/* =====================================================
   THIẾT LẬP CHUNG
   ===================================================== */

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    background: #f2f6fb;
    color: #243447;
    line-height: 1.6;
}


/* =====================================================
   CÁC NÚT DÙNG CHUNG
   ===================================================== */

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;

    padding: 10px 15px;

    border: 0;
    border-radius: 8px;

    font-family: inherit;
    font-size: 14px;
    font-weight: bold;
    line-height: 1.2;

    text-decoration: none;
    cursor: pointer;

    transition:
        transform 0.15s ease,
        opacity 0.15s ease;
}

.button:hover {
    transform: translateY(-1px);
    opacity: 0.92;
}

.button-full {
    width: 100%;
}

.button-primary {
    background: #1976d2;
    color: white;
}

.button-secondary {
    background: #e8edf2;
    color: #263238;
}

.button-light {
    background: white;
    color: #0d47a1;
}

.button-edit {
    background: #e3f2fd;
    color: #0d47a1;
}

.button-lock {
    background: #ffebee;
    color: #b71c1c;
}

.button-unlock {
    background: #e8f5e9;
    color: #1b5e20;
}

.button-small {
    padding: 7px 10px;
    font-size: 13px;
}


/* =====================================================
   TRANG CHỦ - PHẦN ĐẦU TRANG
   ===================================================== */

.header {
    padding: 30px 20px;

    background: linear-gradient(
        135deg,
        #1976d2,
        #0d47a1
    );

    color: white;
}

.header-content {
    width: min(1100px, 94%);
    margin: 0 auto;

    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;

    text-align: left;
}

.logo {
    width: 72px;
    height: 72px;
    flex-shrink: 0;

    display: flex;
    align-items: center;
    justify-content: center;

    background: white;
    color: #1565c0;

    border-radius: 18px;

    font-size: 26px;
    font-weight: bold;
}

.header h1 {
    max-width: 850px;
    margin: 0 0 8px;

    font-size: 30px;
    line-height: 1.25;
}

.header p {
    margin: 0;
    font-size: 17px;
    opacity: 0.95;
}


/* =====================================================
   TRANG CHỦ - NỘI DUNG CHÍNH
   ===================================================== */

.container {
    width: min(1100px, 94%);
    margin: 35px auto;
}


/* Khung giới thiệu */

.welcome {
    margin-bottom: 26px;
    padding: 30px;

    background: white;
    border-radius: 16px;

    box-shadow:
        0 5px 18px rgba(30, 60, 90, 0.08);

    text-align: center;
}

.section-label {
    margin: 0 0 8px;

    color: #1976d2;

    font-size: 13px;
    font-weight: bold;
    letter-spacing: 1.2px;
}

.welcome h2 {
    margin: 0 0 12px;
    font-size: 27px;
}

.welcome p:last-child {
    margin: 0;
    color: #536579;
}


/* Các thẻ phân quyền */

.roles {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.role-card {
    min-height: 285px;
    padding: 28px 20px;

    display: flex;
    flex-direction: column;
    align-items: center;

    background: white;

    border: 1px solid #e4ebf3;
    border-radius: 16px;

    box-shadow:
        0 5px 18px rgba(30, 60, 90, 0.08);

    text-align: center;

    transition:
        transform 0.2s ease,
        box-shadow 0.2s ease;
}

.role-card:hover {
    transform: translateY(-5px);

    box-shadow:
        0 10px 25px rgba(30, 60, 90, 0.14);
}

.role-icon {
    width: 72px;
    height: 72px;
    margin-bottom: 16px;

    display: flex;
    align-items: center;
    justify-content: center;

    background: #eef6ff;
    border-radius: 50%;

    font-size: 38px;
}

.role-card h3 {
    margin: 0 0 10px;
    font-size: 21px;
}

.role-card p {
    flex-grow: 1;
    margin: 0 0 18px;
    color: #536579;
}

.role-badge {
    display: inline-block;

    padding: 6px 13px;

    background: #e3f2fd;
    color: #0d47a1;

    border-radius: 20px;

    font-size: 13px;
    font-weight: bold;
}


/* Trạng thái máy chủ */

.status {
    margin-top: 28px;
    padding: 18px 22px;

    display: flex;
    align-items: center;
    justify-content: center;
    gap: 14px;

    background: #e8f5e9;

    border: 1px solid #c8e6c9;
    border-radius: 14px;

    color: #1b5e20;
}

.status-icon {
    width: 42px;
    height: 42px;
    flex-shrink: 0;

    display: flex;
    align-items: center;
    justify-content: center;

    background: #2e7d32;
    color: white;

    border-radius: 50%;

    font-size: 22px;
    font-weight: bold;
}

.status strong {
    display: block;
}

.status p {
    margin: 2px 0 0;
    font-size: 14px;
}


/* Chân trang */

.footer {
    padding: 22px 15px;

    background: #263238;
    color: #dce4e8;

    text-align: center;
}

.footer p {
    margin: 3px 0;
}

.footer p:last-child {
    font-size: 13px;
    opacity: 0.8;
}


/* =====================================================
   TRANG QUẢN LÝ DỮ LIỆU - PHẦN ĐẦU
   ===================================================== */

.admin-header {
    padding: 28px 20px;

    background: linear-gradient(
        135deg,
        #0d47a1,
        #1976d2
    );

    color: white;
}

.admin-header-inner {
    width: min(1250px, 94%);
    margin: 0 auto;

    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 25px;
}

.admin-eyebrow {
    margin: 0 0 5px;

    font-size: 12px;
    font-weight: bold;
    letter-spacing: 1.3px;

    opacity: 0.85;
}

.admin-header h1 {
    margin: 0 0 5px;
    font-size: 29px;
}

.admin-header p:last-child {
    margin: 0;
}


/* =====================================================
   TRANG QUẢN LÝ DỮ LIỆU - BỐ CỤC
   ===================================================== */

.admin-container {
    width: min(1250px, 94%);
    margin: 30px auto;
}

.admin-grid {
    display: grid;
    grid-template-columns: 340px minmax(0, 1fr);
    gap: 24px;
    align-items: start;
}

.panel {
    padding: 25px;

    background: white;

    border: 1px solid #e0e8f0;
    border-radius: 16px;

    box-shadow:
        0 5px 18px rgba(30, 60, 90, 0.08);
}

.panel-wide {
    min-width: 0;
}

.panel-header {
    margin-bottom: 22px;

    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 15px;
}

.panel-header h2 {
    margin: 0;
    font-size: 23px;
}

.panel-label {
    margin: 0 0 3px;

    color: #1976d2;

    font-size: 12px;
    font-weight: bold;
    letter-spacing: 1px;
}


/* =====================================================
   BIỂU MẪU NHẬP DỮ LIỆU
   ===================================================== */

.data-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 7px;
}

.form-group label {
    font-weight: bold;
}

.form-group input {
    width: 100%;
    padding: 12px 13px;

    border: 1px solid #c8d3df;
    border-radius: 9px;

    font-family: inherit;
    font-size: 16px;

    outline: none;
}

.form-group input:focus {
    border-color: #1976d2;

    box-shadow:
        0 0 0 3px rgba(25, 118, 210, 0.12);
}

.form-group small {
    color: #657789;
    font-size: 13px;
}

.form-actions {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}


/* =====================================================
   THÔNG BÁO
   ===================================================== */

.alert {
    margin-bottom: 20px;
    padding: 14px 17px;

    border-radius: 10px;

    font-weight: bold;
}

.alert-success {
    background: #e8f5e9;

    border: 1px solid #a5d6a7;

    color: #1b5e20;
}

.alert-error {
    background: #ffebee;

    border: 1px solid #ef9a9a;

    color: #b71c1c;
}


/* =====================================================
   BẢNG DANH SÁCH DỮ LIỆU
   ===================================================== */

.count-badge {
    padding: 7px 12px;

    background: #edf5ff;
    color: #0d47a1;

    border-radius: 20px;

    font-size: 13px;
    font-weight: bold;
}

.table-wrapper {
    width: 100%;
    overflow-x: auto;
}

.data-table {
    width: 100%;
    min-width: 760px;

    border-collapse: collapse;
}

.data-table th,
.data-table td {
    padding: 13px 11px;

    border-bottom: 1px solid #e4eaf0;

    text-align: left;
    vertical-align: middle;
}

.data-table th {
    background: #f4f7fa;
    color: #415466;

    font-size: 13px;
}

.data-table tbody tr:hover {
    background: #f8fbff;
}

.row-inactive {
    background: #fafafa;
    color: #7a8792;
}


/* Trạng thái hoạt động */

.status-badge {
    display: inline-block;

    padding: 5px 9px;

    border-radius: 20px;

    font-size: 12px;
    font-weight: bold;

    white-space: nowrap;
}

.status-active {
    background: #e8f5e9;
    color: #1b5e20;
}

.status-locked {
    background: #ffebee;
    color: #b71c1c;
}


/* Nhóm nút thao tác */

.action-group {
    display: flex;
    align-items: center;
    gap: 7px;
}

.action-group form {
    margin: 0;
}


/* Trạng thái chưa có dữ liệu */

.empty-state {
    padding: 45px 20px;

    text-align: center;

    color: #657789;
}

.empty-icon {
    font-size: 48px;
}

.empty-state h3 {
    margin: 8px 0;
    color: #243447;
}

.empty-state p {
    margin: 0;
}


/* =====================================================
   TRANG SỬA THÔNG TIN
   ===================================================== */

.form-page {
    width: min(650px, 92%);
    margin: 35px auto;
}

.edit-panel {
    padding: 30px;
}


/* =====================================================
   HIỂN THỊ TRÊN MÁY TÍNH BẢNG
   ===================================================== */

@media (max-width: 950px) {
    .admin-grid {
        grid-template-columns: 1fr;
    }

    .admin-header-inner {
        align-items: flex-start;
    }
}

@media (max-width: 900px) {
    .roles {
        grid-template-columns: repeat(2, 1fr);
    }
}


/* =====================================================
   HIỂN THỊ TRÊN ĐIỆN THOẠI
   ===================================================== */

@media (max-width: 600px) {
    .header-content {
        flex-direction: column;
        text-align: center;
    }

    .header h1 {
        font-size: 24px;
    }

    .roles {
        grid-template-columns: 1fr;
    }

    .role-card {
        min-height: auto;
    }

    .status {
        align-items: flex-start;
        justify-content: flex-start;
    }

    .admin-header-inner {
        flex-direction: column;
    }

    .admin-header h1 {
        font-size: 24px;
    }

    .panel {
        padding: 19px;
    }

    .panel-header {
        align-items: flex-start;
    }

    .form-actions {
        flex-direction: column-reverse;
    }

    .form-actions .button {
        width: 100%;
    }
}