/* ===================================
   UniBase - Responsive Styles
   =================================== */

/* Tablet Devices (768px and below) */
@media (max-width: 768px) {

    /* Typography adjustments */
    h1 {
        font-size: var(--font-size-4xl);
    }

    h2 {
        font-size: var(--font-size-3xl);
    }

    h3 {
        font-size: var(--font-size-2xl);
    }

    .hero-title {
        font-size: var(--font-size-4xl);
    }

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

    /* Navigation */
    .mobile-menu-btn {
        display: block;
        z-index: 1001;
    }

    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 400px;
        height: 100vh;
        background: rgba(30, 58, 95, 0.95);
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
        padding: 80px 20px 20px;
        transition: right 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        box-shadow: -5px 0 25px rgba(0, 0, 0, 0.3);
        z-index: 1000;
        overflow-y: auto;
    }

    .nav-menu.active {
        right: 0;
    }

    .nav-menu ul {
        flex-direction: column;
        gap: var(--spacing-md);
        width: 100%;
        align-items: flex-start;
    }

    .nav-menu a {
        display: block;
        width: 100%;
        padding: 12px 16px;
        font-size: var(--font-size-base);
        margin-bottom: var(--spacing-xs);
        border-radius: var(--radius-md);
        /* Less rounded on mobile for stackability */
    }

    .header-container {
        justify-content: space-between;
    }

    /* Logo responsive */
    .logo-img {
        height: 35px;
        width: 35px;
    }

    .logo-text {
        font-size: var(--font-size-xl);
    }

    /* Auth links responsive */
    .auth-links {
        width: 100%;
        justify-content: center;
        gap: var(--spacing-sm);
    }

    /* Hero section */
    .hero-actions {
        flex-direction: column;
    }

    /* Stats grid */
    .stats-grid {
        grid-template-columns: 1fr;
    }

    /* Footer */
    .footer-content {
        flex-direction: column;
        text-align: center;
    }

    .footer-links {
        flex-direction: column;
        gap: var(--spacing-md);
    }

    /* Spacing adjustments */
    .section {
        padding: var(--spacing-2xl) 0;
    }

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

/* Mobile Devices (480px and below) */
@media (max-width: 480px) {

    /* Further typography adjustments */
    h1 {
        font-size: var(--font-size-3xl);
    }

    h2 {
        font-size: var(--font-size-2xl);
    }

    .hero-title {
        font-size: var(--font-size-3xl);
    }

    .hero-subtitle {
        font-size: var(--font-size-base);
    }

    /* Logo mobile */
    .logo-img {
        height: 30px;
        width: 30px;
    }

    .logo-text {
        font-size: var(--font-size-lg);
    }

    /* Auth buttons mobile */
    .auth-links {
        flex-direction: row;
        gap: var(--spacing-sm);
        width: 100%;
    }

    .auth-links .btn {
        flex: 1;
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: var(--font-size-sm);
    }

    /* Buttons */
    .btn {
        width: 100%;
        padding: var(--spacing-md);
    }

    .hero-actions .btn {
        width: 100%;
    }

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

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

    /* Question container */
    .question-container {
        padding: var(--spacing-lg);
    }

    .question-text {
        font-size: var(--font-size-base);
    }

    /* Timer */
    .timer {
        font-size: var(--font-size-xl);
        min-width: 150px;
    }

    /* Forms */
    .form-input,
    .form-select,
    .form-textarea {
        font-size: var(--font-size-base);
    }
}