/* CSS Variables */
:root {
    --primary-color: #4a90e2;
    --primary-dark: #357abd;
    --secondary-color: #f0f2f5;
    --text-primary: #333;
    --text-secondary: #666;
    --white: #ffffff;
    --shadow: 0 2px 4px rgba(0,0,0,0.1);
    --transition: all 0.3s ease;

    /* Platform-specific colors */
    --twitter-color: #1DA1F2;
    --facebook-color: #4267B2;
    --reddit-color: #FF4500;
    --wikipedia-color: #898989;
    --mendeley-color: #9D1620;
    --blog-color: #2ECC71;
    --news-color: #E74C3C;
    --video-color: #FF0000;
    --qa-color: #7B68EE;
    --patent-color: #FFA500;
    --policy-color: #008080;
    --peer-review-color: #8E44AD;
    --altmetric-color: #3498DB;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    background: linear-gradient(135deg, #f6f7ff 0%, #f0f4ff 100%);
    color: var(--text-primary);
    min-height: 100vh;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

/* Header Styles */
header {
    text-align: center;
    margin-bottom: 40px;
    padding: 20px;
    background: var(--white);
    border-radius: 15px;
    box-shadow: var(--shadow);
}

header h1 {
    color: var(--primary-color);
    margin-bottom: 10px;
    font-size: 2.5em;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

header h1 i {
    font-size: 0.8em;
    animation: pulse 2s infinite;
}

header p {
    color: var(--text-secondary);
    font-size: 1.1em;
}

/* Search Box Styles */
.search-box {
    display: flex;
    gap: 10px;
    margin-bottom: 30px;
    justify-content: center;
    padding: 20px;
    background: var(--white);
    border-radius: 15px;
    box-shadow: var(--shadow);
}

input[type="text"] {
    padding: 15px;
    width: 500px;
    border: 2px solid #ddd;
    border-radius: 10px;
    font-size: 16px;
    transition: var(--transition);
}

input[type="text"]:focus {
    border-color: var(--primary-color);
    outline: none;
    box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.1);
}

button {
    padding: 15px 30px;
    background-color: var(--primary-color);
    color: var(--white);
    border: none;
    border-radius: 10px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
}

button:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
}

button:disabled {
    background-color: #cccccc;
    cursor: not-allowed;
    transform: none;
}

/* Loading Styles */
.loading {
    display: none;
    text-align: center;
    margin: 20px 0;
}

.spinner {
    display: inline-block;
    width: 40px;
    height: 40px;
    border: 4px solid rgba(74, 144, 226, 0.1);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* Error Message Styles */
.error {
    display: none;
    color: var(--error-color);
    text-align: center;
    margin: 20px 0;
    padding: 15px;
    background-color: #fde8e8;
    border-radius: 10px;
    border-left: 4px solid var(--error-color);
}

/* Results Section */
.results {
    display: none;
}

/* Paper Info Styles */
.paper-info {
    background: var(--white);
    padding: 25px;
    border-radius: 15px;
    margin-bottom: 30px;
    box-shadow: var(--shadow);
}

.paper-title {
    font-size: 1.5em;
    margin-bottom: 15px;
    color: var(--text-primary);
    font-weight: 600;
    line-height: 1.4;
}

.paper-details {
    color: var(--text-secondary);
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
}

.paper-details p {
    display: flex;
    align-items: center;
    gap: 8px;
}

.paper-details i {
    color: var(--primary-color);
}

/* Metrics Grid Styles */
.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.metric-card {
    background: var(--white);
    padding: 20px;
    border-radius: 15px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.metric-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--primary-color);
}

.metric-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

/* Platform-specific styles */
.metric-card[data-platform="twitter"] {
    background: linear-gradient(to bottom right, var(--white) 0%, #e8f5fd 100%);
}
.metric-card[data-platform="twitter"]::before {
    background: var(--twitter-color);
}
.metric-card[data-platform="twitter"] i {
    color: var(--twitter-color);
}

.metric-card[data-platform="facebook"] {
    background: linear-gradient(to bottom right, var(--white) 0%, #e9ebee 100%);
}
.metric-card[data-platform="facebook"]::before {
    background: var(--facebook-color);
}
.metric-card[data-platform="facebook"] i {
    color: var(--facebook-color);
}

.metric-card[data-platform="reddit"] {
    background: linear-gradient(to bottom right, var(--white) 0%, #fff7f5 100%);
}
.metric-card[data-platform="reddit"]::before {
    background: var(--reddit-color);
}
.metric-card[data-platform="reddit"] i {
    color: var(--reddit-color);
}

.metric-card[data-platform="wikipedia"] {
    background: linear-gradient(to bottom right, var(--white) 0%, #f5f5f5 100%);
}
.metric-card[data-platform="wikipedia"]::before {
    background: var(--wikipedia-color);
}
.metric-card[data-platform="wikipedia"] i {
    color: var(--wikipedia-color);
}

.metric-card[data-platform="mendeley"] {
    background: linear-gradient(to bottom right, var(--white) 0%, #fff5f5 100%);
}
.metric-card[data-platform="mendeley"]::before {
    background: var(--mendeley-color);
}
.metric-card[data-platform="mendeley"] i {
    color: var(--mendeley-color);
}

.metric-card[data-platform="blog"] {
    background: linear-gradient(to bottom right, var(--white) 0%, #f0fff4 100%);
}
.metric-card[data-platform="blog"]::before {
    background: var(--blog-color);
}
.metric-card[data-platform="blog"] i {
    color: var(--blog-color);
}

.metric-card[data-platform="news"] {
    background: linear-gradient(to bottom right, var(--white) 0%, #fff5f5 100%);
}
.metric-card[data-platform="news"]::before {
    background: var(--news-color);
}
.metric-card[data-platform="news"] i {
    color: var(--news-color);
}

.metric-card[data-platform="video"] {
    background: linear-gradient(to bottom right, var(--white) 0%, #fff5f5 100%);
}
.metric-card[data-platform="video"]::before {
    background: var(--video-color);
}
.metric-card[data-platform="video"] i {
    color: var(--video-color);
}

.metric-card[data-platform="qa"] {
    background: linear-gradient(to bottom right, var(--white) 0%, #f5f0ff 100%);
}
.metric-card[data-platform="qa"]::before {
    background: var(--qa-color);
}
.metric-card[data-platform="qa"] i {
    color: var(--qa-color);
}

.metric-card[data-platform="patent"] {
    background: linear-gradient(to bottom right, var(--white) 0%, #fff9f0 100%);
}
.metric-card[data-platform="patent"]::before {
    background: var(--patent-color);
}
.metric-card[data-platform="patent"] i {
    color: var(--patent-color);
}

.metric-card[data-platform="policy"] {
    background: linear-gradient(to bottom right, var(--white) 0%, #f0ffff 100%);
}
.metric-card[data-platform="policy"]::before {
    background: var(--policy-color);
}
.metric-card[data-platform="policy"] i {
    color: var(--policy-color);
}

.metric-card[data-platform="peer-review"] {
    background: linear-gradient(to bottom right, var(--white) 0%, #f5f0ff 100%);
}
.metric-card[data-platform="peer-review"]::before {
    background: var(--peer-review-color);
}
.metric-card[data-platform="peer-review"] i {
    color: var(--peer-review-color);
}

.metric-card[data-platform="altmetric"] {
    background: linear-gradient(to bottom right, var(--white) 0%, #ebf5fb 100%);
}
.metric-card[data-platform="altmetric"]::before {
    background: var(--altmetric-color);
}
.metric-card[data-platform="altmetric"] i {
    color: var(--altmetric-color);
}

.metric-card i {
    font-size: 24px;
    margin-bottom: 10px;
}

.metric-value {
    font-size: 28px;
    font-weight: bold;
    color: var(--text-primary);
    margin: 10px 0;
}

.metric-label {
    color: var(--text-secondary);
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Chart Styles */
.chart-container {
    background: var(--white);
    padding: 25px;
    border-radius: 15px;
    box-shadow: var(--shadow);
    margin-bottom: 30px;
    height: 500px;
}

/* Footer Styles */
footer {
    text-align: center;
    padding: 20px;
    color: var(--text-secondary);
    margin-top: 40px;
}

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

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.1); }
    100% { transform: scale(1); }
}

/* Responsive Design */
@media (max-width: 1200px) {
    .metrics-grid {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    }
}

@media (max-width: 768px) {
    .container {
        padding: 10px;
    }

    header h1 {
        font-size: 2em;
    }

    .search-box {
        flex-direction: column;
    }

    input[type="text"] {
        width: 100%;
    }

    button {
        width: 100%;
        justify-content: center;
    }

    .metrics-grid {
        grid-template-columns: 1fr;
    }

    .chart-container {
        height: 400px;
    }

    .paper-details {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    header h1 {
        font-size: 1.8em;
        flex-direction: column;
    }

    .metric-card {
        padding: 15px;
    }

    .metric-value {
        font-size: 24px;
    }

    .chart-container {
        height: 300px;
        padding: 15px;
    }
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    :root {
        --primary-color: #60a5fa;
        --primary-dark: #3b82f6;
        --text-primary: #e5e7eb;
        --text-secondary: #9ca3af;
        --white: #1f2937;
    }

    body {
        background: linear-gradient(135deg, #111827 0%, #1f2937 100%);
    }

    input[type="text"] {
        background-color: #374151;
        border-color: #4b5563;
        color: var(--text-primary);
    }

    .error {
        background-color: rgba(231, 76, 60, 0.1);
    }
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--secondary-color);
}

::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
}
/* Add these styles to your existing CSS */

/* Modern Footer Styles */
.footer {
    background: linear-gradient(to right, #1a1c2e, #2a2d4a);
    color: #fff;
    padding: 60px 0 20px;
    margin-top: 80px;
    border-radius: 30px 30px 0 0;
    position: relative;
    overflow: hidden;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(to right, 
        rgba(255,255,255,0),
        rgba(255,255,255,0.2),
        rgba(255,255,255,0));
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
}

.footer-section {
    padding: 20px;
}

.footer-section h4 {
    color: #fff;
    font-size: 18px;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 10px;
}

.footer-section h4::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 40px;
    height: 2px;
    background: var(--primary-color);
}

.footer-section p {
    color: #b4b4b4;
    line-height: 1.6;
}

.footer-section ul {
    list-style: none;
    padding: 0;
}

.footer-section ul li {
    margin-bottom: 12px;
}

.footer-section ul li a {
    color: #b4b4b4;
    text-decoration: none;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
}

.footer-section ul li a:hover {
    color: var(--primary-color);
    transform: translateX(5px);
}

.social-links {
    display: flex;
    gap: 15px;
}

.social-link {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255,255,255,0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    text-decoration: none;
    transition: var(--transition);
}

.social-link:hover {
    background: var(--primary-color);
    transform: translateY(-3px);
}

.newsletter-form {
    display: flex;
    gap: 10px;
    margin-top: 15px;
}

.newsletter-form input {
    flex: 1;
    padding: 12px;
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 8px;
    background: rgba(255,255,255,0.05);
    color: #fff;
}

.newsletter-form input::placeholder {
    color: #b4b4b4;
}

.newsletter-btn {
    padding: 12px 20px;
    background: var(--primary-color);
    color: #fff;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
}

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

.footer-bottom {
    max-width: 1200px;
    margin: 40px auto 0;
    padding: 20px;
    border-top: 1px solid rgba(255,255,255,0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.footer-legal {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    align-items: center;
}

.footer-legal p {
    color: #b4b4b4;
    margin: 0;
}

.legal-links {
    display: flex;
    gap: 20px;
}

.legal-links a {
    color: #b4b4b4;
    text-decoration: none;
    font-size: 14px;
    transition: var(--transition);
}

.legal-links a:hover {
    color: var(--primary-color);
}

.powered-by {
    display: flex;
    align-items: center;
    gap: 10px;
    color: #fbfbfb;
}

.powered-by img {
    height: 30px;
    opacity: 0.7;
    transition: var(--transition);
}

.powered-by img:hover {
    opacity: 1;
}

/* Responsive Footer */
@media (max-width: 768px) {
    .footer {
        padding: 40px 0 20px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .footer-section {
        padding: 10px 20px;
    }

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

    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }

    .footer-legal {
        flex-direction: column;
        align-items: center;
    }

    .legal-links {
        justify-content: center;
    }
}

/* Dark Mode Support for Footer */
@media (prefers-color-scheme: dark) {
    .footer {
        background: linear-gradient(to right, #0f1219, #1a1f2e);
    }
}