/* Header fixo, estilo UnaZap: transparente no topo, escurece ao rolar */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: transparent;
  backdrop-filter: none;
  transition: background .3s, box-shadow .3s, border-color .3s, backdrop-filter .3s;
}

.header.scrolled {
  background: var(--nav-bg);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--nav-border);
  box-shadow: var(--shadow-lg);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text);
  flex-shrink: 0;
}

.logo-img {
  width: 32px;
  height: 32px;
  object-fit: contain;
  border-radius: 10px;
}

.logo-text {
  letter-spacing: -.01em;
}

/* Navigation */
.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-links a {
  font-size: .875rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color .2s;
}

.nav-links a:hover {
  color: var(--text);
}

/* Dropdown "Sistema" estilo UnaZap */
.nav-dropdown {
  position: relative;
}

.nav-dropdown-toggle {
  display: inline-flex;
  align-items: center;
  gap: .375rem;
  padding: .375rem .75rem;
  border-radius: .75rem;
  font-weight: 700;
  font-size: .875rem;
  color: var(--text);
  border: 1px solid var(--border);
  background: var(--surface-soft);
  cursor: pointer;
  transition: background .15s, border-color .15s;
  font-family: inherit;
}

.nav-dropdown-toggle:hover {
  background: var(--surface);
  border-color: var(--primary);
}

.nav-dropdown-caret {
  width: 14px;
  height: 14px;
  transition: transform .2s;
}

.nav-dropdown.open .nav-dropdown-caret {
  transform: rotate(180deg);
}

.nav-dropdown-menu {
  position: absolute;
  left: 0;
  top: calc(100% + 12px);
  min-width: 210px;
  padding: 8px 0;
  border-radius: 1rem;
  background: var(--surface);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px);
  transition: opacity .18s, transform .18s, visibility .18s;
  z-index: 120;
}

.nav-dropdown.open .nav-dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.nav-dropdown-menu a {
  display: block;
  padding: 8px 16px;
  font-size: .875rem;
  color: var(--text-secondary);
  transition: background .15s, color .15s;
  font-weight: 500;
}

.nav-dropdown-menu a:hover {
  background: var(--primary-soft);
  color: var(--primary);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Button system global */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: 12px;
  font-weight: 600;
  font-size: .9rem;
  border: none;
  cursor: pointer;
  transition: all .2s;
  font-family: inherit;
  white-space: nowrap;
}

.btn:active { transform: scale(.97); }

.btn-primary {
  background: var(--primary);
  color: var(--primary-text);
}

.btn-primary:hover {
  background: var(--primary-hover);
  box-shadow: 0 4px 16px rgba(47, 191, 130, .3);
}

[data-theme="dark"] .btn-primary:hover {
  box-shadow: 0 4px 16px rgba(52, 211, 153, .3);
}

.btn-secondary {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--primary-soft);
}

.btn-lg {
  padding: 14px 32px;
  font-size: 1rem;
  border-radius: 1rem;
}

.btn-sm {
  padding: 7px 14px;
  font-size: .82rem;
  border-radius: .5rem;
}

/* CTA navbar com gradiente UnaZap */
.btn-navbar-cta {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: .5rem 1.125rem;
  font-size: .875rem;
  font-weight: 600;
  line-height: 1.25rem;
  border-radius: .75rem;
  color: var(--primary-text);
  overflow: hidden;
  white-space: nowrap;
  background: linear-gradient(135deg, var(--primary), var(--primary-hover));
  border: none;
  box-shadow: 0 4px 16px rgba(47, 191, 130, .28);
  transition: transform .2s, box-shadow .2s;
  font-family: inherit;
  cursor: pointer;
  text-decoration: none;
}

[data-theme="dark"] .btn-navbar-cta {
  background: linear-gradient(135deg, var(--primary), var(--primary-hover));
  box-shadow: 0 4px 16px rgba(52, 211, 153, .28);
}

.btn-navbar-cta::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(-75deg, transparent 20%, rgba(255, 255, 255, .18) 50%, transparent 80%);
  background-size: 250% 100%;
  animation: btn-shine 3.5s ease-in-out infinite;
  pointer-events: none;
}

.btn-navbar-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 24px rgba(47, 191, 130, .4);
}

[data-theme="dark"] .btn-navbar-cta:hover {
  box-shadow: 0 6px 24px rgba(52, 211, 153, .4);
}

@keyframes btn-shine {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

/* Theme toggle */
.theme-toggle {
  position: relative;
  width: 48px;
  height: 28px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: linear-gradient(135deg, #fef3c7, #fde68a);
  cursor: pointer;
  transition: var(--transition);
  overflow: hidden;
  flex-shrink: 0;
}

[data-theme="dark"] .theme-toggle {
  background: linear-gradient(135deg, #1e2749, #12162b);
  border-color: var(--border);
}

.theme-toggle-thumb {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 1px 4px rgba(0, 0, 0, .2);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform .35s cubic-bezier(.4, 0, .2, 1), background .35s;
}

[data-theme="dark"] .theme-toggle-thumb {
  transform: translateX(20px);
  background: #1e293b;
}

.theme-icon {
  width: 12px;
  height: 12px;
}

.theme-icon-sun { color: #f59e0b; transition: opacity .3s; }
.theme-icon-moon { position: absolute; color: #c7d2fe; opacity: 0; transition: opacity .3s; }

[data-theme="dark"] .theme-icon-sun { opacity: 0; }
[data-theme="dark"] .theme-icon-moon { opacity: 1; }

[data-theme="light"] .theme-toggle-thumb { background: #fff; transform: none; }
[data-theme="light"] .theme-icon-sun { color: #f59e0b; opacity: 1; }
[data-theme="light"] .theme-icon-moon { opacity: 0; }

/* Mobile menu button */
.mobile-menu-btn {
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--border);
  border-radius: .75rem;
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  transition: var(--transition);
}

.mobile-menu-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.mobile-menu-icon {
  width: 18px;
  height: 14px;
  position: relative;
}

.mobile-menu-icon span {
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  transition: all .25s ease;
}

.mobile-menu-icon span:nth-child(1) { top: 0; }
.mobile-menu-icon span:nth-child(2) { top: 6px; }
.mobile-menu-icon span:nth-child(3) { top: 12px; }

.mobile-menu-btn[aria-expanded="true"] .mobile-menu-icon span:nth-child(1) {
  top: 6px;
  transform: rotate(45deg);
}

.mobile-menu-btn[aria-expanded="true"] .mobile-menu-icon span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-btn[aria-expanded="true"] .mobile-menu-icon span:nth-child(3) {
  top: 6px;
  transform: rotate(-45deg);
}

/* Mobile drawer */
.mobile-drawer {
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--bg);
  z-index: 99;
  transform: translateY(-100%);
  opacity: 0;
  pointer-events: none;
  transition: transform .3s cubic-bezier(.4, 0, .2, 1), opacity .3s;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  overflow-y: auto;
}

.mobile-drawer.open {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}

/* `> a` (não `a`) de propósito: só os links de navegação, que são filhos diretos do drawer. Antes
   isto era `.mobile-drawer a`, cuja especificidade (0,1,1) vence a de `.btn-primary`/`.btn-navbar-cta`
   (0,1,0) — o `color: var(--text-secondary)` acabava pintando o TEXTO dos botões de ação de cinza
   por cima do fundo verde ("Criar conta"/"VER PLANOS" ilegíveis no celular, prateados no tema
   escuro, onde --text-secondary é #a0a8b8). O `display:block` daqui também derrubava o
   `inline-flex` deles, desalinhando o rótulo pra esquerda mesmo com `justify-content:center`. */
.mobile-drawer > a {
  display: block;
  padding: 14px 16px;
  border-radius: 12px;
  font-weight: 600;
  font-size: 1rem;
  color: var(--text-secondary);
  transition: var(--transition);
}

.mobile-drawer > a:hover {
  background: var(--primary-soft);
  color: var(--primary);
}

.mobile-drawer-actions {
  margin-top: auto;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* Alvos de toque generosos (>=48px) e rótulo sempre centralizado — no celular estes três são a
   ação principal da página, não podem ficar do tamanho de um botão de barra de navegação. */
.mobile-drawer-actions .btn,
.mobile-drawer-actions .btn-navbar-cta {
  display: flex;
  width: 100%;
  min-height: 48px;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 13px 20px;
  font-size: .95rem;
  border-radius: 12px;
}

/* Reafirma o contraste do texto sobre o preenchimento verde, independente de qualquer regra de
   link herdada no drawer (era exatamente aqui que "Criar conta"/"VER PLANOS" saíam cinza). */
.mobile-drawer-actions .btn-primary,
.mobile-drawer-actions .btn-navbar-cta {
  color: var(--primary-text);
}

/* "Entrar" é o secundário: contorno legível, sem competir com os dois preenchidos acima. */
.mobile-drawer-actions .btn-secondary {
  color: var(--text);
  border: 1px solid var(--border);
}

.mobile-backdrop {
  position: fixed;
  inset: 0;
  top: 64px;
  background: rgba(0, 0, 0, .4);
  z-index: 98;
  opacity: 0;
  pointer-events: none;
  transition: opacity .3s;
}

.mobile-backdrop.open {
  opacity: 1;
  pointer-events: auto;
}