:root{--bg: #fafaf9;--surface: #ffffff;--border: #e7e5e4;--text: #1c1917;--muted: #78716c;--accent: #2563eb;--accent-hover: #1d4ed8;--error: #dc2626;--success: #16a34a}*{box-sizing:border-box;margin:0;padding:0}html,body{background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,system-ui,sans-serif;font-size:14px;line-height:1.5}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}button,input[type=submit]{cursor:pointer;border:1px solid var(--accent);background:var(--accent);color:#fff;padding:8px 16px;border-radius:6px;font-size:14px;font-family:inherit}button:hover,input[type=submit]:hover{background:var(--accent-hover);border-color:var(--accent-hover)}button.secondary,input[type=submit].secondary{background:var(--surface);color:var(--text);border-color:var(--border)}input[type=text],input[type=password],input[type=email],input[type=url],input[type=number],textarea,select{display:block;width:100%;padding:8px 10px;font-size:14px;font-family:inherit;background:var(--surface);border:1px solid var(--border);border-radius:6px;color:var(--text)}input:focus,textarea:focus,select:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 2px #2563eb26}label{display:block;margin-bottom:4px;font-weight:500}.field{margin-bottom:14px}.error{color:var(--error);font-size:13px;margin-top:4px}.flash{padding:10px 14px;border-radius:6px;margin-bottom:16px}.flash.error{background:#fef2f2;color:var(--error);border:1px solid #fecaca}.flash.success{background:#f0fdf4;color:var(--success);border:1px solid #bbf7d0}.center-page{min-height:100vh;display:grid;place-items:center;padding:24px}.card{background:var(--surface);border:1px solid var(--border);border-radius:10px;padding:24px;width:100%;max-width:360px}.card h1{font-size:20px;margin-bottom:4px}.card .subtitle{color:var(--muted);font-size:13px;margin-bottom:18px}.admin-shell{display:grid;grid-template-columns:220px 1fr;min-height:100vh}.admin-sidebar{background:var(--surface);border-right:1px solid var(--border);padding:16px}.admin-sidebar .brand{font-weight:700;font-size:14px;margin-bottom:18px;letter-spacing:.04em;text-transform:uppercase;color:var(--muted)}.admin-sidebar nav a{display:block;padding:7px 10px;border-radius:6px;color:var(--text);font-weight:500}.admin-sidebar nav a:hover{background:#f5f5f4;text-decoration:none}.admin-sidebar nav a.active{background:#eff6ff;color:var(--accent)}.admin-sidebar .footer{margin-top:24px;padding-top:14px;border-top:1px solid var(--border);font-size:12px;color:var(--muted)}.admin-main{padding:24px 32px;max-width:1400px}.admin-main h1{font-size:22px;margin-bottom:16px}.muted{color:var(--muted)}table{width:100%;border-collapse:collapse;background:var(--surface);border:1px solid var(--border);border-radius:6px;overflow:hidden}th,td{text-align:left;padding:8px 12px;border-bottom:1px solid var(--border)}th{background:#fafaf9;font-weight:600;font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:.04em}tr:last-child td{border-bottom:none}