/* ============================================================================
   Admin Layout & Dashboard Styles
   - Integrates with MudBlazor without overriding Mud components
   - Focuses on custom admin-* and accent-* classes only
   ============================================================================ */

/* Global Reset */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    font-family: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: #f5f5f5;
    color: #333;
}

/* Utility Classes */
.d-flex {
    display: flex;
}

.align-center {
    align-items: center;
}

.justify-center {
    justify-content: center;
}

.justify-space-between {
    justify-content: space-between;
}

.pa-8 {
    padding: 32px !important;
}

.mb-4 {
    margin-bottom: 16px !important;
}

.mb-6 {
    margin-bottom: 24px !important;
}

.mt-4 {
    margin-top: 16px !important;
}

.text-center {
    text-align: center;
}

.ml-3 {
    margin-left: 12px !important;
}

.cursor-pointer {
    cursor: pointer;
}

.font-weight-bold {
    font-weight: 600 !important;
}

/* ============================================================================
   Login Page Styles
   ============================================================================ */

.admin-login-page.mud-container {
    width: 100%;
    margin: 0 auto;
}

.admin-login-page.mud-container-maxwidth-small {
    max-width: 600px !important;
}

.admin-login-page .mud-paper {
    background-color: white;
    border-radius: 4px;
    box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.12);
    padding: 16px;
}

.admin-login-page .mud-paper.elevation-3 {
    box-shadow: 0 3px 6px 0 rgba(0, 0, 0, 0.16);
}

.admin-login-page .mud-typography {
    color: #333;
    line-height: 1.5;
}

.admin-login-page .mud-typography--h4 {
    font-size: 2.125rem;
    font-weight: 500;
    color: #1976d2;
}

.admin-login-page .mud-typography--body1 {
    font-size: 1rem;
}

.admin-login-page input[type="text"],
.admin-login-page input[type="password"] {
    width: 100%;
    padding: 12px;
    margin-bottom: 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-family: inherit;
    font-size: 1rem;
    transition: border-color 0.3s;
}

.admin-login-page input[type="text"]:focus,
.admin-login-page input[type="password"]:focus {
    outline: none;
    border-color: #1976d2;
    box-shadow: 0 0 0 3px rgba(25, 118, 210, 0.1);
}

.admin-login-page label {
    display: block;
    margin-bottom: 6px;
    font-weight: 500;
    color: #555;
    font-size: 0.875rem;
}

.admin-login-page button {
    width: 100%;
    padding: 12px 24px;
    margin-top: 12px;
    background-color: #1976d2;
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.3s;
}

.admin-login-page button:hover {
    background-color: #1565c0;
}

.admin-login-page button:disabled {
    background-color: #bdbdbd;
    cursor: not-allowed;
}

.admin-login-page .mud-alert {
    padding: 12px 16px;
    margin-bottom: 16px;
    border-radius: 4px;
    background-color: #ffebee;
    border-left: 4px solid #c62828;
    color: #c62828;
}

.admin-login-page .mud-alert--error {
    background-color: #ffebee;
    color: #c62828;
}

.admin-login-page .mud-alert--success {
    background-color: #e8f5e9;
    color: #2e7d32;
}

.admin-login-page .mud-alert--info {
    background-color: #e3f2fd;
    color: #1565c0;
}

.admin-login-page .mud-progress-circular {
    display: inline-block;
}

.loading {
    opacity: 0.6;
}

/* Reconnect Modal */
.admin-reconnect-modal {
    display: none;
}

.admin-reconnect-modal.components-reconnect-show,
.admin-reconnect-modal.components-reconnect-failed,
.admin-reconnect-modal.components-reconnect-rejected {
    position: fixed;
    inset: 0;
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    background: rgba(15, 23, 42, 0.48);
}

.admin-reconnect-card {
    width: min(420px, 100%);
    padding: 24px;
    border-radius: 16px;
    background: #fff;
    box-shadow: 0 24px 80px rgba(15, 23, 42, 0.28);
}

.admin-reconnect-card strong,
.admin-reconnect-card span {
    display: block;
}

.admin-reconnect-card span {
    margin-top: 8px;
    color: #64748b;
}

/* ============================================================================
   Admin Shell (Main Layout)
   ============================================================================ */

.admin-shell {
    display: flex;
    flex-direction: column;
    height: 100vh;
    background-color: #f5f5f5;
}

.admin-topbar {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 12px 24px;
    background-color: #fff;
    border-bottom: 1px solid #e0e0e0;
    z-index: 100;
}

.admin-menu-button {
    margin-right: 8px;
}

.admin-topbar-title {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.admin-topbar-action {
    white-space: nowrap;
}

.admin-drawer {
    width: 280px;
    background-color: #fff;
    border-right: 1px solid #e0e0e0;
}

.admin-drawer-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 20px 16px;
    border-bottom: 1px solid #f0f0f0;
}

.admin-brand-mark {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 8px;
    background: linear-gradient(135deg, #1976d2 0%, #1565c0 100%);
    color: white;
    font-weight: bold;
    font-size: 18px;
}

.admin-nav {
    padding: 16px 0;
}

.admin-nav .mud-nav-link,
.admin-nav .mud-nav-group-header {
    margin: 4px 8px !important;
    border-radius: 8px !important;
}

.admin-nav .mud-nav-link.active {
    background-color: #e3f2fd !important;
}

.admin-drawer-footer {
    padding: 16px;
    border-top: 1px solid #f0f0f0;
    font-size: 0.875rem;
}

.admin-main {
    flex: 1;
    overflow-y: auto;
    background-color: #f5f5f5;
}

.admin-content {
    padding: 32px;
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
}

/* ============================================================================
   Dashboard Page Styles
   ============================================================================ */

/* Page Header */
.admin-page-hero {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 24px;
    margin-bottom: 32px;
    padding-bottom: 24px;
    border-bottom: 1px solid #e0e0e0;
}

.admin-page-hero > div {
    flex: 1;
}

.admin-eyebrow {
    display: block;
    color: #1976d2;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.5px;
    margin-bottom: 4px;
}

.admin-page-title {
    display: block;
    color: #1a1a1a;
    font-weight: 600;
    margin-bottom: 8px;
    font-size: 1.75rem;
}

.admin-page-subtitle {
    display: block;
    color: #666;
    font-size: 0.95rem;
}

/* Metrics Grid - CSS Grid Layout */
.admin-metric-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-bottom: 32px;
    width: 100%;
}

/* Metric Card - Professional Dashboard Style */
.admin-metric-card {
    padding: 24px;
    border-radius: 12px;
    background-color: #fff;
    border: 1px solid #e8e8e8;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-height: 160px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
    position: relative;
    overflow: hidden;
}

.admin-metric-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, currentColor, transparent);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.admin-metric-card:hover {
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.12);
    border-color: #d0d0d0;
    transform: translateY(-4px);
}

.admin-metric-card:hover::before {
    opacity: 1;
}

/* Metric Card Accent Colors */
.accent-blue {
    background: linear-gradient(135deg, #f0f7ff 0%, #e3f2fd 100%);
    border-color: #bbdefb;
    color: #1565c0;
}

.accent-blue:hover {
    background: linear-gradient(135deg, #e3f2fd 0%, #bbdefb 100%);
    border-color: #90caf9;
}

.accent-amber {
    background: linear-gradient(135deg, #fff9f0 0%, #fff3e0 100%);
    border-color: #ffe0b2;
    color: #e65100;
}

.accent-amber:hover {
    background: linear-gradient(135deg, #fff3e0 0%, #ffe0b2 100%);
    border-color: #ffcc80;
}

.accent-slate {
    background: linear-gradient(135deg, #f5f7fa 0%, #eceff1 100%);
    border-color: #cfd8dc;
    color: #455a64;
}

.accent-slate:hover {
    background: linear-gradient(135deg, #eceff1 0%, #cfd8dc 100%);
    border-color: #b0bec5;
}

.accent-green {
    background: linear-gradient(135deg, #f1f9f6 0%, #e8f5e9 100%);
    border-color: #c8e6c9;
    color: #2e7d32;
}

.accent-green:hover {
    background: linear-gradient(135deg, #e8f5e9 0%, #c8e6c9 100%);
    border-color: #81c784;
}

/* Surfaces & Containers */
.admin-surface {
    padding: 24px !important;
    border-radius: 8px !important;
    background-color: #fff !important;
    border: 1px solid #e0e0e0 !important;
    margin-bottom: 24px !important;
}

.admin-section-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 16px;
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid #f0f0f0;
}

.admin-section-header > div:first-child {
    flex: 1;
}

/* Tables */
.admin-table {
    width: 100%;
    border-collapse: collapse;
}

.admin-table thead {
    background-color: #f5f5f5;
    border-bottom: 2px solid #e0e0e0;
}

.admin-table thead th {
    padding: 12px 16px;
    text-align: left;
    font-weight: 600;
    color: #666;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.admin-table tbody tr {
    border-bottom: 1px solid #f0f0f0;
}

.admin-table tbody tr:hover {
    background-color: #fafafa;
}

.admin-table tbody td {
    padding: 12px 16px;
    color: #333;
}

.admin-table tbody a {
    color: #1976d2;
    text-decoration: none;
    font-weight: 600;
}

.admin-table tbody a:hover {
    text-decoration: underline;
}

.admin-table .mud-chip-small {
    height: 24px !important;
    font-size: 0.75rem !important;
}

/* ============================================================================
   Responsive Design
   ============================================================================ */

/* ============================================================================
   Responsive Design - Mobile First Approach
   ============================================================================ */

/* Desktop XXL: 1920px+ - 4 columns, full spacing */
@media (min-width: 1920px) {
    .admin-content {
        padding: 40px;
        max-width: 100%;
    }

    .admin-metric-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: 24px;
    }

    .admin-metric-card {
        min-height: 180px;
        padding: 28px;
    }

    .admin-page-hero {
        gap: 32px;
        margin-bottom: 40px;
        padding-bottom: 32px;
    }
}

/* Desktop XL: 1440px - 4 columns, large spacing */
@media (min-width: 1440px) and (max-width: 1919px) {
    .admin-metric-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: 22px;
    }

    .admin-metric-card {
        min-height: 170px;
        padding: 26px;
    }
}

/* Desktop L: 1024px - 4 columns, medium spacing */
@media (min-width: 1024px) and (max-width: 1439px) {
    .admin-drawer {
        width: 280px;
    }

    .admin-content {
        padding: 28px;
    }

    .admin-metric-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: 18px;
    }

    .admin-metric-card {
        min-height: 160px;
        padding: 22px;
    }

    .admin-page-hero {
        gap: 24px;
    }

    .admin-topbar {
        padding: 12px 20px;
    }
}

/* Tablet L: 960px - 3 columns */
@media (min-width: 960px) and (max-width: 1023px) {
    .admin-drawer {
        width: 260px;
    }

    .admin-content {
        padding: 24px;
    }

    .admin-metric-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 16px;
    }

    .admin-metric-card {
        min-height: 150px;
        padding: 20px;
    }

    .admin-page-title {
        font-size: 1.75rem;
    }

    .admin-surface {
        padding: 22px;
    }
}

/* Tablet M: 768px - 2 columns */
@media (min-width: 768px) and (max-width: 959px) {
    .admin-drawer {
        width: 200px;
    }

    .admin-content {
        padding: 20px;
    }

    .admin-metric-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 14px;
    }

    .admin-metric-card {
        min-height: 140px;
        padding: 18px;
        font-size: 0.95rem;
    }

    .admin-page-title {
        font-size: 1.5rem;
    }

    .admin-page-hero {
        gap: 18px;
        margin-bottom: 24px;
    }

    .admin-surface {
        padding: 18px;
    }

    .admin-table thead th {
        padding: 10px 12px;
        font-size: 0.8rem;
    }

    .admin-table tbody td {
        padding: 10px 12px;
        font-size: 0.9rem;
    }

    .admin-topbar {
        padding: 10px 16px;
    }
}

/* Tablet S: 600px - 1 column, collapse drawer */
@media (min-width: 600px) and (max-width: 767px) {
    .admin-shell {
        flex-direction: row;
    }

    .admin-drawer {
        width: 60px;
        min-height: 100%;
    }

    .admin-main {
        flex: 1;
    }

    .admin-content {
        padding: 18px;
    }

    .admin-metric-grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .admin-metric-card {
        min-height: 130px;
        padding: 16px;
    }

    .admin-page-title {
        font-size: 1.35rem;
    }

    .admin-page-hero {
        flex-direction: column;
        gap: 12px;
        margin-bottom: 20px;
        padding-bottom: 16px;
    }

    .admin-surface {
        padding: 16px;
    }

    .admin-section-header {
        flex-direction: column;
        gap: 12px;
    }

    .admin-topbar {
        padding: 10px 12px;
    }

    .admin-topbar-title {
        display: none;
    }

    .admin-table thead th {
        padding: 8px 10px;
        font-size: 0.75rem;
    }

    .admin-table tbody td {
        padding: 8px 10px;
        font-size: 0.85rem;
    }
}

/* Mobile L: 480px */
@media (min-width: 480px) and (max-width: 599px) {
    .admin-shell {
        flex-direction: column;
    }

    .admin-drawer {
        width: 100%;
        height: auto;
        max-height: 60px;
    }

    .admin-nav {
        display: flex;
        flex-direction: row;
        padding: 8px;
        gap: 4px;
        overflow-x: auto;
    }

    .admin-content {
        padding: 14px;
    }

    .admin-metric-grid {
        grid-template-columns: 1fr;
        gap: 10px;
    }

    .admin-metric-card {
        min-height: 110px;
        padding: 14px;
    }

    .admin-page-title {
        font-size: 1.25rem;
    }

    .admin-page-subtitle {
        font-size: 0.9rem;
    }

    .admin-surface {
        padding: 14px;
    }

    .admin-section-header {
        flex-direction: column;
        gap: 10px;
        margin-bottom: 12px;
        padding-bottom: 10px;
    }

    .admin-table thead th {
        padding: 6px 8px;
        font-size: 0.7rem;
    }

    .admin-table tbody td {
        padding: 6px 8px;
        font-size: 0.8rem;
    }
}

/* Mobile S: <480px */
@media (max-width: 479px) {
    .admin-login-page.mud-container-maxwidth-small {
        max-width: 100% !important;
        padding: 12px;
    }

    .admin-login-page .mud-typography--h4 {
        font-size: 1.3rem;
    }

    .admin-shell {
        flex-direction: column;
        height: auto;
    }

    .admin-topbar {
        padding: 8px;
        gap: 8px;
    }

    .admin-topbar-action {
        padding: 4px 8px !important;
        font-size: 0.75rem;
    }

    .admin-drawer {
        width: 100%;
        height: auto;
    }

    .admin-drawer-brand {
        padding: 12px;
        gap: 8px;
    }

    .admin-brand-mark {
        width: 32px;
        height: 32px;
        font-size: 14px;
    }

    .admin-nav {
        display: flex;
        flex-direction: row;
        padding: 6px;
        gap: 2px;
        overflow-x: auto;
    }

    .admin-main {
        flex: 1;
    }

    .admin-content {
        padding: 12px;
        max-width: 100%;
        margin: 0;
    }

    .admin-page-hero {
        flex-direction: column;
        gap: 10px;
        margin-bottom: 16px;
        padding-bottom: 12px;
    }

    .admin-page-title {
        font-size: 1.1rem;
    }

    .admin-page-subtitle {
        font-size: 0.85rem;
        display: none;
    }

    .admin-eyebrow {
        font-size: 0.65rem;
    }

    .admin-metric-grid {
        grid-template-columns: 1fr;
        gap: 8px;
    }

    .admin-metric-card {
        min-height: 100px;
        padding: 12px;
        border-radius: 8px;
    }

    .admin-surface {
        padding: 12px;
        border-radius: 6px;
    }

    .admin-section-header {
        flex-direction: column;
        gap: 8px;
        margin-bottom: 12px;
        padding-bottom: 8px;
    }

    .admin-section-header h6 {
        font-size: 1rem !important;
    }

    .admin-section-header .mud-button {
        width: 100%;
    }

    .admin-table {
        font-size: 0.75rem;
    }

    .admin-table thead th {
        padding: 4px 6px;
        font-size: 0.65rem;
    }

    .admin-table tbody tr {
        line-height: 1.2;
    }

    .admin-table tbody td {
        padding: 4px 6px;
        font-size: 0.75rem;
    }
}