/* Layout: header, nav, shells, footer */

.app-header {
  position: sticky; top: 0; z-index: 60;
  height: var(--header-h);
  display: flex; align-items: center; gap: var(--sp-5);
  padding: 0 var(--sp-4);
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
}
.brand { display: flex; align-items: center; gap: var(--sp-2); font-weight: 700; font-size: var(--fs-lg); letter-spacing: .3px; }
.brand-mark {
  width: 26px; height: 26px; border-radius: 7px;
  background: linear-gradient(135deg, var(--accent), #7b3ff2);
  display: grid; place-items: center; color: #fff; font-weight: 800; font-size: 14px;
}
.brand-mark::after { content: "B"; }   /* user brand mark — BitMEX. Admin overrides this in admin.css */

.main-nav { display: flex; align-items: center; gap: 2px; flex: 1; }
.main-nav a {
  padding: 8px 12px; border-radius: var(--radius-sm);
  color: var(--text-secondary); font-weight: 500; font-size: var(--fs-md);
  transition: var(--transition);
}
.main-nav a:hover { color: var(--text-primary); background: var(--bg-hover); }
.main-nav a.active { color: var(--text-primary); background: var(--accent-soft); }

.header-actions { display: flex; align-items: center; gap: var(--sp-2); }

/* Language switcher */
.lang-dropdown { position: relative; }
.lang-btn {
  display: inline-flex; align-items: center; gap: 5px;
  height: 34px; padding: 0 10px; border-radius: var(--radius-sm);
  color: var(--text-secondary); font-weight: 600; font-size: var(--fs-sm);
  border: 1px solid var(--border-color); transition: var(--transition);
}
.lang-btn:hover { background: var(--bg-hover); color: var(--text-primary); }
.lang-flag { font-size: 15px; line-height: 1; }
.lang-code { letter-spacing: .03em; }
.lang-dropdown .dropdown-menu { min-width: 180px; }
.lang-dropdown .dropdown-menu a { gap: 8px; }
.lang-dropdown .dropdown-menu a .lang-name { flex: 1; }
.lang-dropdown .dropdown-menu a .lang-check { margin-left: auto; color: var(--accent); }
.lang-dropdown .dropdown-menu a.active { background: var(--accent-soft); color: var(--text-primary); }
/* Keep the 2-letter code at small widths — emoji flags render as tofu on some
   Android/Windows builds, so the code is the reliable indicator. */
@media (max-width: 480px) { .lang-btn { padding: 0 8px; gap: 4px; } }

.page { padding: var(--sp-6); max-width: 1600px; margin: 0 auto; }
.page-narrow { max-width: 1120px; }
.page-header { display: flex; align-items: center; justify-content: space-between; gap: var(--sp-4); margin-bottom: var(--sp-5); flex-wrap: wrap; }
.page-header h1 { font-size: var(--fs-2xl); }
.page-subtitle { color: var(--text-muted); margin-top: 2px; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 var(--sp-4); }

.grid { display: grid; gap: var(--sp-4); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-auto { grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }

.stack { display: flex; flex-direction: column; gap: var(--sp-4); }
.row { display: flex; gap: var(--sp-3); align-items: center; }
.row-between { display: flex; gap: var(--sp-3); align-items: center; justify-content: space-between; }
.spacer { flex: 1; }

/* Auth pages */
.auth-shell { min-height: 100vh; display: grid; grid-template-columns: 1fr 480px; }
.auth-aside {
  background:
    radial-gradient(circle at 20% 20%, rgba(47,111,237,.22), transparent 45%),
    radial-gradient(circle at 80% 60%, rgba(123,63,242,.18), transparent 40%),
    var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  padding: var(--sp-10); display: flex; flex-direction: column; justify-content: space-between;
}
.auth-aside h2 { font-size: var(--fs-3xl); line-height: 1.15; max-width: 460px; }
.auth-aside p { color: var(--text-secondary); margin-top: var(--sp-4); max-width: 420px; }
.auth-main { display: flex; align-items: center; justify-content: center; padding: var(--sp-6); }
.auth-card { width: 100%; max-width: 380px; }
.auth-card h1 { font-size: var(--fs-2xl); margin-bottom: var(--sp-1); }
.auth-card .lead { color: var(--text-muted); margin-bottom: var(--sp-6); }
.auth-alt { margin-top: var(--sp-5); text-align: center; color: var(--text-muted); }
.auth-alt a { color: var(--accent); font-weight: 600; }

/* Language selector on auth pages (the header switcher is hidden there) */
.auth-lang {
  position: fixed; left: 0; right: 0; bottom: 0;
  display: flex; flex-wrap: wrap; justify-content: center; gap: 4px;
  padding: 10px 12px; background: var(--bg-secondary);
  border-top: 1px solid var(--border-color); z-index: 40;
}
.auth-lang-opt {
  display: inline-flex; align-items: center; gap: 5px;
  min-height: 32px; padding: 4px 10px; border-radius: 8px;
  font-size: var(--fs-sm); color: var(--text-secondary); white-space: nowrap;
}
.auth-lang-opt:hover { background: var(--bg-tertiary); color: var(--text-primary); }
.auth-lang-opt.is-current { color: var(--accent); font-weight: 600; }
.auth-main { padding-bottom: 64px; }

/* Admin shell — full styling lives in admin.css (self-contained) */

/* Footer */
.site-footer { border-top: 1px solid var(--border-color); background: var(--bg-secondary); margin-top: var(--sp-10); }
.site-footer .container { padding: var(--sp-8) var(--sp-4); }
.footer-cols { display: grid; grid-template-columns: 2fr repeat(3, 1fr); gap: var(--sp-6); }
.footer-cols h4 { font-size: var(--fs-sm); text-transform: uppercase; letter-spacing: .08em; color: var(--text-muted); margin-bottom: var(--sp-3); }
.footer-cols a { display: block; color: var(--text-secondary); padding: 4px 0; }
.footer-cols a:hover { color: var(--text-primary); }
.footer-bottom { border-top: 1px solid var(--border-color); margin-top: var(--sp-6); padding-top: var(--sp-4); color: var(--text-muted); display: flex; justify-content: space-between; flex-wrap: wrap; gap: var(--sp-2); }

/* Mobile bottom nav (hidden on desktop) */
.mobile-nav, .mobile-drawer, .mobile-header { display: none; }

.demo-ribbon {
  background: var(--warning-soft); color: var(--warning);
  border-bottom: 1px solid rgba(243,175,74,.25);
  text-align: center; font-size: var(--fs-sm); font-weight: 600; padding: 5px 12px;
  letter-spacing: .04em;
}