/* ===== GLOBALE STYLES ===== */
:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary: #10b981;
    --accent: #f59e0b;
    --danger: #ef4444;
    --dark: #1f2937;
    --light: #f9fafb;
    --gray: #6b7280;
    --gray-light: #e5e7eb;
    --gradient: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.12);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 25px -5px rgba(0,0,0,0.1);
    --shadow-xl: 0 20px 40px -10px rgba(0,0,0,0.15);
    
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: var(--dark);
    line-height: 1.6;
    background: var(--light);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

p {
    margin-bottom: 1rem;
}

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 12px 28px;
    border-radius: var(--radius-md);
    font-weight: 600;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    font-size: 1rem;
}

.btn-primary {
    background: var(--gradient);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

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

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

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

/* ===== CARDS ===== */
.card {
    background: white;
    border-radius: var(--radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--gray-light);
    transition: var(--transition);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.card-header {
    border-bottom: 1px solid var(--gray-light);
    padding-bottom: 1rem;
    margin-bottom: 1.5rem;
}

/* ===== GRIDS ===== */
.grid {
    display: grid;
    gap: 2rem;
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.grid-4 {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

/* ===== FORMS ===== */
.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--dark);
}

.form-control {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--gray-light);
    border-radius: var(--radius-md);
    font-size: 1rem;
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* ===== NAVIGATION ===== */
.main-nav {
    background: white;
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo {
    font-size: 1.75rem;
    font-weight: 800;
    text-decoration: none;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-link {
    text-decoration: none;
    color: var(--dark);
    font-weight: 500;
    transition: var(--transition);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-md);
}

.nav-link:hover {
    background: var(--light);
    color: var(--primary);
}

.nav-link.active {
    background: var(--primary);
    color: white;
}

/* ===== FOOTER ===== */
.main-footer {
    background: var(--dark);
    color: white;
    padding: 4rem 0 2rem;
    margin-top: 4rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-logo {
    font-size: 1.75rem;
    font-weight: 800;
    margin-bottom: 1rem;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.7);
}

/* ===== HERO SECTION ===== */
.hero {
    background: linear-gradient(rgba(31, 41, 55, 0.95), rgba(31, 41, 55, 0.98)), url('https://images.unsplash.com/photo-1497366754035-f200968a6e72?ixlib=rb-4.0.3&auto=format&fit=crop&w=1600&q=80');
    background-size: cover;
    background-position: center;
    color: white;
    padding: 6rem 0;
    text-align: center;
}

.hero-title {
    font-size: 3rem;
    margin-bottom: 1.5rem;
}

.hero-subtitle {
    font-size: 1.25rem;
    opacity: 0.9;
    max-width: 800px;
    margin: 0 auto 2rem;
}

/* ===== MODULE CARDS ===== */
.module-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    padding: 2rem 0;
}

.module-card {
    background: white;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    transition: var(--transition);
    height: 100%;
}

.module-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.module-header {
    background: var(--gradient);
    color: white;
    padding: 1.5rem;
    text-align: center;
}

.module-header h3 {
    margin-bottom: 0.5rem;
    font-size: 1.5rem;
}

.module-body {
    padding: 1.5rem;
}

.module-features {
    list-style: none;
    margin: 1.5rem 0;
}

.module-features li {
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--gray-light);
    display: flex;
    align-items: center;
    gap: 10px;
}

.module-features li:last-child {
    border-bottom: none;
}

.module-features i {
    color: var(--secondary);
}

.module-cta {
    display: block;
    width: 100%;
    text-align: center;
    margin-top: 1.5rem;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .container {
        padding: 0 1rem;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .nav-links {
        display: none;
    }
    
    .module-grid {
        grid-template-columns: 1fr;
    }
    
    .grid-2, .grid-3, .grid-4 {
        grid-template-columns: 1fr;
    }
}

/* ===== MODULE SPECIFIC ===== */
.grid-5 {
    grid-template-columns: repeat(5, 1fr);
}

/* Additional responsive adjustments */
@media (max-width: 1200px) {
    .grid-5 {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .grid-5 {
        grid-template-columns: 1fr;
    }
    
    .language-selector {
        position: relative;
    }
    
    .language-selector select {
        width: 100%;
        padding: 8px;
        font-size: 0.9rem;
    }
}

/* Fix for form controls */
input[type="range"] {
    -webkit-appearance: none;
    width: 100%;
    height: 6px;
    background: var(--gray-light);
    border-radius: 3px;
    outline: none;
    padding: 0;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    background: var(--primary);
    border-radius: 50%;
    cursor: pointer;
    border: 3px solid white;
    box-shadow: var(--shadow-sm);
}

/* Language selector styling */
.language-selector {
    position: relative;
}

.language-selector select {
    padding: 8px 12px;
    border: 2px solid var(--gray-light);
    border-radius: var(--radius-md);
    background: white;
    color: var(--dark);
    font-weight: 600;
    cursor: pointer;
}

.language-selector select:focus {
    outline: none;
    border-color: var(--primary);
}