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

:root {
  --color-primary: #0d9488;
  --color-primary-dark: #0f766e;
  --color-dark: #0f172a;
  --color-text: #334155;
  --color-muted: #64748b;
  --color-bg: #f8fafc;
  --color-white: #ffffff;
  --color-accent: #f59e0b;
  --shadow: 0 4px 24px rgba(15, 23, 42, 0.08);
  --radius: 12px;
  --max-width: 1120px;
}

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

body {
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
}

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

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

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

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid #e2e8f0;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-dark);
  letter-spacing: -0.02em;
}

.logo span {
  color: var(--color-primary);
}

.main-nav ul {
  display: flex;
  gap: 1.75rem;
  list-style: none;
}

.main-nav a {
  color: var(--color-text);
  font-weight: 500;
  font-size: 0.95rem;
}

.main-nav a:hover {
  color: var(--color-primary);
}

.btn {
  display: inline-block;
  padding: 0.65rem 1.4rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  border: none;
  cursor: pointer;
  transition: background 0.2s, transform 0.15s;
}

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

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

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

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

/* ===== Hero ===== */
.hero {
  padding: 5rem 0 4rem;
  background: linear-gradient(135deg, #ecfdf5 0%, #f0fdfa 40%, var(--color-bg) 100%);
}

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

.hero-content h1 {
  font-size: clamp(2rem, 4vw, 2.75rem);
  line-height: 1.2;
  color: var(--color-dark);
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}

.hero-content h1 em {
  font-style: normal;
  color: var(--color-primary);
}

.hero-content p {
  font-size: 1.125rem;
  color: var(--color-muted);
  margin-bottom: 2rem;
  max-width: 480px;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.hero-visual {
  background: var(--color-white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 2rem;
  text-align: center;
}

.hero-visual-icon {
  font-size: 3rem;
  margin-bottom: 0.5rem;
}

.hero-visual-tagline {
  color: var(--color-muted);
  font-size: 0.95rem;
}

.hero-badge {
  display: inline-block;
  background: #d1fae5;
  color: var(--color-primary-dark);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.35rem 0.85rem;
  border-radius: 999px;
  margin-bottom: 1.25rem;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-top: 1.5rem;
}

.stat-item {
  padding: 1rem;
  background: var(--color-bg);
  border-radius: 8px;
}

.stat-item strong {
  display: block;
  font-size: 1.5rem;
  color: var(--color-dark);
}

.stat-item span {
  font-size: 0.8rem;
  color: var(--color-muted);
}

/* ===== Sections ===== */
section {
  padding: 4.5rem 0;
}

.section-header {
  text-align: center;
  max-width: 600px;
  margin: 0 auto 3rem;
}

.section-header h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  color: var(--color-dark);
  margin-bottom: 0.75rem;
}

.section-header p {
  color: var(--color-muted);
}

/* ===== Features ===== */
.features {
  background: var(--color-white);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.feature-card {
  padding: 1.75rem;
  border: 1px solid #e2e8f0;
  border-radius: var(--radius);
  transition: box-shadow 0.2s, border-color 0.2s;
}

.feature-card:hover {
  box-shadow: var(--shadow);
  border-color: #99f6e4;
}

.feature-icon {
  width: 48px;
  height: 48px;
  background: #ccfbf1;
  color: var(--color-primary);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 1rem;
}

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

.feature-card p {
  font-size: 0.925rem;
  color: var(--color-muted);
}

/* ===== About ===== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.about-content h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  color: var(--color-dark);
  margin-bottom: 1rem;
}

.about-content p {
  color: var(--color-muted);
  margin-bottom: 1rem;
}

.about-list {
  list-style: none;
  margin-top: 1.5rem;
}

.about-list li {
  padding: 0.5rem 0;
  padding-left: 1.75rem;
  position: relative;
  color: var(--color-text);
}

.about-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-weight: 700;
}

.about-box {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: var(--color-white);
  padding: 2.5rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.about-box h3 {
  font-size: 1.25rem;
  margin-bottom: 1rem;
}

.about-box p {
  opacity: 0.9;
  font-size: 0.95rem;
}

/* ===== FAQ ===== */
.faq {
  background: var(--color-white);
}

.faq-list {
  max-width: 720px;
  margin: 0 auto;
}

.faq-item {
  border-bottom: 1px solid #e2e8f0;
  padding: 1.25rem 0;
}

.faq-item:last-child {
  border-bottom: none;
}

.faq-item h3 {
  font-size: 1.05rem;
  color: var(--color-dark);
  margin-bottom: 0.5rem;
}

.faq-item p {
  font-size: 0.925rem;
  color: var(--color-muted);
}

/* ===== CTA ===== */
.cta {
  padding: 4rem 0;
}

.cta-box {
  background: var(--color-dark);
  color: var(--color-white);
  text-align: center;
  padding: 3.5rem 2rem;
  border-radius: var(--radius);
}

.cta-box h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  margin-bottom: 0.75rem;
}

.cta-box p {
  opacity: 0.8;
  margin-bottom: 1.75rem;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}

/* ===== Footer ===== */
.site-footer {
  background: #020617;
  color: #94a3b8;
  padding: 3rem 0 1.5rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 2rem;
  margin-bottom: 2.5rem;
}

.footer-brand .logo {
  color: var(--color-white);
  margin-bottom: 0.75rem;
  display: inline-block;
}

.footer-brand p {
  font-size: 0.9rem;
  line-height: 1.7;
}

.footer-col h4 {
  color: var(--color-white);
  font-size: 0.95rem;
  margin-bottom: 1rem;
}

.footer-col ul {
  list-style: none;
}

.footer-col li {
  margin-bottom: 0.5rem;
}

.footer-col a {
  color: #94a3b8;
  font-size: 0.9rem;
}

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

.footer-bottom {
  border-top: 1px solid #1e293b;
  padding-top: 1.5rem;
  text-align: center;
  font-size: 0.85rem;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .main-nav {
    display: none;
  }

  .hero-grid,
  .about-grid,
  .feature-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    padding: 3rem 0;
  }

  .hero-stats {
    grid-template-columns: 1fr;
  }

  section {
    padding: 3rem 0;
  }
}