/* ═══════════════════════════════════════════════════════════════════════════════
   FIXAIR DIAGRAM SYSTEM - PREMIUM STYLES
   Version: 2.3.0
   
   Integration:
   1. Include Mermaid CDN: <script src="https://cdn.jsdelivr.net/npm/mermaid@10/dist/mermaid.min.js"></script>
   2. Include this CSS file
   3. Include fixair-diagrams.js AFTER Mermaid
   
   ═══════════════════════════════════════════════════════════════════════════════ */

/* ─────────────────────────────────────────────────────────────────────────────────
   CSS VARIABLES - Uses 'fd-' prefix to avoid conflicts
   ───────────────────────────────────────────────────────────────────────────────── */
:root {
    /* Backgrounds */
    --fd-bg-page: #09090b;
    --fd-bg-card: #111113;
    --fd-bg-node: #18181b;
    --fd-bg-node-alt: #1f1f23;
    
    /* Borders */
    --fd-border-subtle: rgba(255, 255, 255, 0.06);
    --fd-border-node: rgba(255, 255, 255, 0.1);
    --fd-border-hover: rgba(255, 255, 255, 0.15);
    
    /* Text */
    --fd-text-white: #fafafa;
    --fd-text-primary: #e4e4e7;
    --fd-text-secondary: #71717a;
    --fd-text-muted: #52525b;
    
    /* Lines */
    --fd-line-color: #3f3f46;
    --fd-line-light: #27272a;
    
    /* Accents */
    --fd-accent-orange: #f97316;
    --fd-accent-green: #22c55e;
    --fd-accent-blue: #3b82f6;
    --fd-accent-red: #ef4444;
    --fd-accent-purple: #a855f7;
}


/* ─────────────────────────────────────────────────────────────────────────────────
   MERMAID PLACEHOLDER (Created by parseMarkdown)
   ───────────────────────────────────────────────────────────────────────────────── */
.mermaid-placeholder {
    background: var(--fd-bg-card);
    border: 1px solid var(--fd-border-subtle);
    border-radius: 16px;
    padding: 32px;
    min-height: 200px;
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 16px 0;
}

.mermaid-placeholder.mermaid-rendered {
    display: block;
    padding: 24px;
}

.mermaid-loading {
    color: var(--fd-text-secondary);
    font-size: 14px;
    font-family: 'Inter', -apple-system, sans-serif;
}


/* ─────────────────────────────────────────────────────────────────────────────────
   MERMAID BASE STYLES
   ───────────────────────────────────────────────────────────────────────────────── */
.mermaid {
    background: transparent !important;
    width: 100%;
}

.mermaid svg {
    max-width: 100%;
    height: auto;
    background: transparent !important;
}


/* ─────────────────────────────────────────────────────────────────────────────────
   NODES - Large, rounded, premium feel with shadows
   ───────────────────────────────────────────────────────────────────────────────── */
.mermaid .node rect,
.mermaid .node polygon {
    fill: #18181b !important;
    stroke: rgba(255, 255, 255, 0.1) !important;
    stroke-width: 1.5px !important;
    rx: 14px !important;
    ry: 14px !important;
    filter: drop-shadow(0 8px 24px rgba(0, 0, 0, 0.4)) !important;
}

.mermaid .node circle,
.mermaid .node ellipse {
    fill: #18181b !important;
    stroke: rgba(255, 255, 255, 0.1) !important;
    stroke-width: 1.5px !important;
    filter: drop-shadow(0 8px 24px rgba(0, 0, 0, 0.4)) !important;
}


/* ─────────────────────────────────────────────────────────────────────────────────
   NODE TEXT - Large and readable
   ───────────────────────────────────────────────────────────────────────────────── */
.mermaid .nodeLabel,
.mermaid .node text,
.mermaid .label text {
    fill: #fafafa !important;
    font-family: 'Inter', -apple-system, sans-serif !important;
    font-size: 15px !important;
    font-weight: 600 !important;
}

.mermaid .nodeLabel {
    color: #fafafa !important;
    font-size: 15px !important;
    font-weight: 600 !important;
}

.mermaid foreignObject > div,
.mermaid foreignObject div {
    color: #fafafa !important;
    font-size: 15px !important;
    font-weight: 600 !important;
    font-family: 'Inter', -apple-system, sans-serif !important;
    line-height: 1.5 !important;
    padding: 8px 12px !important;
}


/* ─────────────────────────────────────────────────────────────────────────────────
   CLUSTERS/SUBGRAPHS - Subtle, elegant
   ───────────────────────────────────────────────────────────────────────────────── */
.mermaid .cluster rect {
    fill: rgba(255, 255, 255, 0.02) !important;
    stroke: rgba(255, 255, 255, 0.05) !important;
    stroke-width: 1px !important;
    rx: 20px !important;
    ry: 20px !important;
}

.mermaid .cluster text,
.mermaid .cluster span {
    fill: #52525b !important;
    color: #52525b !important;
    font-size: 12px !important;
    font-weight: 700 !important;
    text-transform: uppercase !important;
    letter-spacing: 2px !important;
}


/* ─────────────────────────────────────────────────────────────────────────────────
   EDGES/LINES - Smooth, visible
   ───────────────────────────────────────────────────────────────────────────────── */
.mermaid .edgePath path,
.mermaid .flowchart-link,
.mermaid path.path {
    stroke: #3f3f46 !important;
    stroke-width: 2px !important;
    stroke-linecap: round !important;
}

.mermaid marker path {
    fill: #3f3f46 !important;
    stroke: #3f3f46 !important;
}


/* ─────────────────────────────────────────────────────────────────────────────────
   EDGE LABELS - Clear background
   ───────────────────────────────────────────────────────────────────────────────── */
.mermaid .edgeLabel {
    background-color: #09090b !important;
    padding: 8px 14px !important;
    border-radius: 8px !important;
}

.mermaid .edgeLabel rect {
    fill: #09090b !important;
    stroke: none !important;
    rx: 8px !important;
    opacity: 1 !important;
}

.mermaid .edgeLabel text,
.mermaid .edgeLabel span,
.mermaid .edgeLabel foreignObject div {
    fill: #71717a !important;
    color: #71717a !important;
    font-size: 13px !important;
    font-weight: 600 !important;
    background: transparent !important;
}


/* ─────────────────────────────────────────────────────────────────────────────────
   SEQUENCE DIAGRAM - Extra large, very readable
   ───────────────────────────────────────────────────────────────────────────────── */
.mermaid .actor {
    fill: #18181b !important;
    stroke: rgba(255, 255, 255, 0.12) !important;
    stroke-width: 2px !important;
    rx: 16px !important;
    filter: drop-shadow(0 8px 24px rgba(0, 0, 0, 0.4)) !important;
}

.mermaid .actor-line {
    stroke: #27272a !important;
    stroke-width: 2px !important;
    stroke-dasharray: 8 6 !important;
}

/* Actor text - HUGE */
.mermaid text.actor {
    fill: #fafafa !important;
    font-size: 18px !important;
    font-weight: 700 !important;
    font-family: 'Inter', -apple-system, sans-serif !important;
}

/* Message lines */
.mermaid .messageLine0,
.mermaid .messageLine1 {
    stroke: #52525b !important;
    stroke-width: 2px !important;
}

/* Message text - LARGE */
.mermaid .messageText {
    fill: #e4e4e7 !important;
    font-size: 16px !important;
    font-weight: 600 !important;
    font-family: 'Inter', -apple-system, sans-serif !important;
}

/* Sequence numbers */
.mermaid .sequenceNumber {
    fill: #fafafa !important;
    font-size: 14px !important;
    font-weight: 700 !important;
}

/* Activation boxes */
.mermaid rect.activation0,
.mermaid rect.activation1,
.mermaid rect.activation2 {
    fill: #1f1f23 !important;
    stroke: rgba(255, 255, 255, 0.1) !important;
    stroke-width: 1.5px !important;
    rx: 8px !important;
}

/* Notes - LARGE */
.mermaid .note {
    fill: #18181b !important;
    stroke: rgba(255, 255, 255, 0.1) !important;
    stroke-width: 1.5px !important;
    rx: 14px !important;
    filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.3)) !important;
}

.mermaid .noteText {
    fill: #a1a1aa !important;
    font-size: 15px !important;
    font-weight: 500 !important;
    font-family: 'Inter', -apple-system, sans-serif !important;
}

/* Loop/Alt boxes */
.mermaid .loopText,
.mermaid .loopText tspan {
    fill: #71717a !important;
    font-size: 14px !important;
    font-weight: 600 !important;
}

.mermaid .loopLine {
    stroke: #3f3f46 !important;
    stroke-width: 1.5px !important;
}

.mermaid .labelBox {
    fill: #18181b !important;
    stroke: rgba(255, 255, 255, 0.08) !important;
}

.mermaid .labelText,
.mermaid .labelText tspan {
    fill: #71717a !important;
    font-size: 14px !important;
    font-weight: 600 !important;
}


/* ─────────────────────────────────────────────────────────────────────────────────
   STATE DIAGRAM - Transparent transition labels
   ───────────────────────────────────────────────────────────────────────────────── */
.mermaid .stateGroup rect,
.mermaid g.stateGroup rect {
    fill: #18181b !important;
    stroke: rgba(255, 255, 255, 0.1) !important;
    stroke-width: 1.5px !important;
    rx: 14px !important;
    filter: drop-shadow(0 8px 24px rgba(0, 0, 0, 0.4)) !important;
}

.mermaid .stateGroup text,
.mermaid g.stateGroup text {
    fill: #fafafa !important;
    font-size: 15px !important;
    font-weight: 600 !important;
}

/* State transitions - TRANSPARENT BACKGROUND */
.mermaid .transition {
    stroke: #3f3f46 !important;
    stroke-width: 2px !important;
}

.mermaid .stateLabel .box {
    fill: transparent !important;
    stroke: none !important;
}

.mermaid .stateLabel text {
    fill: #71717a !important;
    font-size: 13px !important;
    font-weight: 500 !important;
}

/* Transition labels - NO BACKGROUND - IMPORTANT */
.mermaid g.edgeLabel rect,
.mermaid .statediagram-state .edgeLabel rect,
.mermaid [id*="state"] .edgeLabel rect,
.mermaid .stateDiagram .edgeLabel rect,
.mermaid .stateDiagram-v2 .edgeLabel rect {
    fill: transparent !important;
    stroke: none !important;
    opacity: 0 !important;
}

.mermaid [id*="state"] .edgeLabel text,
.mermaid .stateDiagram .edgeLabel text,
.mermaid .stateDiagram-v2 .edgeLabel text {
    fill: #71717a !important;
    font-size: 13px !important;
    font-weight: 500 !important;
}

/* Start/End states */
.mermaid .start-state circle {
    fill: #3f3f46 !important;
    stroke: #52525b !important;
    stroke-width: 2px !important;
}

.mermaid .end-state-outer circle {
    fill: transparent !important;
    stroke: #52525b !important;
    stroke-width: 2px !important;
}

.mermaid .end-state-inner circle {
    fill: #71717a !important;
}


/* ─────────────────────────────────────────────────────────────────────────────────
   ER DIAGRAM - Modern cards
   ───────────────────────────────────────────────────────────────────────────────── */
.mermaid .entityBox {
    fill: #18181b !important;
    stroke: rgba(255, 255, 255, 0.1) !important;
    stroke-width: 1.5px !important;
    filter: drop-shadow(0 8px 24px rgba(0, 0, 0, 0.4)) !important;
}

.mermaid .entityLabel {
    fill: #fafafa !important;
    font-size: 16px !important;
    font-weight: 700 !important;
}

.mermaid .attributeBoxOdd,
.mermaid .attributeBoxEven {
    fill: #18181b !important;
    stroke: none !important;
}

.mermaid g.attribute text {
    fill: #a1a1aa !important;
    font-size: 13px !important;
    font-weight: 500 !important;
}

.mermaid .relationshipLine {
    stroke: #3f3f46 !important;
    stroke-width: 2px !important;
}

.mermaid .relationshipLabelBox {
    fill: #09090b !important;
}

.mermaid .relationshipLabel {
    fill: #71717a !important;
    font-size: 13px !important;
    font-weight: 600 !important;
}


/* ─────────────────────────────────────────────────────────────────────────────────
   GANTT CHART
   ───────────────────────────────────────────────────────────────────────────────── */
.mermaid .grid .tick line {
    stroke: #1f1f23 !important;
}

.mermaid .grid .tick text {
    fill: #52525b !important;
    font-size: 12px !important;
    font-weight: 500 !important;
}

.mermaid g.section rect {
    fill: rgba(255, 255, 255, 0.02) !important;
}

.mermaid .sectionTitle {
    fill: #e4e4e7 !important;
    font-size: 14px !important;
    font-weight: 600 !important;
}

.mermaid .task {
    fill: #18181b !important;
    stroke: rgba(255, 255, 255, 0.08) !important;
    stroke-width: 1.5px !important;
    rx: 10px !important;
    filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.3)) !important;
}

.mermaid .taskText {
    fill: #fafafa !important;
    font-size: 13px !important;
    font-weight: 600 !important;
}

.mermaid .taskTextOutsideRight {
    fill: #71717a !important;
}

/* Done tasks - green border */
.mermaid .done0,
.mermaid .done1,
.mermaid .done2,
.mermaid .done3 {
    fill: #18181b !important;
    stroke: #22c55e !important;
    stroke-width: 2px !important;
}

/* Active tasks - orange border */
.mermaid .active0,
.mermaid .active1,
.mermaid .active2,
.mermaid .active3 {
    fill: #18181b !important;
    stroke: #f97316 !important;
    stroke-width: 2px !important;
}

/* Milestones */
.mermaid .milestone {
    fill: #f97316 !important;
    stroke: #f97316 !important;
}

.mermaid .milestoneText {
    fill: #fafafa !important;
}


/* ─────────────────────────────────────────────────────────────────────────────────
   ERROR DISPLAY
   ───────────────────────────────────────────────────────────────────────────────── */
.fd-diagram-error {
    background: rgba(249, 115, 22, 0.1);
    border: 1px solid rgba(249, 115, 22, 0.3);
    border-radius: 12px;
    padding: 16px;
    font-size: 13px;
    font-family: 'Inter', -apple-system, sans-serif;
    color: var(--fd-accent-orange);
}

.fd-diagram-error strong {
    display: block;
    margin-bottom: 8px;
}

.fd-diagram-error small {
    color: var(--fd-text-secondary);
}


/* ─────────────────────────────────────────────────────────────────────────────────
   RESPONSIVE
   ───────────────────────────────────────────────────────────────────────────────── */
@media (max-width: 768px) {
    .mermaid-placeholder {
        padding: 16px;
        border-radius: 12px;
        min-height: 150px;
    }
    
    .mermaid-placeholder.mermaid-rendered {
        padding: 16px;
    }
}