/* HealthcareDataAI.com Global Styles */

:root {
  /* Colors (from dashboard) */
  --bg: #0f172a;
  --surface: #1e293b;
  --border: #334155;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --accent: #38bdf8;
  --green: #4ade80;
  --red: #f87171;
  --yellow: #fbbf24;
  --purple: #a78bfa;
  --orange: #fb923c;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1;
}

/* Typography */
h1 {
  font-size: 48px;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 16px;
}

h2 {
  font-size: 36px;
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: 16px;
}

h3 {
  font-size: 24px;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: 12px;
}

h4 {
  font-size: 18px;
  font-weight: 600;
  line-height: 1.5;
  margin-bottom: 8px;
}

p {
  margin-bottom: 16px;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.15s;
}

a:hover {
  color: var(--text);
}

/* Navigation */
.nav {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-brand {
  font-size: 18px;
  font-weight: 600;
  color: var(--text);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-brand:hover {
  color: var(--accent);
}

.nav-links {
  display: flex;
  gap: 32px;
  list-style: none;
  align-items: center;
}

.nav-links a {
  color: var(--muted);
  font-size: 14px;
  font-weight: 500;
  transition: color 0.15s;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--accent);
}

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text);
  font-size: 24px;
  cursor: pointer;
}

@media (max-width: 768px) {
  .nav-toggle {
    display: block;
  }

  .nav-links {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: 16px 24px;
    gap: 16px;
  }

  .nav-links.open {
    display: flex;
  }
}

/* Container */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 24px;
}

.container-narrow {
  max-width: 900px;
  margin: 0 auto;
  padding: 24px;
}

/* Hero Section */
.hero {
  text-align: center;
  padding: 80px 24px;
  background: linear-gradient(180deg, var(--surface) 0%, var(--bg) 100%);
  border-bottom: 1px solid var(--border);
}

.hero h1 {
  font-size: 56px;
  margin-bottom: 24px;
}

.hero .tagline {
  font-size: 20px;
  color: var(--muted);
  max-width: 800px;
  margin: 0 auto 32px;
}

.hero .cta-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

@media (max-width: 768px) {
  .hero h1 {
    font-size: 36px;
  }

  .hero .tagline {
    font-size: 16px;
  }
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 12px 24px;
  border-radius: 6px;
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  transition: all 0.15s;
  text-decoration: none;
  border: none;
}

.btn-primary {
  background: var(--accent);
  color: #0f172a;
}

.btn-primary:hover {
  opacity: 0.9;
  color: #0f172a;
}

.btn-secondary {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent);
}

.btn-secondary:hover {
  background: var(--accent);
  color: #0f172a;
}

/* Cards */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin: 48px 0;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 24px;
  transition: border-color 0.15s, transform 0.15s;
}

.card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.card h3 {
  font-size: 18px;
  margin-bottom: 12px;
}

.card p {
  color: var(--muted);
  font-size: 14px;
  margin-bottom: 0;
}

.card .icon {
  font-size: 32px;
  margin-bottom: 12px;
}

/* Project Cards */
.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(400px, 1fr));
  gap: 32px;
  margin: 48px 0;
}

.project-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  transition: border-color 0.15s, transform 0.15s;
}

.project-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
}

.project-card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  background: var(--bg);
}

.project-card-content {
  padding: 24px;
}

.project-card h3 {
  font-size: 20px;
  margin-bottom: 12px;
}

.project-card p {
  color: var(--muted);
  font-size: 14px;
  margin-bottom: 16px;
}

.project-card a {
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
  text-decoration: none;
}

.project-card a:hover {
  color: var(--text);
}

@media (max-width: 768px) {
  .project-grid {
    grid-template-columns: 1fr;
  }
}

/* Section */
.section {
  padding: 80px 0;
  border-bottom: 1px solid var(--border);
}

.section:last-of-type {
  border-bottom: none;
}

.section h2 {
  text-align: center;
  margin-bottom: 16px;
}

.section .subtitle {
  text-align: center;
  color: var(--muted);
  font-size: 16px;
  max-width: 700px;
  margin: 0 auto 48px;
}

/* Footer */
.footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 48px 24px 24px;
  margin-top: auto;
}

.footer-container {
  max-width: 1400px;
  margin: 0 auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 48px;
  margin-bottom: 32px;
}

.footer-section h4 {
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text);
  margin-bottom: 16px;
}

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

.footer-section li {
  margin-bottom: 8px;
}

.footer-section a {
  color: var(--muted);
  font-size: 14px;
  text-decoration: none;
}

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

.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 24px;
  text-align: center;
  color: var(--muted);
  font-size: 13px;
}

.footer-bottom p {
  margin-bottom: 8px;
}

/* Forms */
.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-size: 14px;
  font-family: inherit;
}

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

.form-group textarea {
  resize: vertical;
  min-height: 100px;
}

.form-group select {
  cursor: pointer;
}

/* Stats */
.stat-number {
  font-size: 48px;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 8px;
}

.stat-label {
  font-size: 14px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Badges */
.badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.badge-green {
  background: rgba(74, 222, 128, 0.15);
  color: var(--green);
}

.badge-blue {
  background: rgba(56, 189, 248, 0.15);
  color: var(--accent);
}

.badge-purple {
  background: rgba(167, 139, 250, 0.15);
  color: var(--purple);
}

.badge-orange {
  background: rgba(251, 146, 60, 0.15);
  color: var(--orange);
}

/* Utility Classes */
.text-center {
  text-align: center;
}

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

.text-accent {
  color: var(--accent);
}

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mt-4 { margin-top: 32px; }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.mb-4 { margin-bottom: 32px; }