/**
 * ====================================================================
 * ADMIN.CSS - Giao Diện Bảng Quản Trị Hệ Thống TempMail MVC
 * Thiết kế chuyên nghiệp, hiện đại, chuẩn UI Dashboard cao cấp
 * ====================================================================
 */

:root {
    --admin-bg: #0b1120;
    --admin-sidebar-bg: #0f172a;
    --admin-card-bg: #1e293b;
    --admin-border: #334155;
    --admin-input-bg: #0f172a;
    --admin-text-main: #f8fafc;
    --admin-text-muted: #94a3b8;
    --admin-text-sub: #64748b;
    --admin-primary: #2563eb;
    --admin-primary-hover: #1d4ed8;
    --admin-danger: #dc2626;
    --admin-danger-hover: #b91c1c;
    --admin-success: #10b981;
}

*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body.admin-body {
    background-color: var(--admin-bg);
    color: var(--admin-text-main);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    line-height: 1.5;
}

.admin-layout {
    display: flex;
    min-height: 100vh;
}

/* ================= ADMIN SIDEBAR ================= */
.admin-sidebar {
    width: 250px;
    background: var(--admin-sidebar-bg);
    border-right: 1px solid var(--admin-border);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    transition: transform 0.3s ease;
}

.sidebar-header {
    height: 60px;
    display: flex;
    align-items: center;
    padding: 0 20px;
    border-bottom: 1px solid var(--admin-border);
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: #fff;
    font-size: 16px;
    font-weight: 700;
}

.sidebar-brand-icon {
    width: 30px;
    height: 30px;
    background: var(--admin-primary);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
}

.sidebar-menu {
    padding: 16px 10px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    flex: 1;
}

.menu-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 9px 12px;
    color: var(--admin-text-muted);
    text-decoration: none;
    border-radius: 6px;
    font-size: 13.5px;
    font-weight: 500;
    transition: all 0.15s;
}

.menu-item svg {
    width: 17px;
    height: 17px;
    flex-shrink: 0;
}

.menu-item:hover {
    background: rgba(255, 255, 255, 0.05);
    color: #fff;
}

.menu-item.active {
    background: var(--admin-primary);
    color: #fff;
    font-weight: 600;
}

.menu-logout {
    color: #f87171;
}

.menu-logout:hover {
    background: rgba(239, 68, 68, 0.12);
    color: #fca5a5;
}

.sidebar-divider {
    border: none;
    border-top: 1px solid var(--admin-border);
    margin: 10px 0;
}

/* ================= ADMIN MAIN ================= */
.admin-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.admin-topbar {
    height: 60px;
    background: var(--admin-sidebar-bg);
    border-bottom: 1px solid var(--admin-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
}

.btn-toggle-sidebar {
    display: none;
    background: transparent;
    border: none;
    color: #fff;
    font-size: 20px;
    cursor: pointer;
}

.topbar-user {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 13.5px;
    color: var(--admin-text-muted);
}

.btn-logout-top {
    color: #f87171;
    text-decoration: none;
    font-size: 12.5px;
    border: 1px solid rgba(239, 68, 68, 0.3);
    padding: 3px 10px;
    border-radius: 4px;
    transition: 0.15s;
}

.btn-logout-top:hover {
    background: var(--admin-danger);
    color: #fff;
}

.admin-content-wrapper {
    flex: 1;
    padding: 24px;
}

.admin-page-header {
    margin-bottom: 22px;
}

.page-title {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 4px;
    color: #fff;
}

.page-subtitle {
    font-size: 13px;
    color: var(--admin-text-muted);
}

/* ================= STATS CARDS ================= */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
    margin-bottom: 22px;
}

.stat-card {
    background: var(--admin-card-bg);
    border: 1px solid var(--admin-border);
    border-radius: 10px;
    padding: 18px;
    display: flex;
    align-items: center;
    gap: 14px;
}

.stat-icon {
    width: 44px;
    height: 44px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.stat-icon svg {
    width: 22px;
    height: 22px;
}

.stat-blue   { background: rgba(37, 99, 235, 0.15); color: #60a5fa; }
.stat-green  { background: rgba(16, 185, 129, 0.15); color: #34d399; }
.stat-purple { background: rgba(168, 85, 247, 0.15); color: #c084fc; }

.stat-data {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-size: 22px;
    font-weight: 700;
    color: #fff;
}

.stat-title {
    font-size: 12.5px;
    color: var(--admin-text-muted);
}

/* ================= GRID & CARDS ================= */
.admin-grid-2 {
    display: grid;
    grid-template-columns: 1fr 1.4fr;
    gap: 20px;
}

.admin-card {
    background: var(--admin-card-bg);
    border: 1px solid var(--admin-border);
    border-radius: 10px;
    overflow: hidden;
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 18px;
    border-bottom: 1px solid var(--admin-border);
    background: rgba(11, 17, 32, 0.4);
}

.card-header h3 {
    font-size: 14.5px;
    font-weight: 600;
    color: #fff;
}

/* ================= FORMS & INPUTS (CĂN CHỈNH ĐẸP) ================= */
.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--admin-text-muted);
    margin-bottom: 6px;
}

.form-control {
    width: 100%;
    height: 42px;
    background: var(--admin-input-bg);
    border: 1px solid var(--admin-border);
    border-radius: 6px;
    padding: 0 14px;
    font-size: 13.5px;
    color: #fff;
    outline: none;
    font-family: inherit;
    transition: border-color 0.15s, box-shadow 0.15s;
}

.form-control:focus {
    border-color: var(--admin-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.2);
}

.form-control::placeholder {
    color: var(--admin-text-sub);
}

/* ================= BUTTONS ================= */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    height: 40px;
    padding: 0 16px;
    font-size: 13px;
    font-weight: 600;
    border-radius: 6px;
    border: none;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.15s ease;
    white-space: nowrap;
}

.btn-primary {
    background: var(--admin-primary);
    color: #fff;
}
.btn-primary:hover {
    background: var(--admin-primary-hover);
}

.btn-danger {
    background: var(--admin-danger);
    color: #fff;
}
.btn-danger:hover {
    background: var(--admin-danger-hover);
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--admin-border);
    color: var(--admin-text-muted);
}
.btn-outline:hover {
    background: rgba(255, 255, 255, 0.05);
    color: #fff;
    border-color: #475569;
}

.btn-sm {
    height: 30px;
    padding: 0 10px;
    font-size: 12px;
    border-radius: 4px;
}

.btn-block {
    width: 100%;
}

/* ================= TABLES ================= */
.table-responsive {
    overflow-x: auto;
    width: 100%;
}

.admin-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
    text-align: left;
}

.admin-table th {
    background: rgba(11, 17, 32, 0.6);
    color: var(--admin-text-muted);
    padding: 10px 16px;
    font-weight: 600;
    border-bottom: 1px solid var(--admin-border);
}

.admin-table td {
    padding: 11px 16px;
    border-bottom: 1px solid rgba(51, 65, 85, 0.35);
    color: #cbd5e1;
    vertical-align: middle;
}

.admin-table tr:hover {
    background: rgba(255, 255, 255, 0.02);
}

/* ================= BADGES ================= */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 3px 8px;
    border-radius: 4px;
    font-size: 11.5px;
    font-weight: 600;
}

.badge-success {
    background: rgba(16, 185, 129, 0.15);
    color: #34d399;
    border: 1px solid rgba(16, 185, 129, 0.25);
}

.badge-secondary {
    background: rgba(148, 163, 184, 0.15);
    color: #94a3b8;
    border: 1px solid rgba(148, 163, 184, 0.25);
}

.badge-info {
    background: rgba(37, 99, 235, 0.15);
    color: #60a5fa;
    border: 1px solid rgba(37, 99, 235, 0.25);
}

/* ================= FLASH ALERTS ================= */
.flash-alert {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 14px;
    border-radius: 6px;
    margin-bottom: 18px;
    font-size: 13.5px;
}
.flash-success { background: rgba(16, 185, 129, 0.15); border: 1px solid rgba(16, 185, 129, 0.3); color: #6ee7b7; }
.flash-error   { background: rgba(220, 38, 38, 0.15); border: 1px solid rgba(220, 38, 38, 0.3); color: #fca5a5; }
.flash-info    { background: rgba(37, 99, 235, 0.15); border: 1px solid rgba(37, 99, 235, 0.3); color: #93c5fd; }
.close-flash   { background: transparent; border: none; color: inherit; cursor: pointer; font-size: 15px; }

/* ================= ADMIN LOGIN PAGE (ĐẸP, KHÔNG EMOJI) ================= */
body.admin-login-body {
    background-color: var(--admin-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 16px;
}

.login-wrapper {
    width: 100%;
    max-width: 400px;
}

.login-box {
    background: var(--admin-card-bg);
    border: 1px solid var(--admin-border);
    border-radius: 12px;
    padding: 30px 24px;
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.4);
}

.login-header {
    text-align: center;
    margin-bottom: 22px;
}

.login-icon-box {
    width: 50px;
    height: 50px;
    background: rgba(37, 99, 235, 0.12);
    border: 1px solid rgba(37, 99, 235, 0.3);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 12px auto;
    color: #60a5fa;
}

.login-icon-box svg {
    width: 24px;
    height: 24px;
}

.login-header h1 {
    font-size: 20px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 4px;
}

.login-header p {
    font-size: 13px;
    color: var(--admin-text-muted);
}

.login-hint {
    margin-top: 18px;
    text-align: center;
    font-size: 12px;
    color: var(--admin-text-muted);
}

.login-hint code {
    color: #38bdf8;
    background: #0f172a;
    padding: 2px 6px;
    border-radius: 4px;
}

.back-link {
    display: inline-block;
    margin-top: 10px;
    color: var(--admin-primary);
    text-decoration: none;
    font-size: 12.5px;
}
.back-link:hover {
    text-decoration: underline;
}

/* ================= PAGINATION ================= */
.pagination {
    display: flex;
    gap: 6px;
    padding: 14px 18px;
    justify-content: center;
}

.page-num {
    padding: 5px 11px;
    background: #0f172a;
    border: 1px solid var(--admin-border);
    color: var(--admin-text-muted);
    border-radius: 4px;
    text-decoration: none;
    font-size: 12.5px;
}

.page-num.active {
    background: var(--admin-primary);
    color: #fff;
    border-color: var(--admin-primary);
}

.admin-footer {
    padding: 16px 24px;
    border-top: 1px solid var(--admin-border);
    color: var(--admin-text-muted);
    font-size: 12px;
    text-align: center;
}

@media (max-width: 860px) {
    .admin-grid-2 {
        grid-template-columns: 1fr;
    }
    .btn-toggle-sidebar {
        display: block;
    }
    .admin-sidebar {
        position: fixed;
        left: -250px;
        top: 0;
        bottom: 0;
        z-index: 1000;
        box-shadow: 2px 0 12px rgba(0,0,0,0.5);
    }
    .admin-sidebar.active {
        transform: translateX(250px);
    }
}