/* ============================================
   CalcHub - Responsive Styles
   Premium White & Blue Brand Design
   ============================================ */

/* Large Desktop (1280px and up) */
@media (min-width: 1280px) {
    .container {
        padding: 0 var(--spacing-xl);
    }

    .hero h1 {
        font-size: 3.25rem;
    }
}

/* Desktop (1024px - 1279px) */
@media (max-width: 1279px) {
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-xl);
    }

    .footer-brand {
        grid-column: span 2;
    }
}

/* Tablet (768px - 1023px) */
@media (max-width: 1023px) {
    :root {
        --container-padding: 1.5rem;
    }

    .header-inner {
        height: 64px;
    }

    .nav-main {
        display: none;
    }

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

    .search-container {
        display: none;
    }

    .hero {
        padding: var(--spacing-2xl) var(--spacing-lg);
    }

    .hero h1 {
        font-size: 2.25rem;
    }

    .hero p {
        font-size: 1.05rem;
    }

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

    .features-section {
        padding: var(--spacing-2xl);
    }

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

/* Mobile Navigation — hidden until .active is toggled via JS */
.mobile-nav {
    display: none;
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--white);
    padding: var(--spacing-lg);
    z-index: 99;
    overflow-y: auto;
    border-top: 1px solid var(--gray-100);
}

.mobile-nav.active {
    display: block;
}

    .mobile-nav-link {
        display: flex;
        align-items: center;
        gap: var(--spacing-md);
        padding: var(--spacing-md) var(--spacing-lg);
        color: var(--gray-700);
        font-size: 1.05rem;
        font-weight: 500;
        border-radius: var(--radius-lg);
        transition: all var(--transition-fast);
        margin-bottom: 2px;
    }

    .mobile-nav-link:hover {
        color: var(--primary);
        background: var(--primary-50);
    }

    .mobile-nav-link span {
        width: 36px;
        height: 36px;
        display: flex;
        align-items: center;
        justify-content: center;
        background: var(--primary-50);
        color: var(--primary) !important;
        border-radius: var(--radius-md);
        font-weight: 700;
        font-size: 1rem;
    }

    .mobile-search {
        display: block;
        margin-bottom: var(--spacing-lg);
    }

    .mobile-search .search-input {
        width: 100%;
        background: var(--gray-50);
        border-color: var(--gray-200);
    }

    .mobile-search .search-input:focus {
        border-color: var(--primary-300);
        box-shadow: 0 0 0 4px var(--primary-100);
        background: var(--white);
    }
}

/* Large Mobile (640px - 767px) */
@media (max-width: 767px) {
    .hero h1 {
        font-size: 1.875rem;
    }

    .hero p {
        font-size: 1rem;
    }

    .quick-calc {
        max-width: 100%;
    }

    .quick-calc-display {
        font-size: 1.5rem;
        padding: var(--spacing-md);
    }

    .quick-calc-btn {
        padding: 1rem;
        font-size: 1.1rem;
    }

    .categories-grid {
        grid-template-columns: 1fr;
    }

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

    .calculators-grid {
        grid-template-columns: 1fr;
    }

    .section-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }

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

    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }

    .footer-brand {
        grid-column: span 1;
    }

    .footer-bottom {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }

    .footer-legal {
        flex-wrap: wrap;
        justify-content: center;
    }
}

/* Small Mobile (up to 639px) */
@media (max-width: 639px) {
    :root {
        --container-padding: 1rem;
    }

    h1 { font-size: 1.75rem; }
    h2 { font-size: 1.5rem; }
    h3 { font-size: 1.25rem; }

    .hero {
        padding: var(--spacing-xl) var(--spacing-md);
        border-radius: var(--radius-xl);
    }

    .hero h1 {
        font-size: 1.625rem;
    }

    .section-title {
        font-size: 1.375rem;
    }

    .category-links {
        gap: var(--spacing-xs);
    }

    .category-link {
        font-size: 0.8rem;
        padding: 0.2rem 0.6rem;
    }

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

    .calc-card-icon {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }

    .calc-card-content h4 {
        font-size: 0.95rem;
    }

    .features-section {
        padding: var(--spacing-xl);
    }

    .btn {
        padding: 0.625rem 1.25rem;
        font-size: 0.95rem;
    }
}

/* Touch Device Optimizations */
@media (hover: none) and (pointer: coarse) {
    .quick-calc-btn {
        min-height: 52px;
    }

    .nav-link,
    .category-link,
    .calc-card {
        min-height: 44px;
    }

    .category-card:hover,
    .calc-card:hover {
        transform: none;
    }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    html {
        scroll-behavior: auto;
    }
}

/* Print Styles */
@media print {
    .header,
    .footer,
    .mobile-nav,
    .quick-calc,
    .search-container,
    .nav-main,
    .btn {
        display: none !important;
    }

    body {
        background: white;
        color: black;
        font-size: 12pt;
    }

    .container {
        max-width: 100%;
        padding: 0;
    }

    a {
        color: black;
        text-decoration: underline;
    }

    .category-card,
    .calc-card {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid #ccc;
    }
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
    :root {
        --gray-200: #000;
        --gray-400: #000;
        --gray-500: #000;
    }

    .btn,
    .category-link,
    .nav-link {
        border: 2px solid currentColor;
    }
}

/* Landscape Orientation on Mobile */
@media (max-height: 500px) and (orientation: landscape) {
    .hero {
        padding: var(--spacing-lg);
    }

    .hero h1 {
        font-size: 1.5rem;
        margin-bottom: var(--spacing-sm);
    }

    .hero p {
        display: none;
    }

    .quick-calc-display {
        min-height: 50px;
        font-size: 1.25rem;
    }

    .quick-calc-btn {
        padding: 0.75rem;
    }
}