:root{--t-bg: #16181f;--t-surface: #1e2029;--t-surface-high: #262936;--t-border: #2e3140;--t-border-hover: #3d4155;--t-text: #e8e9ed;--t-text-muted: #8b8fa3;--t-accent: #6366f1;--t-accent-light: #818cf8;--t-accent-low: #1e1b4b;--t-accent-high: #a5b4fc;--t-accent-glow: rgba(99, 102, 241, .15);--t-accent-glow-strong: rgba(99, 102, 241, .3);--t-gradient-accent: linear-gradient(135deg, #6366f1, #8b5cf6, #a78bfa);--t-gradient-hero: radial-gradient(ellipse 80% 50% at 50% -20%, rgba(99, 102, 241, .12), transparent);--t-gradient-card: linear-gradient(135deg, rgba(99, 102, 241, .06), transparent);--t-shadow-sm: 0 1px 2px rgba(0, 0, 0, .3);--t-shadow-md: 0 4px 12px rgba(0, 0, 0, .25);--t-shadow-lg: 0 8px 30px rgba(0, 0, 0, .3);--t-shadow-glow: 0 0 20px rgba(99, 102, 241, .15);--t-ease: cubic-bezier(.4, 0, .2, 1);--t-ease-bounce: cubic-bezier(.34, 1.56, .64, 1);--t-duration-fast: .15s;--t-duration: .25s;--t-duration-slow: .4s;--t-radius-sm: 6px;--t-radius-md: 10px;--t-radius-lg: 16px}[data-theme=light]{--t-bg: #fafafc;--t-surface: #ffffff;--t-surface-high: #f0f1f5;--t-border: #e2e4eb;--t-border-hover: #c7cad6;--t-text: #111827;--t-text-muted: #6b7280;--t-accent: #4f46e5;--t-accent-light: #6366f1;--t-accent-low: #eef2ff;--t-accent-high: #3730a3;--t-accent-glow: rgba(79, 70, 229, .08);--t-accent-glow-strong: rgba(79, 70, 229, .15);--t-gradient-accent: linear-gradient(135deg, #4f46e5, #7c3aed, #8b5cf6);--t-gradient-hero: radial-gradient(ellipse 80% 50% at 50% -20%, rgba(79, 70, 229, .06), transparent);--t-gradient-card: linear-gradient(135deg, rgba(79, 70, 229, .03), transparent);--t-shadow-sm: 0 1px 3px rgba(0, 0, 0, .06);--t-shadow-md: 0 4px 12px rgba(0, 0, 0, .08);--t-shadow-lg: 0 8px 30px rgba(0, 0, 0, .1);--t-shadow-glow: 0 0 20px rgba(79, 70, 229, .1)}:root{--color-bg: var(--t-bg);--color-surface: var(--t-surface);--color-surface-high: var(--t-surface-high);--color-border: var(--t-border);--color-border-hover: var(--t-border-hover);--color-text: var(--t-text);--color-text-muted: var(--t-text-muted);--color-accent: var(--t-accent);--color-accent-light: var(--t-accent-light);--color-accent-glow: var(--t-accent-glow);--max-width: 800px}[data-theme=light]{--color-bg: var(--t-bg);--color-surface: var(--t-surface);--color-surface-high: var(--t-surface-high);--color-border: var(--t-border);--color-border-hover: var(--t-border-hover);--color-text: var(--t-text);--color-text-muted: var(--t-text-muted);--color-accent: var(--t-accent);--color-accent-light: var(--t-accent-light);--color-accent-glow: var(--t-accent-glow)}@keyframes fadeInUp{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideInLeft{0%{opacity:0;transform:translate(-8px)}to{opacity:1;transform:translate(0)}}@keyframes shimmer{0%{background-position:-200% center}to{background-position:200% center}}.animate-fade-in-up{animation:fadeInUp var(--t-duration-slow) var(--t-ease) both}.animate-stagger>*{opacity:0;animation:fadeInUp var(--t-duration-slow) var(--t-ease) both}.animate-stagger>*:nth-child(1){animation-delay:0ms}.animate-stagger>*:nth-child(2){animation-delay:60ms}.animate-stagger>*:nth-child(3){animation-delay:.12s}.animate-stagger>*:nth-child(4){animation-delay:.18s}.animate-stagger>*:nth-child(5){animation-delay:.24s}.animate-stagger>*:nth-child(6){animation-delay:.3s}*,*:before,*:after{box-sizing:border-box}body{background:var(--color-bg);color:var(--color-text);font-family:Pretendard,Apple SD Gothic Neo,-apple-system,BlinkMacSystemFont,sans-serif;margin:0;padding:0;line-height:1.7;overflow-x:hidden;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}.container{max-width:var(--max-width);margin:0 auto;padding:0 1.5rem}header{position:sticky;top:0;z-index:100;background:color-mix(in srgb,var(--color-bg) 85%,transparent);backdrop-filter:blur(12px) saturate(1.5);-webkit-backdrop-filter:blur(12px) saturate(1.5);border-bottom:1px solid var(--color-border);padding:.75rem 0;transition:border-color var(--t-duration) var(--t-ease)}nav{display:flex;justify-content:space-between;align-items:center}.nav-brand{display:inline-flex;align-items:center;gap:.5rem;font-weight:700;font-size:1.1rem;color:var(--color-text);text-decoration:none;transition:color var(--t-duration) var(--t-ease)}.nav-brand:hover{color:var(--color-accent-light)}.nav-icon{flex-shrink:0;border-radius:4px;transition:transform var(--t-duration) var(--t-ease-bounce)}.nav-brand:hover .nav-icon{transform:rotate(-6deg) scale(1.05)}.nav-links{display:flex;gap:.25rem;list-style:none;margin:0;padding:0;align-items:center}.nav-links a{color:var(--color-text-muted);text-decoration:none;font-size:.88rem;font-weight:450;padding:.35rem .65rem;border-radius:var(--t-radius-sm);transition:color var(--t-duration) var(--t-ease),background var(--t-duration) var(--t-ease)}.nav-links a:hover{color:var(--color-accent-light);background:var(--color-accent-glow)}.nav-links a[aria-current]{color:var(--color-accent-light);font-weight:550;background:var(--color-accent-glow)}@media(max-width:600px){nav{flex-wrap:nowrap;gap:.5rem;padding:0}.nav-brand{flex-shrink:0}.nav-links{gap:0;flex-shrink:1;min-width:0;justify-content:flex-end}.nav-links a{font-size:.8rem;padding:.25rem .35rem;white-space:nowrap}.theme-select-wrap{flex-shrink:0}.theme-select-label{width:1.75rem;height:1.75rem}.theme-select-label .theme-select-icon{top:50%;left:50%;transform:translate(-50%,-50%)}.theme-caret{display:none}#theme-select{position:absolute;inset:0;width:1.75rem;height:1.75rem;padding:0;opacity:0;cursor:pointer}}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.theme-select-label{position:relative;display:inline-flex;align-items:center;color:var(--color-text-muted);cursor:pointer;padding:.35rem .5rem;border-radius:var(--t-radius-sm);transition:color var(--t-duration) var(--t-ease),background var(--t-duration) var(--t-ease)}.theme-select-label:hover{color:var(--color-accent-light);background:var(--color-accent-glow)}.theme-select-icon{position:absolute;left:.5rem;pointer-events:none}.theme-caret{position:absolute;right:0;pointer-events:none}#theme-select{border:0;background:transparent;appearance:none;color:inherit;cursor:pointer;font-size:.88rem;font-family:inherit;padding:.25rem 1.25rem;outline:none}#theme-select option{background:var(--color-surface);color:var(--color-text)}footer{border-top:1px solid var(--color-border);padding:2.5rem 0;text-align:center;color:var(--color-text-muted);font-size:.82rem;margin-top:3rem;letter-spacing:.01em}footer p{margin:0;opacity:.8}.observe-fade{opacity:0;transform:translateY(16px);transition:opacity var(--t-duration-slow) var(--t-ease),transform var(--t-duration-slow) var(--t-ease)}.observe-fade.is-visible{opacity:1;transform:translateY(0)}