:root {
    --primary: #1e4b69;
    --accent: rgb(70, 180, 200);
    --bg: #f5f7fa;
    --highlight: #f39c12;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', system-ui, sans-serif;
    background: var(--bg);
    color: #333;
    padding: 20px;
    display: flex;
    justify-content: center;
}

.container {
    max-width: 1050px;
    width: 100%;
}

h1 {
    color: var(--primary);
    text-align: center;
    font-size: 1.6rem;
    margin-bottom: 4px;
}

.subtitle {
    text-align: center;
    color: #666;
    margin-bottom: 24px;
    font-size: 0.95rem;
}

.pipeline-area {
    background: white;
    border-radius: 12px;
    padding: 30px 20px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
    overflow-x: auto;
}

.pipeline-flow {
    display: flex;
    align-items: flex-start;
    gap: 0;
    min-width: 900px;
}

.stage {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
    transition: opacity 0.3s;
}

.pipeline-flow.path-active .stage {
    opacity: 0.35;
}

.pipeline-flow.path-active .stage.in-path {
    opacity: 1;
}

.stage-box {
    background: white;
    border: 2px solid #dce3e8;
    border-radius: 10px;
    padding: 14px 10px;
    text-align: center;
    width: 100%;
    max-width: 140px;
    cursor: default;
    transition: all 0.25s;
    position: relative;
    z-index: 2;
}

.stage-box:hover {
    border-color: var(--accent);
    box-shadow: 0 3px 12px rgba(70, 180, 200, 0.25);
    transform: translateY(-2px);
}

.stage.in-path .stage-box {
    border-color: var(--highlight);
    background: #fffbf0;
    box-shadow: 0 3px 12px rgba(243, 156, 18, 0.2);
}

.stage-icon {
    font-size: 1.6rem;
    margin-bottom: 6px;
}

.stage-label {
    font-weight: 700;
    color: var(--primary);
    font-size: 0.85rem;
    margin-bottom: 4px;
}

.stage-items {
    list-style: none;
    padding: 0;
}

.stage-items li {
    font-size: 0.75rem;
    color: #777;
    padding: 1px 0;
}

.arrow-connector {
    display: flex;
    align-items: center;
    padding: 0 2px;
    margin-top: 30px;
    color: #bbb;
    font-size: 1.2rem;
    flex-shrink: 0;
    transition: color 0.3s;
}

.pipeline-flow.path-active .arrow-connector {
    color: #ddd;
}

.pipeline-flow.path-active .arrow-connector.in-path {
    color: var(--highlight);
}

.consumers-section {
    margin-top: 6px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
}

.consumer-btn {
    padding: 6px 12px;
    border: 2px solid #dce3e8;
    border-radius: 8px;
    background: white;
    cursor: pointer;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--primary);
    transition: all 0.2s;
    width: 100%;
    max-width: 140px;
}

.consumer-btn:hover {
    border-color: var(--accent);
    background: #f0fbfd;
}

.consumer-btn.active {
    border-color: var(--highlight);
    background: #fff8e1;
    color: #d35400;
    box-shadow: 0 2px 8px rgba(243, 156, 18, 0.2);
}

.tooltip {
    position: fixed;
    background: var(--primary);
    color: white;
    padding: 10px 14px;
    border-radius: 8px;
    font-size: 0.85rem;
    max-width: 280px;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.2s;
    z-index: 100;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    line-height: 1.4;
}

.tooltip.visible {
    opacity: 1;
}

@media (max-width: 960px) {
    .pipeline-flow {
        min-width: 800px;
    }
}