/* ============================================
   MailBuddy Landing Page
   ============================================ */

:root {
  --color-primary: #030213;
  --color-on-primary: #FFFFFF;
  --color-surface: #FFFFFF;
  --color-surface-alt: #F8F9FB;
  --color-surface-variant: #ECECF0;
  --color-text: #030213;
  --color-text-secondary: #5A5A6E;
  --color-text-tertiary: #8E8EA0;
  --color-border: #E5E5EC;
  --color-link: #069AF3;

  --brand-accent: #030213;
  --brand-accent-hover: #1a1a2e;
  --brand-accent-light: #717182;
  --brand-teal: #075056;

  --color-success: #2CA01C;
  --color-info: #069AF3;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.1);
  --shadow-xl: 0 20px 60px rgba(0,0,0,0.12);

  --radius-sm: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;

  --font: 'Inter', system-ui, -apple-system, sans-serif;
  --max-width: 72rem;
  --nav-height: 4rem;
}

/* ============================================
   Font Faces
   ============================================ */

@font-face { font-family: 'Mozaic GEO'; src: url('../assets/fonts/mozaic_geo_regular.ttf') format('truetype'); font-weight: 400; font-display: swap; }
@font-face { font-family: 'Mozaic GEO'; src: url('../assets/fonts/mozaic_geo_medium.ttf') format('truetype'); font-weight: 500; font-display: swap; }
@font-face { font-family: 'Mozaic GEO'; src: url('../assets/fonts/mozaic_geo_semibold.ttf') format('truetype'); font-weight: 600; font-display: swap; }
@font-face { font-family: 'Mozaic GEO'; src: url('../assets/fonts/mozaic_geo_bold.ttf') format('truetype'); font-weight: 700; font-display: swap; }

/* ============================================
   Reset
   ============================================ */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  overflow-x: hidden;
}

body {
  font-family: var(--font);
  font-weight: 400;
  color: var(--color-text);
  background: var(--color-surface);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  overflow-y: auto;
  overflow-x: hidden;
}

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

body.nav-open { overflow: hidden; }

a { color: var(--color-text-secondary); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--color-text); }

.container { width: 100%; max-width: var(--max-width); margin: 0 auto; padding: 0 1.5rem; }
.hide-mobile { display: none; }
@media (min-width: 48em) { .hide-mobile { display: inline; } }

/* ============================================
   Buttons
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font);
  font-weight: 600;
  font-size: 0.9375rem;
  padding: 0.625rem 1.25rem;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
  white-space: nowrap;
}

.btn-sm { padding: 0.5rem 1rem; font-size: 0.8125rem; }
.btn-lg { padding: 0.875rem 1.75rem; font-size: 1rem; }

.btn-primary {
  background: var(--color-primary);
  color: var(--color-on-primary);
}
.btn-primary:hover { background: var(--brand-accent-hover); color: #fff; box-shadow: var(--shadow-md); }

.btn-cta {
  background: var(--color-primary);
  color: #fff;
  box-shadow: 0 2px 8px rgba(3,2,19,0.25);
}
.btn-cta:hover { background: var(--brand-accent-hover); color: #fff; box-shadow: 0 4px 16px rgba(3,2,19,0.3); transform: translateY(-1px); }

.btn-secondary {
  background: transparent;
  color: var(--color-primary);
  border: 1.5px solid var(--color-border);
}
.btn-secondary:hover { border-color: var(--color-primary); color: var(--color-primary); }

.btn-ghost {
  background: transparent;
  color: var(--color-text-secondary);
  border: 1.5px solid var(--color-border);
}
.btn-ghost:hover { border-color: var(--color-text-secondary); color: var(--color-text); }

.btn-arrow { transition: transform 0.2s; }
.btn:hover .btn-arrow { transform: translateX(3px); }

/* ============================================
   Coming Soon Banner
   ============================================ */

.coming-soon-banner {
  background: var(--color-primary);
  color: #fff;
  text-align: center;
  padding: 0.5rem 1rem;
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 110;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.banner-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #fff;
  animation: blink 2s ease-in-out infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

.has-banner { --banner-height: 2rem; }
.has-banner .nav { top: var(--banner-height); }
.has-banner .hero { padding-top: calc(var(--nav-height) + var(--banner-height) + 5rem); }
.has-banner .legal-page { padding-top: calc(var(--nav-height) + var(--banner-height) + 3rem); }

/* ============================================
   Navigation
   ============================================ */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  height: var(--nav-height);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  color: var(--color-primary);
  font-weight: 700;
  font-size: 1.125rem;
  letter-spacing: -0.01em;
}
.nav-logo:hover { color: var(--color-primary); }
.nav-logo svg { width: 1.75rem; height: 1.75rem; flex-shrink: 0; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  color: var(--color-text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  transition: color 0.15s;
}
.nav-links a:hover { color: var(--color-text); }

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  min-width: 2.75rem;
  min-height: 2.75rem;
  align-items: center;
  justify-content: center;
}

.nav-toggle span {
  display: block; width: 1.25rem; height: 2px; background: var(--color-text); position: relative; transition: 0.3s;
}
.nav-toggle span::before, .nav-toggle span::after {
  content: ''; position: absolute; width: 100%; height: 2px; background: var(--color-text); transition: 0.3s;
}
.nav-toggle span::before { top: -6px; }
.nav-toggle span::after { top: 6px; }
.nav-toggle.open span { background: transparent; }
.nav-toggle.open span::before { top: 0; transform: rotate(45deg); }
.nav-toggle.open span::after { top: 0; transform: rotate(-45deg); }

/* ============================================
   Hero
   ============================================ */

.hero {
  padding: calc(var(--nav-height) + 5rem) 0 2rem;
  text-align: center;
  background: linear-gradient(180deg, var(--color-surface) 0%, var(--color-surface-alt) 100%);
}

.hero-badge {
  display: inline-block;
  background: var(--color-surface-variant);
  color: var(--color-text-secondary);
  font-size: 0.8125rem;
  font-weight: 600;
  padding: 0.375rem 1rem;
  border-radius: 2rem;
  margin-bottom: 1.5rem;
  letter-spacing: 0.01em;
  border: 1px solid var(--color-border);
}

.hero h1 {
  font-size: clamp(2.25rem, 6vw, 4rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 1.25rem;
}

.gradient-text {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--brand-accent-light) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-sub {
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  color: var(--color-text-secondary);
  max-width: 34rem;
  margin: 0 auto 2rem;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 4rem;
}

/* App mockup */
.hero-visual { max-width: 52rem; margin: 0 auto; }

.hero-mockup {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  overflow: hidden;
}

.mockup-bar {
  display: flex;
  gap: 6px;
  padding: 0.75rem 1rem;
  background: var(--color-surface-alt);
  border-bottom: 1px solid var(--color-border);
}

.mockup-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-border);
}

.mockup-body { display: flex; min-height: 280px; }

.mockup-sidebar {
  width: 3.5rem;
  background: var(--color-surface-alt);
  border-right: 1px solid var(--color-border);
  padding: 1rem 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.mockup-nav-item {
  height: 2rem;
  border-radius: 6px;
  background: var(--color-border);
  opacity: 0.5;
}
.mockup-nav-item.active { background: var(--color-primary); opacity: 1; }

.mockup-content { flex: 1; padding: 1.5rem; }

.mockup-header-block {
  height: 1.5rem;
  width: 40%;
  background: var(--color-surface-variant);
  border-radius: 6px;
  margin-bottom: 1.25rem;
}

.mockup-cards { display: flex; gap: 0.75rem; margin-bottom: 1.25rem; }

.mockup-card {
  flex: 1;
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 1rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.mockup-card-icon { width: 2rem; height: 2rem; border-radius: 6px; flex-shrink: 0; }
.mc-dark { background: rgba(3,2,19,0.1); }
.mc-blue { background: rgba(6,154,243,0.15); }
.mc-green { background: rgba(44,160,28,0.15); }

.mockup-card-lines { flex: 1; display: flex; flex-direction: column; gap: 6px; }
.mcl { height: 8px; background: var(--color-surface-variant); border-radius: 4px; }
.mcl.short { width: 60%; }

.mockup-table { display: flex; flex-direction: column; gap: 6px; }
.mockup-row { height: 2rem; background: var(--color-surface-alt); border-radius: 6px; border: 1px solid var(--color-border); }

/* ============================================
   Section Headings
   ============================================ */

.section-label {
  display: inline-block;
  color: var(--color-text-secondary);
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.75rem;
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.025em;
  line-height: 1.15;
  margin-bottom: 0.75rem;
}

.section-sub {
  color: var(--color-text-secondary);
  font-size: 1.0625rem;
  max-width: 32rem;
  line-height: 1.6;
}

/* ============================================
   Features
   ============================================ */

.features {
  padding: 6rem 0;
  text-align: center;
}

.features .section-sub { margin: 0 auto 3.5rem; }

.features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

.feature-card {
  text-align: left;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 2rem;
  transition: all 0.25s ease;
}

.feature-card:hover {
  border-color: transparent;
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.feature-icon {
  width: 3rem;
  height: 3rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  margin-bottom: 1.25rem;
  background: var(--icon-bg);
  color: var(--icon-color);
}

.feature-card h3 {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  letter-spacing: -0.01em;
}

.feature-card p {
  color: var(--color-text-secondary);
  font-size: 0.9375rem;
  line-height: 1.65;
}

/* ============================================
   Integrations
   ============================================ */

.integrations {
  padding: 6rem 0;
  background: var(--color-surface-alt);
}

.integrations-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  align-items: center;
}

.integrations-text .section-sub { margin-bottom: 1.5rem; }

.integration-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem 1.5rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: all 0.2s ease;
}

.integration-card:hover {
  box-shadow: var(--shadow-md);
  border-color: transparent;
}

.integration-card + .integration-card { margin-top: 0.75rem; }

.integration-logo { flex-shrink: 0; }
.integration-logo svg { border-radius: 8px; }

.integration-info { flex: 1; }
.integration-info h3 { font-size: 1rem; font-weight: 700; margin-bottom: 0.25rem; letter-spacing: -0.01em; }
.integration-info p { font-size: 0.875rem; color: var(--color-text-secondary); line-height: 1.5; }

.integration-check {
  flex-shrink: 0;
  width: 1.75rem;
  height: 1.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(44,160,28,0.1);
  color: var(--color-success);
  border-radius: 50%;
  font-size: 0.8125rem;
  font-weight: 700;
}

.integration-card--qb {
  flex-direction: column;
  gap: 0;
}

.integration-card-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  width: 100%;
}

.c2qb-btn {
  display: inline-block;
  margin-top: 1rem;
  align-self: flex-start;
  border-radius: 4px;
  transition: opacity 0.2s;
  line-height: 0;
}
.c2qb-btn:hover img {
  content: url('../img/C2QB_green_btn_med_hover.png');
}

/* ============================================
   CTA Section
   ============================================ */

.cta-section { padding: 6rem 0; }

.cta-box {
  text-align: center;
  background: var(--color-primary);
  color: #fff;
  border-radius: var(--radius-xl);
  padding: clamp(3rem, 6vw, 5rem) 2rem;
}

.cta-box h2 {
  font-size: clamp(1.5rem, 3.5vw, 2.25rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 0.75rem;
}

.cta-box p {
  color: rgba(255,255,255,0.65);
  font-size: 1.0625rem;
  margin-bottom: 2rem;
  max-width: 28rem;
  margin-left: auto;
  margin-right: auto;
}

.cta-box .btn-cta {
  background: #fff;
  color: var(--color-primary);
  box-shadow: 0 2px 8px rgba(255,255,255,0.2);
}
.cta-box .btn-cta:hover {
  background: var(--color-surface-variant);
  color: var(--color-primary);
  box-shadow: 0 4px 16px rgba(255,255,255,0.25);
}

/* ============================================
   Footer
   ============================================ */

.footer {
  padding: 4rem 0 2rem;
  background: var(--color-surface-alt);
  border-top: 1px solid var(--color-border);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 2rem;
}

.footer-brand { max-width: 16rem; }

.footer-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-text);
  font-weight: 700;
  font-size: 1rem;
  margin-bottom: 0.75rem;
}
.footer-logo svg { width: 1.25rem; height: 1.25rem; }

.footer-tagline { color: var(--color-text-tertiary); font-size: 0.875rem; }

.footer-nav { display: flex; gap: 4rem; }

.footer-col h4 {
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-tertiary);
  margin-bottom: 1rem;
}

.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 0.625rem; }
.footer-col a { color: var(--color-text-secondary); font-size: 0.875rem; }
.footer-col a:hover { color: var(--color-text); }

.footer-bottom {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
  text-align: center;
  font-size: 0.8125rem;
  color: var(--color-text-tertiary);
}

/* ============================================
   Legal Pages
   ============================================ */

.legal-page {
  padding: calc(var(--nav-height) + 3rem) 0 4rem;
  max-width: 48rem;
  margin: 0 auto;
}

.legal-page h1 { font-size: clamp(1.5rem, 3vw, 2rem); font-weight: 800; margin-bottom: 0.5rem; letter-spacing: -0.02em; }
.legal-page .last-updated { font-size: 0.875rem; color: var(--color-text-tertiary); margin-bottom: 2.5rem; }
.legal-page h2 { font-size: 1.25rem; font-weight: 700; margin-top: 2rem; margin-bottom: 0.5rem; }
.legal-page p, .legal-page ul { margin-bottom: 1rem; color: var(--color-text-secondary); line-height: 1.7; }
.legal-page ul { padding-left: 1.5rem; }
.legal-page li { margin-bottom: 0.25rem; }

.placeholder-notice {
  background: #FEF3C7;
  border-left: 4px solid #F59E0B;
  padding: 1rem 1.25rem;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin-bottom: 2rem;
  font-size: 0.875rem;
  color: #92400E;
}

/* ============================================
   Pricing
   ============================================ */

.pricing { padding: 6rem 0; }

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr));
  gap: 1.25rem;
  max-width: 64rem;
  margin: 0 auto;
}

.pricing-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  transition: all 0.25s ease;
}
.pricing-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-2px); }

.pricing-card.featured { border-color: var(--color-primary); position: relative; }
.pricing-card.featured::before {
  content: 'Popular';
  position: absolute;
  top: -0.75rem;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-primary);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.25rem 0.75rem;
  border-radius: 1rem;
}

.pricing-tier { font-size: 0.75rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.06em; color: var(--color-text-tertiary); margin-bottom: 0.25rem; }
.pricing-name { font-size: 1.25rem; font-weight: 700; margin-bottom: 1rem; }
.pricing-price { margin-bottom: 1rem; }
.pricing-amount { font-size: 2.5rem; font-weight: 800; line-height: 1; }
.pricing-currency { font-size: 1rem; font-weight: 500; vertical-align: super; }
.pricing-period { font-size: 0.875rem; color: var(--color-text-tertiary); }
.pricing-quota { font-size: 0.875rem; color: var(--color-text-secondary); padding-bottom: 1rem; border-bottom: 1px solid var(--color-border); margin-bottom: 1rem; }
.pricing-features { list-style: none; flex: 1; margin-bottom: 1.5rem; }
.pricing-features li { font-size: 0.875rem; padding: 0.25rem 0; color: var(--color-text-secondary); display: flex; align-items: flex-start; gap: 0.5rem; }
.pricing-features li::before { content: '\2713'; color: var(--color-success); font-weight: 700; flex-shrink: 0; }
.pricing-card .btn { width: 100%; }

.pricing-skeleton { display: grid; grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr)); gap: 1.25rem; max-width: 64rem; margin: 0 auto; }
.skeleton-card { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: 2rem; min-height: 20rem; }
.skeleton-line { height: 1rem; background: var(--color-surface-variant); border-radius: 4px; margin-bottom: 0.5rem; animation: pulse 1.5s ease-in-out infinite; }
.skeleton-line.short { width: 40%; }
.skeleton-line.medium { width: 60%; }
.skeleton-line.tall { height: 2.5rem; width: 50%; margin-bottom: 1rem; }

@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.4; } }

.pricing-error { text-align: center; padding: 3rem; color: var(--color-text-secondary); }
.pricing-error p { margin-bottom: 1rem; }

/* ============================================
   Responsive: Mobile (< 640px)
   ============================================ */

@media (max-width: 39.999em) {
  .nav-links {
    display: none !important;
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    height: calc(100vh - var(--nav-height));
    background: #fff;
    flex-direction: column;
    align-items: stretch;
    padding: 2rem;
    gap: 1.5rem;
    border-top: 1px solid var(--color-border);
    z-index: 200;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
  }
  .has-banner .nav-links {
    top: calc(var(--nav-height) + var(--banner-height));
    height: calc(100vh - var(--nav-height) - var(--banner-height));
  }
  .nav-links.open { display: flex !important; }
  .nav-links a { font-size: 1.125rem; padding: 0.5rem 0; }
  .nav-toggle { display: flex; }

  .hero h1 { font-size: 2rem; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-actions .btn { justify-content: center; }

  .mockup-sidebar { display: none; }
  .mockup-cards { flex-direction: column; }

  .features-grid { grid-template-columns: 1fr; }
  .pricing-grid, .pricing-skeleton { grid-template-columns: 1fr; }

  .footer-inner { flex-direction: column; }
  .footer-nav { gap: 2rem; }
}

/* ============================================
   Responsive: Tablet (640px+)
   ============================================ */

@media (min-width: 40em) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .integrations-layout { grid-template-columns: 1fr 1fr; gap: 4rem; }
}

/* ============================================
   Responsive: Desktop (1024px+)
   ============================================ */

@media (min-width: 64em) {
  .features-grid { grid-template-columns: repeat(4, 1fr); }
}