/* ============================================
   THE COLD STANDARD - Premium Cold Plunge Service
   ============================================ */

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

:root {
  --navy: #0a1628;
  --navy-light: #121f36;
  --navy-mid: #1a2d4a;
  --ice: #7ec8e3;
  --ice-light: #b8e4f0;
  --ice-glow: rgba(126, 200, 227, 0.15);
  --white: #ffffff;
  --gray-50: #f8fafc;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --gray-400: #94a3b8;
  --gray-500: #64748b;
  --gray-600: #475569;
  --gray-800: #1e293b;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --radius: 12px;
  --radius-lg: 20px;
  --shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-lg: 0 10px 40px rgba(0,0,0,0.12);
  --shadow-xl: 0 20px 60px rgba(0,0,0,0.15);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: var(--font);
  color: var(--gray-800);
  line-height: 1.6;
  background: var(--white);
  overflow-x: hidden;
}

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

h1, h2, h3, h4 { line-height: 1.2; font-weight: 700; }
h1 { font-size: clamp(2.5rem, 6vw, 4.5rem); }
h2 { font-size: clamp(1.8rem, 4vw, 2.8rem); }
h3 { font-size: 1.25rem; }

a { color: inherit; text-decoration: none; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 32px;
  border-radius: 8px;
  font-family: var(--font);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  border: 2px solid transparent;
}

.btn-primary {
  background: var(--ice);
  color: var(--navy);
  border-color: var(--ice);
}
.btn-primary:hover {
  background: var(--ice-light);
  border-color: var(--ice-light);
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(126, 200, 227, 0.4);
}

.btn-outline {
  background: transparent;
  color: var(--white);
  border-color: rgba(255,255,255,0.3);
}
.btn-outline:hover {
  border-color: var(--white);
  background: rgba(255,255,255,0.05);
}

.btn-full { width: 100%; }

/* Navigation */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 16px 0;
  transition: var(--transition);
  background: transparent;
}

.nav.scrolled {
  background: rgba(10, 22, 40, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 12px 0;
  box-shadow: 0 4px 30px rgba(0,0,0,0.2);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-size: 0.85rem;
  font-weight: 800;
  letter-spacing: 0.15em;
  color: var(--white);
  display: flex;
  align-items: center;
  gap: 8px;
}

.logo-mark {
  color: var(--ice);
  font-size: 1.1rem;
}

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

.nav-links a {
  color: rgba(255,255,255,0.7);
  font-size: 0.9rem;
  font-weight: 500;
  transition: var(--transition);
}
.nav-links a:hover { color: var(--white); }

.nav-cta {
  background: var(--ice) !important;
  color: var(--navy) !important;
  padding: 10px 24px !important;
  border-radius: 8px;
  font-weight: 600 !important;
}
.nav-cta:hover {
  background: var(--ice-light) !important;
  transform: translateY(-1px);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--white);
  transition: var(--transition);
}

/* Hero */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: var(--navy);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 70% 20%, rgba(126, 200, 227, 0.08) 0%, transparent 60%),
    radial-gradient(ellipse at 30% 80%, rgba(126, 200, 227, 0.05) 0%, transparent 50%),
    linear-gradient(180deg, var(--navy) 0%, var(--navy-light) 100%);
}

.hero-content {
  position: relative;
  z-index: 1;
  padding: 120px 24px 80px;
}

.hero-badge {
  display: inline-block;
  padding: 8px 20px;
  background: var(--ice-glow);
  border: 1px solid rgba(126, 200, 227, 0.2);
  border-radius: 100px;
  color: var(--ice);
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 32px;
  letter-spacing: 0.02em;
}

.hero h1 {
  color: var(--white);
  margin-bottom: 24px;
  max-width: 700px;
}

.hero-accent {
  color: var(--ice);
}

.hero-sub {
  color: var(--gray-400);
  font-size: 1.2rem;
  max-width: 540px;
  margin-bottom: 40px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 16px;
  margin-bottom: 64px;
  flex-wrap: wrap;
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 32px;
  padding-top: 40px;
  border-top: 1px solid rgba(255,255,255,0.08);
}

.stat-number {
  display: block;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--white);
}
.stat-label {
  display: block;
  font-size: 0.8rem;
  color: var(--gray-400);
  font-weight: 500;
  margin-top: 4px;
}
.stat-divider {
  width: 1px;
  height: 40px;
  background: rgba(255,255,255,0.1);
}

/* Problem Section */
.problem {
  padding: 120px 0;
  background: var(--gray-50);
}

.problem-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.problem-text h2 {
  margin-bottom: 24px;
  color: var(--navy);
}
.problem-text p {
  color: var(--gray-600);
  margin-bottom: 16px;
  font-size: 1.05rem;
}

.problem-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.pain-card {
  background: var(--white);
  padding: 24px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: var(--transition);
}
.pain-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}
.pain-icon {
  font-size: 1.5rem;
  margin-bottom: 12px;
}
.pain-card h4 {
  color: var(--navy);
  margin-bottom: 8px;
  font-size: 0.95rem;
}
.pain-card p {
  color: var(--gray-500);
  font-size: 0.85rem;
  line-height: 1.5;
}

/* Services / Plans */
.services {
  padding: 120px 0;
  background: var(--white);
}

.section-header {
  text-align: center;
  margin-bottom: 64px;
}
.section-header h2 {
  color: var(--navy);
  margin-bottom: 16px;
}
.section-header p {
  color: var(--gray-500);
  font-size: 1.1rem;
  max-width: 500px;
  margin: 0 auto;
}

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

.plans-grid-4 {
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.plan-badge-popular {
  background: var(--ice) !important;
  color: var(--navy) !important;
}

.plan-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  position: relative;
  transition: var(--transition);
}
.plan-card:hover {
  border-color: var(--ice);
  box-shadow: 0 8px 40px rgba(126, 200, 227, 0.1);
}

.plan-featured {
  background: var(--navy);
  border-color: var(--navy);
  transform: scale(1.03);
  box-shadow: var(--shadow-xl);
}
.plan-featured:hover {
  border-color: var(--ice);
}
.plan-featured h3,
.plan-featured .plan-desc,
.plan-featured .plan-features li,
.plan-featured .plan-price,
.plan-featured .price,
.plan-featured .period { color: var(--white); }
.plan-featured .plan-features li::before { color: var(--ice); }
.plan-featured .plan-badge { background: var(--ice); color: var(--navy); }

.plan-badge {
  display: inline-block;
  padding: 4px 14px;
  background: var(--navy);
  color: var(--white);
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.plan-card h3 {
  color: var(--navy);
  margin-bottom: 16px;
  font-size: 1.3rem;
}

.plan-price {
  margin-bottom: 16px;
}
.price {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--navy);
}
.period {
  font-size: 1rem;
  color: var(--gray-400);
  font-weight: 400;
}

.plan-desc {
  color: var(--gray-500);
  font-size: 0.9rem;
  margin-bottom: 24px;
  line-height: 1.6;
}

.plan-features {
  list-style: none;
  margin-bottom: 32px;
}
.plan-features li {
  padding: 8px 0;
  font-size: 0.9rem;
  color: var(--gray-600);
  display: flex;
  align-items: flex-start;
  gap: 10px;
}
.plan-features li::before {
  content: '\2713';
  color: var(--ice);
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 2px;
}

/* How It Works */
.how-it-works {
  padding: 120px 0;
  background: var(--navy);
}
.how-it-works .section-header h2 { color: var(--white); }
.how-it-works .section-header p { color: var(--gray-400); }

.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}

.step {
  text-align: center;
  padding: 32px 20px;
}

.step-number {
  font-size: 3rem;
  font-weight: 800;
  color: var(--ice);
  opacity: 0.3;
  margin-bottom: 16px;
  line-height: 1;
}
.step h3 {
  color: var(--white);
  margin-bottom: 12px;
  font-size: 1.1rem;
}
.step p {
  color: var(--gray-400);
  font-size: 0.9rem;
  line-height: 1.6;
}

/* Brands */
.brands {
  padding: 100px 0;
  background: var(--gray-50);
}

.brand-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 16px;
}

.brand-item {
  padding: 12px 28px;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: 100px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--gray-600);
  transition: var(--transition);
}
.brand-item:hover {
  border-color: var(--ice);
  color: var(--navy);
  background: var(--ice-glow);
}

/* About */
.about {
  padding: 120px 0;
  background: var(--white);
}

.about-text h2 {
  color: var(--navy);
  margin-bottom: 24px;
}
.about-text p {
  color: var(--gray-600);
  font-size: 1.05rem;
  margin-bottom: 16px;
  max-width: 700px;
}

.cert-badges {
  display: flex;
  gap: 24px;
  margin-top: 40px;
  flex-wrap: wrap;
}
.cert {
  padding: 20px 28px;
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  text-align: center;
}
.cert strong {
  display: block;
  font-size: 1.1rem;
  color: var(--navy);
  margin-bottom: 4px;
}
.cert span {
  font-size: 0.8rem;
  color: var(--gray-500);
}

/* Social Proof */
.social-proof {
  padding: 100px 0;
  background: var(--navy-light);
}

.proof-content {
  text-align: center;
}
.proof-content h2 {
  color: var(--white);
  margin-bottom: 16px;
}
.proof-sub {
  color: var(--gray-400);
  font-size: 1.1rem;
  margin-bottom: 40px;
}

.proof-locations {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}
.proof-locations span {
  padding: 8px 20px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 100px;
  color: var(--gray-400);
  font-size: 0.85rem;
  font-weight: 500;
}

/* Contact */
.contact {
  padding: 120px 0;
  background: var(--gray-50);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 64px;
  align-items: start;
}

.contact-text h2 {
  color: var(--navy);
  margin-bottom: 16px;
}
.contact-text > p {
  color: var(--gray-500);
  font-size: 1.05rem;
  margin-bottom: 40px;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.contact-item strong {
  display: block;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--gray-400);
  margin-bottom: 4px;
}
.contact-item a,
.contact-item span {
  color: var(--navy);
  font-size: 1rem;
  font-weight: 500;
}

.contact-form-wrap {
  background: var(--white);
  padding: 40px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

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

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

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

.form-group label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--gray-600);
}

.form-group input,
.form-group select,
.form-group textarea {
  padding: 12px 16px;
  border: 1px solid var(--gray-200);
  border-radius: 8px;
  font-family: var(--font);
  font-size: 0.95rem;
  color: var(--gray-800);
  transition: var(--transition);
  background: var(--white);
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--ice);
  box-shadow: 0 0 0 3px var(--ice-glow);
}

.form-group textarea { resize: vertical; }

.form-note {
  text-align: center;
  font-size: 0.8rem;
  color: var(--gray-400);
  margin-top: 4px;
}

/* Footer */
.footer {
  background: var(--navy);
  padding: 80px 0 40px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 60px;
}

.footer-logo {
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.15em;
  color: var(--white);
  margin-bottom: 16px;
}

.footer-brand p {
  color: var(--gray-400);
  font-size: 0.9rem;
  line-height: 1.6;
  max-width: 280px;
}

.footer-links h4 {
  color: var(--white);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 20px;
}
.footer-links a {
  display: block;
  color: var(--gray-400);
  font-size: 0.9rem;
  padding: 6px 0;
  transition: var(--transition);
}
.footer-links a:hover { color: var(--ice); }

.footer-bottom {
  padding-top: 32px;
  border-top: 1px solid rgba(255,255,255,0.08);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-bottom p {
  color: var(--gray-500);
  font-size: 0.8rem;
}

/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 1024px) {
  .plans-grid, .plans-grid-4 { grid-template-columns: 1fr 1fr; max-width: 900px; margin: 0 auto; }
  .plan-featured { transform: none; }
  .steps-grid { grid-template-columns: 1fr 1fr; }
  .problem-grid { grid-template-columns: 1fr; gap: 48px; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--navy);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 32px;
    z-index: 999;
  }
  .nav-links.active { display: flex; }
  .nav-links a { font-size: 1.2rem; color: var(--white); }
  .nav-toggle { display: flex; z-index: 1001; }

  .hero-content { padding: 100px 24px 60px; }
  .hero-stats { flex-direction: column; align-items: flex-start; gap: 20px; }
  .stat-divider { width: 40px; height: 1px; }

  .steps-grid { grid-template-columns: 1fr; }
  .problem-cards { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; text-align: center; }

  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; }

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

  .cert-badges { flex-direction: column; }
}