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

:root {
  --color-bg: #fafaf8;
  --color-surface: #ffffff;
  --color-text: #1a1a1a;
  --color-muted: #6b7280;
  --color-accent: #3b6ceb;
  --color-accent-light: #eef2ff;
  --color-border: #e5e7eb;
  --font-sans: 'Inter', 'Hiragino Sans', 'Helvetica Neue', Arial, sans-serif;
  --max-width: 900px;
  --radius: 12px;
  --shadow: 0 2px 16px rgba(0, 0, 0, 0.07);
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

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

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

a:hover {
  text-decoration: underline;
}

img {
  display: block;
  max-width: 100%;
}

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

main {
  flex: 1;
}

/* Navigation */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250, 250, 248, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
}

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

.nav-logo {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--color-text);
  letter-spacing: -0.5px;
}

.nav-logo:hover {
  text-decoration: none;
  color: var(--color-accent);
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 8px;
}

.nav-links a {
  display: inline-block;
  padding: 6px 14px;
  border-radius: 99px;
  color: var(--color-muted);
  font-size: 0.9rem;
  font-weight: 500;
  transition: background 0.15s, color 0.15s;
}

.nav-links a:hover,
.nav-links a.active {
  background: var(--color-accent-light);
  color: var(--color-accent);
  text-decoration: none;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 28px 24px;
  text-align: center;
  color: var(--color-muted);
  font-size: 0.85rem;
}

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

.hero-inner {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 48px;
  align-items: center;
}

.hero-badge {
  display: inline-block;
  background: var(--color-accent-light);
  color: var(--color-accent);
  font-size: 0.8rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 99px;
  margin-bottom: 16px;
  letter-spacing: 0.5px;
}

.hero h1 {
  font-size: 2.6rem;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -1px;
  margin-bottom: 16px;
}

.hero h1 span {
  color: var(--color-accent);
}

.hero-desc {
  color: var(--color-muted);
  font-size: 1.05rem;
  margin-bottom: 28px;
  max-width: 460px;
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 22px;
  border-radius: 99px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: opacity 0.15s, transform 0.15s;
}

.btn:hover {
  opacity: 0.85;
  transform: translateY(-1px);
  text-decoration: none;
}

.btn-primary {
  background: var(--color-accent);
  color: #fff;
}

.btn-outline {
  background: transparent;
  color: var(--color-text);
  border: 1.5px solid var(--color-border);
}

.hero-avatar {
  border-radius: 50%;
  width: 180px;
  height: 180px;
  object-fit: cover;
  box-shadow: var(--shadow);
}

/* Section */
.section {
  padding: 64px 0;
}

.section-label {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 8px;
}

.section-title {
  font-size: 1.8rem;
  font-weight: 700;
  letter-spacing: -0.5px;
  margin-bottom: 12px;
}

.section-desc {
  color: var(--color-muted);
  max-width: 520px;
  margin-bottom: 40px;
}

/* About cards */
.about-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
  margin-top: 8px;
}

.about-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
}

.about-card-icon {
  font-size: 1.6rem;
  margin-bottom: 12px;
}

.about-card h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.about-card p {
  font-size: 0.9rem;
  color: var(--color-muted);
}

/* Skills */
.skills-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 8px;
}

.skill-tag {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 99px;
  padding: 6px 16px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-text);
}

/* Works page */
.page-header {
  padding: 60px 0 40px;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 52px;
}

.page-header h1 {
  font-size: 2.2rem;
  font-weight: 800;
  letter-spacing: -0.8px;
  margin-bottom: 10px;
}

.page-header p {
  color: var(--color-muted);
  font-size: 1rem;
  max-width: 480px;
}

.works-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 24px;
  margin-bottom: 64px;
}

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

.work-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.1);
}

.work-card img {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
}

.work-card-body {
  padding: 18px 20px 20px;
}

.work-card-tag {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 6px;
}

.work-card h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.work-card p {
  font-size: 0.85rem;
  color: var(--color-muted);
}

/* Hobbies */
.hobby-section {
  margin-bottom: 56px;
}

.hobby-section h2 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.hobby-photo-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.hobby-photo-grid img {
  border-radius: 8px;
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
}

/* Contact page */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 56px;
  align-items: start;
  padding-bottom: 72px;
}

.contact-info h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.contact-info p {
  color: var(--color-muted);
  margin-bottom: 28px;
  font-size: 0.95rem;
}

.contact-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.contact-links li a {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--color-text);
  font-weight: 500;
}

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

.contact-icon {
  width: 36px;
  height: 36px;
  background: var(--color-accent-light);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  flex-shrink: 0;
}

/* Form */
.contact-form {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow);
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--color-text);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1.5px solid var(--color-border);
  border-radius: 8px;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  background: var(--color-bg);
  color: var(--color-text);
  transition: border-color 0.15s;
  outline: none;
}

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

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

.btn-submit {
  width: 100%;
  justify-content: center;
  padding: 12px;
  font-size: 0.95rem;
}

/* Divider */
.divider {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: 48px 0;
}

/* Responsive */
@media (max-width: 680px) {
  .hero-inner {
    grid-template-columns: 1fr;
  }

  .hero-avatar {
    display: none;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .contact-layout {
    grid-template-columns: 1fr;
  }

  .hobby-photo-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .nav-links a {
    padding: 6px 10px;
  }
}