/* ============================================================
   layout.css — Header, Navigation, Bottom Tab Bar, App Shell
   ============================================================ */

/* ── App Container ───────────────────────────────────────── */
.app-container {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* ── Header ──────────────────────────────────────────────── */
#appHeader {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 2rem;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 1px 0 var(--border), 0 4px 20px rgba(0, 0, 0, 0.05);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-head);
  font-size: 1.6rem;
  font-weight: 800;
  cursor: pointer;
  user-select: none;
  text-decoration: none;
  color: var(--text);
}

.logo:hover { color: var(--text); }

.logo-icon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
}

.logo-smash { color: var(--text); }
.logo-dot { color: var(--accent); }

.header-right {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

/* ── Desktop Navigation ──────────────────────────────────── */
.header-nav {
  display: flex;
  gap: 0.5rem;
}

.nav-link {
  font-size: 0.85rem;
  font-weight: 500;
  padding: 0.5rem 0.9rem;
  border-radius: var(--radius-md);
  color: var(--muted);
  border: 1px solid transparent;
  text-decoration: none;
  transition: var(--transition);
  white-space: nowrap;
}

.nav-link:hover {
  color: var(--text);
  background: var(--surface2);
}

.nav-link.active {
  color: var(--accent);
  background: rgba(0, 229, 160, 0.08);
  border-color: rgba(0, 229, 160, 0.2);
}

/* ── User Pill & Profile ─────────────────────────────────── */
.user-pill {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.4rem 0.8rem;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 999px;
  cursor: pointer;
  position: relative;
  transition: var(--transition);
}

.user-pill:hover { border-color: var(--accent); }

.user-avatar {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--accent);
  color: #0d1117;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.8rem;
  overflow: hidden;
}

.user-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.user-name {
  font-size: 0.85rem;
  font-weight: 500;
  max-width: 120px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.user-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  width: 220px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 0.5rem;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
  display: none;
  flex-direction: column;
  z-index: 110;
}

.user-menu.active { display: flex; }

.user-menu-item {
  padding: 0.6rem 1rem;
  font-size: 0.85rem;
  border-radius: var(--radius-md);
  text-align: left;
  background: transparent;
  border: none;
  cursor: pointer;
  transition: var(--transition);
}

.user-menu-item:hover { background: var(--surface2); }
.user-menu-item.danger { color: var(--accent2); }
.user-menu-item.danger:hover { background: rgba(255, 107, 107, 0.08); }

.user-menu-email {
  font-size: 0.75rem;
  color: var(--muted);
  word-break: break-all;
  pointer-events: none;
}

.user-menu-sep {
  height: 1px;
  background: var(--border);
  margin: 0.4rem 0;
}

/* ── Theme Toggle ────────────────────────────────────────── */
.theme-toggle {
  background: var(--surface2);
  border: 1px solid var(--border);
  font-size: 1.1rem;
  padding: 0.4rem 0.6rem;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition);
}

.theme-toggle:hover { border-color: var(--accent); }

/* ── Hamburger (hidden on desktop) ───────────────────────── */
.btn-hamburger {
  display: none;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  cursor: pointer;
}

.btn-hamburger span {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.btn-hamburger span::before,
.btn-hamburger span::after,
.btn-hamburger span span {
  content: '';
  width: 16px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: var(--transition);
}

/* ── Mobile Bottom Tab Bar ───────────────────────────────── */
.bottom-nav {
  display: none; /* shown on mobile via media query */
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 200;
  background: var(--surface);
  border-top: 1px solid var(--border);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  padding: 0.4rem 0.25rem;
  padding-bottom: calc(0.4rem + env(safe-area-inset-bottom, 0px));
}

.bottom-nav-inner {
  display: flex;
  justify-content: space-around;
  align-items: center;
  max-width: 500px;
  margin: 0 auto;
}

.bottom-nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.15rem;
  padding: 0.35rem 0.5rem;
  border-radius: var(--radius-md);
  text-decoration: none;
  color: var(--muted);
  font-size: 0.65rem;
  font-weight: 600;
  transition: var(--transition);
  min-width: 52px;
  border: none;
  background: none;
  cursor: pointer;
}

.bottom-nav-item .nav-icon {
  font-size: 1.25rem;
  line-height: 1;
}

.bottom-nav-item:hover,
.bottom-nav-item.active {
  color: var(--accent);
}

.bottom-nav-item.active {
  background: rgba(0, 229, 160, 0.08);
}

/* ── Responsive Breakpoints ──────────────────────────────── */

/* Tablet & below: show hamburger, hide desktop nav */
@media (max-width: 768px) {
  header {
    padding: 0.8rem 1rem;
  }

  .header-right {
    gap: 0.6rem;
  }

  .btn-hamburger {
    display: flex;
  }

  .header-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: var(--surface);
    flex-direction: column;
    padding: 0.75rem;
    border-bottom: 1px solid var(--border);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
    gap: 0.25rem;
  }

  .header-nav.active {
    display: flex;
  }

  .user-name {
    display: none;
  }

  /* Show bottom nav on mobile */
  .bottom-nav {
    display: block;
  }

  /* Add bottom padding to page content for bottom nav */
  .page-content {
    padding-bottom: 5.5rem;
  }

  .page-header h2 {
    font-size: 1.6rem;
  }
}

/* Small phones */
@media (max-width: 480px) {
  .page-content {
    padding: 1.5rem 1rem 5.5rem;
  }

  .page-header h2 {
    font-size: 1.4rem;
  }
}

/* Hide page contents while checking auth state */
#appHeader.hidden ~ .page-content,
#appHeader.hidden ~ .bottom-nav {
  display: none !important;
}