:root{--font-sans:"Pretendard", -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Malgun Gothic", "Noto Sans KR", system-ui, sans-serif;--font-mono:ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;--color-bg:#f6f7f9;--color-surface:#fff;--color-text:#1b1f24;--color-text-muted:#5f6b7a;--color-border:#dde1e6;--color-primary:#2f6fed;--color-primary-text:#fff;--color-danger:#d33a3a;--color-success:#1f9d55;--color-up:#d33a3a;--color-down:#2f6fed;--radius:10px;--space-1:4px;--space-2:8px;--space-3:12px;--space-4:16px;--space-6:24px;--shadow:0 1px 3px #00000014;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light}@media (prefers-color-scheme:dark){:root:not([data-theme=light]){--color-bg:#121418;--color-surface:#1c1f25;--color-text:#e6e8eb;--color-text-muted:#9aa4b1;--color-border:#2e333b;--color-primary:#5b8cff;--color-primary-text:#0d1117;--color-danger:#ff6b6b;--color-success:#3ecf7a;--color-up:#ff6b6b;--color-down:#5b8cff;--shadow:0 1px 3px #0006;--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark}}:root[data-theme=dark]{--color-bg:#121418;--color-surface:#1c1f25;--color-text:#e6e8eb;--color-text-muted:#9aa4b1;--color-border:#2e333b;--color-primary:#5b8cff;--color-primary-text:#0d1117;--color-danger:#ff6b6b;--color-success:#3ecf7a;--color-up:#ff6b6b;--color-down:#5b8cff;--shadow:0 1px 3px #0006;--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark}*,:before,:after{box-sizing:border-box}body{font-family:var(--font-sans);background:var(--color-bg);color:var(--color-text);margin:0;line-height:1.5}a{color:var(--color-primary)}.container{max-width:720px;padding:var(--space-6) var(--space-4);margin:0 auto}.card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius);box-shadow:var(--shadow);padding:var(--space-6)}.stack{gap:var(--space-3);flex-direction:column;display:flex}.muted{color:var(--color-text-muted)}.error{color:var(--color-danger)}label{gap:var(--space-1);flex-direction:column;font-size:.9rem;display:flex}input{font:inherit;padding:var(--space-2) var(--space-3);border:1px solid var(--color-border);border-radius:var(--radius);background:var(--color-bg);color:var(--color-text)}button,.button{font:inherit;padding:var(--space-2) var(--space-4);border-radius:var(--radius);background:var(--color-primary);color:var(--color-primary-text);cursor:pointer;text-align:center;border:1px solid #0000;text-decoration:none}button:disabled{opacity:.6;cursor:default}button.secondary,.button.secondary{color:var(--color-text);border-color:var(--color-border);background:0 0}.app-header{justify-content:space-between;align-items:center;gap:var(--space-3);margin-bottom:var(--space-6);display:flex}.app-header h1{margin:0;font-size:1.4rem}.app-header .actions{gap:var(--space-2);align-items:center;display:flex}