/* ========================================
   CSS Variables & Theme Configuration
   ======================================== */

:root {
    /* Light Theme Colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f6f8fa;
    --bg-tertiary: #ffffff;
    --text-primary: #24292f;
    --text-secondary: #57606a;
    --text-tertiary: #6e7781;
    --accent: #0969da;
    --accent-hover: #0860ca;
    --border: #d0d7de;
    --border-light: #e5e9ed;
    --shadow: rgba(31, 35, 40, 0.04);
    --shadow-md: rgba(31, 35, 40, 0.08);
    --shadow-lg: rgba(31, 35, 40, 0.12);
    --success: #1a7f37;
    --error: #cf222e;
    --warning: #9a6700;
    
    /* Skeleton */
    --skeleton-base: #e1e4e8;
    --skeleton-shine: #f0f3f5;
    
    /* Language Colors */
    --lang-javascript: #f1e05a;
    --lang-typescript: #3178c6;
    --lang-python: #3572a5;
    --lang-java: #b07219;
    --lang-html: #e34c26;
    --lang-css: #563d7c;
    --lang-ruby: #701516;
    --lang-go: #00add8;
    --lang-rust: #dea584;
    
    /* Layout */
    --max-width: 1200px;
    --header-height: 70px;
    --border-radius: 12px;
    --border-radius-sm: 8px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #21262d;
    --text-primary: #c9d1d9;
    --text-secondary: #8b949e;
    --text-tertiary: #6e7681;
    --accent: #58a6ff;
    --accent-hover: #79b8ff;
    --border: #30363d;
    --border-light: #21262d;
    --shadow: rgba(1, 4, 9, 0.2);
    --shadow-md: rgba(1, 4, 9, 0.3);
    --shadow-lg: rgba(1, 4, 9, 0.4);
    --success: #2ea043;
    --error: #f85149;
    --warning: #d29922;
    
    --skeleton-base: #21262d;
    --skeleton-shine: #30363d;
}

/* ========================================
   Reset & Base Styles
   ======================================== */

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans', Helvetica, Arial, sans-serif;
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
    width: 100%;
}

/* ========================================
   Header
   ======================================== */

.header {
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
    height: var(--header-height);
    display: flex;
    align-items: center;
    box-shadow: 0 1px 3px var(--shadow);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo i {
    font-size: 32px;
    color: var(--text-primary);
}

.logo h1 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
}

.theme-toggle {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--border-radius-sm);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    color: var(--text-primary);
    font-size: 18px;
}

.theme-toggle:hover {
    background: var(--bg-tertiary);
    transform: scale(1.05);
}

.theme-toggle:active {
    transform: scale(0.95);
}

/* ========================================
   Main Content
   ======================================== */

.main {
    flex: 1;
    padding: 40px 0;
}

/* ========================================
   Search Section
   ======================================== */

.search-section {
    margin-bottom: 30px;
}

.search-wrapper {
    display: flex;
    gap: 12px;
    margin-bottom: 12px;
}

.search-input-group {
    flex: 1;
    position: relative;
    display: flex;
    align-items: center;
}

.search-icon {
    position: absolute;
    left: 16px;
    color: var(--text-tertiary);
    font-size: 18px;
    pointer-events: none;
}

.search-input {
    width: 100%;
    padding: 14px 50px 14px 48px;
    background: var(--bg-primary);
    border: 2px solid var(--border);
    border-radius: var(--border-radius);
    font-size: 16px;
    color: var(--text-primary);
    transition: var(--transition);
}

.search-input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(9, 105, 218, 0.1);
}

[data-theme="dark"] .search-input:focus {
    box-shadow: 0 0 0 3px rgba(88, 166, 255, 0.15);
}

.clear-btn {
    position: absolute;
    right: 12px;
    background: transparent;
    border: none;
    color: var(--text-tertiary);
    cursor: pointer;
    padding: 8px;
    border-radius: var(--border-radius-sm);
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.clear-btn:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.search-btn {
    padding: 14px 28px;
    background: var(--accent);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
    white-space: nowrap;
}

.search-btn:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(9, 105, 218, 0.3);
}

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

.search-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.rate-limit-info {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--border-radius-sm);
    font-size: 14px;
    color: var(--text-secondary);
}

.rate-limit-info i {
    color: var(--accent);
}

/* ========================================
   Recent Searches
   ======================================== */

.recent-searches {
    margin-bottom: 30px;
}

.section-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.recent-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.recent-chip {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 20px;
    cursor: pointer;
    transition: var(--transition);
    font-size: 14px;
}

.recent-chip:hover {
    background: var(--bg-tertiary);
    border-color: var(--accent);
    transform: translateY(-2px);
}

.recent-chip img {
    width: 24px;
    height: 24px;
    border-radius: 50%;
}

.recent-chip .remove-chip {
    background: transparent;
    border: none;
    color: var(--text-tertiary);
    cursor: pointer;
    padding: 0;
    margin-left: 4px;
    display: flex;
    align-items: center;
    transition: var(--transition);
}

.recent-chip .remove-chip:hover {
    color: var(--error);
}

/* ========================================
   Empty State
   ======================================== */

.empty-state {
    text-align: center;
    padding: 60px 20px;
    animation: fadeIn 0.5s ease;
}

.empty-state-icon {
    font-size: 80px;
    color: var(--text-tertiary);
    margin-bottom: 20px;
    opacity: 0.5;
}

.empty-state h2 {
    font-size: 28px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.empty-state p {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 30px;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

.empty-state-features {
    display: flex;
    justify-content: center;
    gap: 40px;
    flex-wrap: wrap;
}

.feature-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.feature-item i {
    font-size: 28px;
    color: var(--accent);
}

.feature-item span {
    font-size: 14px;
    color: var(--text-secondary);
}

/* ========================================
   Loading State (Skeleton)
   ======================================== */

.loading-container {
    animation: fadeIn 0.3s ease;
}

.profile-skeleton {
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--border-radius);
    padding: 30px;
}

.skeleton-header {
    display: flex;
    gap: 20px;
    margin-bottom: 20px;
}

.skeleton {
    background: linear-gradient(
        90deg,
        var(--skeleton-base) 25%,
        var(--skeleton-shine) 50%,
        var(--skeleton-base) 75%
    );
    background-size: 200% 100%;
    animation: loading 1.5s ease-in-out infinite;
    border-radius: var(--border-radius-sm);
}

@keyframes loading {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

.skeleton-avatar {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    flex-shrink: 0;
}

.skeleton-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 12px;
    justify-content: center;
}

.skeleton-text {
    height: 16px;
    margin-bottom: 12px;
}

.skeleton-title {
    height: 24px;
    width: 60%;
}

.skeleton-subtitle {
    height: 18px;
    width: 40%;
}

.stats-skeleton {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 16px;
    margin-top: 20px;
}

.skeleton-stat {
    height: 80px;
}

/* ========================================
   Error State
   ======================================== */

.error-container {
    animation: fadeIn 0.5s ease;
}

.error-content {
    text-align: center;
    padding: 60px 20px;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--border-radius);
}

.error-icon {
    font-size: 64px;
    color: var(--error);
    margin-bottom: 20px;
}

.error-content h2 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.error-content p {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 24px;
    max-width: 400px;
    margin-left: auto;
    margin-right: auto;
}

.retry-btn {
    padding: 12px 24px;
    background: var(--accent);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.retry-btn:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
}

/* ========================================
   Profile Container
   ======================================== */

.profile-container {
    animation: fadeIn 0.5s ease;
    display: grid;
    gap: 24px;
}

/* Profile Card */
.profile-card {
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--border-radius);
    padding: 30px;
    box-shadow: 0 1px 3px var(--shadow);
}

.profile-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 20px;
}

.user-avatar {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    border: 3px solid var(--border);
    object-fit: cover;
}

.profile-actions {
    display: flex;
    gap: 8px;
}

.action-btn {
    width: 36px;
    height: 36px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--border-radius-sm);
    color: var(--text-primary);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
}

.action-btn:hover {
    background: var(--bg-tertiary);
    border-color: var(--accent);
    color: var(--accent);
    transform: translateY(-2px);
}

.profile-info {
    margin-top: 20px;
}

.user-name {
    font-size: 26px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.user-username {
    font-size: 20px;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.user-bio {
    font-size: 16px;
    color: var(--text-primary);
    line-height: 1.6;
    margin-bottom: 20px;
}

.profile-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--text-secondary);
}

.meta-item i {
    color: var(--text-tertiary);
}

.meta-item a {
    color: var(--accent);
    text-decoration: none;
}

.meta-item a:hover {
    text-decoration: underline;
}

/* Stats Card */
.stats-card {
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--border-radius);
    padding: 24px;
    box-shadow: 0 1px 3px var(--shadow);
}

.card-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 20px;
}

.stat-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px;
    background: var(--bg-secondary);
    border-radius: var(--border-radius-sm);
    transition: var(--transition);
}

.stat-item:hover {
    background: var(--bg-tertiary);
    transform: translateY(-2px);
}

.stat-item i {
    font-size: 24px;
    color: var(--accent);
}

.stat-content {
    display: flex;
    flex-direction: column;
}

.stat-value {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1;
}

.stat-label {
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 4px;
}

/* Repositories Section */
.repos-section {
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--border-radius);
    padding: 24px;
    box-shadow: 0 1px 3px var(--shadow);
}

.repos-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 12px;
}

.repo-sort {
    padding: 8px 12px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--border-radius-sm);
    color: var(--text-primary);
    font-size: 14px;
    cursor: pointer;
    transition: var(--transition);
}

.repo-sort:hover {
    border-color: var(--accent);
}

.repo-sort:focus {
    outline: none;
    border-color: var(--accent);
}

.repos-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 16px;
}

.repo-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--border-radius-sm);
    padding: 20px;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    height: 100%;
}

.repo-card:hover {
    background: var(--bg-tertiary);
    border-color: var(--accent);
    transform: translateY(-4px);
    box-shadow: 0 4px 12px var(--shadow-md);
}

.repo-header {
    margin-bottom: 12px;
}

.repo-name {
    font-size: 16px;
    font-weight: 600;
    color: var(--accent);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 6px;
    margin-bottom: 8px;
}

.repo-name:hover {
    text-decoration: underline;
}

.repo-name i {
    font-size: 14px;
}

.repo-description {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.5;
    margin-bottom: 12px;
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.repo-footer {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
    font-size: 13px;
}

.repo-language {
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--text-secondary);
}

.language-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.repo-stat {
    display: flex;
    align-items: center;
    gap: 4px;
    color: var(--text-secondary);
}

.repo-stat i {
    font-size: 12px;
}

.no-repos {
    text-align: center;
    padding: 40px;
    color: var(--text-secondary);
}

.no-repos i {
    font-size: 48px;
    margin-bottom: 12px;
    opacity: 0.5;
}

/* ========================================
   Footer
   ======================================== */

.footer {
    background: var(--bg-primary);
    border-top: 1px solid var(--border);
    padding: 30px 0;
    margin-top: 60px;
    text-align: center;
}

.footer p {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 8px;
}

.footer i {
    color: var(--error);
}

.footer-links {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
}

.footer-links a {
    color: var(--accent);
    text-decoration: none;
}

.footer-links a:hover {
    text-decoration: underline;
}

/* ========================================
   Toast Notification
   ======================================== */

.toast {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background: var(--success);
    color: white;
    padding: 16px 24px;
    border-radius: var(--border-radius);
    box-shadow: 0 4px 12px var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 12px;
    z-index: 1000;
    animation: slideIn 0.3s ease;
}

.toast i {
    font-size: 20px;
}

@keyframes slideIn {
    from {
        transform: translateX(400px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* ========================================
   Utility Classes
   ======================================== */

.hidden {
    display: none !important;
}

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

/* ========================================
   Responsive Design
   ======================================== */

@media (max-width: 768px) {
    .logo h1 {
        font-size: 16px;
    }
    
    .search-wrapper {
        flex-direction: column;
    }
    
    .search-btn {
        width: 100%;
        justify-content: center;
    }
    
    .profile-header {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    
    .profile-actions {
        margin-top: 16px;
    }
    
    .user-avatar {
        width: 100px;
        height: 100px;
    }
    
    .repos-container {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .empty-state-features {
        gap: 20px;
    }
    
    .toast {
        right: 20px;
        left: 20px;
        bottom: 20px;
    }
}

@media (max-width: 480px) {
    .logo i {
        font-size: 24px;
    }
    
    .logo h1 {
        font-size: 14px;
    }
    
    .user-name {
        font-size: 22px;
    }
    
    .user-username {
        font-size: 16px;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .profile-card,
    .stats-card,
    .repos-section {
        padding: 20px;
    }
}

/* ========================================
   Print Styles
   ======================================== */

@media print {
    .header,
    .search-section,
    .recent-searches,
    .footer,
    .theme-toggle,
    .profile-actions,
    .repo-sort {
        display: none;
    }
    
    body {
        background: white;
        color: black;
    }
    
    .profile-card,
    .stats-card,
    .repos-section {
        border: 1px solid #ddd;
        box-shadow: none;
    }
}
/* ========================================
   GitHub Star Banner
   ======================================== */

.github-banner {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 12px 0;
    position: sticky;
    top: 0;
    z-index: 101;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    animation: slideDown 0.5s ease;
}

@keyframes slideDown {
    from {
        transform: translateY(-100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

@keyframes slideUp {
    from {
        transform: translateY(0);
        opacity: 1;
    }
    to {
        transform: translateY(-100%);
        opacity: 0;
    }
}

.github-banner-content {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    padding: 0 20px;
    flex-wrap: wrap;
}

.github-banner i.fab {
    font-size: 24px;
}

.github-banner span {
    font-size: 15px;
    font-weight: 500;
}

.github-banner-btn {
    background: white;
    color: #667eea;
    padding: 8px 20px;
    border-radius: 20px;
    text-decoration: none;
    font-weight: 600;
    font-size: 14px;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
}

.github-banner-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.github-banner-close {
    background: transparent;
    border: 2px solid white;
    color: white;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-left: auto;
}

.github-banner-close:hover {
    background: white;
    color: #667eea;
    transform: rotate(90deg);
}

/* ========================================
   Header Actions
   ======================================== */

.header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.header-btn {
    padding: 8px 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--border-radius-sm);
    text-decoration: none;
    color: var(--text-primary);
    font-size: 14px;
    font-weight: 600;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 6px;
}

.header-btn:hover {
    background: var(--bg-tertiary);
    border-color: var(--accent);
    transform: translateY(-2px);
}

.github-star-btn i {
    color: #fbbf24;
}

/* ========================================
   Support Section
   ======================================== */

.support-section {
    margin: 60px 0 40px;
    padding: 40px 0;
    background: var(--bg-primary);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.support-card {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
    border: 2px solid var(--border);
    border-radius: var(--border-radius);
    padding: 40px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.support-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(102, 126, 234, 0.1) 0%, transparent 70%);
    animation: pulse 4s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        opacity: 1;
    }
    50% {
        transform: scale(1.1);
        opacity: 0.8;
    }
}

.support-header {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-bottom: 16px;
}

.support-header i {
    font-size: 32px;
    color: #f43f5e;
    animation: heartbeat 1.5s ease-in-out infinite;
}

@keyframes heartbeat {
    0%, 100% {
        transform: scale(1);
    }
    10%, 30% {
        transform: scale(1.1);
    }
    20%, 40% {
        transform: scale(1);
    }
}

.support-header h3 {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
}

.support-card > p {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 30px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.support-buttons {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
    position: relative;
    z-index: 1;
}

.support-btn {
    padding: 14px 28px;
    border-radius: var(--border-radius);
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 10px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    position: relative;
    overflow: hidden;
}

.support-btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.support-btn:hover::before {
    width: 300px;
    height: 300px;
}

.support-btn i,
.support-btn span {
    position: relative;
    z-index: 1;
}

.coffee-btn {
    background: linear-gradient(135deg, #FFDD00 0%, #FBB034 100%);
    color: #1a1a1a;
}

.coffee-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(251, 176, 52, 0.4);
}

.sponsor-btn {
    background: linear-gradient(135deg, #EA4AAA 0%, #D62976 100%);
    color: white;
}

.sponsor-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(234, 74, 170, 0.4);
}

.star-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.star-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
}

/* ========================================
   Footer Enhancements
   ======================================== */

.footer {
    background: var(--bg-primary);
    border-top: 1px solid var(--border);
    padding: 50px 0 20px;
    margin-top: 0;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h4 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.footer-section p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

.footer-badges {
    display: flex;
    gap: 10px;
    margin-top: 12px;
    flex-wrap: wrap;
}

.footer-badges img {
    height: 20px;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 10px;
}

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

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

.developer-info {
    font-size: 14px;
}

.developer-info strong {
    color: var(--text-primary);
    font-size: 16px;
}

.social-links {
    display: flex;
    gap: 12px;
    margin-top: 12px;
}

.social-links a {
    width: 36px;
    height: 36px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-primary);
    transition: var(--transition);
    font-size: 16px;
}

.social-links a:hover {
    background: var(--accent);
    color: white;
    border-color: var(--accent);
    transform: translateY(-3px);
}

.footer-bottom {
    padding-top: 30px;
    border-top: 1px solid var(--border);
    text-align: center;
}

.copyright {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.copyright a {
    color: var(--accent);
    text-decoration: none;
    font-weight: 600;
}

.copyright a:hover {
    text-decoration: underline;
}

.footer-meta {
    font-size: 13px;
    color: var(--text-tertiary);
}

.footer-meta i {
    color: #f43f5e;
    animation: heartbeat 1.5s ease-in-out infinite;
}

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

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

/* ========================================
   Accessibility
   ======================================== */

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* ========================================
   Responsive Adjustments
   ======================================== */

@media (max-width: 768px) {
    .github-banner-content {
        font-size: 13px;
    }
    
    .github-banner span {
        font-size: 13px;
    }
    
    .header-btn .btn-text {
        display: none;
    }
    
    .support-card {
        padding: 30px 20px;
    }
    
    .support-header h3 {
        font-size: 22px;
    }
    
    .support-buttons {
        flex-direction: column;
    }
    
    .support-btn {
        width: 100%;
        justify-content: center;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
}

@media (max-width: 480px) {
    .github-banner-content {
        flex-direction: column;
        gap: 10px;
    }
    
    .github-banner-close {
        position: absolute;
        top: 10px;
        right: 10px;
        margin-left: 0;
    }
}