:root {
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent-color: #38bdf8;
    --accent-hover: #0ea5e9;
    --border-color: #334155;
    --sidebar-bg: #0f172a;
    --sidebar-width: 260px;
    --danger: #ef4444;
    --success: #22c55e;
    --font-main: 'Outfit', sans-serif;
    --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.3);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.5), 0 2px 4px -2px rgb(0 0 0 / 0.5);
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: var(--font-main);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    /* Restoring flex layout for sidebar */
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background: var(--sidebar-bg);
    border-right: 1px solid var(--border-color);
    height: 100vh;
    position: sticky;
    top: 0;
    display: flex;
    flex-direction: column;
    padding: 1.5rem;
    flex-shrink: 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    color: var(--accent-color);
    margin-bottom: 2.5rem;
    padding-left: 0.5rem;
}

.logo h1 {
    font-weight: 400;
    color: var(--text-primary);
    font-size: 1.25rem;
}

.logo h1 strong {
    font-weight: 700;
    color: var(--accent-color);
}

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

.nav-item {
    display: block;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: 8px;
    transition: var(--transition);
    font-weight: 500;
}

.nav-link:hover,
.nav-link.active {
    background: rgba(56, 189, 248, 0.1);
    /* Transparent blue for dark mode */
    color: var(--accent-color);
}

.nav-link i {
    width: 20px;
    text-align: center;
}

/* Main Content */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    height: 100vh;
    overflow-y: auto;
}

/* Header (moved inside main content or simplified) */
.main-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 2rem;
    background: rgba(15, 23, 42, 0.85);
    /* Semi-transparent */
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

.main-footer {
    padding: 1.5rem 2rem;
    color: var(--text-secondary);
    border-top: 1px solid var(--border-color);
    margin-top: auto;
    font-size: 0.9rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--bg-color);
    /* Ensure opaque if needed, or transparent */
}

.header-title h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

.header-controls {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.user-dropdown {
    position: relative;
}

.user-menu-btn {
    border: none;
    background: transparent;
    color: var(--text-primary);
    padding: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.8rem;
    cursor: pointer;
    font-size: 1rem;
    transition: var(--transition);
    border-radius: 8px;
}

.user-menu-btn:hover {
    background: rgba(255, 255, 255, 0.05);
}

.user-menu-btn #header-username {
    font-weight: 500;
}

.avatar {
    width: 32px;
    height: 32px;
    background: var(--accent-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #0f172a;
}


/* Buttons */
.btn {
    padding: 0.6rem 1.2rem;
    border-radius: 8px;
    border: none;
    font-family: inherit;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
}

.btn-primary {
    background: var(--accent-color);
    color: #0f172a;
    /* Dark text on bright accent */
}

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(56, 189, 248, 0.25);
}

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

.btn-secondary:hover {
    background: var(--card-bg);
    color: var(--text-primary);
    border-color: var(--text-secondary);
    background: var(--card-bg);
    padding: 1rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

.search-filter {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.input-icon {
    position: relative;
    max-width: 300px;
    width: 100%;
}

.input-icon i {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
}

input[type="text"],
input[type="url"],
select {
    width: 100%;
    padding: 0.6rem 1rem 0.6rem 2.5rem;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-family: inherit;
    outline: none;
    transition: var(--transition);
}

select {
    padding-left: 2.5rem;
    cursor: pointer;
}

input:focus,
select:focus {
    border-color: var(--accent-color);
    background: var(--card-bg);
    box-shadow: 0 0 0 2px rgba(56, 189, 248, 0.1);
}

.category-filter-wrapper,
.sort-filter-wrapper {
    position: relative;
    min-width: 180px;
}

.category-filter-wrapper i,
.sort-filter-wrapper i {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
    z-index: 1;
}

/* Dashboard Layout */
.dashboard-container {
    padding: 1.5rem 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    max-width: 1600px;
    margin: 0 auto;
    width: 100%;
}

.controls-bar {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    gap: 1rem;
    flex-wrap: nowrap;
}

.search-filter {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex: 1;
}

.search-filter .input-icon {
    position: relative;
    flex: 1;
    min-width: 200px;
}


.view-toggles {
    display: flex;
    background: var(--bg-color);
    padding: 0.25rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    flex-shrink: 0;
    /* Prevent shrinking */
}

.view-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 0.5rem 0.8rem;
    border-radius: 6px;
    cursor: pointer;
    transition: var(--transition);
}

.view-btn.active {
    background: var(--accent-color);
    color: #0f172a;
    box-shadow: var(--shadow-sm);
}

/* Bookmarks Grid (Card View) */
.bookmarks-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

.bookmark-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-sm);
}

.bookmark-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent-color);
    box-shadow: var(--shadow-md);
}

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

.card-icon {
    width: 48px;
    height: 48px;
    background: #ffffff;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-right: 0.5rem;   
}

.action-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.4rem;
    border-radius: 6px;
    transition: var(--transition);
}

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

.action-btn.delete:hover {
    color: var(--danger);
    background: rgba(239, 68, 68, 0.1);
}

.card-title {
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
    color: var(--text-primary);
    text-decoration: none;
    display: block;
}

.card-title:hover {
    color: var(--accent-color);
}

.card-url {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 1.25rem;
    word-break: break-all;
}

.card-tags {
    margin-top: auto;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tag {
    background: rgba(148, 163, 184, 0.1);
    color: var(--text-secondary);
    font-size: 0.75rem;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    border: 1px solid rgba(148, 163, 184, 0.1);
    font-weight: 500;
}

/* List View Overrides */
.list-view {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.list-view .bookmark-card {
    flex-direction: row;
    align-items: center;
    padding: 1rem 1.5rem;
}

.list-view .card-header {
    margin-bottom: 0;
    margin-right: 1.5rem;
}

.list-view .card-content {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
}

.list-view .card-url {
    margin-bottom: 0;
    display: none;
}

@media (min-width: 1024px) {
    .list-view .card-url {
        display: block;
    }
}

.list-view .card-actions {
    opacity: 1;
    /* Always show in list view */
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(15, 23, 42, 0.7);
    /* Darker overlay */
    backdrop-filter: blur(4px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 1;
    visibility: visible;
    transition: var(--transition);
}

.modal.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.modal-content {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 2rem;
    width: 100%;
    max-width: 500px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    transform: translateY(0);
    transition: var(--transition);
}

.modal.hidden .modal-content {
    transform: translateY(20px);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.modal-header h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

.close-modal {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 1.25rem;
    cursor: pointer;
    transition: var(--transition);
}

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

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
}

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

.hidden {
    display: none !important;
}

/* Tag Input */
.tag-input-container {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 0.5rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    min-height: 48px;
    position: relative;
    align-items: center;
    transition: var(--transition);
}

.tag-input-container:focus-within {
    border-color: var(--accent-color);
    background: var(--card-bg);
    /* Use card-bg instead of white for dark mode contrast */
    box-shadow: 0 0 0 2px rgba(56, 189, 248, 0.1);
}

.tags-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tag-chip {
    background: rgba(56, 189, 248, 0.15);
    color: var(--accent-color);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.tag-chip .remove-tag {
    cursor: pointer;
    font-size: 1rem;
    line-height: 1;
    opacity: 0.7;
    transition: var(--transition);
}

.tag-chip .remove-tag:hover {
    opacity: 1;
    color: var(--danger);
}

#tag-input {
    border: none;
    outline: none;
    background: transparent;
    padding: 0.25rem;
    flex: 1;
    min-width: 120px;
    box-shadow: none;
    /* override default input focus shadow */
}

#tag-input:focus {
    box-shadow: none;
    background: transparent;
}

/* Suggestions Dropdown */
.suggestions-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    margin-top: 4px;
    max-height: 200px;
    overflow-y: auto;
    z-index: 1001;
    box-shadow: var(--shadow-md);
}

.suggestion-item {
    padding: 0.75rem 1rem;
    cursor: pointer;
    color: var(--text-primary);
    transition: var(--transition);
}

.suggestion-item:hover,
.suggestion-item.active {
    background: rgba(56, 189, 248, 0.1);
    color: var(--accent-color);
}


/* Drag & Drop Feedback */
.dragging-over {
    position: relative;
}

.dragging-over::after {
    content: 'Drop to add bookmark';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(56, 189, 248, 0.2);
    backdrop-filter: blur(4px);
    z-index: 2000;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 3rem;
    font-weight: 700;
    color: var(--accent-color);
    border: 4px dashed var(--accent-color);
    pointer-events: none;
}

/* Login Modal Overlay */
.login-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(15, 23, 42, 0.9);
    /* Dark semi-transparent background */
    backdrop-filter: blur(8px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 5000;
    opacity: 1;
    transition: opacity 0.3s ease;
}

.login-overlay.hidden {
    opacity: 0;
    pointer-events: none;
    display: none;
    /* remove from flow */
}

.login-box {
    background: var(--card-bg);
    padding: 3rem;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    width: 100%;
    max-width: 400px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    transform: translateY(0);
    transition: transform 0.3s ease;
}

.login-overlay.hidden .login-box {
    transform: translateY(20px);
}