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

html {
    scrollbar-width: none;
    -ms-overflow-style: none;
    scroll-behavior: smooth;
}

html::-webkit-scrollbar {
    display: none;
}

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    min-height: 100vh;
    background: #0a0a0f;
    color: #c9d1d9;
    line-height: 1.4;
}

:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #161b22;
    --bg-tertiary: #21262d;
    --border: #30363d;
    --text-primary: #f0f6fc;
    --text-secondary: #8b949e;
    --accent: #58a6ff;
    --success: #3fb950;
    --danger: #f85149;
}

/* Language Bar */
.language-bar {
    max-width: 1200px;
    margin: 0 auto 0.5rem;
    display: flex;
    justify-content: flex-end;
    gap: 0.3rem;
    padding: 0.3rem 1rem;
}

.lang-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.35rem 0.75rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.8rem;
    font-weight: 500;
    transition: all 0.15s ease;
}

.lang-btn:hover {
    color: var(--text-primary);
    border-color: var(--accent);
}

.lang-btn.active {
    background: var(--bg-tertiary);
    color: var(--accent);
    border-color: var(--accent);
}

.lang-btn svg {
    border-radius: 2px;
}

/* Banner */
.banner {
    max-width: 1200px;
    margin: 0 auto 0.5rem;
    padding: 0.75rem;
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: center;
    gap: 1rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
}

.banner-avatar {
    width: 90px;
    height: 90px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--border);
    flex-shrink: 0;
}

.banner-name {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
}

.banner-role {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 0.1rem;
}

.banner-email {
    display: inline-block;
    margin-top: 0.4rem;
    font-size: 0.85rem;
    color: var(--accent);
    text-decoration: none;
    border-bottom: 1px dashed var(--accent);
    transition: opacity 0.15s ease;
}

.banner-email:hover {
    opacity: 0.8;
}

.social-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    color: var(--text-secondary);
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 6px;
    transition: all 0.15s ease;
}

.social-link:hover {
    color: var(--accent);
    border-color: var(--accent);
    transform: translateY(-2px);
}

.banner-about {
    max-width: 1200px;
    margin: 0 auto 0.5rem;
    padding: 0.75rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
}

.banner-about-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.banner-about-text {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.5;
    margin-bottom: 0.5rem;
}

.banner-about-text:last-of-type {
    margin-bottom: 0.75rem;
}

.banner-about-stats {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.banner-about-stat {
    display: flex;
    flex-direction: column;
    gap: 0.1rem;
}

.banner-about-stat strong {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent);
}

.banner-about-stat span {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* Banner Columns Layout */
.banner-columns {
    max-width: 1200px;
    margin: 0 auto 0.5rem;
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 0.75rem;
    padding: 0 1rem;
}

.banner-columns > .banner {
    margin: 0;
    max-width: none;
}

.banner-columns > .banner-about {
    margin: 0;
    max-width: none;
}

/* Stats Card */
.stats-card {
    max-width: 1200px;
    margin: 0 auto 0.5rem;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.5rem;
    background: var(--bg-secondary);
    padding: 0.75rem;
    border: 1px solid var(--border);
}

.stats-grid img {
    width: 100%;
    height: auto;
    display: block;
    object-fit: contain;
}

/* Filters */
.filters-section {
    background: var(--bg-primary);
    position: sticky;
    z-index: 10;
}

.filters {
    display: flex;
    justify-content: center;
    gap: 0.4rem;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 0.4rem 1rem;
    border: 1px solid var(--border);
    background: var(--bg-secondary);
    cursor: pointer;
    transition: all 0.15s ease;
    font-weight: 500;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.filter-btn:hover {
    background: var(--bg-tertiary);
    color: #c9d1d9;
    border-color: var(--accent);
}

.filter-btn.active {
    background: var(--text-primary);
    color: var(--bg-primary);
    border-color: var(--text-primary);
    font-weight: 600;
}

.filter-btn .count {
    margin-left: 0.3rem;
    font-weight: 700;
    background: rgba(255, 255, 255, 0.1);
    padding: 0.1rem 0.5rem;
    font-size: 0.85rem;
}

.filter-btn.active .count {
    background: rgba(0, 0, 0, 0.2);
}

/* Projects Grid */
.projects-container {
    padding: 0.5rem 0.75rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 0.5rem;
}

/* Cards */
.github-preview,
.cert-preview {
    position: relative;
    cursor: pointer;
    transition: all 0.2s ease;
}

.github-preview {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
}

.github-preview::after {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0);
    transition: background 0.3s ease;
    pointer-events: none;
    z-index: 1;
}

.github-preview:hover {
    transform: translateY(-2px);
    border-color: var(--accent);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
}

.github-preview:hover::after {
    background: rgba(0, 0, 0, 0.3);
}

.cert-preview:hover {
    transform: scale(1.02);
}

.github-preview.hidden,
.cert-preview.hidden {
    display: none;
}

/* Images */
.preview-image {
    width: 100%;
    height: auto;
    display: block;
    background: var(--bg-primary);
}

.github-preview .preview-image {
    max-height: 180px;
    object-fit: contain;
}

.cert-preview .preview-image {
    padding: 0;
    background: none;
    max-height: none;
}

/* GitHub Icon */
.github-icon {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    width: 20px;
    height: 20px;
    fill: var(--text-primary);
    opacity: 0.7;
    transition: opacity 0.2s ease;
    pointer-events: none;
    z-index: 2;
}

.github-preview:hover .github-icon {
    opacity: 1;
}

/* Footer & Badges */
.preview-footer {
    padding: 0.5rem 0.75rem;
    border-top: 1px solid #21262d;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.preview-title {
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--text-primary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    flex: 1;
    margin-right: 0.3rem;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.2rem;
    padding: 0.15rem 0.5rem;
    font-size: 0.7rem;
    font-weight: 600;
    white-space: nowrap;
    border: 1px solid;
}

.badge-success {
    background: #0d2913;
    color: var(--success);
    border-color: #1a7f37;
}

.badge-development {
    background: #2d1213;
    color: var(--danger);
    border-color: #da3633;
}

/* Back to Top */
.back-to-top {
    position: fixed;
    bottom: 1.25rem;
    right: 1.25rem;
    background: var(--text-primary);
    color: var(--bg-primary);
    border: none;
    width: 40px;
    height: 40px;
    font-size: 1rem;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s, visibility 0.3s, transform 0.2s;
    z-index: 100;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: scale(1.1);
    background: #c9d1d9;
}

/* Responsive */
@media (max-width: 640px) {
    .language-bar {
        justify-content: center;
    }

    .banner-columns {
        grid-template-columns: 1fr;
        padding: 0 0.5rem;
    }

    .banner {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .fist-banner {
        flex-direction: column;
        text-align: center;
    }

    .fist-banner-icos-social {
        justify-content: center;
    }

    .banner-about-stats {
        flex-direction: column;
        gap: 0.5rem;
    }
}

.fist-banner {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.fist-banner-icos-social {
    display: flex;
    align-items: center;
    gap: 0.4rem;
}