:root {
  --primary: #0F4C81;
  --primary-hover: #0B3A64;
  --secondary: #2E8B57;
  --dark: #1E293B;
  --light: #F8FAFC;
  --white: #FFFFFF;
  --gray: #64748B;
  --border: #E2E8F0;
  --radius: 8px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  -webkit-tap-highlight-color: transparent;
}

body {
  color: var(--dark);
  background-color: #FFFFFF;
  line-height: 1.6;
  width: 100%;
  overflow-x: hidden;
}

/* --- Navbar (Placed above the login modal) --- */
.navbar {
  background: var(--white);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 3000; /* Higher than login-overlay so it stays visible and clickable */
  width: 100%;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.8rem 1.2rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-icon {
  font-size: 1.8rem;
  color: var(--primary);
}

.logo-text {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.3px;
  color: var(--primary);
}

.brand-sub {
  font-size: 0.7rem;
  letter-spacing: 0.8px;
  color: var(--gray);
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 15px;
  align-items: center;
}

.nav-links a {
  text-decoration: none;
  color: var(--dark);
  font-weight: 500;
  font-size: 0.95rem;
  padding: 6px 10px;
}

.portal-btn {
  background-color: var(--primary);
  color: var(--white) !important;
  padding: 8px 16px !important;
  border-radius: var(--radius);
  display: inline-block;
  text-align: center;
}

/* --- Hero Section --- */
.hero {
  padding: 2.5rem 1.2rem;
  background: linear-gradient(135deg, #F0F4F8 0%, #E6EEF8 100%);
}

.hero-container {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 30px;
  align-items: center;
}

.hero-content h1 {
  font-size: 2.2rem;
  line-height: 1.25;
  color: var(--primary);
  margin-bottom: 1rem;
}

.hero-content p {
  font-size: 1rem;
  color: var(--gray);
  margin-bottom: 1.5rem;
}

.hero-cta {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.hero-image {
  width: 100%;
  display: flex;
  justify-content: center;
}

.hero-image img {
  width: 100%;
  max-width: 340px;
  height: auto;
  border-radius: 12px;
  box-shadow: 0 15px 25px -5px rgba(0, 0, 0, 0.12);
  object-fit: cover;
}

/* --- Section Layouts --- */
.section {
  padding: 3rem 1.2rem;
}

.bg-light {
  background: var(--light);
}

.container {
  max-width: 1000px;
  margin: 0 auto;
}

.section-title {
  text-align: center;
  font-size: 1.75rem;
  color: var(--primary);
  margin-bottom: 0.5rem;
}

.section-subtitle {
  text-align: center;
  color: var(--gray);
  margin-bottom: 2rem;
  font-size: 0.95rem;
  padding: 0 10px;
}

/* --- About & Specialization Grids --- */
.about-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

.about-card {
  background: var(--white);
  padding: 22px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: 0 2px 4px rgba(0,0,0,0.02);
}

.about-card h3 {
  color: var(--primary);
  font-size: 1.15rem;
  margin-bottom: 8px;
}

.about-card p {
  font-size: 0.95rem;
  color: var(--dark);
}

/* --- Buttons & Inputs --- */
.btn {
  display: inline-block;
  padding: 12px 20px;
  border-radius: var(--radius);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  border: none;
  text-align: center;
  transition: background-color 0.2s ease;
}

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

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

.btn-secondary {
  background: #E2E8F0;
  color: var(--dark);
}

.btn-zoom {
  background: #2D8CFF;
  color: var(--white);
  width: 100%;
  text-align: center;
}

.btn-block {
  width: 100%;
}

.form-card {
  background: var(--white);
  padding: 24px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.form-group {
  margin-bottom: 18px;
}

.form-group label {
  display: block;
  margin-bottom: 6px;
  font-weight: 600;
  font-size: 0.9rem;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 1rem;
  background-color: var(--white);
}

/* --- Patient Portal Mobile Styles --- */
.portal-body {
  background-color: #F1F5F9;
}

/* Login Overlay positioning below sticky nav bar */
.login-overlay {
  position: fixed;
  top: 70px;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(15, 23, 42, 0.85);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  z-index: 2000;
}

.login-card {
  background: var(--white);
  padding: 28px 20px;
  border-radius: 12px;
  width: 100%;
  max-width: 400px;
  box-shadow: 0 10px 25px rgba(0,0,0,0.2);
}

.login-card h2 {
  font-size: 1.4rem;
  color: var(--primary);
  margin-bottom: 6px;
}

.login-card p {
  font-size: 0.85rem;
  color: var(--gray);
  margin-bottom: 20px;
}

.portal-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 15px;
}

.portal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  flex-wrap: wrap;
  gap: 12px;
}

.portal-header h1 {
  font-size: 1.4rem;
  color: var(--dark);
}

.badge {
  background: #DEF7EC;
  color: #03543F;
  font-size: 0.75rem;
  padding: 4px 8px;
  border-radius: 4px;
  font-weight: 600;
}

.portal-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.portal-card {
  background: var(--white);
  padding: 20px;
  border-radius: 8px;
  border: 1px solid var(--border);
}

.portal-card h3 {
  font-size: 1.1rem;
  color: var(--primary);
  margin-bottom: 10px;
}

.full-width {
  grid-column: span 2;
}

.exercise-list {
  list-style: none;
  margin-top: 10px;
}

.exercise-list li {
  margin-bottom: 10px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
  font-size: 0.95rem;
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 12px;
  margin-top: 10px;
}

.metric-box {
  background: var(--light);
  padding: 15px;
  border-radius: 6px;
  text-align: center;
}

.metric-score {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--primary);
  display: block;
}

.metric-title {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--dark);
}

.metric-note {
  font-size: 0.75rem;
  color: var(--gray);
  display: block;
  margin-top: 4px;
}

.hidden {
  display: none !important;
}

/* --- Footer --- */
footer {
  background: var(--dark);
  color: var(--white);
  padding: 1.5rem 1rem;
  text-align: center;
  font-size: 0.85rem;
}

/* ===================================================
   RESPONSIVE MEDIA QUERIES (Mobile & Tablet)
   =================================================== */

@media (max-width: 900px) {
  .hero-container {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-cta {
    justify-content: center;
  }

  .hero-content h1 {
    font-size: 1.85rem;
  }
}

@media (max-width: 640px) {
  .nav-container {
    flex-direction: column;
    gap: 12px;
    align-items: center;
  }

  .nav-links {
    width: 100%;
    justify-content: center;
    gap: 8px;
    flex-wrap: wrap;
  }

  .nav-links a {
    font-size: 0.85rem;
    padding: 4px 6px;
  }

  .hero-cta .btn {
    width: 100%;
  }

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

  .full-width {
    grid-column: span 1;
  }

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

  .portal-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .portal-header button {
    width: 100%;
  }
}

/* Force hide the public navbar when hidden class is applied */
#public-nav.hidden,
.navbar.hidden {
  display: none !important;
}