/* ============================================
   BasicList — Modern Apple Glass Todo App
   ============================================ */

/* === CSS Variables === */
:root {
    --color-primary: #6C5CE7;
    --color-primary-rgb: 108, 92, 231;
    --color-primary-light: #A29BFE;
    --color-success: #00B894;
    --color-success-rgb: 0, 184, 148;
    --color-warning: #FDCB6E;
    --color-warning-rgb: 253, 203, 110;
    --color-danger: #D63031;
    --color-danger-rgb: 214, 48, 49;
    --color-accent: #E84393;
    --color-accent-rgb: 232, 67, 147;
    --color-info: #0984E3;
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.12);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.16);
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --sidebar-width: 280px;
}

/* Dark Theme */
[data-theme="dark"] {
    --bg-primary: #0a0a1a;
    --bg-secondary: #12122a;
    --bg-tertiary: #1a1a3e;
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    --glass-subtle-bg: rgba(255, 255, 255, 0.08);
    --text-primary: #FFFFFF;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --text-tertiary: rgba(255, 255, 255, 0.4);
    --text-inverse: #0a0a1a;
    --border-color: rgba(255, 255, 255, 0.08);
    --hover-bg: rgba(255, 255, 255, 0.08);
    --input-bg: rgba(255, 255, 255, 0.06);
    --orb-1: rgba(108, 92, 231, 0.3);
    --orb-2: rgba(0, 184, 148, 0.2);
    --orb-3: rgba(232, 67, 147, 0.2);
    --orb-4: rgba(9, 132, 227, 0.2);
    --scrollbar-bg: rgba(255,255,255,0.05);
    --scrollbar-thumb: rgba(255,255,255,0.15);
}

/* Light Theme */
[data-theme="light"] {
    --bg-primary: #F0F2F5;
    --bg-secondary: #FFFFFF;
    --bg-tertiary: #E8EAF0;
    --glass-bg: rgba(255, 255, 255, 0.6);
    --glass-border: rgba(255, 255, 255, 0.8);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
    --glass-subtle-bg: rgba(0, 0, 0, 0.04);
    --text-primary: #1a1a2e;
    --text-secondary: rgba(26, 26, 46, 0.65);
    --text-tertiary: rgba(26, 26, 46, 0.4);
    --text-inverse: #FFFFFF;
    --border-color: rgba(0, 0, 0, 0.06);
    --hover-bg: rgba(0, 0, 0, 0.04);
    --input-bg: rgba(0, 0, 0, 0.03);
    --orb-1: rgba(108, 92, 231, 0.15);
    --orb-2: rgba(0, 184, 148, 0.1);
    --orb-3: rgba(232, 67, 147, 0.1);
    --orb-4: rgba(9, 132, 227, 0.1);
    --scrollbar-bg: rgba(0,0,0,0.03);
    --scrollbar-thumb: rgba(0,0,0,0.12);
}

/* === Reset & Base === */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    overflow: hidden;
    transition: background var(--transition), color var(--transition);
}

/* Scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--scrollbar-bg); border-radius: 3px; }
::-webkit-scrollbar-thumb { background: var(--scrollbar-thumb); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-tertiary); }

/* === Animated Background === */
.bg-gradient {
    position: fixed;
    inset: 0;
    background: var(--bg-primary);
    z-index: -2;
    transition: background var(--transition);
}

.bg-orbs {
    position: fixed;
    inset: 0;
    z-index: -1;
    overflow: hidden;
    pointer-events: none;
}

.orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    animation: float 20s ease-in-out infinite;
}

.orb-1 {
    width: 400px; height: 400px;
    background: var(--orb-1);
    top: -100px; left: -100px;
    animation-delay: 0s;
}

.orb-2 {
    width: 350px; height: 350px;
    background: var(--orb-2);
    top: 50%; right: -80px;
    animation-delay: -5s;
    animation-duration: 25s;
}

.orb-3 {
    width: 300px; height: 300px;
    background: var(--orb-3);
    bottom: -80px; left: 30%;
    animation-delay: -10s;
    animation-duration: 22s;
}

.orb-4 {
    width: 250px; height: 250px;
    background: var(--orb-4);
    top: 30%; left: 50%;
    animation-delay: -15s;
    animation-duration: 28s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    25% { transform: translate(50px, -50px) scale(1.05); }
    50% { transform: translate(-30px, 60px) scale(0.95); }
    75% { transform: translate(40px, 30px) scale(1.02); }
}

/* === Glass Effect === */
.glass {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
}

.glass-subtle {
    background: var(--glass-subtle-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
}

/* === App Layout === */
.app-container {
    display: flex;
    height: 100vh;
    position: relative;
}

/* === Sidebar === */
.sidebar {
    width: var(--sidebar-width);
    height: 100vh;
    display: flex;
    flex-direction: column;
    border-right: 1px solid var(--glass-border);
    border-radius: 0;
    position: fixed;
    left: 0;
    top: 0;
    z-index: 100;
    transition: transform var(--transition), opacity var(--transition);
}

.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 18px;
    box-shadow: 0 4px 15px rgba(var(--color-primary-rgb), 0.4);
}

.logo h1 {
    font-size: 1.25rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.sidebar-close {
    display: none;
}

.sidebar-section {
    padding: 16px 20px;
}

.sidebar-nav {
    flex: 1;
    overflow-y: auto;
    padding: 0 12px;
}

.nav-section {
    margin-bottom: 24px;
}

.nav-section-title {
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-tertiary);
    padding: 0 12px;
    margin-bottom: 6px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border-radius: var(--radius-md);
    border: none;
    background: none;
    color: var(--text-secondary);
    font-family: var(--font-family);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    width: 100%;
    text-align: left;
    transition: all var(--transition);
    position: relative;
}

.nav-item:hover {
    background: var(--hover-bg);
    color: var(--text-primary);
}

.nav-item.active {
    background: rgba(var(--color-primary-rgb), 0.15);
    color: var(--color-primary);
}

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

.nav-badge {
    margin-left: auto;
    font-size: 0.75rem;
    font-weight: 600;
    min-width: 20px;
    text-align: center;
    padding: 2px 6px;
    border-radius: var(--radius-full);
    background: rgba(var(--color-primary-rgb), 0.15);
    color: var(--color-primary);
}

.project-color-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
}

.sidebar-footer {
    padding: 12px;
    border-top: 1px solid var(--border-color);
}

/* === Main Content === */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    height: 100vh;
    overflow-y: auto;
    padding: 0 24px 24px;
    transition: margin-left var(--transition);
}

/* === Top Bar === */
.topbar {
    position: sticky;
    top: 0;
    z-index: 50;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    margin: 0 -24px;
    padding-left: 24px;
    padding-right: 24px;
    border-radius: 0;
    border-bottom: 1px solid var(--border-color);
    border-top: none;
    border-left: none;
    border-right: none;
}

.topbar-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

.topbar-left #sidebarToggle {
    display: none;
}

.view-title {
    font-size: 1.3rem;
    font-weight: 700;
}

.view-date {
    font-size: 0.85rem;
    color: var(--text-tertiary);
    font-weight: 500;
}

.topbar-right {
    display: flex;
    align-items: center;
    gap: 12px;
}

.search-container {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    border-radius: var(--radius-full);
    min-width: 240px;
    transition: all var(--transition);
}

.search-container:focus-within {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(var(--color-primary-rgb), 0.15);
}

.search-container i {
    color: var(--text-tertiary);
    font-size: 1rem;
}

.search-container input {
    flex: 1;
    background: none;
    border: none;
    outline: none;
    color: var(--text-primary);
    font-family: var(--font-family);
    font-size: 0.875rem;
}

.search-container input::placeholder {
    color: var(--text-tertiary);
}

.search-shortcut {
    font-size: 0.7rem;
    padding: 2px 6px;
    border-radius: 4px;
    background: var(--glass-subtle-bg);
    color: var(--text-tertiary);
    border: 1px solid var(--border-color);
    font-family: var(--font-family);
}

/* === Buttons === */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius-md);
    font-family: var(--font-family);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    color: white;
    box-shadow: 0 4px 15px rgba(var(--color-primary-rgb), 0.3);
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(var(--color-primary-rgb), 0.4);
}

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

.btn-ghost:hover {
    background: var(--hover-bg);
    color: var(--text-primary);
}

.btn-danger {
    background: rgba(var(--color-danger-rgb), 0.15);
    color: var(--color-danger);
}

.btn-danger:hover {
    background: rgba(var(--color-danger-rgb), 0.25);
}

.btn-sm {
    padding: 6px 14px;
    font-size: 0.8rem;
}

.btn-icon {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-md);
    border: none;
    background: none;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 1.2rem;
    transition: all var(--transition);
}

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

.btn-tiny {
    width: 22px;
    height: 22px;
    font-size: 0.85rem;
    border-radius: var(--radius-sm);
}

.btn-add-task {
    width: 100%;
    justify-content: center;
    padding: 12px;
    border-radius: var(--radius-lg);
}

/* === Stats Dashboard === */
.stats-dashboard {
    padding-top: 20px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 14px;
    margin-bottom: 16px;
}

.stat-card {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 18px;
    border-radius: var(--radius-lg);
    transition: transform var(--transition);
}

.stat-card:hover {
    transform: translateY(-2px);
}

.stat-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: var(--accent);
    background: linear-gradient(135deg, rgba(var(--color-primary-rgb), 0.15), rgba(var(--color-primary-rgb), 0.05));
}

.stat-icon:has(> .ri-checkbox-circle-line) {
    background: linear-gradient(135deg, rgba(var(--color-success-rgb), 0.15), rgba(var(--color-success-rgb), 0.05));
}

.stat-icon:has(> .ri-timer-line) {
    background: linear-gradient(135deg, rgba(var(--color-warning-rgb), 0.15), rgba(var(--color-warning-rgb), 0.05));
}

.stat-icon:has(> .ri-bar-chart-line) {
    background: linear-gradient(135deg, rgba(var(--color-accent-rgb), 0.15), rgba(var(--color-accent-rgb), 0.05));
}

.stat-info {
    display: flex;
    flex-direction: column;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 800;
    line-height: 1.2;
}

.stat-label {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    font-weight: 500;
}

/* === Chart === */
.chart-container {
    border-radius: var(--radius-lg);
    padding: 20px;
    margin-bottom: 16px;
}

.chart-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}

.chart-header h3 {
    font-size: 0.95rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
}

.chart-header h3 i {
    color: var(--color-primary);
}

.chart-legend {
    display: flex;
    gap: 16px;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.legend-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.chart-body {
    position: relative;
    height: 200px;
    margin-bottom: 16px;
}

.chart-body canvas {
    width: 100% !important;
    height: 100% !important;
}

.motivation-bar {
    padding-top: 12px;
    border-top: 1px solid var(--border-color);
}

.motivation-progress {
    height: 8px;
    background: var(--glass-subtle-bg);
    border-radius: var(--radius-full);
    overflow: hidden;
    margin-bottom: 10px;
}

.motivation-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--color-primary), var(--color-success));
    border-radius: var(--radius-full);
    transition: width 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.motivation-text {
    font-size: 0.8rem;
    color: var(--text-secondary);
    text-align: center;
    font-weight: 500;
}

/* === Filters Bar === */
.filters-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 10px;
    padding: 12px 16px;
    border-radius: var(--radius-lg);
    margin-bottom: 14px;
}

.filter-group {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.filter-chip {
    padding: 6px 14px;
    border-radius: var(--radius-full);
    border: 1px solid var(--border-color);
    background: none;
    color: var(--text-secondary);
    font-family: var(--font-family);
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition);
    display: flex;
    align-items: center;
    gap: 6px;
}

.filter-chip:hover {
    background: var(--hover-bg);
    color: var(--text-primary);
}

.filter-chip.active {
    background: rgba(var(--color-primary-rgb), 0.15);
    color: var(--color-primary);
    border-color: rgba(var(--color-primary-rgb), 0.3);
}

.priority-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.priority-dot.high { background: var(--color-danger); }
.priority-dot.medium { background: var(--color-warning); }
.priority-dot.low { background: var(--color-success); }

.filter-select {
    padding: 6px 12px;
    border-radius: var(--radius-md);
    font-family: var(--font-family);
    font-size: 0.8rem;
    color: var(--text-secondary);
    cursor: pointer;
    outline: none;
    min-width: 140px;
    appearance: auto;
}

/* === Task List === */
.task-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

/* === Task Item === */
.task-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 14px 16px;
    border-radius: var(--radius-lg);
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    transition: all var(--transition);
    cursor: pointer;
    position: relative;
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.task-item:hover {
    border-color: rgba(var(--color-primary-rgb), 0.3);
    transform: translateY(-1px);
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
}

.task-item.completed {
    opacity: 0.6;
}

.task-item.completed .task-title {
    text-decoration: line-through;
    color: var(--text-tertiary);
}

.task-item.completing {
    animation: completeAnim 0.5s ease forwards;
}

@keyframes completeAnim {
    0% { transform: scale(1); }
    30% { transform: scale(1.02); }
    100% { transform: scale(1); opacity: 0.6; }
}

.task-checkbox {
    position: relative;
    flex-shrink: 0;
    margin-top: 2px;
}

.task-checkbox input {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.task-checkbox .checkmark {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    border: 2px solid var(--text-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition);
    font-size: 12px;
    color: transparent;
}

.task-checkbox .checkmark.priority-high { border-color: var(--color-danger); }
.task-checkbox .checkmark.priority-medium { border-color: var(--color-warning); }
.task-checkbox .checkmark.priority-low { border-color: var(--color-success); }

.task-checkbox input:checked + .checkmark {
    background: var(--color-success);
    border-color: var(--color-success);
    color: white;
}

.task-content {
    flex: 1;
    min-width: 0;
}

.task-title {
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 4px;
    line-height: 1.4;
    transition: all var(--transition);
}

.task-desc {
    font-size: 0.78rem;
    color: var(--text-tertiary);
    margin-bottom: 6px;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.task-meta {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.task-meta-item {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 0.7rem;
    color: var(--text-tertiary);
    padding: 2px 8px;
    border-radius: var(--radius-full);
    background: var(--glass-subtle-bg);
}

.task-meta-item i {
    font-size: 0.75rem;
}

.task-meta-item.overdue {
    color: var(--color-danger);
    background: rgba(var(--color-danger-rgb), 0.1);
}

.task-tag {
    padding: 2px 8px;
    border-radius: var(--radius-full);
    font-size: 0.68rem;
    font-weight: 600;
    color: white;
}

.task-subtasks-progress {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.7rem;
    color: var(--text-tertiary);
}

.subtask-bar {
    width: 40px;
    height: 4px;
    border-radius: 2px;
    background: var(--glass-subtle-bg);
    overflow: hidden;
}

.subtask-bar-fill {
    height: 100%;
    background: var(--color-success);
    border-radius: 2px;
    transition: width var(--transition);
}

.task-actions {
    display: flex;
    align-items: center;
    gap: 4px;
    opacity: 0;
    transition: opacity var(--transition);
    flex-shrink: 0;
}

.task-item:hover .task-actions {
    opacity: 1;
}

.task-actions .btn-icon {
    width: 30px;
    height: 30px;
    font-size: 1rem;
}

/* === Empty State === */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 20px;
    text-align: center;
}

.empty-icon {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: var(--glass-subtle-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    color: var(--text-tertiary);
    margin-bottom: 20px;
}

.empty-state h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.empty-state p {
    color: var(--text-tertiary);
    font-size: 0.875rem;
    margin-bottom: 20px;
}

/* === Modals === */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s ease;
    padding: 20px;
}

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

.modal {
    width: 100%;
    max-width: 520px;
    max-height: 90vh;
    overflow-y: auto;
    border-radius: var(--radius-xl);
    transform: scale(0.95) translateY(10px);
    transition: transform 0.25s ease;
}

.modal-overlay.active .modal {
    transform: scale(1) translateY(0);
}

.modal-sm {
    max-width: 400px;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
    font-size: 1.1rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 8px;
}

.modal-body {
    padding: 24px;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    padding: 16px 24px;
    border-top: 1px solid var(--border-color);
}

/* === Forms === */
.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.required {
    color: var(--color-danger);
}

.form-input {
    width: 100%;
    padding: 10px 14px;
    border-radius: var(--radius-md);
    font-family: var(--font-family);
    font-size: 0.875rem;
    color: var(--text-primary);
    outline: none;
    transition: all var(--transition);
}

.form-input:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(var(--color-primary-rgb), 0.15);
}

.form-input::placeholder {
    color: var(--text-tertiary);
}

textarea.form-input {
    resize: vertical;
    min-height: 80px;
}

select.form-input {
    cursor: pointer;
    appearance: auto;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
}

/* Tags Input */
.tags-input-container {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    padding: 8px 12px;
    border-radius: var(--radius-md);
    min-height: 42px;
    align-items: center;
    position: relative;
}

.tags-input {
    flex: 1;
    min-width: 100px;
    border: none;
    background: none;
    outline: none;
    color: var(--text-primary);
    font-family: var(--font-family);
    font-size: 0.85rem;
}

.tags-input::placeholder {
    color: var(--text-tertiary);
}

.selected-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
}

.tag-chip {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 2px 8px;
    border-radius: var(--radius-full);
    font-size: 0.72rem;
    font-weight: 600;
    color: white;
    cursor: default;
}

.tag-chip .remove-tag {
    cursor: pointer;
    font-size: 0.85rem;
    opacity: 0.7;
    transition: opacity var(--transition);
    background: none;
    border: none;
    color: inherit;
    padding: 0;
    display: flex;
}

.tag-chip .remove-tag:hover {
    opacity: 1;
}

.tags-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    max-height: 150px;
    overflow-y: auto;
    z-index: 10;
    display: none;
    box-shadow: var(--shadow-md);
}

.tags-dropdown.show {
    display: block;
}

.tags-dropdown-item {
    padding: 8px 12px;
    font-size: 0.8rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: background var(--transition);
    border: none;
    background: none;
    width: 100%;
    color: var(--text-primary);
    font-family: var(--font-family);
}

.tags-dropdown-item:hover {
    background: var(--hover-bg);
}

/* Subtasks */
.subtasks-container {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-bottom: 8px;
}

.subtask-input-row {
    display: flex;
    align-items: center;
    gap: 8px;
}

.subtask-input-row input {
    flex: 1;
    padding: 8px 12px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    background: var(--input-bg);
    color: var(--text-primary);
    font-family: var(--font-family);
    font-size: 0.8rem;
    outline: none;
}

.subtask-input-row input:focus {
    border-color: var(--color-primary);
}

.subtask-input-row .btn-icon {
    width: 28px;
    height: 28px;
    font-size: 0.9rem;
}

/* Color Picker */
.color-picker, .icon-picker {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.color-option {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 3px solid transparent;
    cursor: pointer;
    transition: all var(--transition);
}

.color-option:hover {
    transform: scale(1.15);
}

.color-option.active {
    border-color: var(--text-primary);
    box-shadow: 0 0 0 2px var(--bg-primary);
}

.icon-option {
    width: 38px;
    height: 38px;
    border-radius: var(--radius-md);
    border: 2px solid var(--border-color);
    background: var(--glass-subtle-bg);
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    transition: all var(--transition);
}

.icon-option:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.icon-option.active {
    border-color: var(--color-primary);
    background: rgba(var(--color-primary-rgb), 0.15);
    color: var(--color-primary);
}

.color-picker-mini {
    display: flex;
    gap: 6px;
}

.color-option-mini {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    border: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition);
}

.color-option-mini:hover {
    transform: scale(1.15);
}

.color-option-mini.active {
    border-color: var(--text-primary);
    box-shadow: 0 0 0 2px var(--bg-primary);
}

/* === Settings === */
.settings-section {
    margin-bottom: 24px;
}

.settings-section h4 {
    font-size: 0.85rem;
    font-weight: 700;
    margin-bottom: 14px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.setting-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 0;
    border-bottom: 1px solid var(--border-color);
    gap: 12px;
}

.setting-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.setting-info span:first-child {
    font-size: 0.875rem;
    font-weight: 500;
}

.setting-desc {
    font-size: 0.75rem;
    color: var(--text-tertiary);
}

/* Toggle Switch */
.toggle {
    position: relative;
    display: inline-block;
    width: 44px;
    height: 24px;
    flex-shrink: 0;
}

.toggle input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    inset: 0;
    background: var(--glass-subtle-bg);
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition);
    border: 1px solid var(--border-color);
}

.toggle-slider::before {
    content: '';
    position: absolute;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--text-secondary);
    top: 2px;
    left: 2px;
    transition: all var(--transition);
}

.toggle input:checked + .toggle-slider {
    background: var(--color-primary);
    border-color: var(--color-primary);
}

.toggle input:checked + .toggle-slider::before {
    transform: translateX(20px);
    background: white;
}

/* Shortcuts */
.shortcuts-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.shortcut-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.shortcut-item kbd {
    padding: 2px 8px;
    border-radius: 4px;
    background: var(--glass-subtle-bg);
    border: 1px solid var(--border-color);
    font-family: var(--font-family);
    font-size: 0.72rem;
    color: var(--text-tertiary);
}

.shortcut-item span {
    margin-left: auto;
    color: var(--text-tertiary);
}

.settings-footer {
    text-align: center;
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
}

.app-info {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    margin-bottom: 4px;
}

/* === Context Menu === */
.context-menu {
    position: fixed;
    min-width: 180px;
    border-radius: var(--radius-md);
    padding: 6px;
    z-index: 2000;
    display: none;
}

.context-menu.show {
    display: block;
    animation: fadeScale 0.15s ease;
}

@keyframes fadeScale {
    from { opacity: 0; transform: scale(0.95); }
    to { opacity: 1; transform: scale(1); }
}

.context-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    border: none;
    background: none;
    color: var(--text-secondary);
    font-family: var(--font-family);
    font-size: 0.8rem;
    cursor: pointer;
    width: 100%;
    text-align: left;
    transition: all var(--transition);
}

.context-item:hover {
    background: var(--hover-bg);
    color: var(--text-primary);
}

.context-danger:hover {
    background: rgba(var(--color-danger-rgb), 0.1);
    color: var(--color-danger);
}

.context-divider {
    height: 1px;
    background: var(--border-color);
    margin: 4px 0;
}

/* === Toasts === */
.toast-container {
    position: fixed;
    bottom: 24px;
    right: 24px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    z-index: 3000;
}

.toast {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 18px;
    border-radius: var(--radius-md);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-lg);
    font-size: 0.85rem;
    animation: toastIn 0.3s ease;
    min-width: 250px;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

.toast.toast-out {
    animation: toastOut 0.3s ease forwards;
}

@keyframes toastIn {
    from { opacity: 0; transform: translateX(30px); }
    to { opacity: 1; transform: translateX(0); }
}

@keyframes toastOut {
    from { opacity: 1; transform: translateX(0); }
    to { opacity: 0; transform: translateX(30px); }
}

.toast i {
    font-size: 1.1rem;
}

.toast-success i { color: var(--color-success); }
.toast-error i { color: var(--color-danger); }
.toast-info i { color: var(--color-info); }

/* === Drag & Drop === */
.task-item.dragging {
    opacity: 0.5;
    transform: scale(0.98);
}

.task-item.drag-over {
    border-top: 2px solid var(--color-primary);
}

/* === Responsive === */
@media (max-width: 1024px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }

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

    .sidebar-close {
        display: flex;
    }

    .main-content {
        margin-left: 0;
    }

    .topbar-left #sidebarToggle {
        display: flex;
    }

    .search-container {
        min-width: unset;
        flex: 1;
    }

    .search-shortcut {
        display: none;
    }

    .filters-bar {
        flex-direction: column;
        align-items: stretch;
    }

    .filter-group {
        flex-wrap: wrap;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

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

    .chart-header {
        flex-direction: column;
        gap: 8px;
        align-items: flex-start;
    }
}

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr 1fr;
        gap: 8px;
    }

    .stat-card {
        padding: 12px;
    }

    .stat-value {
        font-size: 1.2rem;
    }

    .main-content {
        padding: 0 12px 12px;
    }

    .topbar {
        margin: 0 -12px;
        padding-left: 12px;
        padding-right: 12px;
    }
}

/* === Login Screen === */
.login-screen {
    position: fixed;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 5000;
    padding: 20px;
}

.login-card {
    width: 100%;
    max-width: 420px;
    border-radius: var(--radius-xl);
    padding: 40px 32px;
    animation: loginAppear 0.5s ease;
}

@keyframes loginAppear {
    from { opacity: 0; transform: translateY(20px) scale(0.97); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

.login-logo {
    text-align: center;
    margin-bottom: 32px;
}

.logo-icon-lg {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-lg);
    font-size: 28px;
    margin: 0 auto 16px;
}

.login-title {
    font-size: 2rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 8px;
}

.login-subtitle {
    font-size: 0.9rem;
    color: var(--text-tertiary);
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.btn-login {
    width: 100%;
    justify-content: center;
    padding: 14px;
    border-radius: var(--radius-lg);
    font-size: 0.95rem;
    margin-top: 8px;
}

.login-switch {
    text-align: center;
    font-size: 0.8rem;
    color: var(--text-tertiary);
    margin-top: 16px;
}

.login-switch a {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 600;
}

.login-switch a:hover {
    text-decoration: underline;
}

.login-error {
    font-size: 0.8rem;
    color: var(--color-danger);
    min-height: 20px;
    text-align: center;
}

.login-footer {
    margin-top: 24px;
    font-size: 0.8rem;
    color: var(--text-tertiary);
    font-weight: 600;
}

/* User Welcome */
.user-welcome {
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-weight: 500;
    white-space: nowrap;
}

@media (max-width: 480px) {
    .login-card {
        padding: 28px 20px;
    }

    .user-welcome {
        display: none;
    }
}

/* === Footer Signature === */
.app-footer {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 90;
    display: flex;
    justify-content: center;
    padding: 12px 16px;
    pointer-events: none;
}

.footer-pills {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 16px;
    border-radius: var(--radius-full);
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
    pointer-events: auto;
}

.footer-brand {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    white-space: nowrap;
}

.footer-pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border-radius: var(--radius-full);
    font-family: var(--font-family);
    font-size: 0.78rem;
    font-weight: 600;
    text-decoration: none;
    transition: all var(--transition);
    white-space: nowrap;
}

.footer-pill i {
    font-size: 1rem;
}

.footer-pill-youtube {
    background: rgba(255, 0, 0, 0.12);
    color: #FF0000;
    border: 1px solid rgba(255, 0, 0, 0.2);
}

.footer-pill-youtube:hover {
    background: rgba(255, 0, 0, 0.22);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(255, 0, 0, 0.2);
}

.footer-pill-site {
    background: rgba(var(--color-primary-rgb), 0.12);
    color: var(--color-primary);
    border: 1px solid rgba(var(--color-primary-rgb), 0.2);
}

.footer-pill-site:hover {
    background: rgba(var(--color-primary-rgb), 0.22);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(var(--color-primary-rgb), 0.2);
}

@media (max-width: 480px) {
    .footer-pills {
        flex-wrap: wrap;
        justify-content: center;
        gap: 6px;
        padding: 6px 12px;
    }

    .footer-brand {
        font-size: 0.72rem;
        width: 100%;
        text-align: center;
    }

    .footer-pill {
        padding: 4px 10px;
        font-size: 0.72rem;
    }
}

/* ============================================
   Loading Overlay
   ============================================ */
.loading-overlay {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    background: var(--bg-primary, #0a0a1a);
    transition: opacity 0.4s ease, visibility 0.4s ease;
}

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

.loading-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

.loading-text {
    color: var(--text-secondary, rgba(255,255,255,0.7));
    font-family: var(--font-family);
    font-size: 0.9rem;
    font-weight: 500;
}

.spinner {
    width: 36px;
    height: 36px;
    border: 3px solid var(--glass-border, rgba(255,255,255,0.1));
    border-top-color: var(--color-primary, #6C5CE7);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Button loading state */
.btn.btn-loading {
    opacity: 0.7;
    pointer-events: none;
    position: relative;
}

.btn.btn-loading::after {
    content: '';
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255,255,255,0.3);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
    margin-left: 8px;
    display: inline-block;
    vertical-align: middle;
}