:root {
    --mau-chinh: #d4392c;
    --mau-chinh-dam: #a8291f;
    --mau-vang: #f5b942;
    --mau-nen: #fbf7f0;
    --mau-chu: #2b2622;
    --mau-vien: #e8ddc8;
    --mau-thanh-cong: #2f7d4f;
    --mau-loi: #c0392b;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background: var(--mau-nen);
    color: var(--mau-chu);
    line-height: 1.5;
}

.container {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.site-header {
    background: var(--mau-chinh);
    color: #fff;
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
}

.logo {
    color: #fff;
    text-decoration: none;
    font-size: 22px;
    font-weight: 700;
}

.logo span { color: var(--mau-vang); }

.main-nav a {
    color: #fff;
    text-decoration: none;
    margin-left: 24px;
    font-weight: 500;
}

.main-nav a:hover { color: var(--mau-vang); }

.nav-nguoi-dung {
    color: #fff;
    margin-left: 24px;
    font-weight: 500;
    opacity: 0.85;
}

/* Alerts */
.alert {
    padding: 12px 16px;
    border-radius: 8px;
    margin: 20px 0;
}

.alert-success { background: #e3f4e9; color: var(--mau-thanh-cong); border: 1px solid #b9e0c6; }
.alert-error { background: #fbe7e5; color: var(--mau-loi); border: 1px solid #f1c1bb; }
.alert-error ul { margin: 0; padding-left: 20px; }

/* Banner thành công sau khi mua vé */
.banner-thanh-cong {
    background: #fff;
    border: 1px solid var(--mau-vien);
    border-radius: 16px;
    padding: 32px;
    margin: 24px 0;
    text-align: center;
}

.icon-thanh-cong { width: 80px; height: 80px; }
.banner-thanh-cong h2 { margin: 16px 0 4px; }
.banner-thanh-cong p { margin: 0; }

/* Hero */
.hero-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 20px;
}

.hero {
    background: linear-gradient(135deg, var(--mau-chinh), var(--mau-chinh-dam));
    color: #fff;
    border-radius: 16px;
    padding: 32px;
    margin: 24px 0;
    text-align: center;
}

.hero h1, .hero h2 { margin-top: 0; }
.hero-date { opacity: 0.9; }

.so-trung-thuong {
    display: flex;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
    margin: 20px 0;
}

.so-nho { justify-content: flex-start; }

.vien-so {
    width: 46px;
    height: 46px;
    border-radius: 50%;
    background: #fff;
    color: var(--mau-chinh-dam);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 18px;
}

.vien-so.dac-biet {
    background: var(--mau-vang);
    color: var(--mau-chinh-dam);
    border: 3px solid #fff;
}

.gia-tri-giai { font-size: 18px; font-weight: 600; }

.btn {
    display: inline-block;
    padding: 10px 22px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    border: none;
    cursor: pointer;
    font-size: 15px;
}

.btn-primary {
    background: var(--mau-vang);
    color: var(--mau-chinh-dam);
}

.btn-primary:hover { background: #e0a933; }
.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; }

/* Table */
.bang-ky-quay {
    width: 100%;
    border-collapse: collapse;
    background: #fff;
    border-radius: 10px;
    overflow: hidden;
}

.bang-ky-quay th, .bang-ky-quay td {
    padding: 12px 14px;
    text-align: left;
    border-bottom: 1px solid var(--mau-vien);
}

.bang-ky-quay th { background: #f3ece0; }

.badge {
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
}

.badge-done { background: #e3f4e9; color: var(--mau-thanh-cong); }
.badge-pending { background: #fdf1de; color: #b3791b; }
.badge-waiting { background: #eee7f6; color: #6b4fa0; }

/* Quản trị */
.admin-nav {
    display: flex;
    gap: 20px;
    margin: 16px 0 8px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--mau-vien);
}

.admin-nav a {
    color: var(--mau-chinh-dam);
    text-decoration: none;
    font-weight: 600;
}

.form-sua-ve {
    background: #f9f5ee;
    border-radius: 8px;
    padding: 16px;
}

/* Chi tiết kỳ */
.link-back, .link-nho {
    color: var(--mau-chinh-dam);
    text-decoration: none;
    font-weight: 600;
}

.chi-tiet-ky {
    background: #fff;
    border-radius: 12px;
    padding: 24px;
    margin-top: 16px;
    border: 1px solid var(--mau-vien);
}

/* Form mua vé */
.form-mua-ve {
    background: #fff;
    border-radius: 12px;
    padding: 24px;
    margin-top: 16px;
    border: 1px solid var(--mau-vien);
}

.form-group { margin-bottom: 18px; }

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-weight: 600;
}

.form-group input, .form-group select {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--mau-vien);
    border-radius: 8px;
    font-size: 15px;
}

.luoi-chon-so {
    display: grid;
    grid-template-columns: repeat(9, 1fr);
    gap: 8px;
}

.o-so {
    padding: 10px 0;
    border: 1px solid var(--mau-vien);
    background: #fff;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
}

.o-so:hover { border-color: var(--mau-chinh); }

.o-so.da-chon {
    background: var(--mau-chinh);
    color: #fff;
    border-color: var(--mau-chinh-dam);
}

.trang-thai-chon { margin-top: 10px; font-weight: 600; }

#btn-them-bo-so { margin-top: 12px; }

.danh-sach-bo-so {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.dong-bo-so {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
    background: #f9f5ee;
    border: 1px solid var(--mau-vien);
    border-radius: 8px;
    padding: 8px 10px;
}

.nhan-bo-so {
    width: 26px;
    height: 26px;
    border-radius: 50%;
    background: var(--mau-chinh);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 13px;
    flex-shrink: 0;
}

.dong-bo-so .vien-so {
    width: 34px;
    height: 34px;
    font-size: 14px;
}

.nut-xoa-bo-so {
    margin-left: auto;
    background: none;
    border: none;
    color: var(--mau-loi);
    font-weight: 600;
    cursor: pointer;
    padding: 4px 8px;
}

/* Vé của tôi */
.danh-sach-ve {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 16px;
    margin-top: 16px;
}

.the-ve {
    background: #fff;
    border: 1px solid var(--mau-vien);
    border-radius: 12px;
    padding: 18px;
}

.the-ve-header {
    display: flex;
    justify-content: space-between;
    font-size: 13px;
    color: #8a7f6d;
    margin-bottom: 8px;
}

.ma-ve { font-weight: 700; color: var(--mau-chinh-dam); }
.ten-san-pham { font-weight: 600; margin: 4px 0 10px; }
.thong-tin-nguoi-mua { font-size: 14px; color: #6b6255; margin: 10px 0; }

/* Footer */
.site-footer {
    margin-top: 40px;
    padding: 24px 0;
    text-align: center;
    color: #8a7f6d;
    font-size: 14px;
    border-top: 1px solid var(--mau-vien);
}

.footer-note { font-size: 12px; }

/* Header/tiêu đề trang có nút hành động bên phải (admin, quản lý vé...) */
.header-trang {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px 16px;
}

.header-trang h1 { margin: 0; }

/* Cho bảng cuộn ngang thay vì phá layout trên màn hình hẹp */
.bang-cuon-ngang {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.bang-cuon-ngang .bang-ky-quay { min-width: 560px; }

@media (max-width: 600px) {
    body { font-size: 15px; }
    .container { padding: 0 14px; }

    .header-inner { flex-direction: column; gap: 10px; padding: 14px; }
    .main-nav {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        row-gap: 8px;
    }
    .main-nav a, .nav-nguoi-dung { margin: 0 10px; font-size: 14px; }

    .hero, .form-mua-ve, .chi-tiet-ky, .banner-thanh-cong { padding: 20px 16px; }
    .hero-grid { grid-template-columns: 1fr; }

    .vien-so { width: 38px; height: 38px; font-size: 15px; }

    .luoi-chon-so { grid-template-columns: repeat(6, 1fr); gap: 6px; }
    .o-so { padding: 8px 0; font-size: 14px; }

    .danh-sach-ve { grid-template-columns: 1fr; }

    .admin-nav { flex-wrap: wrap; gap: 12px 20px; }

    .btn, .btn-primary { width: 100%; text-align: center; }
    .form-sua-ve .btn, #btn-them-bo-so { width: auto; }

    .dong-bo-so { justify-content: flex-start; }

    .bang-ky-quay th, .bang-ky-quay td { padding: 10px; font-size: 14px; }
}