/* ============================================
   α_s(Q²) RUNNING COUPLING WALLPAPER
   Design System
   ============================================ */

:root {
    --bg-void: #030308;
    --confinement: #ff2244;
    --freedom: #22aaff;
    --landau: #ff6622;
    --threshold-c: #ffaa33;
    --threshold-b: #33ddaa;
    --threshold-t: #aa66ff;
    --mz-color: #44ccff;
    --plot-glow: rgba(68, 200, 255, 0.25);
    --accent-1: #44ccff;
    --accent-2: #ff4466;
    --accent-warm: #ff6633;
    --accent-cool: #3388ff;
    --text-primary: rgba(230, 240, 255, 0.92);
    --text-secondary: rgba(140, 170, 210, 0.45);
    --text-accent: #44ccff;
    --text-warm: #ff8855;
    --glass-bg: rgba(8, 12, 30, 0.6);
    --glass-border: rgba(68, 140, 255, 0.07);
    --glass-shadow: rgba(0, 0, 0, 0.6);
    --font-display: 'Space Grotesk', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
}

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

html, body {
    width: 100%; height: 100%;
    overflow: hidden;
    background: var(--bg-void);
    font-family: var(--font-display);
    color: var(--text-primary);
    cursor: crosshair;
}

/* ============================================
   CANVASES
   ============================================ */

#bg-canvas, #plot-canvas, #fx-canvas {
    position: fixed; inset: 0;
    width: 100%; height: 100%;
    contain: strict;
}
#bg-canvas { z-index: 1; }
#plot-canvas { z-index: 2; }
#fx-canvas { z-index: 3; pointer-events: none; }

/* ============================================
   GLASS CARDS
   ============================================ */

.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(28px) saturate(1.3);
    -webkit-backdrop-filter: blur(28px) saturate(1.3);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    box-shadow: 0 6px 28px var(--glass-shadow),
                inset 0 1px 0 rgba(255, 255, 255, 0.025);
    transition: all 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.glass-card:hover {
    background: rgba(12, 18, 45, 0.65);
    border-color: rgba(68, 160, 255, 0.12);
    box-shadow: 0 10px 40px var(--glass-shadow),
                0 0 15px rgba(68, 160, 255, 0.05);
    transform: translateY(-1px);
}

/* ============================================
   UI OVERLAY
   ============================================ */

.ui-overlay {
    position: fixed; inset: 0; z-index: 100;
    pointer-events: none;
    transition: opacity 0.5s ease;
}
.ui-overlay > * { pointer-events: auto; }
.ui-overlay.hidden > *:not(.toggle-ui) {
    opacity: 0; transform: translateY(14px) scale(0.97); pointer-events: none;
}

/* ============================================
   TITLE CARD
   ============================================ */

.title-card {
    position: absolute;
    top: 28px;
    left: 50%;
    transform: translateX(-50%);
    padding: 12px 32px;
    text-align: center;
}

.title-main {
    font-family: var(--font-display);
    font-size: 1.6rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-warm), var(--accent-1), var(--accent-cool));
    background-size: 200% 200%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradShift 6s ease infinite;
}

.title-main sub {
    font-size: 0.9rem;
}

.title-sub {
    font-family: var(--font-mono);
    font-size: 0.55rem;
    color: var(--text-secondary);
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-top: 4px;
}

@keyframes gradShift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

/* ============================================
   VALUE DISPLAY
   ============================================ */

.value-display {
    position: absolute;
    top: 100px;
    left: 28px;
    padding: 18px 22px;
    width: 220px;
}

.val-header {
    display: flex; align-items: center; gap: 8px;
    margin-bottom: 14px;
    padding-bottom: 10px;
    border-bottom: 1px solid rgba(68, 140, 255, 0.06);
}

.pulse-dot {
    width: 6px; height: 6px; border-radius: 50%;
    background: var(--accent-1);
    box-shadow: 0 0 8px rgba(68, 204, 255, 0.35);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.4; transform: scale(0.7); }
}

.val-title {
    font-family: var(--font-display);
    font-size: 0.55rem; font-weight: 600;
    text-transform: uppercase; letter-spacing: 2px;
    color: var(--text-accent);
}

.val-main-row {
    display: flex; align-items: baseline; gap: 8px;
    margin-bottom: 14px;
}

.val-label {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.val-label sub { font-size: 0.55rem; }

.val-number {
    font-family: var(--font-mono);
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-accent);
    transition: color 0.5s ease;
}

.val-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}

.val-cell {
    display: flex; flex-direction: column; gap: 1px;
}

.val-key {
    font-family: var(--font-mono);
    font-size: 0.5rem; color: var(--text-secondary);
}
.val-key sub { font-size: 0.4rem; }

.val-data {
    font-family: var(--font-mono);
    font-size: 0.9rem; font-weight: 700;
    color: var(--text-accent);
}

.val-unit {
    font-family: var(--font-mono);
    font-size: 0.45rem; color: var(--text-secondary);
}

/* ============================================
   FORMULA CARD
   ============================================ */

.formula-card {
    position: absolute;
    bottom: 100px;
    left: 28px;
    padding: 16px 20px;
    width: 280px;
}

.formula-tabs {
    display: flex; gap: 4px; margin-bottom: 14px;
}

.formula-tab {
    flex: 1;
    padding: 5px 0;
    border: 1px solid transparent;
    border-radius: 6px;
    background: rgba(255, 255, 255, 0.02);
    color: var(--text-secondary);
    font-family: var(--font-mono);
    font-size: 0.55rem;
    cursor: pointer;
    transition: all 0.2s;
}

.formula-tab:hover {
    background: rgba(68, 140, 255, 0.05);
}

.formula-tab.active {
    background: rgba(68, 140, 255, 0.1);
    border-color: var(--accent-1);
    color: var(--text-accent);
}

.formula-display {
    text-align: center;
    padding: 8px 0;
}

.formula-text {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-primary);
    line-height: 2;
}

.formula-text sub { font-size: 0.6rem; }

.f-frac {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    vertical-align: middle;
    margin: 0 4px;
}

.f-num {
    border-bottom: 1px solid rgba(200, 220, 255, 0.4);
    padding: 0 6px 3px;
    font-size: 0.8rem;
}

.f-den {
    padding: 3px 6px 0;
    font-size: 0.7rem;
    color: rgba(200, 220, 255, 0.7);
}

.formula-note {
    font-family: var(--font-mono);
    font-size: 0.6rem;
    color: var(--text-secondary);
    margin-top: 8px;
}

/* ============================================
   CONTROLS
   ============================================ */

.controls-panel {
    position: absolute;
    top: 100px;
    right: 28px;
    padding: 20px;
    width: 250px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.control-group {
    display: flex; flex-direction: column; gap: 6px;
}

.control-group label {
    font-family: var(--font-display);
    font-size: 0.58rem; font-weight: 600;
    text-transform: uppercase; letter-spacing: 1.5px;
    color: var(--text-secondary);
}

.control-group label sub { font-size: 0.45rem; }

input[type="range"] {
    -webkit-appearance: none; appearance: none;
    width: 100%; height: 3px;
    background: rgba(68, 140, 255, 0.08);
    border-radius: 3px; outline: none; cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 13px; height: 13px; border-radius: 50%;
    background: var(--accent-1);
    box-shadow: 0 0 10px rgba(68, 204, 255, 0.35);
    transition: transform 0.2s;
}

input[type="range"]::-webkit-slider-thumb:hover { transform: scale(1.3); }

input[type="range"]::-moz-range-thumb {
    width: 13px; height: 13px; border-radius: 50%;
    background: var(--accent-1); border: none;
    box-shadow: 0 0 10px rgba(68, 204, 255, 0.35);
}

.slider-markers {
    display: flex;
    justify-content: space-between;
    font-family: var(--font-mono);
    font-size: 0.4rem;
    color: rgba(140, 170, 210, 0.3);
    margin-top: 2px;
}

.slider-markers sub { font-size: 0.35rem; }

/* ============================================
   REGION LABELS
   ============================================ */

.region-label {
    position: absolute;
    display: flex; flex-direction: column; gap: 3px;
    pointer-events: none;
}

.region-confinement {
    left: 15%;
    bottom: 42%;
}

.region-freedom {
    right: 12%;
    bottom: 25%;
}

.region-name {
    font-family: var(--font-display);
    font-size: 0.65rem; font-weight: 600;
    text-transform: uppercase; letter-spacing: 3px;
    opacity: 0.2;
}

.region-confinement .region-name { color: var(--confinement); }
.region-freedom .region-name { color: var(--freedom); }

.region-desc {
    font-family: var(--font-mono);
    font-size: 0.5rem;
    opacity: 0.15;
}

.region-confinement .region-desc { color: var(--confinement); }
.region-freedom .region-desc { color: var(--freedom); }

/* ============================================
   INFO BAR
   ============================================ */

.info-bar {
    position: absolute; bottom: 28px; left: 28px;
    display: flex; gap: 8px;
}

.widget {
    padding: 9px 14px;
    display: flex; flex-direction: column; align-items: center; gap: 2px;
    min-width: 60px;
}

.widget-label {
    font-family: var(--font-mono);
    font-size: 0.48rem; font-weight: 500;
    text-transform: uppercase; letter-spacing: 1.5px;
    color: var(--text-secondary);
}

.widget-value {
    font-family: var(--font-mono);
    font-size: 1rem; font-weight: 700;
    color: var(--text-accent);
}

/* ============================================
   BUTTONS
   ============================================ */

.toggle-ui {
    position: absolute; bottom: 28px; right: 28px;
    width: 40px; height: 40px;
    display: flex; align-items: center; justify-content: center;
    cursor: pointer; border: none; color: var(--text-primary); z-index: 200;
}
.toggle-ui:hover { color: var(--accent-1); }

.fullscreen-btn {
    position: absolute; bottom: 28px; right: 78px;
    width: 40px; height: 40px;
    display: flex; align-items: center; justify-content: center;
    cursor: pointer; border: none; color: var(--text-primary); z-index: 200;
}
.fullscreen-btn:hover { color: var(--accent-1); }

/* ============================================
   ENTRANCE
   ============================================ */

.glass-card { animation: enterCard 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94) both; }
.title-card { animation-delay: 0s; }
.value-display { animation-delay: 0.1s; }
.formula-card { animation-delay: 0.2s; }
.controls-panel { animation-delay: 0.3s; }

@keyframes enterCard {
    from { opacity: 0; transform: translateY(18px) scale(0.97); }
    to { opacity: 1; }
}

.clock-card { animation: none; }

/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 900px) {
    .value-display { top: 80px; left: 10px; width: 180px; }
    .controls-panel { top: auto; bottom: 100px; right: 10px; width: 200px; }
    .formula-card { bottom: 80px; left: 10px; width: 220px; }
    .title-main { font-size: 1.2rem; }
    .region-label { display: none; }
}