/**
 * Modern UI Styles for Short URL Management System
 */

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

:root {
    --primary-color: #667eea;
    --primary-dark: #5568d3;
    --secondary-color: #764ba2;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --info-color: #3b82f6;
    --dark-color: #1f2937;
    --light-color: #f9fafb;
    --border-color: #e5e7eb;
    --text-color: #374151;
    --text-muted: #6b7280;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --radius: 8px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Helvetica Neue', sans-serif;
    color: var(--text-color);
    background-color: var(--light-color);
    line-height: 1.6;
}

/* Login Page */
.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
}

.login-container {
    width: 100%;
    max-width: 400px;
    padding: 1rem;
}

.login-box {
    background: white;
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

.login-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 2rem;
    text-align: center;
}

.login-header h1 {
    font-size: 1.75rem;
    margin-bottom: 0.5rem;
}

.login-header p {
    opacity: 0.9;
    font-size: 1rem;
}

.login-form {
    padding: 2.5rem 2rem;
}

.login-form .form-group {
    margin-bottom: 2rem;
}

.login-form .form-group label {
    display: block;
    margin-bottom: 0.75rem;
    font-weight: 600;
    color: var(--dark-color);
    font-size: 0.95rem;
}

.login-form .form-group input {
    width: 100%;
    padding: 1rem 1.25rem;
    border: 2px solid #e5e7eb;
    border-radius: 10px;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.login-form .form-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
}

.login-form button {
    margin-top: 1.5rem;
    width: 100%;
    padding: 1rem 1.5rem;
    font-size: 1.05rem;
    font-weight: 600;
    border-radius: 10px;
    transition: all 0.3s ease;
}

.login-form button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(102, 126, 234, 0.4);
}

.login-footer {
    background: var(--light-color);
    padding: 1rem;
    text-align: center;
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* Admin Header */
.admin-header {
    background: white;
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.header-left {
    display: flex;
    align-items: center;
}

.logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.header-nav {
    display: flex;
    gap: 0.5rem;
}

.nav-link {
    padding: 0.5rem 1rem;
    color: var(--text-color);
    text-decoration: none;
    border-radius: var(--radius);
    transition: all 0.2s;
    font-weight: 500;
}

.nav-link:hover {
    background: var(--light-color);
    color: var(--primary-color);
}

.nav-link.active {
    background: var(--primary-color);
    color: white;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.user-info {
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* Container */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

/* Page Header */
.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.page-header h1 {
    font-size: 2rem;
    color: var(--dark-color);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: white;
    border-radius: var(--radius);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: transform 0.2s, box-shadow 0.2s;
}

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

.stat-icon {
    font-size: 2.5rem;
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    border-radius: var(--radius);
}

.stat-content {
    flex: 1;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--dark-color);
    line-height: 1;
    margin-bottom: 0.25rem;
}

.stat-label {
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* Toolbar */
.toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
    gap: 1rem;
    flex-wrap: wrap;
}

.search-form {
    display: flex;
    gap: 0.5rem;
    flex: 1;
    max-width: 500px;
    flex-wrap: wrap;
}

@media screen and (max-width: 768px) {
    .search-form {
        flex-direction: column !important;
        max-width: 100% !important;
    }
}

.search-input {
    flex: 1;
    padding: 0.625rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    font-size: 0.875rem;
}

.date-input {
    max-width: 180px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    font-size: 0.875rem;
    font-weight: 600;
    text-decoration: none;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover {
    background: var(--light-color);
}

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

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

.btn-sm {
    padding: 0.375rem 0.75rem;
    font-size: 0.75rem;
}

.btn-block {
    width: 100%;
    justify-content: center;
}

/* Table */
.table-container {
    background: white;
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    overflow: hidden;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table thead {
    background: var(--light-color);
}

.data-table th {
    padding: 1rem;
    text-align: left;
    font-weight: 600;
    color: var(--dark-color);
    font-size: 0.875rem;
    border-bottom: 2px solid var(--border-color);
}

.data-table th a {
    color: var(--dark-color);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.data-table th a:hover {
    color: var(--primary-color);
}

.data-table td {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.875rem;
}

.data-table tbody tr:hover {
    background: var(--light-color);
}

.data-table tbody tr:last-child td {
    border-bottom: none;
}

/* Table Cells */
.url-cell {
    max-width: 300px;
}

.target-url {
    color: var(--primary-color);
    text-decoration: none;
    word-break: break-all;
}

.target-url:hover {
    text-decoration: underline;
}

.code-badge {
    background: var(--light-color);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--primary-color);
}

.external-link {
    margin-left: 0.5rem;
    text-decoration: none;
    opacity: 0.6;
    transition: opacity 0.2s;
}

.external-link:hover {
    opacity: 1;
}

.actions-cell {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.ua-cell {
    max-width: 400px;
    word-break: break-word;
    font-size: 0.8rem;
    line-height: 1.4;
}

.referer-cell {
    max-width: 200px;
    word-break: break-all;
}

/* Badges */
.badge {
    display: inline-block;
    padding: 0.25rem 0.625rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-info {
    background: #dbeafe;
    color: #1e40af;
}

.badge-success {
    background: #d1fae5;
    color: #065f46;
}

.badge-warning {
    background: #fef3c7;
    color: #92400e;
}

.badge-danger {
    background: #fee2e2;
    color: #991b1b;
}

/* Forms */
.form-container {
    background: white;
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    padding: 2rem;
    max-width: 800px;
}

.form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-weight: 600;
    color: var(--dark-color);
    font-size: 0.875rem;
}

.form-group input[type="text"],
.form-group input[type="url"],
.form-group input[type="password"],
.form-group select {
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    font-size: 0.875rem;
    transition: border-color 0.2s;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-group small {
    color: var(--text-muted);
    font-size: 0.75rem;
}

.form-actions {
    display: flex;
    gap: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

/* Alerts */
.alert {
    padding: 1rem 1.25rem;
    border-radius: var(--radius);
    margin-bottom: 1.5rem;
    border-left: 4px solid;
}

.alert-success {
    background: #d1fae5;
    border-color: var(--success-color);
    color: #065f46;
}

.alert-error {
    background: #fee2e2;
    border-color: var(--danger-color);
    color: #991b1b;
}

.alert-info {
    background: #dbeafe;
    border-color: var(--info-color);
    color: #1e40af;
}

.success-details {
    margin-top: 0.75rem;
    padding-top: 0.75rem;
    border-top: 1px solid rgba(0, 0, 0, 0.1);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.success-details a {
    color: inherit;
    word-break: break-all;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--text-muted);
}

.empty-state p {
    margin-bottom: 1.5rem;
    font-size: 1.125rem;
}

/* URL Info Box */
.url-info {
    background: var(--light-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.url-info h3 {
    margin-bottom: 0.75rem;
    color: var(--dark-color);
}

.url-info p {
    margin-bottom: 0.5rem;
}

.url-stats {
    display: flex;
    gap: 1.5rem;
    margin-top: 1rem;
    flex-wrap: wrap;
}

.url-stats span {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.url-info-box {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    border-radius: var(--radius);
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.url-info-box h3 {
    margin-bottom: 0.75rem;
}

.url-info-box code {
    background: rgba(255, 255, 255, 0.2);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
}

.url-info-box a {
    color: white;
    text-decoration: underline;
}

/* Pagination */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    padding: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.page-info {
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* Stats Summary */
.stats-summary {
    margin-bottom: 1rem;
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* Text Utilities */
.text-muted {
    color: var(--text-muted);
}

.filter-link {
    margin-left: 0.5rem;
    text-decoration: none;
    opacity: 0.6;
    transition: opacity 0.2s;
}

.filter-link:hover {
    opacity: 1;
}

/* Responsive */
@media screen and (max-width: 768px) {
    * {
        box-sizing: border-box;
    }
    
    body {
        overflow-x: hidden;
    }
    
    .container {
        padding: 1rem;
        width: 100%;
        max-width: 100%;
    }
    
    .login-container {
        padding: 0.5rem;
    }
    
    .login-box {
        margin: 0;
        padding: 1.5rem;
        width: 100%;
    }
    
    .login-header h1 {
        font-size: 1.5rem;
    }
    
    .login-form .form-group {
        margin-bottom: 1.5rem;
    }
    
    .login-form button {
        margin-top: 1rem;
    }
    
    .header-container {
        flex-direction: column;
        height: auto;
        padding: 1rem;
        gap: 1rem;
    }
    
    .header-nav {
        width: 100%;
        justify-content: center;
        flex-wrap: wrap;
        gap: 0.5rem;
    }
    
    .header-nav .nav-link {
        font-size: 0.85rem;
        padding: 0.5rem 0.75rem;
    }
    
    .header-right {
        width: 100%;
        justify-content: center;
        flex-wrap: wrap;
        gap: 0.5rem;
    }
    
    .page-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
    
    .toolbar {
        flex-direction: column;
        align-items: stretch;
        gap: 0.75rem;
    }
    
    .toolbar {
        width: 100% !important;
        display: flex !important;
        flex-direction: column !important;
    }
    
    .search-form {
        max-width: none !important;
        flex-direction: column !important;
        gap: 0.75rem !important;
        width: 100% !important;
        flex: none !important;
        display: flex !important;
    }
    
    .search-form input[type="date"],
    .search-form input[type="text"],
    .search-input,
    .date-input,
    input.search-input,
    input.date-input {
        width: 100% !important;
        max-width: 100% !important;
        flex: none !important;
        min-width: 100% !important;
        display: block !important;
        box-sizing: border-box !important;
    }
    
    .search-form button,
    .search-form a.btn,
    .search-form .btn,
    .search-form a,
    button.btn {
        width: 100% !important;
        flex: none !important;
        display: block !important;
        box-sizing: border-box !important;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .data-table {
        font-size: 0.75rem;
        display: block;
        overflow-x: auto;
    }
    
    .data-table th,
    .data-table td {
        padding: 0.5rem;
    }
    
    .ua-cell {
        max-width: 150px;
        font-size: 0.7rem;
    }
    
    .actions-cell {
        flex-direction: column;
        gap: 0.25rem;
    }
    
    .form-actions {
        flex-direction: column;
    }
    
    .form-container {
        padding: 1rem;
    }
    
    .info-box {
        padding: 0.75rem !important;
        font-size: 0.875rem;
    }
    
    .info-box h3 {
        font-size: 1rem;
    }
    
    .info-box ol {
        padding-left: 1.25rem !important;
        font-size: 0.85rem;
    }
    
    .info-box li {
        margin-bottom: 0.5rem;
    }
    
    .success-details {
        display: flex;
        flex-direction: column;
        gap: 0.5rem;
        margin-top: 0.75rem;
    }
    
    .success-details a {
        word-break: break-all;
        font-size: 0.875rem;
    }
    
    .success-details button {
        width: 100%;
        margin-top: 0.5rem;
    }
    
    .form-group label {
        font-size: 0.875rem;
    }
    
    .form-group input[type="text"],
    .form-group input[type="url"],
    .form-group input[type="password"],
    .form-group select {
        font-size: 0.875rem;
    }
    
    .form-group small {
        font-size: 0.75rem;
    }
    
    .btn {
        font-size: 0.875rem;
        padding: 0.625rem 1rem;
    }
    
    .btn-block {
        width: 100%;
    }
}

/* Code styling */
code {
    font-family: 'Courier New', monospace;
}