/* Base typography */
:root {
  --primary: #04253a;
  --primary-dark: #021729;
  --accent: #ffffff;
  --text: #202327;
  --muted: #5e5e5e;
  --bg: #f7f8fb;
  --card: #ffffff;
  --border: rgba(155, 155, 155, 0.15);
  --shadow: 0 12px 30px rgba(4, 37, 58, 0.08);
  --radius: 8px;
  --transition: 0.17s ease;
  font-size: 16px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}

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

a:hover {
  color: var(--primary-dark);
}

header,
main,
footer {
  width: 100%;
}

.page-shell {
  max-width: 880px;
  margin: 0 auto;
  padding: 40px 20px;
}

.site-header {
  text-align: center;
  margin-bottom: 35px;
}

.site-header h1 {
  margin: 0;
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: -0.02em;
}

.site-header p {
  margin: 8px 0 0;
  color: var(--muted);
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow);
}

.card + .card {
  margin-top: 30px;
}

article h1,
article h2,
article h3,
article h4,
article h5 {
  color: var(--primary);
  line-height: 1.3;
  margin: 0 0 18px;
  font-weight: 600;
}

article p {
  margin: 0 0 18px;
}

article ul,
article ol {
  margin: 0 0 20px;
  padding-left: 22px;
}

article li {
  margin-bottom: 8px;
}

blockquote {
  margin: 24px 0;
  padding: 18px 20px;
  border-left: 4px solid var(--primary);
  background: rgba(4, 37, 58, 0.05);
  color: var(--primary);
  font-style: italic;
}

.button,
button,
input[type="submit"],
input[type="button"],
input[type="reset"] {
  display: inline-block;
  padding: 10px 22px;
  background: var(--primary);
  color: var(--accent);
  border: 1px solid var(--primary);
  border-radius: 999px;
  font-weight: 600;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition);
}

.button:hover,
button:hover,
input[type="submit"]:hover,
input[type="button"]:hover,
input[type="reset"]:hover {
  background: var(--accent);
  color: var(--primary);
  transform: translateY(-1px);
}

form {
  display: grid;
  gap: 14px;
  margin: 20px 0;
}

label {
  font-weight: 600;
  color: var(--primary);
}

input,
textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: #ffffff;
  font: inherit;
  color: var(--text);
  transition: border var(--transition), box-shadow var(--transition);
}

input:focus,
textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(4, 37, 58, 0.15);
}

footer {
  margin-top: 60px;
  text-align: center;
  color: var(--muted);
}

footer a {
  color: var(--primary);
  font-weight: 600;
}

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

/* Utility sections on archive pages */
.archive-list article {
  border-bottom: 1px solid var(--border);
  padding: 20px 0;
}

.archive-list article:last-child {
  border-bottom: none;
}

.archive-list h2 {
  margin-bottom: 6px;
  font-size: 1.4rem;
}

.archive-list p {
  margin: 0;
  color: var(--muted);
}

/* Responsive tweaks */
@media (max-width: 680px) {
  .page-shell {
    padding: 30px 18px;
  }

  .card {
    padding: 26px;
  }

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

@media (max-width: 480px) {
  :root {
    font-size: 15px;
  }

  .card {
    padding: 22px;
  }

  blockquote {
    padding: 16px 18px;
  }
}