:root {
    --bg-dark: #0f111a;
    --bg-panel: rgba(25, 28, 41, 0.6);
    --border-glass: rgba(255, 255, 255, 0.08);
    --text-main: #f0f2f5;
    --text-muted: #9ba1a6;
    --accent-glow: rgba(99, 102, 241, 0.5);
    
    --prof-expert: #10b981;
    --prof-intermediate: #f59e0b;
    --prof-beginner: #3b82f6;
    --prof-none: #374151;

    --font-family: 'Outfit', sans-serif;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-family);
    background-color: var(--bg-dark);
    color: var(--text-main);
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

/* Background Effects */
.background-effects {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    z-index: -1;
    overflow: hidden;
    pointer-events: none;
}

.glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.5;
}

.glow-1 {
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
    top: -200px;
    left: -100px;
    animation: drift 15s infinite alternate ease-in-out;
}

.glow-2 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(236, 72, 153, 0.3) 0%, transparent 70%);
    bottom: -150px;
    right: -100px;
    animation: drift 20s infinite alternate-reverse ease-in-out;
}

@keyframes drift {
    from { transform: translate(0, 0); }
    to { transform: translate(50px, 50px); }
}

.app-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
}

.header-content h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, #fff, #a5b4fc);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.header-content p {
    color: var(--text-muted);
    font-size: 1.1rem;
}

.legend {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-main);
}

.legend-square {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: bold;
}

/* Glass Panel */
.glass-panel {
    background: var(--bg-panel);
    border: 1px solid var(--border-glass);
    border-radius: 16px;
    backdrop-filter: blur(16px);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
    overflow: hidden;
}

.matrix-container {
    display: block;
    min-width: max-content;
}

/* Transposed Grid Layout */
.matrix-table {
    display: grid;
    /* First column is sticky Member name. Subsequent columns are fixed width for skills */
    grid-template-columns: 250px repeat(var(--skill-count), var(--cell-width, 98px));
    border-collapse: separate;
}

.matrix-row {
    display: contents;
}

.matrix-row:hover > div {
    background: rgba(255, 255, 255, 0.04);
}

/* Top Super-Header for Workstations */
.ws-header {
    grid-column: span var(--ws-span);
    text-align: center;
    padding: 0.5rem;
    background: rgba(255, 255, 255, 0.05);
    border-right: 1px solid var(--border-glass);
    border-bottom: 1px solid var(--border-glass);
    font-weight: 600;
    color: #fff;
    white-space: normal;
    word-break: break-word;
    overflow: hidden;
    z-index: 5;
}

/* Vertical Headers for Skills */
.skill-header {
    writing-mode: vertical-rl;
    transform: rotate(180deg);
    padding: 1rem 0.5rem;
    text-align: left;
    height: 200px;
    background: rgba(255, 255, 255, 0.02);
    border-right: 1px solid var(--border-glass);
    border-bottom: 1px solid var(--border-glass);
    font-size: 0.85rem;
    color: var(--text-muted);
    white-space: normal;
    word-break: break-word;
    overflow: hidden;
    z-index: 5;
}

/* Sticky Member Name Column */
.member-cell {
    position: sticky;
    left: 0;
    background: #1a1d2d; /* Solid color so it hides scrolling content */
    z-index: 50;
    padding: 0.75rem 1rem;
    border-right: 1px solid var(--border-glass);
    border-bottom: 1px solid var(--border-glass);
    font-weight: 500;
    display: flex;
    align-items: center;
}

/* Header corner */
.corner-cell {
    position: sticky;
    left: 0;
    top: 0;
    z-index: 100;
    background: #1a1d2d;
    border-right: 1px solid var(--border-glass);
    border-bottom: 1px solid var(--border-glass);
    display: flex;
    align-items: flex-end;
    justify-content: flex-start;
    padding: 1rem;
    font-size: 1rem;
}

/* Indicator Squares */
.data-cell {
    padding: 0.25rem;
    border-right: 1px solid var(--border-glass);
    border-bottom: 1px solid var(--border-glass);
    display: flex;
    align-items: center;
    justify-content: center;
}

.prof-indicator {
    width: 100%;
    height: 100%;
    min-height: 35px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    color: #fff;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    user-select: none;
    position: relative;
}

.prof-indicator:hover {
    filter: brightness(1.15);
    transform: scale(1.08);
    z-index: 20;
    box-shadow: 0 4px 12px rgba(0,0,0,0.3);
}

.prof-indicator:active {
    transform: scale(0.95);
}

/* Heatmap Mode Overrides */
.matrix-table.heatmap-mode .data-cell {
    padding: 0;
}

.matrix-table.heatmap-mode .prof-indicator {
    border-radius: 0;
    color: transparent; /* Hide text */
    min-height: 50px; /* Ensure full cell height if empty */
    border: none;
}

/* CSS Tooltips */
.prof-indicator::after {
    content: '';
    position: absolute;
    bottom: 120%;
    left: 50%;
    transform: translateX(-50%) translateY(10px);
    background: rgba(15, 17, 26, 0.95);
    color: white;
    padding: 0.4rem 0.6rem;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 500;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    pointer-events: none;
    border: 1px solid rgba(255,255,255,0.1);
}

.prof-indicator:hover::after {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.prof-indicator.level-1::after { content: 'Level 1: Novice'; }
.prof-indicator.level-2::after { content: 'Level 2: Basic'; }
.prof-indicator.level-3::after { content: 'Level 3: Intermediate'; }
.prof-indicator.level-4::after { content: 'Level 4: Expert'; }
.prof-indicator.level-none::after { content: 'Not Assessed'; }

/* Map 1,2,3,4 colors to match requested palette */
.prof-indicator.level-1 { background: #ba3f3e; color: #ffffff; } /* Deep Red */
.prof-indicator.level-2 { background: #fbcca1; color: #901a35; } /* Peach */
.prof-indicator.level-3 { background: #aee2cc; color: #901a35; } /* Light Mint */
.prof-indicator.level-4 { background: #5da98a; color: #ffffff; } /* Muted Teal */
.prof-indicator.level-none { background: rgba(255,255,255,0.05); color: transparent; }

.hidden { display: none; }