@import url('https://fonts.googleapis.com/css2?family=DM+Serif+Display&family=DM+Sans:wght@300;400;500;600&display=swap');

*, *::before, *::after {
  box-sizing: border-box;
}

:root {
  --bg: #000;
  --surface: #0f0f0f;
  --surface-2: #1a1a1a;
  --border: rgba(255,255,255,0.1);
  --text: #f5f5f5;
  --text-muted: rgba(255,255,255,0.45);
  --accent: #ffffff;
  --radius: 10px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
  font-family: 'DM Sans', sans-serif;
  background-color: var(--bg);
  color: var(--text);
  margin: 0;
  padding: 0;
  min-height: 100vh;
  line-height: 1.6;
}

/* ── Logo ── */
img {
  display: block;
  margin: 40px auto 0;
  width: 90px;
  height: auto;
  opacity: 0.9;
}

/* ── Nav ── */
.nav {
  display: flex;
  flex-direction: row;
  justify-content: center;
  align-items: center;
  gap: 8px;
  margin: 28px auto 0;
  flex-wrap: wrap;
  padding: 0 16px;
}

.nav a {
  text-decoration: none;
  color: var(--text-muted);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.04em;
  padding: 8px 18px;
  border: 1px solid var(--border);
  border-radius: 999px;
  transition: color var(--transition), border-color var(--transition), background var(--transition);
}

.nav a:hover {
  color: var(--accent);
  border-color: rgba(255,255,255,0.35);
  background: rgba(255,255,255,0.05);
  font-size: 13px; /* override legacy rule */
}

/* ── Main container ── */
.container-document {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 24px;
  margin: 48px auto 80px;
  padding: 0 20px;
  max-width: 760px;
  width: 100%;
}

/* ── Card wrapper ── */
.card-document,
.input-document,
.show-document {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
}

/* ── Forms ── */
form {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

form p {
  font-family: 'DM Serif Display', serif;
  font-size: 20px;
  color: var(--text);
  margin: 0;
}

form input[type="file"] {
  background: var(--surface-2);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  color: var(--text-muted);
  font-family: 'DM Sans', sans-serif;
  font-size: 14px;
  cursor: pointer;
  transition: border-color var(--transition);
  width: 100%;
}

form input[type="file"]:hover {
  border-color: rgba(255,255,255,0.3);
}

form input[type="text"] {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 16px;
  color: var(--text);
  font-family: 'DM Sans', sans-serif;
  font-size: 15px;
  outline: none;
  transition: border-color var(--transition);
  width: 100%;
}

form input[type="text"]:focus {
  border-color: rgba(255,255,255,0.5);
}

form input[type="submit"],
button[type="button"],
#botaoVisualizar {
  align-self: flex-start;
  background: var(--accent);
  color: #000;
  border: none;
  border-radius: 999px;
  padding: 11px 26px;
  font-family: 'DM Sans', sans-serif;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: opacity var(--transition), transform var(--transition);
}

form input[type="submit"]:hover,
button[type="button"]:hover,
#botaoVisualizar:hover {
  opacity: 0.85;
  transform: translateY(-1px);
}

form input[type="submit"]:active,
button[type="button"]:active {
  transform: translateY(0);
}

/* ── Status message ── */
#documentReceive {
  font-size: 14px;
  color: var(--text-muted);
  text-align: center;
  min-height: 20px;
}

/* ── Loading spinner ── */
#loading {
  display: flex;
  justify-content: center;
  padding: 16px 0;
}

.spinner {
  width: 36px;
  height: 36px;
  border: 3px solid rgba(255,255,255,0.12);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.75s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ── Informações expandíveis ── */
.conteiner-informacoes {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 20px;
}

.informacoes {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 22px;
  animation: fadeSlideIn 0.35s ease both;
}

@keyframes fadeSlideIn {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}

.informacoes h1 {
  font-family: 'DM Serif Display', serif;
  font-size: 18px;
  font-weight: 400;
  color: var(--text);
  margin: 0 0 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
  letter-spacing: 0.01em;
}

.informacoes button[type="button"] {
  margin-bottom: 14px;
  font-size: 13px;
  padding: 9px 20px;
}

/* ── Resposta do AI ── */
.resposta {
  background: #111;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px 18px;
  color: var(--text);
  font-size: 14.5px;
  line-height: 1.75;
  white-space: pre-wrap;
  overflow-y: auto;
  max-height: 420px;
  animation: fadeSlideIn 0.3s ease both;
}

/* ── Utility ── */
.hidden {
  display: none !important;
}

/* ── Responsive ── */
@media (min-width: 600px) {
  .nav {
    gap: 12px;
  }

  .nav a {
    font-size: 14px;
  }

  form p {
    font-size: 24px;
  }

  .card-document,
  .input-document,
  .show-document {
    padding: 36px 32px;
  }

  .informacoes h1 {
    font-size: 20px;
  }
}