/**
 * 期货实时行情（/tools/futures）
 * class 前缀 fu-，复用站点主题变量，深浅色自动适配。
 * 涨跌配色遵循国内习惯：红涨（--danger）绿跌（--success）。
 */

.fu-app {
    display: flex;
    flex-direction: column;
    gap: 14px;
    padding: 18px 20px 26px;
    box-sizing: border-box;
    color: var(--text-primary);
}

/* ============ 头部 ============ */
.fu-head {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 14px;
    flex-wrap: wrap;
}

.fu-title {
    margin: 0;
    font-size: 22px;
    font-weight: 700;
    letter-spacing: .3px;
}

.fu-sub {
    display: block;
    margin-top: 4px;
    font-size: 12.5px;
    color: var(--text-secondary);
}

.fu-head-right {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.fu-live {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 5px 11px;
    border: 1px solid var(--border-color);
    border-radius: 999px;
    font-size: 12.5px;
    color: var(--text-secondary);
    background: var(--bg-secondary);
    white-space: nowrap;
}

.fu-live-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--text-secondary);
    flex: 0 0 auto;
}

.fu-live.is-on .fu-live-dot {
    background: var(--success);
    animation: fu-pulse 1.6s ease-in-out infinite;
}

.fu-live.is-err .fu-live-dot {
    background: var(--danger);
}

@keyframes fu-pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50%      { opacity: .35; transform: scale(.82); }
}

@media (prefers-reduced-motion: reduce) {
    .fu-live.is-on .fu-live-dot { animation: none; }
}

.fu-btn {
    appearance: none;
    border: 1px solid var(--border-color);
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 13px;
    padding: 7px 14px;
    border-radius: 9px;
    cursor: pointer;
    transition: border-color .15s, background .15s, color .15s;
    white-space: nowrap;
}

.fu-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.fu-btn:disabled {
    opacity: .5;
    cursor: not-allowed;
}

.fu-btn.primary {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
}

.fu-btn.is-active {
    border-color: var(--accent);
    color: var(--accent);
}

.fu-check {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: var(--text-secondary);
    cursor: pointer;
    user-select: none;
    padding: 5px 10px;
    border: 1px solid var(--border-color);
    border-radius: 9px;
    background: var(--bg-secondary);
}

.fu-check input { accent-color: var(--accent); margin: 0; cursor: pointer; }

/* ============ 主体：左列表 + 右图表 ============ */
.fu-body {
    display: flex;
    gap: 16px;
    align-items: stretch;
    min-height: 0;
}

.fu-side {
    flex: 0 0 272px;
    width: 272px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 14px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    max-height: clamp(360px, 72vh, 860px);
}

.fu-side-scroll {
    overflow-y: auto;
    overflow-x: hidden;
    padding: 8px 8px 12px;
    scrollbar-width: thin;
}

.fu-group-title {
    font-size: 11.5px;
    font-weight: 600;
    letter-spacing: 1px;
    color: var(--text-secondary);
    padding: 10px 8px 6px;
}

.fu-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    width: 100%;
    text-align: left;
    padding: 8px 10px;
    border: 1px solid transparent;
    border-radius: 10px;
    background: transparent;
    color: var(--text-primary);
    cursor: pointer;
    font-size: 13.5px;
    transition: background .14s, border-color .14s;
}

.fu-item:hover { background: var(--bg-primary); }

.fu-item.is-active {
    background: var(--bg-primary);
    border-color: var(--accent);
}

.fu-item-name {
    display: flex;
    align-items: baseline;
    gap: 6px;
    min-width: 0;
}

.fu-item-name b {
    font-weight: 600;
    font-size: 13.5px;
    white-space: nowrap;
}

.fu-item-name small {
    font-size: 10.5px;
    color: var(--text-secondary);
    white-space: nowrap;
}

.fu-item-right {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 2px;
    flex: 0 0 auto;
}

.fu-item-price {
    font-variant-numeric: tabular-nums;
    font-size: 13px;
    font-weight: 600;
}

.fu-item-pct {
    font-variant-numeric: tabular-nums;
    font-size: 11.5px;
    font-weight: 600;
    padding: 1px 5px;
    border-radius: 5px;
    min-width: 52px;
    text-align: center;
}

/* 涨跌 */
.fu-up   { color: var(--danger); }
.fu-down { color: var(--success); }
.fu-flat { color: var(--text-secondary); }

.fu-item-pct.fu-up,
.fu-item-pct.fu-down {
    color: #fff;
}

.fu-item-pct.fu-up   { background: var(--danger); }
.fu-item-pct.fu-down { background: var(--success); }
.fu-item-pct.fu-flat { background: var(--text-secondary); color: #fff; }

/* ============ 主区 ============ */
.fu-main {
    flex: 1 1 auto;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.fu-quote {
    display: flex;
    align-items: center;
    gap: 18px;
    flex-wrap: wrap;
    padding: 14px 18px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 14px;
}

.fu-q-main { display: flex; flex-direction: column; gap: 2px; }

.fu-q-name {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 15px;
    font-weight: 600;
}

.fu-q-tag {
    font-size: 11px;
    font-weight: 500;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    border-radius: 5px;
    padding: 1px 6px;
}

.fu-q-price {
    font-size: 30px;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    line-height: 1.15;
}

.fu-q-chg {
    display: flex;
    flex-direction: column;
    font-size: 14px;
    font-weight: 600;
    font-variant-numeric: tabular-nums;
    gap: 2px;
}

.fu-q-grid {
    display: grid;
    grid-template-columns: repeat(6, minmax(72px, auto));
    gap: 4px 18px;
    margin: 0;
    flex: 1 1 auto;
    min-width: 0;
}

.fu-q-grid > div { display: flex; flex-direction: column; gap: 2px; }

.fu-q-grid dt {
    font-size: 11px;
    color: var(--text-secondary);
    margin: 0;
}

.fu-q-grid dd {
    margin: 0;
    font-size: 13px;
    font-variant-numeric: tabular-nums;
    font-weight: 600;
}

.fu-q-time {
    font-size: 11.5px;
    color: var(--text-secondary);
    white-space: nowrap;
}

.fu-unit {
    font-size: 11px;
    font-weight: 400;
    color: var(--text-secondary);
    margin-left: 4px;
}

/* ============ 工具栏 ============ */
.fu-toolbar {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.fu-seg {
    display: inline-flex;
    padding: 3px;
    gap: 2px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
}

.fu-seg-btn {
    appearance: none;
    border: 0;
    background: transparent;
    color: var(--text-secondary);
    font-size: 12.5px;
    padding: 5px 12px;
    border-radius: 7px;
    cursor: pointer;
    white-space: nowrap;
    transition: background .14s, color .14s;
}

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

.fu-seg-btn.is-active {
    background: var(--accent);
    color: #fff;
    font-weight: 600;
}

.fu-seg-btn:disabled { opacity: .38; cursor: not-allowed; }

.fu-tool-sep {
    flex: 1 1 auto;
}

/* ============ 图表 ============ */
.fu-chart {
    position: relative;
    height: clamp(380px, 60vh, 760px);
    min-height: 320px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 14px;
    overflow: hidden;
}

.fu-chart canvas {
    display: block;
    width: 100%;
    height: 100%;
    touch-action: none;
    cursor: crosshair;
}

.fu-tip {
    position: absolute;
    top: 8px;
    left: 8px;
    z-index: 3;
    pointer-events: none;
    min-width: 168px;
    padding: 9px 11px;
    font-size: 12px;
    line-height: 1.65;
    border-radius: 9px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    box-shadow: 0 8px 26px rgba(0, 0, 0, .28);
    font-variant-numeric: tabular-nums;
}

.fu-tip-row {
    display: flex;
    justify-content: space-between;
    gap: 14px;
}

.fu-tip-row span:first-child { color: var(--text-secondary); }

.fu-tip-date {
    padding-bottom: 4px;
    margin-bottom: 4px;
    border-bottom: 1px solid var(--border-color);
    font-weight: 600;
}

.fu-chart-loading,
.fu-empty {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13.5px;
    color: var(--text-secondary);
    background: var(--bg-secondary);
    z-index: 2;
}

.fu-fallback {
    position: absolute;
    left: 10px;
    right: 10px;
    bottom: 10px;
    z-index: 3;
    padding: 7px 11px;
    font-size: 12px;
    border-radius: 8px;
    color: var(--text-secondary);
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
}

/* ★ [hidden] 兜底：上面多处 display:flex 会覆盖原生 hidden */
.fu-app [hidden] { display: none !important; }

.fu-note {
    font-size: 11.5px;
    color: var(--text-secondary);
    line-height: 1.7;
}

.fu-note a { color: var(--accent); text-decoration: none; }
.fu-note a:hover { text-decoration: underline; }

/* ============ 响应式 ============ */
@media (max-width: 1200px) {
    .fu-side { flex-basis: 236px; width: 236px; }
    .fu-q-grid { grid-template-columns: repeat(3, minmax(78px, auto)); }
}

@media (max-width: 991px) {
    .fu-app { padding: 14px 14px 22px; }
    .fu-body { flex-direction: column; }

    /* 品种列表改为横向滚动 chips */
    .fu-side {
        flex: 0 0 auto;
        width: 100%;
        max-height: none;
    }

    .fu-side-scroll {
        display: flex;
        gap: 8px;
        overflow-x: auto;
        overflow-y: hidden;
        padding: 10px;
        align-items: stretch;
    }

    .fu-group-title {
        writing-mode: horizontal-tb;
        padding: 0 2px;
        align-self: center;
        font-size: 11px;
        flex: 0 0 auto;
        border-left: 2px solid var(--border-color);
        padding-left: 8px;
    }

    .fu-item {
        flex: 0 0 auto;
        width: auto;
        border-color: var(--border-color);
        background: var(--bg-primary);
    }

    .fu-item-right { min-width: 74px; }

    .fu-chart { height: clamp(360px, 56vh, 620px); }
}

@media (max-width: 767px) {
    .fu-title { font-size: 19px; }

    .fu-head {
        align-items: stretch;
        flex-direction: column;
        gap: 10px;
    }

    .fu-quote {
        padding: 12px 14px;
        gap: 12px;
    }

    .fu-q-price { font-size: 26px; }

    .fu-q-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 8px 10px;
        width: 100%;
    }

    .fu-toolbar { gap: 6px; }

    .fu-seg { flex: 1 1 auto; overflow-x: auto; }

    .fu-seg-btn { padding: 6px 10px; font-size: 12px; }

    .fu-chart { height: clamp(340px, 62vh, 560px); min-height: 300px; }

    .fu-tip { font-size: 11.5px; min-width: 150px; padding: 7px 9px; }
}

@media (max-width: 420px) {
    .fu-app { padding: 10px 10px 18px; }
    .fu-q-price { font-size: 23px; }
    .fu-q-grid { grid-template-columns: repeat(2, 1fr); }
    .fu-btn { padding: 6px 10px; font-size: 12px; }
}

@media print {
    .fu-head-right,
    .fu-toolbar,
    .fu-side,
    .fu-tip { display: none !important; }
}