:root{--bg:#0b0e14;--bg-card:#131824;--text:#c8cdd8;--text-dim:#7c8494;--heading:#f2f4f8;--accent:#5b8cff;--accent-2:#8b5bff;--border:#232a3a;--nav-bg:#0b0e14cc;--bubble:#1b2232;--radius:14px;--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark}:root[data-theme=light]{--bg:#f7f8fb;--bg-card:#fff;--text:#3a4152;--text-dim:#6b7280;--heading:#111827;--border:#e5e7eb;--nav-bg:#f7f8fbd9;--bubble:#eef1f7;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light}*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{background:var(--bg);color:var(--text);font-family:Pretendard,-apple-system,BlinkMacSystemFont,system-ui,Segoe UI,sans-serif;line-height:1.65}.container{max-width:960px;margin:0 auto;padding:0 24px}.nav{z-index:10;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);background:var(--nav-bg);border-bottom:1px solid var(--border);position:sticky;top:0}.nav-inner{justify-content:space-between;align-items:center;height:60px;display:flex}.nav-logo{color:var(--heading);font-size:1.05rem;font-weight:800;text-decoration:none}.nav-links{gap:22px;list-style:none;display:flex}.nav-links a{color:var(--text-dim);font-size:.9rem;text-decoration:none;transition:color .15s}.nav-links a:hover{color:var(--heading)}.nav-right{align-items:center;gap:20px;display:flex}.lang-toggle{border:1px solid var(--border);border-radius:999px;display:flex;overflow:hidden}.lang-toggle button{color:var(--text-dim);cursor:pointer;background:0 0;border:none;padding:6px 12px;font-family:inherit;font-size:.78rem;font-weight:600;transition:background .15s,color .15s}.lang-toggle button.active{background:linear-gradient(90deg, var(--accent), var(--accent-2));color:#fff}.lang-toggle button:not(.active):hover{color:var(--heading)}.hero{padding:110px 0 90px}.hero-tag{color:var(--accent);border:1px solid var(--accent);border-radius:999px;margin-bottom:20px;padding:4px 14px;font-size:.8rem;display:inline-block}.hero h1{color:var(--heading);margin-bottom:18px;font-size:clamp(2rem,5vw,3.2rem);line-height:1.25}.hero h1 .grad{background:linear-gradient(90deg, var(--accent), var(--accent-2));color:#0000;-webkit-background-clip:text;background-clip:text}.hero p{max-width:560px;color:var(--text-dim);margin-bottom:30px}.btn-row{flex-wrap:wrap;gap:12px;display:flex}.btn{cursor:pointer;border:none;border-radius:10px;padding:11px 22px;font-family:inherit;font-size:.92rem;text-decoration:none;transition:opacity .15s,background .15s;display:inline-block}.btn-primary{background:linear-gradient(90deg, var(--accent), var(--accent-2));color:#fff}.btn-primary:hover{opacity:.85}.btn-ghost{border:1px solid var(--border);color:var(--text);background:0 0}.btn-ghost:hover{background:var(--bg-card)}section{border-top:1px solid var(--border);padding:70px 0}.section-title{color:var(--heading);margin-bottom:8px;font-size:1.5rem}.section-sub{color:var(--text-dim);margin-bottom:36px;font-size:.92rem}.skill-grid{grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:16px;display:grid}.card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:22px}.card h3{color:var(--heading);margin-bottom:10px;font-size:1rem}.chip-row{flex-wrap:wrap;gap:8px;display:flex}.chip{color:var(--accent);background:#5b8cff1f;border-radius:999px;padding:3px 10px;font-size:.78rem}.exp-list{gap:16px;display:grid}.exp-head{flex-direction:column;gap:4px;margin-bottom:12px;display:flex}.exp-role{color:var(--accent);font-size:.92rem;font-weight:400}.exp .meta{color:var(--text-dim);font-size:.8rem}.exp ul{gap:6px;margin-bottom:14px;list-style:none;display:grid}.exp li{padding-left:18px;font-size:.9rem;position:relative}.exp li:before{content:"›";color:var(--accent);position:absolute;left:4px}.exp-tech{color:var(--text-dim);font-size:.78rem}.exp-lesson{border-left:3px solid var(--accent);color:var(--text);background:#5b8cff0f;border-radius:0 8px 8px 0;margin-top:12px;padding:10px 14px;font-size:.85rem}.exp-clickable{cursor:pointer;transition:border-color .15s,transform .15s}.exp-clickable:hover,.exp-clickable:focus-visible{border-color:var(--accent);transform:translateY(-2px)}.detail-cta{color:var(--accent);margin-top:12px;font-size:.85rem;font-weight:600;display:inline-block}.detail{padding:48px 24px 80px}.detail-back{border:1px solid var(--border);color:var(--text-dim);cursor:pointer;background:0 0;border-radius:8px;margin-bottom:28px;padding:8px 14px;font-family:inherit;font-size:.85rem;transition:color .15s,border-color .15s}.detail-back:hover{color:var(--heading);border-color:var(--accent)}.detail-title{color:var(--heading);margin:14px 0 4px;font-size:clamp(1.5rem,4vw,2.2rem)}.detail-overview{max-width:700px;margin:18px 0 40px;font-size:1.02rem}.detail .section-title{margin:36px 0 16px}.detail-body{margin-top:8px;font-size:.92rem}.detail .exp-lesson{margin-top:36px}.about-intro{max-width:700px;margin-bottom:32px;font-size:1.02rem}.about-value{color:var(--text-dim);font-size:.88rem}.project-list{gap:16px;display:grid}.project{flex-direction:column;gap:8px;display:flex}.project .meta{color:var(--text-dim);font-size:.8rem}.project p{font-size:.92rem}.contact a{color:var(--accent);text-decoration:none}footer{border-top:1px solid var(--border);text-align:center;color:var(--text-dim);padding:28px 0;font-size:.82rem}.footer-links{margin-bottom:8px}.footer-links a{color:var(--text);text-decoration:none}.footer-links a:hover{color:var(--accent)}.chat-fab{background:linear-gradient(135deg, var(--accent), var(--accent-2));color:#fff;cursor:pointer;z-index:40;border:none;border-radius:50%;width:56px;height:56px;font-size:1.4rem;position:fixed;bottom:24px;right:24px;box-shadow:0 8px 24px #5b8cff66}.chat-panel{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);z-index:40;flex-direction:column;width:min(360px,100vw - 48px);height:480px;max-height:calc(100vh - 130px);display:flex;position:fixed;bottom:92px;right:24px;overflow:hidden;box-shadow:0 16px 48px #00000080}.chat-head{border-bottom:1px solid var(--border);color:var(--heading);padding:14px 18px;font-size:.95rem;font-weight:700}.chat-head span{color:var(--text-dim);font-size:.75rem;font-weight:400;display:block}.chat-body{flex-direction:column;flex:1;gap:10px;padding:16px;display:flex;overflow-y:auto}.msg{white-space:pre-wrap;word-break:break-word;border-radius:12px;max-width:85%;padding:9px 13px;font-size:.88rem}.msg.user{background:var(--accent);color:#fff;border-bottom-right-radius:4px;align-self:flex-end}.msg.model{background:var(--bubble);border-bottom-left-radius:4px;align-self:flex-start}.chat-suggestions{flex-direction:column;align-items:flex-start;gap:8px;display:flex}.chat-chip{border:1px solid var(--accent);color:var(--accent);cursor:pointer;text-align:left;background:0 0;border-radius:999px;padding:7px 14px;font-family:inherit;font-size:.82rem;transition:background .15s,color .15s}.chat-chip:hover{background:var(--accent);color:#fff}.theme-toggle{border:1px solid var(--border);cursor:pointer;background:0 0;border-radius:50%;width:34px;height:34px;font-size:1rem;line-height:1;transition:border-color .15s}.theme-toggle:hover{border-color:var(--accent)}.msg.typing{color:var(--text-dim);font-style:italic}.chat-input{border-top:1px solid var(--border);gap:8px;padding:12px;display:flex}.chat-input input{background:var(--bg);border:1px solid var(--border);color:var(--text);border-radius:10px;outline:none;flex:1;padding:10px 12px;font-family:inherit;font-size:.88rem}.chat-input input:focus{border-color:var(--accent)}.chat-input button{padding:0 16px}@media (prefers-reduced-motion:no-preference){.card,.section-title,.section-sub{opacity:0;transition:opacity .5s,transform .5s;transform:translateY(16px)}.card.visible,.section-title.visible,.section-sub.visible{opacity:1;transform:none}}@media (width<=640px){.nav-inner{flex-wrap:wrap;gap:8px;height:auto;padding:10px 0}.nav-links{gap:14px;font-size:.82rem}.hero{padding:70px 0 60px}.chat-panel{height:min(480px,100vh - 130px)}}