/* ===== 流程图（Excalidraw） ===== */
.flowchart-main {
    max-width: 1280px;
}

.flowchart-hero {
    margin-bottom: 1.25rem;
}

.flowchart-section {
    margin-bottom: 2.5rem;
}

.flowchart-section:fullscreen,
.flowchart-section:-webkit-full-screen {
    box-sizing: border-box;
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 1rem 1.25rem 1.25rem;
    display: flex;
    flex-direction: column;
    background:
        radial-gradient(circle at 18% 15%, color-mix(in srgb, var(--cyan) 16%, transparent), transparent 42%),
        radial-gradient(circle at 82% 78%, color-mix(in srgb, var(--purple, #7B2FFF) 14%, transparent), transparent 45%),
        var(--bg, #0b1220);
}

.flowchart-section:fullscreen .flowchart-toolbar,
.flowchart-section:-webkit-full-screen .flowchart-toolbar {
    flex-shrink: 0;
}

.flowchart-section:fullscreen .flowchart-workspace,
.flowchart-section:-webkit-full-screen .flowchart-workspace {
    flex: 1;
    min-height: 0;
}

.flowchart-section:fullscreen .flowchart-canvas,
.flowchart-section:-webkit-full-screen .flowchart-canvas {
    min-height: 0;
    height: 100%;
}

.flowchart-section:fullscreen .flowchart-side,
.flowchart-section:-webkit-full-screen .flowchart-side {
    max-height: 100%;
    overflow: auto;
}

.flowchart-toolbar {
    display: flex;
    flex-wrap: wrap;
    gap: .65rem 1rem;
    align-items: center;
    margin-bottom: .85rem;
    padding: .75rem .9rem;
    background: var(--bg-card, rgba(255,255,255,.04));
    border: 1px solid var(--border);
    border-radius: 12px;
}

.flowchart-toolbar-group {
    display: flex;
    flex-wrap: wrap;
    gap: .45rem;
}

.flowchart-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 32px;
    padding: .35rem .75rem;
    font-size: .8rem;
    font-weight: 600;
    color: var(--text-secondary);
    background: rgba(0,0,0,.22);
    border: 1px solid var(--border);
    border-radius: 8px;
    cursor: pointer;
    transition: color .2s, border-color .2s, background .2s, transform .15s;
    user-select: none;
}

.flowchart-btn:hover {
    color: var(--cyan);
    border-color: var(--cyan);
    background: var(--cyan-subtle);
}

.flowchart-btn:disabled {
    opacity: .4;
    cursor: not-allowed;
    pointer-events: none;
}

.flowchart-btn-primary {
    color: #0b1220;
    background: linear-gradient(135deg, var(--cyan), #38bdf8);
    border-color: transparent;
}

.flowchart-btn-primary:hover {
    color: #0b1220;
    filter: brightness(1.05);
}

.flowchart-btn-danger:hover {
    color: #ff6b9d;
    border-color: #ff6b9d;
    background: rgba(255,107,157,.12);
}

.flowchart-btn-file {
    position: relative;
    overflow: hidden;
}

.flowchart-save-status {
    margin-left: auto;
    font-size: .78rem;
    color: var(--text-muted);
    font-weight: 600;
}

.flowchart-save-status.is-saved {
    color: var(--cyan);
}

.flowchart-save-status.is-error {
    color: #ff6b9d;
}

.flowchart-workspace {
    display: grid;
    grid-template-columns: 1fr 220px;
    gap: .9rem;
    min-height: 620px;
}

.flowchart-canvas {
    position: relative;
    isolation: isolate;
    overflow: hidden;
    min-height: 620px;
    height: calc(100vh - 320px);
    border: 1px solid var(--border);
    border-radius: 14px;
    background:
        radial-gradient(circle at 20% 20%, rgba(0,212,255,.06), transparent 40%),
        radial-gradient(circle at 80% 70%, rgba(123,47,255,.06), transparent 42%),
        linear-gradient(180deg, rgba(255,255,255,.03), rgba(0,0,0,.12));
}

.flowchart-app {
    position: absolute;
    inset: 0;
}

/* 画板内部由 Excalidraw 自己管样式，避免站点全局 * 重置干扰控件 */
.flowchart-app .excalidraw {
    --ui-font: Assistant, "Microsoft YaHei", "PingFang SC", sans-serif;
}

.flowchart-app .excalidraw,
.flowchart-app .excalidraw-wrapper {
    height: 100% !important;
    width: 100% !important;
}

.flowchart-loading {
    position: absolute;
    inset: 0;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    font-size: .92rem;
    font-weight: 600;
    letter-spacing: .04em;
    pointer-events: none;
}

.flowchart-side {
    padding: 1rem;
    border: 1px solid var(--border);
    border-radius: 14px;
    background: var(--bg-card, rgba(255,255,255,.03));
}

.flowchart-side-title {
    margin: 0 0 .75rem;
    font-size: .92rem;
    color: var(--text-primary);
}

.flowchart-tips {
    margin: 0;
    padding: 0;
    list-style: none;
    display: grid;
    gap: .55rem;
}

.flowchart-tips li {
    font-size: .8rem;
    color: var(--text-secondary);
    line-height: 1.45;
}

.flowchart-tips kbd {
    display: inline-block;
    min-width: 2.4rem;
    padding: .1rem .35rem;
    margin-right: .25rem;
    border: 1px solid var(--border);
    border-radius: 5px;
    background: rgba(0,0,0,.25);
    color: var(--cyan);
    font-size: .72rem;
    font-family: inherit;
    text-align: center;
}

.flowchart-side-note {
    margin: 1rem 0 0;
    padding-top: .85rem;
    border-top: 1px solid var(--border);
    font-size: .75rem;
    color: var(--text-muted);
    line-height: 1.5;
}

@media (max-width: 900px) {
    .flowchart-workspace {
        grid-template-columns: 1fr;
    }

    .flowchart-canvas {
        min-height: 520px;
        height: 70vh;
    }

    .flowchart-side {
        order: -1;
    }

    .flowchart-save-status {
        margin-left: 0;
        width: 100%;
    }
}

@media (max-width: 600px) {
    .flowchart-toolbar {
        padding: .65rem;
    }

    .flowchart-btn {
        font-size: .75rem;
        padding: .3rem .55rem;
    }
}