/* ═══════════════════════════════════════════════════
   BIG BANG — ORIGIN SIMULATION — css/bigbang.css
   ═══════════════════════════════════════════════════ */
:root {
    --bb-primary:  #f0c040;
    --bb-accent:   #ff8844;
    --bb-glow:     #ffaa22;
    --bb-cold:     #4488ff;
    --bb-bg:       #000000;
    --bb-surface:  rgba(240,192,64,0.06);
    --bb-border:   rgba(240,192,64,0.22);
    --bb-text:     #ede0d4;
    --bb-text-dim: rgba(237,224,212,0.50);
}
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html,body{width:100%;height:100vh;overflow:hidden;background:#000;color:var(--bb-text);font-family:'Inter',sans-serif;-webkit-font-smoothing:antialiased}

/* loading */
.bb-loading{position:fixed;inset:0;z-index:9999;display:flex;flex-direction:column;align-items:center;justify-content:center;background:#000;transition:opacity .6s,visibility .6s}
.bb-loading.bb-loading--hidden{opacity:0;visibility:hidden;pointer-events:none}
.bb-loading-core{position:relative;width:110px;height:110px;margin-bottom:28px}
.bb-loading-ring{position:absolute;inset:0;border-radius:50%;border:1.5px solid transparent}
.bb-loading-ring--1{border-top-color:var(--bb-primary);animation:bbSpin 2s linear infinite}
.bb-loading-ring--2{inset:14px;border-top-color:var(--bb-accent);animation:bbSpin 1.4s linear infinite reverse}
.bb-loading-ring--3{inset:28px;border-top-color:var(--bb-cold);animation:bbSpin 1s linear infinite}
.bb-loading-singularity{position:absolute;top:50%;left:50%;width:10px;height:10px;transform:translate(-50%,-50%);background:#fff;border-radius:50%;box-shadow:0 0 30px #fff,0 0 60px var(--bb-primary);animation:bbPulse 1.2s ease-in-out infinite}
@keyframes bbSpin{to{transform:rotate(360deg)}}
@keyframes bbPulse{0%,100%{transform:translate(-50%,-50%) scale(1);opacity:.7}50%{transform:translate(-50%,-50%) scale(1.5);opacity:1}}
.bb-loading-label{font-family:'Rajdhani',sans-serif;font-size:13px;letter-spacing:2px;text-transform:uppercase;color:var(--bb-text-dim);margin-bottom:16px}
.bb-loading-bar{width:200px;height:2px;background:rgba(240,192,64,0.15);border-radius:2px;overflow:hidden}
.bb-loading-bar-fill{height:100%;width:0;background:var(--bb-primary);transition:width .3s}

/* navbar */
.bb-navbar{position:fixed;top:0;left:0;right:0;height:52px;z-index:100;display:flex;align-items:center;justify-content:space-between;padding:0 18px;background:rgba(0,0,0,0.85);backdrop-filter:blur(12px);border-bottom:1px solid var(--bb-border)}
.bb-nav-logo{display:flex;align-items:center;gap:8px}
.bb-logo-icon{color:var(--bb-primary)}
.bb-logo-text{font-family:'Cinzel',serif;font-size:15px;font-weight:600;letter-spacing:2px;color:var(--bb-text)}
.bb-nav-center{display:flex;align-items:center}
.bb-nav-title{font-family:'Cinzel',serif;font-size:14px;letter-spacing:3px;text-transform:uppercase;color:var(--bb-text)}
.bb-nav-controls{display:flex;gap:6px}
.bb-btn{display:inline-flex;align-items:center;gap:4px;padding:5px 10px;font-family:'Rajdhani',sans-serif;font-size:11px;font-weight:500;letter-spacing:1px;text-transform:uppercase;color:var(--bb-text-dim);background:rgba(240,192,64,0.08);border:1px solid var(--bb-border);border-radius:4px;cursor:pointer;transition:all .25s;text-decoration:none}
.bb-btn:hover{color:var(--bb-text);background:rgba(240,192,64,0.18);border-color:rgba(240,192,64,0.45)}
.bb-btn.active{color:#fff;background:rgba(240,192,64,0.30);border-color:var(--bb-primary);box-shadow:0 0 12px rgba(240,192,64,0.25)}

/* viewport */
.bb-viewport{position:fixed;inset:0;z-index:1}
.bb-viewport canvas{display:block;width:100%;height:100%}

/* corner frames */
.bb-frame{position:fixed;z-index:50;width:36px;height:36px;border-color:var(--bb-primary);border-style:solid;opacity:.2;pointer-events:none}
.bb-frame--tl{top:62px;left:10px;border-width:1px 0 0 1px}
.bb-frame--tr{top:62px;right:10px;border-width:1px 1px 0 0}
.bb-frame--bl{bottom:48px;left:10px;border-width:0 0 1px 1px}
.bb-frame--br{bottom:48px;right:10px;border-width:0 1px 1px 0}

/* phase overlay */
.bb-phase{position:fixed;top:50%;left:50%;transform:translate(-50%,-50%);z-index:60;text-align:center;pointer-events:none;transition:opacity .8s}
.bb-phase-name{font-family:'Cinzel',serif;font-size:clamp(28px,5vw,52px);font-weight:700;letter-spacing:8px;text-transform:uppercase;color:#fff;text-shadow:0 0 40px var(--bb-primary),0 0 80px rgba(240,192,64,0.3);opacity:0;animation:bbPhaseIn 2s ease forwards}
.bb-phase-sub{font-family:'JetBrains Mono',monospace;font-size:13px;color:var(--bb-text-dim);margin-top:8px;letter-spacing:2px;opacity:0;animation:bbPhaseIn 2s ease .4s forwards}
@keyframes bbPhaseIn{to{opacity:1}}
.bb-phase.fading .bb-phase-name,.bb-phase.fading .bb-phase-sub{animation:bbPhaseFade .6s ease forwards}
@keyframes bbPhaseFade{to{opacity:0;transform:translateY(-10px)}}

/* math panel */
.bb-math-panel{position:fixed;z-index:80;top:64px;right:14px;width:360px;max-height:calc(100vh - 140px);background:rgba(0,0,0,0.92);backdrop-filter:blur(14px);border:1px solid var(--bb-border);border-radius:8px;padding:20px 22px;overflow-y:auto;scrollbar-width:thin;scrollbar-color:var(--bb-border) transparent;transform:translateY(16px);opacity:0;visibility:hidden;transition:all .35s}
.bb-math-panel.open{transform:translateY(0);opacity:1;visibility:visible}
.bb-panel-title{font-family:'Rajdhani',sans-serif;font-size:11px;font-weight:600;letter-spacing:2px;text-transform:uppercase;color:var(--bb-primary);margin-bottom:12px;padding-bottom:6px;border-bottom:1px solid var(--bb-border)}
.bb-panel-close{position:absolute;top:10px;right:12px;background:none;border:none;color:var(--bb-text-dim);font-size:16px;cursor:pointer;transition:color .2s}
.bb-panel-close:hover{color:var(--bb-primary)}
.bb-math-content h4{font-family:'Cinzel',serif;font-size:13px;font-weight:600;color:var(--bb-accent);margin:14px 0 6px}
.bb-math-content h4:first-child{margin-top:0}
.bb-math-content p{font-size:12px;line-height:1.7;color:rgba(237,224,212,0.8);margin-bottom:8px}
.bb-math-content code{font-family:'JetBrains Mono',monospace;font-size:11px;color:var(--bb-primary);background:rgba(240,192,64,0.08);padding:1px 5px;border-radius:3px}

/* telemetry */
.bb-telemetry{position:fixed;top:64px;left:14px;z-index:60;display:flex;flex-direction:column;gap:3px;padding:10px 12px;background:rgba(0,0,0,0.7);border:1px solid var(--bb-border);border-radius:4px}
.bb-tele-row{display:flex;align-items:baseline;gap:10px}
.bb-tele-lbl{font-family:'Rajdhani',sans-serif;font-size:9px;font-weight:600;letter-spacing:1.5px;text-transform:uppercase;color:var(--bb-text-dim);min-width:42px}
.bb-tele-val{font-family:'JetBrains Mono',monospace;font-size:10px;color:var(--bb-accent)}

/* timeline */
.bb-timeline{position:fixed;bottom:34px;left:50%;transform:translateX(-50%);z-index:60;width:min(700px,80vw);padding:0}
.bb-timeline-track{position:relative;height:4px;background:rgba(240,192,64,0.12);border-radius:2px;overflow:visible}
.bb-timeline-fill{height:100%;width:0;background:linear-gradient(90deg,var(--bb-cold),var(--bb-primary),var(--bb-accent));border-radius:2px;transition:width .3s}
.bb-timeline-phases{position:absolute;top:8px;left:0;right:0}
.bb-tl-mark{position:absolute;font-family:'Rajdhani',sans-serif;font-size:9px;letter-spacing:1px;text-transform:uppercase;color:var(--bb-text-dim);transform:translateX(-50%)}

/* footer */
.bb-footer{position:fixed;bottom:0;left:0;right:0;height:32px;z-index:90;background:rgba(0,0,0,0.92);border-top:1px solid var(--bb-border);overflow:hidden;display:flex;align-items:center}
.bb-footer-inner{width:100%;overflow:hidden}
.bb-marquee{overflow:hidden;white-space:nowrap}
.bb-marquee-track{display:inline-block;animation:bbMarquee 45s linear infinite}
.bb-quote{font-family:'Noto Sans Devanagari','Inter',sans-serif;font-size:11px;color:var(--bb-text-dim);padding:0 10px}
.bb-sep{color:var(--bb-primary);opacity:.4;padding:0 6px;font-size:10px}
@keyframes bbMarquee{0%{transform:translateX(0)}100%{transform:translateX(-50%)}}

/* responsive */
@media(max-width:860px){.bb-math-panel{width:calc(100vw - 24px);right:12px}.bb-telemetry{display:none}}
@media(max-width:640px){.bb-navbar{padding:0 8px;height:46px}.bb-nav-title{font-size:11px;letter-spacing:1px}.bb-btn{padding:4px 6px;font-size:10px}.bb-phase-name{letter-spacing:4px}}