@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&family=Playfair+Display:ital,wght@0,400..900;1,400..900&display=swap');

/* Global Design System Variables */
:root {
    --color-dark-bg: #0b0f19;
    --color-card-bg: rgba(255, 255, 255, 0.03);
    --color-text-light: #ffffff;
    --color-primary-cyan: #00f2fe;
    --color-secondary-orange: #ff512f;
    --color-dark-text: #94a3b8;
    --font-main: 'Plus Jakarta Sans', sans-serif;

    /* Advanced Layout Tokens */
    --glass-bg: rgba(11, 15, 25, 0.7);
    --glass-border: rgba(255, 255, 255, 0.06);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
    --card-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.light-theme {
    --color-dark-bg: #f8fafc;
    --color-card-bg: #ffffff;
    --color-text-light: #0f172a;
    --color-primary-cyan: #0ea5e9;
    --color-secondary-orange: #f97316;
    --color-dark-text: #475569;

    --glass-bg: rgba(255, 255, 255, 0.85);
    --glass-border: rgba(15, 23, 42, 0.08);
    --glass-shadow: 0 8px 32px 0 rgba(15, 23, 42, 0.05);
    --card-shadow: 0 10px 30px rgba(15, 23, 42, 0.05);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

html {
    overflow-y: scroll;
}

html, body {
    min-height: 100vh;
}

body {
    background-color: var(--color-dark-bg);
    color: var(--color-text-light);
    font-family: var(--font-main);
    overflow-x: hidden;
    display: flex;
    flex-direction: column;
}

/* Header & Navigation */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px !important;
    padding: 0 5% !important;
    box-sizing: border-box !important;
    background-color: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--glass-border);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--glass-shadow);
}

.logo {
    font-size: 24px !important;
    font-weight: 800 !important;
    font-family: var(--font-main) !important;
    color: var(--color-text-light);
    text-decoration: none;
    letter-spacing: 0.5px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.logo span {
    background: linear-gradient(135deg, var(--color-primary-cyan), var(--color-secondary-orange));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-links {
    display: flex;
    align-items: center;
}

.nav-links a {
    color: var(--color-dark-text);
    text-decoration: none;
    margin-left: 25px;
    font-size: 15px !important;
    font-weight: 600 !important;
    font-family: var(--font-main) !important;
    padding: 6px 0;
    transition: var(--transition-smooth);
    border-bottom: 2px solid transparent;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--color-primary-cyan);
    border-bottom: 2px solid var(--color-primary-cyan);
}

.theme-toggle {
    cursor: pointer;
    font-size: 20px;
    margin-left: 30px;
    user-select: none;
    transition: transform 0.2s ease;
}

.theme-toggle:hover {
    transform: scale(1.15);
}

/* Footer */
footer {
    background-color: var(--glass-bg);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border-top: 1px solid var(--glass-border);
    padding: 25px 5%;
    text-align: center;
    font-size: 14px;
    color: var(--color-dark-text);
    margin-top: auto;
}

.hero-section {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    min-height: auto;
    padding: 30px 10% 25px 10%;
    text-align: center;
    position: relative;
    overflow: hidden;
    background: radial-gradient(circle at top right, rgba(0, 242, 254, 0.05), transparent 60%),
                radial-gradient(circle at bottom left, rgba(255, 81, 47, 0.05), transparent 60%);
}

.main-headline {
    font-size: 32px;
    line-height: 1.3;
    margin-bottom: 12px;
    font-weight: 800;
    letter-spacing: -0.5px;
}

.main-headline span {
    background: linear-gradient(135deg, var(--color-primary-cyan), var(--color-secondary-orange));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.sub-headline {
    font-size: 14px;
    color: var(--color-dark-text);
    margin-bottom: 25px;
    max-width: 700px;
    line-height: 1.5;
}

.cta-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

/* Buttons */
.action-btn {
    padding: 12px 24px;
    border: none;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 700;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: var(--transition-smooth);
    text-decoration: none;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
}

.action-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.25);
    border-bottom: none !important;
}

.action-btn.cyan {
    background: linear-gradient(135deg, var(--color-primary-cyan) 0%, #00b8c4 100%);
    color: #0b0f19 !important;
}

.action-btn.orange {
    background: linear-gradient(135deg, var(--color-secondary-orange) 0%, #e03e1d 100%);
    color: #ffffff !important;
}

.action-btn.purple {
    background: linear-gradient(135deg, #6c63ff 0%, #574bfc 100%);
    color: #ffffff;
}

.action-btn.green {
    background: linear-gradient(135deg, #2ecc71 0%, #27ae60 100%);
    color: #ffffff;
}

.action-btn.grey {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid var(--glass-border);
    color: var(--color-text-light);
}

.action-btn.grey:hover {
    background: rgba(255, 255, 255, 0.15);
}

.light-theme .action-btn.grey {
    background: rgba(15, 23, 42, 0.05);
    border-color: rgba(15, 23, 42, 0.1);
    color: var(--color-text-light);
}

.light-theme .action-btn.grey:hover {
    background: rgba(15, 23, 42, 0.15);
}

.action-btn.red {
    background: linear-gradient(135deg, #e74c3c 0%, #c0392b 100%);
    color: white;
}

/* Feature Grid Cards */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
    padding: 40px 10%;
    margin-bottom: 50px;
}

.feature-card {
    background: var(--color-card-bg);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 30px;
    text-align: center;
    box-shadow: var(--card-shadow);
    transition: var(--transition-smooth);
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: var(--color-primary-cyan);
    box-shadow: 0 12px 30px rgba(0, 242, 254, 0.1);
}

.feature-icon {
    font-size: 40px;
    margin-bottom: 20px;
    color: var(--color-primary-cyan);
}

/* Card / Forms Overlay Layout */
.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 60px 20px;
    flex: 1;
}

.login-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: 40px;
    width: 100%;
    max-width: 480px;
    box-shadow: var(--glass-shadow);
}

.login-card-title {
    font-size: 26px;
    font-weight: 800;
    margin-bottom: 25px;
    text-align: center;
    background: linear-gradient(135deg, var(--color-primary-cyan), var(--color-secondary-orange));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.form-group {
    margin-bottom: 20px;
}

.form-row {
    display: flex;
    gap: 20px;
    margin-bottom: 10px;
}

.form-row .form-group {
    flex: 1;
    margin-bottom: 0;
}

.form-label {
    display: block;
    margin-bottom: 8px;
    font-size: 14px;
    font-weight: 600;
    color: var(--color-text-light);
}

.form-input, .form-select, .form-textarea {
    width: 100%;
    padding: 12px 16px;
    background: rgba(0, 0, 0, 0.25);
    border: 1px solid var(--glass-border);
    border-radius: 10px;
    color: var(--color-text-light);
    outline: none;
    font-family: var(--font-main);
    font-size: 14px;
    transition: var(--transition-smooth);
}

.light-theme .form-input, 
.light-theme .form-select, 
.light-theme .form-textarea {
    background: #ffffff;
    border-color: rgba(15, 23, 42, 0.15);
}

.form-input[type="file"] {
    padding: 8px 12px;
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
    border-color: var(--color-primary-cyan);
    box-shadow: 0 0 8px rgba(0, 242, 254, 0.25);
}

.form-textarea {
    min-height: 120px;
    resize: vertical;
}

/* User & Admin Layouts */
.admin-layout {
    display: grid;
    grid-template-columns: 280px 1fr;
    min-height: calc(100vh - 80px);
}

@media (max-width: 992px) {
    .admin-layout {
        grid-template-columns: 1fr;
    }
    .admin-sidebar {
        height: auto !important;
        position: relative !important;
        border-right: none !important;
        border-bottom: 1px solid var(--glass-border);
    }
}

.admin-sidebar {
    background: var(--glass-bg);
    border-right: 1px solid var(--glass-border);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    padding: 30px 20px;
    display: flex;
    flex-direction: column;
    position: sticky;
    top: 80px;
    height: calc(100vh - 80px);
    box-sizing: border-box;
}

.admin-menu-list {
    list-style: none;
    padding: 0;
    margin: 0;
    flex: 1;
    overflow-y: auto;
}

.admin-menu-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    color: var(--color-dark-text);
    text-decoration: none;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-smooth);
    border-left: 3px solid transparent;
    margin-bottom: 8px;
}

.admin-menu-link i {
    width: 20px;
    text-align: center;
    font-size: 16px;
}

.admin-menu-link:hover,
.admin-menu-link.active {
    background: rgba(255, 255, 255, 0.04);
    color: var(--color-text-light);
    border-left-color: var(--color-primary-cyan);
}

.admin-main {
    padding: 40px;
    box-sizing: border-box;
}

/* Stat Cards */
.admin-stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
    margin-bottom: 25px;
}

.admin-stat-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--card-shadow);
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

.admin-stat-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--color-primary-cyan);
}

.admin-stat-card.orange::after {
    background: var(--color-secondary-orange);
}

.admin-stat-card.purple::after {
    background: #6c63ff;
}

.admin-stat-card.green::after {
    background: #2ecc71;
}

.admin-stat-card:hover {
    transform: translateY(-4px);
}

.admin-stat-num {
    font-size: 28px;
    font-weight: 800;
    margin-bottom: 4px;
}

.admin-stat-lbl {
    font-size: 12px;
    font-weight: 700;
    color: var(--color-dark-text);
    text-transform: uppercase;
}

.admin-stat-icon {
    font-size: 32px;
    opacity: 0.25;
}

/* Panel Box */
.admin-box {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 30px;
    box-shadow: var(--glass-shadow);
    margin-bottom: 25px;
}

.admin-box-title {
    font-size: 18px;
    font-weight: 800;
    color: var(--color-primary-cyan);
    border-bottom: 1px solid var(--glass-border);
    padding-bottom: 15px;
    margin-bottom: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Table */
.table-responsive {
    width: 100%;
    overflow-x: auto;
    border-radius: 12px;
    border: 1px solid var(--glass-border);
}

.admin-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

.admin-table th, .admin-table td {
    padding: 16px 20px;
    border-bottom: 1px solid var(--glass-border);
    text-align: left;
    vertical-align: middle;
}

.admin-table th {
    font-weight: 700;
    color: var(--color-primary-cyan);
    background: rgba(255, 255, 255, 0.01);
    text-transform: uppercase;
    font-size: 12px;
    letter-spacing: 0.5px;
}

.admin-table tr:hover {
    background: rgba(255, 255, 255, 0.015);
}

/* Section visibility */
.admin-section {
    display: none;
    animation: fadeIn 0.4s ease forwards;
}

.admin-section.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(15px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Badges */
.badge {
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 700;
    display: inline-block;
}

.badge.green {
    background: rgba(46, 204, 113, 0.15);
    color: #2ecc71;
    border: 1px solid rgba(46, 204, 113, 0.25);
}

.badge.red {
    background: rgba(231, 76, 60, 0.15);
    color: #e74c3c;
    border: 1px solid rgba(231, 76, 60, 0.25);
}

.badge.cyan {
    background: rgba(0, 242, 254, 0.1);
    color: var(--color-primary-cyan);
    border: 1px solid rgba(0, 242, 254, 0.2);
}

.badge.orange {
    background: rgba(255, 81, 47, 0.1);
    color: var(--color-secondary-orange);
    border: 1px solid rgba(255, 81, 47, 0.2);
}

/* Modals */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal-card {
    background: var(--glass-bg);
    border: 1.5px solid var(--glass-border);
    border-radius: 20px;
    width: 100%;
    max-width: 600px;
    padding: 30px;
    box-shadow: var(--glass-shadow);
    position: relative;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.modal-close {
    font-size: 28px;
    font-weight: 800;
    color: var(--color-dark-text);
    background: none;
    border: none;
    cursor: pointer;
}

.modal-close:hover {
    color: var(--color-text-light);
}

/* Interactive Category Tree Layout */
.category-tree-container ul {
    list-style: none;
    padding-left: 20px;
}

.category-tree-container > ul {
    padding-left: 0;
}

.tree-node {
    margin: 8px 0;
}

.tree-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 18px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    transition: var(--transition-smooth);
    user-select: none;
}

.tree-content:hover {
    background: rgba(255, 255, 255, 0.04);
    border-color: rgba(255, 255, 255, 0.15);
}

.tree-content.active-node {
    background: rgba(0, 242, 254, 0.06) !important;
    border-color: var(--color-primary-cyan) !important;
    box-shadow: 0 0 10px rgba(0, 242, 254, 0.15);
}

.btn-group {
    display: flex;
    gap: 8px;
}

/* Drag over highlights */
.drag-over-before {
    border-top: 2px solid var(--color-primary-cyan) !important;
}

.drag-over-after {
    border-bottom: 2px solid var(--color-primary-cyan) !important;
}

.drag-over-inside {
    background: rgba(0, 242, 254, 0.15) !important;
    border: 1px dashed var(--color-primary-cyan) !important;
}

/* How to Article Cards */
.howto-card {
    position: relative;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 25px 20px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: var(--transition-smooth);
}

.howto-card:hover {
    transform: translateY(-4px);
    border-color: var(--color-primary-cyan);
}

/* Pagination */
.pagination-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 25px;
    flex-wrap: wrap;
    gap: 15px;
}

.pagination {
    display: flex;
    gap: 5px;
}

.page-btn {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--glass-border);
    color: var(--color-dark-text);
    padding: 6px 12px;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition-smooth);
}

.page-btn:hover, .page-btn.active {
    background: var(--color-primary-cyan);
    color: #0b0f19;
    border-color: var(--color-primary-cyan);
}

.page-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

/* Writing Studio Layouts */
.studio-layout {
    display: grid;
    grid-template-columns: 320px 1fr;
    height: calc(100vh - 80px);
}

.studio-sidebar {
    background: var(--glass-bg);
    border-right: 1px solid var(--glass-border);
    padding: 20px;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
}

.studio-main {
    padding: 30px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

/* ==========================================================================
   Weble 3D Book Cards styling 
   ========================================================================== */
.weble-book-card {
    background: #05070e !important;
    border: 1px solid rgba(255, 255, 255, 0.05) !important;
    border-radius: 12px !important;
    padding: 0 !important;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    cursor: pointer;
    text-decoration: none !important;
    color: inherit !important;
    transition: var(--transition-smooth) !important;
    width: 130px !important;
    margin: 0 auto;
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.5);
}

.weble-book-card:hover {
    transform: translateY(-5px) !important;
    border-color: var(--color-primary-cyan) !important;
    box-shadow: 0 10px 20px rgba(0, 242, 254, 0.15), 
                0 12px 25px rgba(0, 0, 0, 0.6) !important;
}

/* Realistic 3D Book Cover Container */
.weble-cover-container {
    width: 100%;
    height: 195px;
    position: relative;
    border-radius: 12px 12px 0 0;
    overflow: hidden;
    background: linear-gradient(135deg, #1e293b, #0f172a);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-smooth);
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
}

/* Realistic Book Spine/Binding shadow on the left */
.weble-book-spine {
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 8px;
    background: linear-gradient(to right, 
        rgba(0, 0, 0, 0.6) 0%, 
        rgba(0, 0, 0, 0.3) 20%, 
        rgba(255, 255, 255, 0.08) 25%, 
        rgba(255, 255, 255, 0.0) 35%, 
        rgba(0, 0, 0, 0.0) 80%, 
        rgba(0, 0, 0, 0.25) 100%
    );
    z-index: 10;
    pointer-events: none;
}

/* Page edges mockup on the right side of the book cover */
.weble-book-pages-edge {
    position: absolute;
    right: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, #cbd5e1 50%, #94a3b8 50%);
    background-size: 100% 4px;
    opacity: 0.12;
    z-index: 9;
}

/* Book Cover Image */
.weble-cover-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 12px 12px 0 0;
    transition: var(--transition-smooth);
}

.weble-book-card:hover .weble-cover-img {
    filter: brightness(1.05);
}

/* Procedural generated cover design */
.weble-procedural-cover {
    width: 100%;
    height: 100%;
    padding: 12px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-items: center;
    text-align: center;
    border-radius: 12px 12px 0 0;
    box-sizing: border-box;
    position: relative;
    border-left: 1.5px solid rgba(255, 255, 255, 0.1);
}

.weble-procedural-title {
    font-family: 'Playfair Display', 'Georgia', serif;
    font-size: 11px;
    font-weight: 700;
    color: #ffffff;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    line-height: 1.3;
    margin-top: 15px;
    display: -webkit-box;
    -webkit-line-clamp: 4;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.8);
}

.weble-procedural-author {
    font-size: 8px;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.85);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 10px;
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.8);
}

/* Book Card Text & Info Details */
.weble-details {
    padding: 10px 8px 12px 8px;
    width: 100%;
    background: #000000;
    border-radius: 0 0 12px 12px;
    box-sizing: border-box;
}

.weble-title {
    font-size: 11px;
    font-weight: 800;
    color: #ffffff;
    margin-bottom: 3px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    text-align: center;
}

.weble-author {
    font-size: 10px;
    font-weight: 500;
    color: #94a3b8;
    text-align: center;
    transition: var(--transition-smooth);
}

.weble-book-card:hover .weble-author {
    color: var(--color-primary-cyan);
}


/* Shift footer and adjust spacing/stacking context on dashboard pages to prevent overlapping */
.admin-layout ~ footer {
    margin-top: 0 !important;
    position: relative;
    z-index: 10;
}