:root {
    --bg: #f4f5f7;
    --card-bg: #ffffff;
    --border: #dde1e6;
    --text: #1f2430;
    --muted: #6b7280;
    --primary: #1d4ed8;
    --primary-hover: #1e3fb8;
    --danger: #b91c1c;
    --ok: #15803d;
    --warn: #b45309;
}

* { box-sizing: border-box; }

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

.topbar {
    background: var(--card-bg);
    border-bottom: 1px solid var(--border);
    padding: 12px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.topbar h1 {
    font-size: 16px;
    margin: 0;
}

.topbar .user-info {
    font-size: 13px;
    color: var(--muted);
    display: flex;
    align-items: center;
    gap: 12px;
}

.topbar a { color: var(--primary); text-decoration: none; }
.topbar a:hover { text-decoration: underline; }

.topnav { display: flex; gap: 16px; margin-right: 8px; }
.topnav a { color: var(--text); font-size: 13px; }
.topnav a:hover { color: var(--primary); }

.page-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; }
.page-header h2 { margin: 0; }

.form-row { display: flex; gap: 16px; }
.form-row > div { flex: 1; }

fieldset { border: 1px solid var(--border); border-radius: 8px; margin: 0 0 16px; padding: 16px; }
legend { padding: 0 6px; font-size: 13px; color: var(--muted); }

.actions-cell { display: flex; gap: 10px; }
.actions-cell a, .actions-cell button.link {
    background: none; border: none; padding: 0; font-size: 13px; color: var(--primary);
    cursor: pointer; text-decoration: none;
}
.actions-cell a:hover, .actions-cell button.link:hover { text-decoration: underline; }
.actions-cell .danger { color: var(--danger); }

.help-text { font-size: 12px; color: var(--muted); margin: -12px 0 16px; }

.btn-secondary { background: #fff; color: var(--text); border: 1px solid var(--border); }
.btn-secondary:hover { background: #f3f4f6; }

.container {
    max-width: 960px;
    margin: 40px auto;
    padding: 0 16px;
}

.card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 24px;
}

.login-wrap {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-card { width: 100%; max-width: 360px; }

.login-card h1 { font-size: 20px; margin: 0 0 4px; }
.login-card p.subtitle { color: var(--muted); margin: 0 0 24px; font-size: 13px; }

label { display: block; font-size: 13px; margin-bottom: 6px; color: var(--muted); }

input[type=email], input[type=password], input[type=text], input[type=number], select {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 14px;
    margin-bottom: 16px;
}

button, .btn {
    display: inline-block;
    background: var(--primary);
    color: #fff;
    border: none;
    padding: 10px 16px;
    border-radius: 6px;
    font-size: 14px;
    cursor: pointer;
    text-decoration: none;
}

button:hover, .btn:hover { background: var(--primary-hover); }

.alert {
    padding: 10px 14px;
    border-radius: 6px;
    font-size: 13px;
    margin-bottom: 16px;
}

.alert-error { background: #fef2f2; color: var(--danger); border: 1px solid #fecaca; }
.alert-info { background: #eff6ff; color: var(--primary); border: 1px solid #bfdbfe; }

table { width: 100%; border-collapse: collapse; font-size: 13px; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); }
th { color: var(--muted); font-weight: 600; }

.badge { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 12px; }
.badge-ok { background: #dcfce7; color: var(--ok); }
.badge-warn { background: #fef3c7; color: var(--warn); }
.badge-danger { background: #fee2e2; color: var(--danger); }
.badge-muted { background: #e5e7eb; color: var(--muted); }

.almacen-tabs { display: flex; gap: 8px; margin-bottom: 20px; }
.almacen-tabs a {
    padding: 8px 14px;
    border: 1px solid var(--border);
    border-radius: 6px;
    text-decoration: none;
    color: var(--text);
    font-size: 13px;
}
.almacen-tabs a.active { background: var(--primary); color: #fff; border-color: var(--primary); }

.empty-state { color: var(--muted); font-size: 13px; padding: 24px 0; text-align: center; }