/* ============================================
   HADRON COLLIDER LAB — HUD / Sci-Fi FUI Theme
   ============================================ */

:root {
    --bg-deep: #0a0a1a;
    --bg-panel: rgba(10, 15, 30, 0.88);
    --border-cyan: rgba(0, 255, 255, 0.15);
    --border-cyan-bright: rgba(0, 255, 255, 0.4);
    --cyan: #00ffff;
    --cyan-dim: #00aaaa;
    --orange: #ff6600;
    --orange-glow: rgba(255, 102, 0, 0.4);
    --text-main: #e0e8f0;
    --text-muted: #6a7a8a;
    --text-bright: #ffffff;

    /* Particle colors */
    --p-photon: #ffd700;
    --p-electron: #00bfff;
    --p-muon: #00ff88;
    --p-quark: #ff4444;
    --p-neutrino: #aa66ff;
    --p-wz: #ff00ff;
    --p-higgs: #fffacd;
    --p-gluon: #ff8800;
    --p-tau: #00ccaa;

    --font-hud: 'Share Tech Mono', monospace;
    --font-data: 'Fira Code', monospace;

    --panel-left-w: 220px;
    --panel-right-w: 280px;
    --hud-h: 44px;
    --controls-h: 56px;
}

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

body {
    background: var(--bg-deep);
    color: var(--text-main);
    font-family: var(--font-hud);
    overflow: hidden;
    width: 100vw;
    height: 100vh;
}

/* ---- HUD Top Bar ---- */
#hud-bar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--hud-h);
    background: var(--bg-panel);
    border-bottom: 1px solid var(--border-cyan);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    z-index: 100;
}

.hud-title {
    font-size: 16px;
    letter-spacing: 4px;
    color: var(--cyan);
    text-shadow: 0 0 10px rgba(0, 255, 255, 0.5);
}

.hud-stats {
    display: flex;
    gap: 24px;
    font-family: var(--font-data);
    font-size: 12px;
    color: var(--text-muted);
}

.hud-stats span {
    padding: 2px 8px;
    border: 1px solid var(--border-cyan);
    border-radius: 2px;
}

/* ---- Left Panel: Presets ---- */
#preset-panel {
    position: fixed;
    top: var(--hud-h);
    left: 0;
    bottom: var(--controls-h);
    width: var(--panel-left-w);
    background: var(--bg-panel);
    border-right: 1px solid var(--border-cyan);
    padding: 16px;
    z-index: 90;
    overflow-y: auto;
}

#preset-panel h2 {
    font-size: 11px;
    letter-spacing: 3px;
    color: var(--cyan-dim);
    margin-bottom: 16px;
}

.preset-card {
    background: rgba(0, 255, 255, 0.03);
    border: 1px solid var(--border-cyan);
    border-radius: 4px;
    padding: 10px 12px;
    margin-bottom: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.preset-card:hover {
    border-color: var(--border-cyan-bright);
    background: rgba(0, 255, 255, 0.06);
}

.preset-card.active {
    border-color: var(--cyan);
    background: rgba(0, 255, 255, 0.08);
    box-shadow: 0 0 12px rgba(0, 255, 255, 0.15);
}

.preset-name {
    font-size: 13px;
    color: var(--text-bright);
    margin-bottom: 4px;
}

.preset-desc {
    font-size: 10px;
    color: var(--text-muted);
    line-height: 1.4;
}

.preset-energy {
    font-family: var(--font-data);
    font-size: 10px;
    color: var(--cyan-dim);
    margin-top: 4px;
}

/* ---- Right Panel: Particle Info ---- */
#info-panel {
    position: fixed;
    top: var(--hud-h);
    right: 0;
    bottom: var(--controls-h);
    width: var(--panel-right-w);
    background: var(--bg-panel);
    border-left: 1px solid var(--border-cyan);
    padding: 16px;
    z-index: 90;
    overflow-y: auto;
}

#info-panel h2 {
    font-size: 11px;
    letter-spacing: 3px;
    color: var(--cyan-dim);
    margin-bottom: 16px;
}

.particle-entry {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 8px;
    margin-bottom: 4px;
    border-radius: 3px;
    font-size: 12px;
    cursor: pointer;
    transition: background 0.15s;
}

.particle-entry:hover {
    background: rgba(255, 255, 255, 0.05);
}

.particle-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
}

.particle-symbol {
    font-family: var(--font-data);
    color: var(--text-bright);
    min-width: 30px;
}

.particle-label {
    color: var(--text-muted);
    font-size: 11px;
}

#particle-detail {
    margin-top: 20px;
    padding-top: 16px;
    border-top: 1px solid var(--border-cyan);
}

#particle-detail h3 {
    font-size: 14px;
    color: var(--cyan);
    margin-bottom: 12px;
}

.detail-grid {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.detail-row {
    display: flex;
    justify-content: space-between;
    font-size: 12px;
}

.detail-row .label {
    color: var(--text-muted);
}

.detail-row span:last-child {
    font-family: var(--font-data);
    color: var(--text-bright);
}

.hidden {
    display: none !important;
}

/* ---- 3D Canvas ---- */
#canvas-container {
    position: fixed;
    top: var(--hud-h);
    left: var(--panel-left-w);
    right: var(--panel-right-w);
    bottom: var(--controls-h);
    z-index: 1;
}

#canvas-container canvas {
    width: 100% !important;
    height: 100% !important;
}

/* ---- Bottom Controls ---- */
#controls-bar {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: var(--controls-h);
    background: var(--bg-panel);
    border-top: 1px solid var(--border-cyan);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 0 20px;
    z-index: 100;
}

.btn-primary {
    font-family: var(--font-hud);
    font-size: 14px;
    letter-spacing: 3px;
    padding: 8px 28px;
    background: var(--orange);
    color: var(--text-bright);
    border: none;
    border-radius: 3px;
    cursor: pointer;
    transition: all 0.2s;
    box-shadow: 0 0 16px var(--orange-glow);
}

.btn-primary:hover {
    background: #ff7722;
    box-shadow: 0 0 24px var(--orange-glow);
}

.btn-primary:active {
    transform: scale(0.97);
}

.btn-primary.running {
    background: #cc5500;
    box-shadow: none;
    pointer-events: none;
    opacity: 0.6;
}

.btn-ctrl {
    font-family: var(--font-hud);
    font-size: 12px;
    padding: 6px 14px;
    background: transparent;
    color: var(--text-muted);
    border: 1px solid var(--border-cyan);
    border-radius: 3px;
    cursor: pointer;
    transition: all 0.15s;
}

.btn-ctrl:hover {
    color: var(--cyan);
    border-color: var(--border-cyan-bright);
}

.btn-ctrl.active {
    color: var(--cyan);
    border-color: var(--cyan);
}

.speed-control {
    display: flex;
    gap: 4px;
}

.btn-speed {
    font-family: var(--font-data);
    font-size: 10px;
    padding: 4px 8px;
    background: transparent;
    color: var(--text-muted);
    border: 1px solid transparent;
    border-radius: 2px;
    cursor: pointer;
    transition: all 0.15s;
}

.btn-speed:hover {
    color: var(--text-main);
}

.btn-speed.active {
    color: var(--cyan);
    border-color: var(--border-cyan-bright);
}

#speed-slider {
    width: 100px;
    accent-color: var(--cyan);
    cursor: pointer;
}

#speed-display {
    font-family: var(--font-data);
    font-size: 12px;
    color: var(--cyan);
    min-width: 44px;
    text-align: center;
}

/* ---- Scrollbar ---- */
::-webkit-scrollbar {
    width: 4px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--border-cyan-bright);
    border-radius: 2px;
}

/* ---- Particle 3D Labels (CSS2DRenderer) ---- */
.particle-label-3d {
    font-family: 'Fira Code', monospace;
    font-size: 11px;
    font-weight: 600;
    padding: 0;
    white-space: nowrap;
    pointer-events: none;
    background: none;
    border: none;
    text-shadow: 0 0 4px currentColor, 0 0 8px currentColor, 0 0 16px currentColor;
    transform: translate(10px, -50%);
    line-height: 1;
}

/* ---- Beam proton labels ---- */
.beam-label-3d {
    font-family: 'Share Tech Mono', monospace;
    font-size: 14px;
    font-weight: 700;
    color: #ffffff;
    padding: 0;
    white-space: nowrap;
    pointer-events: none;
    background: none;
    border: none;
    text-shadow: 0 0 6px #ffffff, 0 0 12px #ffffff, 0 0 24px rgba(100,200,255,0.6);
    transform: translate(14px, -50%);
    line-height: 1;
}

/* ---- Event Log Panel ---- */
#event-log {
    position: fixed;
    bottom: calc(var(--controls-h) + 12px);
    right: calc(var(--panel-right-w) + 12px);
    width: 320px;
    max-height: 260px;
    background: rgba(6, 8, 18, 0.88);
    border: 1px solid rgba(0, 255, 255, 0.12);
    border-radius: 4px;
    z-index: 50;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.log-header {
    font-size: 10px;
    letter-spacing: 3px;
    color: var(--cyan-dim);
    padding: 6px 10px;
    border-bottom: 1px solid rgba(0, 255, 255, 0.08);
    flex-shrink: 0;
}

#log-entries {
    flex: 1;
    overflow-y: auto;
    padding: 4px 0;
    scroll-behavior: smooth;
}

.log-entry {
    display: flex;
    gap: 8px;
    padding: 3px 10px;
    font-size: 11px;
    line-height: 1.4;
    animation: logFadeIn 0.3s ease;
}

@keyframes logFadeIn {
    from { opacity: 0; transform: translateY(4px); }
    to   { opacity: 1; transform: translateY(0); }
}

.log-time {
    font-family: var(--font-data);
    color: var(--text-muted);
    flex-shrink: 0;
    min-width: 52px;
    font-size: 10px;
}

.log-msg {
    color: var(--text-main);
}

/* Log entry types */
.log-entry.countdown .log-msg {
    color: var(--orange);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 1px;
}

.log-entry.collision .log-msg {
    color: #ffffff;
    font-weight: 600;
    text-shadow: 0 0 6px rgba(255, 255, 255, 0.5);
}

.log-entry.beam .log-msg {
    color: rgba(255, 255, 255, 0.7);
}

.log-entry.decay .log-msg {
    color: var(--cyan);
}

.log-entry.detect .log-msg {
    color: var(--p-muon);
}

.log-entry.particle .log-msg {
    color: var(--text-main);
}

.log-entry.energy .log-msg {
    color: var(--p-photon);
}

.log-entry.system .log-msg {
    color: var(--text-muted);
    font-style: italic;
}

.log-color-dot {
    display: inline-block;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    margin-right: 3px;
    vertical-align: middle;
}

/* ---- Detector Layer Labels ---- */
.detector-layer-label {
    font-family: 'Share Tech Mono', monospace;
    display: flex;
    flex-direction: column;
    align-items: center;
    pointer-events: none;
    line-height: 1.2;
    background: none;
    border: none;
    padding: 0;
}

.detector-layer-label .layer-abbr {
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 2px;
    text-shadow: 0 0 6px currentColor;
    opacity: 0.7;
}

.detector-layer-label .layer-full {
    font-size: 8px;
    opacity: 0.4;
}

/* ---- Copyright ---- */
#copyright {
    position: fixed;
    bottom: calc(var(--controls-h) + 8px);
    left: calc(var(--panel-left-w) + 12px);
    z-index: 50;
}

#copyright a {
    font-family: var(--font-hud);
    font-size: 10px;
    letter-spacing: 1px;
    color: var(--text-muted);
    text-decoration: none;
    opacity: 0.6;
    transition: opacity 0.2s, color 0.2s;
}

#copyright a:hover {
    opacity: 1;
    color: var(--cyan-dim);
}

/* ---- Scanline overlay (subtle) ---- */
#canvas-container::after {
    content: '';
    position: absolute;
    inset: 0;
    pointer-events: none;
    background: repeating-linear-gradient(
        0deg,
        transparent,
        transparent 2px,
        rgba(0, 255, 255, 0.008) 2px,
        rgba(0, 255, 255, 0.008) 4px
    );
    z-index: 2;
}