:root{
  --bg:#f6f8ff;
  --card:#ffffff;
  --ink:#0e1020;
  --ink2:#5b6378;
  --ink3:#8c95a5;
  --brand:#6673ff;
  --brand2:#4f46e5;
  --brand-light:#e0e4ff;
  --brand-gradient:linear-gradient(135deg, var(--brand), var(--brand2));
  --line:#e5e7eb;
  --red:#ef4444;
  --red-dark:#dc2626;
  --green:#10b981;
  --shadow:0 4px 12px rgba(16,19,31,.06);
  --shadow-lg:0 20px 45px rgba(16,19,31,.10);
  --radius:14px;
  --radius-lg:20px;
}

*{margin:0;padding:0;box-sizing:border-box;font-family:'Inter',ui-sans-serif,system-ui,-apple-system,sans-serif}
html,body{background:var(--bg);color:var(--ink);min-height:100%;}
body{line-height:1.5;}
a{color:inherit}

/* ---------- Header fijo compartido ---------- */
#topbar{
  height:60px;background:var(--card);border-bottom:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;
  padding:0 22px;box-shadow:0 1px 5px rgba(0,0,0,.05);
  position:fixed;top:0;left:0;right:0;z-index:1000;
}
#topbar .brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:18px;color:var(--ink);text-decoration:none}
#topbar .brand .dot{width:10px;height:10px;border-radius:3px;background:var(--brand-gradient);display:inline-block}
#topbar .actions{display:flex;align-items:center;gap:10px}
.page{padding-top:60px;min-height:100vh;display:flex;flex-direction:column}

.btn-back{
  display:inline-flex;align-items:center;gap:8px;
  background:var(--brand-light);color:var(--brand2);
  padding:8px 14px;border-radius:10px;font-weight:700;font-size:14px;
  text-decoration:none;border:0;cursor:pointer;transition:.2s;
}
.btn-back:hover{background:#d4d9ff}

/* ---------- Botones ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 22px;border-radius:12px;font-weight:700;font-size:15px;
  border:0;cursor:pointer;transition:.2s;text-decoration:none;
}
.btn-primary{background:var(--brand-gradient);color:#fff;box-shadow:0 10px 24px rgba(102,115,255,.30)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 32px rgba(102,115,255,.4)}
.btn-primary:disabled{opacity:.6;cursor:not-allowed;transform:none}
.btn-ghost{background:#fff;color:var(--ink);border:1.5px solid var(--line)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand2)}
.btn-danger{background:#fff;color:var(--red);border:1.5px solid #fbdada}
.btn-danger:hover{background:#fff5f5;border-color:var(--red)}
.btn-block{width:100%}
.btn-sm{padding:8px 14px;font-size:13px;border-radius:9px}

/* ---------- Formularios ---------- */
.field{margin-bottom:16px;text-align:left}
.field label{display:block;font-size:13px;font-weight:700;color:var(--ink2);margin-bottom:6px}
.field input, .field select, .field textarea{
  width:100%;padding:12px 14px;border-radius:10px;border:1.5px solid var(--line);
  font-size:15px;color:var(--ink);background:#fff;transition:.2s;
}
.field input:focus, .field select:focus, .field textarea:focus{outline:none;border-color:var(--brand)}
.field small{display:block;margin-top:6px;color:var(--ink3);font-size:12.5px}
.field .prefix-input{display:flex;align-items:stretch;border:1.5px solid var(--line);border-radius:10px;overflow:hidden}
.field .prefix-input span{background:#f2f3fb;color:var(--ink2);padding:12px 10px;font-size:14px;font-weight:600;white-space:nowrap}
.field .prefix-input input{border:0;border-radius:0}
.field .prefix-input:focus-within{border-color:var(--brand)}

/* ---------- Cards ---------- */
.card{background:var(--card);border-radius:var(--radius-lg);box-shadow:var(--shadow);padding:28px}
.card-hover{transition:.2s}
.card-hover:hover{box-shadow:var(--shadow-lg);transform:translateY(-2px)}

/* ---------- Alertas / mensajes ---------- */
.msg{padding:11px 14px;border-radius:10px;font-size:14px;font-weight:600;margin-bottom:16px;display:none}
.msg.show{display:block}
.msg-error{background:#fef2f2;color:#b91c1c;border:1px solid #fecaca}
.msg-ok{background:#f0fdf4;color:#15803d;border:1px solid #bbf7d0}

/* ---------- Loader ---------- */
.spinner{width:34px;height:34px;border-radius:50%;border:3px solid var(--brand-light);border-top-color:var(--brand);animation:spin .7s linear infinite;margin:0 auto}
@keyframes spin{to{transform:rotate(360deg)}}
.empty{text-align:center;color:var(--ink3);padding:50px 20px}

/* ---------- Utilidades ---------- */
.container{width:min(100%,1100px);margin:0 auto;padding:0 20px}
.muted{color:var(--ink2)}
.center{text-align:center}
.stack{display:flex;flex-direction:column;gap:14px}
.row{display:flex;align-items:center;gap:10px}
.badge{display:inline-flex;align-items:center;gap:6px;background:var(--brand-light);color:var(--brand2);font-weight:700;font-size:12.5px;padding:4px 10px;border-radius:999px}

@media(max-width:640px){
  #topbar{padding:0 14px}
  .card{padding:20px}
}