:root {
    --bg: #f4f7fb;
    --card: #ffffff;
    --text: #1f2937;
    --muted: #6b7280;
    --blue: #2f67c1;
    --blue-dark: #214f98;
    --border: #d8e0ed;
    --danger: #b91c1c;
    --ok-bg: #ecfdf5;
    --ok-text: #065f46;
    --error-bg: #fef2f2;
    --error-text: #991b1b;
}
* { box-sizing: border-box; }
body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    color: var(--text);
    background: var(--bg);
}
a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }
.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
    padding: 14px 28px;
    color: #fff;
    background: linear-gradient(90deg, var(--blue-dark), var(--blue));
    box-shadow: 0 2px 8px rgba(0,0,0,.12);
}
.topbar div span { display: block; font-size: 12px; opacity: .85; }
.topbar nav { display: flex; gap: 14px; flex-wrap: wrap; }
.topbar nav a { color: #fff; font-weight: 600; font-size: 14px; }
.container { max-width: 1180px; margin: 0 auto; padding: 28px; }
h1 { margin: 0 0 18px; }
h2 { margin-top: 0; }
.card, .login-card, details.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 20px;
    margin-bottom: 18px;
    box-shadow: 0 2px 10px rgba(31,41,55,.05);
}
.login-card { max-width: 420px; margin: 80px auto; }
label { display: block; margin-bottom: 6px; font-weight: 700; font-size: 13px; }
input, select {
    width: 100%;
    padding: 10px 12px;
    margin-bottom: 14px;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: #fff;
    font-size: 14px;
}
button, .button {
    display: inline-block;
    border: none;
    border-radius: 10px;
    padding: 10px 15px;
    color: #fff;
    background: var(--blue);
    font-weight: 700;
    cursor: pointer;
}
button:hover, .button:hover { background: var(--blue-dark); text-decoration: none; }
button.danger { background: var(--danger); }
.button.secondary { background: #374151; }
.filters, .inline-form { display: flex; align-items: end; gap: 14px; flex-wrap: wrap; }
.filters > div, .inline-form > div { min-width: 220px; flex: 1; }
.inline-form.wide > div { min-width: 260px; }
.check { display: flex; align-items: center; gap: 8px; margin-bottom: 14px; }
.check input { width: auto; margin: 0; }
.grid { display: grid; gap: 16px; margin-bottom: 18px; }
.cards3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.stat {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 18px;
    box-shadow: 0 2px 10px rgba(31,41,55,.05);
}
.stat span { display: block; color: var(--muted); font-size: 13px; }
.stat strong { display: block; margin-top: 8px; font-size: 28px; }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; background: #fff; }
th, td { border: 1px solid var(--border); padding: 10px; text-align: left; }
th { background: var(--blue); color: #fff; }
.num, .right { text-align: right; }
.total-row td { background: #dce6f5; font-weight: 700; }
.flash { padding: 12px 14px; border-radius: 10px; margin-bottom: 16px; font-weight: 700; }
.flash.ok { background: var(--ok-bg); color: var(--ok-text); }
.flash.error { background: var(--error-bg); color: var(--error-text); }
.empty { padding: 25px; background: #fff; border-radius: 14px; border: 1px dashed var(--border); }
.actions { display: flex; gap: 10px; margin: 12px 0 18px; flex-wrap: wrap; }
.small-actions { margin-top: 14px; }
summary { cursor: pointer; font-weight: 700; }
@media (max-width: 820px) {
    .topbar { align-items: flex-start; flex-direction: column; }
    .cards3 { grid-template-columns: 1fr; }
    .container { padding: 18px; }
}