:root {
  --primary-color: #2563eb; /* blue-600 */
  --primary-dark: #1d4ed8; /* blue-700 */
  --primary-light: #3b82f6; /* blue-500 */
  --bg-dark: #001a33; /* Dark Navy for cards/sections */
  --bg-darker: #050505; /* Main bg */
  --text-light: #ffffff;
  --text-dim: #94a3b8; /* slate-400 */
  --black: #000000;
  --white: #ffffff;
  --border-color: rgba(30, 58, 138, 0.3); /* blue-900/30 */
  --border-light: rgba(30, 58, 138, 0.2);
  --font-family: ui-sans-serif, system-ui, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
}

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

body {
  font-family: var(--font-family);
  background-color: var(--bg-darker);
  color: var(--text-light);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  text-decoration: none;
  color: var(--primary-color);
  transition: color 0.3s ease;
}

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

ul {
  list-style: none;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 5%;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  margin-bottom: 1rem;
  line-height: 1.1;
  font-weight: 700;
  color: var(--white);
  letter-spacing: -0.025em; /* tracking-tight */
}

h1 { font-size: 3rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 1.75rem; }

p {
  margin-bottom: 1rem;
  color: var(--text-dim);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 1rem 2rem;
  font-size: 1rem;
  font-weight: 700;
  border-radius: 0.5rem; /* rounded-lg */
  cursor: pointer;
  border: none;
  transition: all 0.2s ease;
  text-align: center;
}

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

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

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

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

/* Header */
header {
  background-color: var(--black);
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 1000;
  border-bottom: 1px solid var(--border-color);
  padding: 0 5%;
  height: 4rem; /* h-16 */
  display: flex;
  align-items: center;
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
}

.logo {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--white);
  letter-spacing: -0.05em; /* tracking-tighter */
  text-transform: uppercase;
}

.logo span {
  /* text-blue-500, but keeping it as primary or white, actually let's keep it primary-color */
  color: var(--primary-color);
}

.nav-links {
  display: flex;
  gap: 2rem;
}

.nav-links a {
  color: var(--text-dim);
  font-size: 0.875rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em; /* tracking-widest */
}

.nav-links a:hover {
  color: var(--primary-light);
}

.hamburger {
  display: none;
  flex-direction: column;
  cursor: pointer;
  gap: 5px;
}

.hamburger span {
  width: 25px;
  height: 3px;
  background-color: var(--white);
  border-radius: 2px;
  transition: all 0.3s ease;
}

/* Modal */
.modal-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.8);
  z-index: 2000;
  justify-content: center;
  align-items: center;
}

.modal-overlay.active {
  display: flex;
}

.modal-content {
  background-color: var(--bg-dark);
  padding: 2.5rem;
  border-radius: 1.5rem; /* rounded-3xl */
  max-width: 500px;
  width: 90%;
  position: relative;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
  border: 1px solid var(--border-color);
}

.close-modal {
  position: absolute;
  top: 15px;
  right: 20px;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text-dim);
}

.close-modal:hover {
  color: var(--white);
}

form.schedule-form {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
  margin-top: 1.5rem;
}

form.schedule-form input,
form.schedule-form select,
form.schedule-form textarea {
  width: 100%;
  padding: 0.8rem;
  background-color: rgba(15, 23, 42, 0.5); /* Slate 900 ish */
  border: 1px solid var(--border-color);
  color: var(--white);
  border-radius: 0.5rem; /* rounded-md or lg */
}

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

/* Main Sections Padding */
section {
  padding: 6rem 0;
}

/* Sections Global */
.section-title {
  text-align: center;
  margin-bottom: 3rem;
}

.section-title h2 {
  font-size: 2.5rem;
}

/* Footer */
footer {
  background-color: var(--black);
  padding: 4rem 0 2rem;
  border-top: 1px solid var(--border-color);
}

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

.footer-col h4 {
  font-size: 0.75rem; /* text-xs */
  text-transform: uppercase;
  font-weight: 700;
  letter-spacing: 0.1em;
  margin-bottom: 1.5rem;
  color: var(--text-dim);
}

.footer-col ul li {
  margin-bottom: 0.75rem;
}

.footer-col a {
  color: var(--text-dim);
}

.footer-col a:hover {
  color: var(--primary-color);
}

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.footer-bottom .legal-links {
  display: flex;
  justify-content: center;
  gap: 2rem;
}

/* Responsive */
@media (max-width: 768px) {
  h1 { font-size: 2.25rem; }
  h2 { font-size: 2rem; }
  
  .hamburger {
    display: flex;
  }
  
  .nav-links {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 70px;
    left: 0;
    width: 100%;
    background-color: var(--bg-dark);
    padding: 2rem;
    gap: 1.5rem;
    text-align: center;
    border-bottom: 1px solid rgba(255,255,255,0.1);
  }
  
  .nav-links.active {
    display: flex;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

/* Common Layouts */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.text-center { text-align: center; }

@media (max-width: 768px) {
  .grid-2, .grid-3 {
    grid-template-columns: 1fr;
  }
}