:root{--primary-bg: #0a0e17;--card-bg: rgba(255, 255, 255, .05);--accent-blue: #00d2ff;--accent-purple: #9d50bb;--text-main: #e0e0e0;--text-muted: #a0a0a0;--glass-border: rgba(255, 255, 255, .1);--auth-bg-start: #1a2a4a;--auth-bg-end: #0a0e17;--nav-bg: rgba(10, 14, 23, .8)}[data-theme=light]{--primary-bg: #f8faff;--card-bg: rgba(255, 255, 255, .9);--accent-blue: #0076ff;--accent-purple: #8227b0;--text-main: #1a1a1a;--text-muted: #666666;--glass-border: rgba(0, 0, 0, .08);--auth-bg-start: #e0e7ff;--auth-bg-end: #f8faff;--nav-bg: rgba(255, 255, 255, .8)}*{box-sizing:border-box;margin:0;padding:0;transition:background-color .3s ease,color .3s ease,border-color .3s ease}body{font-family:Pretendard,-apple-system,BlinkMacSystemFont,system-ui,Roboto,Helvetica Neue,Segoe UI,Apple SD Gothic Neo,Noto Sans KR,Malgun Gothic,"Apple Color Emoji","Segoe UI Emoji",Segoe UI Symbol,sans-serif;background-color:var(--primary-bg);color:var(--text-main);line-height:1.6;overflow-x:hidden}#root{min-height:100vh;display:flex;flex-direction:column}.auth-container{display:flex;justify-content:center;align-items:center;height:100vh;background:radial-gradient(circle at center,var(--auth-bg-start) 0%,var(--auth-bg-end) 100%)}.glass-card{background:var(--card-bg);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:1px solid var(--glass-border);border-radius:24px;padding:2rem;box-shadow:0 8px 32px #0003;transition:transform .3s ease,box-shadow .3s ease,background-color .3s ease}.glass-card:hover{box-shadow:0 8px 32px #00d2ff26}.btn-primary{background:linear-gradient(135deg,var(--accent-blue),var(--accent-purple));color:#fff;border:none;padding:.8rem 1.5rem;border-radius:12px;font-weight:600;cursor:pointer;transition:opacity .2s,transform .1s}.btn-primary:active{transform:scale(.98)}.btn-primary:hover{opacity:.9}.timeline{position:relative;max-width:1200px;margin:2rem auto;padding:1rem}.timeline-item{position:relative;margin-bottom:2rem;padding-left:3rem;border-left:2px solid var(--accent-blue)}.timeline-item:before{content:"";position:absolute;left:-9px;top:0;width:16px;height:16px;border-radius:50%;background:var(--accent-blue);box-shadow:0 0 10px var(--accent-blue)}.grade-badge{display:inline-block;padding:.2rem .8rem;border-radius:20px;background:#00d2ff1a;color:var(--accent-blue);font-size:.8rem;margin-bottom:.5rem;font-weight:600}h1,h2,h3{background:linear-gradient(to right,var(--text-main),var(--accent-blue));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;margin-bottom:1rem}input,select{background:var(--card-bg);border:1px solid var(--glass-border);color:var(--text-main);padding:.8rem;border-radius:12px;width:100%;margin-bottom:1rem}select option{background-color:var(--primary-bg);color:var(--text-main)}input:focus,select:focus{outline:none;border-color:var(--accent-blue)}.markdown-content h1{font-size:1.5rem;margin-top:2rem;border-bottom:1px solid var(--glass-border);padding-bottom:.5rem;color:#fff;-webkit-text-fill-color:initial;background:none}.markdown-content h1:first-child{margin-top:0}.markdown-content h2{font-size:1.3rem;margin-top:1.5rem;color:var(--accent-blue);background:none;-webkit-text-fill-color:var(--accent-blue)}.markdown-content h3{font-size:1.1rem;margin-top:1rem;margin-bottom:.5rem;background:none;-webkit-text-fill-color:white;font-weight:700}.markdown-content p{margin-bottom:1rem}.markdown-content ul,.markdown-content ol{margin-left:1.2rem;margin-bottom:1rem;color:var(--text-muted)}.markdown-content li{margin-bottom:.3rem}.markdown-content strong{color:var(--accent-blue);font-weight:700}.markdown-content blockquote{border-left:3px solid var(--accent-purple);padding-left:1rem;color:var(--text-muted);font-style:italic;margin-bottom:1rem}.mobile-notice{background:#ff4b2b1a;border:1px solid rgba(255,75,43,.3);color:#ff4b2b;padding:.8rem;border-radius:12px;font-size:.9rem;margin-bottom:2rem;display:flex;align-items:center;justify-content:center;gap:.5rem;text-align:center}@media (max-width: 1024px){.main-grid{grid-template-columns:1fr!important}}@media (max-width: 768px){nav{padding:1rem!important}nav .container{flex-direction:column;gap:1rem;text-align:center}main{padding:1rem!important}h1{font-size:1.8rem!important}.glass-card{padding:1.5rem!important}.timeline-item{padding-left:1.5rem}.track-grid{grid-template-columns:1fr!important;gap:1rem!important}.btn-primary{width:100%}}