@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;0,9..40,700;0,9..40,800;0,9..40,900;1,9..40,400&family=DM+Mono:wght@400;500&display=swap');

:root {
  --bg:         #0a0a0a;
  --bg-2:       #111111;
  --bg-3:       #1a1a1a;
  --text:       #f0f0f0;
  --text-2:     #a0a0a0;
  --text-3:     #555555;
  --accent:     #1ed760;
  --accent-dim: rgba(30, 215, 96, 0.12);
  --border:     rgba(255, 255, 255, 0.08);
  --border-2:   rgba(255, 255, 255, 0.14);

  --font-display: 'DM Sans', system-ui, sans-serif;
  --font-mono:    'DM Mono', monospace;

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;

  --transition: 0.2s ease;
}

[data-theme="light"] {
  --bg:         #fafafa;
  --bg-2:       #f2f2f2;
  --bg-3:       #e8e8e8;
  --text:       #0a0a0a;
  --text-2:     #555555;
  --text-3:     #999999;
  --accent:     #16a34a;
  --accent-dim: rgba(22, 163, 74, 0.10);
  --border:     rgba(0, 0, 0, 0.08);
  --border-2:   rgba(0, 0, 0, 0.14);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-display);
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition: background var(--transition), color var(--transition);
  min-height: 100vh;
}

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

img {
  display: block;
}

.container {
  max-width: 680px;
  margin: 0 auto;
  padding: 80px 24px 48px;
}

.theme-toggle {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 100;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--border-2);
  background: var(--bg-2);
  color: var(--text-2);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color var(--transition), background var(--transition), color var(--transition);
  font-size: 16px;
}

.theme-icon {
  display: inline-flex;
  width: 1.2em;
  height: 1.2em;
  align-items: center;
  justify-content: center;
  line-height: 1;
  font-size: 1.2em;
  font-weight: 700;
}

.theme-toggle:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
}

.avatar {
  width: 83px;
  height: 83px;
  border-radius: 50%;
  border: 2px solid var(--border-2);
  margin-bottom: 28px;
  object-fit: cover;
  transition: box-shadow 0.25s ease, transform 0.25s ease;
}

.avatar:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 0 4px rgba(30, 215, 96, 0.65),
              inset 0 0 0 1px rgba(30, 215, 96, 0.5);
}

.hero h1 {
  font-size: clamp(2.6rem, 8vw, 4rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.05;
  color: var(--text);
  margin-bottom: 10px;
}

.subtitle {
  font-size: 0.95rem;
  font-family: var(--font-mono);
  color: var(--accent);
  font-weight: 500;
  letter-spacing: 0.01em;
  margin-bottom: 28px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.subtitle::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
}

.bio {
  font-size: 1rem;
  color: var(--text-2);
  line-height: 1.75;
  margin-bottom: 16px;
  font-weight: 400;
}

.bio a {
  color: var(--text);
  border-bottom: 1px solid var(--border-2);
  transition: border-color var(--transition), color var(--transition);
}

.bio a:hover {
  color: var(--accent);
  border-color: var(--accent);
}

.links {
  margin-top: 36px;
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.links a {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-2);
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-2);
  transition: all var(--transition);
  letter-spacing: 0.01em;
}

.links a:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-dim);
}

.divider {
  width: 100%;
  height: 1px;
  background: var(--border);
  margin: 48px 0;
}

section {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.section-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: 24px;
}

.blog-preview {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.blog-preview-item {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
  transition: color var(--transition);
}

.blog-preview-item:last-child {
  border-bottom: none;
}

.blog-preview-item:hover .post-title {
  color: var(--accent);
}

.post-title {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text);
  transition: color var(--transition);
  flex: 1;
}

.post-date {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-3);
  white-space: nowrap;
  flex-shrink: 0;
}

.view-all {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: 20px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--accent);
  transition: gap var(--transition);
}

.view-all:hover {
  gap: 8px;
}

footer {
  margin-top: 64px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-3);
}

footer.footer-centered {
  justify-content: center;
}

.page-header {
  margin-bottom: 48px;
}

.page-header h1 {
  font-size: clamp(2rem, 6vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 8px;
}

.page-header p {
  color: var(--text-2);
  font-size: 0.95rem;
}

.post-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.post-item {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  padding: 20px 0;
  border-bottom: 1px solid var(--border);
  transition: all var(--transition);
}

.post-item:first-child {
  border-top: 1px solid var(--border);
}

.post-item:hover .post-item-title {
  color: var(--accent);
}

.post-item-meta {
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex: 1;
}

.post-item-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  transition: color var(--transition);
}

.post-item-desc {
  font-size: 0.875rem;
  color: var(--text-2);
  line-height: 1.5;
}

.post-item-date {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-3);
  white-space: nowrap;
  padding-top: 4px;
  flex-shrink: 0;
}

.post-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 2px 8px;
  border-radius: 100px;
  background: var(--accent-dim);
  color: var(--accent);
  font-weight: 500;
  letter-spacing: 0.04em;
}

.contact-grid {
  display: grid;
  gap: 40px;
}

.contact-intro {
  font-size: 1rem;
  color: var(--text-2);
  line-height: 1.75;
}

.social-links {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
  transition: color var(--transition);
}

.social-link:first-child {
  border-top: 1px solid var(--border);
}

.social-link:hover .social-name {
  color: var(--accent);
}

.social-link:hover .social-arrow {
  transform: translateX(4px);
}

.social-name {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text);
  transition: color var(--transition);
}

.social-handle {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-3);
}

.social-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.social-arrow {
  color: var(--text-3);
  transition: transform var(--transition);
  font-size: 0.85rem;
}

/* Contact Form */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

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

.form-group label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-3);
}

.form-group input,
.form-group textarea {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  font-family: var(--font-display);
  font-size: 0.95rem;
  color: var(--text);
  outline: none;
  transition: border-color var(--transition);
  resize: none;
  width: 100%;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-3);
}

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

.form-submit {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  background: var(--accent);
  color: #0a0a0a;
  border: none;
  border-radius: var(--radius-sm);
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 700;
  cursor: pointer;
  transition: opacity var(--transition), transform var(--transition);
  align-self: flex-start;
}

.form-submit:hover {
  opacity: 0.88;
  transform: translateY(-1px);
}

.form-submit:active {
  transform: translateY(0);
}

.field-error {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: #f87171;
  margin-top: 2px;
}

[aria-invalid="true"] {
  border-color: #f87171 !important;
}

.site-nav {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 100;
  display: flex;
  align-items: center;
  gap: 2px;
  background: var(--bg-2);
  border: 1px solid var(--border-2);
  border-radius: 100px;
  padding: 4px;
}

.nav-link {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-2);
  padding: 6px 14px;
  border-radius: 100px;
  transition: all var(--transition);
}

.nav-link:hover,
.nav-link.active {
  background: var(--bg-3);
  color: var(--text);
}

.nav-link.active {
  color: var(--accent);
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-3);
  margin-bottom: 40px;
  transition: color var(--transition);
}

.back-link:hover {
  color: var(--text);
}

.empty-state {
  padding: 48px 0;
  color: var(--text-3);
  font-family: var(--font-mono);
  font-size: 0.875rem;
}

@media (max-width: 600px) {
  .container {
    padding: 72px 20px 40px;
  }

  .hero h1 {
    font-size: 2.4rem;
  }

  .post-item {
    flex-direction: column;
    gap: 8px;
  }

  .post-item-date {
    padding-top: 0;
  }

  footer {
    flex-direction: column;
    gap: 4px;
  }

  .site-nav {
    top: 12px;
  }
}

@media (prefers-reduced-motion: no-preference) {
  ::view-transition-old(root),
  ::view-transition-new(root) {
    animation-duration: 0.25s;
  }
}