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

:root {
  --color-bg: #f9f7f4;
  --color-surface: #ffffff;
  --color-text: #1a1a1a;
  --color-muted: #6b7280;
  --color-accent: #4f46e5;
  --color-accent-light: #ede9fe;
  --color-border: #e5e7eb;
  --font-sans: 'Helvetica Neue', Arial, 'Hiragino Kaku Gothic ProN', sans-serif;
  --max-width: 900px;
}

body {
  font-family: var(--font-sans);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
}

/* ===== Navigation ===== */
.nav {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}

.nav-logo {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-text);
  text-decoration: none;
  letter-spacing: 0.02em;
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  color: var(--color-muted);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s;
}

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

/* ===== Main layout ===== */
main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 3rem 2rem 5rem;
}

/* ===== Hero (index) ===== */
.hero {
  display: flex;
  align-items: center;
  gap: 3rem;
  margin-bottom: 4rem;
  padding: 3rem 0;
  border-bottom: 1px solid var(--color-border);
}

.hero-photo img {
  width: 180px;
  height: 180px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--color-accent-light);
}

.hero-text h1 {
  font-size: 2.2rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 0.4rem;
}

.hero-text .kana {
  font-size: 0.9rem;
  color: var(--color-muted);
  margin-bottom: 0.8rem;
}

.hero-text .tagline {
  font-size: 1.05rem;
  color: var(--color-accent);
  font-weight: 600;
  margin-bottom: 1rem;
}

.hero-text p {
  color: var(--color-muted);
  font-size: 0.95rem;
  max-width: 480px;
}

/* ===== Section ===== */
.section-title {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--color-accent);
  display: inline-block;
}

section {
  margin-bottom: 3.5rem;
}

/* ===== Profile table ===== */
.profile-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

.profile-table tr {
  border-bottom: 1px solid var(--color-border);
}

.profile-table th {
  width: 130px;
  padding: 0.8rem 1rem 0.8rem 0;
  text-align: left;
  color: var(--color-muted);
  font-weight: 600;
  vertical-align: top;
}

.profile-table td {
  padding: 0.8rem 0;
}

/* ===== Skills ===== */
.skill-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.skill-tag {
  background: var(--color-accent-light);
  color: var(--color-accent);
  padding: 0.3rem 0.8rem;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 500;
}

/* ===== Works grid ===== */
.works-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.5rem;
}

.work-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  overflow: hidden;
  transition: box-shadow 0.2s, transform 0.2s;
}

.work-card:hover {
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  transform: translateY(-2px);
}

.work-card img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  display: block;
}

.work-card-body {
  padding: 1rem 1.2rem 1.2rem;
}

.work-card-body h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.3rem;
}

.work-card-body .category {
  font-size: 0.78rem;
  color: var(--color-accent);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.4rem;
}

.work-card-body p {
  font-size: 0.88rem;
  color: var(--color-muted);
}

/* ===== Hobbies ===== */
.hobby-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1rem;
}

.hobby-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: 1.2rem;
  text-align: center;
}

.hobby-card .icon {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

.hobby-card h3 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 0.3rem;
}

.hobby-card p {
  font-size: 0.83rem;
  color: var(--color-muted);
}

/* ===== Contact ===== */
.contact-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
}

.contact-info p {
  color: var(--color-muted);
  font-size: 0.95rem;
  margin-bottom: 1.5rem;
}

.contact-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.contact-links li {
  font-size: 0.95rem;
}

.contact-links .label {
  font-weight: 600;
  color: var(--color-muted);
  font-size: 0.8rem;
  display: block;
  margin-bottom: 0.1rem;
}

.contact-links a {
  color: var(--color-accent);
  text-decoration: none;
}

.contact-links a:hover {
  text-decoration: underline;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.form-group label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-muted);
}

.form-group input,
.form-group textarea {
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 0.7rem 0.9rem;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  background: var(--color-bg);
  color: var(--color-text);
  transition: border-color 0.2s;
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--color-accent);
}

.form-group textarea {
  resize: vertical;
  min-height: 130px;
}

.btn-send {
  background: var(--color-accent);
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 0.75rem 1.5rem;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
  align-self: flex-start;
}

.btn-send:hover {
  background: #4338ca;
}

/* ===== Page header ===== */
.page-header {
  margin-bottom: 2.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--color-border);
}

.page-header h1 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 0.4rem;
}

.page-header p {
  color: var(--color-muted);
  font-size: 0.95rem;
}

/* ===== Footer ===== */
footer {
  text-align: center;
  padding: 2rem;
  font-size: 0.82rem;
  color: var(--color-muted);
  border-top: 1px solid var(--color-border);
  background: var(--color-surface);
}

/* ===== Responsive ===== */
@media (max-width: 640px) {
  .hero {
    flex-direction: column;
    text-align: center;
    gap: 1.5rem;
  }

  .hero-text p {
    max-width: 100%;
  }

  .contact-wrap {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .nav-links {
    gap: 1.2rem;
  }
}