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

:root {
    --color-bg: #fafaf9;
    --color-text: #1a1a1a;
    --color-text-secondary: #6b6b6b;
    --color-accent: #8b2500;
    --color-border: #e8e4df;
    --color-surface: #f5f0eb;
    --color-card-bg: #fff;
    --font-serif: 'Noto Serif SC', serif;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-serif);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.7;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container {
    max-width: 720px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(250, 250, 249, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    z-index: 100;
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 60px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--color-text);
}

.logo-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: var(--color-accent);
    color: #fff;
    font-family: var(--font-serif);
    font-weight: 700;
    font-size: 16px;
    border-radius: 7px;
}

.logo-text {
    font-family: var(--font-serif);
    font-weight: 700;
    font-size: 18px;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 28px;
}

.nav-links a {
    display: inline-flex;
    align-items: center;
    padding: 6px 12px;
    border-radius: 999px;
    text-decoration: none;
    color: var(--color-text-secondary);
    font-size: 14px;
    font-weight: 500;
    transition: color 0.2s ease, background-color 0.2s ease;
}

.nav-links a:hover {
    color: var(--color-accent);
    background: var(--color-surface);
}

/* Main */
.main {
    flex: 1;
    padding-top: 60px;
}

/* Hero */
.hero {
    padding: 80px 0 64px;
}

.hero-title {
    font-family: var(--font-serif);
    font-size: 36px;
    font-weight: 700;
    letter-spacing: 1px;
    margin-bottom: 20px;
    line-height: 1.3;
}

.hero-desc {
    color: var(--color-text-secondary);
    font-size: 15px;
    line-height: 1.9;
    max-width: 580px;
}

/* Section Title */
.section-title {
    font-family: var(--font-serif);
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 24px;
}

/* Project Cards */
.projects {
    padding-bottom: 72px;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.project-card {
    text-decoration: none;
    color: inherit;
    background: var(--color-card-bg);
    border: 1px solid var(--color-border);
    border-radius: 14px;
    overflow: hidden;
    box-shadow: 0 1px 3px rgba(16, 15, 15, 0.03);
    transition: border-color 0.3s ease, box-shadow 0.3s ease, transform 0.3s ease;
}

.project-card:hover {
    border-color: var(--color-accent);
    box-shadow: 0 8px 32px rgba(139, 37, 0, 0.08), 0 2px 8px rgba(0, 0, 0, 0.04);
    transform: translateY(-2px);
}

.project-card-inner {
    padding: 32px 28px;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.project-label {
    display: inline-block;
    width: fit-content;
    padding: 3px 10px;
    background: #f5f0eb;
    color: var(--color-accent);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    border-radius: 5px;
    margin-bottom: 18px;
}

.project-title {
    font-family: var(--font-serif);
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 10px;
    line-height: 1.3;
}

.project-desc {
    color: var(--color-text-secondary);
    font-size: 14px;
    line-height: 1.8;
    flex: 1;
}

.project-arrow {
    display: inline-block;
    margin-top: 20px;
    font-size: 18px;
    color: var(--color-accent);
    transition: transform 0.3s ease;
}

.project-card:hover .project-arrow {
    transform: translateX(4px);
}

/* About */
.about {
    padding-bottom: 72px;
}

.about-content {
    color: var(--color-text-secondary);
    font-size: 15px;
    line-height: 1.9;
}

.about-content p + p {
    margin-top: 12px;
}

/* Contact */
.contact {
    padding-bottom: 96px;
}

.contact-desc {
    color: var(--color-text-secondary);
    font-size: 15px;
    margin-bottom: 12px;
}

.contact-email {
    color: var(--color-accent);
    text-decoration: none;
    font-size: 15px;
    font-weight: 600;
    transition: opacity 0.2s ease;
}

.contact-email:hover {
    opacity: 0.75;
}

/* Footer */
.footer {
    padding: 28px 0;
    text-align: center;
    border-top: 1px solid var(--color-border);
    color: var(--color-text-secondary);
    font-size: 13px;
}

/* Nav active state */
.nav-links a.active {
    color: var(--color-accent);
}

/* Articles listing */
.articles-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.article-list-date {
    display: block;
    font-size: 13px;
    color: var(--color-text-secondary);
    margin-bottom: 8px;
}

/* Article page */
.article-header {
    padding: 80px 0 40px;
}

.article-back {
    display: inline-block;
    font-size: 14px;
    color: var(--color-text-secondary);
    text-decoration: none;
    margin-bottom: 24px;
    transition: color 0.2s ease;
}

.article-back:hover {
    color: var(--color-accent);
}

.article-title {
    font-family: var(--font-serif);
    font-size: 32px;
    font-weight: 700;
    letter-spacing: 1px;
    margin-bottom: 12px;
    line-height: 1.3;
}

.article-date {
    display: block;
    font-size: 14px;
    color: var(--color-text-secondary);
}

.article-body {
    padding-bottom: 96px;
    font-size: 16px;
    line-height: 2;
    color: var(--color-text);
}

.article-body p {
    margin-bottom: 16px;
}

.article-body h1, .article-body h2, .article-body h3 {
    font-family: var(--font-serif);
    font-weight: 700;
    margin: 32px 0 16px;
    line-height: 1.4;
}

.article-body h1 { font-size: 24px; }
.article-body h2 { font-size: 20px; }
.article-body h3 { font-size: 18px; }

.article-body ul, .article-body ol {
    margin: 12px 0 12px 24px;
}

.article-body li {
    margin-bottom: 6px;
}

.article-body blockquote {
    border-left: 3px solid var(--color-border);
    padding-left: 16px;
    color: var(--color-text-secondary);
    margin: 16px 0;
}

.article-body hr {
    border: none;
    border-top: 1px solid var(--color-border);
    margin: 32px 0;
}

.article-body strong {
    font-weight: 600;
}

.article-body table {
    border-collapse: collapse;
    margin: 16px 0;
    width: 100%;
}

.article-body th, .article-body td {
    border: 1px solid var(--color-border);
    padding: 8px 12px;
    text-align: left;
    font-size: 14px;
}

.article-body th {
    background: var(--color-surface);
    font-weight: 600;
}

/* Responsive */
@media (max-width: 600px) {
    .nav-links {
        gap: 20px;
    }

    .hero {
        padding: 56px 0 48px;
    }

    .hero-title {
        font-size: 28px;
    }

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

    .project-card-inner {
        padding: 24px 22px;
    }

    .project-title {
        font-size: 20px;
    }

    .projects {
        padding-bottom: 56px;
    }

    .about {
        padding-bottom: 56px;
    }

    .contact {
        padding-bottom: 64px;
    }

    .article-header {
        padding: 56px 0 32px;
    }

    .article-title {
        font-size: 26px;
    }

    .article-body {
        font-size: 15px;
        padding-bottom: 64px;
    }
}

@media (max-width: 420px) {
    .nav-links {
        gap: 16px;
    }

    .nav-links a {
        font-size: 13px;
    }
}