.checkin-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 12px;
}
.checkin-title h2 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}
.checkin-title p {
    font-size: 13px;
    color: var(--text-tertiary);
    margin: 4px 0 0;
}
.checkin-actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}
.checkin-summary {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
    margin-bottom: 20px;
}
.checkin-summary-card {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 16px 18px;
}
.checkin-summary-label {
    font-size: 12px;
    color: var(--text-tertiary);
    margin-bottom: 8px;
}
.checkin-summary-value {
    font-size: 24px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}
.checkin-summary-note {
    font-size: 12px;
    color: var(--text-secondary);
}
.checkin-board {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 8px;
    margin-bottom: 16px;
    overflow-x: auto;
    min-width: 0;
}
.checkin-day {
    min-width: 120px;
    background: var(--bg-elevated);
    border-radius: 10px;
    border: 1px solid var(--border);
    padding: 14px 12px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.checkin-day.is-today {
    border-color: rgba(94,92,230,0.28);
    background: rgba(94,92,230,0.04);
}
.checkin-day-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 12px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 2px;
}
.checkin-day-title {
    min-width: 0;
}
.checkin-day-header .dow {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
}
.checkin-day-header .date {
    font-size: 12px;
    color: var(--text-tertiary);
    margin-top: 2px;
}
.checkin-day-stats {
    flex-shrink: 0;
    font-size: 11px;
    color: var(--text-secondary);
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 3px 8px;
}
.checkin-section-label {
    font-size: 11px;
    font-weight: 600;
    color: var(--accent, #3b82f6);
    margin: 10px 0 6px;
    padding-left: 2px;
}
.checkin-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 10px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 13px;
    color: var(--text-primary);
    border: 1px solid transparent;
    transition: all 0.15s;
    user-select: none;
    background: var(--bg);
}
.checkin-item:hover {
    background: var(--bg-hover);
    border-color: var(--border);
}
.checkin-item.checked {
    color: var(--text-tertiary);
    background: rgba(0,0,0,0.02);
}
.checkin-item .item-time {
    flex-shrink: 0;
    font-size: 11px;
    color: var(--text-tertiary);
    min-width: 40px;
    font-family: monospace;
}
.checkin-item .icon {
    flex-shrink: 0;
    font-size: 14px;
    width: 18px;
    text-align: center;
}
.checkin-item .check-box {
    width: 16px;
    height: 16px;
    border-radius: 4px;
    border: 1.5px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: all 0.15s;
}
.checkin-item.checked .check-box {
    background: var(--accent, #3b82f6);
    border-color: var(--accent, #3b82f6);
}
.checkin-item .item-name {
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.checkin-item .item-main {
    flex: 1;
    min-width: 0;
    display: flex;
    align-items: center;
    gap: 8px;
}
.checkin-item .item-type-tag {
    flex-shrink: 0;
    font-size: 11px;
    color: var(--text-secondary);
    background: var(--bg-hover);
    border-radius: 999px;
    padding: 2px 8px;
}
.checkin-item.is-task .task-icon {
    color: var(--accent, #3b82f6);
    font-size: 18px;
    line-height: 1;
}
.checkin-empty {
    text-align: center;
    padding: 12px 8px;
    font-size: 12px;
    color: var(--text-tertiary);
    background: var(--bg);
    border: 1px dashed var(--border);
    border-radius: 8px;
}
.progress-bar {
    flex: 1;
    height: 8px;
    background: var(--border);
    border-radius: 4px;
    overflow: hidden;
}
.progress-bar .progress-fill {
    height: 100%;
    background: var(--accent, #5e5ce6);
    border-radius: 4px;
    transition: width 0.3s;
}
.period-picker {
    display: flex;
    gap: 8px;
}
.period-btn {
    flex: 1;
    padding: 8px 12px;
    border-radius: 6px;
    border: 1.5px solid var(--border);
    background: var(--bg);
    cursor: pointer;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    text-align: center;
    transition: all 0.15s;
}
.period-btn:hover {
    border-color: var(--accent, #3b82f6);
}
.period-btn.active {
    background: var(--accent, #3b82f6);
    border-color: var(--accent, #3b82f6);
    color: #fff;
}
.repeat-day-picker {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}
.repeat-day-btn {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 1.5px solid var(--border);
    background: var(--bg);
    cursor: pointer;
    font-size: 12px;
    font-weight: 500;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s;
}
.repeat-day-btn:hover {
    border-color: var(--accent, #3b82f6);
}
.repeat-day-btn.active {
    background: var(--accent, #3b82f6);
    border-color: var(--accent, #3b82f6);
    color: #fff;
}
.checkin-day .add-task-btn {
    font-size: 12px;
    color: var(--text-secondary);
    cursor: pointer;
    text-align: center;
    padding: 8px;
    border-radius: 6px;
    border: 1px dashed var(--border);
    background: var(--bg);
    margin-top: 2px;
}
.checkin-day .add-task-btn:hover {
    color: var(--text-primary);
    border-color: var(--border-hover);
    background: var(--bg-hover);
}
/* Checkin Stats Page */
.cs-tabs {
    display: flex;
    gap: 4px;
    margin-bottom: 20px;
    background: var(--bg-elevated);
    border-radius: 8px;
    padding: 4px;
    border: 1px solid var(--border);
}
.cs-tab {
    flex: 1;
    padding: 8px 16px;
    border: none;
    background: none;
    border-radius: 6px;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.15s;
}
.cs-tab:hover { background: var(--bg-hover); }
.cs-tab.active {
    background: var(--accent, #3b82f6);
    color: #fff;
}
.cs-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 12px;
    margin-bottom: 20px;
}
.cs-card {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 16px 20px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.cs-card-label {
    font-size: 12px;
    color: var(--text-tertiary);
    letter-spacing: 0.3px;
}
.cs-card-value {
    font-size: 24px;
    font-weight: 600;
    color: var(--text-primary);
}
.cs-month-nav {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}
.cs-month-label {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
}
.cs-heatmap {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 6px;
    margin-top: 16px;
}
.cs-heat-cell {
    aspect-ratio: 1;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    color: var(--text-tertiary);
    border: 1px solid var(--border);
    background: var(--bg-elevated);
}
.cs-heat-cell.level-1 { background: rgba(59,130,246,0.15); }
.cs-heat-cell.level-2 { background: rgba(59,130,246,0.35); color: #fff; }
.cs-heat-cell.level-3 { background: var(--accent, #3b82f6); color: #fff; }
.cs-heat-day { font-weight: 500; }
.cs-habit-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.cs-habit-card {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 16px 20px;
}
.cs-habit-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
}
.cs-habit-icon { font-size: 18px; }
.cs-habit-name {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
}
.cs-habit-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
    margin-bottom: 12px;
}
.cs-habit-stat { text-align: center; }
.cs-hs-label {
    display: block;
    font-size: 11px;
    color: var(--text-tertiary);
    margin-bottom: 4px;
}
.cs-hs-value {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
}
@media (max-width: 768px) {
    .checkin-summary {
        grid-template-columns: 1fr;
        gap: 10px;
    }
    .checkin-header {
        flex-direction: column;
        align-items: stretch;
    }
    .checkin-title {
        text-align: center;
        margin-bottom: 12px;
    }
    .checkin-title h2 {
        font-size: 16px;
    }
    .checkin-actions {
        display: grid;
        grid-template-columns: repeat(5, 1fr);
        gap: 6px;
    }
    .checkin-actions .topbar-btn {
        padding: 8px 4px;
        font-size: 12px;
    }
    .checkin-board {
        display: flex;
        flex-direction: column;
        gap: 12px;
        overflow-x: visible;
    }
    .checkin-day {
        min-width: 100%;
        padding: 14px 12px;
    }
    .checkin-day.is-today {
        border-top: 1px solid rgba(94,92,230,0.28);
    }
    .checkin-day-header {
        padding-bottom: 10px;
        margin-bottom: 8px;
    }
    .checkin-day-header .dow {
        font-size: 14px;
    }
    .checkin-day-header .date {
        font-size: 12px;
        margin-top: 0;
    }
    .checkin-item {
        padding: 10px;
        font-size: 14px;
        gap: 10px;
    }
    .checkin-item .check-box {
        width: 22px;
        height: 22px;
    }
    .checkin-item .icon {
        font-size: 16px;
    }
    .checkin-section-label {
        font-size: 11px;
        margin: 10px 0 6px;
    }
    .checkin-day .add-task-btn {
        padding: 10px;
        font-size: 13px;
        margin-top: 8px;
    }
    .cs-habit-stats { grid-template-columns: repeat(2, 1fr); }
    .cs-heatmap { gap: 4px; }
    .cs-tabs {
        flex-direction: column;
    }
    .cs-tab {
        border-bottom: 1px solid var(--border);
        border-radius: 0;
    }
    .cs-tab:last-child {
        border-bottom: none;
    }
    .repeat-day-btn {
        width: 40px;
        height: 40px;
    }
}

@media (max-width: 480px) {
    .checkin-header {
        margin-bottom: 14px;
        gap: 8px;
    }
    .checkin-title h2 {
        font-size: 15px;
    }
    .checkin-title p {
        font-size: 12px;
    }
    .checkin-actions {
        grid-template-columns: repeat(2, 1fr);
        gap: 8px;
    }
    .checkin-actions .topbar-btn {
        min-height: 40px;
        font-size: 12px;
    }
    .checkin-day {
        padding: 12px 10px;
        border-radius: 8px;
    }
    .checkin-summary-card {
        padding: 12px 14px;
    }
    .checkin-summary-value {
        font-size: 20px;
    }
    .checkin-day-header .dow {
        font-size: 13px;
    }
    .checkin-item {
        padding: 8px;
        font-size: 13px;
        gap: 8px;
    }
    .checkin-item .item-time {
        font-size: 10px;
        min-width: 36px;
    }
    .checkin-item .check-box {
        width: 20px;
        height: 20px;
    }
    .cs-cards {
        grid-template-columns: 1fr 1fr;
        gap: 8px;
    }
    .cs-card {
        padding: 12px;
    }
    .cs-card-value {
        font-size: 20px;
    }
}