* { box-sizing: border-box; }
body { margin: 0; font-family: system-ui, -apple-system, "Segoe UI", Arial, sans-serif; font-size: 15px; color: #222; background: #f5f6f8; }
.wrap { padding: 0 20px; }
main.wrap { padding-top: 20px; padding-bottom: 40px; }
a { color: #1a5fb4; }
h1 { font-size: 24px; } h2 { font-size: 19px; margin-top: 28px; }

.topbar { background: #1f2a3a; color: #fff; }
.topbar .wrap { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; padding-top: 10px; padding-bottom: 10px; }
.topbar .brand { color: #fff; font-weight: bold; font-size: 18px; text-decoration: none; }
.topbar nav { display: flex; gap: 4px; flex-wrap: wrap; }
.topbar nav a { color: #cfd8e3; text-decoration: none; padding: 6px 10px; border-radius: 4px; }
.topbar nav a:hover { background: #32415a; color: #fff; }
.topbar nav a.nav-warn { color: #ffd28a; }

.flash { background: #d9f2e3; border: 1px solid #7ec79a; padding: 10px 14px; border-radius: 4px; margin-bottom: 16px; }
.error { background: #fde2e2; border: 1px solid #e89; padding: 10px 14px; border-radius: 4px; margin-bottom: 16px; }

table { border-collapse: collapse; background: #fff; width: 100%; }
th, td { border: 1px solid #d8dde4; padding: 6px 8px; text-align: left; vertical-align: top; }
th { background: #eef1f5; font-weight: 600; }
tr.pending { background: #fff7df; }
tr.inactive-row td { color: #999; background: #f0f0f0; }
tr.course-hidden { background: #fdeaea; }

.btn, button { display: inline-block; padding: 7px 14px; border: 1px solid #1a5fb4; background: #1a5fb4; color: #fff; border-radius: 4px; cursor: pointer; font-size: 14px; text-decoration: none; }
.btn:hover, button:hover { background: #14497e; }
.btn-secondary { background: #fff; color: #1a5fb4; }
.btn-secondary:hover { background: #e8eef7; color: #14497e; }
.btn-danger { background: #c01c28; border-color: #c01c28; }
.btn-danger:hover { background: #92141d; }
.btn-success { background: #26a269; border-color: #26a269; }
.btn-success:hover { background: #1c7d50; }
.btn-mini { padding: 2px 7px; font-size: 12px; }

.pay-cell { min-width: 80px; }
.pay-input { width: 70px; padding: 3px 5px; border: 1px solid #c6ccd4; border-radius: 3px; }
.pay-input.changed { border-color: #e5a50a; background: #fffbe8; }
.btn-save { background: #26a269; border-color: #26a269; display: block; margin-top: 3px; }
.btn-comment { background: #fff; color: #666; border-color: #c6ccd4; display: block; margin-top: 3px; }
.btn-comment:hover { background: #eee; color: #333; }
.pay-comment { font-size: 12px; color: #555; margin-top: 3px; max-width: 140px; white-space: pre-wrap; background: #f4f6e8; border: 1px solid #e0e4c8; border-radius: 3px; padding: 2px 5px; }
.hidden { display: none; }

form.box, .box { background: #fff; border: 1px solid #d8dde4; border-radius: 6px; padding: 18px; margin: 14px 0; }
label { display: block; margin: 10px 0 4px; font-weight: 600; }
input[type=text], input[type=email], input[type=password], input[type=number], textarea, select {
    width: 100%; max-width: 420px; padding: 7px 9px; border: 1px solid #c6ccd4; border-radius: 4px; font-size: 14px; font-family: inherit;
}
textarea { min-height: 90px; }
form .btn, form button { margin-top: 14px; }

.cols { display: flex; gap: 24px; flex-wrap: wrap; }
.cols > div { flex: 1; min-width: 300px; }

.course-list { list-style: none; padding: 0; }
.course-list li { background: #fff; border: 1px solid #d8dde4; border-radius: 6px; padding: 12px 16px; margin-bottom: 8px; display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.course-list li.dim { background: #fbeaea; }
.course-list li .grow { flex: 1; }
.course-list li img { width: 60px; height: 45px; object-fit: cover; border-radius: 4px; }

.course-photo { max-width: 320px; border-radius: 6px; display: block; margin: 10px 0; }
.muted { color: #888; }
.comment-item { background: #fff; border: 1px solid #d8dde4; border-radius: 6px; padding: 10px 14px; margin-bottom: 8px; }
.comment-item .meta { font-size: 12px; color: #888; margin-bottom: 4px; }
.inline-form { display: inline; }
.table-scroll { overflow-x: auto; }