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

:root {
    --bg-color: #fafafa;
    --text-primary: #1a1a1a;
    --text-secondary: #666;
    --text-muted: #999;
    --border-color: #e5e5e5;
    --hover-bg: #f0f0f0;
    --transition: all 0.3s ease;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg-color: #0a0a0a;
        --text-primary: #f5f5f5;
        --text-secondary: #a0a0a0;
        --text-muted: #666;
        --border-color: #2a2a2a;
        --hover-bg: #1a1a1a;
    }
}

html {
    font-size: 16px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Noto Sans SC', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 680px;
    margin: 0 auto;
    padding: 60px 24px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

header {
    margin-bottom: 80px;
}

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

.logo {
    font-size: 1.125rem;
    font-weight: 500;
    letter-spacing: -0.02em;
}

.lang-switch {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.875rem;
}

.lang-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: inherit;
    font-family: inherit;
    padding: 4px 6px;
    transition: var(--transition);
}

.lang-btn:hover {
    color: var(--text-secondary);
}

.lang-btn.active {
    color: var(--text-primary);
    font-weight: 500;
}

.lang-divider {
    color: var(--text-muted);
}

main {
    flex: 1;
}

.hero {
    margin-bottom: 80px;
}

.intro {
    font-size: 1.5rem;
    font-weight: 400;
    line-height: 1.7;
    color: var(--text-primary);
    letter-spacing: -0.01em;
}

.works {
    margin-bottom: 60px;
}

.section-title {
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-muted);
    margin-bottom: 24px;
}

.projects {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.project-card {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 20px;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    text-decoration: none;
    color: var(--text-primary);
    transition: var(--transition);
}

.project-card:hover {
    background: var(--hover-bg);
    transform: translateY(-2px);
}

.project-icon {
    width: 48px;
    height: 48px;
    flex-shrink: 0;
    border-radius: 10px;
    overflow: hidden;
}

.project-icon img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.project-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.project-name {
    font-size: 1rem;
    font-weight: 500;
    letter-spacing: -0.01em;
}

.project-desc {
    font-size: 0.8125rem;
    color: var(--text-secondary);
}

footer {
    margin-top: auto;
    padding-top: 60px;
}

.contact {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.contact a {
    color: var(--text-primary);
    text-decoration: none;
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition);
}

.contact a:hover {
    border-bottom-color: var(--text-primary);
}

.invest-link {
    color: var(--text-primary);
    text-decoration: none;
    border-bottom: 1px solid var(--text-muted);
    transition: var(--transition);
}

.invest-link:hover {
    border-bottom-color: var(--text-primary);
}

@media (max-width: 480px) {
    .container {
        padding: 24px 20px;
        min-height: 100dvh;
    }

    header {
        margin-bottom: 32px;
    }

    .hero {
        margin-bottom: 32px;
    }

    .intro {
        font-size: 1.125rem;
        line-height: 1.6;
    }

    .works {
        margin-bottom: 24px;
    }

    .section-title {
        margin-bottom: 12px;
    }

    .projects {
        gap: 8px;
    }

    .project-card {
        padding: 12px 14px;
        gap: 12px;
    }

    .project-icon {
        width: 40px;
        height: 40px;
    }

    .project-name {
        font-size: 0.9375rem;
    }

    .project-desc {
        font-size: 0.75rem;
    }

    footer {
        padding-top: 16px;
    }

    .contact {
        font-size: 0.8125rem;
    }
}

@media (min-width: 1200px) {
    .container {
        max-width: 720px;
    }
}