:root {
    --bg: #0f172a;
    --bg-soft: #1e293b;
    --bg-card: #1e293b;
    --border: #334155;
    --text: #e2e8f0;
    --muted: #94a3b8;
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --danger: #ef4444;
    --radius: 12px;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.5;
}

a { color: inherit; text-decoration: none; }
.muted { color: var(--muted); }

/* ---------- Login ---------- */
.login-body {
    display: grid;
    place-items: center;
    min-height: 100vh;
    padding: 1rem;
}
.login-card {
    width: 100%;
    max-width: 380px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2rem;
    box-shadow: 0 20px 50px rgba(0, 0, 0, .35);
}
.login-title { margin: 0; font-size: 1.4rem; }
.login-sub { margin: .25rem 0 1.5rem; color: var(--muted); }

.field { display: block; margin-bottom: 1rem; }
.field span { display: block; font-size: .85rem; color: var(--muted); margin-bottom: .35rem; }
.field input {
    width: 100%;
    padding: .65rem .8rem;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text);
    font-size: .95rem;
}
.field input:focus { outline: 2px solid var(--primary); border-color: transparent; }

/* ---------- Botones ---------- */
.btn {
    display: inline-block;
    border: 1px solid transparent;
    border-radius: 8px;
    padding: .6rem 1rem;
    font-size: .9rem;
    cursor: pointer;
    font-family: inherit;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); }
.btn-ghost { background: transparent; border-color: var(--border); color: var(--text); }
.btn-ghost:hover { background: var(--bg); }
.btn-block { width: 100%; }
.btn-sm { padding: .4rem .7rem; font-size: .8rem; }

/* ---------- Alertas ---------- */
.alert { padding: .7rem .9rem; border-radius: 8px; margin-bottom: 1rem; font-size: .9rem; }
.alert-error { background: rgba(239, 68, 68, .12); border: 1px solid var(--danger); color: #fca5a5; }

/* ---------- Topbar ---------- */
.topbar { background: var(--bg-soft); border-bottom: 1px solid var(--border); }
.topbar-inner {
    max-width: 1100px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 1.5rem;
    padding: .8rem 1.25rem;
}
.brand { font-weight: 600; }
.nav { display: flex; gap: 1rem; flex: 1; }
.nav-link { color: var(--muted); font-size: .9rem; }
.nav-link:hover { color: var(--text); }
.user-box { display: flex; align-items: center; gap: .6rem; }
.user-name { font-size: .9rem; }
.logout-form { margin: 0; }

.badge { font-size: .7rem; padding: .15rem .5rem; border-radius: 999px; }
.badge-admin { background: rgba(99, 102, 241, .2); color: #a5b4fc; }
.badge-user { background: rgba(148, 163, 184, .2); color: var(--muted); }

/* ---------- Contenido ---------- */
.container { max-width: 1100px; margin: 0 auto; padding: 1.75rem 1.25rem; }
.page-head h1 { margin: 0 0 .25rem; font-size: 1.5rem; }

.kpi-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin: 1.5rem 0;
}
.kpi-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.1rem 1.2rem;
    display: flex;
    flex-direction: column;
    gap: .35rem;
}
.kpi-label { font-size: .8rem; color: var(--muted); }
.kpi-value { font-size: 1.8rem; font-weight: 600; }
.kpi-foot { font-size: .75rem; }

.panel {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.25rem 1.4rem;
}
.panel h2 { margin-top: 0; font-size: 1.1rem; }