:root {
  --bg: #ffffff;
  --text: #1a1a1a;
  --muted: #5c5c5c;
  --orange: #ff7a00;
  --green: #198754;
  --surface: #f8faf8;
  --border: #ececec;
}

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

body {
  font-family: "Barlow", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

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

.container {
  width: min(1120px, 92%);
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: #ffffffee;
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(6px);
}

.header-wrap {
  min-height: 78px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  color: var(--text);
  font-weight: 800;
  font-size: 1.1rem;
}

.brand img {
  width: 42px;
  height: 42px;
  object-fit: contain;
}

.main-nav {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.main-nav a {
  text-decoration: none;
  color: var(--text);
  font-weight: 600;
  padding: 0.3rem 0.5rem;
  border-radius: 6px;
}

.main-nav a:hover {
  color: var(--orange);
}

.hero {
  padding: 4rem 0 3rem;
  background:
    radial-gradient(circle at 10% 20%, #fff1e4, transparent 45%),
    radial-gradient(circle at 80% 10%, #e9fff2, transparent 45%),
    #ffffff;
}

.hero-content {
  max-width: 760px;
}

.tag {
  display: inline-block;
  padding: 0.25rem 0.65rem;
  border-radius: 999px;
  background: var(--green);
  color: #fff;
  font-size: 0.85rem;
  font-weight: 700;
  margin-bottom: 0.8rem;
}

.hero h1 {
  font-size: clamp(1.9rem, 4vw, 3.2rem);
  line-height: 1.15;
  margin-bottom: 0.8rem;
}

.hero p {
  color: var(--muted);
  font-size: 1.05rem;
}

.blog-section {
  padding: 2.5rem 0 3.5rem;
}

.section-head {
  margin-bottom: 1.4rem;
}

.section-head h2 {
  font-size: clamp(1.55rem, 3vw, 2.2rem);
  color: var(--orange);
}

.section-head p {
  color: var(--muted);
}

.posts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.1rem;
}

.post-card-link {
  text-decoration: none;
  color: inherit;
  display: block;
}

.post-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.post-card-link:hover .post-card,
.post-card-link:focus-visible .post-card {
  transform: translateY(-3px);
  box-shadow: 0 8px 20px #00000010;
}

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

.post-body {
  padding: 0.9rem 1rem 1.1rem;
}

.post-category {
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  font-weight: 700;
  color: var(--green);
  text-transform: uppercase;
}

.post-body h3 {
  margin: 0.3rem 0 0.55rem;
  line-height: 1.2;
  font-size: 1.16rem;
}

.post-link {
  color: inherit;
  text-decoration: none;
}

.post-link:hover {
  color: var(--orange);
}

.post-body p {
  color: var(--muted);
  font-size: 0.97rem;
}

.about {
  padding: 0 0 3.2rem;
}

.about h2 {
  color: var(--green);
  margin-bottom: 0.4rem;
}

.about p {
  max-width: 750px;
  color: var(--muted);
}

.site-footer {
  border-top: 2px solid var(--orange);
  background: #fefefe;
  padding: 1.6rem 0 1.1rem;
}

.footer-wrap {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.site-footer h3 {
  color: var(--orange);
}

.site-footer p {
  color: #3f3f3f;
}

.copy {
  margin-top: 0.8rem;
  text-align: center;
  font-size: 0.9rem;
}

.not-found {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 1.4rem;
  background:
    radial-gradient(circle at 90% 5%, #e7fff1, transparent 35%),
    radial-gradient(circle at 10% 90%, #fff0dd, transparent 35%),
    #ffffff;
}

.not-found-box {
  text-align: center;
  border: 1px solid var(--border);
  background: #fff;
  border-radius: 16px;
  padding: 2rem 1.4rem;
  max-width: 520px;
  width: 100%;
}

.not-found-box img {
  width: 92px;
  margin: 0 auto 1rem;
}

.not-found-box h1 {
  color: var(--orange);
  margin-bottom: 0.35rem;
}

.not-found-box p {
  color: var(--muted);
}

.not-found-box a {
  margin-top: 1rem;
  display: inline-block;
  background: var(--green);
  color: #fff;
  text-decoration: none;
  padding: 0.6rem 1rem;
  border-radius: 8px;
  font-weight: 600;
}

.article-page {
  padding: 2.4rem 0 3rem;
}

.article-card {
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  background: #fff;
}

.article-cover {
  width: 100%;
  height: clamp(220px, 38vw, 420px);
  object-fit: cover;
}

.article-content {
  padding: 1.1rem 1.2rem 1.5rem;
}

.article-content h1 {
  margin: 0.35rem 0 0.8rem;
  line-height: 1.15;
  font-size: clamp(1.6rem, 3.8vw, 2.6rem);
}

.article-content p + p {
  margin-top: 0.7rem;
}

.article-content h2 {
  margin-top: 1.2rem;
  color: var(--orange);
  font-size: clamp(1.25rem, 2.6vw, 1.7rem);
  line-height: 1.2;
}

.article-content h3 {
  margin-top: 0.9rem;
  color: var(--green);
  font-size: clamp(1.05rem, 2.2vw, 1.2rem);
  line-height: 1.25;
}

.article-content ul {
  margin-top: 0.65rem;
  padding-left: 1.2rem;
}

.article-content li + li {
  margin-top: 0.35rem;
}

@media (max-width: 700px) {
  .header-wrap {
    padding: 0.55rem 0;
    align-items: flex-start;
    flex-direction: column;
  }

  .main-nav {
    width: 100%;
    gap: 0.55rem;
  }

  .main-nav a {
    padding-left: 0;
  }
}