:root {
    --leetcode-blue: #F0F4F8;
    --leetcode-dark: #3B5998;
    --github-gray: #F6F8FA;
    --github-dark: #333333;
    --codeforces-orange: #FAFAFA;
    --codeforces-dark: #FF9900;
    --card-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    --border-radius: 12px;
    --transition: all 0.3s ease;
    --error-red: #e53935;
    --success-green: #43A047;
    --text-dark: #24292e;
    --text-light: #586069;
    --background: #f6f8fa;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--background);
    min-height: 100vh;
    padding: 20px 0;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 20px;
}

.header {
    text-align: center;
    margin-bottom: 30px;
    padding: 15px 0;
}

.highlight {
    color: var(--leetcode-dark);
    font-weight: bold;
}

.subtitle {
    color: var(--text-light);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 10px auto 0;
}

.search-form {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--card-shadow);
    padding: 25px;
    margin-bottom: 30px;
}

.input-group {
    display: flex;
    align-items: center;
    margin-bottom: 18px;
    border: 1px solid #e1e4e8;
    border-radius: 8px;
    overflow: hidden;
    transition: var(--transition);
}

.input-group:focus-within {
    box-shadow: 0 0 0 2px rgba(3, 102, 214, 0.3);
    border-color: #0366d6;
}

.platform-icon {
    width: 45px;
    height: 45px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 1.2rem;
}

.leetcode {
    background-color: var(--leetcode-blue);
    color: var(--leetcode-dark);
}

.github {
    background-color: var(--github-gray);
    color: var(--github-dark);
}

.codeforces {
    background-color: var(--codeforces-orange);
    color: var(--codeforces-dark);
}

input {
    flex: 1;
    padding: 12px 15px;
    border: none;
    font-size: 1rem;
    outline: none;
}

input::placeholder {
    color: var(--text-light);
}

.search-btn {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, #3B5998, #2D46B9);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.search-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(59, 89, 152, 0.3);
}

.search-btn:active {
    transform: translateY(0);
}

.search-icon {
    font-size: 1.2rem;
}

.spinner {
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s linear infinite;
}

.hidden {
    display: none !important;
}

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

.results-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 25px;
}

.profile-card {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--card-shadow);
    overflow: hidden;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    height: 100%;
}

.profile-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
}

.platform-header {
    padding: 15px 20px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.platform-icon-large {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    color: white;
    font-size: 1.1rem;
}

.leetcode-card .platform-header {
    background-color: var(--leetcode-blue);
    border-bottom: 1px solid rgba(59, 89, 152, 0.1);
}

.leetcode-card .platform-icon-large {
    background-color: var(--leetcode-dark);
}

.github-card .platform-header {
    background-color: var(--github-gray);
    border-bottom: 1px solid rgba(51, 51, 51, 0.1);
}

.github-card .platform-icon-large {
    background-color: var(--github-dark);
}

.codeforces-card .platform-header {
    background-color: var(--codeforces-orange);
    border-bottom: 1px solid rgba(255, 153, 0, 0.1);
}

.codeforces-card .platform-icon-large {
    background-color: var(--codeforces-dark);
}

.platform-title {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-dark);
}

.profile-body {
    padding: 20px;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.profile-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    margin-bottom: 15px;
    align-items: center;
}

.profile-pic {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid #f0f0f0;
}

.user-info {
    flex: 1;
}

.user-name {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 5px;
}

.username {
    color: var(--text-light);
    font-weight: 500;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    margin-bottom: 18px;
}

.stat-card {
    background: #f8f9fa;
    border-radius: 8px;
    padding: 12px;
    text-align: center;
}

.stat-value {
    font-size: 1.4rem;
    font-weight: 700;
    line-height: 1.2;
}

.stat-label {
    color: var(--text-light);
    font-size: 0.85rem;
    font-weight: 500;
}

.tags-container {
    margin: 12px 0;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tag {
    background: #f0f0f0;
    color: var(--text-dark);
    border-radius: 20px;
    padding: 5px 12px;
    font-size: 0.85rem;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.leetcode-card .tag {
    background: rgba(59, 89, 152, 0.1);
    color: var(--leetcode-dark);
}

.github-card .tag {
    background: rgba(51, 51, 51, 0.1);
    color: var(--github-dark);
}

.codeforces-card .tag {
    background: rgba(255, 153, 0, 0.1);
    color: var(--codeforces-dark);
}

.section-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin: 15px 0 8px;
    color: var(--text-dark);
    display: flex;
    align-items: center;
    gap: 8px;
}

.section-title::before {
    content: "";
    display: inline-block;
    width: 4px;
    height: 16px;
    border-radius: 2px;
}

.leetcode-card .section-title::before {
    background-color: var(--leetcode-dark);
}

.github-card .section-title::before {
    background-color: var(--github-dark);
}

.codeforces-card .section-title::before {
    background-color: var(--codeforces-dark);
}

.content-list {
    padding-left: 20px;
    margin: 8px 0;
}

.content-list li {
    margin-bottom: 6px;
}

.readme-preview, .summary-preview {
    background: #f8f9fa;
    border-radius: 8px;
    padding: 12px;
    font-size: 0.92rem;
    line-height: 1.5;
    max-height: 140px;
    overflow-y: auto;
    color: var(--text-dark);
}

.error-msg {
    background: #ffebee;
    color: var(--error-red);
    border-radius: 8px;
    padding: 15px;
    margin: 15px 0;
    border-left: 4px solid var(--error-red);
    display: flex;
    align-items: center;
    gap: 10px;
}

.error-icon {
    font-size: 1.5rem;
}

.no-results {
    text-align: center;
    padding: 30px 20px;
    color: var(--text-light);
}

.no-results-icon {
    font-size: 3rem;
    margin-bottom: 15px;
    opacity: 0.3;
}

/* Responsive design */
@media (max-width: 768px) {
    .results-container {
        grid-template-columns: 1fr;
    }
    
    .search-form {
        padding: 20px 15px;
    }
    
    .input-group {
        flex-direction: column;
        align-items: stretch;
        border-radius: 8px;
    }
    
    .platform-icon {
        width: 100%;
        height: 40px;
        border-bottom: 1px solid #e1e4e8;
    }
    
    input {
        border-radius: 0 0 8px 8px;
    }
}

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .header h1 {
        font-size: 1.8rem;
    }
    
    .subtitle {
        font-size: 1rem;
    }
}
/* Add to your existing style.css */

.ipu-card .platform-header {
    background-color: #e3f2fd;
    border-bottom: 1px solid rgba(74, 111, 165, 0.1);
}

.ipu-card .platform-icon-large {
    background-color: #4a6fa5;
    color: white;
}

.ipu-card .tag {
    background: rgba(74, 111, 165, 0.1);
    color: #4a6fa5;
}

.ipu-card .section-title::before {
    background-color: #4a6fa5;
}