:root {
    --bg-color: #f9fafb;
    --text-color: #111827;
    --text-muted: #6b7280;
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --card-bg: #ffffff;
    --border: #e5e7eb;
    --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);
    --radius: 0.5rem;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg-color: #111827;
        --text-color: #f9fafb;
        --text-muted: #9ca3af;
        --card-bg: #1f2937;
        --border: #374151;
        --primary: #3b82f6;
    }
}

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

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.5;
    transition: background-color 0.3s ease;
}

a {
    color: inherit;
    text-decoration: none;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

header {
    background-color: var(--card-bg);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 50;
    padding: 1rem 0;
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.025em;
    color: var(--primary);
}

nav a {
    margin-left: 1.5rem;
    font-weight: 500;
}

nav a:hover {
    color: var(--primary);
}

.hero {
    padding: 5rem 0;
    text-align: center;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 800;
    letter-spacing: -0.05em;
    margin-bottom: 1.5rem;
    line-height: 1.1;
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto 2.5rem;
}

.search-box {
    display: flex;
    max-width: 600px;
    margin: 0 auto;
    box-shadow: var(--shadow-md);
    border-radius: var(--radius);
    overflow: hidden;
}

.search-box input {
    flex: 1;
    padding: 1rem 1.5rem;
    border: none;
    font-size: 1rem;
    outline: none;
    background: var(--card-bg);
    color: var(--text-color);
}

.search-box button {
    background-color: var(--primary);
    color: white;
    border: none;
    padding: 0 2rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s;
}

.search-box button:hover {
    background-color: var(--primary-hover);
}

/* Prompt Grid */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
    margin: 3rem 0;
}

.card {
    background-color: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    display: flex;
    flex-direction: column;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.card-tag {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--primary);
    margin-bottom: 0.5rem;
}

.card-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.card-desc {
    color: var(--text-muted);
    font-size: 0.875rem;
    margin-bottom: 1.5rem;
    flex: 1;
}

.btn {
    display: inline-block;
    background: var(--bg-color);
    border: 1px solid var(--border);
    padding: 0.5rem 1rem;
    border-radius: var(--radius);
    font-weight: 500;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
}

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

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

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

/* Prompt Detail */
.prompt-header {
    margin-bottom: 2rem;
    padding: 2rem 0 1rem 0;
}

.prompt-content-box {
    background-color: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2rem;
    position: relative;
    font-family: monospace;
    font-size: 1.1rem;
    white-space: pre-wrap;
    line-height: 1.6;
}

.copy-btn {
    position: absolute;
    top: 1rem;
    right: 1rem;
}

/* Responsive Header */
.site-header {
    background-color: var(--card-bg);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 50;
    padding: 1rem 0;
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-color);
    cursor: pointer;
    padding: 0.5rem;
}

.main-nav {
    display: flex;
    align-items: center;
}

.btn-login {
    background: var(--primary);
    color: white !important;
    padding: 0.5rem 1rem;
    border-radius: var(--radius);
    margin-left: 1.5rem;
}

.btn-login:hover {
    background: var(--primary-hover);
}

/* Responsive Footer */
.site-footer {
    background-color: var(--card-bg);
    border-top: 1px solid var(--border);
    margin-top: 4rem;
    padding-top: 4rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-title {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--text-color);
}

.footer-col a {
    display: block;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
    font-size: 0.95rem;
    transition: color 0.2s;
}

.footer-col a:hover {
    color: var(--primary);
}

.footer-bottom {
    border-top: 1px solid var(--border);
    padding: 2rem 0;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.9rem;
}

@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: block;
    }

    .main-nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--card-bg);
        flex-direction: column;
        border-bottom: 1px solid var(--border);
        box-shadow: var(--shadow-md);
        padding: 1rem 0;
    }

    .main-nav.active {
        display: flex;
    }

    .main-nav a {
        margin: 0;
        padding: 1rem 2rem;
        width: 100%;
        text-align: center;
    }
    
    .btn-login {
        margin: 1rem 2rem;
        width: auto;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    /* Admin Panel Responsive */
    .admin-layout {
        flex-direction: column;
    }
    .sidebar {
        width: 100%;
        border-right: none;
        border-bottom: 1px solid var(--border);
    }
    .admin-content table, 
    .admin-content thead, 
    .admin-content tbody, 
    .admin-content th, 
    .admin-content td, 
    .admin-content tr { 
        display: block; 
    }
    .admin-content thead tr { 
        position: absolute;
        top: -9999px;
        left: -9999px;
    }
    .admin-content td { 
        border: none;
        position: relative;
        padding-left: 50%; 
        border-bottom: 1px solid var(--border);
    }
    .admin-content td:before { 
        position: absolute;
        top: 1rem;
        left: 1rem;
        width: 45%; 
        padding-right: 10px; 
        white-space: nowrap;
        font-weight: 600;
        content: attr(data-label);
    }
}

/* Admin Panel Styles */
.admin-layout {
    display: flex;
    min-height: 100vh;
}
.sidebar {
    width: 260px;
    background: var(--card-bg);
    border-right: 1px solid var(--border);
    padding: 2rem 1rem;
    position: sticky;
    top: 0;
    height: 100vh;
}
.admin-nav {
    display: flex;
    flex-direction: column;
}
.admin-nav a {
    display: block;
    padding: 0.75rem 1rem;
    color: var(--text-color);
    font-weight: 500;
    border-radius: var(--radius);
    margin-bottom: 0.5rem;
    transition: all 0.2s;
}
.admin-nav a:hover, .admin-nav a.active {
    background: var(--primary);
    color: white;
}
.admin-nav a.active {
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}
.admin-content {
    flex: 1;
    padding: 3rem;
    background: var(--bg-color);
    max-width: 100%;
}

/* Pagination Styles */
.pagination {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 2rem;
}
.page-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: var(--radius);
    background: var(--card-bg);
    border: 1px solid var(--border);
    color: var(--text-color);
    font-weight: 500;
    transition: all 0.2s;
}
.page-link:hover, .page-link.active {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

/* Premium Admin Improvements */
.admin-content h1 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 2rem;
    color: var(--text-color);
}
.admin-content table {
    width: 100%;
    background: var(--card-bg);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
    border-collapse: collapse;
}
.admin-content th {
    background: #f8fafc;
    color: #475569;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.05em;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border);
}
.admin-content td {
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border);
    vertical-align: middle;
    color: #334155;
}
.admin-content tr:last-child td {
    border-bottom: none;
}
.admin-content tr:hover {
    background: #f1f5f9;
}
.admin-content .action-link {
    font-weight: 500;
    margin-right: 1rem;
    transition: color 0.2s;
}
.admin-content .action-link.delete-link {
    color: #ef4444;
}
.admin-content .action-link:hover {
    opacity: 0.7;
}

/* Form Improvements for Admin */
.admin-content .card {
    background: var(--card-bg);
    padding: 2.5rem;
    border-radius: var(--radius);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.05);
    border: 1px solid var(--border);
}
.admin-content .form-group label {
    font-weight: 600;
    color: #334155;
    margin-bottom: 0.5rem;
    display: block;
}
.admin-content .form-control {
    background: #f8fafc;
    border: 1px solid #cbd5e1;
    border-radius: 6px;
    padding: 0.75rem 1rem;
    transition: all 0.2s;
}
.admin-content .form-control:focus {
    background: #fff;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* Modern Pagination UI */
.pagination-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
    width: 100%;
}
.page-numbers {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}
.page-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 12px;
    border-radius: 8px;
    background: transparent;
    color: var(--text-muted);
    font-weight: 600;
    transition: all 0.2s;
    text-decoration: none;
    border: 1px solid transparent;
    line-height: 1;
}
.page-link:hover {
    background: #f1f5f9;
    color: #334155;
}
.page-link.active {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
    box-shadow: 0 4px 10px rgba(37, 99, 235, 0.25);
}
.page-link svg {
    margin: 0 4px;
    display: block;
}
.page-prev, .page-next {
    border: 1px solid var(--border);
    background: white;
    box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    padding: 0 16px;
}
.page-dots {
    color: var(--text-muted);
    font-weight: 600;
    padding: 0 0.5rem;
}
@media (max-width: 600px) {
    .pagination-wrapper { flex-direction: column; gap: 1.5rem; }
    .page-numbers { order: -1; flex-wrap: wrap; justify-content: center; }
}