:root{--bg: #f6f7f9;--surface: #ffffff;--text: #1b1f24;--muted: #6b7280;--border: #e2e5ea;--accent: #1f6feb;--accent-dark: #175bc4;--danger-bg: #fdecec;--danger-text: #a12622;--success-bg: #e9f7ef;--success-text: #1d6b3a;--radius: 10px;--space: 1rem}*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,sans-serif;background:var(--bg);color:var(--text);line-height:1.5}.center-screen{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:var(--space)}.page{min-height:100vh;display:flex;flex-direction:column}.topbar{display:flex;align-items:center;justify-content:space-between;padding:.75rem 1.25rem;background:var(--surface);border-bottom:1px solid var(--border)}.brand{font-weight:700}.content{width:min(640px,100%);margin:2rem auto;padding:0 var(--space)}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:1.5rem;width:min(420px,100%)}.content .card{width:100%}.stack>*+*{margin-top:var(--space)}.page-title{margin:0;font-size:1.4rem}.muted{color:var(--muted)}.small{font-size:.85rem}.center{text-align:center}.field{display:flex;flex-direction:column;gap:.3rem;margin-bottom:.75rem}.field label{font-size:.85rem;font-weight:600}.field input{padding:.55rem .7rem;border:1px solid var(--border);border-radius:6px;font:inherit}.field input:focus{outline:2px solid var(--accent);outline-offset:1px;border-color:var(--accent)}.btn{padding:.55rem 1rem;border:none;border-radius:6px;background:var(--accent);color:#fff;font:inherit;font-weight:600;cursor:pointer}.btn:hover:not(:disabled){background:var(--accent-dark)}.btn:disabled{opacity:.6;cursor:default}.btn-secondary{background:var(--surface);color:var(--text);border:1px solid var(--border)}.btn-secondary:hover:not(:disabled){background:var(--bg)}.btn-block{width:100%}.btn-ghost{background:none;border:none;color:var(--accent);font:inherit;cursor:pointer;padding:0}.alert{padding:.6rem .9rem;border-radius:6px;font-size:.9rem}.alert-error{background:var(--danger-bg);color:var(--danger-text)}.alert-success{background:var(--success-bg);color:var(--success-text)}