@import url('https://fonts.googleapis.com/css2?family=DM+Mono:wght@400;500&family=Sora:wght@300;400;600&display=swap');

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

  :root {
    --bg: #f5f4f0;
    --surface: #ffffff;
    --text: #1a1a18;
    --text-sub: #6b6b65;
    --accent: #2a2a26;
    --accent-ai: #2f5d7a;
    --line: rgba(0,0,0,0.09);
    --tag-bg: #efefeb;
    --tag-text: #3a3a36;
    --tag-feature-bg: #e8eef5;
    --tag-feature-text: #2c4560;
    --tag-ai-bg: #e6f0f5;
    --tag-ai-text: #1e4a63;
    --radius: 12px;
  }

  @media (prefers-color-scheme: dark) {
    :root {
      --bg: #141412;
      --surface: #1e1e1c;
      --text: #f0ede8;
      --text-sub: #888880;
      --accent: #d4d0c8;
      --line: rgba(255,255,255,0.08);
      --tag-bg: #2a2a28;
      --tag-text: #b8b4ac;
      --tag-feature-bg: #252a32;
      --tag-feature-text: #9eb4cc;
      --accent-ai: #7eb8d4;
      --tag-ai-bg: #1e2a34;
      --tag-ai-text: #a8d4ea;
    }
  }

  body {
    font-family: 'Sora', sans-serif;
    background:
      radial-gradient(ellipse 120% 80% at 100% -20%, rgba(47, 93, 122, 0.08), transparent 50%),
      radial-gradient(ellipse 80% 60% at 0% 100%, rgba(47, 93, 122, 0.05), transparent 45%),
      var(--bg);
    color: var(--text);
    min-height: 100vh;
  }

  .lang-bar {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--bg);
    border-bottom: 0.5px solid var(--line);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2rem;
    height: 52px;
  }

  .logo {
    font-family: 'DM Mono', monospace;
    font-size: 13px;
    letter-spacing: 0.06em;
    color: var(--text-sub);
  }

  .lang-switcher {
    display: flex;
    gap: 4px;
  }

  .lang-btn {
    background: none;
    border: 0.5px solid transparent;
    border-radius: 6px;
    padding: 4px 10px;
    font-family: 'Sora', sans-serif;
    font-size: 12px;
    color: var(--text-sub);
    cursor: pointer;
    transition: all 0.15s;
  }

  .lang-btn:hover { border-color: var(--line); color: var(--text); }
  .lang-btn.active {
    background: var(--surface);
    border-color: var(--line);
    color: var(--text);
    font-weight: 600;
  }

  .content { display: none; }
  .content.visible { display: block; }

  section {
    max-width: 800px;
    margin: 0 auto;
    padding: 4rem 2rem;
    border-bottom: 0.5px solid var(--line);
  }

  section:last-of-type { border-bottom: none; }

  .hero {
    padding-top: 6rem;
    padding-bottom: 6rem;
    max-width: 920px;
  }

  .hero-layout {
    display: flex;
    align-items: flex-start;
    gap: 2.5rem;
    justify-content: space-between;
  }

  .hero-main {
    flex: 1;
    min-width: 0;
  }

  .hero-photo {
    flex-shrink: 0;
  }

  .profile-photo-wrap {
    position: relative;
    width: 168px;
    height: 168px;
    border-radius: 50%;
    overflow: hidden;
    border: 0.5px solid var(--line);
    background: var(--tag-bg);
  }

  .profile-photo {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
  }

  .profile-photo-wrap.is-empty .profile-photo {
    display: none;
  }

  .profile-photo-fallback {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-sub);
    font-size: 3rem;
    opacity: 0.45;
  }

  .profile-photo-wrap:not(.is-empty) .profile-photo-fallback {
    display: none;
  }

  @media (max-width: 720px) {
    .hero-layout {
      flex-direction: column-reverse;
      align-items: center;
      text-align: center;
    }
    .hero-main .badge { margin-left: auto; margin-right: auto; }
    .hero-sub { margin-left: auto; margin-right: auto; }
    .cta-row { justify-content: center; }
  }

  .badge {
    display: inline-block;
    font-family: 'DM Mono', monospace;
    font-size: 11px;
    letter-spacing: 0.08em;
    color: var(--text-sub);
    border: 0.5px solid var(--line);
    border-radius: 20px;
    padding: 4px 12px;
    margin-bottom: 1.5rem;
  }

  h1 {
    font-size: clamp(2.4rem, 6vw, 4rem);
    font-weight: 600;
    line-height: 1.15;
    letter-spacing: -0.02em;
    margin-bottom: 1.2rem;
  }

  h1 span { color: var(--text-sub); font-weight: 300; }

  .hero-sub {
    font-size: 1.05rem;
    color: var(--text-sub);
    line-height: 1.75;
    max-width: 520px;
    margin-bottom: 2.5rem;
  }

  .cta-row { display: flex; gap: 12px; flex-wrap: wrap; }

  .btn-primary {
    background: var(--text);
    color: var(--bg);
    border: none;
    border-radius: 8px;
    padding: 12px 24px;
    font-family: 'Sora', sans-serif;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: opacity 0.15s;
  }
  .btn-primary:hover { opacity: 0.8; }

  .btn-secondary {
    background: none;
    color: var(--text);
    border: 0.5px solid var(--line);
    border-radius: 8px;
    padding: 12px 24px;
    font-family: 'Sora', sans-serif;
    font-size: 14px;
    cursor: pointer;
    transition: background 0.15s;
  }
  .btn-secondary:hover { background: var(--surface); }

  .section-label {
    font-family: 'DM Mono', monospace;
    font-size: 11px;
    letter-spacing: 0.1em;
    color: var(--text-sub);
    text-transform: uppercase;
    margin-bottom: 2rem;
  }

  h2 {
    font-size: 1.6rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    margin-bottom: 1rem;
  }

  .about-text {
    font-size: 0.95rem;
    color: var(--text-sub);
    line-height: 1.85;
  }

  .section-lead {
    font-size: 0.95rem;
    color: var(--text-sub);
    line-height: 1.8;
    margin-bottom: 1.75rem;
    max-width: 640px;
  }

  .section-lead strong {
    color: var(--text);
    font-weight: 600;
  }

  .ai-section {
    background: var(--surface);
    border-top: 0.5px solid var(--line);
    border-bottom: 0.5px solid var(--line);
    box-shadow: inset 3px 0 0 var(--accent-ai);
  }

  .ai-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 12px;
    margin-bottom: 1.5rem;
  }

  .ai-card {
    background: var(--bg);
    border: 0.5px solid var(--line);
    border-radius: var(--radius);
    padding: 1.25rem 1.35rem;
  }

  .ai-card-icon {
    font-size: 1.35rem;
    color: var(--accent-ai);
    margin-bottom: 0.65rem;
  }

  .ai-card h3 {
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 0.45rem;
  }

  .ai-card p {
    font-size: 0.82rem;
    color: var(--text-sub);
    line-height: 1.65;
  }

  .ai-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.45rem;
    margin-bottom: 1.25rem;
    font-size: 0.88rem;
    color: var(--text-sub);
  }

  .ai-list li::before {
    content: "—";
    margin-right: 0.5rem;
    color: var(--accent-ai);
    font-family: 'DM Mono', monospace;
  }

  .ai-note {
    font-size: 0.85rem;
    color: var(--text-sub);
    line-height: 1.7;
  }

  .ai-note a {
    color: var(--text);
    font-weight: 600;
  }

  .tag-ai {
    background: var(--tag-ai-bg);
    color: var(--tag-ai-text);
    font-family: 'DM Mono', monospace;
    font-size: 11px;
    padding: 3px 9px;
    border-radius: 4px;
  }

  .skill-card.skill-card-ai {
    border-color: rgba(47, 93, 122, 0.25);
  }

  .pricing-card.pricing-ai {
    border-color: rgba(47, 93, 122, 0.35);
  }

  .skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 12px;
    margin-top: 1.5rem;
  }

  .skill-card {
    background: var(--surface);
    border: 0.5px solid var(--line);
    border-radius: var(--radius);
    padding: 1.2rem 1.4rem;
  }

  .skill-card .skill-icon {
    font-size: 20px;
    margin-bottom: 0.7rem;
    color: var(--text-sub);
  }

  .skill-card h3 {
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    letter-spacing: 0.01em;
  }

  .tags { display: flex; flex-wrap: wrap; gap: 6px; }

  .tag {
    background: var(--tag-bg);
    color: var(--tag-text);
    font-family: 'DM Mono', monospace;
    font-size: 11px;
    padding: 3px 9px;
    border-radius: 4px;
  }

  .works-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 12px;
    margin-top: 1.5rem;
  }

  .work-card {
    background: var(--surface);
    border: 0.5px solid var(--line);
    border-radius: var(--radius);
    padding: 1.4rem;
    transition: border-color 0.15s;
  }

  .work-card:hover { border-color: var(--text-sub); }

  .work-num {
    font-family: 'DM Mono', monospace;
    font-size: 11px;
    color: var(--text-sub);
    margin-bottom: 0.8rem;
  }

  .work-card .work-title {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 0;
    line-height: 1.45;
  }

  .work-card .work-desc {
    font-size: 0.82rem;
    color: var(--text-sub);
    line-height: 1.75;
    margin-top: 0.65rem;
  }

  .work-card hr.work-divider {
    border: none;
    border-top: 0.5px solid var(--line);
    margin: 1rem 0 0.65rem;
  }

  .work-tag-block + .work-tag-block { margin-top: 0; }

  .work-tag-label {
    display: block;
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-sub);
    margin-bottom: 0.45rem;
  }

  .tag-feature {
    background: var(--tag-feature-bg);
    color: var(--tag-feature-text);
    font-family: 'Sora', sans-serif;
    font-size: 11px;
    font-weight: 500;
    padding: 3px 9px;
    border-radius: 4px;
  }

  .work-card h3 { font-size: 0.95rem; font-weight: 600; margin-bottom: 0.4rem; }
  .work-card p { font-size: 0.82rem; color: var(--text-sub); line-height: 1.6; }

  .pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 12px;
    margin-top: 1.5rem;
  }

  .pricing-card {
    background: var(--surface);
    border: 0.5px solid var(--line);
    border-radius: var(--radius);
    padding: 1.4rem;
  }

  .pricing-card.featured {
    border-color: var(--text);
    border-width: 1px;
  }

  .pricing-card h3 { font-size: 0.85rem; font-weight: 600; margin-bottom: 0.5rem; }
  .pricing-price {
    font-family: 'DM Mono', monospace;
    font-size: 1.2rem;
    font-weight: 500;
    margin-bottom: 0.8rem;
  }
  .pricing-desc { font-size: 0.8rem; color: var(--text-sub); line-height: 1.65; }

  .contact-form {
    background: var(--surface);
    border: 0.5px solid var(--line);
    border-radius: var(--radius);
    padding: 2rem;
    margin-top: 1.5rem;
    display: grid;
    gap: 16px;
    position: relative;
  }

  .form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
  @media (max-width: 500px) { .form-row { grid-template-columns: 1fr; } }

  .field { display: flex; flex-direction: column; gap: 6px; }

  .field label {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-sub);
    letter-spacing: 0.04em;
  }

  .field input, .field textarea, .field select {
    background: var(--bg);
    border: 0.5px solid var(--line);
    border-radius: 8px;
    padding: 10px 14px;
    font-family: 'Sora', sans-serif;
    font-size: 14px;
    color: var(--text);
    outline: none;
    transition: border-color 0.15s;
    width: 100%;
  }

  .field input:focus, .field textarea:focus, .field select:focus {
    border-color: var(--text-sub);
  }

  .field textarea { resize: vertical; min-height: 100px; }

  .submit-btn {
    background: var(--text);
    color: var(--bg);
    border: none;
    border-radius: 8px;
    padding: 13px;
    font-family: 'Sora', sans-serif;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: opacity 0.15s;
    width: 100%;
  }
  .submit-btn:hover { opacity: 0.8; }
  .submit-btn:disabled {
    opacity: 0.55;
    cursor: not-allowed;
  }

  .hp-field {
    position: absolute;
    left: -9999px;
    width: 1px;
    height: 1px;
    overflow: hidden;
  }

  .form-status {
    font-size: 0.85rem;
    line-height: 1.5;
    min-height: 1.25rem;
    margin: 0;
  }
  .form-status.is-error { color: #b33; }
  .form-status.is-success { color: #2a6b4a; }

  .turnstile-wrap:not([hidden]) {
    min-height: 65px;
  }

  footer {
    text-align: center;
    padding: 2rem;
    font-family: 'DM Mono', monospace;
    font-size: 11px;
    color: var(--text-sub);
    border-top: 0.5px solid var(--line);
  }

  @media (max-width: 720px) {
    .ai-section { box-shadow: inset 0 3px 0 var(--accent-ai); }
  }