/* Button Components */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-base);
    font-weight: 500;
    text-decoration: none;
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.btn-icon {
    width: 18px;
    height: 18px;
    stroke-width: 2;
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--text-inverse);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
    color: var(--text-inverse);
}

.btn-secondary {
    background-color: transparent;
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

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

.btn-download {
    background-color: var(--success-color);
    color: var(--text-inverse);
    box-shadow: var(--shadow-md);
}

.btn-download:hover {
    background-color: #059669;
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
    color: var(--text-inverse);
}

/* Card Components */
.feature-card {
    background-color: var(--bg-card);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
    height: 100%;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.feature-card.featured {
    border-color: var(--primary-color);
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.05) 0%, var(--bg-card) 100%);
}

.feature-icon {
    width: 48px;
    height: 48px;
    background-color: var(--primary-color);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-lg);
}

.feature-icon svg {
    width: 24px;
    height: 24px;
    stroke: var(--text-inverse);
    stroke-width: 2;
}

.feature-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.feature-description {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}

.feature-list {
    list-style: none;
    padding: 0;
}

.feature-list li {
    position: relative;
    padding-left: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
    color: var(--text-secondary);
}

.feature-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--success-color);
    font-weight: 600;
}

/* Tab Showcase Component */
.tab-showcase {
    /* Removed perspective for flat design */
}

.tab-window {
    background-color: var(--bg-card);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    /* Removed 3D transforms for flat design */
    transition: box-shadow var(--transition-slow);
    max-width: 600px;
    width: 100%;
    margin: 0 auto;
}

.tab-window:hover {
    box-shadow: var(--shadow-2xl);
}

.tab-header {
    background-color: var(--bg-tertiary);
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    min-height: 48px;
    overflow: hidden;
}

.tab-controls {
    display: flex;
    gap: var(--spacing-sm);
}

.tab-control {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.tab-control.close {
    background-color: #ef4444;
}

.tab-control.minimize {
    background-color: #f59e0b;
}

.tab-control.maximize {
    background-color: #10b981;
}

.tab-bar {
    display: flex;
    gap: var(--spacing-xs);
    flex: 1;
    overflow-x: auto;
    overflow-y: hidden;
    scrollbar-width: thin;
    scrollbar-color: #87ceeb #f0f8ff;
    padding-bottom: 6px;
    margin-bottom: -6px;
    min-width: 0;
    max-width: 100%;
}

.tab-bar::-webkit-scrollbar {
    height: 6px;
}

.tab-bar::-webkit-scrollbar-track {
    background: #f0f8ff;
    border-radius: 3px;
}

.tab-bar::-webkit-scrollbar-thumb {
    background: linear-gradient(90deg, #87ceeb 0%, #6bb6ff 50%, #4da6ff 100%);
    border-radius: 3px;
    border: 1px solid #b3d9ff;
    transition: all var(--transition-fast);
}

.tab-bar::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(90deg, #6bb6ff 0%, #4da6ff 50%, #3399ff 100%);
    border-color: #99ccff;
    box-shadow: 0 0 4px rgba(135, 206, 235, 0.4);
}

.tab-bar::-webkit-scrollbar-corner {
    background: #f0f8ff;
}

.tab {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--bg-secondary);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    min-width: 120px;
    max-width: 200px;
    flex-shrink: 0;
    white-space: nowrap;
}

.tab span {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    flex: 1;
    min-width: 0;
}

.tab.active {
    background-color: var(--bg-card);
    color: var(--text-primary);
    box-shadow: var(--shadow-sm);
}

.tab-icon {
    width: 14px;
    height: 14px;
    stroke-width: 2;
}

.tab-close {
    margin-left: var(--spacing-xs);
    opacity: 0.5;
    transition: all var(--transition-fast);
    cursor: pointer;
    border-radius: 50%;
    width: 16px;
    height: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    line-height: 1;
}

.tab-close:hover {
    opacity: 1;
    background-color: rgba(239, 68, 68, 0.1);
    color: #ef4444;
}

.tab:hover .tab-close {
    opacity: 1;
}

/* Tab creation and deletion animations */
.tab {
    transition: all var(--transition-normal);
}

.tab.tab-creating {
    animation: tabSlideIn 0.3s ease-out;
}

.tab.tab-closing {
    animation: tabSlideOut 0.3s ease-in forwards;
}

@keyframes tabSlideIn {
    from {
        opacity: 0;
        transform: scale(0.8) translateX(-20px);
        max-width: 0;
    }

    to {
        opacity: 1;
        transform: scale(1) translateX(0);
        max-width: 200px;
    }
}

@keyframes tabSlideOut {
    from {
        opacity: 1;
        transform: scale(1) translateX(0);
        max-width: 200px;
    }

    to {
        opacity: 0;
        transform: scale(0.8) translateX(-20px);
        max-width: 0;
        padding: 0;
        margin: 0;
    }
}

.tab-new {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background-color: var(--bg-secondary);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    flex-shrink: 0;
    margin-left: var(--spacing-sm);
}

.tab-new:hover {
    background-color: var(--primary-color);
    color: var(--text-inverse);
}

.tab-content {
    padding: var(--spacing-lg);
    height: 200px;
}

.content-area {
    height: 100%;
    background-color: var(--bg-secondary);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: #87ceeb #f0f8ff;
}

.content-area::-webkit-scrollbar {
    width: 6px;
}

.content-area::-webkit-scrollbar-track {
    background: #f0f8ff;
    border-radius: 3px;
}

.content-area::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, #87ceeb 0%, #6bb6ff 100%);
    border-radius: 3px;
    border: 1px solid #b3d9ff;
    transition: all 0.3s ease;
}

.content-area::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(180deg, #6bb6ff 0%, #4da6ff 100%);
    border-color: #99ccff;
    box-shadow: 0 0 4px rgba(135, 206, 235, 0.3);
}

.file-explorer {
    height: 100%;
}

.file-tree {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.file-item {
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    cursor: pointer;
    transition: background-color var(--transition-fast);
}

.file-item:hover {
    background-color: var(--bg-card);
}

/* Download Components */
.download-card {
    background-color: var(--bg-card);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    text-align: center;
    transition: all var(--transition-normal);
}

.download-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.download-icon {
    width: 64px;
    height: 64px;
    background-color: var(--primary-color);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-lg);
}

.download-icon svg {
    width: 32px;
    height: 32px;
    stroke: var(--text-inverse);
    stroke-width: 1.5;
}

.download-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.download-description {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

.download-options {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.download-select {
    padding: var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background-color: var(--bg-card);
    color: var(--text-primary);
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: border-color var(--transition-fast);
    scrollbar-width: thin;
    scrollbar-color: #87ceeb #f0f8ff;
}

.download-select:focus {
    outline: none;
    border-color: var(--primary-color);
}

.download-select::-webkit-scrollbar {
    width: 6px;
}

.download-select::-webkit-scrollbar-track {
    background: #f0f8ff;
    border-radius: 3px;
}

.download-select::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, #87ceeb 0%, #6bb6ff 100%);
    border-radius: 3px;
    border: 1px solid #b3d9ff;
}

.download-select::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(180deg, #6bb6ff 0%, #4da6ff 100%);
    border-color: #99ccff;
}

/* System Requirements */
.system-requirements {
    background-color: var(--bg-card);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
}

.system-requirements h3 {
    text-align: center;
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
}

.requirements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.requirement-item {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.requirement-item strong {
    color: var(--text-primary);
    font-weight: 600;
}

.requirement-item span {
    color: var(--text-secondary);
}

/* Special Link Styling (with blue underline expanding to full background on hover with glow) */
.special-link {
    position: relative;
    color: var(--primary-color);
    text-decoration: none;
    padding: 2px 4px;
    transition: all var(--transition-normal);
    background: linear-gradient(to right, transparent 0%, transparent 100%);
    background-size: 0% 100%;
    background-repeat: no-repeat;
    background-position: left bottom;
    border-bottom: 2px solid var(--primary-color);
}

.special-link:hover {
    color: var(--text-inverse);
    border-radius: var(--radius-sm);
    background: linear-gradient(to right, var(--primary-color) 0%, var(--accent-color) 100%);
    background-size: 100% 100%;
    box-shadow: 0 0 20px rgba(37, 99, 235, 0.4);
    transform: translateY(-1px);
}

/* Author Link with Glowing Effect */
.author-link {
    position: relative;
    color: var(--primary-color);
    text-decoration: none;
    padding: 4px 8px;
    transition: all var(--transition-normal);
    background: linear-gradient(135deg, transparent 0%, transparent 100%);
    border-bottom: 2px solid var(--primary-color);
}

.author-link:hover {
    color: var(--text-inverse);
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
    box-shadow:
        0 0 20px rgba(37, 99, 235, 0.6),
        0 0 40px rgba(37, 99, 235, 0.4),
        0 0 60px rgba(37, 99, 235, 0.2);
    transform: translateY(-2px);
    border-bottom-color: transparent;
}

/* Tech Stack Components */
.tech-category {
    background-color: var(--bg-card);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
}

.tech-category-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

.tech-items {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.tech-item {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    padding: var(--spacing-md);
    background-color: var(--bg-secondary);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.tech-item:hover {
    background-color: var(--bg-tertiary);
    transform: translateX(4px);
}

.tech-name {
    font-weight: 600;
    color: var(--text-primary);
    font-size: var(--font-size-base);
}

.tech-description {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

/* Open Source Info */
.open-source-info {
    margin-top: var(--spacing-3xl);
}

.open-source-card {
    background-color: var(--bg-card);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    text-align: center;
}

.open-source-card h3 {
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.open-source-card p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

.open-source-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

/* Footer Components */
.footer-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.footer-logo {
    width: 32px;
    height: 32px;
}

.footer-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--text-inverse);
}

.footer-description {
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.6;
}

.footer-section-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-inverse);
    margin-bottom: var(--spacing-md);
}

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

.footer-links li {
    margin-bottom: var(--spacing-sm);
}

.footer-link {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-link:hover {
    color: var(--text-inverse);
}

.footer-author {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: var(--spacing-sm);
}

.footer-license {
    color: rgba(255, 255, 255, 0.7);
}

.footer-copyright {
    color: rgba(255, 255, 255, 0.7);
    font-size: var(--font-size-sm);
}

.footer-social {
    display: flex;
    gap: var(--spacing-md);
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    color: rgba(255, 255, 255, 0.7);
    transition: all var(--transition-fast);
}

.social-link:hover {
    background-color: var(--primary-color);
    color: var(--text-inverse);
    transform: translateY(-2px);
}

.social-link svg {
    width: 20px;
    height: 20px;
}