/* Lensis Studio - Product Website
   Modern SaaS design: dark navy + white + accent blue
   No frameworks, system fonts, responsive */

:root {
  --navy: #0f1b2d;
  --navy-light: #1a2d47;
  --navy-mid: #243b55;
  --white: #ffffff;
  --gray-50: #f8fafc;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --gray-400: #94a3b8;
  --gray-500: #64748b;
  --gray-600: #475569;
  --gray-700: #334155;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --accent-light: #dbeafe;
  --radius: 8px;
  --shadow: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -2px rgba(0,0,0,0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -4px rgba(0,0,0,0.1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  color: var(--gray-700);
  background: var(--white);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

a:hover {
  color: var(--accent-hover);
}

img {
  max-width: 100%;
  height: auto;
}

/* ===== HEADER / NAV ===== */
.site-header {
  background: var(--navy);
  padding: 0 2rem;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(0,0,0,0.2);
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--white);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.logo svg {
  width: 28px;
  height: 28px;
}

.nav-links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
}

.nav-links a {
  color: var(--gray-300);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--white);
}

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--white);
  font-size: 1.5rem;
  cursor: pointer;
}

/* ===== MAIN CONTENT ===== */
main {
  flex: 1;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

.section {
  padding: 5rem 0;
}

.section--gray {
  background: var(--gray-50);
}

.section-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 1rem;
  text-align: center;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--gray-500);
  text-align: center;
  max-width: 640px;
  margin: 0 auto 3rem;
}

/* ===== HERO ===== */
.hero {
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-mid) 100%);
  color: var(--white);
  padding: 6rem 2rem;
  text-align: center;
}

.hero h1 {
  font-size: 2.75rem;
  font-weight: 800;
  line-height: 1.2;
  max-width: 800px;
  margin: 0 auto 1.25rem;
  letter-spacing: -0.03em;
}

.hero p {
  font-size: 1.2rem;
  color: var(--gray-300);
  max-width: 600px;
  margin: 0 auto 2rem;
}

.hero-badge {
  display: inline-block;
  background: rgba(59, 130, 246, 0.15);
  border: 1px solid rgba(59, 130, 246, 0.3);
  color: var(--accent);
  padding: 0.4rem 1rem;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 1.5rem;
}

.btn {
  display: inline-block;
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.95rem;
  transition: all 0.2s;
  cursor: pointer;
  border: none;
}

.btn--primary {
  background: var(--accent);
  color: var(--white);
}

.btn--primary:hover {
  background: var(--accent-hover);
  color: var(--white);
}

.btn--outline {
  background: transparent;
  border: 2px solid var(--gray-300);
  color: var(--white);
}

.btn--outline:hover {
  border-color: var(--white);
  color: var(--white);
}

/* ===== FEATURE CARDS ===== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}

.feature-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 2rem;
  transition: box-shadow 0.2s, transform 0.2s;
}

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

.feature-card .icon {
  width: 48px;
  height: 48px;
  background: var(--accent-light);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
  font-size: 1.5rem;
}

.feature-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--navy);
  margin-bottom: 0.5rem;
}

.feature-card p {
  font-size: 0.95rem;
  color: var(--gray-500);
}

/* ===== HOW IT WORKS ===== */
.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  counter-reset: step;
}

.step {
  text-align: center;
  padding: 1.5rem;
}

.step::before {
  counter-increment: step;
  content: counter(step);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background: var(--accent);
  color: var(--white);
  border-radius: 50%;
  font-size: 1.25rem;
  font-weight: 700;
  margin: 0 auto 1rem;
}

.step h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--navy);
  margin-bottom: 0.5rem;
}

.step p {
  font-size: 0.9rem;
  color: var(--gray-500);
}

/* ===== FEATURES PAGE: COMPOSER FLOW ===== */
.flow-section {
  margin-bottom: 3rem;
}

.flow-section h3 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--accent-light);
}

.mockup-box {
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin: 1rem 0;
}

.mockup-box .label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--gray-400);
  margin-bottom: 0.75rem;
}

.mockup-row {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--gray-200);
}

.mockup-row:last-child {
  border-bottom: none;
}

.mockup-toggle {
  width: 40px;
  height: 22px;
  background: var(--gray-300);
  border-radius: 11px;
  position: relative;
  flex-shrink: 0;
}

.mockup-toggle--on {
  background: var(--accent);
}

.mockup-toggle::after {
  content: '';
  position: absolute;
  width: 18px;
  height: 18px;
  background: white;
  border-radius: 50%;
  top: 2px;
  left: 2px;
  transition: transform 0.2s;
}

.mockup-toggle--on::after {
  transform: translateX(18px);
}

.mockup-dropdown {
  background: var(--white);
  border: 1px solid var(--gray-300);
  border-radius: 4px;
  padding: 0.5rem 1rem;
  font-size: 0.9rem;
  color: var(--gray-600);
  min-width: 180px;
}

.feature-list {
  list-style: none;
  padding: 0;
}

.feature-list li {
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--gray-100);
  padding-left: 1.5rem;
  position: relative;
  font-size: 0.95rem;
}

.feature-list li::before {
  content: "\2713";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 700;
}

/* ===== LEGAL PAGES ===== */
.legal-content {
  max-width: 800px;
  margin: 0 auto;
  padding: 3rem 2rem;
}

.legal-content h1 {
  font-size: 2rem;
  color: var(--navy);
  margin-bottom: 0.5rem;
}

.legal-content .effective-date {
  color: var(--gray-500);
  font-size: 0.9rem;
  margin-bottom: 2rem;
}

.legal-content h2 {
  font-size: 1.3rem;
  color: var(--navy);
  margin-top: 2rem;
  margin-bottom: 0.75rem;
}

.legal-content h3 {
  font-size: 1.1rem;
  color: var(--navy-light);
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
}

.legal-content p,
.legal-content li {
  margin-bottom: 0.75rem;
  color: var(--gray-600);
}

.legal-content ul,
.legal-content ol {
  padding-left: 1.5rem;
  margin-bottom: 1rem;
}

/* ===== CONTACT ===== */
.contact-card {
  max-width: 600px;
  margin: 0 auto;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 3rem;
  text-align: center;
  box-shadow: var(--shadow);
}

.contact-card h2 {
  font-size: 1.5rem;
  color: var(--navy);
  margin-bottom: 1rem;
}

.contact-card p {
  color: var(--gray-500);
  margin-bottom: 1.5rem;
}

.contact-email {
  font-size: 1.2rem;
  font-weight: 600;
}

/* ===== FOOTER ===== */
.site-footer {
  background: var(--navy);
  color: var(--gray-400);
  padding: 2rem;
  text-align: center;
  font-size: 0.85rem;
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
}

.footer-links {
  margin-bottom: 0.75rem;
}

.footer-links a {
  color: var(--gray-300);
  margin: 0 0.75rem;
  font-weight: 500;
}

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

.footer-copy {
  color: var(--gray-500);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 2rem;
  }

  .hero p {
    font-size: 1rem;
  }

  .header-inner {
    height: 56px;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 56px;
    left: 0;
    right: 0;
    background: var(--navy);
    flex-direction: column;
    padding: 1rem 2rem;
    gap: 1rem;
    border-top: 1px solid var(--navy-mid);
  }

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

  .nav-toggle {
    display: block;
  }

  .section {
    padding: 3rem 0;
  }

  .section-title {
    font-size: 1.5rem;
  }

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

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

  .legal-content {
    padding: 2rem 1rem;
  }

  .contact-card {
    padding: 2rem 1.5rem;
  }
}