@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=Noto+Sans+JP:wght@400;500;700&display=swap');
@import url('https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.4.0/css/all.min.css');

:root {
    /* Premium Color Palette */
    --primary-color: #0f2557;
    /* Deep Navy */
    --primary-light: #2851a6;
    /* Brighter Blue for hover */
    --accent-color: #3b82f6;
    /* Action Blue */
    --text-main: #1e293b;
    /* Slate 800 */
    --text-muted: #64748b;
    /* Slate 500 */
    --bg-body: #f1f5f9;
    /* Slate 100 */
    --bg-surface: #ffffff;
    --border-color: #e2e8f0;

    /* Status Colors */
    --status-success-bg: #dcfce7;
    --status-success-text: #166534;
    --status-warning-bg: #fef9c3;
    --status-warning-text: #854d0e;
    --status-danger-bg: #fee2e2;
    --status-danger-text: #991b1b;
    --status-info-bg: #e0f2fe;
    --status-info-text: #075985;

    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);

    /* Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
}

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

body {
    font-family: 'Inter', 'Noto Sans JP', sans-serif;
    color: var(--text-main);
    background-color: var(--bg-body);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    font-size: 14px;
}

/* Layout */
.app-container {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: 260px;
    background-color: var(--primary-color);
    color: white;
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    z-index: 50;
    box-shadow: 4px 0 24px rgba(0, 0, 0, 0.15);
}

.sidebar-header {
    height: 64px;
    padding: 0 var(--spacing-lg);
    font-size: 1.25rem;
    font-weight: 700;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    gap: 12px;
}

.sidebar-header i {
    color: var(--accent-color);
}

.nav-menu {
    flex: 1;
    padding: var(--spacing-md) 0;
    overflow-y: auto;
    /* Custom scrollbar */
    scrollbar-width: thin;
    scrollbar-color: rgba(255, 255, 255, 0.3) rgba(30, 64, 175, 0.5);
}

/* Chrome, Safari, Edge */
.nav-menu::-webkit-scrollbar {
    width: 8px;
}

.nav-menu::-webkit-scrollbar-track {
    background: rgba(30, 64, 175, 0.3);
}

.nav-menu::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.4);
    border-radius: 4px;
    transition: background 0.2s ease;
}

.nav-menu::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.6);
}

.nav-label {
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: 0.75rem;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.4);
    font-weight: 600;
    letter-spacing: 0.05em;
    margin-top: var(--spacing-sm);
}

.nav-item {
    padding: 12px var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: 12px;
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: all 0.2s ease;
    cursor: pointer;
    font-weight: 500;
    border-left: 3px solid transparent;
}

.nav-item:hover {
    background-color: rgba(255, 255, 255, 0.05);
    color: white;
}

.nav-item.active {
    background-color: rgba(255, 255, 255, 0.1);
    color: white;
    border-left-color: var(--accent-color);
}

.nav-icon {
    width: 20px;
    text-align: center;
    font-size: 1.1rem;
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: 260px;
    padding: var(--spacing-lg);
    max-width: calc(100vw - 260px);
}

.top-bar {
    background: var(--bg-surface);
    padding: 0 var(--spacing-lg);
    height: 64px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
    position: sticky;
    top: var(--spacing-lg);
    z-index: 40;
}

.page-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

/* Cards */
.card {
    background: var(--bg-surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    border: 1px solid rgba(255, 255, 255, 0.5);
}

.card-header {
    font-size: 1.0rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--text-main);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--border-color);
}

/* Data Tables */
.table-container {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

th {
    text-align: left;
    padding: 12px 16px;
    background-color: #f8fafc;
    color: var(--text-muted);
    font-weight: 600;
    border-bottom: 1px solid var(--border-color);
    white-space: nowrap;
}

td {
    padding: 16px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-main);
    vertical-align: middle;
}

tr:hover td {
    background-color: #f8fafc;
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 10px;
    border-radius: 99px;
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-success {
    background: var(--status-success-bg);
    color: var(--status-success-text);
}

.badge-warning {
    background: var(--status-warning-bg);
    color: var(--status-warning-text);
}

.badge-danger {
    background: var(--status-danger-bg);
    color: var(--status-danger-text);
}

.badge-info {
    background: var(--status-info-bg);
    color: var(--status-info-text);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    border: 1px solid transparent;
    transition: all 0.2s;
    font-size: 0.9rem;
    gap: 8px;
}

.btn-sm {
    padding: 4px 12px;
    font-size: 0.8rem;
}

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

.btn-primary:hover {
    background-color: var(--primary-light);
    box-shadow: 0 2px 4px rgba(15, 37, 87, 0.3);
}

.btn-outline {
    background-color: transparent;
    border-color: var(--border-color);
    color: var(--text-main);
}

.btn-outline:hover {
    background-color: #f8fafc;
    border-color: #cbd5e1;
}

/* Dashboard Grid */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.stat-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.stat-content h3 {
    font-size: 0.875rem;
    color: var(--text-muted);
    font-weight: 500;
    margin-bottom: 4px;
}

.stat-content .value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--primary-color);
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background-color: #eff6ff;
    color: var(--accent-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

/* Utilities */
.text-right {
    text-align: right;
}

.mb-4 {
    margin-bottom: var(--spacing-lg);
}

.mt-4 {
    margin-top: var(--spacing-lg);
}

.flex-between {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.text-danger {
    color: var(--danger-color);
}

.text-success {
    color: var(--success-color);
}

/* Tabs */
.tabs {
    display: flex;
    gap: 2px;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: var(--spacing-lg);
}

.tab-item {
    padding: 12px 24px;
    font-weight: 500;
    color: var(--text-muted);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: all 0.2s;
}

.tab-item:hover {
    color: var(--primary-color);
}

.tab-item.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
    font-weight: 600;
}

/* Forms */
.form-group {
    margin-bottom: var(--spacing-md);
}

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-main);
    margin-bottom: 6px;
}

.form-control {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    transition: all 0.2s;
    font-family: inherit;
}

.form-control:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.search-bar {
    position: relative;
    max-width: 400px;
}

.search-bar i {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
}

.search-bar input {
    padding-left: 36px;
}