:root {
    --bg-dark: #0f111a;
    --bg-panel: rgba(26, 29, 41, 0.6);
    --bg-panel-hover: rgba(40, 44, 60, 0.8);
    --border-color: rgba(255, 255, 255, 0.08);
    --text-primary: #f8f9fa;
    --text-secondary: #a0aabf;
    
    --work-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --home-gradient: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
    
    --priority-high: #ff4757;
    --priority-medium: #ffa502;
    --priority-low: #2ed573;
    
    --shadow-sm: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.2);
}

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

body {
    font-family: 'Outfit', sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
}

/* Dynamic Animated Background */
.app-background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    background: radial-gradient(circle at 15% 50%, rgba(79, 172, 254, 0.08), transparent 25%),
                radial-gradient(circle at 85% 30%, rgba(250, 112, 154, 0.08), transparent 25%);
    filter: blur(60px);
}

.app-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
    display: flex;
    gap: 2rem;
    height: 100vh;
}

/* Sidebar Layout */
.sidebar {
    width: 250px;
    display: flex;
    flex-direction: column;
    gap: 3rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo h1 {
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: -0.5px;
    background: linear-gradient(to right, #fff, #a0aabf);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.spark-icon {
    filter: drop-shadow(0 0 8px rgba(255, 215, 0, 0.4));
    animation: pulse 2s infinite ease-in-out;
}

@keyframes pulse {
    0%, 100% { filter: drop-shadow(0 0 8px rgba(255, 215, 0, 0.4)); transform: scale(1); }
    50% { filter: drop-shadow(0 0 15px rgba(255, 215, 0, 0.7)); transform: scale(1.05); }
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.nav-btn {
    display: flex;
    align-items: center;
    gap: 1rem;
    background: transparent;
    border: 1px solid transparent;
    color: var(--text-secondary);
    padding: 1rem 1.25rem;
    border-radius: 12px;
    font-family: inherit;
    font-size: 1.05rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: left;
}

.nav-btn:hover {
    background: rgba(255, 255, 255, 0.03);
    color: var(--text-primary);
}

.nav-btn.active {
    background: var(--bg-panel);
    border-color: var(--border-color);
    color: var(--text-primary);
    box-shadow: var(--shadow-sm);
}

/* Main Content Area */
.main-content {
    flex: 1;
    background: var(--bg-panel);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 2rem;
    box-shadow: var(--shadow-md);
    backdrop-filter: blur(12px);
    display: flex;
    flex-direction: column;
}

/* Views toggling */
.dashboard-view {
    display: none;
    flex-direction: column;
    height: 100%;
}

.dashboard-view.active-view {
    display: flex;
}

.hidden-view {
    display: none !important;
}

/* Dashboard Headers */
.column-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

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

.header-title h2 {
    font-size: 1.8rem;
    font-weight: 600;
}

.gradient-work {
    background: var(--work-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.gradient-home {
    background: var(--home-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.task-count {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    font-size: 0.95rem;
    font-weight: 600;
    padding: 0.35rem 1rem;
    border-radius: 12px;
}

/* Task List */
.task-list {
    flex: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 1.5rem;
    padding-right: 0.5rem;
}

.task-list::-webkit-scrollbar { width: 6px; }
.task-list::-webkit-scrollbar-track { background: transparent; }
.task-list::-webkit-scrollbar-thumb { background: rgba(255, 255, 255, 0.1); border-radius: 10px; }
.task-list::-webkit-scrollbar-thumb:hover { background: rgba(255, 255, 255, 0.2); }

/* Task Item Elements */
.task-item {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.25rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: all 0.2s ease;
    animation: slideIn 0.3s ease backwards;
}

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

.task-item:hover {
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(255, 255, 255, 0.15);
}

.task-checkbox {
    appearance: none;
    width: 24px;
    height: 24px;
    border: 2px solid var(--text-secondary);
    border-radius: 6px;
    cursor: pointer;
    position: relative;
    transition: all 0.2s ease;
    flex-shrink: 0;
}

#work-column .task-checkbox:checked { background: var(--work-gradient); border-color: transparent; }
#home-column .task-checkbox:checked { background: var(--home-gradient); border-color: transparent; }

.task-checkbox:checked::after {
    content: '';
    position: absolute;
    top: 4px;
    left: 8px;
    width: 4px;
    height: 10px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.task-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.task-main-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
}

.task-title {
    font-size: 1.1rem;
    color: var(--text-primary);
    font-weight: 500;
}

.task-item.completed .task-title {
    color: var(--text-secondary);
    text-decoration: line-through;
    opacity: 0.7;
}

/* Badges & Meta Info */
.task-meta {
    display: flex;
    gap: 0.75rem;
    align-items: center;
}

.priority-badge {
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.2rem 0.6rem;
    border-radius: 12px;
    text-transform: uppercase;
}
.priority-high { color: var(--priority-high); background: rgba(255, 71, 87, 0.1); border: 1px solid rgba(255, 71, 87, 0.3); }
.priority-medium { color: var(--priority-medium); background: rgba(255, 165, 2, 0.1); border: 1px solid rgba(255, 165, 2, 0.3); }
.priority-low { color: var(--priority-low); background: rgba(46, 213, 115, 0.1); border: 1px solid rgba(46, 213, 115, 0.3); }

.due-date-badge {
    font-size: 0.8rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.delete-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    opacity: 0;
    transition: all 0.2s ease;
    padding: 0.5rem;
    border-radius: 8px;
}
.task-item:hover .delete-btn { opacity: 1; }
.delete-btn:hover { color: #ff4757; background: rgba(255, 71, 87, 0.1); }

/* Add Task Form */
.add-task-form {
    display: flex;
    gap: 0.75rem;
    margin-top: auto;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 0.75rem;
}

.add-task-form input, .add-task-form select {
    background: transparent;
    border: 1px solid transparent;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.95rem;
    transition: all 0.2s ease;
    outline: none;
    padding: 0.5rem;
}

.task-input { flex: 1; }
.task-date { width: 140px; color: var(--text-secondary); }
.task-priority { width: 100px; color: var(--text-secondary); cursor: pointer; }

/* Override styling for select options to make them readable in dark mode */
.task-priority option {
    background: var(--bg-dark);
    color: var(--text-primary);
}

.add-task-form input:focus, .add-task-form select:focus {
    border-bottom: 1px solid rgba(255,255,255,0.2);
}

.add-task-form button {
    background: var(--bg-panel);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: 12px;
    width: 46px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
}

#work-column .add-task-form button:hover { background: var(--work-gradient); border-color: transparent; }
#home-column .add-task-form button:hover { background: var(--home-gradient); border-color: transparent; }

/* Responsive */
@media (max-width: 900px) {
    .app-container {
        flex-direction: column;
        height: auto;
    }
    .sidebar {
        width: 100%;
        gap: 1.5rem;
    }
    .sidebar-nav {
        flex-direction: row;
    }
    .main-content {
        height: 600px;
    }
}