/* =========================================================================
   ISOCTA Modern — Institutional Facade
   HTML5 / CSS3 — Dark, minimal, responsive
   ========================================================================= */

:root {
  --bg:           #16161a;
  --surface:      #1e1e24;
  --surface-alt:  #25252c;
  --border:       #2e2e38;
  --border-light: #393946;
  --text:         #c4c4cc;
  --text-muted:   #7a7a88;
  --text-dim:     #545460;
  --accent:       #7089a4;
  --accent-hover: #8ca3be;
  --accent-dim:   #3d4d5c;
  --warn:         #a08a5a;

  --font-sans:  -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
                Helvetica, Arial, sans-serif, "Apple Color Emoji";
  --font-mono:  "SF Mono", "Fira Code", "Fira Mono", "Roboto Mono",
                Consolas, "Liberation Mono", Menlo, Courier, monospace;

  --max-width:  720px;
  --radius:     2px;
}

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

html {
  font-size: 17px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
}

/* ---- skip link ---- */
.skip-link {
  position: absolute;
  top: -100px;
  left: 8px;
  padding: 8px 16px;
  background: var(--accent);
  color: #fff;
  z-index: 999;
  border-radius: var(--radius);
  font-size: 0.85rem;
}
.skip-link:focus {
  top: 8px;
}

/* ---- header ---- */
.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1.2rem 1.5rem;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.75rem;
}

.site-logo {
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--text);
  text-decoration: none;
  text-transform: uppercase;
}
.site-logo:hover {
  color: var(--accent-hover);
}

/* ---- nav ---- */
.site-nav ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.15rem 1.4rem;
}

.site-nav a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
  transition: color 0.15s, border-color 0.15s;
}
.site-nav a:hover,
.site-nav a.active {
  color: var(--text);
  border-bottom-color: var(--border-light);
}

/* ---- main ---- */
.site-main {
  flex: 1;
  max-width: var(--max-width);
  width: 100%;
  margin: 0 auto;
  padding: 2.5rem 1.5rem 3rem;
}

/* ---- facade text (homepage) ---- */
.facade-block {
  margin-top: 2rem;
}
.facade-block p {
  color: var(--text-muted);
  margin-bottom: 0.9rem;
  font-size: 1.05rem;
}
.facade-block p:first-child {
  font-weight: 600;
  color: var(--text);
  font-size: 1.1rem;
  letter-spacing: 0.06em;
}
.facade-block .org-name {
  display: block;
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--text);
  margin-bottom: 2rem;
}

/* ---- generic page ---- */
.page-content h1 {
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--text);
  margin-bottom: 1.4rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--border);
}
.page-content h2 {
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--text);
  margin: 1.8rem 0 0.6rem;
}
.page-content p,
.page-content li {
  color: var(--text-muted);
  margin-bottom: 0.75rem;
  font-size: 0.95rem;
}
.page-content ul {
  margin-left: 1.2rem;
  margin-bottom: 1rem;
}
.page-content li {
  margin-bottom: 0.35rem;
}
.page-content a {
  color: var(--accent);
  text-decoration: none;
}
.page-content a:hover {
  color: var(--accent-hover);
  text-decoration: underline;
}
.page-content .notice {
  background: var(--surface);
  border-left: 3px solid var(--border-light);
  padding: 1rem 1.2rem;
  margin: 1.4rem 0;
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* ---- footer ---- */
.site-footer {
  border-top: 1px solid var(--border);
  background: var(--surface);
  font-size: 0.78rem;
  color: var(--text-dim);
  padding: 1.4rem 1.5rem;
  text-align: center;
}
.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}
.footer-links {
  margin-bottom: 0.5rem;
}
.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
}
.footer-links a:hover {
  color: var(--accent-hover);
}
.footer-sep {
  margin: 0 0.5rem;
}
.footer-info {
  margin-bottom: 0.15rem;
}
.footer-host {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-dim);
  margin-top: 0.4rem;
}

/* ---- responsive ---- */
@media (max-width: 600px) {
  html { font-size: 15px; }
  .header-inner {
    flex-direction: column;
    gap: 0.5rem;
  }
  .site-nav ul {
    gap: 0.2rem 1.1rem;
  }
  .site-main {
    padding: 1.8rem 1rem 2rem;
  }
}