/* =====================================================
   Admin Dashboard - Clean Monochrome Design
   ===================================================== */

/* Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Pretendard:wght@400;500;600;700&display=swap');

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

:root {
    /* Monochrome Palette */
    --gray-50: #fafafa;
    --gray-100: #f5f5f5;
    --gray-200: #e5e5e5;
    --gray-300: #d4d4d4;
    --gray-400: #a3a3a3;
    --gray-500: #737373;
    --gray-600: #525252;
    --gray-700: #404040;
    --gray-800: #262626;
    --gray-900: #171717;
    --black: #0a0a0a;
    --white: #ffffff;

    /* Semantic Colors */
    --primary: var(--gray-900);
    --primary-hover: var(--black);
    --secondary: var(--gray-500);
    --success: #22c55e;
    --warning: #eab308;
    --danger: #ef4444;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.04);

    /* Border Radius */
    --radius-sm: 6px;
    --radius: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;

    /* Transitions */
    --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
    background: var(--gray-100);
    color: var(--gray-900);
    line-height: 1.6;
    font-size: 14px;
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--gray-700);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--black);
}

/* =====================================================
   Login Page
   ===================================================== */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gray-900);
    position: relative;
    overflow: hidden;
}

.login-page::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background:
        radial-gradient(circle at 20% 80%, rgba(255,255,255,0.03) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255,255,255,0.03) 0%, transparent 50%);
    animation: subtle-move 20s ease-in-out infinite;
}

@keyframes subtle-move {
    0%, 100% { transform: translate(0, 0); }
    50% { transform: translate(-2%, -2%); }
}

.login-container {
    width: 100%;
    max-width: 400px;
    padding: 24px;
    position: relative;
    z-index: 1;
}

.login-box {
    background: var(--white);
    padding: 48px 40px;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
}

.login-title {
    font-size: 1.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 8px;
    color: var(--gray-900);
    letter-spacing: -0.02em;
}

.login-subtitle {
    text-align: center;
    color: var(--gray-500);
    margin-bottom: 36px;
    font-size: 0.9rem;
}

/* =====================================================
   Forms
   ===================================================== */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    font-size: 0.875rem;
    color: var(--gray-700);
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    font-size: 0.9375rem;
    font-family: inherit;
    background: var(--white);
    color: var(--gray-900);
    transition: var(--transition);
}

.form-group input:hover,
.form-group textarea:hover,
.form-group select:hover {
    border-color: var(--gray-300);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--gray-900);
    box-shadow: 0 0 0 3px rgba(0, 0, 0, 0.05);
}

.form-group input::placeholder {
    color: var(--gray-400);
}

.form-hint {
    font-size: 0.8125rem;
    color: var(--gray-500);
    margin-top: 6px;
}

/* =====================================================
   Buttons
   ===================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius);
    font-size: 0.875rem;
    font-weight: 500;
    font-family: inherit;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

.btn:hover {
    text-decoration: none;
    transform: translateY(-1px);
}

.btn:active {
    transform: translateY(0);
}

.btn-primary {
    background: var(--gray-900);
    color: var(--white);
}

.btn-primary:hover {
    background: var(--black);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: var(--white);
    color: var(--gray-700);
    border: 1px solid var(--gray-200);
}

.btn-secondary:hover {
    background: var(--gray-50);
    border-color: var(--gray-300);
}

.btn-danger {
    background: var(--danger);
    color: var(--white);
}

.btn-danger:hover {
    background: #dc2626;
}

.btn-success {
    background: var(--success);
    color: var(--white);
}

.btn-success:hover {
    background: #16a34a;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 0.8125rem;
}

.btn-lg {
    padding: 14px 28px;
    font-size: 1rem;
}

.btn-full {
    width: 100%;
}

.btn-group {
    display: flex;
    gap: 8px;
}

/* =====================================================
   Alerts
   ===================================================== */
.alert {
    padding: 14px 18px;
    border-radius: var(--radius);
    margin-bottom: 20px;
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.alert-error {
    background: #fef2f2;
    color: #b91c1c;
    border: 1px solid #fecaca;
}

.alert-success {
    background: #f0fdf4;
    color: #15803d;
    border: 1px solid #bbf7d0;
}

.alert-warning {
    background: #fefce8;
    color: #a16207;
    border: 1px solid #fde047;
}

/* =====================================================
   Admin Layout
   ===================================================== */
.admin-wrapper {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: 260px;
    background: var(--white);
    border-right: 1px solid var(--gray-200);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 100;
}

.sidebar-header {
    padding: 24px;
    border-bottom: 1px solid var(--gray-100);
}

.sidebar-header h2 {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--gray-900);
    letter-spacing: -0.02em;
}

.sidebar-nav {
    flex: 1;
    padding: 16px 12px;
}

.nav-item {
    display: flex;
    align-items: center;
    padding: 12px 16px;
    color: var(--gray-600);
    border-radius: var(--radius);
    margin-bottom: 4px;
    font-weight: 500;
    transition: var(--transition);
}

.nav-item:hover {
    background: var(--gray-100);
    color: var(--gray-900);
}

.nav-item.active {
    background: var(--gray-900);
    color: var(--white);
}

.nav-icon {
    margin-right: 12px;
    font-size: 1rem;
    opacity: 0.7;
}

.nav-item.active .nav-icon {
    opacity: 1;
}

.badge {
    margin-left: auto;
    background: var(--danger);
    color: var(--white);
    font-size: 0.6875rem;
    font-weight: 600;
    padding: 3px 8px;
    border-radius: 10px;
    min-width: 20px;
    text-align: center;
}

.sidebar-footer {
    padding: 16px 12px;
    border-top: 1px solid var(--gray-100);
}

.logout {
    color: var(--gray-400);
}

.logout:hover {
    color: var(--gray-600);
    background: var(--gray-50);
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: 260px;
    background: var(--gray-50);
    min-height: 100vh;
}

.content-header {
    background: var(--white);
    padding: 20px 32px;
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 50;
}

.content-header h1 {
    font-size: 1.375rem;
    font-weight: 700;
    color: var(--gray-900);
    letter-spacing: -0.02em;
}

.content-body {
    padding: 32px;
}

/* =====================================================
   Stats Grid
   ===================================================== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 20px;
    margin-bottom: 32px;
}

.stat-card {
    background: var(--white);
    padding: 24px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-200);
    transition: var(--transition);
}

.stat-card:hover {
    border-color: var(--gray-300);
    box-shadow: var(--shadow-md);
}

.stat-card.highlight {
    background: var(--gray-900);
    color: var(--white);
    border-color: var(--gray-900);
}

.stat-number {
    font-size: 2.25rem;
    font-weight: 700;
    line-height: 1;
    margin-bottom: 8px;
    letter-spacing: -0.03em;
}

.stat-label {
    font-size: 0.8125rem;
    color: var(--gray-500);
    font-weight: 500;
}

.stat-card.highlight .stat-label {
    color: var(--gray-400);
}

/* =====================================================
   Cards
   ===================================================== */
.card {
    background: var(--white);
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-200);
    margin-bottom: 24px;
    overflow: hidden;
}

.card-header {
    padding: 18px 24px;
    border-bottom: 1px solid var(--gray-100);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-header h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--gray-900);
}

.card-body {
    padding: 24px;
}

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

.table th,
.table td {
    padding: 14px 16px;
    text-align: left;
    border-bottom: 1px solid var(--gray-100);
}

.table th {
    font-weight: 600;
    color: var(--gray-500);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    background: var(--gray-50);
}

.table tbody tr {
    transition: var(--transition);
}

.table tbody tr:hover {
    background: var(--gray-50);
}

.table tbody tr.unread {
    background: #fefce8;
}

.table tbody tr.unread:hover {
    background: #fef9c3;
}

.empty-message {
    text-align: center;
    color: var(--gray-400);
    padding: 60px 20px;
    font-size: 0.9375rem;
}

/* =====================================================
   Status Badges
   ===================================================== */
.status-badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 500;
}

.status-badge.read {
    background: var(--gray-100);
    color: var(--gray-600);
}

.status-badge.unread {
    background: var(--gray-900);
    color: var(--white);
}

.status-badge.active {
    background: #dcfce7;
    color: #15803d;
}

.status-badge.inactive {
    background: var(--gray-100);
    color: var(--gray-500);
}

/* =====================================================
   Page Grid
   ===================================================== */
.page-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 24px;
}

.page-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-200);
    overflow: hidden;
    transition: var(--transition);
}

.page-card:hover {
    border-color: var(--gray-300);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.page-card-image {
    width: 100%;
    height: 180px;
    object-fit: cover;
    background: var(--gray-100);
    border-bottom: 1px solid var(--gray-100);
}

.page-card-body {
    padding: 20px;
}

.page-card-path {
    font-family: 'SF Mono', 'Consolas', monospace;
    background: var(--gray-100);
    padding: 6px 10px;
    border-radius: var(--radius-sm);
    font-size: 0.8125rem;
    color: var(--gray-700);
    display: inline-block;
    margin-bottom: 12px;
}

.page-card-meta {
    font-size: 0.8125rem;
    color: var(--gray-500);
    margin-bottom: 16px;
}

.page-card-actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

/* =====================================================
   Inquiry Detail
   ===================================================== */
.inquiry-detail {
    max-width: 600px;
}

.inquiry-info {
    display: grid;
    gap: 16px;
}

.inquiry-info-item {
    display: flex;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--gray-100);
}

.inquiry-info-label {
    width: 140px;
    font-weight: 500;
    color: var(--gray-500);
    font-size: 0.875rem;
}

.inquiry-info-value {
    flex: 1;
    color: var(--gray-900);
}

/* =====================================================
   Modal
   ===================================================== */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    padding: 24px;
}

.modal-overlay.active {
    display: flex;
}

.modal {
    background: var(--white);
    border-radius: var(--radius-lg);
    max-width: 500px;
    width: 100%;
    max-height: 85vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
}

.modal-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--gray-100);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-header h3 {
    font-size: 1.125rem;
    font-weight: 600;
}

.modal-body {
    padding: 24px;
}

.modal-footer {
    padding: 20px 24px;
    border-top: 1px solid var(--gray-100);
    display: flex;
    justify-content: flex-end;
    gap: 12px;
}

.modal-close {
    background: none;
    border: none;
    width: 32px;
    height: 32px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    cursor: pointer;
    color: var(--gray-400);
    transition: var(--transition);
}

.modal-close:hover {
    background: var(--gray-100);
    color: var(--gray-600);
}

/* =====================================================
   Checkbox
   ===================================================== */
.checkbox-group {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.checkbox-item {
    display: flex;
    align-items: center;
    gap: 10px;
}

.checkbox-item input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--gray-900);
}

/* =====================================================
   Responsive
   ===================================================== */
@media (max-width: 1024px) {
    .sidebar {
        width: 220px;
    }
    .main-content {
        margin-left: 220px;
    }
}

@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        width: 100%;
        height: auto;
        bottom: 0;
        top: auto;
        border-right: none;
        border-top: 1px solid var(--gray-200);
        flex-direction: row;
        padding: 0;
    }

    .sidebar-header,
    .sidebar-footer {
        display: none;
    }

    .sidebar-nav {
        display: flex;
        flex-direction: row;
        justify-content: space-around;
        padding: 8px;
        width: 100%;
    }

    .nav-item {
        flex-direction: column;
        padding: 8px 12px;
        font-size: 0.75rem;
        margin-bottom: 0;
    }

    .nav-icon {
        margin-right: 0;
        margin-bottom: 4px;
    }

    .badge {
        position: absolute;
        top: -4px;
        right: -4px;
    }

    .main-content {
        margin-left: 0;
        margin-bottom: 70px;
    }

    .content-body {
        padding: 20px;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }

    .stat-card {
        padding: 16px;
    }

    .stat-number {
        font-size: 1.75rem;
    }

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

    .table {
        font-size: 0.8125rem;
    }

    .table th,
    .table td {
        padding: 10px 12px;
    }
}