@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary: #a855f7;
    --accent: #06b6d4;
    --success: #22c55e;
    --danger: #ef4444;
    --warning: #f59e0b;
    --info: #3b82f6;

    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(255, 255, 255, 0.2);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
    --glass-blur: blur(16px);

    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --bg-hover: #e2e8f0;
    --bg-card: rgba(255, 255, 255, 0.85);

    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-tertiary: #94a3b8;

    --border: rgba(226, 232, 240, 0.8);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04);
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.08);
    --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.1);
    --shadow-glow: 0 0 30px rgba(99, 102, 241, 0.2);

    --sidebar-width: 300px;
    --header-height: 80px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
}

body.dark-mode {
    --glass-bg: rgba(30, 41, 59, 0.7);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --bg-hover: #475569;
    --bg-card: rgba(30, 41, 59, 0.85);
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-tertiary: #64748b;
    --border: rgba(51, 65, 85, 0.8);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.2);
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.4);
    --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.5);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-secondary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(ellipse 80% 50% at 0% 0%, rgba(99, 102, 241, 0.08) 0%, transparent 100%),
        radial-gradient(ellipse 80% 50% at 100% 100%, rgba(168, 85, 247, 0.08) 0%, transparent 100%);
    pointer-events: none;
    z-index: 0;
}

body.dark-mode::before {
    background:
        radial-gradient(ellipse 80% 50% at 0% 0%, rgba(99, 102, 241, 0.12) 0%, transparent 100%),
        radial-gradient(ellipse 80% 50% at 100% 100%, rgba(168, 85, 247, 0.12) 0%, transparent 100%);
}

body.no-animations * {
    animation: none !important;
    transition: none !important;
}

body.focus-mode .sidebar,
body.focus-mode .main-header,
body.focus-mode .progress-section,
body.focus-mode .quick-actions {
    display: none;
}

body.focus-mode .tasks-container {
    padding-top: 40px;
}

#particles-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
}

.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #6366f1, #a855f7, #06b6d4);
    background-size: 300% 300%;
    animation: gradientShift 3s ease infinite;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.6s ease, visibility 0.6s ease;
}

.loading-screen.hidden {
    opacity: 0;
    visibility: hidden;
}

@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.loader {
    width: 60px;
    height: 60px;
    border: 4px solid rgba(255, 255, 255, 0.15);
    border-top-color: white;
    border-right-color: rgba(255, 255, 255, 0.5);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    box-shadow: 0 0 40px rgba(255, 255, 255, 0.1);
}

.loading-screen p {
    color: white;
    margin-top: 24px;
    font-size: 18px;
    font-weight: 500;
    letter-spacing: 0.5px;
    animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

.loading-screen .loader-text {
    color: rgba(255, 255, 255, 0.7);
    font-size: 13px;
    margin-top: 8px;
    letter-spacing: 2px;
    text-transform: uppercase;
}

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

.app-container {
    display: flex;
    height: 100vh;
    overflow: hidden;
    position: relative;
    z-index: 1;
}

.sidebar {
    width: var(--sidebar-width);
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-right: 1px solid var(--glass-border);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    transition: var(--transition);
    position: relative;
    z-index: 100;
}

.sidebar-header {
    padding: 20px 20px 16px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

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

.logo-icon {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 18px;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.logo h1 {
    font-size: 18px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.sidebar-toggle {
    display: none;
    width: 36px;
    height: 36px;
    border: none;
    background: var(--glass-bg);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
    color: var(--text-secondary);
    font-size: 18px;
}

.sidebar-toggle:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.user-profile {
    padding: 16px 20px;
    display: flex;
    align-items: center;
    gap: 12px;
    border-bottom: 1px solid var(--border);
}

.user-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 18px;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.25);
    flex-shrink: 0;
}

.user-info h3 {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
}

.user-info p {
    font-size: 12px;
    color: var(--text-tertiary);
}

.streak-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    background: linear-gradient(135deg, #f59e0b, #ef4444);
    color: white;
    padding: 2px 10px;
    border-radius: 999px;
    font-size: 11px;
    font-weight: 700;
    margin-left: 8px;
    box-shadow: 0 2px 8px rgba(245, 158, 11, 0.3);
}

.quick-stats {
    padding: 16px 20px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    border-bottom: 1px solid var(--border);
}

.stat-card {
    background: var(--glass-bg);
    backdrop-filter: blur(8px);
    padding: 12px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    gap: 10px;
    transition: var(--transition);
    border: 1px solid var(--glass-border);
    cursor: default;
}

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

.stat-card i {
    font-size: 22px;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    flex-shrink: 0;
}

.stat-card:nth-child(1) i {
    background: rgba(34, 197, 94, 0.1);
    color: var(--success);
}

.stat-card:nth-child(2) i {
    background: rgba(245, 158, 11, 0.1);
    color: var(--warning);
}

.stat-number {
    display: block;
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
}

.stat-label {
    display: block;
    font-size: 11px;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.sidebar-nav {
    padding: 12px 12px 8px;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 14px;
    background: none;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    width: 100%;
    text-align: left;
    position: relative;
    overflow: hidden;
}

.nav-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    height: 20px;
    width: 3px;
    background: var(--primary);
    border-radius: 0 3px 3px 0;
    opacity: 0;
    transition: var(--transition);
}

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

.nav-item.active {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(168, 85, 247, 0.1));
    color: var(--primary);
    font-weight: 600;
}

.nav-item.active::before {
    opacity: 1;
}

.nav-item i {
    font-size: 16px;
    width: 20px;
    text-align: center;
}

.nav-item .count {
    background: var(--bg-tertiary);
    padding: 1px 8px;
    border-radius: 999px;
    font-size: 11px;
    font-weight: 600;
    min-width: 22px;
    text-align: center;
}

.nav-item.active .count {
    background: rgba(99, 102, 241, 0.15);
    color: var(--primary);
}

.categories-section {
    padding: 12px 12px;
    border-top: 1px solid var(--border);
    flex: 1;
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 8px;
    padding: 0 14px;
}

.section-header h3 {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.8px;
}

.icon-btn {
    width: 26px;
    height: 26px;
    border: none;
    background: var(--glass-bg);
    border-radius: 6px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-tertiary);
    font-size: 12px;
}

.icon-btn:hover {
    background: var(--primary);
    color: white;
    transform: scale(1.1);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

#categories-list, #workspaces-list {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.category-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 14px;
    background: none;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
    color: var(--text-secondary);
    font-size: 13px;
    width: 100%;
    text-align: left;
}

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

.category-item.active {
    background: var(--bg-hover);
    color: var(--text-primary);
    font-weight: 600;
}

.category-icon {
    width: 28px;
    height: 28px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    flex-shrink: 0;
}

.category-item span {
    flex: 1;
}

.category-item .count {
    font-size: 11px;
    color: var(--text-tertiary);
    background: var(--bg-tertiary);
    padding: 1px 7px;
    border-radius: 999px;
    min-width: 20px;
    text-align: center;
}

.sidebar-footer {
    padding: 12px 12px;
    border-top: 1px solid var(--border);
    display: flex;
    gap: 6px;
}

.settings-btn {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    background: none;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
    color: var(--text-secondary);
    font-size: 14px;
}

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

.theme-toggle {
    width: 40px;
    height: 40px;
    border: none;
    background: var(--glass-bg);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
    color: var(--text-secondary);
    font-size: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.theme-toggle:hover {
    background: var(--primary);
    color: white;
    transform: rotate(20deg);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    position: relative;
}

.main-header {
    height: var(--header-height);
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-bottom: 1px solid var(--glass-border);
    padding: 20px 32px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 50;
}

.header-left h2 {
    font-size: 26px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 2px;
    letter-spacing: -0.5px;
}

.header-left p {
    font-size: 14px;
    color: var(--text-tertiary);
}

.header-right {
    display: flex;
    align-items: center;
    gap: 10px;
}

.search-box {
    position: relative;
    display: flex;
    align-items: center;
}

.search-box i {
    position: absolute;
    left: 14px;
    color: var(--text-tertiary);
    font-size: 15px;
    pointer-events: none;
}

.search-box input {
    padding: 10px 14px 10px 42px;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: var(--glass-bg);
    color: var(--text-primary);
    font-size: 14px;
    width: 260px;
    transition: var(--transition);
    font-family: inherit;
}

.search-box input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
    width: 300px;
}

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

.filter-panel {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-bottom: 1px solid var(--glass-border);
    padding: 20px 32px;
    display: none;
    animation: slideDown 0.3s ease;
}

.filter-panel.active {
    display: block;
}

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

.filter-group {
    margin-bottom: 14px;
}

.filter-group:last-child {
    margin-bottom: 0;
}

.filter-group label {
    display: block;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-tertiary);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.filter-options {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.filter-option,
.sort-option {
    padding: 7px 16px;
    background: var(--glass-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 13px;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
    font-weight: 500;
}

.filter-option:hover,
.sort-option:hover {
    background: var(--bg-hover);
    transform: translateY(-1px);
}

.filter-option.active,
.sort-option.active {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    border-color: transparent;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.progress-section {
    padding: 16px 32px;
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-bottom: 1px solid var(--glass-border);
}

.progress-info {
    display: flex;
    justify-content: space-between;
    margin-bottom: 8px;
    font-size: 13px;
    color: var(--text-secondary);
    font-weight: 500;
}

.progress-bar {
    height: 6px;
    background: var(--bg-tertiary);
    border-radius: 999px;
    overflow: hidden;
    position: relative;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--secondary), var(--accent));
    background-size: 200% 100%;
    animation: shimmer 3s ease infinite;
    border-radius: 999px;
    transition: width 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes shimmer {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.quick-actions {
    padding: 16px 32px 0;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.calendar-view-panel {
    padding: 20px 32px;
}

.calendar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.calendar-header h3 {
    font-size: 18px;
    font-weight: 600;
}

.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, minmax(0, 1fr));
    gap: 6px;
}

.calendar-cell {
    min-height: 80px;
    background: var(--glass-bg);
    backdrop-filter: blur(4px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    padding: 6px;
    color: var(--text-primary);
    cursor: pointer;
    transition: var(--transition);
    font-size: 13px;
}

.calendar-cell:hover {
    background: var(--bg-hover);
    transform: translateY(-1px);
}

.calendar-cell.muted {
    opacity: 0.3;
}

.calendar-cell.active {
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.15);
}

.calendar-task-count {
    margin-top: 4px;
    font-size: 11px;
    color: var(--text-tertiary);
}

.focus-row {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.template-card {
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 14px;
    margin-bottom: 10px;
    background: var(--glass-bg);
    backdrop-filter: blur(4px);
    transition: var(--transition);
}

.template-card:hover {
    border-color: var(--primary-light);
    box-shadow: var(--shadow);
}

.template-card strong {
    font-size: 15px;
    color: var(--text-primary);
}

.template-card div {
    font-size: 13px;
    color: var(--text-secondary);
    margin: 8px 0;
    line-height: 1.8;
}

.template-card button {
    margin-top: 6px;
}

.insight-panel {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px;
}

.insight-card {
    background: var(--glass-bg);
    backdrop-filter: blur(4px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: 12px 14px;
    transition: var(--transition);
}

.insight-card:hover {
    box-shadow: var(--shadow);
    transform: translateY(-1px);
}

.insight-label {
    display: block;
    font-size: 11px;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 4px;
    font-weight: 600;
}

.insight-card strong {
    font-size: 16px;
    color: var(--text-primary);
}

.quick-add {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    align-items: center;
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 14px;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.quick-add:focus-within {
    box-shadow: var(--shadow-lg), 0 0 0 4px rgba(99, 102, 241, 0.08);
    border-color: var(--primary-light);
}

.quick-add input[type="text"] {
    flex: 1;
    min-width: 200px;
    padding: 9px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 14px;
    font-family: inherit;
    transition: var(--transition);
}

.quick-add input[type="text"]:focus {
    outline: none;
    border-color: var(--primary);
}

.quick-add input[type="date"],
.quick-add select {
    min-width: 130px;
    padding: 9px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 13px;
    font-family: inherit;
}

.bulk-actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.tasks-container {
    flex: 1;
    overflow-y: auto;
    padding: 20px 32px 100px;
}

.tasks-container[hidden],
.calendar-view-panel[hidden] {
    display: none !important;
}

.tasks-container.grid-view {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
    align-content: start;
}

.tasks-container.grid-view .task-card {
    margin-bottom: 0;
}

.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--text-tertiary);
    animation: fadeIn 0.6s ease;
    text-align: center;
    padding: 40px;
}

.empty-state i {
    font-size: 72px;
    margin-bottom: 20px;
    opacity: 0.3;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.empty-state h3 {
    font-size: 22px;
    margin-bottom: 8px;
    color: var(--text-secondary);
    font-weight: 600;
}

.empty-state p {
    font-size: 14px;
    margin-bottom: 24px;
    color: var(--text-tertiary);
}

.task-card {
    background: var(--glass-bg);
    backdrop-filter: blur(8px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 18px 20px;
    margin-bottom: 10px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
    animation: taskSlideIn 0.4s ease both;
    position: relative;
    overflow: hidden;
}

.task-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, transparent 60%, rgba(99, 102, 241, 0.03));
    pointer-events: none;
}

@keyframes taskSlideIn {
    from { opacity: 0; transform: translateY(16px) scale(0.98); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

.task-card:nth-child(1) { animation-delay: 0.02s; }
.task-card:nth-child(2) { animation-delay: 0.04s; }
.task-card:nth-child(3) { animation-delay: 0.06s; }
.task-card:nth-child(4) { animation-delay: 0.08s; }
.task-card:nth-child(5) { animation-delay: 0.10s; }
.task-card:nth-child(6) { animation-delay: 0.12s; }
.task-card:nth-child(7) { animation-delay: 0.14s; }
.task-card:nth-child(8) { animation-delay: 0.16s; }
.task-card:nth-child(9) { animation-delay: 0.18s; }
.task-card:nth-child(10) { animation-delay: 0.20s; }

.task-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
    border-color: var(--primary-light);
}

.task-card.completed {
    opacity: 0.55;
}

.task-card.completed:hover {
    opacity: 0.7;
}

.task-card.overdue {
    border-color: rgba(239, 68, 68, 0.25);
    box-shadow: inset 0 0 0 1px rgba(239, 68, 68, 0.08);
}

.task-card.due-soon {
    border-color: rgba(245, 158, 11, 0.25);
}

.task-card.dragging {
    opacity: 0.4;
    transform: rotate(1deg) scale(0.98);
}

.task-header {
    display: flex;
    align-items: flex-start;
    gap: 12px;
}

.task-checkbox {
    width: 22px;
    height: 22px;
    border: 2px solid var(--border);
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition);
    flex-shrink: 0;
    margin-top: 2px;
    position: relative;
}

.task-checkbox:hover {
    border-color: var(--primary);
    transform: scale(1.15);
    box-shadow: 0 0 20px rgba(99, 102, 241, 0.15);
}

.task-checkbox.checked {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-color: transparent;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.task-checkbox.checked::after {
    content: '\f00c';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    color: white;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 11px;
}

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

.task-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
    line-height: 1.4;
}

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

.task-description {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 10px;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.task-meta {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: 6px;
}

.task-meta-item {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 12px;
    color: var(--text-tertiary);
}

.task-meta-item i {
    font-size: 11px;
}

.task-priority {
    padding: 3px 10px;
    border-radius: 999px;
    font-size: 10px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.task-priority.high {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger);
}

.task-priority.medium {
    background: rgba(245, 158, 11, 0.1);
    color: var(--warning);
}

.task-priority.low {
    background: rgba(34, 197, 94, 0.1);
    color: var(--success);
}

.task-category-badge {
    padding: 3px 10px;
    border-radius: 999px;
    font-size: 11px;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 5px;
}

.task-tags {
    display: flex;
    gap: 5px;
    flex-wrap: wrap;
    margin-bottom: 6px;
}

.task-tag {
    padding: 3px 10px;
    background: var(--bg-tertiary);
    border-radius: 999px;
    font-size: 11px;
    color: var(--text-secondary);
    font-weight: 500;
}

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

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

.task-action-btn {
    width: 30px;
    height: 30px;
    border: none;
    background: none;
    border-radius: 6px;
    cursor: pointer;
    transition: var(--transition);
    color: var(--text-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
}

.task-action-btn:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
    transform: scale(1.1);
}

.task-action-btn.important {
    color: var(--warning);
}

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

.task-subtasks {
    margin-top: 10px;
    padding-top: 10px;
    border-top: 1px solid var(--border);
}

.task-subtask {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 4px 0;
    font-size: 13px;
    color: var(--text-secondary);
}

.task-subtask input[type="checkbox"] {
    width: 15px;
    height: 15px;
    cursor: pointer;
    accent-color: var(--primary);
}

.fab {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    border: none;
    font-size: 22px;
    cursor: pointer;
    box-shadow: 0 8px 32px rgba(99, 102, 241, 0.35);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 99;
    display: flex;
    align-items: center;
    justify-content: center;
}

.fab:hover {
    transform: scale(1.1) rotate(90deg);
    box-shadow: 0 12px 48px rgba(99, 102, 241, 0.45);
}

.fab:active {
    transform: scale(0.95);
}

.fab .fab-tooltip {
    position: absolute;
    right: 66px;
    background: var(--text-primary);
    color: var(--bg-primary);
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    font-size: 12px;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: var(--transition);
    font-weight: 500;
}

.fab:hover .fab-tooltip {
    opacity: 1;
}

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
    animation: fadeIn 0.25s ease;
}

.modal-content {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    width: 90%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
    animation: modalSlideIn 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.modal-content.small {
    max-width: 450px;
}

@keyframes modalSlideIn {
    from { opacity: 0; transform: translateY(-24px) scale(0.96); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

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

.modal-header h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
}

.close-btn {
    width: 32px;
    height: 32px;
    border: none;
    background: none;
    border-radius: 6px;
    cursor: pointer;
    transition: var(--transition);
    color: var(--text-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
}

.close-btn:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
    transform: rotate(90deg);
}

.modal-body {
    padding: 24px;
}

.modal-footer {
    display: flex;
    gap: 10px;
    justify-content: flex-end;
    margin-top: 24px;
}

.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.form-group input[type="text"],
.form-group input[type="date"],
.form-group input[type="time"],
.form-group input[type="datetime-local"],
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--glass-bg);
    color: var(--text-primary);
    font-size: 14px;
    font-family: inherit;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.08);
}

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

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

.checkbox-group label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-weight: 500;
    font-size: 14px;
}

.checkbox-group input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: var(--primary);
}

.color-picker-grid {
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    gap: 8px;
}

.color-option {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
    border: 2px solid transparent;
    cursor: pointer;
    transition: 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), 0 0 20px rgba(99, 102, 241, 0.2);
}

.subtask-item {
    display: flex;
    gap: 8px;
    margin-bottom: 8px;
}

.subtask-item input {
    flex: 1;
    padding: 8px 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--glass-bg);
    color: var(--text-primary);
    font-size: 13px;
    font-family: inherit;
}

.subtask-item input:focus {
    outline: none;
    border-color: var(--primary);
}

.subtask-item button {
    padding: 8px 12px;
    background: var(--danger);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
    font-size: 13px;
}

.subtask-item button:hover {
    opacity: 0.85;
    transform: scale(1.05);
}

.add-subtask-btn {
    width: 100%;
    padding: 10px;
    background: none;
    border: 1px dashed var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-tertiary);
    font-size: 13px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-family: inherit;
}

.add-subtask-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: rgba(99, 102, 241, 0.05);
}

.btn {
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: inherit;
    position: relative;
    overflow: hidden;
}

.btn::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:active::after {
    width: 300px;
    height: 300px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    box-shadow: 0 4px 14px rgba(99, 102, 241, 0.25);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.35);
}

.btn-secondary {
    background: var(--glass-bg);
    backdrop-filter: blur(4px);
    color: var(--text-primary);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    background: var(--bg-hover);
    transform: translateY(-1px);
}

.btn-danger {
    background: linear-gradient(135deg, var(--danger), #dc2626);
    color: white;
    box-shadow: 0 4px 14px rgba(239, 68, 68, 0.25);
}

.btn-danger:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(239, 68, 68, 0.35);
}

.settings-section {
    margin-bottom: 24px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border);
}

.settings-section:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.settings-section h4 {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.setting-item {
    margin-bottom: 12px;
}

.setting-item label {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    font-size: 14px;
    color: var(--text-primary);
}

.setting-item input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: var(--primary);
}

.settings-section button {
    margin-right: 10px;
    margin-bottom: 8px;
}

.toast {
    position: fixed;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%) translateY(120px);
    background: var(--success);
    color: white;
    padding: 14px 24px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl), 0 0 40px rgba(34, 197, 94, 0.15);
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 14px;
    font-weight: 500;
    z-index: 2000;
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    backdrop-filter: blur(8px);
    min-width: 280px;
    justify-content: space-between;
}

.toast-action {
    display: none;
    border: none;
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border-radius: 999px;
    padding: 6px 12px;
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
}

.toast-action:hover {
    background: rgba(255, 255, 255, 0.3);
}

.toast.show {
    transform: translateX(-50%) translateY(0);
}

.toast i {
    font-size: 18px;
}

#confetti-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 9998;
}

::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 999px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-tertiary);
}

.pomodoro-container {
    padding: 16px 32px;
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-bottom: 1px solid var(--glass-border);
    display: none;
}

.pomodoro-container.active {
    display: block;
    animation: slideDown 0.3s ease;
}

.pomodoro-inner {
    display: flex;
    align-items: center;
    gap: 20px;
    flex-wrap: wrap;
}

.pomodoro-display {
    display: flex;
    align-items: center;
    gap: 16px;
}

.pomodoro-timer {
    font-size: 36px;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    letter-spacing: 2px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    min-width: 140px;
}

.pomodoro-status {
    font-size: 13px;
    color: var(--text-tertiary);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.pomodoro-controls {
    display: flex;
    gap: 8px;
}

.pomodoro-btn {
    width: 36px;
    height: 36px;
    border: none;
    border-radius: 50%;
    background: var(--glass-bg);
    backdrop-filter: blur(4px);
    border: 1px solid var(--border);
    cursor: pointer;
    transition: var(--transition);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 15px;
}

.pomodoro-btn:hover {
    background: var(--primary);
    color: white;
    border-color: transparent;
    transform: scale(1.1);
}

.pomodoro-btn.active {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    border-color: transparent;
    box-shadow: 0 4px 14px rgba(99, 102, 241, 0.3);
}

.pomodoro-stats {
    display: flex;
    gap: 16px;
    margin-left: auto;
}

.pomodoro-stat {
    text-align: center;
}

.pomodoro-stat strong {
    display: block;
    font-size: 18px;
    color: var(--text-primary);
}

.pomodoro-stat span {
    font-size: 11px;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stats-modal-content {
    max-width: 700px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
    margin-bottom: 20px;
}

.stats-card {
    background: var(--glass-bg);
    backdrop-filter: blur(4px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 18px;
    text-align: center;
}

.stats-card .stat-value {
    font-size: 32px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stats-card .stat-label {
    font-size: 12px;
    color: var(--text-tertiary);
    margin-top: 4px;
}

.stats-chart {
    background: var(--glass-bg);
    backdrop-filter: blur(4px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 20px;
}

.stats-chart h4 {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 14px;
    color: var(--text-primary);
}

.chart-bars {
    display: flex;
    align-items: flex-end;
    gap: 6px;
    height: 140px;
    padding-top: 10px;
}

.chart-bar {
    flex: 1;
    border-radius: 4px 4px 0 0;
    background: linear-gradient(to top, var(--primary), var(--secondary));
    transition: height 0.8s cubic-bezier(0.4, 0, 0.2, 1);
    min-height: 4px;
    position: relative;
    cursor: pointer;
}

.chart-bar:hover {
    opacity: 0.8;
}

.chart-bar-label {
    position: absolute;
    bottom: -20px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 10px;
    color: var(--text-tertiary);
    white-space: nowrap;
}

.chart-bar-value {
    position: absolute;
    top: -18px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 10px;
    font-weight: 600;
    color: var(--primary);
    opacity: 0;
    transition: var(--transition);
}

.chart-bar:hover .chart-bar-value {
    opacity: 1;
}

.shortcuts-modal-content {
    max-width: 500px;
}

.shortcuts-grid {
    display: grid;
    gap: 8px;
}

.shortcut-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 14px;
    background: var(--glass-bg);
    backdrop-filter: blur(4px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
}

.shortcut-item span {
    font-size: 14px;
    color: var(--text-primary);
}

.shortcut-key {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    background: var(--bg-tertiary);
    border-radius: 6px;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    font-family: inherit;
    border: 1px solid var(--border);
}

@media (max-width: 1024px) {
    .sidebar {
        width: 260px;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .calendar-grid {
        gap: 4px;
    }

    .calendar-cell {
        min-height: 60px;
        padding: 4px;
        font-size: 12px;
    }

    .quick-actions {
        padding: 12px 16px 0;
    }

    .insight-panel {
        grid-template-columns: 1fr;
    }

    .quick-add {
        flex-direction: column;
        align-items: stretch;
    }

    .quick-add input[type="text"],
    .quick-add input[type="date"],
    .quick-add select {
        width: 100%;
        min-width: 0;
    }

    .sidebar {
        position: fixed;
        left: -300px;
        z-index: 999;
        height: 100vh;
    }

    .sidebar.active {
        left: 0;
        box-shadow: var(--shadow-xl);
    }

    .sidebar-toggle {
        display: flex;
    }

    .main-header {
        padding: 14px 16px;
        height: auto;
        flex-wrap: wrap;
        gap: 10px;
    }

    .header-left h2 {
        font-size: 20px;
    }

    .search-box input {
        width: 160px;
    }

    .search-box input:focus {
        width: 200px;
    }

    .tasks-container {
        padding: 12px 16px 90px;
    }

    .tasks-container.grid-view {
        grid-template-columns: 1fr;
    }

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

    .fab {
        bottom: 20px;
        right: 20px;
        width: 52px;
        height: 52px;
        font-size: 20px;
    }

    .pomodoro-inner {
        flex-direction: column;
        align-items: stretch;
    }

    .pomodoro-stats {
        margin-left: 0;
    }
}

.animate-bounce-in {
    animation: bounceIn 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

@keyframes bounceIn {
    0% { opacity: 0; transform: scale(0.3); }
    50% { opacity: 1; transform: scale(1.05); }
    70% { transform: scale(0.9); }
    100% { transform: scale(1); }
}