:root {
    --bg: #f4f5f7;
    --card: #ffffff;
    --ink: #1a1a1a;
    --muted: #6b7280;
    --red: #df1e39;        /* color corporativo VOPSA */
    --red-d: #b3162d;
    --black: #1a1a1a;
    --line: #e3e6ea;
    --ok-bg: #e6f4ea; --ok-ink: #1e6b39;
    --err-bg: #fdecea; --err-ink: #b3162d;
    --info-bg: #eef2f7; --info-ink: #1a1a1a;
}
* { box-sizing: border-box; }
body {
    margin: 0; font-family: -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
    background: var(--bg); color: var(--ink); font-size: 15px;
}
a { color: var(--red); }

/* Barra superior: blanca con el logo y acento rojo corporativo */
.topbar {
    display: flex; align-items: center; gap: 24px;
    background: #fff; padding: 0 22px; height: 64px;
    border-bottom: 3px solid var(--red);
    box-shadow: 0 1px 4px rgba(0,0,0,.06);
}
.brand { display: flex; align-items: center; }
.brand img { height: 34px; width: auto; display: block; }
.nav { display: flex; gap: 2px; flex: 1; }
.nav a {
    color: var(--black); text-decoration: none; padding: 8px 14px; border-radius: 6px;
    font-size: 14px; font-weight: 600;
}
.nav a:hover { background: #f1f2f4; color: var(--red); }
.nav a.active { background: var(--red); color: #fff; }
.logout { display: flex; align-items: center; gap: 10px; }
.user { color: var(--muted); font-size: 13px; }
.container { max-width: 1000px; margin: 24px auto; padding: 0 20px; }
.foot { text-align: center; color: var(--muted); font-size: 13px; padding: 24px; }
h1 { font-size: 24px; margin: 0 0 6px; color: var(--black); }
h2 { font-size: 18px; margin: 0 0 12px; color: var(--black); }
h3 { color: var(--black); }
.muted { color: var(--muted); }
.hint { color: var(--muted); font-size: 13px; margin-top: 10px; }
.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
@media (max-width: 760px) { .grid { grid-template-columns: 1fr; } .topbar { gap: 12px; } }
.card {
    background: var(--card); border: 1px solid var(--line); border-radius: 10px;
    padding: 20px; margin-bottom: 20px;
}
.form label { display: block; margin-bottom: 14px; font-weight: 600; font-size: 14px; }
.form input[type=text], .form input[type=password], .form input[type=file], .form select {
    display: block; width: 100%; margin-top: 6px; padding: 9px 10px;
    border: 1px solid #cbd5e1; border-radius: 7px; font-size: 14px; font-weight: 400; background: #fff;
}
.form input:focus, .form select:focus { outline: none; border-color: var(--red); box-shadow: 0 0 0 3px rgba(223,30,57,.12); }
.btn {
    display: inline-block; padding: 9px 16px; border-radius: 7px; border: 1px solid #cbd5e1;
    background: #fff; color: var(--ink); text-decoration: none; cursor: pointer; font-size: 14px; font-weight: 600;
}
.btn:hover { background: #f1f2f4; }
.btn-primary { background: var(--red); border-color: var(--red); color: #fff; }
.btn-primary:hover { background: var(--red-d); border-color: var(--red-d); }
.btn-ghost { background: transparent; border-color: transparent; color: var(--muted); }
.btn-ghost:hover { background: #f1f2f4; color: var(--black); }
.row { margin-top: 8px; }
.form-inline { margin-top: 12px; }
.flash { padding: 11px 14px; border-radius: 8px; margin-bottom: 14px; font-size: 14px; }
.flash-success { background: var(--ok-bg); color: var(--ok-ink); }
.flash-error { background: var(--err-bg); color: var(--err-ink); }
.flash-info { background: var(--info-bg); color: var(--info-ink); }
table { width: 100%; border-collapse: collapse; }
.kv th { text-align: left; color: var(--muted); font-weight: 600; padding: 5px 10px 5px 0; vertical-align: top; white-space: nowrap; }
.kv td { padding: 5px 0; }
.list { margin-top: 10px; }
.list th, .list td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--line); font-size: 14px; }
.list thead th { color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: .03em; }
.list tfoot th { border-top: 2px solid var(--line); font-size: 14px; color: var(--black); }
.login-wrap { max-width: 380px; margin: 7vh auto; }
.login-logo { text-align: center; margin-bottom: 22px; }
.login-logo img { height: 56px; width: auto; }
.result h3 { margin-top: 20px; }
.warnings { list-style: none; padding: 0; margin: 8px 0 0; }
.warnings li { padding: 8px 0; border-bottom: 1px solid var(--line); font-size: 14px; }
.tag {
    display: inline-block; background: #fde7ea; color: var(--red-d); border-radius: 5px;
    padding: 1px 7px; font-size: 12px; font-weight: 700; margin-right: 6px;
}
.btn + .btn { margin-left: 8px; }