/* ============================================================
   e3 University Energy Project — Living Archive Stylesheet
   Institutional Minimalist | Navy / Grey / Green Palette
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Source+Serif+4:ital,opsz,wght@0,8..60,300;0,8..60,400;0,8..60,600;1,8..60,400&family=Source+Sans+3:wght@300;400;600;700&display=swap');

/* ── CSS Custom Properties ── */
:root {
  --navy:       #1a2b4a;
  --navy-light: #243660;
  --navy-mid:   #2c4178;
  --green:      #2e7d4f;
  --green-light:#3a9960;
  --green-pale: #e8f4ec;
  --grey-dark:  #4a4e57;
  --grey-mid:   #767b84;
  --grey-light: #e8e9eb;
  --grey-bg:    #f4f5f6;
  --white:      #ffffff;
  --text:       #2d3038;
  --accent:     #c5832a;

  --font-serif: 'Source Serif 4', Georgia, serif;
  --font-sans:  'Source Sans 3', 'Helvetica Neue', Arial, sans-serif;

  --max-width:  960px;
  --nav-width:  200px;
  --content-pad: 2.5rem;
}

/* ── Reset & Base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

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

body {
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--text);
  background: var(--grey-bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a { color: var(--navy-mid); text-decoration: underline; }
a:hover { color: var(--green); }

/* ── Archive Banner ── */
.archive-banner {
  background: var(--navy);
  color: #a8bbd4;
  font-size: 0.78rem;
  font-family: var(--font-sans);
  letter-spacing: 0.04em;
  padding: 0.55rem 1.5rem;
  text-align: center;
  border-bottom: 2px solid var(--green);
}
.archive-banner strong {
  color: #d4e5f5;
  font-weight: 600;
}

/* ── Site Header ── */
.site-header {
  background: var(--navy);
  padding: 0;
}
.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1.5rem 1.5rem 0;
  display: flex;
  align-items: flex-end;
  gap: 2rem;
}
.site-logo {
  flex-shrink: 0;
}
.logo-mark {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
}
.logo-e3 {
  font-family: var(--font-serif);
  font-size: 3rem;
  font-weight: 300;
  color: var(--white);
  letter-spacing: -0.03em;
  line-height: 1;
}
.logo-e3 sup {
  font-size: 1rem;
  color: var(--green-light);
  vertical-align: super;
  margin-left: 2px;
}
.logo-tagline {
  font-size: 0.72rem;
  font-weight: 300;
  color: #7a9cc4;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  line-height: 1.4;
}
.header-title {
  padding-bottom: 0.25rem;
}
.header-title h1 {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 400;
  color: #c8d8ea;
  letter-spacing: 0.01em;
}
.header-title p {
  font-size: 0.77rem;
  color: #6a8aaa;
  margin-top: 0.15rem;
  letter-spacing: 0.05em;
}

/* ── Monitoring Bar ── */
.monitoring-bar {
  background: var(--navy-light);
  border-top: 1px solid rgba(255,255,255,0.08);
  border-bottom: 1px solid rgba(0,0,0,0.2);
}
.monitoring-bar-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  gap: 0;
}
.mon-label {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #7a9cc4;
  padding: 0.55rem 1rem 0.55rem 0;
  border-right: 1px solid rgba(255,255,255,0.1);
  margin-right: 0.75rem;
  white-space: nowrap;
}
.mon-links {
  display: flex;
  gap: 0;
  flex-wrap: wrap;
}
.mon-link {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #9dbcd8;
  text-decoration: none;
  padding: 0.55rem 0.85rem;
  border-right: 1px solid rgba(255,255,255,0.06);
  transition: background 0.15s, color 0.15s;
}
.mon-link:hover {
  background: rgba(255,255,255,0.06);
  color: var(--white);
}
.mon-link-note {
  font-size: 0.68rem;
  color: #5a7a9a;
  padding: 0.55rem 0.5rem;
  font-style: italic;
  margin-left: auto;
}

/* ── Main Layout ── */
.page-wrapper {
  max-width: var(--max-width);
  margin: 0 auto;
  width: 100%;
  flex: 1;
  display: flex;
  gap: 0;
  background: var(--white);
  box-shadow: 0 1px 4px rgba(0,0,0,0.08);
}

/* ── Sidebar Navigation ── */
.site-nav {
  width: var(--nav-width);
  flex-shrink: 0;
  background: linear-gradient(to bottom, #e9ecf0 0%, #dde1e7 100%);
  border-right: 1px solid #cdd1d8;
  padding: 1.5rem 0 2rem;
}
.nav-section-label {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--grey-mid);
  padding: 0 1rem 0.5rem;
  border-bottom: 1px solid #c8ccd4;
  margin-bottom: 0.25rem;
}
.site-nav ul {
  list-style: none;
}
.site-nav ul li a {
  display: block;
  padding: 0.5rem 1rem 0.5rem 1.1rem;
  font-size: 0.85rem;
  font-weight: 400;
  color: var(--navy);
  text-decoration: none;
  border-left: 3px solid transparent;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
  line-height: 1.4;
}
.site-nav ul li a:hover {
  background: rgba(255,255,255,0.7);
  border-left-color: var(--green);
  color: var(--green);
}
.site-nav ul li a.active {
  background: rgba(255,255,255,0.85);
  border-left-color: var(--navy);
  color: var(--navy);
  font-weight: 600;
}
.nav-divider {
  border: none;
  border-top: 1px solid #c8ccd4;
  margin: 0.75rem 1rem;
}
.nav-badge {
  display: block;
  font-size: 0.65rem;
  color: var(--grey-mid);
  padding: 0 1rem;
  margin-top: 1.5rem;
  line-height: 1.5;
}
.nav-badge strong { color: var(--navy); display: block; margin-bottom: 0.2rem; }

/* ── Main Content ── */
.main-content {
  flex: 1;
  padding: var(--content-pad);
  min-width: 0;
}

/* ── Page Title ── */
.page-title {
  font-family: var(--font-serif);
  font-size: 1.7rem;
  font-weight: 300;
  color: var(--navy);
  letter-spacing: -0.01em;
  line-height: 1.25;
  margin-bottom: 0.3rem;
}
.page-subtitle {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--grey-dark);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 2px solid var(--grey-light);
}
.section-divider {
  border: none;
  border-top: 1px solid var(--grey-light);
  margin: 1.75rem 0;
}

/* ── Typography ── */
h2 {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--navy);
  margin: 1.5rem 0 0.6rem;
}
h3 {
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--navy-mid);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin: 1.25rem 0 0.4rem;
}
p {
  margin-bottom: 1rem;
  color: var(--grey-dark);
  max-width: 65ch;
}
p.wide { max-width: none; }

ul, ol {
  padding-left: 1.5rem;
  margin-bottom: 1rem;
}
li {
  color: var(--grey-dark);
  margin-bottom: 0.4rem;
}
.last-updated {
  font-size: 0.75rem;
  color: var(--grey-mid);
  font-style: italic;
  margin-top: 1.5rem;
}

/* ── Buildings Table ── */
.buildings-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.84rem;
  margin: 1rem 0 1.5rem;
}
.buildings-table th {
  background: var(--navy);
  color: var(--white);
  font-weight: 600;
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.6rem 0.75rem;
  text-align: left;
}
.buildings-table td {
  padding: 0.4rem 0.75rem;
  color: var(--grey-dark);
  border-bottom: 1px solid var(--grey-light);
  vertical-align: top;
}
.buildings-table tr:nth-child(even) td { background: var(--grey-bg); }

/* ── Goal Stats / Callout Boxes ── */
.stat-row {
  display: flex;
  gap: 1rem;
  margin: 1.25rem 0;
  flex-wrap: wrap;
}
.stat-box {
  flex: 1;
  min-width: 140px;
  background: var(--green-pale);
  border-left: 3px solid var(--green);
  padding: 0.85rem 1rem;
  border-radius: 0 4px 4px 0;
}
.stat-box .stat-value {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--green);
  display: block;
  line-height: 1.2;
}
.stat-box .stat-label {
  font-size: 0.77rem;
  color: var(--grey-dark);
  margin-top: 0.2rem;
}
.callout {
  background: #eef3fa;
  border-left: 3px solid var(--navy-mid);
  padding: 0.85rem 1.1rem;
  margin: 1.25rem 0;
  border-radius: 0 4px 4px 0;
}
.callout p { margin: 0; font-size: 0.88rem; }

/* ── FAQ ── */
.faq-item {
  margin-bottom: 1.4rem;
  padding-bottom: 1.4rem;
  border-bottom: 1px solid var(--grey-light);
}
.faq-item:last-child { border-bottom: none; }
.faq-q {
  font-weight: 700;
  color: var(--navy);
  font-size: 0.9rem;
  margin-bottom: 0.4rem;
}
.faq-a { color: var(--grey-dark); font-size: 0.9rem; }
.faq-note {
  font-size: 0.78rem;
  color: var(--grey-mid);
  font-style: italic;
  margin-bottom: 1.25rem;
}

/* ── Links / Partners ── */
.link-group { margin-bottom: 1.75rem; }
.link-group h3 { margin-top: 0; }
.link-list { list-style: none; padding: 0; }
.link-list li {
  padding: 0.35rem 0;
  border-bottom: 1px solid var(--grey-light);
  font-size: 0.88rem;
}
.link-list li:last-child { border-bottom: none; }
.link-list li a { color: var(--navy-mid); font-weight: 600; }
.link-list li .link-desc { color: var(--grey-mid); font-size: 0.82rem; display: block; }

/* ── Awareness Materials ── */
.material-row {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--grey-light);
}
.material-row:last-child { border-bottom: none; }
.material-info { flex: 1; }
.material-title { font-weight: 700; color: var(--navy); font-size: 0.9rem; }
.material-desc { font-size: 0.84rem; color: var(--grey-dark); margin-top: 0.2rem; }
.material-meta {
  font-size: 0.75rem;
  color: var(--grey-mid);
  white-space: nowrap;
  padding-top: 0.15rem;
}

/* ── Contact ── */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 1.25rem;
  margin: 1.25rem 0;
}
.contact-card {
  border: 1px solid var(--grey-light);
  border-radius: 4px;
  padding: 1rem;
  text-align: center;
}
.contact-card .uni-name {
  font-weight: 700;
  color: var(--navy);
  font-size: 0.88rem;
  margin-bottom: 0.4rem;
}
.contact-card a { font-size: 0.82rem; }

/* ── News Downloads ── */
.download-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.87rem;
  margin: 0.75rem 0 1.25rem;
}
.download-table th {
  background: var(--navy);
  color: var(--white);
  font-size: 0.77rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.55rem 0.75rem;
  text-align: left;
}
.download-table td {
  padding: 0.45rem 0.75rem;
  border-bottom: 1px solid var(--grey-light);
  color: var(--grey-dark);
}
.download-table tr:hover td { background: var(--grey-bg); }

/* ── Footer ── */
.site-footer {
  background: var(--navy);
  color: #6a8aaa;
  font-size: 0.78rem;
  padding: 1rem 1.5rem;
  text-align: center;
  letter-spacing: 0.03em;
  margin-top: auto;
}
.site-footer a { color: #9dbcd8; }
.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.footer-tagline {
  font-family: var(--font-serif);
  font-style: italic;
  color: #4a6a8a;
  font-size: 0.85rem;
  letter-spacing: 0.08em;
}

/* ── Responsive ── */
@media (max-width: 700px) {
  .page-wrapper { flex-direction: column; }
  .site-nav { width: 100%; }
  .monitoring-bar-inner { flex-wrap: wrap; }
  .header-inner { flex-direction: column; align-items: flex-start; }
  .stat-row { flex-direction: column; }
  .contact-grid { grid-template-columns: 1fr 1fr; }
}