@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=PT+Serif:ital,wght@0,400;0,700;1,400&display=swap');

:root {
  --blue: #2563eb;
  --blue-dark: #1d4ed8;
  --blue-light: #dbeafe;
  --white: #ffffff;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;
  --radius: 12px;
  --max-w: 1200px;
  --font-sans: 'Inter', -apple-system, system-ui, sans-serif;
  --font-serif: 'PT Serif', Georgia, serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-serif);
  color: var(--gray-800);
  background: var(--white);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-sans);
  font-weight: 700;
  line-height: 1.25;
  color: var(--gray-900);
}

a { color: var(--blue); text-decoration: none; transition: color .2s; }
a:hover { color: var(--blue-dark); }

img { max-width: 100%; height: auto; display: block; }
.container { max-width: var(--max-w); margin: 0 auto; padding: 0 24px; }

/* Header */
.header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,.95); backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--gray-200);
}
.header .container {
  display: flex; align-items: center; justify-content: space-between;
  height: 72px;
}
.logo {
  font-family: var(--font-sans);
  font-size: 20px; font-weight: 800; color: var(--gray-900);
}
.logo span { color: var(--blue); }
.nav { display: flex; gap: 32px; align-items: center; }
.nav a {
  font-family: var(--font-sans);
  font-size: 14px; font-weight: 500; color: var(--gray-600);
  letter-spacing: .3px;
}
.nav a:hover,
.nav a.active { color: var(--blue); }
.nav-cta {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--blue); color: var(--white) !important;
  padding: 8px 20px; border-radius: 8px; font-weight: 600; font-size: 14px;
}
.nav-cta:hover { background: var(--blue-dark) !important; color: var(--white) !important; }

.mobile-toggle { display: none; flex-direction: column; gap: 5px; cursor: pointer; background: none; border: none; padding: 4px; }
.mobile-toggle span { display: block; width: 24px; height: 2px; background: var(--gray-800); border-radius: 2px; transition: .3s; }

/* Hero */
.hero {
  padding: 100px 0 80px;
  background: linear-gradient(135deg, var(--gray-50) 0%, var(--white) 100%);
  position: relative; overflow: hidden;
}
.hero::before {
  content: ''; position: absolute; top: -50%; right: -20%;
  width: 600px; height: 600px; border-radius: 50%;
  background: radial-gradient(circle, rgba(37,99,235,.05) 0%, transparent 70%);
}
.hero .container { position: relative; display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.hero-content h1 {
  font-size: 48px; margin-bottom: 20px; letter-spacing: -.5px;
}
.hero-content h1 span { color: var(--blue); }
.hero-content p {
  font-size: 18px; color: var(--gray-600); margin-bottom: 32px;
  max-width: 500px;
}
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-sans); font-size: 13px; font-weight: 600;
  color: var(--blue); background: var(--blue-light);
  padding: 6px 14px; border-radius: 50px; margin-bottom: 20px;
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-sans); font-size: 15px; font-weight: 600;
  padding: 14px 28px; border-radius: 10px; border: none; cursor: pointer;
  transition: all .2s;
}
.btn-primary { background: var(--blue); color: var(--white); }
.btn-primary:hover { background: var(--blue-dark); color: var(--white); }
.btn-outline { background: transparent; color: var(--gray-700); border: 2px solid var(--gray-300); }
.btn-outline:hover { border-color: var(--blue); color: var(--blue); }
.hero-image {
  display: flex; justify-content: center; align-items: center;
}
.hero-image-placeholder {
  width: 320px; height: 320px; border-radius: 50%;
  background: linear-gradient(135deg, var(--blue-light), var(--blue));
  display: flex; align-items: center; justify-content: center;
  font-size: 120px; color: var(--white); font-family: var(--font-serif);
  font-weight: 700; box-shadow: 0 20px 60px rgba(37,99,235,.2);
}

/* Section common */
.section { padding: 80px 0; }
.section-header { text-align: center; margin-bottom: 56px; }
.section-header h2 {
  font-size: 36px; margin-bottom: 12px;
}
.section-header p {
  font-size: 17px; color: var(--gray-500); max-width: 600px; margin: 0 auto;
}

/* Directions */
.directions { background: var(--gray-50); }
.directions-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
}
.direction-card {
  background: var(--white); border-radius: var(--radius); padding: 32px 24px;
  text-align: center; border: 1px solid var(--gray-200);
  transition: all .3s;
}
.direction-card:hover {
  border-color: var(--blue); box-shadow: 0 8px 30px rgba(37,99,235,.1);
  transform: translateY(-4px);
}
.direction-icon {
  width: 56px; height: 56px; border-radius: 14px;
  background: var(--blue-light); display: flex; align-items: center;
  justify-content: center; margin: 0 auto 16px;
  font-size: 24px;
}
.direction-card h3 {
  font-size: 18px; margin-bottom: 8px;
}
.direction-card p {
  font-size: 14px; color: var(--gray-500); font-family: var(--font-sans);
}

/* Stats */
.stats-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px;
  text-align: center;
}
.stat-value {
  font-family: var(--font-sans); font-size: 52px; font-weight: 800;
  color: var(--blue); line-height: 1;
}
.stat-label {
  font-size: 16px; color: var(--gray-500); margin-top: 8px;
  font-family: var(--font-sans);
}

/* Testimonials */
.testimonials { background: var(--gray-50); }
.testimonials-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
}
.testimonial-card {
  background: var(--white); border-radius: var(--radius); padding: 32px;
  border: 1px solid var(--gray-200);
}
.testimonial-text {
  font-size: 15px; font-style: italic; color: var(--gray-700);
  margin-bottom: 16px; line-height: 1.8;
}
.testimonial-author { font-family: var(--font-sans); font-weight: 600; font-size: 14px; color: var(--gray-900); }
.testimonial-role { font-family: var(--font-sans); font-size: 12px; color: var(--gray-400); }
.testimonial-stars { color: #f59e0b; font-size: 14px; margin-bottom: 12px; }

/* CTA */
.cta {
  background: var(--blue);
  padding: 80px 0; text-align: center;
}
.cta h2 { color: var(--white); font-size: 36px; margin-bottom: 12px; }
.cta p { color: rgba(255,255,255,.8); font-size: 17px; margin-bottom: 32px; }
.cta .btn { background: var(--white); color: var(--blue); }
.cta .btn:hover { background: var(--gray-100); }

/* Publications list (About page) */
.publications { list-style: none; }
.publications li {
  padding: 16px 0; border-bottom: 1px solid var(--gray-200);
  display: flex; align-items: center; gap: 12px;
}
.publications li::before {
  content: '→'; color: var(--blue); font-weight: 700;
  font-family: var(--font-sans);
}

/* Contact */
.contact-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 60px;
}
.contact-info h3 { font-size: 24px; margin-bottom: 16px; }
.contact-info p { color: var(--gray-600); margin-bottom: 24px; }
.contact-detail { display: flex; gap: 12px; margin-bottom: 16px; }
.contact-detail-icon {
  width: 40px; height: 40px; border-radius: 10px;
  background: var(--blue-light); display: flex; align-items: center;
  justify-content: center; flex-shrink: 0; font-size: 16px;
}
.contact-detail h4 { font-family: var(--font-sans); font-size: 14px; font-weight: 600; }
.contact-detail p { font-size: 14px; margin: 0; font-family: var(--font-sans); }
.form-group { margin-bottom: 20px; }
.form-group label {
  display: block; font-family: var(--font-sans); font-size: 14px;
  font-weight: 600; color: var(--gray-700); margin-bottom: 6px;
}
.form-group input,
.form-group textarea,
.form-group select {
  width: 100%; padding: 12px 16px; border: 1px solid var(--gray-300);
  border-radius: 8px; font-family: var(--font-sans); font-size: 15px;
  color: var(--gray-800); transition: border .2s;
  background: var(--white);
}
.form-group input:focus,
.form-group textarea:focus { outline: none; border-color: var(--blue); box-shadow: 0 0 0 3px rgba(37,99,235,.1); }
.form-group textarea { min-height: 140px; resize: vertical; }

/* Page header */
.page-header {
  padding: 60px 0 40px; background: var(--gray-50);
  border-bottom: 1px solid var(--gray-200);
}
.page-header h1 { font-size: 40px; }
.page-header p { color: var(--gray-500); font-size: 17px; margin-top: 8px; }

/* About content */
.about-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: start;
}
.about-text p { font-size: 16px; color: var(--gray-700); margin-bottom: 16px; }
.about-experience {
  background: var(--gray-50); border-radius: var(--radius); padding: 32px;
  border: 1px solid var(--gray-200);
}
.about-experience h3 {
  font-size: 20px; margin-bottom: 20px;
}
.exp-item { margin-bottom: 24px; }
.exp-item:last-child { margin-bottom: 0; }
.exp-title { font-family: var(--font-sans); font-weight: 700; font-size: 16px; }
.exp-site { font-size: 14px; color: var(--blue); font-family: var(--font-sans); display: block; margin: 2px 0 4px; }
.exp-desc { font-size: 14px; color: var(--gray-500); font-family: var(--font-sans); }

/* Footer */
.footer {
  background: var(--gray-900); color: rgba(255,255,255,.7); padding: 48px 0 24px;
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 48px; margin-bottom: 32px; }
.footer-brand .logo { color: var(--white); margin-bottom: 12px; display: inline-block; }
.footer-brand p { font-size: 14px; max-width: 320px; }
.footer h4 { color: var(--white); font-size: 14px; font-weight: 600; margin-bottom: 16px; text-transform: uppercase; letter-spacing: .5px; }
.footer-links { list-style: none; }
.footer-links li { margin-bottom: 8px; }
.footer-links a { color: rgba(255,255,255,.6); font-size: 14px; font-family: var(--font-sans); }
.footer-links a:hover { color: var(--white); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.1); padding-top: 20px;
  font-size: 13px; text-align: center;
  font-family: var(--font-sans);
}

/* Toast */
.toast {
  position: fixed; bottom: 24px; right: 24px; z-index: 999;
  background: #10b981; color: #fff; padding: 14px 24px;
  border-radius: 10px; font-family: var(--font-sans); font-size: 14px;
  font-weight: 600; box-shadow: 0 8px 30px rgba(0,0,0,.15);
  transform: translateY(100px); opacity: 0; transition: all .4s;
}
.toast.show { transform: translateY(0); opacity: 1; }

/* Responsive */
@media (max-width: 992px) {
  .hero .container { grid-template-columns: 1fr; text-align: center; }
  .hero-content p { margin: 0 auto 32px; }
  .hero-actions { justify-content: center; }
  .hero-image { display: none; }
  .directions-grid { grid-template-columns: repeat(2, 1fr); }
  .testimonials-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .about-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}
@media (max-width: 768px) {
  .nav { display: none; }
  .mobile-toggle { display: flex; }
  .nav.open { display: flex; flex-direction: column; position: absolute; top: 72px; left: 0; right: 0; background: var(--white); padding: 24px; border-bottom: 1px solid var(--gray-200); gap: 16px; }
  .hero-content h1 { font-size: 32px; }
  .directions-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr; gap: 24px; }
  .section-header h2 { font-size: 28px; }
  .page-header h1 { font-size: 28px; }
  .footer-grid { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  .hero { padding: 60px 0 40px; }
  .hero-content h1 { font-size: 28px; }
  .container { padding: 0 16px; }
  .btn { width: 100%; justify-content: center; }
}