/* ============================================================
   RegionPicker / CityPicker - 省市区选择器通用样式
   依赖 CSS 变量：--primary --primary-soft --accent --accent-deep
                  --card --bg --bg-deep --line --text --text-emp
                  --text-mute --text-faint --inverse --ease-quiet
   ============================================================ */

/* —— 筛选器容器 —— */
.rp-filter-wrap {
    position: relative;
    background: var(--card);
    border-radius: 12px;
    box-shadow: 0 2px 12px -4px rgba(15, 37, 64, 0.06);
    z-index: 20;
}

.rp-body {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 1rem;
    align-items: center;
}

.rp-group { position: relative; min-width: 0; }

/* —— 触发器按钮 —— */
.rp-trigger {
    width: 100%;
    display: grid;
    grid-template-columns: auto 1fr auto;
    gap: 0.8rem;
    align-items: center;
    padding: 1rem 1.2rem;
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: 8px;
    cursor: pointer;
    font-family: inherit;
    text-align: left;
    transition: all 0.3s var(--ease-quiet);
    box-shadow: 0 2px 8px -4px rgba(15, 37, 64, 0.04);
}
.rp-trigger:hover {
    border-color: var(--primary);
    box-shadow: 0 4px 12px -4px rgba(22, 119, 255, 0.15);
}
.rp-trigger.is-open {
    border-color: var(--primary);
    box-shadow: 0 4px 12px -4px rgba(22, 119, 255, 0.15);
}

.rp-trigger-icon {
    width: 32px; height: 32px;
    background: var(--primary-soft);
    border-radius: 6px;
    display: flex; align-items: center; justify-content: center;
    flex-shrink: 0;
}
.rp-trigger-icon svg { width: 16px; height: 16px; stroke: var(--primary); stroke-width: 2; }

.rp-trigger-body {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
    min-width: 0;
}
.rp-trigger-label {
    font-family: 'Roboto', sans-serif;
    font-weight: 400;
    font-size: 0.7rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-faint);
}
.rp-trigger-value {
    font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
    font-weight: 500;
    font-size: 1rem;
    color: var(--text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.rp-trigger-value .sep { color: var(--text-faint); margin: 0 0.3rem; }

.rp-trigger-arrow {
    width: 14px; height: 14px;
    stroke: var(--text-mute);
    stroke-width: 2;
    transition: all 0.3s var(--ease-quiet);
}
.rp-trigger.is-open .rp-trigger-arrow {
    transform: rotate(180deg);
    stroke: var(--primary);
}

/* —— 连接符 —— */
.rp-connector {
    font-family: 'Oswald', sans-serif;
    font-weight: 300;
    font-size: 1.4rem;
    color: var(--accent);
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
}
.rp-connector svg { width: 24px; height: 24px; stroke: var(--accent); stroke-width: 1.5; fill: var(--accent); }

/* —— 下拉面板 —— */
.rp-panel {
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    width: 100%;
    min-width: 480px;
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: 12px;
    box-shadow: 0 20px 40px -12px rgba(15, 37, 64, 0.15);
    display: flex;
    flex-direction: column;
    max-height: 420px;
    opacity: 0;
    transform: translateY(-8px);
    pointer-events: none;
    transition: all 0.3s var(--ease-quiet);
    z-index: 50;
    overflow: hidden;
}
.rp-group[data-type="to"] .rp-panel { left: auto; right: 0; }
.rp-panel.is-open {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

/* —— 面板内三列布局 —— */
.rp-panel-columns {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    flex: 1;
    overflow: hidden;
}
.rp-column {
    border-right: 1px solid var(--line);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    min-width: 0;
}
.rp-column:last-child { border-right: none; }

.rp-column-head {
    padding: 0.8rem 1rem;
    background: var(--bg);
    font-family: 'Roboto', sans-serif;
    font-weight: 500;
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-mute);
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    flex-shrink: 0;
}
.rp-column-head .rp-column-count {
    font-family: 'Oswald', sans-serif;
    font-weight: 500;
    font-size: 0.85rem;
    color: var(--primary);
}

.rp-column-body {
    overflow-y: auto;
    flex: 1;
    padding: 0.3rem;
}

/* —— 选项 —— */
.rp-item {
    position: relative;
    padding: 0.6rem 0.8rem;
    cursor: pointer;
    font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
    font-size: 0.88rem;
    color: var(--text-emp);
    border-radius: 6px;
    transition: all 0.2s var(--ease-quiet);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.rp-item:hover {
    background: var(--bg-deep);
    color: var(--primary);
}
.rp-item.is-selected,
.rp-item.is-active {
    background: var(--primary-soft);
    color: var(--primary);
    font-weight: 500;
}

.rp-empty-col {
    padding: 2rem 1rem;
    text-align: center;
    font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
    font-size: 0.8rem;
    color: var(--text-faint);
}

/* —— 底部操作区 —— */
.rp-footer {
    flex-shrink: 0;
    padding: 0.8rem 1.2rem;
    border-top: 1px solid var(--line);
    background: var(--card);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
}
.rp-footer-info {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8rem;
    color: var(--text-mute);
}

.rp-confirm-btn {
    background: var(--text-faint);
    color: var(--inverse);
    border: none;
    padding: 0.5rem 1.5rem;
    border-radius: 6px;
    font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
    font-weight: 500;
    font-size: 0.85rem;
    cursor: not-allowed;
    transition: all 0.3s var(--ease-quiet);
}
.rp-confirm-btn.is-ready {
    background: var(--accent);
    cursor: pointer;
    box-shadow: 0 4px 12px -2px rgba(255, 107, 53, 0.3);
}
.rp-confirm-btn.is-ready:hover {
    background: var(--accent-deep);
}

.rp-footer-btns {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    flex-shrink: 0;
}

.rp-clear-btn {
    background: transparent;
    color: var(--text-mute);
    border: 1px solid var(--line);
    padding: 0.5rem 1rem;
    border-radius: 6px;
    font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
    font-weight: 500;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.3s var(--ease-quiet);
    white-space: nowrap;
}
.rp-clear-btn:hover {
    color: var(--primary);
    border-color: var(--primary);
    background: var(--primary-soft);
}

/* —— 单触发器（CityPicker）自适应 —— */
.rp-body-single {
    display: block;
}
.rp-body-single .rp-panel {
    min-width: 100%;
}

/* —— 响应式 —— */
@media (max-width: 768px) {
    .rp-body { grid-template-columns: 1fr; gap: 0.5rem; }
    .rp-connector { transform: rotate(90deg); margin: 0.5rem 0; }
    .rp-trigger { padding: 0.8rem 1rem; }

    .rp-panel { max-height: 70vh; min-width: 0; }
    .rp-group[data-type="to"] .rp-panel { left: 0; right: 0; }
}