/* ===================================
   RESPONSIVE DESIGN
   Mobile-First Approach
   =================================== */

/* === TABLET (768px - 1199px) === */
@media (max-width: 1199px) {
    .container {
        max-width: 960px;
    }

    .hero .container {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

    .registration-form {
        max-width: 500px;
        margin: 0 auto;
    }

    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* === MOBILE (max-width: 767px) === */
@media (max-width: 767px) {
    :root {
        --text-5xl: 2rem;
        --text-4xl: 1.75rem;
        --text-3xl: 1.5rem;
        --spacing-xl: 2rem;
        --spacing-2xl: 3rem;
    }

    .container {
        padding: 0 var(--spacing-sm);
    }

    /* Header */
    .header-top .container {
        flex-direction: column;
        text-align: center;
    }

    .header-info {
        flex-direction: column;
        gap: var(--spacing-xs);
    }

    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: var(--spacing-md);
        box-shadow: var(--shadow-lg);
    }

    .nav-menu.active {
        display: flex;
    }

    .mobile-menu-toggle {
        display: block;
    }

    /* Hero */
    .hero {
        padding: var(--spacing-xl) 0;
    }

    .hero-features {
        grid-template-columns: 1fr;
    }

    /* Grids */
    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }

    /* Timeline */
    .timeline-item {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .timeline-number {
        width: 50px;
        height: 50px;
        font-size: var(--text-xl);
    }

    /* Footer */
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

    /* Gallery */
    .gallery {
        grid-template-columns: 1fr;
    }

    /* Tables */
    .table-responsive {
        font-size: var(--text-sm);
    }

    th,
    td {
        padding: var(--spacing-xs) var(--spacing-sm);
    }
}

/* === SMALL MOBILE (max-width: 480px) === */
@media (max-width: 480px) {
    .hero-content h1 {
        font-size: 1.75rem;
    }

    .btn {
        padding: var(--spacing-sm);
        font-size: var(--text-sm);
    }

    .card {
        padding: var(--spacing-md);
    }

    .stat-number {
        font-size: var(--text-4xl);
    }
}

/* === LARGE DESKTOP (1200px+) === */
@media (min-width: 1200px) {
    .container {
        max-width: 1200px;
    }
}

/* === EXTRA LARGE DESKTOP (1400px+) === */
@media (min-width: 1400px) {
    .container {
        max-width: 1320px;
    }
}