:root {
  --primary: #0f4c81;
  --primary-dark: #0a3860;
  --accent: #1b9c85;
  --bg: #f4f6f9;
  --card: #ffffff;
  --text: #1e293b;
  --muted: #64748b;
  --border: #e2e8f0;
  --danger: #dc2626;
  --warning: #d97706;
  --success: #16a34a;
  --radius: 10px;
}
* { box-sizing: border-box; }
body { margin: 0; font-family: 'Segoe UI', Roboto, Arial, sans-serif; background: var(--bg); color: var(--text); }
.hidden { display: none !important; }
.screen { min-height: 100vh; }

/* ---------- LOGIN ---------- */
#login-screen { display: flex; align-items: center; justify-content: center; background: linear-gradient(135deg, var(--primary), var(--primary-dark)); }
.login-card { background: var(--card); padding: 40px; border-radius: var(--radius); width: 360px; box-shadow: 0 20px 50px rgba(0,0,0,.25); text-align: center; }
.login-logo { font-size: 26px; font-weight: 700; color: var(--primary); margin-bottom: 4px; }
.login-sub { color: var(--muted); font-size: 13px; margin-bottom: 24px; }
#login-form { text-align: left; }
#login-form label { display: block; font-size: 13px; color: var(--muted); margin: 12px 0 4px; }
#login-form input { width: 100%; padding: 10px 12px; border: 1px solid var(--border); border-radius: 8px; font-size: 14px; }
#login-form button { width: 100%; margin-top: 20px; padding: 11px; background: var(--primary); color: #fff; border: none; border-radius: 8px; font-size: 15px; font-weight: 600; cursor: pointer; }
#login-form button:hover { background: var(--primary-dark); }
.error-msg { color: var(--danger); font-size: 13px; margin-top: 8px; min-height: 16px; }

/* ---------- TOPBAR ---------- */
.topbar { display: flex; justify-content: space-between; align-items: center; background: var(--primary); color: #fff; padding: 0 24px; height: 56px; position: sticky; top: 0; z-index: 20; }
.topbar-left { display: flex; align-items: center; gap: 28px; }
.brand { font-weight: 700; font-size: 17px; }
#main-nav { display: flex; gap: 18px; }
#main-nav a { color: #cfe0f0; text-decoration: none; font-size: 14px; padding: 6px 2px; border-bottom: 2px solid transparent; }
#main-nav a.active, #main-nav a:hover { color: #fff; border-color: var(--accent); }
.topbar-right { display: flex; align-items: center; gap: 14px; font-size: 14px; }
.link-btn { background: none; border: none; color: #cfe0f0; cursor: pointer; font-size: 14px; }
.link-btn:hover { color: #fff; }

main#main-content { padding: 24px; max-width: 1200px; margin: 0 auto; }

/* ---------- CARDS / GRID ---------- */
.card { background: var(--card); border-radius: var(--radius); padding: 20px; box-shadow: 0 1px 3px rgba(0,0,0,.06); margin-bottom: 20px; }
.grid { display: grid; gap: 16px; }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 900px) { .grid-4 { grid-template-columns: repeat(2, 1fr); } .grid-2 { grid-template-columns: 1fr; } }

.kpi { text-align: center; }
.kpi .num { font-size: 30px; font-weight: 700; color: var(--primary); }
.kpi .label { color: var(--muted); font-size: 13px; margin-top: 4px; }

h1 { font-size: 22px; margin: 0 0 16px; }
h2 { font-size: 17px; margin: 0 0 12px; }

/* ---------- TABLE ---------- */
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); }
th { color: var(--muted); font-weight: 600; font-size: 12px; text-transform: uppercase; }
tr:hover td { background: #f8fafc; cursor: pointer; }

.badge { display: inline-block; padding: 3px 10px; border-radius: 999px; font-size: 12px; font-weight: 600; }
.badge-borrador { background: #e2e8f0; color: #475569; }
.badge-en_revision { background: #fef3c7; color: #92400e; }
.badge-en_aprobacion { background: #dbeafe; color: #1e40af; }
.badge-vigente { background: #dcfce7; color: #166534; }
.badge-obsoleto { background: #fee2e2; color: #991b1b; }
.badge-rechazado { background: #fee2e2; color: #991b1b; }

/* ---------- FORMS / TOOLBAR ---------- */
.toolbar { display: flex; gap: 10px; margin-bottom: 16px; flex-wrap: wrap; align-items: center; }
.toolbar input, .toolbar select { padding: 8px 10px; border: 1px solid var(--border); border-radius: 6px; font-size: 14px; }
button.primary { background: var(--primary); color: #fff; border: none; padding: 9px 18px; border-radius: 6px; cursor: pointer; font-weight: 600; font-size: 14px; }
button.primary:hover { background: var(--primary-dark); }
button.secondary { background: #fff; border: 1px solid var(--border); padding: 8px 16px; border-radius: 6px; cursor: pointer; font-size: 14px; }
button.danger { background: var(--danger); color: #fff; border: none; padding: 8px 16px; border-radius: 6px; cursor: pointer; }
button.success { background: var(--success); color: #fff; border: none; padding: 8px 16px; border-radius: 6px; cursor: pointer; }

.field { margin-bottom: 14px; }
.field label { display: block; font-size: 13px; color: var(--muted); margin-bottom: 4px; }
.field input, .field select, .field textarea { width: 100%; padding: 9px 10px; border: 1px solid var(--border); border-radius: 6px; font-size: 14px; }

/* ---------- MODAL ---------- */
.modal-overlay { position: fixed; inset: 0; background: rgba(15,23,42,.5); display: flex; align-items: center; justify-content: center; z-index: 100; padding: 20px; }
.modal { background: #fff; border-radius: var(--radius); padding: 28px; width: 100%; max-width: 640px; max-height: 88vh; overflow-y: auto; }
.modal h2 { margin-top: 0; }
.modal-close { float: right; cursor: pointer; font-size: 20px; color: var(--muted); background: none; border: none; }

.tag-pill { display: inline-block; background: #eef2ff; color: #4338ca; padding: 2px 10px; border-radius: 999px; font-size: 12px; margin-right: 4px; }
.code-mono { font-family: 'Courier New', monospace; font-weight: 700; color: var(--primary); }
.muted { color: var(--muted); font-size: 13px; }

.timeline-item { border-left: 2px solid var(--border); padding: 8px 0 8px 16px; margin-left: 4px; position: relative; }
.timeline-item::before { content: ''; width: 8px; height: 8px; border-radius: 50%; background: var(--accent); position: absolute; left: -5px; top: 14px; }

.toast { position: fixed; bottom: 24px; right: 24px; background: var(--text); color: #fff; padding: 12px 20px; border-radius: 8px; font-size: 14px; z-index: 200; box-shadow: 0 4px 14px rgba(0,0,0,.2); }
.toast.error { background: var(--danger); }
.toast.success { background: var(--success); }