/* Modern Beautiful Admin UI CSS */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* Enhanced Color Palette & Variables */
:root {
    /* Primary Colors */
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --primary-color: #667eea;
    --primary-dark: #5a67d8;
    --accent-color: #4fd1c7;
    --accent-dark: #38b2ac;
    
    /* Neutral Colors */
    --text-primary: #1a202c;
    --text-secondary: #4a5568;
    --text-muted: #718096;
    --bg-primary: #f7fafc;
    --bg-secondary: #edf2f7;
    --surface: rgba(255, 255, 255, 0.95);
    --surface-hover: rgba(255, 255, 255, 0.98);
    
    /* Semantic Colors */
    --success: #48bb78;
    --success-bg: rgba(72, 187, 120, 0.1);
    --error: #f56565;
    --error-bg: rgba(245, 101, 101, 0.1);
    --warning: #ed8936;
    --warning-bg: rgba(237, 137, 54, 0.1);
    --info: #4299e1;
    --info-bg: rgba(66, 153, 225, 0.1);
    
    /* Shadows & Effects */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --glow: 0 0 20px rgba(102, 126, 234, 0.3);
    
    /* Glass Effect */
    --glass-bg: rgba(255, 255, 255, 0.1);
    --glass-border: rgba(255, 255, 255, 0.2);
    --backdrop-blur: blur(20px);
    
    /* Transitions */
    --transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: all 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
}

/* Dark Theme Variables */
[data-theme="dark"] {
    --text-primary: #f7fafc;
    --text-secondary: #e2e8f0;
    --text-muted: #a0aec0;
    --bg-primary: #1a202c;
    --bg-secondary: #2d3748;
    --surface: rgba(45, 55, 72, 0.95);
    --surface-hover: rgba(45, 55, 72, 0.98);
    --glass-bg: rgba(45, 55, 72, 0.1);
    --glass-border: rgba(255, 255, 255, 0.1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Mongolian Baiti', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-primary);
    background-image: 
        radial-gradient(circle at 20% 80%, rgba(120, 119, 198, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 119, 198, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(120, 219, 226, 0.15) 0%, transparent 50%);
    color: var(--text-primary);
    line-height: 1.6;
    font-weight: 400;
    transition: var(--transition-smooth);
    overflow-x: hidden;
}

/* Container Styles */
.admin-container {
    position: relative;
    backdrop-filter: var(--backdrop-blur);
    -webkit-backdrop-filter: var(--backdrop-blur);
}

.admin-login-container,
.admin-dashboard-container,
.admin-form-container,
.admin-content-container {
    background: var(--surface);
    backdrop-filter: var(--backdrop-blur);
    -webkit-backdrop-filter: var(--backdrop-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-xl);
    margin: var(--space-2xl) auto;
    padding: var(--space-2xl);
    position: relative;
    transition: var(--transition-smooth);
    overflow: hidden;
}

.admin-login-container::before,
.admin-dashboard-container::before,
.admin-form-container::before,
.admin-content-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--primary-gradient);
    opacity: 0.8;
}

.admin-login-container {
    max-width: 440px;
    text-align: center;
    margin-top: 8vh;
    animation: slideUp 0.8s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

.admin-form-container {
    max-width: 700px;
    text-align: left;
}

.admin-content-container {
    max-width: 1400px;
}

.admin-dashboard-container {
    max-width: 1200px;
}

.admin-login-container:hover,
.admin-dashboard-container:hover,
.admin-form-container:hover,
.admin-content-container:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl), var(--glow);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--space-lg);
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

h2 {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: var(--space-xl);
    position: relative;
    animation: fadeInDown 0.6s ease-out 0.2s both;
}

h2::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: var(--primary-gradient);
    border-radius: 2px;
}

h3 {
    font-size: 1.8rem;
    text-align: center;
    margin-bottom: var(--space-lg);
    font-weight: 600;
    animation: fadeInDown 0.6s ease-out 0.4s both;
}

/* Form Elements */
.form-group {
    position: relative;
    margin-bottom: var(--space-xl);
}

label {
    display: block;
    margin-bottom: var(--space-sm);
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    transition: var(--transition-fast);
}

.input-wrapper {
    position: relative;
}

input[type="text"],
input[type="password"],
input[type="email"],
input[type="number"],
input[type="tel"],
input[type="date"],
input[type="url"],
textarea,
select {
    width: 100%;
    padding: var(--space-lg) var(--space-md);
    border: 2px solid transparent;
    border-radius: var(--radius-lg);
    font-size: 1rem;
    background: var(--surface);
    color: var(--text-primary);
    transition: var(--transition-smooth);
    box-shadow: var(--shadow-sm);
    outline: none;
    font-family: Mongolian Baiti;
}

input[type="text"]:focus,
input[type="password"]:focus,
input[type="email"]:focus,
input[type="number"]:focus,
input[type="tel"]:focus,
input[type="date"]:focus,
input[type="url"]:focus,
textarea:focus,
select:focus {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md), 0 0 0 3px rgba(102, 126, 234, 0.1);
    transform: translateY(-1px);
}

textarea {
    resize: vertical;
    min-height: 120px;
    line-height: 1.6;
}

.input-wrapper::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: var(--radius-lg);
    background: var(--primary-gradient);
    opacity: 0;
    transition: var(--transition-fast);
    pointer-events: none;
    z-index: -1;
    padding: 2px;
}

.input-wrapper:focus-within::before {
    opacity: 1;
}

/* File Upload */
input[type="file"] {
    display: none;
}

.file-upload-wrapper {
    position: relative;
    display: inline-block;
    width: 100%;
    cursor: pointer;
}

.file-upload-label {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-xl);
    border: 2px dashed var(--primary-color);
    border-radius: var(--radius-lg);
    background: var(--primary-gradient);
    background-clip: padding-box;
    color: white;
    font-weight: 600;
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

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

.file-upload-label::before {
    content: '📁';
    font-size: 1.5rem;
    margin-right: var(--space-sm);
}

/* Buttons */
.btn {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-md) var(--space-xl);
    border: none;
    border-radius: var(--radius-lg);
    font-size: 1rem;
    font-weight: 600;
    font-family: Mongolian Baiti;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition-smooth);
    overflow: hidden;
    min-width: 120px;
    box-shadow: var(--shadow-sm);
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: var(--transition-smooth);
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: var(--primary-gradient);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), var(--glow);
}

.btn-secondary {
    background: var(--surface);
    color: var(--text-primary);
    border: 1px solid var(--glass-border);
}

.btn-secondary:hover {
    background: var(--surface-hover);
    transform: translateY(-1px);
}

.btn-success {
    background: linear-gradient(135deg, var(--success) 0%, #38a169 100%);
    color: white;
}

.btn-danger {
    background: linear-gradient(135deg, var(--error) 0%, #e53e3e 100%);
    color: white;
}

.btn-danger:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), 0 0 20px rgba(245, 101, 101, 0.3);
}

/* Messages */
.message {
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-lg);
    font-weight: 500;
    border-left: 4px solid;
    animation: slideInRight 0.5s ease-out;
    position: relative;
    overflow: hidden;
}

.message::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: inherit;
    opacity: 0.1;
    z-index: -1;
}

.message-success {
    background: var(--success-bg);
    color: var(--success);
    border-color: var(--success);
}

.message-error {
    background: var(--error-bg);
    color: var(--error);
    border-color: var(--error);
}

.message-warning {
    background: var(--warning-bg);
    color: var(--warning);
    border-color: var(--warning);
}

.message-info {
    background: var(--info-bg);
    color: var(--info);
    border-color: var(--info);
}

/* Dashboard Navigation */
.dashboard-nav {
    margin-top: var(--space-xl);
}

.dashboard-nav ul {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-lg);
    margin: 0;
    padding: 0;
}

.dashboard-nav ul li {
    position: relative;
}

.dashboard-nav ul li a {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-lg);
    background: var(--surface);
    backdrop-filter: var(--backdrop-blur);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    text-decoration: none;
    border-radius: var(--radius-lg);
    font-weight: 600;
    font-size: 1.1rem;
    transition: var(--transition-smooth);
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
}

.dashboard-nav ul li a::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--primary-gradient);
    transition: var(--transition-smooth);
    z-index: -1;
}

.dashboard-nav ul li a:hover {
    color: white;
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.dashboard-nav ul li a:hover::before {
    left: 0;
}

/* Tables */
.table-wrapper {
    background: var(--surface);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    margin-top: var(--space-xl);
    border: 1px solid var(--glass-border);
}

table {
    width: 100%;
    border-collapse: collapse;
    background: transparent;
}

th, td {
    padding: var(--space-lg);
    text-align: left;
    border-bottom: 1px solid var(--glass-border);
    transition: var(--transition-fast);
}

th {
    background: var(--primary-gradient);
    color: white;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-size: 0.875rem;
    position: sticky;
    top: 0;
    z-index: 10;
}

tr:hover {
    background: rgba(102, 126, 234, 0.05);
    transform: scale(1.01);
}

td img {
    width: 80px;
    height: 60px;
    object-fit: cover;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-smooth);
}

td img:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-md);
}

/* Action Links */
.actions {
    display: flex;
    gap: var(--space-sm);
    align-items: center;
}

.actions a {
    display: inline-flex;
    align-items: center;
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    transition: var(--transition-fast);
    border: 1px solid transparent;
}

.actions .edit-btn {
    color: var(--info);
    background: var(--info-bg);
    border-color: var(--info);
}

.actions .delete-btn {
    color: var(--error);
    background: var(--error-bg);
    border-color: var(--error);
}

.actions a:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

/* Form Sections */
.form-section {
    background: var(--surface);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    margin-bottom: var(--space-xl);
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow-sm);
    position: relative;
}

.form-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--primary-gradient);
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.form-section h3 {
    margin-top: 0;
    color: var(--primary-color);
}

/* Current Logo Display */
.current-logo {
    text-align: center;
    margin: var(--space-lg) 0;
}

.current-logo img {
    max-width: 150px;
    height: auto;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: var(--transition-smooth);
}

.current-logo img:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-lg);
}

/* Checkboxes */
input[type="checkbox"] {
    position: relative;
    width: 20px;
    height: 20px;
    margin-right: var(--space-sm);
    cursor: pointer;
    appearance: none;
    background: var(--surface);
    border: 2px solid var(--primary-color);
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
}

input[type="checkbox"]:checked {
    background: var(--primary-gradient);
    border-color: var(--primary-color);
}

input[type="checkbox"]:checked::after {
    content: '✓';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-weight: bold;
    font-size: 12px;
}

/* Back Links and Logout */
.back-link,
.logout-btn {
    display: inline-flex;
    align-items: center;
    margin-top: var(--space-xl);
    background: var(--error);
    background: linear-gradient(135deg, var(--error) 0%, #e53e3e 100%);
    color: white;
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-lg);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition-smooth);
    box-shadow: var(--shadow-sm);
}

.back-link:hover,
.logout-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), 0 0 20px rgba(245, 101, 101, 0.3);
}

/* Animations */
@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

/* Loading States */
.loading {
    animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .admin-content-container {
        max-width: 95%;
    }
    
    .dashboard-nav ul {
        grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    }
}

@media (max-width: 768px) {
    :root {
        --space-xs: 0.125rem;
        --space-sm: 0.25rem;
        --space-md: 0.75rem;
        --space-lg: 1rem;
        --space-xl: 1.5rem;
        --space-2xl: 2rem;
    }
    
    .admin-login-container,
    .admin-dashboard-container,
    .admin-form-container,
    .admin-content-container {
        padding: var(--space-lg);
        margin: var(--space-lg) auto;
        max-width: 95%;
    }
    
    h2 {
        font-size: 2rem;
    }
    
    h3 {
        font-size: 1.5rem;
    }
    
    .dashboard-nav ul {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }
    
    /* Mobile Table Styles */
    .table-wrapper {
        overflow-x: auto;
    }
    
    .mobile-table {
        display: block;
        width: 100%;
    }
    
    .mobile-table thead {
        display: none;
    }
    
    .mobile-table tbody {
        display: block;
    }
    
    .mobile-table tr {
        display: block;
        background: var(--surface);
        border-radius: var(--radius-lg);
        margin-bottom: var(--space-md);
        padding: var(--space-md);
        box-shadow: var(--shadow-sm);
        border: 1px solid var(--glass-border);
    }
    
    .mobile-table td {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: var(--space-sm) 0;
        border: none;
        border-bottom: 1px solid var(--glass-border);
    }
    
    .mobile-table td:last-child {
        border-bottom: none;
    }
    
    .mobile-table td::before {
        content: attr(data-label);
        font-weight: 600;
        color: var(--text-secondary);
        flex: 1;
    }
    
    .mobile-table td .actions {
        flex: 1;
        justify-content: flex-end;
    }
}

@media (max-width: 480px) {
    .admin-login-container,
    .admin-dashboard-container,
    .admin-form-container,
    .admin-content-container {
        margin: var(--space-md) auto;
        padding: var(--space-md);
    }
    
    .btn {
        width: 100%;
        margin-bottom: var(--space-sm);
    }
    
    .actions {
        flex-direction: column;
        gap: var(--space-xs);
    }
    
    .actions a {
        width: 100%;
        justify-content: center;
    }
}

/* Print Styles */
@media print {
    body {
        background: white;
        color: black;
    }
    
    .admin-login-container,
    .admin-dashboard-container,
    .admin-form-container,
    .admin-content-container {
        box-shadow: none;
        border: 1px solid #ccc;
        background: white;
    }
    
    .btn,
    .back-link,
    .logout-btn,
    .actions a {
        display: none;
    }
    
    .dashboard-nav {
        display: none;
    }
}

/* Accessibility Improvements */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
    :root {
        --surface: #ffffff;
        --text-primary: #000000;
        --primary-color: #0000ff;
        --accent-color: #ff0000;
    }
}

/* Focus Visible for Better Accessibility */
:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}