/* ══════════════════════════════════════════════════════════════════
   MarkBridge – Landing Page Styles
   ══════════════════════════════════════════════════════════════════ */

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

:root {
  --color-primary: #0052CC;
  --color-primary-dark: #0747A6;
  --color-primary-light: #4C9AFF;
  --color-primary-bg: #E6F0FF;
  --color-text: #172B4D;
  --color-text-secondary: #505F79;
  --color-text-muted: #6B778C;
  --color-bg: #FFFFFF;
  --color-bg-subtle: #F4F5F7;
  --color-bg-muted: #FAFBFC;
  --color-border: #EBECF0;
  --color-border-strong: #DFE1E5;
  --color-success: #36B37E;
  --color-danger: #FF5630;
  --color-warning: #FF8B00;
  --color-purple: #6554C0;
  --color-teal: #00B8D9;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08), 0 2px 4px rgba(0,0,0,0.04);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.1), 0 4px 12px rgba(0,0,0,0.05);
  --shadow-xl: 0 20px 60px rgba(0,0,0,0.12), 0 8px 20px rgba(0,0,0,0.06);
  --transition: 0.2s ease;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  overflow-x: hidden;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--color-primary-dark);
}

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

/* ─── Container ───────────────────────────────────────────────── */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ─── Buttons ─────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: none;
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
  white-space: nowrap;
}

.btn-lg {
  padding: 14px 28px;
  font-size: 16px;
  border-radius: var(--radius-md);
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
  box-shadow: 0 2px 8px rgba(0,82,204,0.3);
}

.btn-primary:hover {
  background: var(--color-primary-dark);
  color: #fff;
  box-shadow: 0 4px 16px rgba(0,82,204,0.4);
  transform: translateY(-1px);
}

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

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.btn-outline:hover {
  background: var(--color-primary-bg);
  color: var(--color-primary-dark);
  transform: translateY(-1px);
}

.btn-full {
  width: 100%;
}

.btn-emoji {
  font-size: 18px;
  line-height: 1;
}

/* ─── Navigation ──────────────────────────────────────────────── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: all 0.3s ease;
}

.nav.scrolled {
  border-bottom-color: var(--color-border);
  box-shadow: var(--shadow-sm);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  color: var(--color-text);
  text-decoration: none;
}

.nav-logo:hover {
  color: var(--color-text);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-links a {
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: color var(--transition);
}

.nav-links a:hover {
  color: var(--color-text);
}

.nav-cta {
  padding: 8px 20px;
  background: var(--color-primary);
  color: #fff !important;
  border-radius: var(--radius-sm);
  font-weight: 600;
}

.nav-cta:hover {
  background: var(--color-primary-dark);
  color: #fff !important;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all 0.3s ease;
}

/* ─── Hero Section ────────────────────────────────────────────── */
.hero {
  position: relative;
  padding: 160px 0 100px;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-gradient {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 50% 0%, rgba(0,82,204,0.08) 0%, transparent 70%),
    radial-gradient(ellipse 40% 50% at 80% 20%, rgba(76,154,255,0.06) 0%, transparent 60%),
    radial-gradient(ellipse 40% 50% at 20% 30%, rgba(101,84,192,0.05) 0%, transparent 60%);
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,82,204,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,82,204,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 30%, black, transparent);
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 30%, black, transparent);
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px 6px 12px;
  background: var(--color-primary-bg);
  color: var(--color-primary);
  border-radius: 100px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 24px;
}

.badge-dot {
  width: 8px;
  height: 8px;
  background: var(--color-success);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

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

.hero-headline {
  font-size: 56px;
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}

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

.hero-subtext {
  font-size: 20px;
  line-height: 1.6;
  color: var(--color-text-secondary);
  margin-bottom: 32px;
  max-width: 480px;
}

.hero-ctas {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.hero-trust {
  display: flex;
  align-items: center;
  gap: 12px;
}

.trust-avatars {
  display: flex;
}

.trust-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 700;
  color: #fff;
  border: 2px solid #fff;
  margin-left: -8px;
}

.trust-avatar:first-child {
  margin-left: 0;
}

.trust-text {
  font-size: 14px;
  color: var(--color-text-muted);
}

/* ─── Hero Visual (Code Cards) ────────────────────────────────── */
.hero-visual {
  display: flex;
  align-items: center;
  gap: 16px;
}

.hero-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  flex: 1;
  min-width: 0;
}

.card-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  background: var(--color-bg-subtle);
  border-bottom: 1px solid var(--color-border);
}

.card-dots {
  display: flex;
  gap: 6px;
}

.card-dots span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.card-title {
  font-size: 12px;
  font-weight: 500;
  color: var(--color-text-muted);
}

.card-body {
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.card-body code {
  font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
  font-size: 12px;
  line-height: 1.7;
  display: block;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.card-html code {
  color: var(--color-danger);
}

.card-md code {
  color: var(--color-primary);
}

.card-md code em {
  font-style: normal;
}

.hero-arrow {
  flex-shrink: 0;
}

.hero-arrow svg {
  filter: drop-shadow(0 4px 12px rgba(0,82,204,0.3));
  animation: arrowBounce 2s ease-in-out infinite;
}

@keyframes arrowBounce {
  0%, 100% { transform: translateX(0); }
  50% { transform: translateX(6px); }
}

/* ─── Section Shared ──────────────────────────────────────────── */
.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 60px;
}

.section-tag {
  display: inline-block;
  padding: 4px 14px;
  background: var(--color-primary-bg);
  color: var(--color-primary);
  font-size: 13px;
  font-weight: 600;
  border-radius: 100px;
  margin-bottom: 16px;
  letter-spacing: 0.02em;
}

.section-title {
  font-size: 40px;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 18px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* ─── Features ────────────────────────────────────────────────── */
.features {
  padding: 100px 0;
  background: var(--color-bg-muted);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: all 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary-light);
}

.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.feature-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
}

.feature-card p {
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* ─── How It Works ────────────────────────────────────────────── */
.how-it-works {
  padding: 100px 0;
}

.steps {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 0;
  max-width: 900px;
  margin: 0 auto;
}

.step {
  flex: 1;
  text-align: center;
  padding: 0 24px;
}

.step-number {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  font-size: 22px;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  box-shadow: 0 4px 16px rgba(0,82,204,0.3);
}

.step-content h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 8px;
}

.step-content p {
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.step-connector {
  width: 80px;
  height: 2px;
  background: linear-gradient(90deg, var(--color-primary-light), var(--color-primary));
  margin-top: 28px;
  flex-shrink: 0;
  border-radius: 1px;
}

/* ─── Platforms ────────────────────────────────────────────────── */
.platforms {
  padding: 60px 0;
  background: var(--color-bg-muted);
}

.platforms-inner {
  text-align: center;
}

.platforms-inner h2 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 24px;
}

.platform-badges {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.platform-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 100px;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  box-shadow: var(--shadow-sm);
}

.platform-badge svg {
  color: var(--color-success);
}

/* ─── Contact ─────────────────────────────────────────────────── */
.contact {
  padding: 100px 0;
}

.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}

.contact-info .section-tag {
  margin-bottom: 16px;
}

.contact-info .section-title {
  text-align: left;
  font-size: 36px;
}

.contact-info .section-subtitle {
  text-align: left;
  margin-bottom: 32px;
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.contact-detail {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 15px;
  color: var(--color-text-secondary);
}

.contact-detail a {
  color: var(--color-text-secondary);
}

.contact-detail a:hover {
  color: var(--color-primary);
}

/* ─── Contact Form ────────────────────────────────────────────── */
.contact-form-wrapper {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-md);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
}

.form-group input,
.form-group select,
.form-group textarea {
  padding: 12px 16px;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
  font-size: 15px;
  color: var(--color-text);
  background: var(--color-bg);
  transition: all var(--transition);
  outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(0,82,204,0.1);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--color-text-muted);
}

.form-group textarea {
  resize: vertical;
  min-height: 100px;
}

.form-group select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%236B778C' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 40px;
}

.form-success {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px;
  background: #E3FCEF;
  border-radius: var(--radius-sm);
  color: #006644;
  font-weight: 500;
}

/* ─── Footer ──────────────────────────────────────────────────── */
.footer {
  background: var(--color-text);
  color: #B3BAC5;
  padding: 60px 0 0;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 60px;
  padding-bottom: 40px;
}

.footer-brand .nav-logo {
  color: #fff;
  margin-bottom: 12px;
}

.footer-brand p {
  font-size: 15px;
  line-height: 1.6;
  max-width: 320px;
}

.footer-links {
  display: flex;
  gap: 60px;
}

.footer-col {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col h4 {
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 4px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer-col a {
  font-size: 14px;
  color: #B3BAC5;
  transition: color var(--transition);
}

.footer-col a:hover {
  color: #fff;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 0;
  border-top: 1px solid rgba(255,255,255,0.1);
  font-size: 13px;
}

/* ─── Utilities ───────────────────────────────────────────────── */
.hidden {
  display: none !important;
}

/* ─── Scroll Animations ───────────────────────────────────────── */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ─── Responsive ──────────────────────────────────────────────── */
@media (max-width: 1024px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .hero {
    padding: 140px 0 80px;
  }

  .hero-headline {
    font-size: 44px;
  }

  .hero-visual {
    flex-direction: row;
    max-width: 600px;
  }

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

  .contact-layout {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .contact-info .section-title {
    font-size: 32px;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    padding: 16px 24px;
    gap: 16px;
    box-shadow: var(--shadow-md);
  }

  .nav-links.open {
    display: flex;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }

  .nav-toggle.active span:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }

  .hero {
    padding: 120px 0 60px;
  }

  .hero-headline {
    font-size: 36px;
  }

  .hero-subtext {
    font-size: 17px;
  }

  .hero-ctas {
    flex-direction: column;
  }

  .hero-ctas .btn {
    width: 100%;
  }

  .hero-visual {
    flex-direction: column;
  }

  .hero-arrow {
    transform: rotate(90deg);
  }

  .section-title {
    font-size: 30px;
  }

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

  .steps {
    flex-direction: column;
    gap: 24px;
    align-items: center;
  }

  .step {
    max-width: 400px;
  }

  .step-connector {
    width: 2px;
    height: 40px;
    background: linear-gradient(180deg, var(--color-primary-light), var(--color-primary));
  }

  .platform-badges {
    flex-direction: column;
    align-items: center;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-links {
    gap: 40px;
  }

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

  .contact-form-wrapper {
    padding: 24px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .hero-headline {
    font-size: 30px;
  }

  .section-title {
    font-size: 26px;
  }

  .feature-card {
    padding: 24px;
  }
}