/* Forms - Brutalist */
.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 700;
    color: var(--text-color);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Search Input - Brutalist */
.search-input {
    margin-bottom: 1rem;
}

.search-input input {
    width: 100%;
    padding: 1rem;
    border: 3px solid var(--border-color);
    font-size: 1rem;
    background: var(--surface-color);
    color: var(--text-color);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-weight: 600;
}

.search-input input:focus,
.search-input input:focus-visible {
    outline: 3px solid var(--accent-color);
    outline-offset: 2px;
    border-color: var(--accent-color);
}

.search-input input::placeholder {
    color: var(--text-tertiary);
    text-transform: uppercase;
    font-weight: 700;
    letter-spacing: 0.05em;
}

/* Override browser autofill styling */
.search-input input:-webkit-autofill {
    -webkit-box-shadow: 0 0 0 1000px var(--surface-color) inset;
    -webkit-text-fill-color: var(--text-color);
}

@media (max-width: 639px) {
    .search-input input { font-size: 1.0625rem; }
}

/* Standard Inputs - Classic Style */
.form-group input[type="text"],
.form-group input[type="number"] {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 1rem;
    background: var(--surface-color);
    color: var(--text-color);
    font-family: Georgia, 'Times New Roman', serif;
}

.form-group input[type="text"]:focus,
.form-group input[type="text"]:focus-visible,
.form-group input[type="number"]:focus,
.form-group input[type="number"]:focus-visible {
    outline: 3px solid var(--accent-color);
    outline-offset: 2px;
    border-color: var(--accent-color);
}

/* Override browser autofill styling */
.form-group input:-webkit-autofill {
    -webkit-box-shadow: 0 0 0 1000px var(--surface-color) inset;
    -webkit-text-fill-color: var(--text-color);
}

/* Custom Styled Checkbox */
.form-group input[type="checkbox"] {
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    width: 20px;
    height: 20px;
    margin-right: 0.75rem;
    border: 2px solid var(--text-secondary);
    border-radius: 3px;
    background-color: var(--bg-primary);
    cursor: pointer;
    position: relative;
    vertical-align: middle;
}

.form-group input[type="checkbox"]:hover {
    border-color: var(--accent-color);
    background-color: rgba(166, 124, 82, 0.1);
}

.form-group input[type="checkbox"]:checked {
    background-color: var(--accent-color);
    border-color: var(--accent-color);
}

/* Checkmark */
.form-group input[type="checkbox"]:checked::after {
    content: '✓';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: var(--bg-primary);
    font-size: 14px;
    font-weight: bold;
}

.form-group input[type="checkbox"]:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

/* Better label styling for checkbox */
.form-group label {
    display: inline-flex;
    align-items: center;
    cursor: pointer;
    user-select: none;
}

@media (max-width: 639px) {
    .form-group input[type="text"],
    .form-group input[type="number"] {
        padding: 1rem;
        font-size: 1.0625rem;
    }
}

.form-row {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

.form-row .form-group {
    flex: 1;
}

/* Classic Range Slider */
input[type="range"] {
    -webkit-appearance: none;
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: var(--border-color);
    outline: none;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--accent-color);
    cursor: pointer;
    box-shadow: var(--shadow-sm);
    border: 2px solid var(--surface-color);
}

input[type="range"]::-webkit-slider-thumb:hover {
    background: var(--accent-hover);
}

input[type="range"]::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--accent-color);
    cursor: pointer;
    border: 2px solid var(--surface-color);
    box-shadow: var(--shadow-sm);
}

input[type="range"]::-moz-range-thumb:hover {
    background: var(--accent-hover);
}

@media (max-width: 639px) {
    input[type="range"]::-webkit-slider-thumb,
    input[type="range"]::-moz-range-thumb {
        width: 28px;
        height: 28px;
    }
}

/* Buttons - Brutalist Style */
.btn {
    padding: 1rem 2rem;
    border: 3px solid var(--bg-color);
    font-size: 1rem;
    font-weight: 900;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    box-shadow: var(--shadow);
}

.btn-primary {
    background: var(--accent-color);
    color: var(--bg-color);
}

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translate(2px, 2px);
    box-shadow: var(--shadow-sm);
}

.btn-primary:active {
    transform: translate(4px, 4px);
    box-shadow: 2px 2px 0 rgba(166, 124, 82, 0.3);
}

.btn-secondary {
    background: var(--card-bg);
    color: var(--accent-color);
    border: 3px solid var(--accent-color);
}

.btn-secondary:hover {
    background: var(--surface-color);
    transform: translate(2px, 2px);
    box-shadow: var(--shadow-sm);
}

@media (max-width: 639px) {
    .btn { min-height: 48px; }
}

/* Status Indicator - Classic Style */
.status-indicator {
    padding: 1rem 1.5rem;
    border-radius: 6px;
    margin-bottom: 2rem;
    font-weight: 500;
    text-align: center;
    display: none;
    border: 1px solid;
}

.status-indicator.loading {
    background: var(--surface-color);
    border-color: var(--warning-color);
    color: var(--warning-color);
}

.status-indicator.success {
    background: var(--surface-color);
    border-color: var(--success-color);
    color: var(--success-color);
}

.status-indicator.error {
    background: var(--surface-color);
    border-color: var(--error-color);
    color: var(--error-color);
}

/* Results */
.results-container {
    min-height: 200px;
}

.placeholder {
    text-align: center;
    color: var(--text-secondary);
    padding: 3rem;
}

.no-results {
    text-align: center;
    color: var(--warning-color);
    padding: 2rem;
    font-weight: 500;
}

.results-summary {
    background-color: var(--surface-color);
    padding: 1.5rem;
    border-radius: 6px;
    margin-bottom: 2rem;
    border-left: 3px solid var(--accent-color);
    display: flex;
    align-items: center;
    gap: 1rem;
}

.results-summary p {
    flex: 1;
    margin: 0;
}

/* Circular loading spinner */
.loading-spinner {
    width: 20px;
    height: 20px;
    border: 3px solid var(--border-color);
    border-top-color: var(--accent-color);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    flex-shrink: 0;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.paper-card {
    border: 2px solid var(--border-color);
    padding: 2rem;
    margin-bottom: 2.5rem;
    background: var(--card-bg);
    box-shadow: var(--shadow);
    position: relative;
    content-visibility: auto;
}

.paper-card:hover {
    border-color: var(--accent-color);
    box-shadow: var(--shadow-lg);
}

#results-container {
    contain: layout style;
}

@media (min-width: 640px) {
    .paper-card {
        padding: 2.25rem;
        margin-bottom: 2.75rem;
    }
}

@media (min-width: 1024px) {
    .paper-card {
        padding: 2.5rem;
        margin-bottom: 3rem;
    }
}

.paper-header {
    display: flex;
    align-items: start;
    margin-bottom: 1.5rem;
}

.paper-title-row {
    flex: 1;
    display: flex;
    align-items: start;
    gap: 1rem;
    flex-wrap: wrap;
}

.paper-header h3 {
    font-size: 1.5rem;
    font-weight: 900;
    line-height: 1.4;
    color: var(--text-color);
    letter-spacing: -0.02em;
    text-transform: none;
    flex: 1;
    min-width: 0;
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
}

/* Title Search Icon - Magnifying Glass */
.title-search-icon {
    cursor: pointer;
    color: var(--text-secondary);
    font-size: 1.1rem;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    min-width: 44px;
    min-height: 44px;
    margin-top: -0.125rem;
}

.title-search-icon:hover {
    color: var(--accent-color);
    background-color: rgba(166, 124, 82, 0.1);
    transform: scale(1.1);
}

.title-search-icon:active {
    transform: scale(0.95);
}

/* Keyboard focus state */
.title-search-icon:focus-visible {
    outline: 3px solid var(--accent-color);
    outline-offset: 2px;
}

.paper-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 1.5rem;
    font-size: 0.8125rem;
    color: var(--text-secondary);
}

.meta-item {
    padding: 0;
}

/* Research Metadata Badges */
.research-metadata-badges {
    display: flex;
    gap: 0.5rem;
    margin: 1rem 0 1.5rem 0;
    flex-wrap: wrap;
}

.metadata-badge {
    padding: 0.4rem 0.8rem;
    font-size: 0.6875rem;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    max-width: 100%;
    overflow: hidden;
    text-overflow: ellipsis;
    word-break: break-word;
    opacity: 0.85;
}

.badge-doi {
    background: var(--card-bg);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.badge-doi:hover {
    background: var(--surface-color);
    color: var(--accent-color);
    border-color: var(--accent-color);
}

.badge-open-access {
    background: var(--success-color);
    color: var(--bg-color);
    border: none;
}

.badge-preprint {
    background: var(--warning-color);
    color: var(--bg-color);
    border: none;
}

.badge-citations {
    background: var(--card-bg);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

/* Alternate PDF dropdown - used in rendering.js */
.alternate-pdf-list {
    list-style: none;
    padding: 8px;
    margin: 4px 0;
    background: var(--surface-color);
    border: 2px solid var(--border-color);
    border-radius: 0;
    position: absolute;
    z-index: 10;
    min-width: 200px;
    box-shadow: var(--shadow);
}

.alternate-pdf-list li {
    padding: 4px 0;
}

.alternate-pdf-list a {
    color: var(--accent-color);
    text-decoration: none;
    font-size: 0.875rem;
    display: block;
    padding: 4px 8px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.alternate-pdf-list a:hover {
    background-color: var(--surface-color);
    border-left: 3px solid var(--accent-color);
    text-decoration: none;
}

.paper-abstract {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 1.25rem;
    max-height: 120px;
    overflow: hidden;
    text-overflow: ellipsis;
    font-size: 0.9375rem;
    letter-spacing: 0.01em;
}

.paper-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

/* System Status - Brutalist */
.system-status {
    background-color: var(--card-bg);
    padding: 1.5rem;
    border-radius: 0;
    margin-top: 1rem;
    border: 3px solid var(--border-color);
}

.status-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 1rem;
}

.status-item {
    padding: 0.75rem;
    background: var(--surface-color);
    border-radius: 0;
    border: 2px solid var(--border-color);
    font-weight: 700;
    text-transform: uppercase;
    font-size: 0.8rem;
    letter-spacing: 0.05em;
}

details {
    margin-top: 1rem;
}

details summary {
    cursor: pointer;
    padding: 0.75rem;
    background-color: var(--surface-color);
    border: 2px solid var(--border-color);
    border-radius: 0;
    font-weight: 700;
    color: var(--text-color);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

details summary:hover {
    background-color: var(--card-bg);
    border-color: var(--accent-color);
}

details pre {
    margin-top: 0.5rem;
    padding: 1rem;
    background-color: var(--bg-color);
    border-radius: 6px;
    overflow-x: auto;
    font-size: 0.875rem;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

/* Footer - Minimalist */
footer {
    text-align: center;
    padding-top: 1.5rem;
    margin-top: 2rem;
    border-top: 1px solid var(--border-color);
    color: var(--text-tertiary);
    font-size: 0.8125rem;
}

footer p {
    margin: 0;
}

footer a {
    color: var(--text-secondary);
    text-decoration: none;
}

footer a:hover {
    color: var(--accent-color);
}

/* Sponsor Link - Inline Style */
.footer-sponsor-link {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.15s ease;
}

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

.sponsor-icon {
    font-size: 0.875rem;
    line-height: 1;
}

/* Bookmarks Controls - Brutalist */
.bookmarks-controls {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
    align-items: flex-end;
}

.bookmarks-controls .search-input {
    flex: 1;
    margin-bottom: 0;
}

.bookmarks-sort {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.bookmarks-sort label {
    font-weight: 700;
    color: var(--text-color);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.bookmarks-sort select {
    padding: 1rem;
    border: 3px solid var(--border-color);
    font-size: 1rem;
    background: var(--surface-color);
    color: var(--text-color);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-weight: 600;
    cursor: pointer;
    min-width: 180px;
}

.bookmarks-sort select:focus,
.bookmarks-sort select:focus-visible {
    outline: 3px solid var(--accent-color);
    outline-offset: 2px;
    border-color: var(--accent-color);
}

@media (max-width: 768px) {
    .bookmarks-controls {
        flex-direction: column;
        gap: 1rem;
    }

    .bookmarks-sort {
        width: 100%;
    }

    .bookmarks-sort select {
        width: 100%;
    }
}

/* Responsive */
@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }

    header h1 {
        font-size: 2rem;
    }

    section {
        padding: 1.5rem;
    }

    .form-row {
        flex-direction: column;
    }

    .paper-meta {
        flex-direction: column;
        gap: 0.5rem;
    }

    /* Mobile title improvements - maximize title space */
    .paper-card {
        padding: 1rem; /* Reduced from 1.5rem to gain space */
    }

    .paper-header h3 {
        font-size: 1.1rem;
        font-weight: 700;
        gap: 0.5rem; /* Reduced from 0.75rem */
        letter-spacing: 0; /* Changed from -0.02em for better small-screen readability */
        line-height: 1.35; /* Reduced from 1.4 to minimize wrapping */
    }
}