/**
 * Mermaid Diagram Styles
 *
 * Frontend styles for Mermaid.js diagrams in Airi lessons.
 * Part of the Dual Coding learning science feature.
 *
 * @package Airi
 * @since 3.6.0
 */

/* ==========================================================================
   Diagram Container
   ========================================================================== */

.airi-mermaid-diagram {
    position: relative;
    background: #fff;
    border: 2px solid rgba(102, 126, 234, 0.2);
    border-radius: 16px;
    margin: 24px 0;
    overflow: hidden;
    transition: all 0.3s ease;
}

.airi-mermaid-diagram:hover {
    border-color: rgba(102, 126, 234, 0.4);
    box-shadow: 0 4px 20px rgba(102, 126, 234, 0.1);
}

/* ==========================================================================
   Header
   ========================================================================== */

.airi-mermaid-header {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 14px 20px;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.08) 0%, rgba(118, 75, 162, 0.08) 100%);
    border-bottom: 1px solid rgba(102, 126, 234, 0.15);
}

.airi-mermaid-icon {
    font-size: 20px;
    line-height: 1;
}

.airi-mermaid-title {
    font-size: 15px;
    font-weight: 600;
    color: #1a1a2e;
}

/* ==========================================================================
   Content Area
   ========================================================================== */

.airi-mermaid-content {
    padding: 24px;
    min-height: 150px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow-x: auto;
    transform-origin: center center;
    transition: transform 0.2s ease;
}

.airi-mermaid-content svg {
    max-width: 100%;
    height: auto;
}

/* ==========================================================================
   Loading State
   ========================================================================== */

.airi-mermaid-diagram.is-loading .airi-mermaid-content::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 40px;
    height: 40px;
    border: 3px solid rgba(102, 126, 234, 0.2);
    border-top-color: #667eea;
    border-radius: 50%;
    animation: airi-mermaid-spin 0.8s linear infinite;
}

@keyframes airi-mermaid-spin {
    to {
        transform: translate(-50%, -50%) rotate(360deg);
    }
}

/* ==========================================================================
   Error State
   ========================================================================== */

.airi-mermaid-diagram.has-error {
    border-color: rgba(231, 76, 60, 0.3);
}

.airi-mermaid-diagram.has-error .airi-mermaid-header {
    background: rgba(231, 76, 60, 0.08);
    border-bottom-color: rgba(231, 76, 60, 0.15);
}

.airi-mermaid-error {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 16px 24px;
    background: rgba(231, 76, 60, 0.08);
    border-radius: 8px;
    color: #c0392b;
    font-size: 14px;
}

.airi-mermaid-error .dashicons {
    font-size: 18px;
    width: 18px;
    height: 18px;
}

/* ==========================================================================
   Zoom Controls
   ========================================================================== */

.airi-mermaid-zoom {
    position: absolute;
    top: 60px;
    right: 16px;
    display: flex;
    gap: 4px;
    z-index: 10;
    opacity: 0;
    transition: opacity 0.2s ease;
}

.airi-mermaid-diagram:hover .airi-mermaid-zoom {
    opacity: 1;
}

.airi-mermaid-zoom button {
    width: 32px;
    height: 32px;
    padding: 0;
    border: 1px solid #ddd;
    background: #fff;
    border-radius: 6px;
    font-size: 16px;
    font-weight: 600;
    color: #4a4a68;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.airi-mermaid-zoom button:hover {
    background: #667eea;
    border-color: #667eea;
    color: #fff;
}

.airi-mermaid-zoom .zoom-reset {
    width: auto;
    padding: 0 12px;
    font-size: 12px;
    font-weight: 500;
}

/* ==========================================================================
   Fullscreen Button & Mode
   ========================================================================== */

.airi-mermaid-fullscreen {
    position: absolute;
    bottom: 16px;
    right: 16px;
    width: 36px;
    height: 36px;
    padding: 0;
    border: none;
    background: rgba(102, 126, 234, 0.9);
    border-radius: 8px;
    color: #fff;
    cursor: pointer;
    opacity: 0;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.airi-mermaid-diagram:hover .airi-mermaid-fullscreen {
    opacity: 1;
}

.airi-mermaid-fullscreen:hover {
    background: #667eea;
    transform: scale(1.1);
}

.airi-mermaid-fullscreen .dashicons {
    font-size: 18px;
    width: 18px;
    height: 18px;
}

/* Fullscreen Mode */
.airi-mermaid-diagram.is-fullscreen {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    height: 100%;
    margin: 0;
    border-radius: 0;
    border: none;
    z-index: 99999;
    overflow: auto;
}

.airi-mermaid-diagram.is-fullscreen .airi-mermaid-content {
    min-height: calc(100vh - 80px);
    padding: 40px;
}

.airi-mermaid-diagram.is-fullscreen .airi-mermaid-fullscreen {
    opacity: 1;
    position: fixed;
    bottom: 24px;
    right: 24px;
}

body.airi-mermaid-fullscreen-active {
    overflow: hidden;
}

/* ==========================================================================
   Diagram Type Specific Styles
   ========================================================================== */

/* Flowchart enhancements */
.airi-mermaid-diagram[data-diagram-type="flowchart"] .node rect,
.airi-mermaid-diagram[data-diagram-type="flowchart"] .node circle,
.airi-mermaid-diagram[data-diagram-type="flowchart"] .node ellipse,
.airi-mermaid-diagram[data-diagram-type="flowchart"] .node polygon,
.airi-mermaid-diagram[data-diagram-type="flowchart"] .node path {
    stroke-width: 2px;
}

/* Mind map enhancements */
.airi-mermaid-diagram[data-diagram-type="mindmap"] .mindmap-node {
    font-weight: 500;
}

/* Sequence diagram enhancements */
.airi-mermaid-diagram[data-diagram-type="sequence"] .actor {
    font-weight: 600;
}

/* ==========================================================================
   Dark Mode Support
   ========================================================================== */

@media (prefers-color-scheme: dark) {
    .airi-mermaid-diagram {
        background: #1e1e2e;
        border-color: rgba(102, 126, 234, 0.3);
    }

    .airi-mermaid-header {
        background: rgba(102, 126, 234, 0.15);
        border-bottom-color: rgba(102, 126, 234, 0.2);
    }

    .airi-mermaid-title {
        color: #e0e0e0;
    }

    .airi-mermaid-zoom button {
        background: #2d2d44;
        border-color: #3d3d5c;
        color: #e0e0e0;
    }

    .airi-mermaid-zoom button:hover {
        background: #667eea;
        border-color: #667eea;
    }
}

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 768px) {
    .airi-mermaid-diagram {
        margin: 16px 0;
        border-radius: 12px;
    }

    .airi-mermaid-header {
        padding: 12px 16px;
    }

    .airi-mermaid-content {
        padding: 16px;
    }

    .airi-mermaid-zoom {
        opacity: 1;
        top: auto;
        bottom: 56px;
        right: 12px;
    }

    .airi-mermaid-fullscreen {
        opacity: 1;
        bottom: 12px;
        right: 12px;
    }
}

@media (max-width: 480px) {
    .airi-mermaid-title {
        font-size: 14px;
    }

    .airi-mermaid-content {
        padding: 12px;
    }

    .airi-mermaid-zoom .zoom-reset {
        display: none;
    }
}

/* ==========================================================================
   Print Styles
   ========================================================================== */

@media print {
    .airi-mermaid-diagram {
        break-inside: avoid;
        border: 1px solid #ccc;
        box-shadow: none;
    }

    .airi-mermaid-zoom,
    .airi-mermaid-fullscreen {
        display: none !important;
    }

    .airi-mermaid-content {
        padding: 16px;
    }
}