/* ===== Base Styles ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #4a90e2;
    --primary-dark: #357abd;
    --secondary-color: #7b68ee;
    --success-color: #52c41a;
    --danger-color: #ff4d4f;
    --warning-color: #faad14;
    --bg-color: #0a0e27;
    --bg-secondary: #141b2d;
    --bg-tertiary: #1e2742;
    --text-primary: #ffffff;
    --text-secondary: #a0aec0;
    --border-color: #2d3748;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.5);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
    background: linear-gradient(135deg, var(--bg-color) 0%, var(--bg-secondary) 100%);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* ===== Header ===== */
header {
    margin-bottom: 30px;
}

.header-top {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 15px;
    margin-bottom: 10px;
    position: relative;
}

.back-home {
    position: absolute;
    left: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    background: var(--bg-tertiary);
    border-radius: 8px;
    transition: all 0.3s ease;
    text-decoration: none;
    border: 1px solid var(--border-color);
}

.back-home:hover {
    color: var(--primary-color);
    background: var(--bg-secondary);
    transform: translateX(-2px);
    border-color: var(--primary-color);
}

.back-home svg {
    width: 20px;
    height: 20px;
}

h1 {
    font-size: 2rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin: 0;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 0.95rem;
    text-align: center;
}

.header-actions {
    position: absolute;
    right: 0;
    display: flex;
    align-items: center;
    gap: 10px;
}

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

/* ===== Buttons ===== */
.btn-icon, .btn-icon-small {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 8px;
    border-radius: 6px;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.btn-icon {
    width: 36px;
    height: 36px;
}

.btn-icon-small {
    width: 28px;
    height: 28px;
    padding: 4px;
}

.btn-icon:hover, .btn-icon-small:hover {
    background: var(--bg-secondary);
    border-color: var(--primary-color);
    transform: translateY(-2px);
}

.btn-icon svg, .btn-icon-small svg {
    width: 18px;
    height: 18px;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 10px 20px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.btn-secondary:hover {
    background: var(--bg-secondary);
    border-color: var(--primary-color);
}

.btn-small {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 8px 16px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

.btn-small:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.language-select {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 6px 12px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.9rem;
}

/* ===== Tabs ===== */
.tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 30px;
    border-bottom: 2px solid var(--border-color);
}

.tab-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    padding: 12px 24px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    position: relative;
    transition: color 0.3s ease;
}

.tab-btn:hover {
    color: var(--text-primary);
}

.tab-btn.active {
    color: var(--primary-color);
}

.tab-btn.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--primary-color);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* ===== Date Selector ===== */
.date-selector {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 30px;
    flex-wrap: wrap;
}

.date-input-wrapper {
    position: relative;
    flex: 1;
    min-width: 150px;
}

.date-input {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 1rem;
    width: 100%;
}

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

/* ===== Date Picker Heatmap ===== */
.date-picker-heatmap {
    display: none;
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    z-index: 100;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
    box-shadow: var(--shadow-lg);
    min-width: 320px;
}

.heatmap-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 15px;
}

.heatmap-title {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 1.1rem;
}

.heatmap-nav {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    width: 32px;
    height: 32px;
    border-radius: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    transition: all 0.3s ease;
}

.heatmap-nav:hover {
    background: var(--bg-color);
    border-color: var(--primary-color);
}

.heatmap-calendar {
    margin-bottom: 15px;
}

.heatmap-weekdays {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 4px;
    margin-bottom: 8px;
}

.heatmap-weekday {
    text-align: center;
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.heatmap-days {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 4px;
}

.heatmap-day {
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.2s ease;
    border: 1px solid transparent;
}

.heatmap-day:not(.heatmap-day-empty):hover {
    transform: scale(1.1);
    border-color: var(--primary-color);
}

.heatmap-day-empty {
    cursor: default;
}

/* Heatmap levels - Purple gradient */
.heatmap-level-0 {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
}

.heatmap-level-1 {
    background: #3d1f5c;
    color: #c4a7e7;
}

.heatmap-level-2 {
    background: #5b2d8f;
    color: #d4b5ff;
}

.heatmap-level-3 {
    background: #7b4bb8;
    color: white;
}

.heatmap-level-4 {
    background: #9d6fd8;
    color: white;
    font-weight: 600;
}

.heatmap-today {
    border: 2px solid var(--warning-color) !important;
}

.heatmap-selected {
    border: 2px solid var(--secondary-color) !important;
    font-weight: bold;
}

.heatmap-legend {
    display: flex;
    align-items: center;
    gap: 4px;
    justify-content: flex-end;
    padding-top: 10px;
    border-top: 1px solid var(--border-color);
}

.heatmap-legend-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.heatmap-legend-item {
    width: 12px;
    height: 12px;
    border-radius: 2px;
}

.date-range-selector {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

/* ===== Record Form ===== */
.record-form {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 25px;
    margin-bottom: 30px;
    box-shadow: var(--shadow);
}

.record-form h3 {
    margin-bottom: 20px;
    color: var(--text-primary);
    font-size: 1.3rem;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
}

.input, .select {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 10px 12px;
    border-radius: 6px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

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

.form-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.input-with-dropdown {
    position: relative;
}

.task-dropdown {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    z-index: 100;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    margin-top: 4px;
    box-shadow: var(--shadow-lg);
    max-height: 200px;
    overflow-y: auto;
}

.task-dropdown-item {
    padding: 10px 12px;
    cursor: pointer;
    transition: background 0.2s ease;
    color: var(--text-primary);
}

.task-dropdown-item:hover {
    background: var(--bg-secondary);
    color: var(--primary-color);
}

.task-dropdown-item:first-child {
    border-radius: 6px 6px 0 0;
}

.task-dropdown-item:last-child {
    border-radius: 0 0 6px 6px;
}

.group-selector {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 20px;
}

.period-selector {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

.period-btn {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 8px 16px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.95rem;
    transition: all 0.3s ease;
}

.period-btn:hover {
    color: var(--text-primary);
    border-color: var(--primary-color);
}

.period-btn.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* ===== Records List ===== */
.records-list {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 25px;
    box-shadow: var(--shadow);
}

.records-list h3 {
    margin-bottom: 20px;
    color: var(--text-primary);
    font-size: 1.3rem;
}

.records-container {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.record-item {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 15px;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 15px;
    transition: all 0.3s ease;
}

.record-item:hover {
    border-color: var(--primary-color);
    transform: translateX(5px);
}

.record-main {
    flex: 1;
}

.record-task {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.record-meta {
    display: flex;
    gap: 8px;
    margin-bottom: 8px;
    flex-wrap: wrap;
}

.record-tag {
    background: var(--bg-color);
    color: var(--text-secondary);
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 0.85rem;
}

.record-time {
    color: var(--text-secondary);
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.record-duration {
    color: var(--primary-color);
    font-weight: 500;
}

/* ===== Ongoing Records ===== */
.record-ongoing {
    border-left: 3px solid var(--success-color);
    animation: pulse 2s ease-in-out infinite;
}

.record-ongoing-badge {
    display: inline-block;
    background: var(--success-color);
    color: white;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
    margin-left: 8px;
    animation: pulse-badge 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        border-left-color: var(--success-color);
    }
    50% {
        border-left-color: rgba(82, 196, 26, 0.5);
    }
}

@keyframes pulse-badge {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.7;
    }
}

.btn-complete {
    background: var(--success-color);
    border-color: var(--success-color);
}

.btn-complete:hover {
    background: #45a836;
    transform: translateY(-2px);
}

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

.empty-message {
    text-align: center;
    color: var(--text-secondary);
    padding: 40px;
    font-size: 1.1rem;
}

/* ===== Statistics ===== */
.statistics-section {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 25px;
    box-shadow: var(--shadow);
}

.statistics-display {
    margin-top: 20px;
}

.chart-container {
    margin-bottom: 30px;
}

.chart-item {
    margin-bottom: 20px;
}

.chart-label {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.chart-name {
    font-weight: 500;
    color: var(--text-primary);
}

.chart-percentage {
    color: var(--primary-color);
    font-weight: 600;
}

.chart-bar {
    background: var(--bg-tertiary);
    height: 24px;
    border-radius: 12px;
    overflow: hidden;
    margin-bottom: 5px;
}

.chart-fill {
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    height: 100%;
    border-radius: 12px;
    transition: width 0.5s ease;
}

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

.statistics-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.stat-item {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 15px;
    display: flex;
    align-items: center;
    gap: 15px;
    transition: all 0.3s ease;
}

.stat-item:hover {
    border-color: var(--primary-color);
    transform: translateX(5px);
}

.stat-rank {
    background: var(--primary-color);
    color: white;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    flex-shrink: 0;
}

.stat-content {
    flex: 1;
}

.stat-name {
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 5px;
}

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

/* ===== Footer ===== */
footer {
    margin-top: 40px;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
    padding: 20px;
}

/* ===== Modal ===== */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 25px;
    max-width: 600px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.modal-header h3 {
    color: var(--text-primary);
    font-size: 1.3rem;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 2rem;
    cursor: pointer;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all 0.3s ease;
}

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

/* ===== Timeline ===== */
.timeline-section, .insights-section {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 25px;
    box-shadow: var(--shadow);
}

.timeline-date-selector, .insights-date-selector {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 30px;
    flex-wrap: wrap;
}

.timeline-grid {
    display: flex;
    flex-direction: column;
    gap: 2px;
    margin-bottom: 30px;
}

.timeline-hour {
    display: flex;
    align-items: stretch;
    min-height: 40px;
    border-bottom: 1px solid var(--border-color);
}

.timeline-hour:last-child {
    border-bottom: none;
}

.timeline-hour-label {
    width: 60px;
    flex-shrink: 0;
    color: var(--text-secondary);
    font-size: 0.85rem;
    padding: 8px 10px;
    text-align: right;
}

.timeline-hour-content {
    flex: 1;
    position: relative;
    background: var(--bg-tertiary);
    border-radius: 4px;
    min-height: 40px;
}

.timeline-block {
    position: absolute;
    top: 2px;
    bottom: 2px;
    border-radius: 3px;
    padding: 4px 8px;
    font-size: 0.85rem;
    color: white;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    cursor: pointer;
    transition: all 0.2s ease;
}

.timeline-block:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
    z-index: 10;
}

.timeline-block-text {
    font-weight: 500;
}

/* Category colors */
.category-primary {
    background: linear-gradient(135deg, #667eea, #764ba2);
}

.category-secondary {
    background: linear-gradient(135deg, #f093fb, #f5576c);
}

.category-life {
    background: linear-gradient(135deg, #4facfe, #00f2fe);
}

.category-other {
    background: linear-gradient(135deg, #43e97b, #38f9d7);
}

.timeline-summary {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 20px;
}

.timeline-summary-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 20px;
}

.summary-item {
    text-align: center;
}

.summary-label {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 8px;
}

.summary-value {
    color: var(--primary-color);
    font-size: 1.5rem;
    font-weight: 600;
}

/* ===== Insights ===== */
.insights-card {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 20px;
}

.insights-card h3 {
    color: var(--text-primary);
    font-size: 1.2rem;
    margin-bottom: 20px;
}

.insights-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 20px;
}

.insight-stat-large {
    grid-column: span 2;
    text-align: center;
    padding: 20px;
    background: var(--bg-secondary);
    border-radius: 8px;
}

.insight-stat {
    text-align: center;
    padding: 15px;
    background: var(--bg-secondary);
    border-radius: 8px;
}

.insight-stat-value {
    color: var(--primary-color);
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 8px;
}

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

.insight-stat-sub {
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-top: 4px;
}

.insight-ongoing {
    color: var(--success-color);
}

.insight-category-item {
    margin-bottom: 20px;
}

.insight-category-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.insight-category-name {
    font-weight: 600;
    padding: 4px 12px;
    border-radius: 12px;
    color: white;
}

.insight-category-percentage {
    color: var(--primary-color);
    font-weight: 600;
    font-size: 1.1rem;
}

.insight-category-bar {
    background: var(--bg-secondary);
    height: 24px;
    border-radius: 12px;
    overflow: hidden;
    margin-bottom: 5px;
}

.insight-category-fill {
    height: 100%;
    border-radius: 12px;
    transition: width 0.5s ease;
}

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

.comparison-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.comparison-item {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 20px;
}

.comparison-label {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 10px;
}

.comparison-values {
    margin-bottom: 10px;
}

.comparison-current {
    color: var(--text-primary);
    font-size: 1.8rem;
    font-weight: 700;
}

.comparison-change {
    font-size: 1rem;
    font-weight: 600;
    margin-top: 8px;
}

.comparison-increased {
    color: var(--success-color);
}

.comparison-decreased {
    color: var(--danger-color);
}

.comparison-no-change {
    color: var(--text-secondary);
}

.comparison-previous {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

/* ===== Responsive Design ===== */
@media (max-width: 768px) {
    .container {
        padding: 15px;
    }
    
    h1 {
        font-size: 1.5rem;
    }
    
    .header-top {
        flex-wrap: wrap;
    }
    
    .back-home {
        position: static;
        order: -1;
    }
    
    .header-actions {
        position: static;
        width: 100%;
        justify-content: center;
        order: 2;
        margin-top: 10px;
    }
    
    .form-grid {
        grid-template-columns: 1fr;
    }
    
    .date-selector {
        flex-direction: column;
        align-items: stretch;
    }
    
    .date-input {
        width: 100%;
    }
    
    .record-item {
        flex-direction: column;
    }
    
    .record-actions {
        align-self: flex-end;
    }
    
    .chart-label {
        flex-direction: column;
        align-items: flex-start;
        gap: 5px;
    }
    
    .modal-content {
        width: 95%;
        padding: 20px;
    }
}

@media (max-width: 480px) {
    .tabs {
        flex-direction: column;
    }
    
    .tab-btn {
        width: 100%;
        text-align: center;
    }
    
    .period-selector {
        flex-wrap: wrap;
    }
    
    .period-btn {
        flex: 1;
        min-width: calc(33.333% - 7px);
    }
}

/* ===== Sync Styles ===== */
.sync-section {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
}

.sync-section h2 {
    margin-bottom: 30px;
    color: var(--primary-color);
    text-align: center;
}

.sync-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 24px;
    box-shadow: var(--shadow);
}

.sync-card h3 {
    margin: 0 0 20px 0;
    color: var(--text-primary);
    font-size: 1.1em;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 10px;
}

.sync-info {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.info-row {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.info-row label {
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 0.9em;
}

.info-value-row {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.user-id-display,
.verify-code-display {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    padding: 10px 16px;
    border-radius: 6px;
    font-family: 'Courier New', monospace;
    font-size: 0.95em;
    color: var(--primary-color);
    letter-spacing: 0.5px;
    word-break: break-all;
}

.verify-code-display {
    font-size: 1.1em;
    font-weight: 600;
}

.btn-secondary-small {
    padding: 6px 12px;
    font-size: 0.85em;
    border: 1px solid var(--border-color);
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-secondary-small:hover {
    background: var(--bg-color);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.sync-tip {
    background: var(--bg-tertiary);
    border-left: 4px solid var(--primary-color);
    padding: 12px 16px;
    margin-bottom: 20px;
    border-radius: 4px;
    color: var(--text-secondary);
    font-size: 0.9em;
}

.sync-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 0.9em;
}

.form-input {
    padding: 10px 14px;
    border: 1px solid var(--border-color);
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border-radius: 8px;
    font-size: 1em;
    transition: border-color 0.2s;
}

.form-input:focus {
    outline: none;
    border-color: var(--primary-color);
    background: var(--bg-color);
}

.form-input::placeholder {
    color: var(--text-secondary);
    opacity: 0.5;
}

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

.no-data {
    text-align: center;
    color: var(--text-secondary);
    padding: 20px;
    font-style: italic;
}

.bound-device-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    background: var(--bg-tertiary);
    border-radius: 8px;
    border: 1px solid var(--border-color);
    transition: all 0.2s;
}

.bound-device-item:hover {
    border-color: var(--primary-color);
}

.bound-device-id {
    font-family: 'Courier New', monospace;
    color: var(--primary-color);
    font-size: 0.95em;
}

.btn-danger-small {
    padding: 6px 12px;
    font-size: 0.85em;
    border: 1px solid var(--danger-color);
    background: var(--bg-tertiary);
    color: var(--danger-color);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-danger-small:hover {
    background: var(--danger-color);
    color: white;
}

.sync-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.sync-actions button {
    flex: 1;
    min-width: 150px;
}

.sync-status {
    margin-top: 16px;
    padding: 12px 16px;
    border-radius: 6px;
    text-align: center;
    font-weight: 500;
    transition: opacity 0.3s;
}

.sync-status-success {
    background: rgba(40, 167, 69, 0.15);
    color: var(--success-color);
    border: 1px solid var(--success-color);
}

.sync-status-error {
    background: rgba(220, 53, 69, 0.15);
    color: var(--danger-color);
    border: 1px solid var(--danger-color);
}

.sync-status-info {
    background: rgba(74, 144, 226, 0.15);
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
}

@media (max-width: 768px) {
    .sync-section {
        padding: 12px;
    }
    
    .sync-card {
        padding: 16px;
    }
    
    .sync-actions {
        flex-direction: column;
    }
    
    .sync-actions button {
        min-width: 100%;
    }
    
    .info-value-row {
        flex-direction: column;
        align-items: stretch;
    }
}