/* PeptideUses.com - Clean Professional Design */

:root {
  --blue: #2563eb;
  --blue-dark: #1d4ed8;
  --blue-light: #dbeafe;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;
  --red: #dc2626;
  --red-light: #fef2f2;
  --max-width: 900px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-size: 17px;
  line-height: 1.7;
  color: var(--gray-800);
  background: white;
}

/* Header */
header {
  border-bottom: 1px solid var(--gray-200);
  padding: 20px 0;
}

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

.logo {
  font-size: 20px;
  font-weight: 700;
  color: var(--gray-900);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-icon {
  width: 32px;
  height: 32px;
  background: var(--blue);
  color: white;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
}

/* Navigation */
nav {
  display: flex;
  gap: 32px;
}

nav a {
  color: var(--gray-600);
  text-decoration: none;
  font-size: 15px;
  font-weight: 500;
}

nav a:hover {
  color: var(--blue);
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  font-size: 24px;
  cursor: pointer;
}

/* Main Content */
main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 48px 24px;
  min-height: 60vh;
}

/* Typography */
h1 {
  font-size: 38px;
  font-weight: 800;
  line-height: 1.2;
  color: var(--gray-900);
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

h2 {
  font-size: 26px;
  font-weight: 700;
  color: var(--gray-900);
  margin: 48px 0 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--gray-100);
}

h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--gray-800);
  margin: 32px 0 12px;
}

p {
  margin-bottom: 20px;
  color: var(--gray-700);
}

p.lead {
  font-size: 20px;
  color: var(--gray-600);
  line-height: 1.6;
  margin-bottom: 32px;
}

/* Links */
a {
  color: var(--blue);
  text-decoration: underline;
  text-underline-offset: 2px;
}

a:hover {
  color: var(--blue-dark);
}

/* Lists */
ul, ol {
  margin: 20px 0;
  padding-left: 28px;
}

li {
  margin-bottom: 10px;
  color: var(--gray-700);
}

/* Tables */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-size: 15px;
}

th, td {
  padding: 12px 16px;
  text-align: left;
  border: 1px solid var(--gray-200);
}

th {
  background: var(--gray-50);
  font-weight: 600;
  color: var(--gray-800);
}

tr:nth-child(even) {
  background: var(--gray-50);
}

/* Disclaimer */
.disclaimer {
  background: var(--red-light);
  border-left: 4px solid var(--red);
  padding: 16px 20px;
  margin: 32px 0;
  font-size: 15px;
}

.disclaimer strong {
  color: var(--red);
  display: block;
  margin-bottom: 4px;
}

/* Home Page */
.hero {
  background: var(--gray-900);
  color: white;
  padding: 80px 24px;
  margin: -48px -24px 64px;
}

.hero h1 {
  color: white;
  font-size: 42px;
  max-width: 700px;
}

.hero p {
  color: #9ca3af;
  font-size: 20px;
  max-width: 600px;
}

.hero-buttons {
  margin-top: 32px;
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 14px 28px;
  background: var(--blue);
  color: white;
  text-decoration: none;
  border-radius: 6px;
  font-weight: 600;
  font-size: 16px;
  border: none;
  cursor: pointer;
}

.btn:hover {
  background: var(--blue-dark);
  color: white;
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--gray-600);
  color: white;
}

.btn-outline:hover {
  border-color: white;
  background: rgba(255,255,255,0.1);
  color: white;
}

/* Article List */
.article-list {
  list-style: none;
  padding: 0;
  margin: 24px 0;
}

.article-list li {
  border-bottom: 1px solid var(--gray-200);
  margin: 0;
}

.article-list a {
  display: block;
  padding: 20px 0;
  text-decoration: none;
  color: var(--gray-800);
  font-weight: 500;
  font-size: 18px;
}

.article-list a:hover {
  color: var(--blue);
}

.article-list p {
  color: var(--gray-600);
  font-size: 15px;
  margin: 4px 0 0;
}

/* Grid Layouts */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin: 32px 0;
}

.card {
  border: 1px solid var(--gray-200);
  border-radius: 8px;
  padding: 24px;
  text-decoration: none;
  color: inherit;
  transition: all 0.15s;
}

.card:hover {
  border-color: var(--blue);
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}

.card h3 {
  font-size: 18px;
  margin: 0 0 8px;
  color: var(--gray-900);
}

.card p {
  font-size: 15px;
  color: var(--gray-600);
  margin: 0;
}

/* Drug List */
.drug-list {
  display: grid;
  gap: 12px;
  margin: 24px 0;
}

.drug-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px;
  border: 1px solid var(--gray-200);
  border-radius: 8px;
  text-decoration: none;
  color: inherit;
}

.drug-item:hover {
  border-color: var(--blue);
}

.drug-item h4 {
  font-size: 17px;
  margin: 0 0 4px;
  color: var(--gray-900);
}

.drug-item span {
  font-size: 14px;
  color: var(--gray-600);
}

.drug-item .arrow {
  color: var(--gray-400);
  font-size: 20px;
}

.drug-item:hover .arrow {
  color: var(--blue);
}

/* Tags */
.tag {
  display: inline-block;
  padding: 4px 12px;
  background: var(--blue-light);
  color: var(--blue-dark);
  border-radius: 100px;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  text-decoration: none;
}

/* Footer */
footer {
  background: var(--gray-50);
  border-top: 1px solid var(--gray-200);
  padding: 48px 24px;
  margin-top: 80px;
}

footer .container {
  max-width: var(--max-width);
  margin: 0 auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 48px;
  margin-bottom: 48px;
}

.footer-section h4 {
  font-size: 14px;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.footer-section p {
  font-size: 15px;
  color: var(--gray-600);
}

.footer-section a {
  display: block;
  color: var(--gray-600);
  text-decoration: none;
  padding: 6px 0;
  font-size: 15px;
}

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

.footer-bottom {
  border-top: 1px solid var(--gray-200);
  padding-top: 24px;
  text-align: center;
  font-size: 14px;
  color: var(--gray-600);
}

/* Responsive */
@media (max-width: 768px) {
  nav {
    display: none;
  }
  
  .mobile-menu-btn {
    display: block;
  }
  
  h1 {
    font-size: 28px;
  }
  
  h2 {
    font-size: 22px;
  }
  
  .hero {
    padding: 48px 24px;
  }
  
  .hero h1 {
    font-size: 32px;
  }
  
  .grid {
    grid-template-columns: 1fr;
  }
  
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

@media (max-width: 480px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

/* Utility */
.text-center { text-align: center; }
.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 32px; }
.mt-3 { margin-top: 32px; }