/* ── Residency Modal ─────────────────────────────────────── */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.72);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    opacity: 0;
    transition: opacity 0.22s ease;
    pointer-events: none;
}

.modal-overlay.open {
    opacity: 1;
    pointer-events: all;
}

.modal-box {
    background: var(--bg-surface, #111827);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    width: 100%;
    max-width: 780px;
    max-height: 90vh;
    overflow-y: auto;
    padding: 40px;
    position: relative;
    transform: translateY(16px) scale(0.98);
    transition: transform 0.22s ease;
    box-shadow: 0 32px 80px rgba(0, 0, 0, 0.5);
}

.modal-overlay.open .modal-box {
    transform: translateY(0) scale(1);
}

.modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    background: rgba(255, 255, 255, 0.07);
    border: 1px solid rgba(255, 255, 255, 0.12);
    color: var(--text-muted, #9CA3AF);
    border-radius: 8px;
    width: 36px;
    height: 36px;
    font-size: 18px;
    line-height: 1;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.15s;
}

.modal-close:hover {
    background: rgba(255, 255, 255, 0.14);
    color: #fff;
}

/* Header */
.modal-header {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 8px;
}

.modal-dot {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    flex-shrink: 0;
    box-shadow: 0 0 14px currentColor;
}

.modal-title {
    font-size: 1.4rem;
    font-weight: 700;
    color: #fff;
    margin: 0;
}

.modal-subtitle {
    font-size: 0.9rem;
    color: var(--text-muted, #9CA3AF);
    margin: 0 0 28px;
    padding-left: 32px;
}

/* Region diagram */
.modal-diagram {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    padding: 24px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 14px;
    margin-bottom: 28px;
    border: 1px solid rgba(255, 255, 255, 0.06);
}

.modal-region {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.modal-region-node {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    border: 2px solid;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-mono, monospace);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    transition: all 0.2s;
}

.modal-region-node.active {
    box-shadow: 0 0 24px currentColor;
}

.modal-region-node.inactive {
    opacity: 0.22;
    filter: grayscale(1);
}

.modal-region-label {
    font-size: 0.7rem;
    font-family: var(--font-mono, monospace);
    letter-spacing: 0.08em;
    color: var(--text-muted, #9CA3AF);
}

.modal-region-label.active {
    color: inherit;
}

.modal-arrow {
    font-size: 1.2rem;
    opacity: 0.35;
    margin-top: -14px;
}

.modal-arrow.active {
    opacity: 0.8;
}

/* Use case description */
.modal-usecase {
    font-size: 0.92rem;
    line-height: 1.65;
    color: var(--text-secondary, #D1D5DB);
    margin-bottom: 28px;
    background: rgba(255, 255, 255, 0.03);
    padding: 16px 20px;
    border-radius: 10px;
    border-left: 3px solid;
}

/* Code tabs */
.modal-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 12px;
}

.modal-tab {
    padding: 6px 14px;
    border-radius: 8px;
    font-family: var(--font-mono, monospace);
    font-size: 0.75rem;
    cursor: pointer;
    border: 1px solid rgba(255, 255, 255, 0.12);
    background: transparent;
    color: var(--text-muted, #9CA3AF);
    transition: all 0.15s;
}

.modal-tab.active {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
    border-color: rgba(255, 255, 255, 0.22);
}

.modal-code-panel {
    display: none;
}

.modal-code-panel.active {
    display: block;
}

.modal-code-block {
    background: #0a0f1a;
    border-radius: 10px;
    padding: 20px;
    overflow-x: auto;
    font-family: var(--font-mono, monospace);
    font-size: 0.78rem;
    line-height: 1.7;
    border: 1px solid rgba(255, 255, 255, 0.07);
}

.modal-code-block .cm {
    color: #6B7280;
}

/* comment */
.modal-code-block .kw {
    color: #93C5FD;
}

/* keyword */
.modal-code-block .st {
    color: #86EFAC;
}

/* string */
.modal-code-block .fn {
    color: #FCD34D;
}

/* function */
.modal-code-block .num {
    color: #F9A8D4;
}

/* number */
.modal-code-block .typ {
    color: #67E8F9;
}

/* type */
.modal-code-block .var {
    color: #E5E7EB;
}

/* var */

.modal-one-mesh-note {
    margin-top: 20px;
    padding: 14px 18px;
    background: rgba(0, 212, 255, 0.06);
    border: 1px solid rgba(0, 212, 255, 0.18);
    border-radius: 10px;
    font-size: 0.82rem;
    line-height: 1.55;
    color: var(--text-secondary, #D1D5DB);
}

.modal-one-mesh-note strong {
    color: #00D4FF;
}

/* Clickable legend items */
.mesh-legend-item {
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 6px;
    border: 1px solid transparent;
    transition: background 0.15s, border-color 0.15s;
}

.mesh-legend-item:hover {
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(255, 255, 255, 0.12);
}

.mesh-legend-item:focus-visible {
    outline: 2px solid var(--c, #fff);
    outline-offset: 2px;
}