/* Reset & base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --bg-base: #f8fafc;
    --bg-card: #ffffff;
    --text-main: #1f2937;
    --text-muted: #6b7280;
    --text-label: #374151;
    --ring: rgba(17, 24, 39, 0.05);
    --divider: #e5e7eb;
    --brand: #4f46e5;
    --brand-soft: rgba(79, 70, 229, 0.08);
    --shadow: 0 4px 24px rgba(31, 41, 55, 0.08);
    --radius: 16px;
    --max-width: 1000px;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    color: var(--text-main);
    background: var(--bg-base);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a {
    color: inherit;
    text-decoration: none;
}

.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* Header */
.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(248, 250, 252, 0.92);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--divider);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.logo {
    font-size: 1.25rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    color: var(--brand);
}

.main-nav {
    display: flex;
    gap: 28px;
}

.main-nav a {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-label);
    transition: color 0.2s ease;
}

.main-nav a:hover {
    color: var(--brand);
}

.main-nav a.active {
    color: var(--brand);
    font-weight: 600;
}

.lang-switch {
    font-size: 0.8rem;
    padding: 2px 8px;
    border: 1px solid var(--divider);
    border-radius: 6px;
    color: var(--text-muted);
    transition: all 0.2s ease;
}
.lang-switch:hover {
    border-color: var(--brand);
    color: var(--brand);
}

/* Hero */
.hero {
    padding: 120px 0 100px;
    text-align: center;
}

.hero-title {
    font-size: 3rem;
    font-weight: 800;
    letter-spacing: -0.04em;
    margin-bottom: 16px;
}

.hero-subtitle {
    font-size: 1.15rem;
    color: var(--text-label);
    font-weight: 500;
    margin-bottom: 12px;
}

.hero-desc {
    font-size: 1rem;
    color: var(--text-muted);
    max-width: 560px;
    margin: 0 auto;
}

/* Sections */
.section {
    padding: 80px 0;
}

.section-alt {
    background: #ffffff;
    border-top: 1px solid var(--divider);
    border-bottom: 1px solid var(--divider);
}

.section-title {
    font-size: 1.75rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 48px;
    letter-spacing: -0.02em;
}

/* Cards */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 24px;
}

.project-card {
    display: block;
    background: var(--bg-card);
    border: 1px solid var(--divider);
    border-radius: var(--radius);
    padding: 28px;
    box-shadow: var(--shadow);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.project-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(31, 41, 55, 0.12);
}

.card-icon {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    font-size: 1rem;
    margin-bottom: 14px;
    background: var(--bg-base);
    color: var(--text-label);
    border: 1px solid var(--divider);
}

.icon-blog,
.icon-game,
.icon-poker,
.icon-web {
    background: var(--bg-base);
}

.card-title {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.card-desc {
    font-size: 0.95rem;
    color: var(--text-muted);
    line-height: 1.5;
}

.card-placeholder {
    opacity: 0.85;
}

/* Team */
.team-card {
    display: flex;
    align-items: flex-start;
    gap: 24px;
    max-width: 640px;
    margin: 0 auto;
    background: var(--bg-card);
    border: 1px solid var(--divider);
    border-radius: var(--radius);
    padding: 32px;
    box-shadow: var(--shadow);
}

.team-avatar {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: var(--brand-soft);
    color: var(--brand);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    flex-shrink: 0;
}

.team-info h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.team-info p {
    color: var(--text-muted);
}

/* Contact */
.contact-desc {
    text-align: center;
    color: var(--text-muted);
    margin-bottom: 24px;
}

.contact-links {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

.contact-link {
    display: inline-block;
    padding: 10px 20px;
    border-radius: 999px;
    font-weight: 500;
    font-size: 0.95rem;
    transition: all 0.2s ease;
}

.contact-link:not(.placeholder) {
    background: var(--brand);
    color: #fff;
}

.contact-link:not(.placeholder):hover {
    background: #4338ca;
}

.contact-link.placeholder {
    background: var(--bg-card);
    border: 1px solid var(--divider);
    color: var(--text-muted);
    cursor: default;
}

/* Footer */
.site-footer {
    padding: 40px 0;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.875rem;
    border-top: 1px solid var(--divider);
}

/* Project detail page */
.detail-wrap {
    padding: 48px 0 80px;
}

.detail-back {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-muted);
    margin-bottom: 28px;
    transition: color 0.2s ease;
}

.detail-back:hover {
    color: var(--brand);
}

.detail-header {
    margin-bottom: 32px;
}

.detail-title {
    font-size: 2.25rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    margin-bottom: 12px;
}

.detail-subtitle {
    font-size: 1.05rem;
    color: var(--text-label);
    font-weight: 500;
    margin-bottom: 16px;
}

.detail-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.detail-tag {
    font-size: 0.8rem;
    padding: 4px 12px;
    border-radius: 999px;
    background: var(--brand-soft);
    color: var(--brand);
    font-weight: 500;
}

.detail-cover-wrap {
    width: 100%;
    height: 420px;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: var(--radius);
    border: 1px solid var(--divider);
    box-shadow: var(--shadow);
    margin: 8px 0 36px;
    overflow: hidden;
}

.detail-cover {
    max-width: 80%;
    max-height: 80%;
    width: auto;
    height: auto;
    object-fit: contain;
    display: block;
}

.detail-content {
    max-width: 760px;
}

.detail-content h2 {
    font-size: 1.4rem;
    font-weight: 700;
    margin: 36px 0 14px;
    padding-left: 12px;
    border-left: 4px solid var(--brand);
    letter-spacing: -0.01em;
}

.detail-content h3 {
    font-size: 1.12rem;
    font-weight: 700;
    margin: 24px 0 10px;
}

.detail-content p {
    color: var(--text-main);
    margin-bottom: 14px;
}

.detail-content ul {
    margin: 0 0 16px 22px;
}

.detail-content li {
    margin-bottom: 8px;
    color: var(--text-main);
}

.detail-content strong {
    color: var(--text-label);
    font-weight: 700;
}

.detail-content code {
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 0.88em;
    background: var(--bg-base);
    border: 1px solid var(--divider);
    border-radius: 6px;
    padding: 1px 6px;
}

.detail-content blockquote {
    margin: 20px 0;
    padding: 14px 18px;
    background: var(--bg-card);
    border-left: 4px solid var(--brand);
    border-radius: 0 10px 10px 0;
    color: var(--text-muted);
}

.detail-content blockquote a {
    color: var(--brand);
    text-decoration: underline;
}

.detail-links {
    margin-top: 36px;
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.detail-link {
    display: inline-block;
    padding: 10px 20px;
    border-radius: 999px;
    font-weight: 500;
    font-size: 0.95rem;
    background: var(--brand);
    color: #fff;
    transition: background 0.2s ease;
}

.detail-link:hover {
    background: #4338ca;
}

/* Responsive */
@media (max-width: 640px) {
    .hero-title {
        font-size: 2.25rem;
    }

    .hero {
        padding: 80px 0 60px;
    }

    .main-nav {
        gap: 18px;
    }

    .main-nav a {
        font-size: 0.875rem;
    }

    .team-card {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

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

    .detail-title {
        font-size: 1.75rem;
    }

    .detail-content {
        font-size: 0.95rem;
    }

    .detail-cover-wrap {
        height: 280px;
    }
}