/* LumiDerm - Educational Skincare Information Resource */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --gradient-start: #a1c4fd;
  --gradient-end: #c2e9fb;
  --bg-light: #f8f9fa;
  --text-dark: #2c3e50;
  --text-muted: #6c757d;
  --white: #ffffff;
  --border-light: #e9ecef;
  --accent-green: #4ecdc4;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  line-height: 1.6;
  color: var(--text-dark);
  background: var(--bg-light);
}

/* Header */
header {
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  padding: 1rem 0;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--white);
  text-decoration: none;
}

nav ul {
  list-style: none;
  display: flex;
  gap: 2rem;
}

nav a {
  color: var(--white);
  text-decoration: none;
  font-weight: 500;
  transition: opacity 0.3s;
}

nav a:hover {
  opacity: 0.8;
}

/* Hero */
.hero {
  position: relative;
  height: 500px;
  background-size: cover;
  background-position: center;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(161, 196, 253, 0.7), rgba(194, 233, 251, 0.7));
}

.hero-content {
  position: relative;
  text-align: center;
  color: var(--white);
  max-width: 800px;
  padding: 0 1.5rem;
}

.hero h1 {
  font-size: 3rem;
  font-weight: 700;
  margin-bottom: 1rem;
  text-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.hero p {
  font-size: 1.25rem;
  text-shadow: 0 1px 2px rgba(0,0,0,0.1);
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 4rem 1.5rem;
}

/* Section */
.section {
  margin-bottom: 4rem;
}

.section h2 {
  font-size: 2rem;
  margin-bottom: 1.5rem;
  color: var(--text-dark);
}

.section h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: var(--text-dark);
}

.section p {
  margin-bottom: 1rem;
  line-height: 1.8;
  color: var(--text-muted);
}

.section ul {
  margin: 1rem 0 1rem 2rem;
  color: var(--text-muted);
}

.section li {
  margin-bottom: 0.5rem;
}

/* Card */
.card {
  background: var(--white);
  border-radius: 12px;
  padding: 2rem;
  box-shadow: 0 4px 12px rgba(0,0,0,0.05);
  margin-bottom: 2rem;
}

.card img {
  width: 100%;
  height: auto;
  border-radius: 8px;
  margin-bottom: 1.5rem;
}

/* Table */
table {
  width: 100%;
  border-collapse: collapse;
  background: var(--white);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 12px rgba(0,0,0,0.05);
  margin: 2rem 0;
}

thead {
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  color: var(--white);
}

th, td {
  padding: 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border-light);
}

tbody tr:last-child td {
  border-bottom: none;
}

tbody tr:hover {
  background: var(--bg-light);
}

/* CTA */
.cta {
  text-align: center;
  padding: 3rem 0;
}

.cta-button {
  display: inline-block;
  padding: 1rem 2rem;
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  color: var(--white);
  text-decoration: none;
  border-radius: 8px;
  font-weight: 600;
  transition: transform 0.3s, box-shadow 0.3s;
  box-shadow: 0 4px 12px rgba(161, 196, 253, 0.3);
}

.cta-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(161, 196, 253, 0.4);
}

/* Disclaimer */
.disclaimer {
  background: #fff9e6;
  border-left: 4px solid #ffc107;
  padding: 1.5rem;
  border-radius: 8px;
  margin: 3rem 0;
}

.disclaimer h3 {
  color: #856404;
  margin-bottom: 1rem;
}

.disclaimer p {
  color: #856404;
  margin-bottom: 0.5rem;
}

/* FAQ */
.faq-item {
  background: var(--white);
  border-radius: 8px;
  padding: 1.5rem;
  margin-bottom: 1rem;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.faq-item h4 {
  color: var(--text-dark);
  margin-bottom: 0.5rem;
}

.faq-item p {
  color: var(--text-muted);
}

/* Form */
.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--text-dark);
  font-weight: 500;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.75rem;
  border: 2px solid var(--border-light);
  border-radius: 8px;
  font-size: 1rem;
  transition: border-color 0.3s;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--gradient-start);
}

.form-group textarea {
  resize: vertical;
  min-height: 150px;
}

.btn-submit {
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  color: var(--white);
  padding: 0.75rem 2rem;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.3s, box-shadow 0.3s;
}

.btn-submit:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(161, 196, 253, 0.4);
}

/* Footer */
footer {
  background: var(--text-dark);
  color: var(--white);
  padding: 3rem 0 1rem;
  margin-top: 4rem;
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-section h4 {
  margin-bottom: 1rem;
  color: var(--white);
}

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

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

.footer-section a {
  color: rgba(255,255,255,0.8);
  text-decoration: none;
  transition: color 0.3s;
}

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

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid rgba(255,255,255,0.1);
  color: rgba(255,255,255,0.6);
}

/* Responsive */
@media (max-width: 768px) {
  .header-container {
    flex-direction: column;
    gap: 1rem;
  }
  
  nav ul {
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
  }
  
  .hero h1 {
    font-size: 2rem;
  }
  
  .hero p {
    font-size: 1rem;
  }
  
  .container {
    padding: 2rem 1rem;
  }
  
  table {
    font-size: 0.9rem;
  }
  
  th, td {
    padding: 0.75rem 0.5rem;
  }
}