:root {
    --primary: #0d2f7e;
    --primary-dark: #08215a;
    --accent: #337ab7;
    --bg: #f4f6fa;
    --card: #ffffff;
    --border: #e2e8f0;
    --text: #1f2937;
    --muted: #6b7280;
    --ok: #067647;
    --warn: #b54708;
}
* { box-sizing: border-box; }
body {
    margin: 0;
    font-family: "Segoe UI", Roboto, Tahoma, Arial, sans-serif;
    color: var(--text);
    background: var(--bg);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.site-header { background: var(--primary); color: #fff; }
.header-inner {
    max-width: 1200px; margin: 0 auto; padding: 14px 20px;
    display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap;
}
.brand { display: flex; align-items: center; gap: 12px; color: #fff; }
.brand:hover { text-decoration: none; }
.brand img { height: 46px; }
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-text strong { font-size: 17px; letter-spacing: .3px; }
.brand-text small { color: #c7d4ee; font-size: 12.5px; }
.userbox { font-size: 13.5px; display: flex; gap: 14px; align-items: center; color: #dbe4f7; }
.userbox a { color: #fff; font-weight: 600; }

.mainnav {
    max-width: 1200px; margin: 0 auto; padding: 0 20px;
    display: flex; flex-wrap: wrap; gap: 4px;
    border-top: 1px solid rgba(255,255,255,.15);
}
.mainnav a {
    color: #e6ecfb; padding: 10px 12px; font-size: 14px; border-bottom: 3px solid transparent;
}
.mainnav a:hover { background: rgba(255,255,255,.08); text-decoration: none; }
.mainnav a.active { border-bottom-color: #ffd54a; color: #fff; font-weight: 600; }

.container { max-width: 1200px; margin: 0 auto; width: 100%; padding: 22px 20px; flex: 1; }

.hero { background: linear-gradient(120deg, var(--primary), #1c4aa0); color: #fff; border-radius: 12px; padding: 30px; margin-bottom: 22px; }
.hero h1 { margin: 0 0 8px; font-size: 26px; }
.hero p { margin: 0; color: #d6e0f7; }

.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 14px; margin-bottom: 22px; }
.stat-card { background: var(--card); border: 1px solid var(--border); border-radius: 10px; padding: 18px; text-align: center; }
.stat-value { font-size: 28px; font-weight: 700; color: var(--primary); }
.stat-label { color: var(--muted); font-size: 13.5px; margin-top: 4px; }

.quick-links { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 22px; }
.quick { background: #fff; border: 1px solid var(--border); border-radius: 8px; padding: 10px 16px; font-weight: 600; }
.quick:hover { border-color: var(--accent); }

.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.three-col { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
@media (max-width: 900px) { .two-col, .three-col { grid-template-columns: 1fr; } }

.panel { background: var(--card); border: 1px solid var(--border); border-radius: 10px; padding: 18px; margin-bottom: 18px; }
.panel h2 { margin: 0 0 14px; font-size: 17px; color: var(--primary-dark); }

.item-list { list-style: none; margin: 0; padding: 0; }
.item-list li { padding: 10px 0; border-bottom: 1px dashed var(--border); }
.item-list li:last-child { border-bottom: none; }
.item-title a { font-weight: 600; }
.item-meta { display: flex; flex-wrap: wrap; gap: 10px; color: var(--muted); font-size: 12.5px; margin-top: 4px; }
.item-meta .author { color: #374151; font-weight: 600; }

.badge { background: #eef2ff; color: #3730a3; border-radius: 20px; padding: 2px 9px; font-size: 11.5px; display: inline-block; }
.status { background: #fff7ed; color: var(--warn); border-radius: 20px; padding: 2px 9px; font-size: 11.5px; }
.code { font-family: ui-monospace, monospace; background: #f1f5f9; padding: 1px 6px; border-radius: 4px; }
.muted { color: var(--muted); }

.page-head { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-bottom: 14px; }
.page-head h1 { font-size: 22px; margin: 0; }
.search { display: flex; gap: 8px; }
.search input { padding: 9px 12px; border: 1px solid var(--border); border-radius: 8px; min-width: 260px; }
.search button { padding: 9px 16px; border: none; background: var(--primary); color: #fff; border-radius: 8px; cursor: pointer; }
.search .clear { align-self: center; font-size: 13px; }
.result-count { color: var(--muted); margin-bottom: 10px; }

table.grid { width: 100%; border-collapse: collapse; background: #fff; border: 1px solid var(--border); border-radius: 10px; overflow: hidden; }
table.grid th { background: var(--primary); color: #fff; text-align: left; padding: 11px 12px; font-size: 12.5px; text-transform: uppercase; }
table.grid td { padding: 11px 12px; border-top: 1px solid var(--border); vertical-align: top; font-size: 14px; }
table.grid tr:hover td { background: #f8fafc; }
table.grid .title { font-weight: 600; }
table.grid .meta { display: flex; gap: 10px; flex-wrap: wrap; color: var(--muted); font-size: 12.5px; margin-top: 4px; }
table.grid.compact td, table.grid.compact th { padding: 7px 9px; font-size: 13px; }

.cards, .cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 14px; }
.person-card { background: #fff; border: 1px solid var(--border); border-radius: 10px; padding: 16px; color: inherit; }
.person-card:hover { border-color: var(--accent); text-decoration: none; box-shadow: 0 4px 14px rgba(13,47,126,.08); }
.person-name { font-weight: 700; color: var(--primary-dark); }
.person-meta { display: flex; gap: 8px; margin: 6px 0; font-size: 13px; color: var(--muted); }
.person-major { font-size: 13px; color: var(--muted); }

.detail-head { margin-bottom: 18px; }
.detail-head .back { font-size: 13.5px; }
.detail-head h1 { font-size: 22px; margin: 8px 0; }
dl.detail { display: grid; grid-template-columns: 240px 1fr; gap: 0; background: #fff; border: 1px solid var(--border); border-radius: 10px; overflow: hidden; }
dl.detail dt { background: #f8fafc; padding: 10px 14px; font-weight: 600; border-top: 1px solid var(--border); font-size: 13.5px; }
dl.detail dd { margin: 0; padding: 10px 14px; border-top: 1px solid var(--border); }
dl.detail dt:first-of-type, dl.detail dd:first-of-type { border-top: none; }

.stat-inline { display: flex; gap: 28px; margin-bottom: 18px; }
.stat-inline div { background: #fff; border: 1px solid var(--border); border-radius: 10px; padding: 14px 22px; text-align: center; }
.stat-inline strong { display: block; font-size: 24px; color: var(--primary); }
.stat-inline span { color: var(--muted); font-size: 13px; }

.pager { display: flex; gap: 16px; align-items: center; justify-content: center; margin: 22px 0; color: var(--muted); }

.login-wrap { display: flex; justify-content: center; padding: 40px 0; }
.login-card { background: #fff; border: 1px solid var(--border); border-radius: 12px; padding: 28px; width: 360px; display: flex; flex-direction: column; gap: 14px; }
.login-card h1 { margin: 0; font-size: 20px; color: var(--primary-dark); }
.login-card label { display: flex; flex-direction: column; gap: 6px; font-size: 13.5px; font-weight: 600; }
.login-card input { padding: 10px 12px; border: 1px solid var(--border); border-radius: 8px; font-weight: 400; }
.login-card button { padding: 11px; border: none; background: var(--primary); color: #fff; border-radius: 8px; cursor: pointer; font-weight: 600; }
.error { background: #fef2f2; color: #b91c1c; border: 1px solid #fecaca; border-radius: 8px; padding: 10px; font-size: 13.5px; }

.site-footer { background: var(--primary-dark); color: #b9c6e4; text-align: center; padding: 16px; font-size: 13px; margin-top: auto; }

/* ------------------------------- Admin ------------------------------- */
.card { background: var(--card); border: 1px solid var(--border); border-radius: 10px; padding: 20px; }
table.kv { width: 100%; border-collapse: collapse; }
table.kv th { text-align: left; width: 240px; padding: 9px 12px; background: #f8fafc; font-size: 13.5px; border-bottom: 1px solid var(--border); }
table.kv td { padding: 9px 12px; border-bottom: 1px solid var(--border); }
.btn, .btn-secondary {
    display: inline-block; padding: 9px 16px; border-radius: 8px; font-weight: 600; font-size: 14px;
    border: 1px solid transparent; cursor: pointer;
}
.btn { background: var(--primary); color: #fff; }
.btn:hover { background: var(--primary-dark); text-decoration: none; }
.btn-secondary { background: #fff; color: var(--primary); border-color: var(--border); }
.btn-secondary:hover { border-color: var(--accent); text-decoration: none; }
table.grid td.actions { white-space: nowrap; }
table.grid .inline { display: inline; margin: 0; }
.link-danger { background: none; border: none; color: #b91c1c; cursor: pointer; padding: 0; font-size: 14px; font-family: inherit; }
.link-danger:hover { text-decoration: underline; }
.alert { border-radius: 8px; padding: 10px 14px; margin-bottom: 14px; font-size: 14px; }
.alert-error { background: #fef2f2; color: #b91c1c; border: 1px solid #fecaca; }
.alert-ok { background: #ecfdf5; color: var(--ok); border: 1px solid #a7f3d0; }
.form-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 14px; }
.form-narrow { max-width: 440px; }
.field { display: flex; flex-direction: column; gap: 6px; }
.field label { font-size: 13px; font-weight: 600; color: #374151; }
.field input, .field textarea, .field select {
    padding: 9px 11px; border: 1px solid var(--border); border-radius: 8px; font-size: 14px; font-family: inherit;
}
.field textarea { resize: vertical; }
.form-actions { grid-column: 1 / -1; display: flex; gap: 10px; margin-top: 8px; }
.badge-ok { background: #ecfdf5; color: var(--ok); }
.badge-no { background: #fef2f2; color: #b91c1c; }
.badge-wait { background: #fffbeb; color: #b45309; }
.form-card { background: #fff; border: 1px solid var(--border); border-radius: 10px; padding: 18px; margin-bottom: 22px; max-width: 720px; }
.form-card h2 { margin: 0 0 12px; font-size: 17px; }
.form-card label { display: block; font-size: 13px; font-weight: 600; color: #374151; margin-bottom: 12px; }
.form-card input[type="text"], .form-card textarea {
    display: block; width: 100%; margin-top: 6px; padding: 9px 11px;
    border: 1px solid var(--border); border-radius: 8px; font-size: 14px; font-family: inherit;
}
.form-card textarea { resize: vertical; }
.req { color: #b91c1c; }
.btn-sm { padding: 5px 10px; font-size: 13px; }
.inline-form { display: inline-flex; gap: 6px; margin: 0; }
.check { display: flex; align-items: center; gap: 8px; font-weight: 400; }
.check input { width: auto; }
tr.row-hidden { background: #fff7ed; }
tr.row-hidden td { color: #92400e; }
.btn-edit-float {
    position: fixed; right: 24px; bottom: 24px; z-index: 60;
    background: var(--primary); color: #fff; border: none; border-radius: 999px;
    padding: 12px 20px; font-size: 15px; cursor: pointer; box-shadow: 0 6px 18px rgba(0,0,0,.25);
}
.btn-edit-float:hover { background: var(--primary-dark); }
.modal { display: none; position: fixed; inset: 0; background: rgba(0,0,0,.45); z-index: 100; overflow: auto; }
.modal-content {
    background: #fff; max-width: 960px; margin: 36px auto; padding: 22px 24px;
    border-radius: 12px; box-shadow: 0 12px 40px rgba(0,0,0,.3);
}
.modal-content h2 { margin: 0 0 16px; font-size: 19px; }
.modal-close { float: right; font-size: 28px; line-height: 1; cursor: pointer; color: #6b7280; }
.modal-close:hover { color: #111827; }
.tabs { display: flex; gap: 8px; border-bottom: 2px solid var(--border); margin: 8px 0 16px; flex-wrap: wrap; }
.tab-btn {
    background: #f3f4f6; border: 1px solid var(--border); border-bottom: none;
    padding: 9px 16px; border-radius: 8px 8px 0 0; cursor: pointer; font-size: 14px; color: #374151;
}
.tab-btn:hover { background: #e5e7eb; }
.tab-btn.active { background: #fff; color: var(--primary); font-weight: 600; }
.tab-panel { display: none; }
.tab-panel.active { display: block; }