/* ============================================
   PostStack — Theme CSS
   ============================================ */

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

:root {
  --bg: #FAFAF7;
  --bg-alt: #F2F1EC;
  --fg: #0F0F0F;
  --fg-muted: #6B6B6B;
  --accent: #FF6B4A;
  --accent-dark: #E8543A;
  --border: #E0DED8;
  --white: #FFFFFF;

  --font-serif: 'Instrument Serif', Georgia, serif;
  --font-sans: 'DM Sans', system-ui, sans-serif;

  --container: 1200px;
  --radius: 6px;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-sans);
  font-weight: 400;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; }

/* --- Layout --- */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 40px;
}

/* --- Navigation --- */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 48px;
  border-bottom: 1px solid var(--border);
}

.nav-logo {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  color: var(--fg);
  letter-spacing: -0.02em;
}

.nav-tagline {
  font-size: 0.8125rem;
  color: var(--fg-muted);
  font-weight: 400;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

/* --- Section Label --- */
.section-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
}

/* --- Hero --- */
.hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
  padding: 80px 48px 96px;
  max-width: 1300px;
  margin: 0 auto;
}

.hero-kicker {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--fg-muted);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 24px;
}

.hero-headline {
  font-family: var(--font-serif);
  font-size: clamp(2.5rem, 5vw, 4rem);
  line-height: 1.1;
  font-weight: 400;
  letter-spacing: -0.02em;
  color: var(--fg);
  margin-bottom: 28px;
}

.hero-headline em {
  font-style: italic;
  color: var(--accent);
}

.hero-sub {
  font-size: 1.0625rem;
  color: var(--fg-muted);
  line-height: 1.7;
  max-width: 480px;
  margin-bottom: 48px;
}

.hero-stats {
  display: flex;
  gap: 40px;
}

.stat {}

.stat-number {
  font-family: var(--font-serif);
  font-size: 1.75rem;
  color: var(--fg);
  letter-spacing: -0.02em;
}

.stat-label {
  font-size: 0.8125rem;
  color: var(--fg-muted);
  margin-top: 4px;
}

/* --- Phone Mockup --- */
.hero-visual {
  display: flex;
  justify-content: center;
}

.phone-mockup {
  width: 220px;
  background: #1A1A1A;
  border-radius: 32px;
  padding: 14px;
  box-shadow: 0 40px 80px rgba(0,0,0,0.18), 0 8px 20px rgba(0,0,0,0.12);
}

.phone-screen {
  background: #000;
  border-radius: 24px;
  overflow: hidden;
  min-height: 400px;
  display: flex;
  flex-direction: column;
}

.phone-notch {
  width: 80px;
  height: 22px;
  background: #1A1A1A;
  border-radius: 0 0 14px 14px;
  margin: 0 auto;
}

.phone-content {
  padding: 14px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.phone-header {
  display: flex;
  align-items: center;
  gap: 10px;
}

.phone-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--accent);
}

.phone-meta {}

.phone-name {
  font-size: 0.75rem;
  font-weight: 600;
  color: #fff;
}

.phone-time {
  font-size: 0.625rem;
  color: #888;
}

.phone-video-placeholder {
  width: 100%;
  aspect-ratio: 9/16;
  background: linear-gradient(135deg, #1a1a2e 0%, #2d1b3d 50%, #3d1a1a 100%);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.play-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255,255,255,0.15);
  border: 2px solid rgba(255,255,255,0.4);
  position: relative;
}

.play-icon::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 54%;
  transform: translate(-50%, -50%);
  border-style: solid;
  border-width: 7px 0 7px 11px;
  border-color: transparent transparent transparent rgba(255,255,255,0.9);
}

.phone-caption {
  font-size: 0.6875rem;
  color: #ccc;
  line-height: 1.5;
}

.hashtag { color: #4a9eff; }

.phone-reactions {
  display: flex;
  gap: 16px;
  padding: 0 4px;
}

.reaction {
  display: flex;
  align-items: center;
  gap: 4px;
}

.reaction-icon {
  width: 16px;
  height: 16px;
}

.heart-icon { background: #ff4a6e; border-radius: 50%; }
.comment-icon { background: #4a9eff; border-radius: 2px; }
.share-icon { background: #2dd085; border-radius: 2px; }

.reaction-count {
  font-size: 0.625rem;
  color: #888;
}

/* --- How Section --- */
.how {
  background: var(--fg);
  color: var(--bg);
  padding: 96px 48px;
}

.how-header {
  max-width: 700px;
  margin: 0 auto 72px;
  text-align: center;
}

.how-header h2 {
  font-family: var(--font-serif);
  font-size: clamp(1.75rem, 3.5vw, 2.75rem);
  font-weight: 400;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}

.how-sub {
  font-size: 1rem;
  color: #888;
  line-height: 1.7;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2px;
}

.service-card {
  background: #1A1A1A;
  padding: 36px 32px;
}

.service-icon {
  width: 36px;
  height: 36px;
  background: var(--accent);
  border-radius: 8px;
  margin-bottom: 20px;
}

.service-card h3 {
  font-family: var(--font-serif);
  font-size: 1.125rem;
  font-weight: 400;
  margin-bottom: 12px;
  color: var(--bg);
}

.service-card p {
  font-size: 0.875rem;
  color: #666;
  line-height: 1.65;
}

/* --- Process Section --- */
.process {
  padding: 96px 48px;
  max-width: 1100px;
  margin: 0 auto;
}

.process-header {
  margin-bottom: 64px;
}

.process-header h2 {
  font-family: var(--font-serif);
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 400;
  letter-spacing: -0.02em;
}

.process-steps {
  display: flex;
  align-items: center;
}

.step {
  flex: 1;
}

.step-number {
  font-family: var(--font-serif);
  font-size: 2.5rem;
  color: var(--accent);
  font-weight: 400;
  letter-spacing: -0.03em;
  margin-bottom: 16px;
}

.step-body h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.step-body p {
  font-size: 0.9rem;
  color: var(--fg-muted);
  line-height: 1.65;
}

.step-connector {
  width: 60px;
  height: 1px;
  background: var(--border);
  flex-shrink: 0;
  margin: 0 32px;
  align-self: flex-start;
  margin-top: 28px;
}

/* --- Pricing Section --- */
.pricing {
  background: var(--bg-alt);
  padding: 96px 48px;
}

.pricing-header {
  max-width: 600px;
  margin: 0 auto 56px;
  text-align: center;
}

.pricing-header h2 {
  font-family: var(--font-serif);
  font-size: clamp(1.75rem, 3vw, 2.75rem);
  font-weight: 400;
  letter-spacing: -0.02em;
}

.pricing-card {
  max-width: 560px;
  margin: 0 auto;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 52px 56px;
}

.pricing-amount {
  font-family: var(--font-serif);
  font-size: 3.5rem;
  letter-spacing: -0.03em;
  color: var(--fg);
  line-height: 1;
  margin-bottom: 8px;
}

.pricing-amount span {
  font-size: 1rem;
  font-family: var(--font-sans);
  font-weight: 400;
  color: var(--fg-muted);
}

.pricing-tagline {
  font-size: 0.9rem;
  color: var(--fg-muted);
  margin-bottom: 40px;
}

.pricing-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 40px;
}

.pricing-features li {
  font-size: 0.9375rem;
  color: var(--fg);
  padding-left: 24px;
  position: relative;
}

.pricing-features li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
}

.pricing-note {
  font-size: 0.8125rem;
  color: var(--fg-muted);
  border-top: 1px solid var(--border);
  padding-top: 24px;
}

/* --- Difference Section --- */
.difference {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  padding: 96px 48px;
  max-width: 1200px;
  margin: 0 auto;
  align-items: start;
}

.diff-col-left h2 {
  font-family: var(--font-serif);
  font-size: clamp(1.5rem, 2.5vw, 2.25rem);
  font-weight: 400;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 24px;
}

.diff-col-left p {
  font-size: 0.9375rem;
  color: var(--fg-muted);
  line-height: 1.7;
  margin-bottom: 16px;
}

.comparison-table {
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  font-size: 0.8125rem;
}

.comp-header {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  background: var(--fg);
  color: var(--bg);
  padding: 16px 20px;
  font-weight: 600;
}

.comp-col { text-align: center; }
.comp-col.active { color: var(--accent); }

.comp-row {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  padding: 14px 20px;
  border-top: 1px solid var(--border);
  align-items: center;
}

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

.comp-cell { text-align: center; font-weight: 500; }
.comp-cell.yes { color: #2dd085; }
.comp-cell.no { color: #ff4a6e; }
.comp-cell.partial { color: #FFB84A; }

/* --- Closing --- */
.closing {
  background: var(--accent);
  padding: 96px 48px;
  text-align: center;
}

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

.closing h2 {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4vw, 3.25rem);
  font-weight: 400;
  color: var(--white);
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin-bottom: 24px;
}

.closing p {
  font-size: 1rem;
  color: rgba(255,255,255,0.8);
  line-height: 1.7;
  margin-bottom: 40px;
}

.closing-statement {
  font-family: var(--font-serif);
  font-size: clamp(1.125rem, 2vw, 1.5rem);
  font-style: italic;
  color: rgba(255,255,255,0.95);
  letter-spacing: -0.01em;
}

/* --- FAQ --- */
.faq {
  padding: 96px 48px;
  max-width: 860px;
  margin: 0 auto;
}

.faq-heading {
  font-family: var(--font-serif);
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 400;
  letter-spacing: -0.02em;
  margin-bottom: 56px;
  color: var(--fg);
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.faq-item {
  padding: 28px 0;
  border-bottom: 1px solid var(--border);
}

.faq-item:first-child {
  border-top: 1px solid var(--border);
}

.faq-item h3 {
  font-family: var(--font-serif);
  font-size: 1.125rem;
  font-weight: 400;
  margin-bottom: 12px;
  color: var(--fg);
}

.faq-item p {
  font-size: 0.9375rem;
  color: var(--fg-muted);
  line-height: 1.7;
}

/* --- Chat Widget --- */
.chat-widget {
  position: fixed;
  bottom: 32px;
  right: 32px;
  z-index: 999;
}

.chat-trigger {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--fg);
  color: var(--white);
  text-decoration: none;
  padding: 14px 20px 14px 16px;
  border-radius: 40px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.18);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  cursor: pointer;
}

.chat-trigger:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(0,0,0,0.22);
}

.chat-icon {
  width: 36px;
  height: 36px;
  background: var(--accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.chat-label {
  font-size: 0.875rem;
  font-weight: 500;
  white-space: nowrap;
}

/* --- Primary CTA Button --- */
.cta-btn-primary {
  display: inline-block;
  background: var(--accent);
  color: var(--white);
  text-decoration: none;
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  padding: 14px 28px;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  transition: background 0.15s ease, transform 0.1s ease;
  text-align: center;
}

.cta-btn-primary:hover {
  background: var(--accent-dark);
  transform: translateY(-1px);
}

.cta-btn-primary:active {
  transform: translateY(0);
}

/* --- Closing Signup Form --- */
.closing-form-wrap {
  margin-bottom: 40px;
}

.closing-signup-form {
  max-width: 720px;
  margin: 0 auto;
}

.form-row {
  display: flex;
  gap: 12px;
  align-items: stretch;
}

.form-row input {
  flex: 1;
  min-width: 0;
  padding: 14px 18px;
  border: 1px solid rgba(255,255,255,0.35);
  border-radius: 8px;
  background: rgba(255,255,255,0.12);
  color: #fff;
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  outline: none;
  transition: border-color 0.15s ease, background 0.15s ease;
}

.form-row input::placeholder {
  color: rgba(255,255,255,0.6);
}

.form-row input:focus {
  border-color: rgba(255,255,255,0.7);
  background: rgba(255,255,255,0.18);
}

.form-row input[type="submit"],
.form-row button {
  flex: 0 0 auto;
  white-space: nowrap;
  background: var(--white);
  color: var(--accent);
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  padding: 14px 24px;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.15s ease, transform 0.1s ease;
}

.form-row input[type="submit"]:hover,
.form-row button:hover {
  background: #f0f0e8;
  transform: translateY(-1px);
}

.form-success {
  text-align: center;
  color: rgba(255,255,255,0.9);
  font-size: 0.9375rem;
  margin-top: 12px;
}

/* --- Footer --- */
.footer {
  padding: 40px 48px;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-brand {
  font-family: var(--font-serif);
  font-size: 1.125rem;
  color: var(--fg);
}

.footer-sub {
  font-size: 0.8125rem;
  color: var(--fg-muted);
}

.footer-links {
  font-size: 0.8125rem;
  color: var(--fg-muted);
}

/* --- Responsive --- */
@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
    gap: 48px;
    padding: 48px 32px 64px;
  }

  .hero-visual { display: none; }

  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .process-steps {
    flex-direction: column;
    gap: 40px;
  }

  .step-connector {
    width: 40px;
    height: 1px;
    margin: 0;
    background: var(--border);
  }

  .difference {
    grid-template-columns: 1fr;
    gap: 48px;
    padding: 64px 32px;
  }

  .how { padding: 64px 32px; }
  .process, .pricing { padding: 64px 32px; }
  .closing { padding: 64px 32px; }

  .hero-stats {
    gap: 24px;
    flex-wrap: wrap;
  }

  .comp-header, .comp-row {
    grid-template-columns: 2fr 1fr 1fr 1fr;
    font-size: 0.75rem;
  }
}

@media (max-width: 600px) {
  .services-grid {
    grid-template-columns: 1fr;
  }

  .comp-header, .comp-row {
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
  }

  .pricing-card {
    padding: 36px 28px;
  }

  .pricing-amount {
    font-size: 2.75rem;
  }

  .nav {
    padding: 20px 24px;
  }

  .footer {
    flex-direction: column;
    gap: 8px;
    padding: 32px 24px;
    text-align: center;
  }

  .faq {
    padding: 64px 32px;
  }

  .chat-label {
    display: none;
  }

  .chat-trigger {
    padding: 14px;
  }

  .form-row {
    flex-direction: column;
  }

  .form-row input[type="submit"],
  .form-row button {
    width: 100%;
  }
}