/* =====================================================
   DESKTOP RESPONSIVE STYLES — Navodayam Library
   Breakpoints: ≥768px (tablet), ≥1024px (desktop)
   ===================================================== */

/* ── Tablet & Up ──────────────────────────────────── */
@media (min-width: 768px) {

    /* Allow text to scale, unpin overflow-hidden */
    body {
        height: auto;
        min-height: 100vh;
        overflow: hidden;
        /* keep managed by inner layout */
    }

    /* ── Header ── */
    .app-header {
        padding-left: 24px;
        padding-right: 24px;
        grid-template-columns: 56px 1fr 56px;
    }

    /* ── Content max-width wrapper ── */
    main {
        padding-bottom: calc(100px + env(safe-area-inset-bottom));
    }

    /* wider modal */
    .modal-content {
        max-width: 480px !important;
    }

    /* ── Book grid on tablet ── */
    .book-list {
        display: grid !important;
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }

    /* keep the load-more btn spanning full width */
    .book-list>.w-100 {
        grid-column: 1 / -1;
    }

    /* Genre grid — 4 columns */
    .genre-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    /* keep "browse all" spanning last two */
    .genre-grid .genre-card:last-child {
        grid-column: span 2;
    }

    /* map shelf hover */
    .map-shelf:hover {
        transform: scale(1.03);
        cursor: default;
    }
}


/* ── Desktop (wide) ───────────────────────────────── */
@media (min-width: 1024px) {

    /* ── Base layout: header + sidebar + content ── */
    body {
        display: grid;
        grid-template-rows: auto 1fr;
        grid-template-columns: 240px 1fr 240px;
        grid-template-areas:
            "header  header  header"
            "sidebar content .";
        height: 100vh;
        overflow: hidden;
        background: var(--bg-color);
    }

    /* Fixed Layout Fix for components that should span full width (like login) */
    .login-container,
    #admin-login-screen {
        grid-column: 1 / -1;
        grid-row: 2;
        z-index: 10;
        background: radial-gradient(circle at top right, rgba(14, 116, 144, 0.05), transparent),
            radial-gradient(circle at bottom left, rgba(8, 51, 68, 0.03), transparent);
    }

    /* ── Header spans full width ── */
    .app-header {
        grid-area: header;
        position: relative;
        /* Remove fixed position so it sits in grid row 1 */
        display: grid;
        grid-template-columns: 240px 1fr 240px;
        /* Balanced side columns matching sidebar/spacer */
        padding-left: 20px;
        padding-right: 20px;
        height: 80px;
        /* Explicit desktop height */
        background: rgba(255, 255, 255, 0.98);
        border-bottom: 1px solid rgba(8, 51, 68, 0.08);
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.02);
        z-index: 100;
    }

    .app-title {
        font-size: 20px;
        letter-spacing: 3px;
        font-weight: 800;
    }

    /* ── Sidebar Navigation ── */
    .bottom-nav {
        grid-area: sidebar;
        position: static;
        bottom: unset;
        left: unset;
        right: unset;
        flex-direction: column;
        justify-content: flex-start;
        align-items: stretch;
        border-radius: 0;
        padding: 32px 18px;
        gap: 8px;
        background: linear-gradient(180deg, #ffffff 0%, #f9fafb 100%);
        border-right: 1px solid var(--border-color);
        border-top: none;
        box-shadow: 4px 0 24px rgba(8, 51, 68, 0.02);
        height: 100%;
        overflow-y: auto;
        transition: width 0.3s ease;
    }

    .nav-item {
        flex-direction: row;
        justify-content: flex-start;
        font-size: 14px;
        font-weight: 600;
        padding: 12px 16px;
        border-radius: 14px;
        min-width: unset;
        gap: 14px;
        text-align: left;
        border: 1px solid transparent;
    }

    .nav-icon {
        font-size: 20px;
        margin-bottom: 0;
        flex-shrink: 0;
    }

    .nav-item.active {
        background: rgba(8, 51, 68, 0.08);
        color: var(--primary-color);
    }

    /* Sidebar Branding Area label */
    .bottom-nav::before {
        content: "LIBRARY EXPLORER";
        display: block;
        font-size: 11px;
        font-weight: 800;
        letter-spacing: 2.5px;
        color: var(--primary-light);
        padding: 0 16px 20px 16px;
        margin-bottom: 20px;
        border-bottom: 2px solid #f1f5f9;
        opacity: 0.8;
    }

    /* Fixed Layout Fix for components that should span full width (like login) */
    .login-container,
    #admin-login-screen {
        grid-column: 1 / -1 !important;
        grid-row: 1 / -1 !important;
        /* Take up header + content rows */
        z-index: 1000 !important;
        position: fixed !important;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: radial-gradient(circle at top right, rgba(14, 116, 144, 0.05), transparent),
            white !important;
        display: flex;
        /* Remove !important so JS can hide it after login */
        align-items: center;
        justify-content: center;
    }

    /* Admin App Sub-Grid Logic */
    #admin-app {
        grid-column: 1 / -1;
        grid-row: 2;
        display: grid !important;
        grid-template-columns: 240px 1fr !important;
        grid-template-areas: "sidebar content";
        height: 100%;
        width: 100%;
        overflow: hidden;
    }

    #admin-app .bottom-nav {
        grid-area: sidebar !important;
    }

    #admin-app #app-content {
        grid-area: content !important;
        padding-top: 0 !important;
    }

    /* ── Main Content ── */
    main {
        grid-area: content;
        overflow: hidden;
        padding: 0;
        height: 100%;
    }

    /* Inner content max width + centering */
    .view {
        max-width: 1000px;
        margin: 0 auto;
        padding: 40px 40px 80px 40px;
        /* Increased bottom padding for footer clearance */
        height: 100%;
    }

    /* Book grid — 3 columns on large desktop */
    .book-list {
        grid-template-columns: repeat(3, 1fr) !important;
        gap: 24px;
    }

    /* Genre grid — 4 columns */
    .genre-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    /* Welcome view — centered hero */
    #welcome-view.active-view {
        min-height: calc(100vh - 80px);
        padding: 0 40px !important;
        background: radial-gradient(circle at 50% 50%, rgba(14, 114, 144, 0.03) 0%, transparent 70%);
        display: flex;
        flex-direction: column;
        align-items: center;
        overflow-y: auto;
    }

    #welcome-view > div:first-child {
        max-width: 480px;
        width: 100%;
        text-align: center;
        margin: auto;
        padding: 48px 0;
    }

    .welcome-title {
        font-size: 56px;
        margin-bottom: 48px;
        line-height: 1.05;
    }

    .welcome-title span {
        font-size: 24px;
        font-weight: 600;
        letter-spacing: 1px;
        margin-bottom: 8px;
    }

    #welcome-view .btn {
        padding: 22px 32px;
        font-size: 17px;
        border-radius: 18px;
    }

    /* Book detail — side-by-side layout */
    #book-detail-view .detail-img-container {
        width: 260px;
        height: 340px;
        float: left;
        margin-right: 32px;
        margin-bottom: 16px;
    }

    /* Map wrapper */
    .library-map-wrapper {
        max-width: 680px;
        margin: 0 auto;
    }


    /* Footer — desktop layout */
    .app-footer {
        grid-column: 1 / -1;
        margin-top: 40px;
    }

    .footer-brand {
        padding: 56px 40px 40px;
        text-align: left;
    }

    .footer-brand .footer-tagline {
        max-width: 320px;
        margin-left: 0;
        margin-right: 0;
        margin-bottom: 28px;
    }

    .footer-socials {
        justify-content: flex-start;
    }

    .footer-grid {
        display: grid;
        grid-template-columns: 1.6fr 1fr 1.2fr;
        gap: 0;
        max-width: 1100px;
        margin: 0 auto;
    }

    .footer-links,
    .footer-contact {
        padding: 40px 40px;
    }

    .footer-links {
        border-right: 1px solid rgba(255, 255, 255, 0.06);
    }

    .footer-brand .footer-logo {
        font-size: 16px;
    }

    .footer-bottom {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
        text-align: left;
        padding: 20px 40px;
        max-width: 100%;
    }

    .footer-credits {
        text-align: right;
    }



    /* ── Admin-specific: login screen ── */
    .login-container {
        display: flex;
        align-items: center;
        justify-content: center;
        min-height: calc(100vh - 64px);
        padding: 40px !important;
    }

    .login-box {
        max-width: 420px;
        width: 100%;
        margin: 0 auto;
        padding: 56px !important;
        background: rgba(255, 255, 255, 0.9);
        backdrop-filter: blur(24px);
        -webkit-backdrop-filter: blur(24px);
        border: 1px solid rgba(255, 255, 255, 0.5);
        box-shadow: 0 32px 64px -16px rgba(8, 51, 68, 0.15),
            0 16px 32px -8px rgba(8, 51, 68, 0.1);
        border-radius: 32px;
    }

    /* Admin sidebar — 3 tabs */
    #admin-app .bottom-nav {
        justify-content: flex-start;
    }

    /* Admin content area */
    #admin-app #app-content {
        padding-top: 0 !important;
        padding-bottom: 40px;
    }

    #admin-app .view {
        max-width: 960px;
        margin: 0 auto;
        padding: 32px 40px;
    }

    /* Requests: two columns (pending | borrowed) */
    #requests-view.active-view {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 32px;
        align-items: start;
        max-width: 1100px !important;
        padding: 32px 40px !important;
    }

    #requests-view h2.view-title:nth-of-type(1) {
        grid-column: 1;
        margin-top: 0;
    }

    #requests-view #pending-list {
        grid-column: 1;
    }

    #requests-view h2.view-title:nth-of-type(2) {
        grid-column: 2;
        margin-top: 0;
    }

    #requests-view #borrowed-list {
        grid-column: 2;
    }

    #requests-view #borrows-pagination {
        grid-column: 2;
    }

    /* Sync progress spans both columns */
    #sync-progress-container {
        grid-column: 1 / -1;
    }

    /* Inventory book list — 2 col */
    #inventory-view .book-list {
        grid-template-columns: repeat(2, 1fr) !important;
    }

    /* Members list — 2 col */
    #members-view .book-list {
        grid-template-columns: repeat(2, 1fr) !important;
    }

    /* Category checkboxes in book form — 2 col */
    #category-checkboxes {
        grid-template-columns: 1fr 1fr !important;
    }

    /* Admin app layout: sidebar + main */
    #admin-app {
        grid-column: 1 / -1;
        grid-row: 2;
        display: grid !important;
        grid-template-columns: 240px 1fr;
        grid-template-areas: "sidebar content";
        height: 100%;
        width: 100%;
        overflow: hidden;
    }

    #admin-app .bottom-nav {
        grid-area: sidebar;
        height: 100%;
        overflow-y: auto;
    }

    #admin-app #app-content {
        grid-area: content;
        overflow-y: auto;
        height: 100%;
        padding-bottom: 40px !important;
    }

    /* Login container full-height centering */
    #admin-login-screen {
        display: flex;
        align-items: center;
        justify-content: center;
        min-height: calc(100vh - 64px);
        padding: 40px 24px;
        position: relative;
        z-index: 100;
    }

    /* ── Premium Scrollbars ── */
    *::-webkit-scrollbar {
        width: 8px;
        height: 8px;
    }

    *::-webkit-scrollbar-track {
        background: transparent;
    }

    *::-webkit-scrollbar-thumb {
        background: rgba(8, 51, 68, 0.1);
        border-radius: 20px;
        border: 2px solid transparent;
        background-clip: content-box;
    }

    *::-webkit-scrollbar-thumb:hover {
        background: rgba(8, 51, 68, 0.2);
        border-radius: 20px;
        border: 2px solid transparent;
        background-clip: content-box;
    }
}


/* ── Extra-wide screens ───────────────────────────── */
@media (min-width: 1280px) {

    body {
        grid-template-columns: 260px 1fr;
    }

    .bottom-nav {
        width: 260px;
    }

    .view {
        max-width: 1140px;
    }

    .book-list {
        grid-template-columns: repeat(3, 1fr) !important;
    }

    /* Welcome view buttons wider */
    #welcome-view>div {
        max-width: 560px;
    }
}


/* ── Hover effects (pointer devices only) ────────── */
@media (hover: hover) {

    .book-card:hover {
        transform: translateY(-4px);
        box-shadow: var(--shadow-lg);
        border-color: var(--primary-light);
    }

    .book-card:active {
        transform: scale(0.98);
    }

    .nav-item:hover {
        background: rgba(8, 51, 68, 0.04);
        color: var(--primary-color);
        transform: translateX(4px);
        border-color: rgba(8, 51, 68, 0.05);
    }

    .nav-item:active {
        transform: translateX(2px) scale(0.98);
    }

    .nav-item.active {
        background: linear-gradient(90deg, rgba(8, 51, 68, 0.08) 0%, rgba(8, 51, 68, 0.02) 100%);
        color: var(--primary-color);
        border-left: 4px solid var(--primary-color);
        border-top-left-radius: 4px;
        border-bottom-left-radius: 4px;
        padding-left: 12px;
    }

    .genre-card:hover {
        transform: translateY(-6px) scale(1.02);
        box-shadow: var(--shadow-lg);
        border-color: var(--primary-light);
    }

    .btn-primary:hover {
        transform: translateY(-2px);
        box-shadow: 0 8px 20px rgba(8, 51, 68, 0.3);
    }

    .map-shelf:hover {
        transform: scale(1.04);
        box-shadow: var(--shadow-md);
    }

    .filter-chip:hover {
        background: rgba(8, 51, 68, 0.05);
        border-color: var(--primary-light);
        color: var(--primary-color);
    }

    .header-action:hover {
        background: rgba(8, 51, 68, 0.06);
        transform: scale(1.05);
    }
}