/* Katela Kernel — styled after the visual language of archlinux.org */

:root {
  --katela-blue: #1793d1;
  --katela-blue-dark: #0f4e6e;
  --katela-dark: #222629;
  --katela-darker: #101214;
  --text-body: #333;
  --text-muted: #666;
  --border-grey: #d9dbdd;
  --bg-body: #ffffff;
  --bg-box: #f5f6f7;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
}

body {
  font-family: "Liberation Sans", "Helvetica Neue", Arial, sans-serif;
  color: var(--text-body);
  background: var(--bg-body);
  font-size: 15px;
  line-height: 1.6;
}

a {
  color: var(--katela-blue-dark);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.wrap {
  max-width: 1050px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Top bar */
#topbar {
  background: var(--katela-darker);
  color: #9aa0a6;
  font-size: 12px;
}

#topbar .wrap {
  display: flex;
  justify-content: flex-end;
  padding-top: 4px;
  padding-bottom: 4px;
}

.topbar-text {
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: #808790;
}

/* Header */
#site-header {
  background: var(--katela-dark);
  border-bottom: 3px solid var(--katela-blue);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  padding-bottom: 14px;
  flex-wrap: wrap;
}

.logo-link {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.logo-link:hover {
  text-decoration: none;
}

#logo {
  height: 48px;
  width: auto;
  display: block;
}

.site-title {
  font-size: 24px;
  font-weight: 700;
  color: #ffffff;
  letter-spacing: 0.02em;
}

#main-nav ul {
  list-style: none;
  display: flex;
  gap: 26px;
  margin: 0;
  padding: 0;
}

#main-nav a {
  color: #d5d8db;
  font-size: 14px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 6px 2px;
  border-bottom: 2px solid transparent;
  transition: color 0.15s ease, border-color 0.15s ease;
}

#main-nav a:hover {
  color: #ffffff;
  border-bottom-color: var(--katela-blue);
  text-decoration: none;
}

/* Tagline strip */
#tagline {
  background: var(--katela-blue);
}

#tagline p {
  margin: 0;
  padding: 10px 0;
  color: #ffffff;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-align: center;
}

/* Content layout */
.content-columns {
  display: flex;
  gap: 24px;
  align-items: flex-start;
  padding-top: 28px;
  padding-bottom: 40px;
}

.main-column {
  flex: 1 1 auto;
  min-width: 0;
}

.side-column {
  flex: 0 0 260px;
}

.box {
  background: var(--bg-box);
  border: 1px solid var(--border-grey);
  border-radius: 3px;
  padding: 20px 22px;
  margin-bottom: 22px;
}

.box h2 {
  margin-top: 0;
  margin-bottom: 12px;
  font-size: 19px;
  color: var(--katela-blue-dark);
  border-bottom: 2px solid var(--katela-blue);
  padding-bottom: 8px;
}

.box h3 {
  margin-top: 0;
  margin-bottom: 10px;
  font-size: 15px;
  color: var(--katela-blue-dark);
  border-bottom: 1px solid var(--border-grey);
  padding-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.box p {
  margin: 0 0 12px 0;
  color: var(--text-body);
}

.box p:last-child {
  margin-bottom: 0;
}

.news-entry p {
  margin-bottom: 14px;
}

.side-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.side-list li {
  padding: 6px 0;
  border-bottom: 1px solid var(--border-grey);
  font-size: 14px;
}

.side-list li:last-child {
  border-bottom: none;
}

.side-list.plain li {
  color: var(--text-muted);
}

.side-note {
  color: var(--text-muted);
  font-size: 14px;
}

/* Footer */
#site-footer {
  background: var(--katela-dark);
  color: #9aa0a6;
  font-size: 13px;
}

#site-footer .wrap {
  padding: 18px 20px;
  text-align: center;
}

/* Responsive */
@media (max-width: 760px) {
  .content-columns {
    flex-direction: column;
  }

  .side-column {
    flex: 1 1 auto;
    width: 100%;
  }

  .header-inner {
    justify-content: center;
    text-align: center;
  }

  #main-nav ul {
    justify-content: center;
    flex-wrap: wrap;
    gap: 16px;
  }
}