/* ==============================================
   1. VARIÁVEIS DE TEMA (MANTIDAS DO SEU PADRÃO)
   ============================================= */
:root {
  color-scheme: light;
  --bg-color: #f8fafc;
  --bg-color-hover: #dce1e6;
  --text-color: #334155;
  --bg-color-section: #ffffff;
  --bg-color-card: #f1f5f9;
  --bg-color-input-text: #1e293b;
  --texto-study: #0f172a;
  --bg-color-button-active: #3f63f5;
  --bg-color-button-active-hover: #1743f3;
  --bg-color-badge-card: #e0e7ff;
  --text-badge-card: #3f63f5;
  --scroll-track: #f1f5f9;
  --scroll-thumb: #cbd5e1;
  --scroll-thumb-hover: #94a3b8;
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --bg-color: #121314;
    --bg-color-hover: #35383b;
    --text-color: #e0e0e0;
    --bg-color-section: #191a1b;
    --bg-color-card: #242526;
    --bg-color-input-text: #ffffff;
    --texto-study: #ffffff;
    --bg-color-button-active: #3f63f5;
    --bg-color-button-active-hover: #1743f3;
    --bg-color-badge-card: #202020;
    --text-badge-card: #3f63f5;
    --scroll-track: #121314;
    --scroll-thumb: #242526;
    --scroll-thumb-hover: #494c4e;
  }
}

/* Lógica de inversão pelo clique do seu checkbox de tema */
@media (prefers-color-scheme: light), (prefers-color-scheme: no-preference) {
  :root:has(.theme-checkbox:checked) {
    color-scheme: dark;
    --bg-color: #121314;
    --bg-color-hover: #35383b;
    --text-color: #e0e0e0;
    --bg-color-section: #191a1b;
    --bg-color-card: #242526;
    --bg-color-input-text: #ffffff;
    --texto-study: #ffffff;
    --bg-color-button-active: #3ff56c;
    --bg-color-button-active-hover: #1743f3;
    --bg-color-badge-card: #202020;
    --text-badge-card: #3f63f5;
  }
}

@media (prefers-color-scheme: dark) {
  :root:has(.theme-checkbox:checked) {
    color-scheme: light;
    --bg-color: #f8fafc;
    --bg-color-hover: #dce1e6;
    --text-color: #334155;
    --bg-color-section: #ffffff;
    --bg-color-card: #f1f5f9;
    --bg-color-input-text: #1e293b;
    --texto-study: #0f172a;
    --bg-color-button-active: #3f63f5;
    --bg-color-button-active-hover: #1743f3;
    --bg-color-badge-card: #e0e7ff;
    --text-badge-card: #3f63f5;
  }
}

/* ==============================================
   2. ESTILIZAÇÃO COMPLEMENTAR DA PÁGINA DE CONTATO
   ============================================= */
body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Estrutura superior */
.nav-header {
    max-width: 580px;
    margin: 60px auto 0 auto;
    padding: 0 20px;
}

.btn-back {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: none;
    border: none;
    color: var(--text-color);
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 500;
    padding: 8px 12px;
    border-radius: 6px;
    transition: background-color 0.2s;
}

.btn-back:hover {
    background-color: var(--bg-color-hover);
}

/* Container Centralizado Menor (Ideal para formulários/contatos simples) */
main {
    max-width: 580px;
    margin: 20px auto 60px auto;
    padding: 40px;
    background-color: var(--bg-color-section);
    border-radius: 12px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    text-align: center;
    transition: background-color 0.3s ease;
}

/* Cabeçalho da área de contato */
.contact-header {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    margin-bottom: 24px;
}

.icon-mail {
    background-color: var(--bg-color-badge-card);
    color: var(--text-badge-card);
    padding: 16px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.contact-header h1 {
    color: var(--texto-study);
    font-size: 2rem;
    font-weight: 800;
    margin: 0;
    letter-spacing: -0.025em;
}

/* Seção de Texto */
.contact-content p {
    font-size: 1.05rem;
    color: var(--text-color);
    margin: 0 0 16px 0;
}

/* Botão de Link de E-mail Interativo */
.email-button {
    display: inline-block;
    background-color: var(--bg-color-card);
    color: var(--texto-study);
    text-decoration: none;
    font-size: 1.2rem;
    font-weight: 700;
    padding: 16px 32px;
    border-radius: 8px;
    margin: 20px 0;
    border: 2px solid transparent;
    transition: background-color 0.2s, border-color 0.2s, transform 0.1s;
}

.email-button:hover {
    background-color: var(--bg-color-hover);
    border-color: var(--bg-color-button-active);
}

.email-button:active {
    transform: scale(0.98);
}

/* Rodapé */
.contact-footer {
    margin-top: 32px;
    padding-top: 20px;
    border-top: 1px dashed var(--bg-color-card);
    font-size: 0.9rem;
    color: var(--text-color);
    opacity: 0.7;
}

/* Responsividade */
@media (max-width: 640px) {
    .nav-header { margin-top: 20px; }
    main { margin: 10px 20px; padding: 24px; }
    .contact-header h1 { font-size: 1.6rem; }
    .email-button { width: 100%; box-sizing: border-box; padding: 16px 12px; font-size: 1.05rem; }
}

/* ==============================================
   3. ADIÇÃO PARA O EFEITO DE COPIADO
   ============================================= */

/* Estado quando o botão for clicado e o e-mail for copiado */
.email-button.copied {
    background-color: var(--bg-color-badge-card) !important;
    color: var(--text-badge-card) !important;
    border-color: var(--text-badge-card) !important;
    animation: pulse 0.3s ease-in-out;
}

/* Pequena animação de pulso ao clicar */
@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.03); }
    100% { transform: scale(1); }
}