:root {
    --primary: #2A7FFF;
    --secondary: #7B8A9A;
    --success: #22A06B;
    --warning: #FFA11F;
    --danger: #FF4D4F;
    --info: #3C8DBC;
    --surface: #FFFFFF;
    --surface-alt: #F6F8FB;
    --text-primary: #0F141A;
    --text-secondary: #475466;
    --border: #E4E8EE;
    --disabled: #A6B1BB;
    --importance-low: #8A949E;
    --importance-normal: #2A7FFF;
    --importance-high: #FFA11F;
    --importance-critical: #FF4D4F;
    --radius: 12px;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-hover: 0 4px 12px rgba(0, 0, 0, 0.12);
}

[data-theme="dark"] {
    --primary: #5A9BFF;
    --secondary: #9AA4AE;
    --success: #3AC188;
    --warning: #FFB44D;
    --danger: #FF6A6B;
    --info: #66A7D1;
    --surface: #0F1216;
    --surface-alt: #151A21;
    --text-primary: #E9EEF5;
    --text-secondary: #B6BECB;
    --border: #2A333D;
    --disabled: #6E7885;
    --importance-low: #9AA4AE;
    --importance-normal: #5A9BFF;
    --importance-high: #FFB44D;
    --importance-critical: #FF6A6B;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-hover: 0 4px 12px rgba(0, 0, 0, 0.4);
}

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

body {
    font-family: 'Inter', 'Noto Sans', sans-serif;
    background-color: var(--surface);
    color: var(--text-primary);
    line-height: 1.5;
    padding-bottom: 80px;
}

h1, h2, h3, h4, h5 {
    font-family: 'Poppins', 'Montserrat', sans-serif;
    font-weight: 600;
}

.container {
    max-width: 100%;
    padding: 0 16px;
}

.app-bar {
    position: sticky;
    top: 0;
    background-color: var(--surface);
    padding: 16px;
    border-bottom: 1px solid var(--border);
    z-index: 100;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

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

.app-title {
    font-size: 1.25rem;
    font-weight: 600;
}

.app-actions {
    display: flex;
    gap: 16px;
}

.icon-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.25rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius);
    transition: background-color 0.2s;
}

.icon-btn:hover {
    background-color: var(--surface-alt);
}

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

.greeting {
    font-size: 1.5rem;
    margin-bottom: 4px;
}

.date {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.section {
    margin: 24px 0;
}

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

.section-title {
    font-size: 1.125rem;
    font-weight: 600;
}

.view-all {
    color: var(--primary);
    font-size: 0.875rem;
    text-decoration: none;
    font-weight: 500;
}

.overview-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
}

.overview-card {
    background-color: var(--surface-alt);
    border-radius: var(--radius);
    padding: 16px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: transform 0.2s, box-shadow 0.2s;
}

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

.overview-icon {
    font-size: 1.5rem;
    margin-bottom: 8px;
}

.overview-count {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.overview-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.quick-actions {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
}

.action-btn {
    background-color: var(--surface-alt);
    border: none;
    border-radius: var(--radius);
    padding: 16px 8px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    transition: background-color 0.2s, transform 0.2s;
    box-shadow: var(--shadow);
}

.action-btn:hover {
    background-color: var(--border);
    transform: translateY(-2px);
}

.action-icon {
    font-size: 1.5rem;
    color: var(--primary);
}

.action-label {
    font-size: 0.75rem;
    color: var(--text-primary);
    text-align: center;
}

.task-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.task-item {
    background-color: var(--surface-alt);
    border-radius: var(--radius);
    padding: 16px;
    display: flex;
    align-items: center;
    gap: 12px;
    box-shadow: var(--shadow);
}

.task-checkbox {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    border: 2px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    flex-shrink: 0;
}

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

.task-content {
    flex: 1;
}

.task-title {
    font-weight: 500;
    margin-bottom: 4px;
}

.task-meta {
    display: flex;
    gap: 12px;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.task-importance {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
    align-self: center;
}

.importance-low { background-color: var(--importance-low); }
.importance-normal { background-color: var(--importance-normal); }
.importance-high { background-color: var(--importance-high); }
.importance-critical { background-color: var(--importance-critical); }

.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.stat-card {
    background-color: var(--surface-alt);
    border-radius: var(--radius);
    padding: 16px;
    box-shadow: var(--shadow);
}

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

.stat-title {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.stat-value {
    font-size: 1.25rem;
    font-weight: 600;
}

.progress-bar {
    height: 6px;
    background-color: var(--border);
    border-radius: 3px;
    overflow: hidden;
    margin-top: 8px;
}

.progress-fill {
    height: 100%;
    border-radius: 3px;
}

.progress-success { background-color: var(--success); }
.progress-warning { background-color: var(--warning); }
.progress-danger { background-color: var(--danger); }

.alert-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.alert-item {
    background-color: var(--surface-alt);
    border-radius: var(--radius);
    padding: 16px;
    display: flex;
    align-items: flex-start;
    gap: 12px;
    box-shadow: var(--shadow);
}

.alert-icon {
    font-size: 1.25rem;
    flex-shrink: 0;
    margin-top: 2px;
}

.alert-warning { color: var(--warning); }
.alert-danger { color: var(--danger); }
.alert-info { color: var(--info); }

.alert-content {
    flex: 1;
}

.alert-title {
    font-weight: 500;
    margin-bottom: 4px;
}

.alert-desc {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: var(--surface);
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: space-around;
    padding: 12px 0;
    z-index: 100;
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 0.75rem;
    flex: 1;
}

.nav-item.active {
    color: var(--primary);
}

.nav-icon {
    font-size: 1.25rem;
}

@media (min-width: 768px) {
    .container {
        max-width: 720px;
        margin: 0 auto;
    }
    
    .overview-grid {
        grid-template-columns: repeat(6, 1fr);
    }
    
    .quick-actions {
        grid-template-columns: repeat(7, 1fr);
    }
    
    .stats-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}