/* ============================================================
   mobile-nav.css — Mobile Header + Hamburger Slide-Out Nav
   Nova Design Spec 2026-03-16
   ============================================================ */

/* ── Mobile Sticky Header ─────────────────────────────────── */
.mobile-header {
  display: none;
  position: sticky;
  top: 0;
  z-index: 200;
  justify-content: space-between;
  align-items: center;
  padding: 0 16px;
  height: 56px;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--glass-border);
}

.mobile-header__logo {
  font-size: 1.1rem;
  font-weight: var(--font-bold);
  color: var(--text-primary);
  text-decoration: none;
}
.mobile-header__logo span { color: var(--teal-400); }

.mobile-header__right {
  display: flex;
  align-items: center;
  gap: 4px;
}

.mobile-header__theme-btn {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  font-size: 1.1rem;
  cursor: pointer;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

.mobile-header__hamburger {
  width: 44px;
  height: 44px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0;
  border-radius: var(--radius-sm);
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

.hamburger-line {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform var(--duration-normal) var(--ease-out-expo),
              opacity var(--duration-fast);
}

/* Hamburger → X morph */
.mobile-header__hamburger.is-open .hamburger-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.mobile-header__hamburger.is-open .hamburger-line:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}
.mobile-header__hamburger.is-open .hamburger-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ── Slide-Out Menu Backdrop ──────────────────────────────── */
.mobile-menu-backdrop {
  position: fixed;
  inset: 0;
  z-index: 190;
  background: rgba(7,9,15,0.7);
  backdrop-filter: blur(4px);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-normal);
}
.mobile-menu-backdrop.is-open {
  opacity: 1;
  pointer-events: all;
}

/* ── Slide-Out Menu Sheet ─────────────────────────────────── */
.mobile-menu {
  position: fixed;
  top: 0;
  right: 0;
  z-index: 195;
  width: min(320px, 90vw);
  height: 100dvh;
  background: var(--bg-card);
  border-left: 1px solid var(--glass-border-teal);
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform var(--duration-sheet) var(--ease-out-expo);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior: contain;
}
.mobile-menu.is-open {
  transform: translateX(0);
}

/* ── Sheet Header ─────────────────────────────────────────── */
.mobile-menu__header {
  padding: 20px 16px 16px;
  background: linear-gradient(135deg, rgba(0,212,170,0.08), rgba(79,172,254,0.05));
  border-bottom: 1px solid var(--border-default);
  flex-shrink: 0;
  position: relative;
}

.mobile-menu__user-row {
  display: flex;
  align-items: center;
  gap: 12px;
}

.mobile-menu__avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--teal-400), var(--blue-400));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  font-weight: var(--font-bold);
  color: var(--text-inverse);
  flex-shrink: 0;
}

.mobile-menu__user-info {
  flex: 1;
  min-width: 0;
}

.mobile-menu__user-name {
  font-size: var(--text-md);
  font-weight: var(--font-bold);
  color: var(--text-primary);
  line-height: 1.2;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.mobile-menu__user-tier {
  font-size: var(--text-xs);
  color: var(--text-muted);
}
.mobile-menu__user-tier.is-pro {
  color: var(--teal-400);
}

.mobile-menu__close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 44px;
  height: 44px;
  background: var(--bg-input);
  border: none;
  border-radius: 50%;
  color: var(--text-secondary);
  font-size: 1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

/* ── Quick Stats Row ──────────────────────────────────────── */
.mobile-menu__stats {
  display: flex;
  gap: 8px;
  margin-top: 12px;
  flex-wrap: wrap;
}
.mobile-menu__stat {
  background: var(--bg-input);
  border-radius: var(--radius-md);
  padding: 6px 10px;
  font-size: var(--text-xs);
  color: var(--text-secondary);
  flex: 1;
  min-width: 70px;
  text-align: center;
}
.mobile-menu__stat-value {
  display: block;
  font-size: var(--text-base);
  font-weight: var(--font-bold);
  color: var(--text-primary);
  line-height: 1;
}

/* ── Nav Items ────────────────────────────────────────────── */
.mobile-menu__nav {
  flex: 1;
  padding: 8px 8px;
  overflow-y: auto;
  overscroll-behavior: contain;
}

.mobile-menu__section {
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  padding: 12px 8px 4px;
  margin-top: 4px;
}

.mobile-menu__link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 12px;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  text-decoration: none;
  font-size: var(--text-base);
  font-weight: var(--font-medium);
  min-height: var(--touch-min);
  transition: background var(--duration-fast), color var(--duration-fast);
  position: relative;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
  user-select: none;
}
.mobile-menu__link:hover {
  background: rgba(255,255,255,0.04);
  color: var(--text-primary);
}
.mobile-menu__link.active {
  background: var(--teal-100);
  color: var(--teal-400);
  font-weight: var(--font-semibold);
}

/* Pro badge inline on nav items */
.pro-badge-inline {
  font-size: 9px;
  font-weight: var(--font-bold);
  background: rgba(79,172,254,0.15);
  color: var(--blue-400);
  border: 1px solid rgba(79,172,254,0.3);
  border-radius: 3px;
  padding: 2px 5px;
  margin-left: auto;
}

/* ── Sheet Footer ─────────────────────────────────────────── */
.mobile-menu__footer {
  padding: 12px 8px 24px;
  padding-bottom: max(24px, env(safe-area-inset-bottom));
  border-top: 1px solid var(--border-default);
  flex-shrink: 0;
  display: flex;
  gap: 8px;
}
.mobile-menu__footer button {
  flex: 1;
  padding: 10px;
  border-radius: var(--radius-md);
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  cursor: pointer;
  min-height: var(--touch-min);
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}
.mobile-menu__theme-btn {
  background: var(--bg-input);
  border: 1px solid var(--border-default);
  color: var(--text-secondary);
}
.mobile-menu__signout-btn {
  background: transparent;
  border: 1px solid rgba(239,68,68,0.3);
  color: var(--status-red);
}

/* ── Responsive: show mobile header below 768px, hide desktop nav ── */
@media (max-width: 767px) {
  .mobile-header { display: flex; }
  .desktop-nav { display: none !important; }
}
@media (min-width: 768px) {
  .mobile-header { display: none !important; }
  .mobile-menu-backdrop,
  .mobile-menu { display: none !important; }
}