/* ============================================================
   Header & Top Navigation
   ============================================================ */

/* --- Site disclaimer top bar --- */
.top-bar {
  background: var(--color-dark);
  border-bottom: 1px solid var(--color-border);
  padding: 0.4rem 1rem;
  text-align: center;
  font-size: 0.72rem;
  color: var(--color-muted);
}
.top-bar a { color: var(--color-accent); margin-left: 0.35rem; }

/* --- Main header --- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--color-dark);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow 0.3s ease;
}
.site-header.scrolled {
  box-shadow: 0 2px 20px rgba(0,0,0,0.5);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
  padding: 0 1rem;
  max-width: 1600px;
  margin: 0 auto;
}

/* --- Logo --- */
.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
}
.logo svg { height: 28px; width: auto; }
.logo-wordmark {
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--color-text);
  letter-spacing: -0.5px;
}
.logo-wordmark .green { color: var(--color-accent); }

/* --- Search --- */
.header-search {
  position: relative;
  max-width: 280px;
  width: 100%;
  margin: 0 1rem;
}
.header-search input {
  width: 100%;
  height: 36px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 0 0.75rem 0 2.25rem;
  font-size: 0.85rem;
  color: var(--color-text);
  transition: border-color var(--transition);
}
.header-search input::placeholder { color: var(--color-muted); }
.header-search input:focus { border-color: var(--color-accent); }
.header-search svg {
  position: absolute;
  left: 0.65rem;
  top: 50%;
  transform: translateY(-50%);
  width: 16px;
  height: 16px;
  color: var(--color-muted);
}

/* --- Header actions (right side) --- */
.header-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
}
.header-actions .btn {
  padding: 0.45rem 1rem;
  font-size: 0.8rem;
  min-height: 36px;
}
.header-icon-btn {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  color: var(--color-muted);
  transition: all var(--transition);
}
.header-icon-btn:hover {
  background: var(--color-surface);
  color: var(--color-accent);
}
.header-icon-btn svg { width: 18px; height: 18px; }

/* --- Desktop nav (hidden on mobile) --- */
.desktop-nav { display: none; }

/* --- Sidebar toggle for tablet --- */
.sidebar-toggle {
  display: none;
  width: 36px;
  height: 36px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  color: var(--color-muted);
  flex-shrink: 0;
}
.sidebar-toggle:hover { background: var(--color-surface); color: var(--color-text); }
.sidebar-toggle svg { width: 20px; height: 20px; }

/* --- Hamburger / mobile toggle --- */
.hamburger {
  display: flex;
  flex-direction: column;
  gap: 5px;
  width: 24px;
  height: 24px;
  justify-content: center;
  cursor: pointer;
  flex-shrink: 0;
}
.hamburger span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all 0.3s ease;
}
.hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* --- Mobile sidebar (slide from left) --- */
.mobile-sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: 280px;
  height: 100vh;
  background: var(--color-dark);
  z-index: 2000;
  transform: translateX(-100%);
  transition: transform 0.3s ease;
  overflow-y: auto;
  padding: 1rem;
  border-right: 1px solid var(--color-border);
}
.mobile-sidebar.open { transform: translateX(0); }
.mobile-sidebar-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  z-index: 1999;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}
.mobile-sidebar-overlay.show {
  opacity: 1;
  pointer-events: auto;
}

.mobile-sidebar .sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 1rem;
}
.mobile-sidebar .close-btn {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-muted);
  border-radius: var(--radius-sm);
}
.mobile-sidebar .close-btn:hover { background: var(--color-surface); color: var(--color-text); }

.sidebar-nav-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.65rem 0.75rem;
  border-radius: var(--radius-sm);
  color: var(--color-muted);
  font-size: 0.9rem;
  transition: all var(--transition);
}
.sidebar-nav-item:hover,
.sidebar-nav-item.active {
  background: rgba(0,231,1,0.06);
  color: var(--color-accent);
}
.sidebar-nav-item svg { width: 18px; height: 18px; flex-shrink: 0; }

/* --- Token widget in sidebar --- */
.token-widget {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 1rem;
  margin-bottom: 1rem;
  border: 1px solid var(--color-border);
}
.token-widget-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}
.token-widget-header .token-icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.65rem;
  font-weight: 800;
  color: #000;
}
.token-widget .token-price {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-text);
}
.token-widget .token-change {
  font-size: 0.75rem;
  color: var(--color-accent);
}

/* --- Top tabs --- */
.top-tabs {
  background: var(--color-dark);
  border-bottom: 1px solid var(--color-border);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  position: sticky;
  top: var(--header-h);
  z-index: 999;
}
.top-tabs::-webkit-scrollbar { display: none; }
.top-tabs-inner {
  display: flex;
  gap: 0;
  padding: 0 0.5rem;
  min-width: max-content;
}
.tab-item {
  padding: 0.65rem 1rem;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--color-muted);
  white-space: nowrap;
  border-bottom: 2px solid transparent;
  transition: all var(--transition);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.35rem;
}
.tab-item:hover { color: var(--color-text); }
.tab-item.active {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}
.tab-item .tab-count {
  font-size: 0.65rem;
  background: var(--color-surface);
  padding: 0.1rem 0.4rem;
  border-radius: var(--radius-sm);
}

/* --- Body offset for fixed header --- */
.site-header-wrap {
  height: calc(var(--header-h) + 36px);
}

/* ============================================ */
/*        DESKTOP ≥1025px                       */
/* ============================================ */
@media (min-width: 1025px) {
  .hamburger { display: none; }
  .sidebar-toggle { display: flex; }
  .desktop-nav {
    display: flex;
    align-items: center;
    gap: 0.15rem;
  }
  .desktop-nav a {
    padding: 0.5rem 0.75rem;
    font-size: 0.8rem;
    color: var(--color-muted);
    border-radius: var(--radius-sm);
    white-space: nowrap;
    transition: all var(--transition);
  }
  .desktop-nav a:hover { color: var(--color-text); background: var(--color-surface); }
  .header-actions .btn-sign-up { display: inline-flex; }
}

/* ============================================ */
/*        TABLET 601–1024px                     */
/* ============================================ */
@media (min-width: 601px) and (max-width: 1024px) {
  .header-search { max-width: 180px; }
  .desktop-nav { display: none; }
}

/* ============================================ */
/*        MOBILE ≤600px                         */
/* ============================================ */
@media (max-width: 600px) {
  .header-inner { padding: 0 0.75rem; }
  .header-search { display: none; }
  .header-actions .btn { display: none; }
  .header-actions .header-icon-btn:nth-child(n+3) { display: none; }
}