/* Relationship Graph Types Stylesheet
 * ====================================
 * Demonstrates different edge relationship types in graph visualizations
 */

/* ===========================================
   RESET & BASE STYLES
   =========================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Arial, sans-serif;
    background-color: #f5f5f5;
}

/* ===========================================
   MAIN CONTAINER & NETWORK CANVAS
   =========================================== */
.container {
    position: relative;
    width: 100%;
    height: 100vh;
}

#network {
    width: 100%;
    height: 100%;
    background-color: #f5f5f5;
}

/* ===========================================
   TITLE (Top Center)
   =========================================== */
.title {
    position: absolute;
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 20px;
    font-weight: bold;
    color: #333;
    background-color: rgba(245, 245, 245, 0.9);
    padding: 5px 15px;
    border-radius: 5px;
    z-index: 10;
}

/* ===========================================
   LEGEND (Upper Left)
   =========================================== */
.legend {
    position: absolute;
    top: 10px;
    left: 10px;
    padding: 12px 15px;
    background-color: rgba(255, 255, 255, 0.95);
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.15);
    z-index: 10;
}

.legend-title {
    font-weight: bold;
    font-size: 14px;
    margin-bottom: 10px;
    padding-bottom: 6px;
    border-bottom: 1px solid #ddd;
}

.legend-item {
    display: flex;
    align-items: center;
    margin: 8px 0;
    font-size: 12px;
    padding: 4px 8px;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.2s;
}

.legend-item:hover {
    background-color: #f0f0f0;
}

.legend-item.active {
    background-color: #e8e8e8;
}

.legend-line {
    width: 40px;
    height: 4px;
    margin-right: 10px;
    position: relative;
}

/* Edge type styles for legend */
.prerequisite-line {
    background-color: #2980B9;
}

.prerequisite-line::after {
    content: '';
    position: absolute;
    right: 0;
    top: -3px;
    border: 5px solid transparent;
    border-left-color: #2980B9;
}

.related-line {
    background: repeating-linear-gradient(
        90deg,
        #7F8C8D 0px,
        #7F8C8D 5px,
        transparent 5px,
        transparent 10px
    );
}

.contrasts-line {
    background-color: #E74C3C;
}

.exemplifies-line {
    background: repeating-linear-gradient(
        90deg,
        #27AE60 0px,
        #27AE60 2px,
        transparent 2px,
        transparent 6px
    );
}

.exemplifies-line::after {
    content: '';
    position: absolute;
    right: 0;
    top: -3px;
    border: 5px solid transparent;
    border-left-color: #27AE60;
}

.influences-line {
    background-color: #9B59B6;
    border-radius: 0 0 10px 10px;
    transform: rotate(-10deg);
}

.influences-line::after {
    content: '';
    position: absolute;
    right: 0;
    top: -3px;
    border: 5px solid transparent;
    border-left-color: #9B59B6;
}

.legend-hint {
    font-size: 10px;
    color: #888;
    margin-top: 8px;
    text-align: center;
    font-style: italic;
}

/* ===========================================
   RIGHT PANEL (Info Display)
   =========================================== */
.right-panel {
    position: absolute;
    top: 50px;
    right: 10px;
    width: 220px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    z-index: 10;
}

/* ===========================================
   INFO PANEL
   =========================================== */
.info-panel {
    background-color: rgba(255, 255, 255, 0.95);
    border-radius: 8px;
    padding: 15px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.15);
    max-height: 400px;
    overflow-y: auto;
}

.info-title {
    font-weight: bold;
    font-size: 16px;
    margin-bottom: 10px;
    padding-bottom: 8px;
    border-bottom: 2px solid #ddd;
}

.info-text {
    font-size: 13px;
    line-height: 1.6;
}

.info-text p {
    margin-bottom: 10px;
}

.info-hint {
    background-color: #f8f8f8;
    padding: 8px;
    border-radius: 4px;
    border-left: 3px solid #3498DB;
}

/* ===========================================
   RESPONSIVE STYLES
   =========================================== */
@media (max-width: 768px) {
    .title {
        font-size: 16px;
        top: 5px;
    }

    .legend {
        padding: 8px 10px;
        max-width: 160px;
    }

    .legend-title {
        font-size: 12px;
    }

    .legend-item {
        font-size: 10px;
        margin: 5px 0;
    }

    .legend-line {
        width: 30px;
    }

    .right-panel {
        width: 180px;
        top: 40px;
    }

    .info-panel {
        padding: 10px;
    }

    .info-title {
        font-size: 14px;
    }

    .info-text {
        font-size: 11px;
    }
}

@media (max-width: 480px) {
    .legend {
        display: none;
    }

    .right-panel {
        width: 160px;
    }
}