/**
 * Global Energy Flow — Shared Header CSS
 * =======================================
 * Single source of truth for the top header + mobile nav on every page.
 *
 * Loaded by every HTML page. Defines: <header>, .logo, .nav, .nav-hamburger,
 * .nav-mobile, .header-meta.
 *
 * This file is extracted from dashboard-main.css so non-dashboard pages can
 * present an identical header without pulling in the full dashboard layout.
 *
 * Color tokens are duplicated in :root because some pages don't load
 * dashboard-main.css at all. Keep these values in sync with dashboard-main.css.
 */

:root {
  --gh-bg:        #08090A;
  --gh-surface-2: #141516;
  --gh-border:    rgba(255,255,255,0.05);
  --gh-border-s:  rgba(255,255,255,0.08);
  --gh-text:      #F7F8F8;
  --gh-text-2:    #8A8F98;
  --gh-text-3:    #62666D;
  --gh-accent:    #5E6AD2;
}

/* Header */
header.gef-header-v2 {
  border-bottom: 1px solid var(--gh-border);
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  background: var(--gh-bg);
  font-family: 'Inter', -apple-system, system-ui, sans-serif;
}
header.gef-header-v2 a { color: inherit; text-decoration: none; }

header.gef-header-v2 .logo {
  display: inline-flex;
  align-items: center;
  font-size: 15px;
  font-weight: 600;
  color: var(--gh-text);
  letter-spacing: 0.02em;
}
header.gef-header-v2 .logo-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  margin-right: 8px;
}

header.gef-header-v2 .nav { display: flex; gap: 0; }
header.gef-header-v2 .nav a {
  padding: 6px 12px;
  color: var(--gh-text-3);
  font-size: 12px;
  font-weight: 400;
  border-radius: 4px;
}
header.gef-header-v2 .nav a:hover { color: var(--gh-text-2); }
header.gef-header-v2 .nav a.active { color: var(--gh-text); }

header.gef-header-v2 .header-meta {
  font-size: 11px;
  color: var(--gh-text-3);
  font-variant-numeric: tabular-nums;
}

/* Hamburger button — hidden on desktop, shown on mobile */
header.gef-header-v2 .nav-hamburger {
  display: none;
  background: transparent;
  border: 1px solid var(--gh-border);
  border-radius: 6px;
  width: 36px;
  height: 36px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  color: var(--gh-text-2);
  padding: 0;
}
header.gef-header-v2 .nav-hamburger:hover {
  color: var(--gh-text);
  border-color: var(--gh-border-s);
}
header.gef-header-v2 .nav-hamburger svg { width: 18px; height: 18px; }

/* Mobile menu panel (hidden by default; appears when .open is added) */
.nav-mobile-v2 {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: var(--gh-bg);
  z-index: 100;
  padding: 60px 24px 24px;
  overflow-y: auto;
  font-family: 'Inter', -apple-system, system-ui, sans-serif;
}
.nav-mobile-v2.open { display: block; }
.nav-mobile-v2 .nav-mobile-close {
  position: absolute;
  top: 16px;
  right: 16px;
  background: transparent;
  border: 1px solid var(--gh-border);
  border-radius: 6px;
  width: 36px;
  height: 36px;
  color: var(--gh-text-2);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}
.nav-mobile-v2 a {
  display: block;
  padding: 14px 12px;
  color: var(--gh-text-2);
  font-size: 16px;
  border-bottom: 1px solid var(--gh-border);
  text-decoration: none;
}
.nav-mobile-v2 a.active { color: var(--gh-text); }
.nav-mobile-v2 a:hover { background: var(--gh-surface-2); color: var(--gh-text); }

@media (max-width: 768px) {
  header.gef-header-v2 .nav { display: none; }
  header.gef-header-v2 .nav-hamburger { display: inline-flex; }
  header.gef-header-v2 {
    padding: 12px 16px;
    gap: 12px;
  }
  header.gef-header-v2 .header-meta {
    font-size: 10px;
    max-width: 110px;
    text-align: right;
    line-height: 1.3;
  }
}