:root {
  --color-primary: #1a5276;
  --color-primary-dark: #123a54;
  --color-accent: #e67e22;
  --color-accent-dark: #cf6d17;
  --color-text: #2c3e50;
  --color-text-light: #5a6c7d;
  --color-bg: #ffffff;
  --color-bg-alt: #f8f9fa;
  --color-bg-dark: #1a2332;
  --color-border: #e2e8f0;
  --color-white: #ffffff;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, sans-serif;
  --font-heading: Georgia, "Times New Roman", serif;
  --max-width: 1200px;
  --max-width-content: 720px;
  --radius: 8px;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-hover: 0 4px 16px rgba(0, 0, 0, 0.12);
  --transition: 0.2s ease;
}

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

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

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

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

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

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

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  color: var(--color-primary-dark);
  line-height: 1.3;
}

/* ── Layout ────────────────────────────────── */

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* ── Navigation ────────────────────────────── */

nav.site-nav {
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

nav.site-nav .nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav-logo {
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--color-primary);
}

.nav-logo:hover {
  color: var(--color-primary-dark);
}

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

.nav-links a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-text);
}

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

.nav-cta {
  background: var(--color-accent);
  color: var(--color-white) !important;
  padding: 0.5rem 1.25rem;
  border-radius: var(--radius);
  font-weight: 600;
}

.nav-cta:hover {
  background: var(--color-accent-dark);
  color: var(--color-white) !important;
}

.hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  margin: 5px 0;
  transition: var(--transition);
}

/* ── Hero ──────────────────────────────────── */

.hero {
  padding: 5rem 1.25rem 4rem;
  text-align: center;
  background: linear-gradient(170deg, var(--color-bg) 60%, var(--color-bg-alt) 100%);
}

.hero h1 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  color: var(--color-primary-dark);
}

.hero p {
  font-size: 1.15rem;
  color: var(--color-text-light);
  max-width: 600px;
  margin: 0 auto 2rem;
}

.btn {
  display: inline-block;
  background: var(--color-accent);
  color: var(--color-white);
  padding: 0.85rem 2rem;
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition);
}

.btn:hover {
  background: var(--color-accent-dark);
  color: var(--color-white);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.btn-outline:hover {
  background: var(--color-primary);
  color: var(--color-white);
}

/* ── Section ───────────────────────────────── */

.section {
  padding: 4rem 1.25rem;
}

.section-alt {
  background: var(--color-bg-alt);
}

.section-dark {
  background: var(--color-bg-dark);
  color: var(--color-white);
}

.section-dark h2 {
  color: var(--color-white);
}

.section-dark p {
  color: #b0bec5;
}

.section-header {
  text-align: center;
  margin-bottom: 2.5rem;
}

.section-header h2 {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

.section-header p {
  color: var(--color-text-light);
  font-size: 1.05rem;
}

/* ── Feature Cards ─────────────────────────── */

.features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  max-width: var(--max-width);
  margin: 0 auto;
}

.feature-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 2rem 1.5rem;
  transition: box-shadow var(--transition), transform var(--transition);
}

.feature-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.feature-icon {
  font-size: 2rem;
  margin-bottom: 0.75rem;
}

.feature-card h3 {
  font-family: var(--font-body);
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--color-primary-dark);
}

.feature-card p {
  font-size: 0.95rem;
  color: var(--color-text-light);
}

/* ── Post Cards ────────────────────────────── */

.posts-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  max-width: var(--max-width);
  margin: 0 auto;
}

.post-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.75rem 1.5rem;
  transition: box-shadow var(--transition), transform var(--transition);
}

.post-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.post-card .post-category {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-accent);
  margin-bottom: 0.5rem;
}

.post-card h3 {
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
}

.post-card h3 a {
  color: var(--color-primary-dark);
}

.post-card h3 a:hover {
  color: var(--color-accent);
}

.post-card .post-excerpt {
  font-size: 0.93rem;
  color: var(--color-text-light);
  margin-bottom: 0.75rem;
}

.post-card .post-meta {
  font-size: 0.82rem;
  color: var(--color-text-light);
}

/* ── Blog Post ─────────────────────────────── */

.blog-post {
  padding-top: 2rem;
  padding-bottom: 3rem;
}

.breadcrumb {
  font-size: 0.85rem;
  color: var(--color-text-light);
  margin-bottom: 2rem;
}

.breadcrumb a {
  color: var(--color-primary);
}

.breadcrumb span {
  margin: 0 0.35rem;
}

.post-header {
  margin-bottom: 2.5rem;
  text-align: center;
}

.post-header h1 {
  font-size: 2.2rem;
  margin-bottom: 0.75rem;
}

.post-header .post-meta {
  font-size: 0.9rem;
  color: var(--color-text-light);
}

.post-header .post-meta span + span {
  margin-left: 0.15rem;
}

.post-content {
  max-width: var(--max-width-content);
  margin: 0 auto;
}

.post-content h2 {
  font-size: 1.6rem;
  margin: 2.5rem 0 1rem;
}

.post-content h3 {
  font-size: 1.25rem;
  margin: 2rem 0 0.75rem;
}

.post-content p {
  margin-bottom: 1.25rem;
}

.post-content strong {
  color: var(--color-primary-dark);
}

.post-content ul,
.post-content ol {
  margin: 0 0 1.25rem 1.5rem;
}

.post-content li {
  margin-bottom: 0.5rem;
}

.post-content a {
  color: var(--color-accent);
  text-decoration: underline;
}

.post-content a:hover {
  color: var(--color-accent-dark);
}

.sources {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
}

.sources h3 {
  font-size: 1.1rem;
  margin-bottom: 0.75rem;
}

.sources ul {
  list-style: none;
  margin-left: 0;
}

.sources li {
  font-size: 0.9rem;
  margin-bottom: 0.4rem;
}

/* ── Post Navigation ───────────────────────── */

.post-navigation {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
}

.post-navigation a {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  padding: 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  max-width: 48%;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.post-navigation a:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow);
}

.post-navigation a span:first-child {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-light);
}

.post-nav-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-primary);
}

.next-post {
  margin-left: auto;
  text-align: right;
}

/* ── Mailing List ──────────────────────────── */

.mailing-list {
  text-align: center;
}

.mailing-list h2 {
  margin-bottom: 0.5rem;
}

.mailing-list p {
  margin-bottom: 1.5rem;
}

.mailing-form {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  max-width: 440px;
  margin: 0 auto;
}

.mailing-form input[type="email"] {
  padding: 0.85rem 1rem;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.1);
  color: var(--color-white);
  font-size: 1rem;
  font-family: var(--font-body);
}

.mailing-form input[type="email"]::placeholder {
  color: #90a4ae;
}

.mailing-form input[type="email"]:focus {
  outline: none;
  border-color: var(--color-accent);
}

.mailing-form .btn {
  width: 100%;
}

/* ── Footer ────────────────────────────────── */

footer {
  background: var(--color-bg-dark);
  color: #90a4ae;
  padding: 2.5rem 1.25rem;
  text-align: center;
  font-size: 0.88rem;
}

footer a {
  color: #b0bec5;
}

footer a:hover {
  color: var(--color-accent);
}

footer .footer-links {
  margin-bottom: 1rem;
}

footer .footer-links a + a {
  margin-left: 1.5rem;
}

footer .disclaimer {
  font-size: 0.78rem;
  color: #607d8b;
  margin-top: 1rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* ── Blog Listing ──────────────────────────── */

.blog-listing {
  padding: 3rem 0;
}

.blog-listing-header {
  text-align: center;
  margin-bottom: 2.5rem;
}

.blog-listing-header h1 {
  font-size: 2.2rem;
  margin-bottom: 0.5rem;
}

.blog-listing-header p {
  color: var(--color-text-light);
  font-size: 1.05rem;
}

/* ── View All Link ─────────────────────────── */

.view-all {
  text-align: center;
  margin-top: 2rem;
}

/* ── Responsive ────────────────────────────── */

@media (min-width: 640px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .mailing-form {
    flex-direction: row;
  }

  .mailing-form input[type="email"] {
    flex: 1;
  }

  .mailing-form .btn {
    width: auto;
  }
}

@media (min-width: 768px) {
  .hero h1 {
    font-size: 3rem;
  }

  .post-header h1 {
    font-size: 2.5rem;
  }
}

@media (min-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .posts-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .hamburger {
    display: none !important;
  }

  .nav-links {
    display: flex !important;
  }
}

@media (max-width: 1023px) {
  .hamburger {
    display: block;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--color-white);
    flex-direction: column;
    padding: 1rem 1.25rem;
    gap: 0;
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow);
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links li {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--color-border);
  }

  .nav-links li:last-child {
    border-bottom: none;
    padding-top: 1rem;
  }

  .nav-cta {
    text-align: center;
    display: block;
  }
}