:root{--brand-teal: #14b8a6;--bg-dark: #030712;--white-soft: rgba(255, 255, 255, .6);--glass-bg: rgba(255, 255, 255, .04);--glass-border: rgba(255, 255, 255, .08);--error: #f87171;--success: #34d399}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-dark);color:#fff;font-family:Inter,system-ui,sans-serif;line-height:1.5;background-image:radial-gradient(circle at 0% 0%,rgba(20,184,166,.1) 0%,transparent 40%);background-attachment:fixed;min-height:100vh}.glass-panel{background:var(--glass-bg);backdrop-filter:blur(.75rem);-webkit-backdrop-filter:blur(.75rem);border:.0625rem solid var(--glass-border);border-radius:1.5rem}.btn-teal{background:var(--brand-teal);color:#030712;font-weight:900;text-transform:uppercase;padding:1.2rem 2.5rem;border-radius:6rem;border:none;cursor:pointer;font-size:.85rem;letter-spacing:.1rem}.chromatic-pulse{animation:pulse 2.5s infinite ease-in-out}@keyframes pulse{0%,to{text-shadow:-.05rem 0 var(--error),.05rem 0 var(--brand-teal);opacity:.8}50%{text-shadow:.1rem 0 var(--error),-.1rem 0 var(--brand-teal);transform:scale(1.05);opacity:1}}.fade-in{animation:fadeInUp .6s forwards}@keyframes fadeInUp{0%{opacity:0;transform:translateY(1rem)}to{opacity:1;transform:translateY(0)}}.top-nav{width:100%;border-bottom:.0625rem solid rgba(255,255,255,.05);background:rgba(3,7,18,.8);backdrop-filter:blur(1.2rem);-webkit-backdrop-filter:blur(1.2rem);position:fixed;top:0;z-index:1000}.nav-container{max-width:65rem;margin:0 auto;padding:1.5rem 2rem;display:flex;align-items:center;justify-content:space-between;position:relative}.nav-logo{position:absolute;left:50%;transform:translate(-50%);font-size:1.5rem;font-weight:900;letter-spacing:.2rem;color:#fff;text-decoration:none;text-transform:uppercase}.nav-logo span{color:var(--brand-teal)}.nav-links{margin-left:auto;display:flex;gap:2rem}.nav-link{color:var(--white-soft);text-decoration:none;font-weight:800;font-size:.85rem;letter-spacing:.1rem;text-transform:uppercase;transition:color .2s ease-in-out}.nav-link:hover{color:var(--brand-teal)}@media (max-width: 600px){.nav-container{padding:1.2rem 1.5rem}.nav-logo{position:relative;left:0;transform:none;font-size:1.2rem}}.custom-select{width:100%;padding:1.2rem 1.5rem;font-size:1.1rem;font-weight:700;color:#fff;background:rgba(255,255,255,.04);border:.0625rem solid var(--glass-border);border-radius:1rem;-webkit-appearance:none;-moz-appearance:none;appearance:none;outline:none;cursor:pointer}.custom-select option{background:var(--bg-dark);color:#fff}.exam-progress-bar{display:flex;gap:.4rem;width:100%;margin-bottom:2rem}.progress-block{flex:1;height:.6rem;border-radius:.2rem;background:rgba(255,255,255,.1);transition:all .3s ease}.block-correct{background:var(--success)}.block-incorrect{background:var(--error)}.block-current{background:#f97316}.chromatic-pulse-orange{animation:pulseOrange 2s infinite}@keyframes pulseOrange{0%,to{box-shadow:0 0 .5rem #f97316;opacity:.8}50%{box-shadow:0 0 1rem #f97316,0 0 .2rem #f97316;transform:scale(1.05);opacity:1}}.radio-option{display:flex;align-items:center;padding:1.2rem 2rem;cursor:pointer;background:rgba(255,255,255,.03);border:.0625rem solid var(--glass-border);border-radius:1rem;transition:all .2s cubic-bezier(.4,0,.2,1)}.radio-option:hover{background:rgba(20,184,166,.08);border-color:var(--brand-teal);transform:translate(.5rem)}.radio-circle{width:1.5rem;height:1.5rem;border-radius:50%;border:.15rem solid var(--white-soft);margin-right:1.5rem;flex-shrink:0;position:relative;transition:all .2s}.radio-option:hover .radio-circle{border-color:var(--brand-teal)}.radio-option:hover .radio-circle:after{content:"";position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:.75rem;height:.75rem;background:var(--brand-teal);border-radius:50%}.radio-text{color:#fff;font-size:1.1rem;font-weight:500;line-height:1.4}