/* Library API Sandbox Styles */
:root {
    --bg-primary: #0b0f19;
    --bg-secondary: #1e293b;
    --border-color: #334155;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --accent-color: #38bdf8;
    --accent-hover: #0284c7;
    --accent-glow: rgba(56, 189, 248, 0.2);
    
    /* Subject Colors */
    --science-color: #3b82f6;
    --tech-color: #10b981;
    --history-color: #f59e0b;
    --fiction-color: #a855f7;
    --biography-color: #ec4899;
}

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

body {
    font-family: 'Outfit', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100vh;
}

#header-placeholder, #footer-placeholder {
    width: 100%;
}

.library-container {
    max-width: 900px;
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 32px;
    padding: 40px 20px;
}

.library-container header {
    text-align: center;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-bottom: 8px;
}

.logo h1 {
    font-size: 28px;
    font-weight: 800;
    letter-spacing: -0.5px;
}

.logo-icon {
    font-size: 32px;
    color: var(--accent-color);
    filter: drop-shadow(0 2px 8px var(--accent-glow));
}

.library-container header p {
    font-size: 14px;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.5;
}

.library-container header strong {
    color: var(--accent-color);
}

/* Filters Form Panel */
.filter-panel {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    padding: 24px;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.filters-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.filter-group label {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 6px;
}

.filter-group label i {
    color: var(--accent-color);
}

.filter-group select, .filter-group input {
    width: 100%;
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 10px 12px;
    border-radius: 8px;
    font-size: 14px;
    outline: none;
    font-family: inherit;
    transition: all 0.2s;
}

.filter-group select:focus, .filter-group input:focus {
    border-color: var(--accent-color);
}

.range-inputs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

.button-row {
    margin-top: 24px;
    display: flex;
    justify-content: flex-end;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: 8px;
    font-family: inherit;
    font-size: 14px;
    font-weight: 700;
    cursor: pointer;
    border: none;
    transition: all 0.25s;
}

.btn-run {
    background: linear-gradient(135deg, var(--accent-color), var(--accent-hover));
    color: var(--bg-primary);
    box-shadow: 0 4px 12px var(--accent-glow);
}

.btn-run:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 18px var(--accent-glow);
}

.btn-run:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

/* Results Catalog List */
.results-section {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.results-header {
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
}

.results-header h2 {
    font-size: 16px;
    font-weight: 700;
}

.results-header h2 span {
    color: var(--accent-color);
}

.table-container {
    overflow-x: auto;
    max-height: 480px;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
    text-align: left;
}

thead {
    background-color: rgba(255, 255, 255, 0.02);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 5;
}

th {
    padding: 14px 20px;
    font-weight: 600;
    color: var(--text-secondary);
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
}

td {
    padding: 14px 20px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-secondary);
}

tr:hover td {
    background-color: rgba(255, 255, 255, 0.01);
    color: var(--text-primary);
}

tr:last-child td {
    border-bottom: none;
}

td code {
    background-color: rgba(0, 0, 0, 0.3);
    padding: 2px 6px;
    border-radius: 4px;
    color: var(--accent-color);
    font-family: monospace;
}

.book-title {
    font-weight: 600;
    color: var(--text-primary);
}

.book-author {
    font-style: italic;
}

.book-price {
    font-weight: 600;
    color: #e2e8f0;
}

.placeholder-row {
    text-align: center;
    padding: 40px;
    color: var(--text-muted);
}

.placeholder-row.error {
    color: var(--fiction-color);
}

/* Tags styles */
.subject-tag {
    font-size: 11px;
    font-weight: 700;
    padding: 2px 8px;
    border-radius: 12px;
    text-transform: uppercase;
}

.subject-tag.science { background-color: rgba(59, 130, 246, 0.1); color: var(--science-color); }
.subject-tag.technology { background-color: rgba(16, 185, 129, 0.1); color: var(--tech-color); }
.subject-tag.history { background-color: rgba(245, 158, 11, 0.1); color: var(--history-color); }
.subject-tag.fiction { background-color: rgba(168, 85, 247, 0.1); color: var(--fiction-color); }
.subject-tag.biography { background-color: rgba(236, 72, 153, 0.1); color: var(--biography-color); }

/* Footer */
footer {
    text-align: center;
    margin-top: 12px;
}

.back-link {
    font-size: 13px;
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s;
}

.back-link:hover {
    color: var(--accent-color);
}

/* Custom scrollbars */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

/* Auth Mode Switcher Segment styling */
.auth-toggle-btn {
    background: none;
    border: none;
    padding: 8px 12px;
    border-radius: 6px;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 13px;
    font-weight: 600;
    font-family: inherit;
    transition: all 0.2s ease;
}

.auth-toggle-btn:hover {
    color: var(--text-primary);
}

.auth-toggle-btn.active {
    background-color: var(--accent-color);
    color: var(--bg-primary) !important;
}

.section-title {
    font-size: 12px;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 6px;
    margin-bottom: 16px;
}

.hidden {
    display: none !important;
}

/* HTTP Method Switcher Segment */
.method-toggle-btn {
    background: none;
    border: 1px solid var(--border-color);
    padding: 10px 14px;
    border-radius: 8px;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 14px;
    font-weight: 700;
    font-family: inherit;
    transition: all 0.2s ease;
    text-align: center;
}

.method-toggle-btn:hover {
    color: var(--text-primary);
    border-color: var(--text-secondary);
}

.method-toggle-btn.active {
    background-color: var(--bg-primary);
    border-color: var(--accent-color);
    color: var(--accent-color) !important;
}

/* POST Action Button custom background */
.btn-post {
    background: linear-gradient(135deg, #f59e0b, #d97706) !important;
    color: var(--bg-primary) !important;
    box-shadow: 0 4px 12px rgba(245, 158, 11, 0.3) !important;
}

.btn-post:hover {
    box-shadow: 0 6px 18px rgba(245, 158, 11, 0.5) !important;
}