/* ========== RESET & BASE ========== */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg: #faf9f7;
  --text: #1a1a1a;
  --text-light: #6b6b6b;
  --accent: #c45d3e;
  --card-bg: #ffffff;
  --card-border: #e8e6e3;
  --card-hover: #f5f3f0;
  --tag-bg: #f0ece7;
  --font-display: 'Instrument Serif', Georgia, serif;
  --font-body: 'DM Sans', sans-serif;
}

html {
  scroll-behavior: smooth;
}

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

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

/* ========== HEADER ========== */
.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem 2.5rem;
  max-width: 900px;
  width: 100%;
  margin: 0 auto;
}

.logo {
  font-family: var(--font-body);
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text);
}

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

nav {
  display: flex;
  gap: 2rem;
}

nav a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-light);
  position: relative;
  transition: color 0.3s ease;
}

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

nav a.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--accent);
  border-radius: 1px;
}

/* ========== MAIN ========== */
main {
  max-width: 900px;
  width: 100%;
  margin: 0 auto;
  padding: 0 2.5rem;
  flex: 1;
}

/* ========== HERO ========== */
.hero {
  padding: 4rem 0 3rem;
  border-bottom: 1px solid var(--card-border);
  margin-bottom: 3rem;
}

.hero-label {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  margin-bottom: 1rem;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: 3.2rem;
  font-weight: 400;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--text);
}

.hero h1 em {
  font-style: italic;
  color: var(--accent);
}

/* ========== POST CARDS ========== */
.posts {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding-bottom: 4rem;
}

.post-card {
  display: block;
  padding: 2rem;
  border: 1px solid var(--card-border);
  border-radius: 12px;
  background: var(--card-bg);
  transition: all 0.3s ease;
  cursor: pointer;
}

.post-card:hover {
  background: var(--card-hover);
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
}

.post-date {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-light);
  letter-spacing: 0.02em;
}

.post-card h2 {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 400;
  margin: 0.5rem 0;
  letter-spacing: -0.01em;
  line-height: 1.3;
}

.post-card p {
  font-size: 0.95rem;
  color: var(--text-light);
  line-height: 1.6;
  margin-bottom: 1rem;
}

.post-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.3rem 0.8rem;
  background: var(--tag-bg);
  border-radius: 20px;
  color: var(--accent);
}

/* ========== FOOTER ========== */
footer {
  text-align: center;
  padding: 2rem 2.5rem;
  border-top: 1px solid var(--card-border);
  max-width: 900px;
  width: 100%;
  margin: 0 auto;
}

footer p {
  font-size: 0.85rem;
  color: var(--text-light);
}

/* ========== POST PAGE ========== */
.post-header {
  padding: 4rem 0 2rem;
}

.post-header .post-date {
  margin-bottom: 0.5rem;
  display: block;
}

.post-header h1 {
  font-family: var(--font-display);
  font-size: 2.8rem;
  font-weight: 400;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.post-content {
  padding-bottom: 4rem;
}

.post-content p {
  font-size: 1.05rem;
  color: var(--text);
  line-height: 1.85;
  margin-bottom: 1.5rem;
}

.post-content h2 {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 400;
  margin: 2.5rem 0 1rem;
}

.post-content blockquote {
  border-left: 3px solid var(--accent);
  padding: 0.5rem 1.5rem;
  margin: 2rem 0;
  font-style: italic;
  color: var(--text-light);
  font-size: 1.1rem;
}

.post-content code {
  font-family: 'Courier New', monospace;
  background: var(--tag-bg);
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  font-size: 0.9rem;
}

.post-content pre {
  background: var(--text);
  color: var(--bg);
  padding: 1.5rem;
  border-radius: 12px;
  overflow-x: auto;
  margin: 2rem 0;
  line-height: 1.5;
}

.post-content pre code {
  background: none;
  padding: 0;
  color: inherit;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--accent);
  margin-bottom: 1rem;
  transition: gap 0.3s ease;
}

.back-link:hover {
  gap: 0.7rem;
}

/* ========== RESPONSIVE ========== */
@media (max-width: 600px) {
  .header {
    padding: 1.2rem 1.5rem;
  }

  nav {
    gap: 1.2rem;
  }

  main {
    padding: 0 1.5rem;
  }

  .hero {
    padding: 2.5rem 0 2rem;
    margin-bottom: 2rem;
  }

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

  .post-card {
    padding: 1.5rem;
  }

  .post-card h2 {
    font-size: 1.3rem;
  }

  .post-header h1 {
    font-size: 2rem;
  }

  footer {
    padding: 1.5rem;
  }
}