:root {
    --bg-gradient-start: #0f172a;
    --bg-gradient-end: #1e293b;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --accent-color: #3b82f6;
    --accent-hover: #2563eb;
    --danger-color: #ef4444;
    --danger-hover: #dc2626;
    --card-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Inter', sans-serif;
    background: linear-gradient(135deg, var(--bg-gradient-start), var(--bg-gradient-end));
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
}

.app-container {
    width: 100%;
    margin: 0 auto;
    padding: 0;
}

/* Header & Toggle */
.header {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 2rem;
    padding: 1.5rem 1.5rem 1rem 1.5rem;
    border-bottom: 1px solid var(--glass-border);
    position: sticky;
    top: 0;
    z-index: 50;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

main {
    padding: 0 1rem 1rem 1rem;
}

.header-title-wrapper {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.app-logo {
    height: 48px;
    width: auto;
    object-fit: contain;
    border-radius: 8px;
}

.header h1 {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.5px;
    background: linear-gradient(to right, #60a5fa, #a78bfa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
    width: 100%;
}

.layout-select {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    padding: 0.5rem 1rem;
    border-radius: 8px;
    font-family: inherit;
    font-size: 0.9rem;
    cursor: pointer;
    outline: none;
}

.layout-select option {
    background: var(--bg-gradient-end);
    color: var(--text-primary);
}

.divider {
    width: 1px;
    height: 24px;
    background: var(--glass-border);
    margin: 0 0.5rem;
}

/* Edit Mode */
body.edit-mode #editModeBtn i {
    color: var(--danger-color);
}

/* Categories */
.category {
    margin-bottom: 1.5rem;
}

.category-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.category-title {
    font-size: 1.5rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.category-actions,
.tile-actions {
    display: none;
    /* hidden by default, shown in edit mode */
    gap: 0.5rem;
}

body.edit-mode .category-actions,
body.edit-mode .tile-actions,
body.edit-mode .add-tile-btn,
body.edit-mode .add-category-btn-container {
    display: flex;
}

.btn-icon {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: var(--text-secondary);
    border-radius: 6px;
    padding: 0.5rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-icon:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.1);
}

.btn-icon.danger:hover {
    color: var(--text-primary);
    background: var(--danger-color);
    border-color: var(--danger-hover);
}

/* Grid & Tiles (Mobile First) */
.tiles-grid {
    display: grid;
    gap: 1rem;
    grid-template-columns: minmax(0, 1fr);
}

.tile {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 1rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    text-decoration: none;
    color: var(--text-primary);
    position: relative;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: var(--card-shadow);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), background 0.3s ease, border-color 0.3s ease;
    z-index: 2;
    min-height: 80px;
}

.tile:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.2);
    z-index: 10;
}

.tile-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.1);
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.5rem;
    flex-shrink: 0;
    overflow: hidden;
}

.tile-icon img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.tile-info {
    flex-grow: 1;
    overflow: hidden;
}

.tile-title {
    font-size: 1.1rem;
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.tile-url {
    font-size: 0.85rem;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-top: 0.25rem;
}

.tile-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-top: 0.25rem;
}

.tile-actions {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    flex-direction: row;
}

/* Layout List Minimal Styling */
body.layout-list .category {
    margin-bottom: 1rem;
}

body.layout-list .category-header {
    margin-bottom: 0.5rem;
}

body.layout-list .tiles-grid {
    gap: 0.5rem;
}

body.layout-list .tile {
    padding: 0.5rem 0.75rem;
    min-height: fit-content;
    height: fit-content;
    border-radius: 6px;
    gap: 0.75rem;
}

body.layout-list .tile-icon {
    width: 24px;
    height: 24px;
    border-radius: 4px;
    font-size: 0.9rem;
}

body.layout-list .tile-title {
    font-size: 0.95rem;
    font-weight: 700;
}

body.layout-list .tile-desc,
body.layout-list .tile-url {
    display: block;
    font-size: 0.8rem;
    font-weight: 300;
    margin-top: 0;
}

body.layout-list .tile-actions {
    top: 50%;
    transform: translateY(-50%);
}

/* Edit Mode styling overrides */
body.edit-mode .tile,
body.edit-mode .category {
    cursor: grab;
}

body.edit-mode .tile:active,
body.edit-mode .category:active {
    cursor: grabbing;
}

.sortable-ghost {
    opacity: 0.4;
    background: var(--glass-bg);
    border: 2px dashed var(--accent-color) !important;
}

.sortable-chosen {
    transform: scale(0.98);
}

.sortable-drag {
    opacity: 1 !important;
    transform: scale(1.05);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
    z-index: 1000;
}

/* Add Buttons */
.add-tile-btn {
    border: 2px dashed var(--glass-border);
    background: transparent;
    display: none;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    gap: 0.5rem;
    color: var(--text-secondary);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    z-index: 1;
}

.add-tile-btn:hover {
    border-color: var(--accent-color);
    color: var(--accent-color);
    transform: none;
    background: rgba(59, 130, 246, 0.05);
}

.add-category-btn-container {
    display: none;
    justify-content: center;
    margin-top: 2rem;
}

.add-category-btn {
    background: var(--glass-bg);
    border: 1px dashed var(--glass-border);
    color: var(--text-primary);
    padding: 1rem 2rem;
    border-radius: 12px;
    font-size: 1.1rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.add-category-btn:hover {
    border-color: var(--accent-color);
    background: rgba(59, 130, 246, 0.1);
}

/* Modals */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(5px);
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
    z-index: 1000;
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.modal {
    background: var(--bg-gradient-start);
    border: 1px solid var(--glass-border);
    padding: 2rem;
    border-radius: 16px;
    width: 100%;
    max-width: 400px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    transform: translateY(20px);
    transition: transform 0.3s ease;
}

.modal-overlay.active .modal {
    transform: translateY(0);
}

.modal h2 {
    margin-bottom: 1.5rem;
    font-size: 1.25rem;
}

.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.form-group input {
    width: 100%;
    padding: 0.75rem 1rem;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    color: var(--text-primary);
    font-family: inherit;
    transition: border-color 0.2s;
}

.form-group input:focus {
    outline: none;
    border-color: var(--accent-color);
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
    margin-top: 2rem;
}

.btn {
    padding: 0.6rem 1.2rem;
    border: none;
    border-radius: 8px;
    font-weight: 500;
    cursor: pointer;
    font-family: inherit;
    transition: background 0.2s;
}

.btn-secondary {
    background: var(--glass-bg);
    color: var(--text-primary);
    border: 1px solid var(--glass-border);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
}

.btn-primary {
    background: var(--accent-color);
    color: white;
}

.btn-primary:hover {
    background: var(--accent-hover);
}

/* Progressive Enhancement */
/* Tablet and Up */
@media (min-width: 600px) {
    body {}

    .header {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
        margin-bottom: 1.5rem;
    }

    .header h1 {
        font-size: 2rem;
    }

    .header-right {
        width: auto;
        gap: 1rem;
    }

    .tiles-grid {
        gap: 1.5rem;
    }

    .tile {
        padding: 1.5rem;
        height: 96px;
    }

    body.layout-grid-3 .tiles-grid,
    body.layout-grid-4 .tiles-grid,
    body.layout-grid-8 .tiles-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

/* Small Desktop */
@media (min-width: 900px) {
    body.layout-grid-3 .tiles-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    body.layout-grid-4 .tiles-grid {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }

    body.layout-grid-8 .tiles-grid {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }
}

/* Large Desktop */
@media (min-width: 1200px) {
    body.layout-grid-8 .tiles-grid {
        grid-template-columns: repeat(8, minmax(0, 1fr));
    }

    body.layout-grid-8 .tile {
        height: 120px;
        flex-direction: column;
        justify-content: center;
        text-align: center;
        padding: 1rem 0.5rem;
        gap: 0.5rem;
    }

    body.layout-grid-8 .tile-icon {
        width: 40px;
        height: 40px;
    }

    body.layout-grid-8 .tile-title {
        font-size: 0.9rem;
        white-space: normal;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }

    body.layout-grid-8 .tile-url {
        display: none;
    }

    body.layout-grid-8 .tile-actions {
        flex-direction: row;
        top: 5px;
        right: 50%;
        transform: translateX(50%);
    }
}

/* Light Mode Overrides */
body.light-mode {
    --bg-gradient-start: #f8fafc;
    --bg-gradient-end: #e2e8f0;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(0, 0, 0, 0.1);
    --card-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

body.light-mode .header h1 {
    background: linear-gradient(to right, #2563eb, #7c3aed);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

body.light-mode .layout-select {
    background: #ffffff;
    border: 1px solid rgba(0, 0, 0, 0.15);
    color: var(--text-primary);
}

body.light-mode .layout-select option {
    background: #ffffff;
    color: var(--text-primary);
}

body.light-mode .modal {
    background: #ffffff;
}

body.light-mode .form-group input {
    background: #ffffff;
    border: 1px solid rgba(0, 0, 0, 0.15);
}

body.light-mode .tile-icon {
    background: rgba(0, 0, 0, 0.04);
}

body.light-mode .tile:hover {
    background: rgba(255, 255, 255, 0.9);
    border-color: rgba(0, 0, 0, 0.2);
}

body.light-mode .btn-icon {
    background: #ffffff;
}

body.light-mode .btn-icon:hover {
    background: rgba(0, 0, 0, 0.05);
}

body.light-mode .btn-icon.danger:hover {
    background: var(--danger-color);
    color: white;
}

body.light-mode .btn-secondary {
    background: #ffffff;
    border-color: rgba(0, 0, 0, 0.15);
}

body.light-mode .btn-secondary:hover {
    background: rgba(0, 0, 0, 0.05);
}

body.light-mode .add-tile-btn:hover {
    background: rgba(59, 130, 246, 0.08);
}

/* App Layout */
.app-layout {
    display: flex;
    min-height: 100vh;
    overflow: hidden;
}

.sidebar {
    width: 260px;
    background: var(--glass-bg);
    border-right: 1px solid var(--glass-border);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    display: flex;
    flex-direction: column;
    padding: 1.5rem 1rem;
    flex-shrink: 0;
    z-index: 100;
    transition: transform 0.3s ease;
}

.sidebar-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0 0.5rem 2rem 0.5rem;
}

.sidebar-logo {
    height: 32px;
    width: auto;
}

.sidebar-header h2 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
}

.nav-menu {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    border-radius: 8px;
    color: var(--text-secondary);
    cursor: pointer;
    font-weight: 500;
    transition: all 0.2s ease;
}

.nav-item i {
    width: 20px;
    text-align: center;
    font-size: 1.1rem;
}

.nav-item:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
}

.nav-item.active {
    background: rgba(59, 130, 246, 0.1);
    color: var(--accent-color);
}

.main-wrapper {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    position: relative;
    height: 100vh;
}

.sidebar-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(3px);
    z-index: 90;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.sidebar-overlay.active {
    opacity: 1;
}

/* Hide header logo inside main wrapper if sidebar is visible */
.app-logo {
    display: none;
}

@media (max-width: 768px) {
    .app-layout {
        flex-direction: column;
    }

    .sidebar {
        position: fixed;
        top: 0;
        bottom: 0;
        left: 0;
        transform: translateX(-100%);
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .sidebar-overlay.active {
        display: block;
    }

    .mobile-only {
        display: flex !important;
    }

    /* Show logo in header if on mobile and sidebar hidden */
    .app-logo {
        display: block;
    }
}

body.hide-page1-controls #layoutSelect,
body.hide-page1-controls #editModeBtn,
body.hide-page1-controls .header-right .divider:last-of-type,
body.hide-page1-controls .header-right .divider:first-of-type {
    display: none !important;
}

#nav-component,
#header-component {
    display: contents;
}