:root {
    font-family: Arial, Helvetica, sans-serif;
    color: #1d2733;
    background: #f3f5f8;
}

* { box-sizing: border-box; }
body { margin: 0; }
a { color: #2457a6; text-decoration: none; }
a:hover { text-decoration: underline; }
button, input, select { font: inherit; }
button {
    border: 0;
    border-radius: 8px;
    background: #1f4f8f;
    color: white;
    padding: 10px 16px;
    cursor: pointer;
}
button.secondary { background: #e5eaf0; color: #243446; }
button.danger { background: #a93434; }

.auth-body {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 24px;
}
.auth-card {
    width: min(420px, 100%);
    background: white;
    border: 1px solid #dce2e8;
    border-radius: 14px;
    padding: 30px;
    box-shadow: 0 10px 30px rgba(40, 55, 75, 0.08);
}
.brand-mark {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: grid;
    place-items: center;
    background: #1f4f8f;
    color: white;
    font-weight: 700;
}
h1, h2, h3 { margin-top: 0; }
.muted { color: #687789; }
.stack-form { display: grid; gap: 14px; margin-top: 24px; }
label { display: grid; gap: 6px; font-size: 14px; font-weight: 600; }
input, select {
    width: 100%;
    border: 1px solid #c8d0da;
    border-radius: 8px;
    padding: 10px 12px;
    background: white;
}
.form-message { min-height: 18px; margin: 0; color: #a93434; }
.form-message.success { color: #2b6c3d; }
.auth-links { display: flex; justify-content: space-between; margin-top: 18px; font-size: 14px; }

.topbar {
    height: 62px;
    background: #17283d;
    color: white;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
}
.topbar a { color: white; }
.layout { display: grid; grid-template-columns: 220px 1fr; min-height: calc(100vh - 62px); }
.sidebar {
    background: white;
    border-right: 1px solid #dce2e8;
    padding: 20px 14px;
}
.sidebar a { display: block; padding: 10px 12px; border-radius: 7px; margin-bottom: 4px; }
.sidebar a:hover { background: #edf2f7; text-decoration: none; }
.content { padding: 28px; min-width: 0; }
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 16px; }
.card {
    background: white;
    border: 1px solid #dce2e8;
    border-radius: 10px;
    padding: 18px;
}
.panel {
    background: white;
    border: 1px solid #dce2e8;
    border-radius: 10px;
    padding: 20px;
    margin-bottom: 18px;
}
.grid-form { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.grid-form > label { min-width: 0; }
.grid-form .full { grid-column: 1 / -1; }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 10px; border-bottom: 1px solid #e3e8ee; font-size: 14px; }
th { background: #f7f9fb; }
.badge { display: inline-block; padding: 4px 8px; border-radius: 99px; background: #e8eef6; font-size: 12px; }
.error-box { background: #fff1f1; border: 1px solid #e6b0b0; color: #7d2e2e; padding: 12px; border-radius: 8px; }
.success-box { background: #eff9f1; border: 1px solid #b7d8bd; color: #285f34; padding: 12px; border-radius: 8px; }
.toolbar { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; margin-bottom: 16px; }

@media (max-width: 760px) {
    .layout { grid-template-columns: 1fr; }
    .sidebar { display: flex; overflow-x: auto; border-right: 0; border-bottom: 1px solid #dce2e8; }
    .sidebar a { white-space: nowrap; }
    .grid-form { grid-template-columns: 1fr; }
}

.check-label {display:flex;align-items:center;gap:10px;}
.check-label input {width:18px;height:18px;}
.form-actions {margin-top:20px;}
button:disabled {opacity:.5;cursor:not-allowed;}
button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible {outline:3px solid #e29e24;outline-offset:3px;}
.seat-grid {display:grid;grid-template-columns:repeat(var(--columns),minmax(110px,1fr));gap:8px;overflow-x:auto;padding-bottom:8px;}
.seat {display:flex;flex-direction:column;gap:5px;border:1px solid #c8d0da;border-radius:6px;padding:10px;background:#f7f9fb;min-height:95px;font-size:12px;}
.seat.occupied {background:#e8f2ff;border-color:#5a87b6;}
.seat.accessible {border:2px solid #2b6c3d;}
.seat.blocked {background:#ececec;color:#666;}
.sidebar {max-height:calc(100vh - 62px);overflow-y:auto;position:sticky;top:0;}
#notice,#message {overflow-wrap:anywhere;}
@media(max-width:760px) {.sidebar {position:static;max-height:none;} .content {padding:16px;} .topbar {padding:0 14px;}}