:root {
    --primary-color: #10b981;
    --secondary-color: #0d9488;
    --success-color: #10b981;
    --text-dark: #1f2937;
    --text-muted: #6b7280;
    --border-color: #e5e7eb;
}

html, body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    color: var(--text-dark);
}

a {
    color: var(--success-color);
    text-decoration: none;
    transition: color 0.2s ease;
}

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

/* Hero Section */
.hero-section {
    background: linear-gradient(135deg, #f0fdfa 0%, #ffffff 50%, #f0fdfa 100%);
    min-height: 80vh;
    display: flex;
    align-items: center;
}

.min-vh-75 {
    min-height: 75vh;
}

/* Buttons */
.btn {
    transition: all 0.3s ease;
    font-weight: 500;
}

.btn-success {
    background-color: var(--success-color);
    border-color: var(--success-color);
}

.btn-success:hover {
    background-color: var(--secondary-color);
    border-color: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

.btn-outline-success:hover {
    background-color: var(--success-color);
    border-color: var(--success-color);
    transform: translateY(-2px);
}

/* Cards */
.card {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border-radius: 1rem;
}

.card:hover {
    transform: translateY(-5px);
}

/* Form Controls */
.form-control {
    border-radius: 0.75rem;
    border: 2px solid var(--border-color);
    padding: 0.75rem 1rem;
    transition: all 0.3s ease;
}

.form-control:focus {
    border-color: var(--success-color);
    box-shadow: 0 0 0 0.2rem rgba(16, 185, 129, 0.15);
}

.form-control-lg {
    padding: 1rem 1.25rem;
    font-size: 1.1rem;
}

/* Alerts */
.alert {
    border-radius: 1rem;
}

/* Navbar */
.navbar {
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.nav-link {
    font-weight: 500;
    transition: color 0.2s ease;
    position: relative;
}

.nav-link:hover {
    color: var(--success-color);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background-color: var(--success-color);
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 80%;
}

/* Typography */
.display-1, .display-2, .display-3, .display-4, .display-5, .display-6 {
    font-weight: 800;
    line-height: 1.2;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

/* Shadows */
.shadow-sm {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05) !important;
}

.shadow {
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08) !important;
}

.shadow-lg {
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.12) !important;
}

/* Loading Spinner */
.spinner-border {
    width: 1.5rem;
    height: 1.5rem;
    border-width: 0.2em;
}

/* Responsive Adjustments */
@media (max-width: 768px) {
    .display-3 {
        font-size: 2.5rem;
    }
    
    .display-4 {
        font-size: 2rem;
    }
    
    .btn-lg {
        padding: 0.75rem 1.5rem;
        font-size: 1rem;
    }
}

/* Accessibility */
:focus-visible {
    outline: 3px solid rgba(16, 185, 129, 0.5);
    outline-offset: 2px;
}

/* Skip to content link for accessibility */
.skip-to-content {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--success-color);
    color: white;
    padding: 8px 16px;
    z-index: 100;
    text-decoration: none;
    border-radius: 0 0 4px 0;
}

.skip-to-content:focus {
    top: 0;
}