:root {
  --navy: #0a192f;
  --navy-light: #112240;
  --charcoal: #1e1e2f;
  --gold: #ffd700;
  --gold-dim: rgba(255, 215, 0, 0.15);
  --white: #ffffff;
  --gray: #8892b0;
  --gray-light: #ccd6f6;
  --border: rgba(255, 255, 255, 0.08);
}

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

body {
  font-family: 'DM Sans', sans-serif;
  background: var(--navy);
  color: var(--white);
  min-height: 100vh;
}

.font-syne {
  font-family: 'Syne', sans-serif;
}

.bg-navy { background: var(--navy); }
.bg-navy-light { background: var(--navy-light); }
.bg-charcoal { background: var(--charcoal); }
.bg-gold { background: var(--gold); }
.bg-gold-dim { background: var(--gold-dim); }

.text-gold { color: var(--gold); }
.text-gray { color: var(--gray); }
.text-gray-light { color: var(--gray-light); }

.border-gold { border-color: var(--gold); }

/* Course Cards */
.course-card {
  background: var(--charcoal);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 24px;
  transition: all 0.3s ease;
  cursor: pointer;
}

.course-card:hover {
  border-color: var(--gold);
  transform: translateY(-4px);
  box-shadow: 0 20px 40px -12px rgba(255, 215, 0, 0.15);
}

/* Modal Styles */
.modal {
  background: var(--charcoal);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 32px;
  max-width: 500px;
  width: 100%;
  animation: slideUp 0.3s ease;
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Toast Notifications */
.toast {
  background: var(--charcoal);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  animation: slideIn 0.3s ease;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

.toast.success {
  border-left: 4px solid #10b981;
}

.toast.error {
  border-left: 4px solid #ef4444;
}

.toast.info {
  border-left: 4px solid var(--gold);
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateX(100%);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* Input Styles */
.input-field {
  background: var(--navy-light);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 16px;
  color: var(--white);
  width: 100%;
  transition: all 0.2s;
}

.input-field:focus {
  outline: none;
  border-color: var(--gold);
  box-shadow: 0 0 0 3px var(--gold-dim);
}

.input-field::placeholder {
  color: var(--gray);
}

/* Button Styles */
.btn-primary {
  background: var(--gold);
  color: var(--navy);
  padding: 12px 24px;
  border-radius: 10px;
  font-weight: 700;
  border: none;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-primary:hover {
  background: #e6c200;
  transform: translateY(-1px);
}

.btn-secondary {
  background: transparent;
  color: var(--white);
  padding: 12px 24px;
  border-radius: 10px;
  font-weight: 600;
  border: 1px solid var(--border);
  cursor: pointer;
  transition: all 0.2s;
}

.btn-secondary:hover {
  border-color: var(--gold);
  background: var(--gold-dim);
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--navy);
}

::-webkit-scrollbar-thumb {
  background: var(--charcoal);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--border);
}