/* ============================================
   String of Turtles — Components
   Nav, Cards, Buttons, Footer, Hero
   ============================================ */

/* ---- Navbar ---- */
.navbar {
  position: sticky;
  top: 0;
  z-index: var(--z-navbar);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  height: var(--nav-height);
}

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

.navbar-brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: 'Playfair Display', serif;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary);
}

.navbar-brand:hover {
  color: var(--color-primary);
}

.navbar-brand .brand-icon {
  width: 32px;
  height: 32px;
}

.nav-links {
  display: none;
  gap: var(--space-xl);
}

.nav-links a {
  position: relative;
  font-size: 0.95rem;
  font-weight: 400;
  color: var(--color-text-secondary);
  padding: var(--space-xs) 0;
  transition: color var(--transition-base);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  border-radius: 1px;
  transition: width var(--transition-base);
}

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

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

/* Hamburger menu */
.nav-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 28px;
  height: 28px;
  padding: 0;
  background: none;
  border: none;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-text);
  border-radius: 1px;
  transition: transform var(--transition-base), opacity var(--transition-fast);
}

.nav-toggle.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

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

.nav-toggle.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile menu */
.nav-mobile {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(10px);
  z-index: var(--z-mobile-nav);
  padding: var(--space-2xl) var(--container-padding);
}

.nav-mobile.open {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.nav-mobile a {
  font-size: 1.25rem;
  font-weight: 400;
  color: var(--color-text);
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--color-border);
}

.nav-mobile a:hover,
.nav-mobile a.active {
  color: var(--color-primary);
}

@media (min-width: 768px) {
  .nav-links {
    display: flex;
  }

  .nav-toggle {
    display: none;
  }

  .nav-mobile {
    display: none !important;
  }
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 0.75rem 1.5rem;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: all var(--transition-base);
  text-decoration: none;
  cursor: pointer;
}

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

.btn-primary:hover {
  background: var(--color-primary-light);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}

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

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

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.85rem;
}

/* ---- Cards ---- */
.card {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  padding: var(--space-xl);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

.card-icon {
  font-size: 2rem;
  margin-bottom: var(--space-md);
}

.card h3 {
  margin-bottom: var(--space-sm);
}

.card p {
  font-size: 0.95rem;
}

.card-freq {
  font-weight: 600;
  color: var(--color-primary);
  font-size: 0.9rem;
  margin-bottom: var(--space-sm);
}

/* ---- Hero ---- */
.hero {
  position: relative;
  padding: var(--space-4xl) 0;
  overflow: hidden;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 600px;
}

.hero h1 {
  margin-bottom: var(--space-lg);
  color: var(--color-primary);
}

.hero .lead {
  font-size: 1.15rem;
  line-height: 1.7;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-xl);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
}

.hero-visual {
  display: none;
}

@media (min-width: 1024px) {
  .hero .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-3xl);
  }

  .hero-visual {
    display: block;
    flex: 0 0 420px;
  }

  .hero-visual img {
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
  }
}

.hero-compact {
  padding: var(--space-3xl) 0 var(--space-2xl);
}

.hero-compact .lead {
  margin-bottom: 0;
}

/* ---- Section Header ---- */
.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto var(--space-2xl);
}

.section-header h2 {
  margin-bottom: var(--space-sm);
}

.section-header p {
  font-size: 1.05rem;
}

/* ---- Badge ---- */
.badge {
  display: inline-block;
  padding: 0.2rem 0.65rem;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: var(--radius-full);
  background: var(--color-primary-lighter);
  color: var(--color-primary);
}

/* ---- Footer ---- */
.site-footer {
  background: var(--color-primary);
  color: rgba(255, 255, 255, 0.85);
  padding: var(--space-3xl) 0 var(--space-xl);
}

.footer-grid {
  display: grid;
  gap: var(--space-2xl);
  margin-bottom: var(--space-2xl);
}

@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr;
  }
}

.footer-brand {
  font-family: 'Playfair Display', serif;
  font-size: 1.25rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: var(--space-md);
}

.footer-desc {
  font-size: 0.9rem;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.7);
}

.footer-heading {
  font-family: 'Source Sans 3', sans-serif;
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: rgba(255, 255, 255, 0.5);
  margin-bottom: var(--space-md);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer-links a {
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.9rem;
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  padding-top: var(--space-lg);
  text-align: center;
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.5);
}