp-2xl);
  max-width: 640px;
}

/* ─── Email Form ─── */
.email-form {
  width: 100%;
  max-width: 520px;
  margin-bottom: var(--sp-md);
}

.hp-field {
  position: absolute;
  left: -9999px;
  opacity: 0;
  height: 0;
  width: 0;
}

.email-input-row {
  display: flex;
  gap: var(--sp-md);
  align-items: stretch;
}

.email-input-row input[type="email"] {
  flex: 1;
  padding: var(--sp-md) 0;
  border: none;
  border-bottom: 1px solid var(--outline-light);
  background: transparent;
  font-family: inherit;
  font-size: 1.125rem;
  color: var(--ink);
  outline: none;
  transition: border-color 0.3s;
}

.email-input-row input[type="email"]:focus {
  border-bottom-color: var(--secondary);
}

.email-input-row input[type="email"]::placeholder {
  color: var(--ink-muted);
}

.email-input-row button {
  padding: var(--sp-md) var(--sp-xl);
  background: var(--primary);
  color: var(--on-light);
  border: none;
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.3s, box-shadow 0.3s;
  box-shadow: var(--shadow-btn);
}

.email-input-row button:hover {
  background: var(--primary-hover);
}

.email-input-row button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.email-msg {
  margin-top: var(--sp-sm);
  font-size: 0.875rem;
  min-height: 1.5em;
}

.email-msg--success {
  color: var(--success);
}

.email-msg--info {
  color: var(--secondary);
}

.email-msg--error {
  color: var(--error);
}

.sub {
  margin-top: var(--sp-lg);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ink-soft);
  opacity: 0.7;
}

/* ─── Value Section ─── */
.value-section {
  padding: var(--sp-5xl) var(--gutter);
  background: var(--bg-alt);
}

.value-inner {
  max-width: 1280px;
  margin: 0 auto;
}

.value-title {
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: var(--sp-4xl);
}

.pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-2xl);
}

.pillar {
  display: flex;
  flex-direction: column;
  gap: var(--sp-lg);
  padding: var(--sp-xl);
  background: var(--surface-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-editorial);
}

.pillar-icon {
  color: var(--secondary);
  font-size: 1.875rem;
}

.pillar-icon .material-symbols-outlined {
  font-size: 1.875rem;
}

.pillar-title {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.pillar-copy {
  font-size: 0.9375rem;
  line-height: 1.65;
  color: var(--ink-soft);
}

/* ─── Before / After ─── */
.comparison-section {
  padding: var(--sp-5xl) var(--gutter);
  max-width: 1280px;
  margin: 0 auto;
}

.comparison {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-3xl);
  align-items: stretch;
}

.comparison-col {
  display: flex;
  flex-direction: column;
}

.comparison-header {
  margin-bottom: var(--sp-2xl);
}

.comparison-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--sp-md);
}

.comparison-without .comparison-label {
  color: var(--error);
}

.comparison-with .comparison-label {
  color: var(--secondary);
}

.comparison-heading {
  font-size: clamp(1.5rem, 3vw, 1.875rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.comparison-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--sp-xl);
}

.comparison-list li {
  display: flex;
  align-items: flex-start;
  gap: var(--sp-md);
  font-size: 0.9375rem;
  line-height: 1.6;
}

.comparison-without .comparison-list li {
  color: var(--ink-soft);
}

.comparison-with .comparison-list li {
  color: var(--ink);
  font-weight: 500;
}

.comparison-icon {
  flex-shrink: 0;
  margin-top: 2px;
}

.comparison-without .comparison-icon {
  color: var(--error);
}

.comparison-with .comparison-icon {
  color: var(--secondary);
}

.comparison-with {
  padding: var(--sp-2xl);
  background: var(--bg-elevated);
  border-left: 4px solid var(--secondary);
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
}

/* ─── Final CTA ─── */
.final-cta {
  padding: var(--sp-5xl) var(--gutter);
  text-align: center;
  background: var(--bg-highest);
}

.final-cta-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: var(--sp-xl);
}

.final-cta-btn {
  display: inline-block;
  padding: var(--sp-lg) var(--sp-2xl);
  background: var(--secondary);
  color: var(--on-light);
  border: none;
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: 1.125rem;
  font-weight: 700;
  cursor: pointer;
  text-decoration: none;
  transition: opacity 0.3s;
  box-shadow: 0 4px 16px rgba(125, 95, 60, 0.2);
}

.final-cta-btn:hover {
  opacity: 0.9;
}

/* ─── Footer ─── */
.footer {
  padding: var(--sp-3xl) var(--gutter);
  background: var(--bg-alt);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1280px;
  margin: 0 auto;
  gap: var(--sp-xl);
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: var(--sp-xs);
}

.footer-brand-name {
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: -0.04em;
  color: var(--ink);
}

.footer-tagline {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ink-soft);
}

.footer-links {
  display: flex;
  gap: var(--sp-xl);
}

.footer-links a {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ink-soft);
  text-decoration: none;
  transition: color 0.2s;
}

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

/* ─── Responsive — tablet ─── */
@media (max-width: 768px) {
  :root {
    --gutter: 32px;
  }

  .header {
    height: 64px;
  }

  .hero {
    padding: 140px var(--gutter) var(--sp-4xl);
  }

  .pillars {
    grid-template-columns: 1fr;
    gap: var(--sp-md);
  }

  .comparison {
    grid-template-columns: 1fr;
    gap: var(--sp-xl);
  }

  .comparison-with {
    border-left: none;
    border-top: 4px solid var(--secondary);
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
  }

  .value-section,
  .comparison-section,
  .final-cta {
    padding: var(--sp-4xl) var(--gutter);
  }

  .footer-inner {
    flex-direction: column;
    text-align: center;
  }

  .footer-links {
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--sp-md);
  }
}

/* ─── Responsive — mobile ─── */
@media (max-width: 480px) {
  :root {
    --gutter: 24px;
  }

  .header {
    height: 56px;
    padding: 0 var(--gutter);
    padding-top: env(safe-area-inset-top);
  }

  .logo span {
    font-size: 1.25rem;
  }

  .hero {
    padding: 120px var(--gutter) var(--sp-3xl);
  }

  .email-input-row {
    flex-direction: column;
  }

  .email-input-row input[type="email"] {
    padding: var(--sp-md);
    border: 1px solid var(--outline-light);
    border-radius: var(--radius-md);
    font-size: 1rem;
  }

  .email-input-row input[type="email"]:focus {
    border-color: var(--secondary);
  }

  .email-input-row button {
    width: 100%;
    padding: var(--sp-md) var(--sp-lg);
    font-size: 1rem;
  }

  .comparison-heading {
    font-size: 1.375rem;
  }

  .comparison-with {
    padding: var(--sp-lg);
  }

  .value-title {
    margin-bottom: var(--sp-2xl);
  }

  .pillar {
    padding: var(--sp-lg);
  }

  .final-cta-btn {
    width: 100%;
    text-align: center;
  }

  .footer {
    padding: var(--sp-2xl) var(--gutter);
    padding-bottom: max(var(--sp-2xl), env(safe-area-inset-bottom));
  }
}

/* ─── Responsive — small screens (iPhone SE) ─── */
@media (max-width: 360px) {
  :root {
    --gutter: 20px;
  }

  .headline {
    font-size: 2rem;
  }

  .subline {
    font-size: 0.9375rem;
  }
}