/* ============================================================
   ALPHINIX — Enhanced Responsive Design
   Mobile-First Approach with Complete Breakpoint Coverage
   ============================================================ */

/* ─── Mobile First: Base (0px - 640px) ─── */
@media (max-width: 640px) {
    /* Typography Scaling */
    :root {
        --container: auto;
    }

    .container {
        padding: 0 1rem;
    }

    /* Buttons */
    .btn {
        width: 100%;
        justify-content: center;
        padding: 0.75rem 1rem;
        font-size: 0.875rem;
    }

    .btn-sm {
        width: auto;
        padding: 0.5rem 1rem;
    }

    .btn-lg {
        padding: 0.75rem 1.5rem;
        font-size: 1rem;
    }

    /* Section Spacing */
    .section {
        padding: 2rem 0;
    }

    .section-sm {
        padding: 1.5rem 0;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .section-desc {
        font-size: 0.9375rem;
    }

    /* Grids to Single Column */
    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    /* Cards */
    .card {
        padding: 1.25rem;
    }

    /* Forms */
    .form-input,
    .form-select,
    .form-textarea {
        padding: 0.65rem 0.75rem;
        font-size: 1rem;
    }

    /* Tables */
    .table-wrap {
        overflow-x: auto;
    }

    .table th,
    .table td {
        padding: 0.75rem 0.5rem;
        font-size: 0.8125rem;
    }

    /* Navbar */
    .navbar {
        height: 3.5rem;
    }

    .navbar-inner {
        gap: 1rem;
    }

    .navbar-logo {
        font-size: 1rem;
    }

    .navbar-nav {
        display: none;
    }

    .navbar-nav.open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 3.5rem;
        left: 0;
        right: 0;
        background: #fff;
        border-bottom: 1px solid var(--color-border);
        padding: 0.5rem;
        gap: 0.25rem;
        box-shadow: var(--shadow-md);
        z-index: 1001;
    }

    .navbar-nav.open li a {
        padding: 0.65rem 0.75rem;
    }

    .navbar-toggle {
        display: flex;
    }

    /* Footer */
    .footer {
        padding: 2.5rem 0 1.5rem;
    }

    .footer-top {
        grid-template-columns: 1fr;
        gap: 1.5rem;
        margin-bottom: 1.5rem;
    }

    .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.75rem;
        font-size: 0.8125rem;
    }

    .footer-socials a {
        width: 2rem;
        height: 2rem;
    }

    /* Spacing utilities */
    .mt-1,
    .mt-2 {
        margin-top: 0.25rem;
    }

    .mt-3,
    .mt-4 {
        margin-top: 0.75rem;
    }

    .mt-5 {
        margin-top: 1.5rem;
    }

    .mb-1,
    .mb-2 {
        margin-bottom: 0.25rem;
    }

    .mb-3,
    .mb-4 {
        margin-bottom: 0.75rem;
    }

    .mb-5 {
        margin-bottom: 1.5rem;
    }

    /* Accessibility */
    body {
        font-size: 16px;
    }
}

/* ─── Tablet: Small (641px - 768px) ─── */
@media (min-width: 641px) and (max-width: 768px) {
    .container {
        padding: 0 1.25rem;
    }

    .grid-3 {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .section {
        padding: 3rem 0;
    }

    .section-title {
        font-size: 2rem;
    }

    .table th,
    .table td {
        padding: 0.875rem 0.75rem;
    }

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

/* ─── Tablet: Medium (769px - 1024px) ─── */
@media (min-width: 769px) and (max-width: 1024px) {
    .container {
        padding: 0 1.5rem;
    }

    .grid-4 {
        grid-template-columns: repeat(3, 1fr);
    }

    .section {
        padding: 4rem 0;
    }

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

    .navbar-nav {
        gap: 0.5rem;
    }

    .table th,
    .table td {
        padding: 0.875rem 1rem;
    }
}

/* ─── Desktop: Small (1025px - 1280px) ─── */
@media (min-width: 1025px) and (max-width: 1280px) {
    :root {
        --container: 64rem;
    }

    .container {
        padding: 0 1.5rem;
    }

    .grid-4 {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* ─── Desktop: Large (1281px+) ─── */
@media (min-width: 1281px) {
    :root {
        --container: 72rem;
    }

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

/* ─── Print Styling ─── */
@media print {
    .navbar,
    .footer,
    .navbar-toggle,
    .btn,
    form {
        display: none;
    }

    .container {
        max-width: 100%;
    }

    body {
        background: #fff;
        color: #000;
    }

    table {
        page-break-inside: avoid;
    }

    tr {
        page-break-inside: avoid;
    }
}

/* ─── High DPI Displays (Retina) ─── */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    img {
        backface-visibility: hidden;
    }
}

/* ─── Landscape Orientation ─── */
@media (max-height: 600px) and (orientation: landscape) {
    .section {
        padding: 1.5rem 0;
    }

    .navbar {
        height: 3rem;
    }
}

/* ─── Touch Devices ─── */
@media (hover: none) and (pointer: coarse) {
    .btn,
    a,
    button {
        padding: 0.75rem 1rem;
        min-height: 44px;
        min-width: 44px;
    }

    .table tbody tr:hover {
        background: transparent;
    }
}

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