:root {
    --navy: #0d3b56;
    --wine: #8a1f32;
    --bg: #f3f5f8;
    --line: #d5dde5;
    --ink: #1f2d3a;
}
* { box-sizing: border-box; }
body {
    margin: 0;
    font-family: Jost, Arial, sans-serif;
    background: var(--bg);
    color: var(--ink);
}
a { color: var(--navy); text-decoration: none; }
.login-wrap {
    min-height: 100vh;
    display: grid;
    place-items: center;
    background: linear-gradient(160deg, #0d3b56, #8a1f32);
    padding: 24px;
}
.login-card {
    width: min(420px, 100%);
    background: #fff;
    padding: 32px;
    border-radius: 10px;
    box-shadow: 0 20px 40px rgba(0,0,0,.18);
}
.login-card h1 {
    font-family: "Cormorant Garamond", serif;
    margin: 0 0 8px;
}
.muted { color: #667687; font-size: 14px; }
label { display: block; margin: 14px 0 6px; font-size: 14px; }
input[type="text"],
input[type="password"],
input[type="url"],
input[type="email"],
input[type="number"],
input[type="date"],
input[type="month"],
select,
textarea {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--line);
    border-radius: 6px;
    font: inherit;
    background: #fff;
}
textarea { min-height: 90px; resize: vertical; }
.btn {
    display: inline-block;
    border: 0;
    background: var(--navy);
    color: #fff;
    padding: 10px 16px;
    border-radius: 6px;
    cursor: pointer;
    font: inherit;
}
.btn-wine { background: var(--wine); }
.btn[hidden] { display: none; }
.btn-ghost { background: #fff; color: var(--navy); border: 1px solid var(--line); }
.alert {
    padding: 10px 12px;
    border-radius: 6px;
    margin: 0 0 16px;
    font-size: 14px;
}
.alert-error { background: #fde8ea; color: #8a1f32; }
.alert-ok { background: #e5f6ee; color: #146c43; }
.admin-shell { display: grid; grid-template-columns: 250px 1fr; min-height: 100vh; }
.admin-side {
    background: var(--navy);
    color: #fff;
    padding: 24px 16px;
}
.admin-side h2 {
    font-family: "Cormorant Garamond", serif;
    font-weight: 600;
    margin: 0 16px 24px;
    letter-spacing: .04em;
}
.admin-side a {
    display: block;
    color: #fff;
    padding: 10px 16px;
    border-radius: 6px;
    margin-bottom: 4px;
    opacity: .88;
}
.admin-side a.is-active,
.admin-side a:hover { background: rgba(255,255,255,.12); opacity: 1; }
.admin-main { padding: 28px; }
.admin-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    margin-bottom: 20px;
}
.card {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 10px;
    padding: 20px;
    margin-bottom: 18px;
}
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.filter-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 12px;
    align-items: end;
}
.is-hidden { display: none; }
.stat-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    margin-bottom: 18px;
}
.stat-box {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 10px;
    padding: 18px;
}
.stat-label { margin: 0; font-size: 13px; color: #667687; text-transform: uppercase; letter-spacing: .04em; }
.stat-value { margin: 8px 0 6px; font-size: 28px; font-weight: 600; color: var(--navy); line-height: 1.2; }
.bar {
    height: 8px;
    background: #e7eef3;
    border-radius: 99px;
    overflow: hidden;
    min-width: 80px;
}
.bar span {
    display: block;
    height: 100%;
    background: var(--navy);
    border-radius: 99px;
}
.country-cell { font-size: 16px; white-space: nowrap; }
.table { width: 100%; border-collapse: collapse; }
.table th, .table td { text-align: left; padding: 10px 8px; border-bottom: 1px solid var(--line); vertical-align: top; }
.actions { display: flex; gap: 8px; flex-wrap: wrap; }
.preview-img { max-width: 140px; max-height: 80px; object-fit: cover; border-radius: 6px; }
.help { font-size: 13px; color: #667687; margin-top: 6px; }
.admin-back-top {
    position: fixed;
    right: 16px;
    bottom: 18px;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--navy);
    color: #fff;
    display: grid;
    place-items: center;
    opacity: 0;
    pointer-events: none;
    transform: translateY(8px);
    transition: .2s ease;
    z-index: 50;
    font-size: 20px;
    box-shadow: 0 8px 18px rgba(13, 59, 86, .28);
}
.admin-back-top.is-visible {
    opacity: 1;
    pointer-events: auto;
    transform: none;
}
/* Chọn ảnh có sẵn trên server */
.pick-row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.pick-chosen { display: flex; gap: 10px; flex-wrap: wrap; align-items: flex-start; margin-top: 8px; }
.pick-chosen:empty { display: none; }
.pick-chosen figure {
    position: relative;
    margin: 0;
    width: 120px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 6px;
    overflow: hidden;
}
.pick-chosen img { display: block; width: 100%; height: 80px; object-fit: cover; }
.pick-chosen figcaption { font-size: 11px; padding: 4px 6px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.pick-chosen figure button {
    position: absolute; top: 4px; right: 4px;
    width: 22px; height: 22px; border: 0; border-radius: 50%;
    background: rgba(0,0,0,.6); color: #fff; cursor: pointer; line-height: 1;
}
.pick-chosen .help { flex-basis: 100%; margin: 0; }
.picker {
    width: min(1100px, calc(100vw - 32px));
    max-height: calc(100vh - 48px);
    padding: 0;
    border: 0;
    border-radius: 10px;
    box-shadow: 0 24px 60px rgba(0,0,0,.3);
    color: var(--ink);
}
.picker[open] { display: flex; flex-direction: column; }
.picker::backdrop { background: rgba(13, 59, 86, .45); }
.picker-head { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; padding: 16px 18px 0; }
.picker-head input { flex: 1 1 200px; width: auto; }
.picker-tabs { display: flex; gap: 6px; flex-wrap: wrap; }
.picker-tab {
    border: 1px solid var(--line); background: #fff; color: var(--navy);
    padding: 8px 12px; border-radius: 99px; cursor: pointer; font: inherit; font-size: 14px;
}
.picker-tab.is-active { background: var(--navy); color: #fff; border-color: var(--navy); }
.picker-hint { padding: 0 18px; }
.picker-grid {
    flex: 1;
    overflow-y: auto;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    grid-auto-rows: max-content;
    align-content: start;
    gap: 10px;
    padding: 6px 18px 18px;
    min-height: 200px;
}
.picker-item {
    position: relative;
    padding: 0;
    border: 2px solid transparent;
    border-radius: 8px;
    background: #f3f5f8;
    cursor: pointer;
    overflow: hidden;
    text-align: left;
    font: inherit;
}
.picker-item img { display: block; width: 100%; height: 112px; object-fit: cover; background: #e7eef3; }
.picker-item span {
    display: block; font-size: 12px; padding: 5px 7px;
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.picker-item:hover { border-color: var(--line); }
.picker-item.is-selected { border-color: var(--wine); }
.picker-item b {
    position: absolute; top: 6px; left: 6px;
    min-width: 24px; height: 24px; padding: 0 6px; border-radius: 99px;
    background: var(--wine); color: #fff; font-size: 13px;
    display: grid; place-items: center;
}
.picker-foot {
    display: flex; gap: 10px; align-items: center; justify-content: flex-end;
    padding: 12px 18px; border-top: 1px solid var(--line);
}
.picker-foot .muted { margin-right: auto; }
@media (max-width: 860px) {
    .admin-shell { grid-template-columns: 1fr; }
    .grid-2, .stat-grid { grid-template-columns: 1fr; }
}