/* =============================================
   Tuft Family Swimmers — Styles
   ============================================= */

:root {
  --ocean-deep: #0a2540;
  --ocean-mid: #1a4b7a;
  --ocean-light: #2d7dd2;
  --ocean-bright: #00b4d8;
  --ocean-pale: #caf0f8;
  --teal: #06d6a0;
  --teal-dark: #04a87d;
  --sand: #fff8f0;
  --white: #ffffff;
  --text-dark: #0a2540;
  --text-mid: #3d5166;
  --text-light: #6e8298;
  --border: #e4eaf2;
  --shadow-sm: 0 2px 8px rgba(10,37,64,0.08);
  --shadow-md: 0 8px 30px rgba(10,37,64,0.12);
  --shadow-lg: 0 20px 60px rgba(10,37,64,0.16);
  --radius: 16px;
  --radius-sm: 8px;
  --radius-lg: 24px;
  --transition: 0.25s ease;
}

/* Reset & Base */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', system-ui, sans-serif;
  color: var(--text-dark);
  background: var(--white);
  line-height: 1.65;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }

/* Typography */
h1, h2, h3, h4 { line-height: 1.2; font-weight: 700; }
h1 { font-family: 'Playfair Display', Georgia, serif; font-size: clamp(2.2rem, 5vw, 3.8rem); }
h2 { font-size: clamp(1.8rem, 3.5vw, 2.6rem); }
h3 { font-size: 1.25rem; }
h4 { font-size: 1rem; }
p { color: var(--text-mid); }
em { font-style: italic; color: var(--ocean-bright); }

/* Container */
.container { max-width: 1160px; margin: 0 auto; padding: 0 24px; }
.section { padding: 96px 0; }
.section-header { text-align: center; max-width: 640px; margin: 0 auto 60px; }
.section-header h2 { margin: 12px 0 16px; }
.section-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ocean-bright);
  background: rgba(0,180,216,0.1);
  padding: 4px 12px;
  border-radius: 100px;
}

/* =============================================
   Buttons
   ============================================= */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 100px;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: all var(--transition);
  border: none;
}
.btn-primary {
  background: var(--teal);
  color: var(--white);
  box-shadow: 0 4px 16px rgba(6,214,160,0.4);
}
.btn-primary:hover {
  background: var(--teal-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(6,214,160,0.45);
}
.btn-ghost {
  background: rgba(255,255,255,0.15);
  color: var(--white);
  border: 1.5px solid rgba(255,255,255,0.4);
  backdrop-filter: blur(8px);
}
.btn-ghost:hover {
  background: rgba(255,255,255,0.25);
  transform: translateY(-2px);
}
.btn-full { width: 100%; justify-content: center; }

/* =============================================
   Navigation
   ============================================= */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 20px 0;
  transition: all 0.3s ease;
}
.nav--scrolled {
  background: rgba(10,37,64,0.96);
  backdrop-filter: blur(12px);
  padding: 14px 0;
  box-shadow: 0 4px 24px rgba(0,0,0,0.2);
}
.nav-inner {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--white);
  font-weight: 700;
  font-size: 1.05rem;
}
.nav-logo-img {
  height: 32px;
  width: auto;
  border-radius: 4px;
  background: var(--white);
  padding: 2px 4px;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}
.nav-links a {
  color: rgba(255,255,255,0.85);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color var(--transition);
}
.nav-links a:hover { color: var(--white); }
.nav-cta {
  background: var(--teal) !important;
  color: var(--white) !important;
  padding: 8px 20px;
  border-radius: 100px;
  font-weight: 600 !important;
}
.nav-cta:hover { background: var(--teal-dark) !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(--white);
  border-radius: 2px;
  transition: all 0.3s;
}
.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); }

/* =============================================
   Hero
   ============================================= */
.hero {
  min-height: 100vh;
  background: linear-gradient(160deg, var(--ocean-deep) 0%, var(--ocean-mid) 60%, #1e6bb0 100%);
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: 120px 24px 80px;
}
.hero-bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

/* Wave animations */
.wave {
  position: absolute;
  bottom: 0;
  left: -50%;
  width: 200%;
  height: 180px;
  border-radius: 50% 50% 0 0;
  opacity: 0.15;
}
.wave1 {
  background: var(--ocean-bright);
  animation: waveMove 8s linear infinite;
  height: 160px;
}
.wave2 {
  background: var(--teal);
  animation: waveMove 11s linear infinite reverse;
  height: 130px;
  opacity: 0.1;
}
.wave3 {
  background: var(--ocean-pale);
  animation: waveMove 14s linear infinite;
  height: 100px;
  opacity: 0.06;
}
@keyframes waveMove {
  0% { transform: translateX(0) scaleY(1); }
  50% { transform: translateX(-25%) scaleY(1.1); }
  100% { transform: translateX(-50%) scaleY(1); }
}

/* Bubble particles */
.hero-bg::before, .hero-bg::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  background: rgba(255,255,255,0.05);
}
.hero-bg::before {
  width: 500px; height: 500px;
  top: -100px; right: -100px;
}
.hero-bg::after {
  width: 300px; height: 300px;
  bottom: 100px; left: -80px;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 780px;
  color: var(--white);
}
.hero-badge {
  display: inline-block;
  background: rgba(255,255,255,0.15);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255,255,255,0.25);
  padding: 6px 18px;
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  margin-bottom: 24px;
  color: var(--ocean-pale);
}
.hero-title {
  color: var(--white);
  margin-bottom: 20px;
  text-shadow: 0 2px 20px rgba(0,0,0,0.2);
}
.hero-sub {
  font-size: 1.15rem;
  color: rgba(255,255,255,0.8);
  max-width: 580px;
  margin: 0 auto 36px;
  line-height: 1.7;
}
.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 56px;
}
.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 32px;
  background: rgba(255,255,255,0.1);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: var(--radius-lg);
  padding: 20px 40px;
  flex-wrap: wrap;
  gap: 24px;
}
.stat { text-align: center; }
.stat strong { display: block; font-size: 1.6rem; font-weight: 800; color: var(--white); }
.stat span { font-size: 0.8rem; color: rgba(255,255,255,0.7); font-weight: 500; }
.stat-divider {
  width: 1px;
  height: 36px;
  background: rgba(255,255,255,0.25);
}
.hero-scroll-hint {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  text-align: center;
  color: rgba(255,255,255,0.5);
  font-size: 0.75rem;
  z-index: 2;
}
.scroll-arrow {
  width: 20px;
  height: 20px;
  border-right: 2px solid rgba(255,255,255,0.4);
  border-bottom: 2px solid rgba(255,255,255,0.4);
  transform: rotate(45deg);
  margin: 8px auto 0;
  animation: bounce 1.6s infinite;
}
@keyframes bounce {
  0%, 100% { transform: rotate(45deg) translateY(0); }
  50% { transform: rotate(45deg) translateY(5px); }
}

/* =============================================
   Programs
   ============================================= */
.programs { background: var(--sand); }
.program-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}
.program-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  box-shadow: var(--shadow-sm);
  border: 1.5px solid var(--border);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}
.program-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--ocean-light), var(--ocean-bright));
  opacity: 0;
  transition: opacity var(--transition);
}
.program-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--ocean-pale);
}
.program-card:hover::before { opacity: 1; }
.program-card--featured {
  background: linear-gradient(145deg, var(--ocean-deep), var(--ocean-mid));
  color: var(--white);
  border-color: transparent;
  box-shadow: var(--shadow-lg);
}
.program-card--featured p,
.program-card--featured .program-age {
  color: rgba(255,255,255,0.75) !important;
}
.program-card--featured h3 { color: var(--white); }
.program-card--featured .card-link { color: var(--teal); }
.program-card--featured::before {
  background: linear-gradient(90deg, var(--teal), var(--ocean-bright));
  opacity: 1;
}
.program-badge {
  display: inline-block;
  background: var(--teal);
  color: var(--white);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 3px 10px;
  border-radius: 100px;
  margin-bottom: 16px;
}
.program-icon { font-size: 2.5rem; margin-bottom: 16px; }
.program-card h3 { margin-bottom: 4px; }
.program-age {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--ocean-light);
  display: block;
  margin-bottom: 12px;
}
.program-card p { font-size: 0.92rem; margin-bottom: 20px; }
.card-link {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--ocean-light);
  transition: color var(--transition);
}
.card-link:hover { color: var(--ocean-bright); }

/* =============================================
   Why Us
   ============================================= */
.why-us { background: var(--white); }
.why-us-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}
.why-us-visual {
  position: relative;
}
.photo-stack {
  display: flex;
  flex-direction: column;
  gap: 16px;
  width: 100%;
}
.photo-stack-back,
.photo-stack-front {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 4px solid var(--white);
}
.photo-stack-back img,
.photo-stack-front img {
  width: 100%;
  height: 280px;
  object-fit: cover;
  display: block;
}

.why-us-content .section-tag { display: inline-block; margin-bottom: 12px; }
.why-us-content h2 { margin-bottom: 32px; }
.feature-list { display: flex; flex-direction: column; gap: 24px; }
.feature {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}
.feature-dot {
  width: 10px;
  height: 10px;
  min-width: 10px;
  border-radius: 50%;
  background: var(--teal);
  margin-top: 6px;
  box-shadow: 0 0 0 4px rgba(6,214,160,0.15);
}
.feature h4 { margin-bottom: 4px; color: var(--text-dark); }
.feature p { font-size: 0.9rem; }

/* =============================================
   Levels
   ============================================= */
.levels-section { background: var(--sand); }
.levels-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 20px;
}
.level-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 28px;
  border: 1.5px solid var(--border);
  box-shadow: var(--shadow-sm);
  display: flex;
  gap: 20px;
  transition: all var(--transition);
}
.level-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
  border-color: var(--ocean-pale);
}
.level-num {
  width: 52px;
  min-width: 52px;
  height: 52px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--ocean-light), var(--ocean-bright));
  color: var(--white);
  font-size: 1rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: 0 4px 12px rgba(45,125,210,0.35);
}
.level-info h3 { margin-bottom: 4px; }
.level-age {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--ocean-light);
  background: rgba(45,125,210,0.08);
  padding: 2px 10px;
  border-radius: 100px;
  margin-bottom: 10px;
}
.level-info p { font-size: 0.88rem; margin-bottom: 14px; }
.skill-list { display: flex; flex-direction: column; gap: 6px; }
.skill-list li {
  font-size: 0.82rem;
  color: var(--text-mid);
  padding-left: 16px;
  position: relative;
}
.skill-list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--teal);
  font-weight: 700;
  font-size: 0.75rem;
}

/* =============================================
   Schedule
   ============================================= */
.schedule-section { background: var(--white); }
.schedule-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 28px;
}
.session-card {
  background: var(--sand);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 12px;
  transition: all var(--transition);
}
.session-card:hover {
  border-color: var(--ocean-bright);
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}
.session-num {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--ocean-light), var(--ocean-bright));
  color: var(--white);
  font-size: 0.9rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(45,125,210,0.3);
}
.session-num::before { content: 'Session '; font-size: 0; }
.session-dates { flex: 1; }
.session-month {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-light);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 4px;
}
.session-range {
  display: block;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-dark);
  line-height: 1.1;
}
.session-range--small {
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--text-light);
  margin-top: 4px;
}
.session-enroll {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--ocean-light);
  transition: color var(--transition);
}
.session-enroll:hover { color: var(--teal-dark); }
.schedule-note {
  text-align: center;
  font-size: 0.88rem;
  color: var(--text-light);
}
.schedule-note strong { color: var(--text-dark); }

/* =============================================
   Testimonial Band
   ============================================= */
.testimonial-band {
  background: linear-gradient(135deg, var(--ocean-deep), var(--ocean-mid));
  padding: 72px 24px;
  text-align: center;
}
.testimonial-inner { max-width: 680px; margin: 0 auto; }
.quote-mark {
  font-size: 5rem;
  line-height: 0.5;
  color: var(--teal);
  font-family: Georgia, serif;
  display: block;
  margin-bottom: 20px;
}
blockquote {
  font-size: clamp(1.1rem, 2.5vw, 1.4rem);
  color: var(--white);
  font-style: italic;
  font-family: 'Playfair Display', Georgia, serif;
  line-height: 1.6;
  margin-bottom: 20px;
}
cite {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.6);
  font-style: normal;
  font-weight: 500;
}

/* =============================================
   Contact
   ============================================= */
.contact-section { background: var(--white); }
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 64px;
  align-items: start;
}
.contact-info .section-tag { display: inline-block; margin-bottom: 12px; }
.contact-info h2 { margin-bottom: 16px; }
.contact-info > p { margin-bottom: 36px; }
.contact-details { display: flex; flex-direction: column; gap: 20px; }
.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}
.contact-icon { font-size: 1.4rem; }
.contact-item strong {
  display: block;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-light);
  margin-bottom: 4px;
}
.contact-item a {
  color: var(--ocean-light);
  font-weight: 500;
  font-size: 1rem;
  transition: color var(--transition);
}
.contact-item a:hover { color: var(--ocean-bright); }

.contact-form-wrap {
  background: var(--sand);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-sm);
  border: 1.5px solid var(--border);
}
.contact-form h3 { margin-bottom: 24px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { display: flex; flex-direction: column; gap: 6px; margin-bottom: 16px; }
.form-group label { font-size: 0.82rem; font-weight: 600; color: var(--text-dark); }
.form-group input,
.form-group select,
.form-group textarea {
  padding: 12px 16px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 0.92rem;
  color: var(--text-dark);
  background: var(--white);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
  width: 100%;
  resize: vertical;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--ocean-bright);
  box-shadow: 0 0 0 3px rgba(0,180,216,0.12);
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--text-light); }
.form-success {
  margin-top: 12px;
  padding: 12px 16px;
  background: rgba(6,214,160,0.1);
  border: 1px solid rgba(6,214,160,0.3);
  border-radius: var(--radius-sm);
  color: var(--teal-dark);
  font-weight: 600;
  font-size: 0.9rem;
  text-align: center;
}

/* =============================================
   Footer
   ============================================= */
.footer {
  background: var(--ocean-deep);
  padding: 60px 0 0;
}
.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
.footer-brand p {
  color: rgba(255,255,255,0.5);
  font-size: 0.88rem;
  margin-top: 12px;
  max-width: 260px;
}
.footer-links h4,
.footer-contact h4 {
  color: var(--white);
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 16px;
}
.footer-links ul { display: flex; flex-direction: column; gap: 10px; }
.footer-links a {
  color: rgba(255,255,255,0.55);
  font-size: 0.88rem;
  transition: color var(--transition);
}
.footer-links a:hover { color: var(--white); }
.footer-contact p { margin-bottom: 8px; }
.footer-contact a {
  color: rgba(255,255,255,0.55);
  font-size: 0.88rem;
  transition: color var(--transition);
}
.footer-contact a:hover { color: var(--white); }
.footer-bottom {
  text-align: center;
  padding: 20px 0;
}
.footer-bottom p {
  color: rgba(255,255,255,0.35);
  font-size: 0.8rem;
}

/* =============================================
   Animations
   ============================================= */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* =============================================
   Responsive
   ============================================= */
@media (max-width: 900px) {
  .why-us-grid { grid-template-columns: 1fr; gap: 48px; }
  .why-us-visual { height: auto; }
  .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 680px) {
  .section { padding: 64px 0; }
  .nav-links {
    display: none;
    position: fixed;
    inset: 0;
    background: var(--ocean-deep);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 32px;
    z-index: 999;
  }
  .nav-links.nav-links--open { display: flex; }
  .nav-links a { font-size: 1.2rem !important; }
  .nav-toggle { display: flex; z-index: 1000; }
  .hero-stats { gap: 16px; padding: 16px 24px; }
  .stat-divider { display: none; }
  .form-row { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; }
  .program-cards { grid-template-columns: 1fr; }
  .levels-grid { grid-template-columns: 1fr; }
  .level-card { flex-direction: column; }
  .contact-form-wrap { padding: 24px; }
}

@media (max-width: 400px) {
  .hero-actions { flex-direction: column; align-items: center; }
  .btn { width: 100%; justify-content: center; max-width: 260px; }
}