/* =============================================
   PION MECHANICAL DISTRIBUTION - LFQM WALLPAPER
   ============================================= */

:root {
    --bg-primary: #06060f;
    --bg-secondary: #0c0c1e;
    --glass-bg: rgba(12, 12, 35, 0.65);
    --glass-border: rgba(120, 120, 255, 0.12);
    --glass-shadow: rgba(0, 0, 0, 0.4);
    --text-primary: #e8e8f4;
    --text-secondary: rgba(200, 200, 230, 0.7);
    --text-dim: rgba(160, 160, 200, 0.45);
    --accent-warm: #ff6b4a;
    --accent-cool: #4ac8ff;
    --accent-gold: #ffcf48;
    --accent-violet: #a78bfa;
    --accent-green: #34d399;
    --glow-warm: rgba(255, 107, 74, 0.3);
    --glow-cool: rgba(74, 200, 255, 0.3);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    cursor: none;
}

html, body {
    width: 100%;
    height: 100%;
    overflow: hidden;
    background: var(--bg-primary);
    font-family: 'Inter', 'Outfit', sans-serif;
    color: var(--text-primary);
    -webkit-font-smoothing: antialiased;
}

/* ========== CANVASES ========== */
#bg-canvas, #physics-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

#bg-canvas { z-index: 0; }
#physics-canvas { z-index: 1; }

/* ========== GLASSMORPHISM CARDS ========== */
.glass-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    box-shadow: 0 8px 32px var(--glass-shadow),
                inset 0 1px 0 rgba(255, 255, 255, 0.04);
    transition: opacity 0.4s ease, transform 0.4s ease;
}

/* ========== UI OVERLAY ========== */
.ui-overlay {
    position: fixed;
    inset: 0;
    z-index: 10;
    pointer-events: none;
    transition: opacity 0.5s ease;
}

.ui-overlay > * {
    pointer-events: auto;
}

.ui-overlay.hidden > *:not(.toggle-ui):not(.fullscreen-btn) {
    opacity: 0;
    pointer-events: none;
    transform: translateY(10px);
}

/* ========== TITLE BAR ========== */
.title-bar {
    position: absolute;
    top: 28px;
    left: 50%;
    transform: translateX(-50%);
    padding: 16px 36px;
    text-align: center;
}

.title-bar h1 {
    font-family: 'Outfit', sans-serif;
    font-size: 1.5rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    background: linear-gradient(135deg, var(--accent-warm), var(--accent-gold), var(--accent-cool));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.title-bar .subtitle {
    font-size: 0.78rem;
    color: var(--text-secondary);
    margin-top: 4px;
    font-weight: 300;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

/* ========== PARAMETERS PANEL ========== */
.params-panel {
    position: absolute;
    top: 120px;
    left: 28px;
    width: 260px;
    padding: 20px;
}

.panel-title {
    font-family: 'Outfit', sans-serif;
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--accent-cool);
    margin-bottom: 16px;
}

.control-group {
    margin-bottom: 14px;
}

.control-group label {
    display: block;
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: 6px;
    font-family: 'JetBrains Mono', monospace;
}

.slider-row {
    display: flex;
    align-items: center;
    gap: 10px;
}

.slider-value {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    color: var(--accent-gold);
    min-width: 44px;
    text-align: right;
}

input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    flex: 1;
    height: 4px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 2px;
    outline: none;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--accent-cool);
    box-shadow: 0 0 8px var(--glow-cool);
    cursor: none;
}

.param-readouts {
    margin-top: 18px;
    padding-top: 14px;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.readout {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 0;
}

.readout-label {
    font-size: 0.95rem;
    color: var(--text-secondary);
    font-family: 'JetBrains Mono', monospace;
}

.readout-val {
    font-size: 1.15rem;
    color: var(--accent-gold);
    font-family: 'JetBrains Mono', monospace;
    font-weight: 600;
}

/* ========== EQUATION PANEL ========== */
.equation-panel {
    position: absolute;
    bottom: 28px;
    left: 50%;
    transform: translateX(-50%);
    padding: 16px 32px;
    text-align: center;
}

.eq-line {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
    color: var(--text-primary);
    margin: 8px 0;
    white-space: nowrap;
}

.eq-line.small {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.eq-frac {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    vertical-align: middle;
    margin: 0 3px;
}

.eq-num {
    border-bottom: 1px solid var(--text-dim);
    padding-bottom: 1px;
    font-size: 0.85em;
}

.eq-den {
    padding-top: 1px;
    font-size: 0.85em;
}

.eq-paren {
    font-size: 1.2em;
    color: var(--text-dim);
}

.vonlaue {
    color: var(--accent-green) !important;
}

.vonlaue-badge {
    display: inline-block;
    background: rgba(52, 211, 153, 0.12);
    border: 1px solid rgba(52, 211, 153, 0.3);
    border-radius: 8px;
    padding: 2px 10px;
    font-size: 0.65rem;
    margin-left: 8px;
    color: var(--accent-green);
    letter-spacing: 0.05em;
}

/* ========== LEGEND ========== */
.legend-panel {
    position: absolute;
    bottom: 330px;
    right: 40px;
    padding: 16px 20px;
    min-width: 200px;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.7rem;
    color: var(--text-secondary);
    padding: 3px 0;
    font-family: 'JetBrains Mono', monospace;
}

.legend-color {
    width: 10px;
    height: 10px;
    border-radius: 3px;
    flex-shrink: 0;
}

/* ========== BUTTONS ========== */
.toggle-ui, .fullscreen-btn {
    position: absolute;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    border: none;
    cursor: none;
    transition: all 0.3s ease;
}

.toggle-ui:hover, .fullscreen-btn:hover {
    color: var(--accent-cool);
    border-color: rgba(74, 200, 255, 0.25);
}

.toggle-ui {
    bottom: 28px;
    left: 28px;
}

.fullscreen-btn {
    bottom: 28px;
    left: 80px;
}

/* ========== ANIMATIONS ========== */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
}

.glass-card {
    animation: fadeIn 0.8s ease forwards;
}

.params-panel { animation-delay: 0.1s; }
.equation-panel { animation-delay: 0.2s; }
.legend-panel { animation-delay: 0.3s; }

/* ========== SCROLLBAR ========== */
::-webkit-scrollbar { display: none; }