:root{--bg-color:#f7f7f8;--card-bg:#fff;--text-primary:#111827;--text-secondary:#6b7280;--border-color:#e5e7eb;--accent-color:#111827;--accent-hover:#1f2937;--error-color:#dc2626}*{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background-color:var(--bg-color);color:var(--text-primary);min-height:100vh;display:flex;align-items:center;justify-content:center;padding:1rem}.simple-container{width:100%;max-width:360px}.simple-box{background:var(--card-bg);border:1px solid var(--border-color);border-radius:8px;padding:2rem;box-shadow:0 1px 3px rgba(0,0,0,.05)}.simple-title{font-size:1.125rem;font-weight:600;color:var(--text-primary);margin-bottom:1rem;letter-spacing:-.01em}.simple-desc{font-size:.875rem;color:var(--text-secondary);margin-bottom:1.25rem;line-height:1.4}.simple-input{width:100%;padding:.625rem .75rem;font-size:.9375rem;border:1px solid var(--border-color);border-radius:6px;background:#fff;color:var(--text-primary);margin-bottom:1rem;outline:none;transition:border-color .15s ease}.simple-input:focus{border-color:var(--text-primary)}.simple-btn{width:100%;display:inline-flex;align-items:center;justify-content:center;padding:.625rem 1rem;font-size:.9375rem;font-weight:500;color:#fff;background-color:var(--accent-color);border:1px solid var(--accent-color);border-radius:6px;cursor:pointer;text-decoration:none;transition:background-color .15s ease}.simple-btn:hover{background-color:var(--accent-hover)}.simple-btn:disabled{opacity:.6;cursor:not-allowed}.simple-btn-sub{width:100%;padding:.5rem .75rem;font-size:.875rem;font-weight:500;color:var(--text-primary);background-color:#fff;border:1px solid var(--border-color);border-radius:6px;cursor:pointer;margin-top:.5rem;transition:border-color .15s ease,background-color .15s ease}.simple-btn-sub:hover{border-color:#9ca3af;background-color:#f9fafb}.error-text{font-size:.8125rem;color:var(--error-color);margin-bottom:1rem;padding:.5rem .75rem;background-color:#fef2f2;border:1px solid #fee2e2;border-radius:6px}