/* TradeAlphaAI — Canonical Global Header CSS
 * Single source of truth for ALL header/nav styles platform-wide.
 * Phase 70: unified from dual-system to one canonical system.
 *
 * DO NOT add header overrides in page-specific CSS or inline styles.
 * DO NOT duplicate these rules in other stylesheets.
 * Class names match exactly what js/global-header.js creates at runtime.
 *
 * Runtime class structure:
 *   .topbar[data-global-header]   — header element (sticky)
 *   .topbar-inner                 — max-width centered row
 *   .brand                        — logo + wordmark
 *   .top-actions                  — right-side action cluster
 *   .nav-group                    — desktop nav pill container
 *   .nav-link                     — individual nav link
 *   .nav-menu                     — dropdown trigger + dropdown wrapper
 *   .nav-dropdown                 — dropdown content
 *   .nav-badge                    — "Hot" badge
 *   .header-signal-cta            — Telegram CTA button
 *   .locale-links                 — language switcher
 *   .lang-switch                  — individual language link
 *   .mobile-menu-toggle           — hamburger button (shown <1120px)
 *
 * Mobile drawer (created by runtime JS):
 *   .mobile-nav-shell[is-open]    — fixed full-viewport overlay container
 *   .mobile-nav-backdrop          — semi-transparent click-to-close backdrop
 *   .mobile-nav-panel             — sliding drawer panel (role=dialog)
 *   .mobile-nav-head              — drawer header row (label + close btn)
 *   .mobile-nav-close             — close button inside drawer
 *   .mobile-nav-links             — nav link list inside drawer
 */

/* ── Design tokens ─────────────────────────────────────────────────────────── */
:root {
  --header-height:        76px;
  --header-height-mobile: 68px;
  --header-bg:            rgba(5, 6, 8, 0.82);
  --header-border:        rgba(216, 177, 90, 0.08);
  --header-text:          #f4f7f1;
  --header-muted:         #8d978f;
  --header-active:        rgba(216, 177, 90, 0.22);
  --header-active-bg:     rgba(216, 177, 90, 0.08);
  --header-nav-bg:        rgba(255, 255, 255, 0.02);
  --header-nav-border:    rgba(255, 255, 255, 0.05);
  --header-cta-border:    rgba(183, 255, 84, 0.24);
  --header-cta-bg:        linear-gradient(135deg, rgba(183, 255, 84, 0.18), rgba(216, 177, 90, 0.12)), rgba(255, 255, 255, 0.035);
  --header-cta-glow:      0 10px 28px rgba(183, 255, 84, 0.08);
  --header-z:             1000;
  --drawer-z:             1200;
  --drawer-width:         min(340px, 88vw);
  --drawer-bg:            #07101e;
  --drawer-slide-dur:     260ms;
}

html { scroll-padding-top: calc(var(--header-height) + 18px); }
body { min-width: 0; overflow-x: hidden; }
body.mobile-nav-open { overflow: hidden; }

/* ── Canonical header element ─────────────────────────────────────────────── */
.topbar,
.site-header,
[data-global-header] {
  position: sticky;
  top: 0;
  z-index: var(--header-z);
  width: 100%;
  min-height: var(--header-height);
  border-bottom: 1px solid var(--header-border);
  background: var(--header-bg);
  color: var(--header-text);
  backdrop-filter: blur(18px) saturate(1.1);
  -webkit-backdrop-filter: blur(18px) saturate(1.1);
}

/* ── Inner row ────────────────────────────────────────────────────────────── */
.topbar-inner,
.site-header-inner {
  width: 100%;
  max-width: 1200px;
  min-height: var(--header-height);
  margin-inline: auto;
  padding-inline: clamp(16px, 4vw, 28px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

/* ── Brand ────────────────────────────────────────────────────────────────── */
.brand {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 14px;
  color: var(--header-text);
  text-decoration: none;
}

.brand-mark {
  position: relative;
  width: 42px;
  height: 42px;
  flex: 0 0 42px;
  border: 1px solid rgba(216, 177, 90, 0.22);
  border-radius: 13px;
  background:
    linear-gradient(145deg, rgba(216, 177, 90, 0.2), rgba(216, 177, 90, 0.03)),
    radial-gradient(circle at 70% 28%, rgba(125, 255, 140, 0.16), transparent 34%);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08), 0 0 30px rgba(216, 177, 90, 0.12);
}

.brand-mark::before,
.brand-mark::after {
  content: "";
  position: absolute;
  inset: 9px;
  border-radius: 10px;
}

.brand-mark::before {
  border: 1px solid rgba(242, 210, 123, 0.42);
  clip-path: polygon(0 100%, 34% 18%, 52% 46%, 69% 0, 100% 0, 100% 100%);
}

.brand-mark::after {
  inset: 13px 12px;
  background: linear-gradient(180deg, rgba(183, 255, 84, 0.95), rgba(216, 177, 90, 0.95));
  clip-path: polygon(0 100%, 28% 38%, 48% 66%, 100% 0, 100% 26%, 56% 100%);
  opacity: 0.9;
}

.brand-copy strong {
  display: block;
  color: var(--header-text);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.brand-copy span {
  display: block;
  color: var(--header-muted);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* ── Top actions cluster ─────────────────────────────────────────────────── */
.top-actions {
  min-width: 0;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 12px;
  flex-wrap: wrap;
  position: relative;
}

/* ── Desktop nav group ────────────────────────────────────────────────────── */
.nav-group {
  min-width: 0;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px;
  border: 1px solid var(--header-nav-border);
  border-radius: 999px;
  background: var(--header-nav-bg);
}

/* ── Nav links ────────────────────────────────────────────────────────────── */
.nav-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 0 14px;
  border: 1px solid transparent;
  border-radius: 999px;
  color: var(--header-muted);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0;
  line-height: 1.2;
  text-decoration: none;
  white-space: nowrap;
}

.nav-link:hover,
.nav-link:focus-visible,
.nav-link.is-active,
.nav-link[aria-current="page"] {
  color: var(--header-text);
  border-color: var(--header-active);
  background: var(--header-active-bg);
}

/* ── Dropdown ─────────────────────────────────────────────────────────────── */
.nav-menu {
  position: relative;
  display: flex;
  align-items: center;
}

.nav-menu-trigger { gap: 6px; }

.nav-badge {
  padding: 2px 5px;
  border-radius: 3px;
  background: #dc3545;
  color: #fff;
  font-size: 0.58rem;
  font-weight: 800;
  line-height: 1;
  text-transform: uppercase;
}

.nav-dropdown {
  position: absolute;
  inset-block-start: calc(100% + 8px);
  inset-inline-start: 0;
  z-index: 1100;
  width: min(300px, 82vw);
  padding: 8px;
  border: 1px solid rgba(148, 163, 184, 0.2);
  border-radius: 6px;
  background: #0b1727;
  box-shadow: 0 18px 48px rgba(2, 8, 23, 0.38);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px);
  transition: opacity 150ms ease, transform 150ms ease, visibility 150ms ease;
}

.nav-dropdown a {
  display: block;
  padding: 10px 11px;
  border-radius: 4px;
  color: #dbe7f5;
  font-size: 0.82rem;
  font-weight: 600;
  line-height: 1.35;
  text-decoration: none;
}

.nav-dropdown a:hover,
.nav-dropdown a:focus-visible {
  background: rgba(110, 231, 216, 0.1);
  color: #fff;
}

.nav-menu:hover .nav-dropdown,
.nav-menu:focus-within .nav-dropdown,
.nav-menu.is-open .nav-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

/* ── CTA button ────────────────────────────────────────────────────────────── */
.header-signal-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 0 16px;
  border: 1px solid var(--header-cta-border);
  border-radius: 999px;
  background: var(--header-cta-bg);
  color: var(--header-text);
  box-shadow: var(--header-cta-glow);
  font-size: 13px;
  font-weight: 800;
  text-decoration: none;
  white-space: nowrap;
}

/* ── Language switcher ────────────────────────────────────────────────────── */
.locale-links {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 6px;
  padding: 4px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.025);
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 34px;
  padding: 0 12px;
  border: 1px solid transparent;
  border-radius: 999px;
  color: var(--header-muted);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0;
  line-height: 1;
  text-decoration: none;
}

.lang-switch:hover,
.lang-switch:focus-visible {
  background: rgba(255, 255, 255, 0.06);
  color: var(--header-text);
}

/* ── Mobile menu toggle (hamburger) ──────────────────────────────────────── */
.mobile-menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  flex: 0 0 42px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.045);
  cursor: pointer;
}

.mobile-menu-toggle span {
  width: 17px;
  height: 2px;
  border-radius: 2px;
  background: var(--header-text);
  pointer-events: none;
}

/* ── Mobile nav shell (full-viewport overlay) ────────────────────────────── */
.mobile-nav-shell {
  position: fixed;
  inset: 0;
  z-index: var(--drawer-z);
  display: flex;
  visibility: hidden;
  transition: visibility 0s linear var(--drawer-slide-dur);
}

.mobile-nav-shell.is-open {
  visibility: visible;
  transition-delay: 0s;
}

/* ── Mobile nav backdrop (click-to-close overlay) ────────────────────────── */
.mobile-nav-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  opacity: 0;
  transition: opacity 240ms ease;
  cursor: pointer;
  border: none;
  padding: 0;
}

.mobile-nav-shell.is-open .mobile-nav-backdrop { opacity: 1; }

/* ── Mobile nav sliding panel ────────────────────────────────────────────── */
.mobile-nav-panel {
  position: relative;
  display: flex;
  flex-direction: column;
  width: var(--drawer-width);
  max-height: 100%;
  overflow-y: auto;
  background: var(--drawer-bg);
  box-shadow: 12px 0 48px rgba(2, 8, 23, 0.5);
  transform: translateX(-100%);
  transition: transform var(--drawer-slide-dur) cubic-bezier(0.4, 0, 0.2, 1);
}

[dir="rtl"] .mobile-nav-panel {
  margin-inline-start: auto;
  transform: translateX(100%);
}

.mobile-nav-shell.is-open .mobile-nav-panel { transform: translateX(0); }

/* ── Drawer head row ─────────────────────────────────────────────────────── */
.mobile-nav-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 20px;
  border-bottom: 1px solid rgba(148, 163, 184, 0.12);
  color: #dbe7f5;
  font-weight: 700;
}

/* ── Close button ────────────────────────────────────────────────────────── */
.mobile-nav-close {
  width: 38px;
  height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.05);
  color: #dbe7f5;
  cursor: pointer;
  font-size: 1.2rem;
  line-height: 1;
}

/* ── Nav links inside drawer ─────────────────────────────────────────────── */
.mobile-nav-links {
  display: flex;
  flex-direction: column;
  padding: 16px 12px;
  gap: 2px;
  flex: 1;
}

.mobile-nav-links a {
  display: block;
  padding: 12px 14px;
  border-radius: 8px;
  color: #dbe7f5;
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  transition: background 140ms ease;
}

.mobile-nav-links a:hover,
.mobile-nav-links a:focus-visible { background: rgba(110, 231, 216, 0.08); }
.mobile-nav-links a.is-active     { color: rgba(216, 177, 90, 0.9); }

/* ── RTL overrides ────────────────────────────────────────────────────────── */
[dir="rtl"] .brand              { flex-direction: row-reverse; }
[dir="rtl"] .top-actions,
[dir="rtl"] .nav-group          { direction: rtl; }
[dir="rtl"] .nav-dropdown       { inset-inline-start: auto; inset-inline-end: 0; }

/* ── Responsive: ≤1120px — collapse desktop nav, show hamburger ───────────── */
@media (max-width: 1120px) {
  .nav-group           { display: none; }
  .mobile-menu-toggle  { display: inline-flex; }
  .nav-dropdown        { display: none; }
}

/* ── Responsive: ≤640px — tighten spacing, hide secondary elements ────────── */
@media (max-width: 640px) {
  :root {
    --header-height:     var(--header-height-mobile);
    scroll-padding-top: calc(var(--header-height-mobile) + 14px);
  }
  .topbar-inner,
  .site-header-inner     { gap: 8px; }
  .brand-copy span,
  .locale-links,
  .header-signal-cta     { display: none; }
}

/* ── Reduced motion ───────────────────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  .topbar *,
  .site-header *,
  .mobile-nav-shell *    { transition-duration: 0.01ms !important; }
}