:root {
    --gap: 1rem;
}

body {
    min-height: 100vh;
}

.muted {
    color: var(--pico-muted-color);
    margin-right: 0.5rem;
}

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

.tab {
    text-decoration: none;
}
.tab.active {
    color: var(--pico-primary);
    border-bottom: 2px solid var(--pico-primary);
}

.grid-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--gap);
}

.album-card {
    padding: 1rem;
    border: 1px solid var(--pico-muted-border-color);
    border-radius: 0.5rem;
    cursor: pointer;
    transition: transform 0.1s, box-shadow 0.1s;
    background: var(--pico-card-background-color);
}
.album-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}
.album-card h4 {
    margin: 0 0 0.25rem 0;
}

.grid-photos {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 0.75rem;
}

.photo-card {
    aspect-ratio: 1 / 1;
    border-radius: 0.4rem;
    overflow: hidden;
    cursor: pointer;
    background: var(--pico-secondary-background);
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}
.photo-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.photo-card .status-badge {
    position: absolute;
    top: 0.3rem;
    right: 0.3rem;
    font-size: 0.7rem;
    padding: 0.1rem 0.4rem;
    border-radius: 0.2rem;
    background: rgba(0, 0, 0, 0.5);
    color: white;
}

/* ============== 多选选中态 ============== */
.card-tick {
    position: absolute;
    top: 0.3rem;
    left: 0.3rem;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    border: 2px solid rgba(255, 255, 255, 0.95);
    background: rgba(0, 0, 0, 0.25);
    box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.25);
    display: none;
    align-items: center;
    justify-content: center;
    color: transparent;
    pointer-events: none;
    z-index: 2;
}
body.select-mode .card-tick {
    display: inline-flex;
}
.photo-card.selected .card-tick {
    background: var(--pico-primary);
    border-color: white;
    color: white;
}
.photo-card.selected::after {
    content: '';
    position: absolute;
    inset: 0;
    box-shadow: inset 0 0 0 3px var(--pico-primary);
    border-radius: 0.4rem;
    pointer-events: none;
}
body.select-mode .photo-card {
    cursor: pointer;
}

/* ============== 多选浮动操作栏 ============== */
.selection-bar {
    position: fixed;
    bottom: 1rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.6rem 1rem;
    background: var(--pico-card-background-color);
    border: 1px solid var(--pico-muted-border-color);
    border-radius: 0.6rem;
    box-shadow: 0 6px 24px rgba(0, 0, 0, 0.18);
    z-index: 999;
    max-width: 95vw;
    flex-wrap: wrap;
}
.selection-bar .sel-count {
    font-size: 0.9rem;
}
.selection-bar .sel-actions {
    display: flex;
    gap: 0.4rem;
    flex-wrap: wrap;
}
.selection-bar button {
    margin: 0;
    padding: 0.35rem 0.8rem;
    font-size: 0.85rem;
}

.upload-btn {
    display: inline-flex;
    align-items: center;
    background: var(--pico-primary);
    color: var(--pico-primary-inverse);
    padding: 0.5rem 1rem;
    border-radius: 0.4rem;
    cursor: pointer;
}

/* ============== 时间轴 ============== */
.tl-section {
    margin-bottom: 1.5rem;
}
.tl-head {
    margin: 1rem 0 0.5rem 0;
    font-size: 1rem;
    font-weight: 600;
    color: var(--pico-color);
    border-bottom: 1px solid var(--pico-muted-border-color);
    padding-bottom: 0.25rem;
}
.tl-day-head {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin: 0.6rem 0 0.4rem 0;
    font-size: 0.9rem;
    color: var(--pico-muted-color);
    cursor: default;
    user-select: none;
}
body.select-mode .tl-day-head {
    cursor: pointer;
}
.day-checkbox {
    /* 默认隐藏，仅选择模式显示 */
    display: none;
    margin: 0;
    width: 1rem;
    height: 1rem;
    cursor: pointer;
}
body.select-mode .day-checkbox {
    display: inline-block;
}
.tl-day-label {
    line-height: 1;
}

/* ============== 相册右上按钮组 ============== */
.album-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.album-actions button {
    margin: 0;
}
#btn-select-mode {
    padding: 0.5rem 1rem;
}

/* ============== 视频卡片 ============== */
.video-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #2d3748 0%, #1a202c 100%);
    color: rgba(255, 255, 255, 0.85);
    gap: 0.4rem;
    padding: 0.5rem;
    text-align: center;
}
.video-placeholder small {
    font-size: 0.7rem;
    word-break: break-all;
    line-height: 1.2;
    max-height: 2.4em;
    overflow: hidden;
}
.media-badge {
    position: absolute;
    bottom: 0.3rem;
    left: 0.3rem;
    font-size: 0.65rem;
    padding: 0.05rem 0.4rem;
    border-radius: 0.2rem;
    background: rgba(0, 0, 0, 0.6);
    color: white;
}
.photo-card[data-media-type="video"] img {
    /* 视频已生成缩略图（未来 ffmpeg 抽帧）时也加上播放图标蒙层 */
    filter: brightness(0.85);
}

/* ============== Viewer ============== */
#viewer-media {
    display: flex;
    align-items: center;
    justify-content: center;
    background: #000;
    border-radius: 0.4rem;
    min-height: 200px;
}
#photo-viewer img,
#photo-viewer video {
    max-width: 100%;
    max-height: 70vh;
    display: block;
    margin: 0 auto;
    object-fit: contain;
}
#photo-viewer footer .row > div {
    display: flex;
    gap: 0.5rem;
}
#btn-download-photo {
    text-decoration: none;
}

.toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    padding: 0.75rem 1.25rem;
    border-radius: 0.4rem;
    background: var(--pico-card-background-color);
    border: 1px solid var(--pico-muted-border-color);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
    z-index: 1000;
    max-width: 90vw;
}
.toast.error {
    border-color: #e74c3c;
    color: #e74c3c;
}