@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;700&display=swap');

:root {
    --bg-color: #0f172a;
    --primary-card-color: #1e293b;
    --secondary-card-color: rgba(45, 55, 72, 0.7);
    --text-color: #e2e8f0;
    --text-muted-color: #94a3b8;
    --accent-color: #22d3ee;
    --border-color: rgba(255, 255, 255, 0.1);
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    margin: 0;
    padding: 40px 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    overflow-x: hidden;
}

.header {
    text-align: center;
    margin-bottom: 60px;
}

.header h1 {
    color: #ffffff;
    font-weight: 700;
    font-size: 2.5em;
}

.header p {
    color: var(--text-muted-color);
    font-size: 1.1em;
    max-width: 800px;
}

.main-flowchart {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
    position: relative;
    flex-wrap: wrap;
}

.main-stage-box {
    background-color: var(--primary-card-color);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 20px;
    text-align: center;
    width: 180px;
    height: 120px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    box-shadow: 0 4px 6px rgba(0,0,0,0.1), 0 1px 3px rgba(0,0,0,0.08);
    position: relative;
}

.main-stage-box:hover {
    transform: translateY(-12px) scale(1.05);
    box-shadow: 0 20px 25px rgba(0,0,0,0.15), 0 8px 10px rgba(0,0,0,0.08);
    border-color: var(--accent-color);
}

.main-stage-box .icon {
    font-size: 2.8em;
    margin-bottom: 12px;
    color: var(--accent-color);
    transition: color 0.3s ease;
}

.main-stage-box .title {
    font-weight: 500;
    color: var(--text-color);
    font-size: 1.05em;
}

.arrow {
    font-size: 2.5em;
    color: #4a5568;
    display: flex;
    align-items: center;
}

@media (max-width: 1200px) {
    .arrow {
        transform: rotate(90deg);
        margin: 15px 0;
    }
}

.details-popup {
    position: absolute;
    background-color: var(--secondary-card-color);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    padding: 25px;
    min-width: 650px;
    z-index: 100;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, transform 0.3s ease;
    transform: translateY(20px);
    top: 100%;
    left: 50%;
    margin-top: 25px;
}

.details-popup.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.details-flow {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    font-size: 0.9em;
}

.details-flow .node, .details-flow .process, .details-flow .database, .details-flow .output {
    padding: 12px 18px;
    border-radius: 8px;
    text-align: center;
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid rgba(34, 211, 238, 0.3);
    color: var(--text-color);
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    white-space: nowrap;
}

.details-flow .database {
    background: rgba(51, 65, 85, 0.6);
    border-color: rgba(148, 163, 184, 0.3);
}

.details-flow .output {
    background: rgba(14, 116, 144, 0.5);
    border-color: rgba(103, 232, 249, 0.4);
}

.details-flow .detail-arrow {
    font-size: 1.5em;
    color: var(--text-muted-color);
}

.details-flow-vertical {
    flex-direction: column;
}