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

:root {
    --bg-dark: #0a0e1a;
    --bg-dark-alt: #141a2b;
    --bg-card: #0f1524;
    --text-primary: #ffffff;
    --text-secondary: #94a3b8;
    --accent: #facc15;
    --accent-hover: #eab308;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
}

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 6%;
    background-color: var(--bg-dark);
    z-index: 1000;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
}

.logo span {
    color: var(--accent);
}

.nav {
    display: flex;
    gap: 2rem;
}

.nav-link {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    transition: color 0.3s ease;
    cursor: pointer;
}

.nav-link:hover,
.nav-link.active {
    color: var(--accent);
}

.main {
    padding-top: 80px;
}

.section {
    display: none;
    min-height: calc(100vh - 80px);
    padding: 4rem 6%;
}

.section.active {
    display: block;
}

.hero {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 4rem;
    min-height: calc(100vh - 160px);
}

.hero-content {
    flex: 1;
}

.greeting {
    color: var(--accent);
    font-weight: 600;
    margin-bottom: 1rem;
    letter-spacing: 1px;
}

.hero-title {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.highlight {
    color: var(--accent);
}

.hero-description {
    color: var(--text-secondary);
    font-size: 1rem;
    margin-bottom: 2rem;
    max-width: 450px;
}

.btn {
    background-color: var(--accent);
    color: var(--bg-dark);
    border: none;
    padding: 0.75rem 1.5rem;
    font-weight: 700;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.95rem;
}

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

.hero-image {
    flex: 1;
    display: flex;
    justify-content: center;
}

.avatar-placeholder {
    width: 400px;
    height: 400px;
    background-color: var(--bg-card);
    border-radius: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 8rem;
    color: var(--text-secondary);
}

.about-container {
    display: flex;
    align-items: center;
    gap: 4rem;
    min-height: calc(100vh - 160px);
}

.about-image {
    flex: 1;
}

.about-img-placeholder {
    position: relative;
}

.about-img-placeholder::before {
    content: '';
    position: absolute;
    top: 30px;
    left: -30px;
    width: 400px;
    height: 400px;
    border: 8px solid var(--accent);
    border-radius: 30px;
    z-index: 0;
}

.img-box {
    position: relative;
    width: 400px;
    height: 400px;
    background-color: var(--bg-card);
    border-radius: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 8rem;
    color: var(--text-secondary);
    z-index: 1;
}

.about-content {
    flex: 1;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
}

.section-title.center {
    text-align: center;
}

.about-description {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    font-size: 1rem;
}

.articles-container,
.works-container {
    min-height: calc(100vh - 160px);
}

.section-description {
    color: var(--text-secondary);
    text-align: center;
    max-width: 600px;
    margin: 0 auto 3rem;
}

.section-description.center {
    text-align: center;
}

.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.article-card {
    background-color: var(--bg-card);
    padding: 2.5rem;
    border-radius: 12px;
    text-align: center;
    transition: transform 0.3s ease;
}

.article-card:hover {
    transform: translateY(-10px);
}

.article-icon {
    font-size: 2.5rem;
    color: var(--accent);
    margin-bottom: 1.5rem;
}

.article-title {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.article-description {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.works-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin-top: 3rem;
}

.work-item:first-child {
    grid-column: span 2;
    grid-row: span 2;
}

.work-img {
    width: 100%;
    height: 100%;
    min-height: 200px;
    background-color: var(--bg-card);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: var(--text-secondary);
    transition: transform 0.3s ease;
}

.work-item:first-child .work-img {
    min-height: 420px;
    font-size: 6rem;
}

.work-img:hover {
    transform: scale(1.02);
}

.footer {
    background-color: var(--bg-dark-alt);
    padding: 4rem 6% 2rem;
}

.footer-content {
    margin-bottom: 4rem;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin: 3rem 0;
}

.contact-item {
    display: flex;
    gap: 0.5rem;
}

.contact-label {
    color: var(--accent);
    font-weight: 700;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    max-width: 400px;
    margin-left: auto;
    margin-top: -180px;
}

.form-input,
.form-textarea {
    background-color: var(--bg-card);
    border: none;
    padding: 1rem;
    color: var(--text-primary);
    font-size: 1rem;
    border-radius: 6px;
    font-family: inherit;
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--text-secondary);
}

.form-textarea {
    min-height: 120px;
    resize: vertical;
}

.apps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.app-card {
    background-color: var(--bg-card);
    padding: 2.5rem;
    border-radius: 12px;
    text-align: center;
    transition: transform 0.3s ease;
}

.app-card:hover {
    transform: translateY(-10px);
}

.app-icon {
    font-size: 2.5rem;
    color: var(--accent);
    margin-bottom: 1.5rem;
}

.app-title {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.app-description {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
}

.app-btn {
    width: 100%;
    max-width: 150px;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--bg-card);
}

.copyright {
    color: var(--text-secondary);
    margin-top: 0.5rem;
    font-size: 0.9rem;
}

@media (max-width: 968px) {
    .hero,
    .about-container {
        flex-direction: column;
        text-align: center;
    }

    .hero-description {
        margin: 0 auto 2rem;
    }

    .avatar-placeholder,
    .img-box {
        width: 300px;
        height: 300px;
        font-size: 6rem;
    }

    .about-img-placeholder::before {
        display: none;
    }

    .works-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .work-item:first-child {
        grid-column: span 2;
    }

    .contact-form {
        margin-top: 2rem;
        margin-left: 0;
    }
}

@media (max-width: 640px) {
    .header {
        flex-direction: column;
        gap: 1rem;
        padding: 1rem;
    }

    .nav {
        gap: 1rem;
    }

    .hero-title {
        font-size: 2rem;
    }

    .section-title {
        font-size: 1.8rem;
    }

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

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

    .work-item:first-child {
        grid-column: span 1;
    }
}