/* Professional Admin Theme for Fayuan */
:root {
    /* Color Palette - Modern & Professional */
    --primary-color: #2563eb;       /* Modern Blue */
    --primary-hover: #1d4ed8;       /* Darker Blue */
    --secondary-color: #64748b;     /* Slate Gray */
    --success-color: #10b981;       /* Emerald */
    --warning-color: #f59e0b;       /* Amber */
    --danger-color: #ef4444;        /* Red */
    --info-color: #3b82f6;          /* Blue */
    
    /* Backgrounds & Surfaces */
    --bg-body: #f1f5f9;             /* Light Slate Background */
    --bg-surface: #ffffff;          /* White Surface */
    --bg-sidebar: #0f172a;          /* Dark Slate Sidebar */
    
    /* Text Colors */
    --text-main: #1e293b;           /* Dark Slate */
    --text-muted: #64748b;          /* Medium Slate */
    --text-light: #94a3b8;          /* Light Slate */
    
    /* Borders & Shadows */
    --border-color: #e2e8f0;
    --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);
    
    /* Transitions */
    --transition-base: all 0.2s ease-in-out;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-body);
    color: var(--text-main);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    color: var(--text-main);
    letter-spacing: -0.025em;
}

a {
    text-decoration: none;
    transition: var(--transition-base);
}

/* Navbar / Header */
.navbar-custom {
    background-color: var(--bg-surface);
    box-shadow: var(--shadow-sm);
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-color);
}

.navbar-brand {
    font-weight: 700;
    color: var(--primary-color) !important;
    font-size: 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.navbar-nav .nav-link {
    color: var(--text-muted) !important;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 0.375rem;
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link.active {
    color: var(--primary-color) !important;
    background-color: rgba(37, 99, 235, 0.05);
}

/* Cards */
.card {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-base);
    margin-bottom: 1.5rem;
}

.card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.card-header {
    background-color: transparent;
    border-bottom: 1px solid var(--border-color);
    padding: 1.25rem 1.5rem;
    font-weight: 600;
    color: var(--text-main);
}

.card-body {
    padding: 1.5rem;
}

/* Buttons */
.btn {
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    transition: var(--transition-base);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    box-shadow: 0 1px 2px 0 rgba(37, 99, 235, 0.3);
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    border-color: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 6px -1px rgba(37, 99, 235, 0.4);
}

/* Tables */
.table-responsive {
    border-radius: 0.75rem;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.table {
    margin-bottom: 0;
    background-color: var(--bg-surface);
}

.table th {
    background-color: #f8fafc;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.table td {
    padding: 1rem 1.5rem;
    vertical-align: middle;
    color: var(--text-main);
    border-bottom: 1px solid var(--border-color);
}

.table tbody tr:hover {
    background-color: #f8fafc;
}

/* Badges */
.badge {
    padding: 0.35em 0.65em;
    font-weight: 600;
    border-radius: 9999px;
    font-size: 0.75rem;
}

/* Forms */
.form-control, .form-select {
    border-radius: 0.5rem;
    border-color: var(--border-color);
    padding: 0.625rem 1rem;
    font-size: 0.95rem;
    transition: var(--transition-base);
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-label {
    font-weight: 500;
    color: var(--text-main);
    margin-bottom: 0.5rem;
}

/* Login Page Specifics */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    position: relative;
    overflow: hidden;
}

.login-page::before {
    content: '';
    position: absolute;
    width: 120%;
    height: 120%;
    background: radial-gradient(circle at 50% 50%, rgba(37, 99, 235, 0.05) 0%, transparent 50%);
    z-index: 0;
}

.login-card-wrapper {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 420px;
    padding: 1rem;
}

.login-card {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(20px);
    border-radius: 1.5rem;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.5);
    padding: 2.5rem;
}

.login-header {
    text-align: center;
    margin-bottom: 2rem;
}

.login-logo {
    width: 64px;
    height: 64px;
    background: var(--primary-color);
    color: white;
    border-radius: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    margin: 0 auto 1.5rem;
    box-shadow: 0 10px 15px -3px rgba(37, 99, 235, 0.3);
}

.login-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 0.5rem;
}

.login-subtitle {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* Dashboard Specifics */
.stats-card {
    position: relative;
    overflow: hidden;
}

.stats-card .icon-wrapper {
    position: absolute;
    right: 1.5rem;
    top: 1.5rem;
    opacity: 0.1;
    font-size: 3rem;
    color: currentColor;
}

.stats-value {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
    line-height: 1.2;
}

.stats-label {
    color: var(--text-muted);
    font-size: 0.875rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Page Header */
.page-header {
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.page-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-main);
}

.page-subtitle {
    color: var(--text-muted);
    margin-top: 0.25rem;
}