/* ═══════════════════════════════════════════════════════════════════
   Papéli — Folha de Estilo Anos 80 🌸
   Um papel de carta bem rosinha, cheiroso de florzinhas e frufrus!
   ═══════════════════════════════════════════════════════════════════ */

/* Importar fontes vintage */
@import url('https://fonts.googleapis.com/css2?family=Sacramento&family=Playfair+Display:ital,wght@0,400;0,700;1,400&family=Nunito:wght@300;400;600;700&family=Source+Code+Pro:wght@400;600&display=swap');

/* ─── Variáveis de Cor ─── */
:root {
  --rosa-bebe:       #fff0f5;
  --rosa-suave:      #fde8ef;
  --rosa-papel:      #fff4f7;
  --rosa-chiclete:   #f48fb1;
  --rosa-framboesa:  #e91e8c;
  --rosa-vintage:    #c2185b;
  --rosa-escuro:     #880e4f;
  --rosa-pauta:      #f8c8da;
  --rosa-lace:       #fcd1e0;
  --menta-pastel:    #e8f5e9;
  --verde-folha:     #a5d6a7;
  --amarelo-creme:   #fffde7;
  --marrom-tinta:    #4a2c2a;
  --cinza-carimbo:   #b0bec5;
  --branco-papel:    #fffbfd;

  --fonte-titulo:    'Sacramento', cursive;
  --fonte-heading:   'Playfair Display', Georgia, serif;
  --fonte-corpo:     'Nunito', 'Segoe UI', sans-serif;
  --fonte-codigo:    'Source Code Pro', 'Fira Code', monospace;

  --sombra-papel:    0 4px 24px rgba(244, 143, 177, 0.20), 0 1px 4px rgba(194, 24, 91, 0.08);
  --sombra-cartao:   0 2px 16px rgba(233, 30, 140, 0.10), 0 1px 3px rgba(136, 14, 79, 0.08);
  --radius-suave:    16px;
  --radius-lace:     24px;
}

/* ─── Reset & Base ─── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--fonte-corpo);
  background-color: var(--rosa-bebe);
  color: var(--marrom-tinta);
  line-height: 1.7;
  min-height: 100vh;
  background-image:
    /* Linhas de pauta sutis */
    repeating-linear-gradient(
      transparent,
      transparent 27px,
      rgba(244, 143, 177, 0.18) 27px,
      rgba(244, 143, 177, 0.18) 28px
    );
  background-attachment: fixed;
}

/* ─── Borda Rendada (Lace Border) ─── */
.lace-top {
  width: 100%;
  height: 32px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='60' height='32'%3E%3Cellipse cx='10' cy='0' rx='10' ry='8' fill='%23fcd1e0'/%3E%3Cellipse cx='30' cy='0' rx='10' ry='8' fill='%23fcd1e0'/%3E%3Cellipse cx='50' cy='0' rx='10' ry='8' fill='%23fcd1e0'/%3E%3Cellipse cx='20' cy='0' rx='10' ry='10' fill='%23f48fb1'/%3E%3Cellipse cx='40' cy='0' rx='10' ry='10' fill='%23f48fb1'/%3E%3Cellipse cx='60' cy='0' rx='10' ry='10' fill='%23f48fb1'/%3E%3C/svg%3E");
  background-repeat: repeat-x;
  background-position: center bottom;
}

.lace-bottom {
  width: 100%;
  height: 32px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='60' height='32'%3E%3Cellipse cx='10' cy='32' rx='10' ry='8' fill='%23fcd1e0'/%3E%3Cellipse cx='30' cy='32' rx='10' ry='8' fill='%23fcd1e0'/%3E%3Cellipse cx='50' cy='32' rx='10' ry='8' fill='%23fcd1e0'/%3E%3Cellipse cx='20' cy='32' rx='10' ry='10' fill='%23f48fb1'/%3E%3Cellipse cx='40' cy='32' rx='10' ry='10' fill='%23f48fb1'/%3E%3Cellipse cx='60' cy='32' rx='10' ry='10' fill='%23f48fb1'/%3E%3C/svg%3E");
  background-repeat: repeat-x;
  background-position: center top;
}

/* ─── Header / Cabeçalho do Papel de Carta ─── */
header.site-header {
  background: linear-gradient(160deg, #fde8ef 0%, #ffc1d9 40%, #f48fb1 100%);
  border-bottom: 3px solid var(--rosa-chiclete);
  position: relative;
  overflow: hidden;
  padding: 0;
}

.header-inner {
  max-width: 900px;
  margin: 0 auto;
  padding: 2.5rem 2rem 1.5rem;
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

/* Cantoneiras florais decorativas no header */
header.site-header::before,
header.site-header::after {
  content: '';
  position: absolute;
  width: 140px;
  height: 140px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 140 140'%3E%3Ccircle cx='20' cy='20' r='10' fill='%23f8bbd0' opacity='0.6'/%3E%3Ccircle cx='40' cy='15' r='7' fill='%23f48fb1' opacity='0.5'/%3E%3Ccircle cx='15' cy='42' r='7' fill='%23f48fb1' opacity='0.5'/%3E%3Ccircle cx='60' cy='25' r='5' fill='%23fce4ec' opacity='0.7'/%3E%3Ccircle cx='25' cy='62' r='5' fill='%23fce4ec' opacity='0.7'/%3E%3Ccircle cx='35' cy='45' r='4' fill='%23e91e8c' opacity='0.3'/%3E%3Ccircle cx='75' cy='18' r='4' fill='%23c2185b' opacity='0.25'/%3E%3Ccircle cx='18' cy='75' r='4' fill='%23c2185b' opacity='0.25'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  opacity: 0.9;
  top: 0;
  z-index: 0;
}
header.site-header::before { left: 0; transform: none; }
header.site-header::after  { right: 0; transform: scaleX(-1); }

.logo-title {
  font-family: var(--fonte-titulo);
  font-size: clamp(3rem, 8vw, 5.5rem);
  color: var(--rosa-escuro);
  text-shadow:
    2px 2px 0 rgba(255,255,255,0.5),
    0 4px 16px rgba(136, 14, 79, 0.25);
  letter-spacing: 0.04em;
  line-height: 1;
  margin-bottom: 0.25rem;
}

.logo-subtitle {
  font-family: var(--fonte-heading);
  font-size: clamp(0.9rem, 2.5vw, 1.15rem);
  color: var(--rosa-vintage);
  font-style: italic;
  letter-spacing: 0.12em;
  margin-bottom: 1.2rem;
  opacity: 0.9;
}

/* Selos postais no header */
.header-stamps {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: 0.5rem;
}

/* ─── Navegação ─── */
nav.site-nav {
  background: var(--rosa-vintage);
  padding: 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(136, 14, 79, 0.2);
}

.nav-inner {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
}

nav.site-nav a {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: #fff;
  text-decoration: none;
  font-family: var(--fonte-corpo);
  font-weight: 600;
  font-size: 0.9rem;
  letter-spacing: 0.04em;
  padding: 0.7rem 1.2rem;
  transition: background 0.2s, color 0.2s;
  border-right: 1px solid rgba(255,255,255,0.15);
}
nav.site-nav a:last-child { border-right: none; }
nav.site-nav a:hover,
nav.site-nav a.active { background: var(--rosa-escuro); }

/* ─── Layout Principal ─── */
main {
  max-width: 900px;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
}

/* ─── Selos / Badges ─── */
.stamp {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-family: var(--fonte-corpo);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.35rem 0.85rem;
  border: 2px dashed currentColor;
  border-radius: 4px;
  position: relative;
  color: var(--rosa-vintage);
  background: var(--branco-papel);
  box-shadow: inset 0 0 0 2px var(--rosa-lace);
}
.stamp.rust    { color: #b7410e; border-color: #b7410e; }
.stamp.milter  { color: var(--rosa-escuro); border-color: var(--rosa-chiclete); }
.stamp.free    { color: #2e7d32; border-color: #a5d6a7; }

/* ─── Hero Section ─── */
.hero {
  background: var(--branco-papel);
  border: 2px solid var(--rosa-lace);
  border-radius: var(--radius-lace);
  padding: 2.5rem 2rem;
  margin: 2rem 0;
  box-shadow: var(--sombra-papel);
  position: relative;
  overflow: hidden;
}

/* Cantoneira floral no cartão */
.hero::before {
  content: '🌸';
  position: absolute;
  top: 1rem; right: 1rem;
  font-size: 2rem;
  opacity: 0.4;
  transform: rotate(15deg);
}
.hero::after {
  content: '💐';
  position: absolute;
  bottom: 1rem; left: 1rem;
  font-size: 1.8rem;
  opacity: 0.35;
  transform: rotate(-10deg);
}

.hero-headline {
  font-family: var(--fonte-heading);
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  color: var(--rosa-escuro);
  margin-bottom: 1rem;
  line-height: 1.3;
}
.hero-headline em {
  font-style: italic;
  color: var(--rosa-framboesa);
}

.hero-description {
  font-size: 1.05rem;
  color: var(--marrom-tinta);
  max-width: 640px;
  margin-bottom: 1.5rem;
  opacity: 0.85;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  align-items: center;
}

/* ─── Botões ─── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--fonte-corpo);
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.03em;
  text-decoration: none;
  padding: 0.7rem 1.5rem;
  border-radius: 30px;
  transition: transform 0.15s, box-shadow 0.15s, background 0.15s;
  cursor: pointer;
  border: none;
}
.btn-primary {
  background: linear-gradient(135deg, var(--rosa-framboesa), var(--rosa-vintage));
  color: #fff;
  box-shadow: 0 4px 14px rgba(233, 30, 140, 0.30);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(233, 30, 140, 0.40);
}
.btn-secondary {
  background: var(--branco-papel);
  color: var(--rosa-vintage);
  border: 2px solid var(--rosa-chiclete);
}
.btn-secondary:hover {
  background: var(--rosa-suave);
  transform: translateY(-2px);
}

/* ─── Cards de Features ─── */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.25rem;
  margin: 2rem 0;
}

.feature-card {
  background: var(--branco-papel);
  border: 1.5px solid var(--rosa-lace);
  border-radius: var(--radius-suave);
  padding: 1.5rem 1.25rem;
  box-shadow: var(--sombra-cartao);
  position: relative;
  transition: transform 0.2s, box-shadow 0.2s;
}
.feature-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(244, 143, 177, 0.25);
}
/* Washi-tape decorativo no topo do cartão */
.feature-card::before {
  content: '';
  position: absolute;
  top: -6px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 12px;
  background: linear-gradient(90deg, #fde8ef, #f48fb1 50%, #fde8ef);
  border-radius: 3px;
  opacity: 0.85;
  box-shadow: 0 1px 3px rgba(194, 24, 91, 0.2);
}

.feature-icon {
  font-size: 2.2rem;
  display: block;
  margin-bottom: 0.75rem;
}
.feature-card h3 {
  font-family: var(--fonte-heading);
  font-size: 1.05rem;
  color: var(--rosa-escuro);
  margin-bottom: 0.4rem;
}
.feature-card p {
  font-size: 0.9rem;
  color: var(--marrom-tinta);
  opacity: 0.8;
  line-height: 1.6;
}

/* ─── Diagrama de Fluxo ─── */
.flow-section {
  background: var(--branco-papel);
  border: 2px solid var(--rosa-lace);
  border-radius: var(--radius-lace);
  padding: 2rem 1.5rem;
  margin: 2rem 0;
  box-shadow: var(--sombra-papel);
  text-align: center;
}

.flow-title {
  font-family: var(--fonte-titulo);
  font-size: 2rem;
  color: var(--rosa-escuro);
  margin-bottom: 1.25rem;
}

.flow-chain {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-size: 0.85rem;
}

.flow-node {
  background: linear-gradient(135deg, var(--rosa-suave), var(--rosa-lace));
  border: 1.5px solid var(--rosa-chiclete);
  border-radius: 10px;
  padding: 0.6rem 1rem;
  font-weight: 600;
  color: var(--rosa-escuro);
  font-size: 0.82rem;
  white-space: nowrap;
}
.flow-node.highlight {
  background: linear-gradient(135deg, var(--rosa-framboesa), var(--rosa-vintage));
  color: #fff;
  border-color: var(--rosa-escuro);
  box-shadow: 0 2px 10px rgba(233, 30, 140, 0.25);
  font-size: 0.9rem;
}
.flow-arrow {
  color: var(--rosa-chiclete);
  font-size: 1.3rem;
  font-weight: bold;
}

/* ─── Demonstrador Antes & Depois ─── */
.demo-section {
  margin: 2rem 0;
}

.demo-section-title {
  font-family: var(--fonte-titulo);
  font-size: 2.2rem;
  color: var(--rosa-escuro);
  text-align: center;
  margin-bottom: 1.5rem;
}

.demo-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}
@media (max-width: 640px) {
  .demo-grid { grid-template-columns: 1fr; }
}

.demo-panel {
  border-radius: var(--radius-suave);
  overflow: hidden;
  box-shadow: var(--sombra-cartao);
}

.demo-panel-header {
  padding: 0.6rem 1rem;
  font-weight: 700;
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.demo-panel.before .demo-panel-header {
  background: #eceff1;
  color: #546e7a;
}
.demo-panel.after .demo-panel-header {
  background: linear-gradient(90deg, var(--rosa-framboesa), var(--rosa-vintage));
  color: #fff;
}

.demo-panel-body {
  background: var(--branco-papel);
  border: 1.5px solid var(--rosa-lace);
  border-top: none;
  padding: 1.25rem;
  font-size: 0.82rem;
  font-family: var(--fonte-codigo);
  line-height: 1.7;
  color: var(--marrom-tinta);
  overflow-x: auto;
  min-height: 180px;
}
.demo-panel.before .demo-panel-body {
  background: #fafafa;
  border-color: #cfd8dc;
}
.demo-panel.after .demo-panel-body {
  background: var(--branco-papel);
  border-color: var(--rosa-lace);
}

.email-card-preview {
  border: 1px solid var(--rosa-pauta);
  border-radius: 10px;
  overflow: hidden;
  font-family: var(--fonte-corpo);
}
.email-card-preview .email-header-bar {
  background: linear-gradient(90deg, var(--rosa-suave), #ffd6e8);
  border-bottom: 1px solid var(--rosa-pauta);
  padding: 0.6rem 0.9rem;
  font-size: 0.78rem;
  color: var(--rosa-vintage);
}
.email-card-preview .email-body {
  padding: 0.9rem;
  font-size: 0.84rem;
  color: var(--marrom-tinta);
  background: var(--branco-papel);
}
.email-sig {
  border-top: 1px solid var(--rosa-pauta);
  margin-top: 0.75rem;
  padding-top: 0.75rem;
  font-size: 0.78rem;
  color: var(--rosa-escuro);
}

/* ─── Seções de Conteúdo ─── */
.section-wrapper {
  margin: 3rem 0;
}

.section-title {
  font-family: var(--fonte-titulo);
  font-size: 2.5rem;
  color: var(--rosa-escuro);
  text-align: center;
  margin-bottom: 0.3rem;
  line-height: 1.2;
}

.section-subtitle {
  font-family: var(--fonte-heading);
  font-style: italic;
  font-size: 1rem;
  color: var(--rosa-framboesa);
  text-align: center;
  margin-bottom: 1.5rem;
}

/* ─── Papel de carta para conteúdo doc ─── */
.letter-paper {
  background: var(--branco-papel);
  border: 2px solid var(--rosa-lace);
  border-radius: var(--radius-lace);
  padding: 2rem 2.5rem;
  box-shadow: var(--sombra-papel);
  position: relative;
}

/* Furos de fichário */
.letter-paper.binder::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 48px;
  background: linear-gradient(90deg, var(--rosa-suave) 0%, var(--rosa-lace) 100%);
  border-right: 2px solid var(--rosa-pauta);
  border-radius: var(--radius-lace) 0 0 var(--radius-lace);
}

/* Linha vermelha da margem (como papel pautado) */
.letter-paper.lined::after {
  content: '';
  position: absolute;
  left: 56px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: rgba(244, 143, 177, 0.3);
}

/* ─── Blocos de Código ─── */
pre, code {
  font-family: var(--fonte-codigo);
}

pre {
  background: linear-gradient(135deg, #1a0a0f, #2d1020);
  color: #ffb3c6;
  border-radius: 12px;
  padding: 1.25rem 1.5rem;
  overflow-x: auto;
  font-size: 0.84rem;
  line-height: 1.75;
  border: 1px solid rgba(244, 143, 177, 0.25);
  box-shadow: inset 0 0 30px rgba(233, 30, 140, 0.05), 0 2px 12px rgba(0,0,0,0.2);
  margin: 1rem 0;
  position: relative;
}

/* Prompt decorado */
pre::before {
  content: '🌸 papeli';
  display: block;
  color: rgba(244, 143, 177, 0.4);
  font-size: 0.72rem;
  margin-bottom: 0.6rem;
  letter-spacing: 0.1em;
}

code {
  background: rgba(244, 143, 177, 0.15);
  color: var(--rosa-escuro);
  border-radius: 4px;
  padding: 0.15em 0.45em;
  font-size: 0.9em;
  border: 1px solid rgba(244, 143, 177, 0.2);
}

pre code {
  background: none;
  color: inherit;
  padding: 0;
  border: none;
  font-size: 1em;
}

/* ─── Headings ─── */
h1, h2, h3, h4 { line-height: 1.3; }

h2 {
  font-family: var(--fonte-heading);
  font-size: 1.6rem;
  color: var(--rosa-escuro);
  margin: 2rem 0 0.8rem;
  padding-bottom: 0.4rem;
  border-bottom: 2px dashed var(--rosa-lace);
}
h2::before { content: '🌷 '; }

h3 {
  font-family: var(--fonte-heading);
  font-size: 1.15rem;
  color: var(--rosa-vintage);
  margin: 1.5rem 0 0.5rem;
}

p { margin-bottom: 0.8rem; }

/* ─── Listas ─── */
ul, ol {
  padding-left: 1.5rem;
  margin-bottom: 0.8rem;
}
li { margin-bottom: 0.3rem; }
li::marker { color: var(--rosa-chiclete); }

/* ─── Blocos de Callout ─── */
.callout {
  border-radius: 12px;
  padding: 1rem 1.25rem;
  margin: 1.25rem 0;
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
  font-size: 0.92rem;
}
.callout-icon { font-size: 1.3rem; flex-shrink: 0; }
.callout.info    { background: #e3f2fd; border-left: 4px solid #90caf9; }
.callout.warning { background: #fff8e1; border-left: 4px solid #ffe082; }
.callout.tip     { background: var(--menta-pastel); border-left: 4px solid var(--verde-folha); }
.callout.pink    { background: var(--rosa-suave); border-left: 4px solid var(--rosa-chiclete); }

/* ─── Tabs de Configuração ─── */
.tabs { margin: 1.5rem 0; }

.tab-buttons {
  display: flex;
  gap: 0;
  border-bottom: 2px solid var(--rosa-lace);
}

.tab-btn {
  padding: 0.6rem 1.1rem;
  background: none;
  border: none;
  border-bottom: 3px solid transparent;
  margin-bottom: -2px;
  font-family: var(--fonte-corpo);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--rosa-chiclete);
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s;
}
.tab-btn:hover { color: var(--rosa-vintage); }
.tab-btn.active {
  color: var(--rosa-escuro);
  border-bottom-color: var(--rosa-framboesa);
}

.tab-panel { display: none; padding-top: 1rem; }
.tab-panel.active { display: block; }

/* ─── Table ─── */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
  font-size: 0.88rem;
}
th {
  background: linear-gradient(90deg, var(--rosa-suave), var(--rosa-lace));
  color: var(--rosa-escuro);
  font-family: var(--fonte-heading);
  font-weight: 700;
  padding: 0.6rem 0.9rem;
  text-align: left;
  border-bottom: 2px solid var(--rosa-pauta);
}
td {
  padding: 0.55rem 0.9rem;
  border-bottom: 1px solid var(--rosa-lace);
  vertical-align: top;
}
tr:hover td { background: var(--rosa-suave); }
td code { font-size: 0.82rem; }

/* ─── Footer ─── */
footer.site-footer {
  background: linear-gradient(160deg, #880e4f, #c2185b);
  color: rgba(255,255,255,0.9);
  padding: 0;
  margin-top: 4rem;
}

.footer-inner {
  max-width: 900px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
  text-align: center;
}

.footer-logo {
  font-family: var(--fonte-titulo);
  font-size: 2.5rem;
  color: #fde8ef;
  margin-bottom: 0.5rem;
  text-shadow: 0 2px 8px rgba(0,0,0,0.2);
}

.footer-tagline {
  font-family: var(--fonte-heading);
  font-style: italic;
  font-size: 0.95rem;
  opacity: 0.8;
  margin-bottom: 1.25rem;
}

.footer-links {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}

.footer-links a {
  color: #ffc1d9;
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  transition: color 0.2s;
}
.footer-links a:hover { color: #fff; }

.footer-copy {
  font-size: 0.78rem;
  opacity: 0.55;
  margin-top: 1rem;
}

/* ─── Envelope animado ─── */
.envelope-wrapper {
  display: flex;
  justify-content: center;
  margin: 1.5rem 0;
}

.envelope {
  width: 110px;
  height: 76px;
  position: relative;
  cursor: pointer;
}

.envelope-body {
  width: 100%;
  height: 100%;
  background: linear-gradient(160deg, #fde8ef, #ffc1d9);
  border-radius: 4px;
  border: 2px solid var(--rosa-chiclete);
  position: absolute;
  top: 0; left: 0;
}

.envelope-flap {
  width: 0;
  height: 0;
  border-left: 55px solid transparent;
  border-right: 55px solid transparent;
  border-top: 38px solid var(--rosa-chiclete);
  position: absolute;
  top: -1px; left: -1px;
  z-index: 2;
  transform-origin: top center;
  transition: transform 0.4s ease;
}

.envelope:hover .envelope-flap {
  transform: rotateX(-160deg);
}

.envelope-letter {
  width: 80%;
  height: 65%;
  background: var(--branco-papel);
  border-radius: 2px;
  border: 1px solid var(--rosa-lace);
  position: absolute;
  bottom: 8px;
  left: 10%;
  z-index: 1;
  transition: transform 0.4s ease 0.1s;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.55rem;
  color: var(--rosa-chiclete);
  font-family: var(--fonte-titulo);
}
.envelope:hover .envelope-letter {
  transform: translateY(-28px);
}

/* ─── Assinatura dupla explicação ─── */
.sig-demo-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin: 1.25rem 0;
}
@media (max-width: 600px) {
  .sig-demo-wrapper { grid-template-columns: 1fr; }
}

.sig-card {
  border-radius: 12px;
  padding: 1.1rem;
  border: 1.5px solid var(--rosa-lace);
  background: var(--branco-papel);
  font-size: 0.84rem;
  color: var(--marrom-tinta);
  box-shadow: var(--sombra-cartao);
}
.sig-card h4 {
  font-family: var(--fonte-heading);
  color: var(--rosa-escuro);
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}
.sig-card.long { border-left: 4px solid var(--rosa-framboesa); }
.sig-card.short { border-left: 4px solid var(--verde-folha); }
.sig-content {
  font-family: var(--fonte-codigo);
  font-size: 0.79rem;
  background: var(--rosa-bebe);
  border-radius: 6px;
  padding: 0.5rem 0.75rem;
  color: #4a2c2a;
  line-height: 1.6;
}

/* ─── Responsivo ─── */
@media (max-width: 768px) {
  main { padding: 1rem 1rem 3rem; }
  .letter-paper { padding: 1.5rem 1.25rem; }
  .letter-paper.binder::before { display: none; }
  .letter-paper.lined::after { display: none; }
  nav.site-nav a { padding: 0.65rem 0.75rem; font-size: 0.82rem; }
  .logo-title { font-size: 3.5rem; }
}

@media (max-width: 480px) {
  .features-grid { grid-template-columns: 1fr; }
  .nav-inner { justify-content: flex-start; overflow-x: auto; }
}

/* ─── Utilitários ─── */
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.text-center { text-align: center; }
.text-muted { opacity: 0.65; }
.floral-divider {
  text-align: center;
  font-size: 1.5rem;
  margin: 2rem 0;
  color: var(--rosa-chiclete);
  letter-spacing: 0.5rem;
  opacity: 0.7;
}