styles.css

/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #e0ecce 0%, #c8e6c9 100%);
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 0 0 20px 20px;
    margin-bottom: 30px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.header-content {
    padding: 40px 20px;
    text-align: center;
}

.title {
    font-size: 2.5rem;
    font-weight: 700;
    color: #2d3748;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
}

.title i {
    color: #689f38;
}

.subtitle {
    font-size: 1.1rem;
    color: #718096;
    font-weight: 400;
}

/* Main content */
.main-content {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 30px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    margin-bottom: 30px;
}

/* Search section */
.search-section {
    margin-bottom: 30px;
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    justify-content: center;
}

.search-container {
    max-width: 600px;
    margin: 0 auto;
    flex: 1;
    min-width: 300px;
}

.search-box {
    position: relative;
    display: flex;
    align-items: center;
    background: white;
    border-radius: 50px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    transition: all 0.3s ease;
}

.search-box:focus-within {
    box-shadow: 0 6px 25px rgba(104, 159, 56, 0.3);
    transform: translateY(-2px);
}

.remove-search-box:focus-within {
    box-shadow: 0 6px 25px rgba(220, 53, 69, 0.3);
}

.remove-search-box .search-icon {
    color: #dc3545;
}

.add-keyword-btn {
    position: absolute;
    right: 50px;
    background: #dc3545;
    border: none;
    color: white;
    cursor: pointer;
    padding: 8px;
    border-radius: 50%;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    z-index: 2;
}

.add-keyword-btn:hover {
    background: #c82333;
    transform: scale(1.1);
}

.search-add-btn {
    background: #689f38;
}

.search-add-btn:hover {
    background: #558b2f;
}

.search-keywords-container {
    margin-top: 10px;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    min-height: 20px;
}

.search-keyword-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    background: #689f38;
    color: white;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    animation: fadeIn 0.3s ease;
}

.search-keyword-tag:hover {
    background: #558b2f;
    transform: translateY(-1px);
}

.search-keyword-tag .remove-keyword {
    background: none;
    border: none;
    color: white;
    cursor: pointer;
    font-size: 10px;
    padding: 0;
    width: 16px;
    height: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: background-color 0.2s ease;
}

.search-keyword-tag .remove-keyword:hover {
    background: rgba(255, 255, 255, 0.2);
}

.remove-keywords-container {
    margin-top: 10px;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    min-height: 20px;
}

.remove-keyword-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    background: #dc3545;
    color: white;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    animation: fadeIn 0.3s ease;
}

.remove-keyword-tag:hover {
    background: #c82333;
    transform: translateY(-1px);
}

.remove-keyword-tag .remove-keyword {
    background: none;
    border: none;
    color: white;
    cursor: pointer;
    font-size: 10px;
    padding: 0;
    width: 16px;
    height: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: background-color 0.2s ease;
}

.remove-keyword-tag .remove-keyword:hover {
    background: rgba(255, 255, 255, 0.2);
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.search-icon {
    position: absolute;
    left: 20px;
    color: #a0aec0;
    font-size: 1.1rem;
    z-index: 1;
}

.search-input {
    flex: 1;
    padding: 18px 50px 18px 50px;
    border: none;
    outline: none;
    font-size: 1rem;
    background: transparent;
}

.search-input::placeholder {
    color: #a0aec0;
}

.clear-btn {
    position: absolute;
    right: 15px;
    background: none;
    border: none;
    color: #a0aec0;
    cursor: pointer;
    padding: 5px;
    border-radius: 50%;
    transition: all 0.2s ease;
    display: none;
    z-index: 3;
}

.clear-btn:hover {
    background: #f7fafc;
    color: #4a5568;
}

.clear-btn.visible {
    display: block;
}

.search-field-select {
    padding: 8px 12px;
    border: none;
    outline: none;
    background: #f7fafc;
    color: #2d3748;
    font-size: 0.9rem;
    border-radius: 6px;
    margin-right: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.search-field-select:hover {
    background: #edf2f7;
}

.search-field-select:focus {
    background: #e2e8f0;
    box-shadow: 0 0 0 2px rgba(104, 159, 56, 0.2);
}

.search-stats {
    text-align: center;
    margin-bottom: 15px;
    color: #718096;
    font-size: 0.9rem;
    min-height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Filters section */
.filters-section {
    margin-bottom: 25px;
    display: flex !important;
    gap: 15px !important;
    flex-wrap: wrap !important;
    flex-direction: column !important;
    width: 100% !important;
    align-items: stretch !important;
}

.year-filter {
    display: flex;
    align-items: center;
    gap: 15px;
    flex-wrap: wrap;
    background: rgba(224, 236, 206, 0.8) !important;
    border-radius: 12px !important;
    padding: 15px !important;
    border: 2px solid #689f38 !important;
    width: 100% !important;
    margin: 0 !important;
}

.filter-label {
    font-weight: 600;
    color: #2d3748;
    font-size: 1rem;
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.filter-label i {
    color: #689f38;
}

.year-input-container {
    flex: 1;
    min-width: 200px;
    max-width: 400px;
    display: flex;
    gap: 15px;
    align-items: center;
}

.year-input-group {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.year-input-group label {
    font-size: 0.8rem;
    color: #718096;
    font-weight: 500;
}

.year-input {
    width: 80px;
    padding: 8px 12px;
    border: 1px solid #e2e8f0;
    border-radius: 6px;
    font-size: 0.9rem;
    color: #2d3748;
    background: white;
    outline: none;
    transition: all 0.3s ease;
}

.year-input:focus {
    border-color: #689f38;
    box-shadow: 0 0 0 2px rgba(104, 159, 56, 0.2);
}

.year-input::-webkit-inner-spin-button,
.year-input::-webkit-outer-spin-button {
    opacity: 1;
}

.dual-slider {
    position: relative;
    margin-bottom: 8px;
}

.year-slider {
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: transparent;
    outline: none;
    -webkit-appearance: none;
    appearance: none;
    position: absolute;
    top: 0;
    left: 0;
    pointer-events: none;
}

.year-slider-min {
    z-index: 2;
    pointer-events: auto;
}

.year-slider-max {
    z-index: 1;
    pointer-events: auto;
}

.dual-slider::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 6px;
    background: #e2e8f0;
    border-radius: 3px;
    z-index: 0;
}

.dual-slider::after {
    content: '';
    position: absolute;
    top: 0;
    left: var(--track-left, 0%);
    width: var(--track-width, 100%);
    height: 6px;
    background: #689f38;
    border-radius: 3px;
    z-index: 0;
    transition: all 0.3s ease;
}

.year-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: #689f38;
    cursor: pointer;
    box-shadow: 0 2px 6px rgba(104, 159, 56, 0.3);
    transition: all 0.3s ease;
}

.year-slider::-webkit-slider-thumb:hover {
    transform: scale(1.1);
    box-shadow: 0 4px 12px rgba(104, 159, 56, 0.4);
}

.year-slider::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: #689f38;
    cursor: pointer;
    border: none;
    box-shadow: 0 2px 6px rgba(104, 159, 56, 0.3);
    transition: all 0.3s ease;
}

.year-slider::-moz-range-thumb:hover {
    transform: scale(1.1);
    box-shadow: 0 4px 12px rgba(104, 159, 56, 0.4);
}

.year-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    color: #718096;
    font-weight: 500;
}

.clear-year-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    background: #d32f2f;
    border: none;
    border-radius: 6px;
    color: white;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 14px;
    margin-left: auto;
}

.clear-year-btn:hover {
    background-color: #b71c1c;
    transform: translateY(-1px);
}

/* Conference filter */
.conference-filter {
    margin-top: 0 !important;
    padding: 15px !important;
    background: rgba(224, 236, 206, 0.6) !important;
    border-radius: 12px !important;
    border: 2px solid #8bc34a !important;
    width: 100% !important;
    position: relative !important;
}

.conference-select-container {
    margin-top: 20px;
    position: relative;
}

.conference-hint {
    font-size: 0.9rem;
    color: #718096;
    margin-left: 8px;
    font-weight: normal;
}

.conference-select {
    width: 100%;
    min-height: 120px;
    padding: 12px;
    border: 2px solid #e2e8f0;
    border-radius: 8px;
    background: white;
    font-size: 14px;
    line-height: 1.5;
    resize: vertical;
    transition: all 0.3s ease;
    cursor: pointer;
}



.conference-select:focus {
    outline: none;
    border-color: #689f38;
    box-shadow: 0 0 0 3px rgba(104, 159, 56, 0.1);
}

.conference-select option {
    padding: 8px 12px;
    margin: 2px 0;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.conference-select option:hover {
    background-color: #f7fafc;
}

.conference-select option:checked {
    background-color: #689f38;
    color: white;
}

.selected-conferences {
    margin-top: 8px;
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    min-height: 16px;
}

.conference-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 8px;
    background: #689f38;
    color: white;
    border-radius: 16px;
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.conference-tag:hover {
    background: #558b2f;
    transform: translateY(-1px);
}

.conference-tag .remove-tag {
    background: none;
    border: none;
    color: white;
    cursor: pointer;
    font-size: 10px;
    padding: 0;
    width: 16px;
    height: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: background-color 0.2s ease;
}

.conference-tag .remove-tag:hover {
    background: rgba(255, 255, 255, 0.2);
}

.clear-conference-btn {
    position: absolute !important;
    top: 20px !important;
    right: 15px !important;
    padding: 8px 16px !important;
    background: #d32f2f;
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 6px;
}

.clear-conference-btn:hover {
    background-color: #b71c1c;
    transform: translateY(-1px);
}

/* Abstract filter */
.abstract-filter {
    margin-top: 0 !important;
    padding: 15px !important;
    background: rgba(224, 236, 206, 0.4) !important;
    border-radius: 12px !important;
    border: 2px solid #4caf50 !important;
    width: 100% !important;
    position: relative !important;
}

/* Starred filter */
.starred-filter {
    margin: 0 !important;
    padding: 15px !important;
    background: rgba(255, 193, 7, 0.2) !important;
    border-radius: 12px !important;
    border: 2px solid #ffc107 !important;
    width: 100% !important;
    position: relative !important;
}

.starred-filter-container {
    margin-top: 10px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.abstract-filter-container {
    margin-top: 10px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    font-weight: 500;
    color: #2d3748;
    font-size: 1rem;
    position: relative;
    padding: 4px 0;
    flex-wrap: wrap;
}

.checkbox-label input[type="checkbox"] {
    position: absolute;
    opacity: 0;
    cursor: pointer;
    height: 0;
    width: 0;
}

.checkmark {
    height: 20px;
    width: 20px;
    background-color: white;
    border: 2px solid #e2e8f0;
    border-radius: 4px;
    position: relative;
    transition: all 0.3s ease;
    flex-shrink: 0;
}

.checkbox-label:hover input ~ .checkmark {
    border-color: #689f38;
    background-color: #f7fafc;
}

.checkbox-label input:checked ~ .checkmark {
    background-color: #689f38;
    border-color: #689f38;
}

.checkmark:after {
    content: "";
    position: absolute;
    display: none;
    left: 6px;
    top: 2px;
    width: 5px;
    height: 10px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.checkbox-label input:checked ~ .checkmark:after {
    display: block;
}

.filter-info {
    font-size: 0.9rem;
    color: #718096;
    margin-left: 8px;
    font-weight: normal;
}

.filter-option {
    margin-bottom: 0px;
}

.filter-option:last-child {
    margin-bottom: 0;
}

/* Removed author-filter-info as it's now handled by .filter-info */

/* Pagination section */
.pagination-section {
    margin-bottom: 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.pagination-info {
    font-weight: 500;
    color: #4a5568;
    font-size: 0.95rem;
}

.pagination-controls {
    display: flex;
    align-items: center;
    gap: 10px;
}

.pagination-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    background: white;
    border: 2px solid #e2e8f0;
    border-radius: 25px;
    color: #4a5568;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.9rem;
}

.pagination-btn:hover:not(:disabled) {
    border-color: #689f38;
    color: #689f38;
    transform: translateY(-1px);
}

.pagination-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.page-numbers {
    display: flex;
    align-items: center;
    gap: 5px;
}

.page-number {
    width: 40px;
    height: 40px;
    border: 2px solid #e2e8f0;
    background: white;
    border-radius: 50%;
    color: #4a5568;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.page-number:hover {
    border-color: #689f38;
    color: #689f38;
}

.page-number.active {
    background: #689f38;
    border-color: #689f38;
    color: white;
    box-shadow: 0 2px 10px rgba(104, 159, 56, 0.3);
}

.page-ellipsis {
    color: #a0aec0;
    font-weight: 500;
    padding: 0 5px;
}

/* Page input styles */
.page-input-container {
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 0 10px;
}

.page-input-label {
    font-size: 0.9rem;
    color: #4a5568;
    font-weight: 500;
    white-space: nowrap;
}

.page-input {
    width: 60px;
    padding: 8px 10px;
    border: 2px solid #e2e8f0;
    border-radius: 6px;
    font-size: 0.9rem;
    color: #2d3748;
    background: white;
    outline: none;
    transition: all 0.3s ease;
    text-align: center;
}

.page-input:focus {
    border-color: #689f38;
    box-shadow: 0 0 0 2px rgba(104, 159, 56, 0.2);
}

.page-input::-webkit-inner-spin-button,
.page-input::-webkit-outer-spin-button {
    opacity: 1;
}

.page-go-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 8px 12px;
    background: #689f38;
    border: none;
    border-radius: 6px;
    color: white;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.3s ease;
    min-width: 36px;
    height: 36px;
}

.page-go-btn:hover {
    background: #558b2f;
    transform: translateY(-1px);
}

.page-go-btn:disabled {
    background: #a0aec0;
    cursor: not-allowed;
    transform: none;
}

/* Papers container */
.papers-container {
    position: relative;
}

.papers-list {
    display: grid;
    gap: 20px;
}

/* Paper card styles */
.paper-card {
    background: white;
    border-radius: 15px;
    padding: 25px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    cursor: pointer;
    border: 2px solid transparent;
}

.paper-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
    border-color: #689f38;
}

.paper-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 15px;
    margin-bottom: 15px;
}

.paper-title {
    font-size: 1.3rem;
    font-weight: 600;
    color: #2d3748;
    margin-bottom: 10px;
    flex: 1;
    line-height: 1.4;
}

.star-button {
    background: none;
    border: none;
    color: #cbd5e0;
    font-size: 1.2rem;
    cursor: pointer;
    padding: 8px;
    border-radius: 50%;
    transition: all 0.3s ease;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    min-height: 40px;
}

.star-button:hover {
    background: rgba(104, 159, 56, 0.1);
    color: #689f38;
    transform: scale(1.1);
}

.star-button.starred {
    color: #f6ad55;
}

.star-button.starred:hover {
    background: rgba(246, 173, 85, 0.1);
    color: #ed8936;
}

.find-paper-btn {
    background: none;
    border: none;
    color: #4a90e2;
    font-size: 1.2rem;
    cursor: pointer;
    padding: 8px;
    border-radius: 50%;
    transition: all 0.3s ease;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    min-height: 40px;
}

.find-paper-btn:hover {
    background: rgba(74, 144, 226, 0.1);
    color: #357abd;
    transform: scale(1.1);
}

.paper-authors {
    color: #718096;
    font-weight: 500;
    margin-bottom: 15px;
    font-style: italic;
}

.paper-abstract {
    color: #4a5568;
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 15px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.paper-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
    color: #a0aec0;
}

.paper-year {
    background: #f7fafc;
    padding: 4px 12px;
    border-radius: 15px;
    font-weight: 500;
}

.paper-conference {
    background: #689f38;
    color: white;
    padding: 4px 12px;
    border-radius: 15px;
    font-weight: 500;
    font-size: 0.8rem;
}

.paper-no-abstract-badge {
    background: #ff9800;
    color: white;
    padding: 4px 8px;
    border-radius: 12px;
    font-weight: 500;
    font-size: 0.7rem;
}

.paper-card.no-abstract {
    border-left: 4px solid #ff9800;
    background: rgba(255, 152, 0, 0.05);
}

.paper-card.no-abstract .paper-abstract {
    color: #ff9800;
    /* font-style: italic; */
}

.paper-card.no-author {
    border-right: 4px solid #e91e63;
    background: rgba(233, 30, 99, 0.05);
}

.paper-card.no-author .paper-authors {
    color: #e91e63;
    font-style: italic;
}


/* Loading indicator */
.loading {
    text-align: center;
    padding: 60px 20px;
    color: #718096;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid #e2e8f0;
    border-top: 4px solid #689f38;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* No results */
.no-results {
    text-align: center;
    padding: 60px 20px;
    color: #718096;
}

.no-results i {
    font-size: 3rem;
    color: #a0aec0;
    margin-bottom: 20px;
}

.no-results h3 {
    font-size: 1.5rem;
    margin-bottom: 10px;
    color: #4a5568;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
}

.modal-content {
    background-color: white;
    margin: 5% auto;
    padding: 0;
    border-radius: 20px;
    width: 90%;
    max-width: 800px;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding: 25px 30px 20px 30px;
    border-bottom: 2px solid #e2e8f0;
    background: #f8fafc;
    border-radius: 20px 20px 0 0;
}

.modal-title-container {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    flex: 1;
    margin-right: 15px;
    justify-content: space-between;
}

.modal-header h2 {
    font-size: 1.8rem;
    font-weight: 600;
    color: #2d3748;
    margin: 0;
    line-height: 1.3;
    flex: 1;
}

.close-btn {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: #718096;
    cursor: pointer;
    padding: 8px;
    border-radius: 50%;
    transition: all 0.3s ease;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    min-height: 40px;
}

.close-btn:hover {
    background: rgba(220, 53, 69, 0.1);
    color: #dc3545;
    transform: scale(1.1);
}

.modal-body {
    padding: 30px;
    max-height: calc(80vh - 120px); /* Account for header height */
    overflow-y: auto;
}

.paper-details {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.detail-section h3 {
    font-size: 1.1rem;
    color: #2d3748;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.detail-section h3 i {
    color: #689f38;
    width: 20px;
}

.detail-section p {
    color: #4a5568;
    line-height: 1.6;
}

/* Notification */
.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    background: #689f38;
    color: white;
    padding: 15px 20px;
    border-radius: 10px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
    z-index: 1001;
    max-width: 400px;
    animation: slideInRight 0.3s ease;
}

.notification-content {
    display: flex;
    align-items: center;
    gap: 10px;
}

.notification-content i {
    font-size: 1.2rem;
}

.notification-close {
    background: none;
    border: none;
    color: white;
    cursor: pointer;
    padding: 5px;
    border-radius: 50%;
    transition: background 0.2s ease;
    margin-left: auto;
}

.notification-close:hover {
    background: rgba(255, 255, 255, 0.2);
}

@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* Export section */
.export-section {
    margin-bottom: 20px;
    padding: 15px;
    background: linear-gradient(135deg, #f1f8e9 0%, #e8f5e8 100%);
    border-radius: 12px;
    border: 1px solid #c8e6c9;
}

.export-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 15px;
}

.export-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: #2d3748;
    display: flex;
    align-items: center;
    gap: 8px;
    white-space: nowrap;
}

.export-title i {
    color: #689f38;
}

.export-buttons {
    display: flex;
    gap: 10px;
    justify-content: flex-end;
    flex-wrap: nowrap;
    flex: 1;
}

.export-btn {
    padding: 8px 16px;
    border: none;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 6px;
    text-decoration: none;
    color: white;
}

.save-btn {
    background: linear-gradient(135deg, #4caf50 0%, #66bb6a 100%);
    box-shadow: 0 3px 10px rgba(76, 175, 80, 0.3);
}

.save-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 15px rgba(76, 175, 80, 0.4);
}

.load-btn {
    background: linear-gradient(135deg, #8bc34a 0%, #9ccc65 100%);
    box-shadow: 0 3px 10px rgba(139, 195, 74, 0.3);
}

.load-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 15px rgba(139, 195, 74, 0.4);
}

.export-bib-btn {
    background: linear-gradient(135deg, #689f38 0%, #7cb342 100%);
    box-shadow: 0 3px 10px rgba(104, 159, 56, 0.3);
}

.export-bib-btn:hover {
    background: #689f38;
    transform: translateY(-2px);
}

.export-starred-btn {
    background: linear-gradient(135deg, #f6ad55 0%, #ed8936 100%);
    color: white;
}

.export-starred-btn:hover {
    background: linear-gradient(135deg, #ed8936 0%, #dd6b20 100%);
    transform: translateY(-2px);
}

.export-info {
    margin-top: 20px;
    padding: 15px;
    background: rgba(104, 159, 56, 0.1);
    border-radius: 10px;
    border: 1px solid rgba(104, 159, 56, 0.3);
}

.export-info i {
    color: #689f38;
    margin-right: 4px;
}

/* Enhanced notification styles */
.notification-success {
    border-left-color: #28a745;
}

.notification-error {
    border-left-color: #dc3545;
}

.notification-warning {
    border-left-color: #ffc107;
}

.notification-info {
    border-left-color: #17a2b8;
}

.notification-success .notification-content i {
    color: #28a745;
}

.notification-error .notification-content i {
    color: #dc3545;
}

.notification-warning .notification-content i {
    color: #ffc107;
}

.notification-info .notification-content i {
    color: #17a2b8;
}

/* Footer */
.footer {
    text-align: center;
    padding: 20px;
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.9rem;
}

/* Responsive design */
@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }
    
    .header-content {
        padding: 30px 15px;
    }
    
    .title {
        font-size: 2rem;
        flex-direction: column;
        gap: 10px;
    }
    
    .main-content {
        padding: 20px;
        border-radius: 15px;
    }
    
    .search-section {
        flex-direction: column;
        gap: 15px;
    }
    
    .search-container {
        min-width: auto;
        max-width: none;
    }
    
    .search-stats {
        margin-bottom: 12px;
        font-size: 0.85rem;
        min-height: 18px;
    }
    
    .search-input {
        padding: 15px 45px 15px 45px;
        font-size: 0.95rem;
    }
    
    .add-keyword-btn {
        right: 45px;
        width: 28px;
        height: 28px;
        padding: 6px;
        z-index: 2;
    }
    
    .clear-btn {
        z-index: 3;
    }
    
    .search-keywords-container {
        margin-top: 8px;
        gap: 6px;
    }
    
    .search-keyword-tag {
        padding: 4px 10px;
        font-size: 11px;
    }
    
    .remove-keywords-container {
        margin-top: 8px;
        gap: 6px;
    }
    
    .remove-keyword-tag {
        padding: 4px 10px;
        font-size: 11px;
    }
    
    .search-field-select {
        font-size: 0.85rem;
        padding: 7px 10px;
        margin-right: 8px;
    }
    
        .filters-section {
        gap: 15px;
    }

    .year-filter {
        flex-direction: column;
        align-items: stretch;
        gap: 15px;
    }

    .year-input-container {
        min-width: auto;
        max-width: none;
        flex-direction: column;
        gap: 10px;
    }
    
    .year-input-group {
        flex-direction: row;
        align-items: center;
        gap: 10px;
    }
    
    .year-input {
        width: 70px;
    }
    
    .conference-filter {
        margin-top: 0;
        padding: 15px;
    }
    
    .conference-select {
        min-height: 100px;
        font-size: 13px;
    }
    
    .conference-hint {
        font-size: 0.85rem;
    }
    
    .abstract-filter {
        padding: 15px;
    }
    
    .starred-filter {
        padding: 15px;
    }
    
    .checkbox-label {
        font-size: 0.9rem;
    }
    
    .filter-info {
        font-size: 0.85rem;
        margin-left: 8px;
    }
    
    .export-section {
        padding: 12px;
        margin-bottom: 15px;
    }
    
    .export-container {
        flex-direction: column;
        align-items: stretch;
        gap: 10px;
    }
    
    .export-title {
        font-size: 1rem;
        justify-content: center;
    }
    
    .export-buttons {
        flex-direction: column;
        align-items: center;
        gap: 8px;
        justify-content: center;
    }
    
    .export-btn {
        width: 100%;
        max-width: 200px;
        justify-content: center;
        padding: 10px 14px;
    }

    .pagination-section {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .pagination-controls {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .page-input-container {
        margin: 10px 0;
        justify-content: center;
    }
    
    .page-input {
        width: 50px;
        padding: 6px 8px;
        font-size: 0.85rem;
    }
    
    .page-go-btn {
        padding: 6px 10px;
        font-size: 0.85rem;
        min-width: 32px;
        height: 32px;
    }
    
    .paper-card {
        padding: 20px;
        margin-bottom: 20px;
    }

    .paper-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }

    .paper-title {
        font-size: 1.1rem;
        margin-bottom: 8px;
    }

    .star-button {
        align-self: flex-end;
        font-size: 1rem;
        min-width: 35px;
        min-height: 35px;
    }

    .find-paper-btn {
        font-size: 1rem;
        min-width: 35px;
        min-height: 35px;
    }

    .modal-content {
        margin: 10px;
        max-height: 90vh;
    }

    .modal-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
        padding: 20px;
    }

    .modal-title-container {
        flex-direction: row;
        align-items: flex-start;
        gap: 10px;
        width: 100%;
        margin-right: 0;
    }

    .modal-body {
        padding: 20px;
        max-height: calc(90vh - 140px);
    }

    .modal-header h2 {
        font-size: 1.4rem;
    }
}

@media (max-width: 480px) {
    .title {
        font-size: 1.8rem;
    }
    
    .subtitle {
        font-size: 1rem;
    }
    
    .search-section {
        gap: 10px;
    }
    
    .search-stats {
        margin-bottom: 10px;
        font-size: 0.8rem;
        min-height: 16px;
    }
    
    .search-input {
        padding: 12px 40px 12px 40px;
        font-size: 0.9rem;
    }
    
    .search-field-select {
        font-size: 0.8rem;
        padding: 6px 8px;
        margin-right: 6px;
    }
    
    .year-filter {
        gap: 10px;
    }
    
    .filter-label {
        font-size: 0.9rem;
        flex-wrap: wrap;
        gap: 4px;
    }
    
    .clear-year-btn {
        align-self: center;
    }
    
    .conference-filter {
        padding: 10px;
    }
    
    .conference-select {
        min-height: 80px;
        font-size: 12px;
    }
    
    .conference-hint {
        font-size: 0.8rem;
    }
    
    .clear-conference-btn {
        align-self: center;
    }
    
    .abstract-filter {
        padding: 10px;
    }
    
    .starred-filter {
        padding: 10px;
    }
    
    .checkbox-label {
        font-size: 0.85rem;
    }
    
    .filter-info {
        font-size: 0.8rem;
        margin-left: 6px;
    }
    
    .export-section {
        padding: 10px;
        margin-bottom: 12px;
    }
    
    .export-container {
        gap: 8px;
    }
    
    .export-title {
        font-size: 0.9rem;
        justify-content: center;
    }
    
    .export-btn {
        padding: 12px 16px;
        font-size: 0.9rem;
        margin-bottom: 10px;
        width: 100%;
    }
    
    .paper-card {
        padding: 15px;
    }
    
    .paper-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
    
    .paper-no-abstract-badge {
        font-size: 0.65rem;
        padding: 3px 6px;
    }
    
    .modal-header {
        padding: 15px;
    }
    
    .modal-title-container {
        gap: 8px;
    }
    
    .modal-header h2 {
        font-size: 1.2rem;
    }
    
    .modal-body {
        padding: 15px;
    }

    .find-paper-btn {
        font-size: 0.9rem;
        min-width: 32px;
        min-height: 32px;
    }
}