* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
}

/* ---------- Tema: variáveis (default = LIGHT, estilo PayPal-like) ---------- */
:root {
  --bg-gradient: linear-gradient(
    180deg,
    #f7fbff 0%,
    #f1f5fb 40%,
    #e4edf7 100%
  );

  --card-bg: #ffffff;
  --card-border: #d6e2f2;
  --card-shadow: 0 18px 40px rgba(15, 35, 95, 0.18);

  --text-primary: #001c43;
  --text-secondary: #4b5b76;
  --text-muted: #7c8aa4;

  --input-bg: #ffffff;
  --input-border: #c6d4ea;
  --input-focus-border: #0070ba;
  --input-placeholder: #9aa6be;

  --progress-bg: #e0e7f3;
  --progress-fill: linear-gradient(90deg, #00a8ea, #0070ba);

  --button-bg-start: #0070ba;
  --button-bg-end: #1546a0;
  --button-shadow: 0 12px 30px rgba(0, 64, 128, 0.4);

  --alert-error-bg: #ffeef0;
  --alert-error-border: #ff99a5;
  --alert-error-text: #b3263a;

  --alert-success-bg: #e5f8f0;
  --alert-success-border: #7cd8a5;
  --alert-success-text: #11683a;

  --list-item-bg: #f7f9fc;
  --list-item-bg-hover: #edf3ff;
  --list-item-border: #dde5f2;

  --nav-active-bg: #e0f2ff;
  --nav-active-text: #00518c;

  --link-color: #0070ba;
  --footer-text: #7a869c;
}

/* ---------- Tema DARK: override das variáveis ---------- */
body.theme-dark {
  --bg-gradient: radial-gradient(
    circle at top,
    #0ab9b5 0,
    #081422 45%,
    #02050b 100%
  );

  --card-bg: rgba(4, 10, 20, 0.96);
  --card-border: rgba(255, 255, 255, 0.06);
  --card-shadow: 0 24px 60px rgba(0, 0, 0, 0.6);

  --text-primary: #f5f7fa;
  --text-secondary: #c5cfde;
  --text-muted: #a9b3c9;

  --input-bg: rgba(1, 5, 12, 0.9);
  --input-border: rgba(255, 255, 255, 0.08);
  --input-focus-border: #00a8ea;
  --input-placeholder: #707a8f;

  --progress-bg: rgba(255, 255, 255, 0.06);
  --progress-fill: linear-gradient(90deg, #00a8ea, #0070ba);

  --button-bg-start: #0070ba;
  --button-bg-end: #1546a0;
  --button-shadow: 0 12px 30px rgba(0, 64, 128, 0.6);

  --alert-error-bg: rgba(255, 77, 109, 0.12);
  --alert-error-border: rgba(255, 99, 132, 0.4);
  --alert-error-text: #ff8b9f;

  --alert-success-bg: rgba(43, 207, 135, 0.12);
  --alert-success-border: rgba(43, 207, 135, 0.5);
  --alert-success-text: #7af2c5;

  --list-item-bg: rgba(255, 255, 255, 0.06);
  --list-item-bg-hover: rgba(255, 255, 255, 0.12);
  --list-item-border: rgba(255, 255, 255, 0.08);

  --nav-active-bg: rgba(0, 112, 186, 0.28);
  --nav-active-text: #ffffff;

  --link-color: #7de2ff;
  --footer-text: #7d8798;
}

/* ---------- Layout base (header / conteúdo / rodapé) ---------- */
.body-gradient {
  min-height: 100vh;
  background: var(--bg-gradient);
  color: var(--text-primary);
}

.container {
  width: 100%;
  max-width: 960px;
  padding: 16px;
  margin: 24px auto 32px;
}

.card {
  background: var(--card-bg);
  border-radius: 24px;
  padding: 24px 24px 28px;
  box-shadow: var(--card-shadow);
  border: 1px solid var(--card-border);
  backdrop-filter: blur(16px);
}

/* ---------- Títulos e textos ---------- */
.titulo {
  font-size: 1.9rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.subtitulo {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.subtitulo strong {
  color: var(--text-primary);
}

/* ---------- Formulário ---------- */
.form-upload {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.campo {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.label {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.file-input-label {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 16px;
  border-radius: 999px;
  background: linear-gradient(
    135deg,
    var(--button-bg-start),
    var(--button-bg-end)
  );
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.1s ease, box-shadow 0.1s ease,
    filter 0.1s ease;
  box-shadow: var(--button-shadow);
  color: #ffffff;
}

.file-input-label:hover {
  transform: translateY(-1px);
  filter: brightness(1.05);
}

.file-input-label:active {
  transform: translateY(0);
  box-shadow: 0 6px 18px rgba(0, 64, 128, 0.35);
}

.file-input {
  display: none;
}

.file-name {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* inputs / textarea */
.textarea {
  min-height: 40px;
  resize: vertical;
  border-radius: 16px;
  border: 1px solid var(--input-border);
  background: var(--input-bg);
  color: var(--text-primary);
  padding: 10px 12px;
  font-size: 0.9rem;
  outline: none;
  transition: border-color 0.1s ease, box-shadow 0.1s ease,
    background 0.1s ease;
}

.textarea::placeholder {
  color: var(--input-placeholder);
}

.textarea:focus {
  border-color: var(--input-focus-border);
  box-shadow: 0 0 0 1px rgba(0, 168, 234, 0.6);
}

/* ---------- Barra de progresso ---------- */
.progress-bar {
  width: 100%;
  height: 10px;
  border-radius: 999px;
  background: var(--progress-bg);
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  border-radius: 999px;
  background: var(--progress-fill);
  transition: width 0.15s ease-out;
}

.progress-text {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* ---------- Botões principais ---------- */
.botao-enviar,
.botao-novo {
  margin-top: 8px;
  width: 100%;
  padding: 12px 18px;
  border-radius: 999px;
  border: none;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  background: linear-gradient(
    135deg,
    var(--button-bg-start),
    var(--button-bg-end)
  );
  color: #ffffff;
  box-shadow: var(--button-shadow);
  transition: transform 0.1s ease, box-shadow 0.1s ease,
    filter 0.1s ease;
}

.botao-enviar:hover,
.botao-novo:hover {
  transform: translateY(-1px);
  filter: brightness(1.03);
}

.botao-enviar:disabled {
  opacity: 0.7;
  cursor: not-allowed;
  box-shadow: none;
  transform: none;
}

/* ---------- Alerts ---------- */
.alert {
  border-radius: 12px;
  padding: 10px 12px;
  font-size: 0.85rem;
}

.alert-erro {
  background: var(--alert-error-bg);
  border: 1px solid var(--alert-error-border);
  color: var(--alert-error-text);
}

.alert-sucesso {
  background: var(--alert-success-bg);
  border: 1px solid var(--alert-success-border);
  color: var(--alert-success-text);
}

/* ---------- Resultado / metadata ---------- */
.resultado {
  margin-top: 8px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.metadata h2 {
  font-size: 1.1rem;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.metadata ul {
  list-style: none;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.metadata li + li {
  margin-top: 4px;
}

/* ---------- Rodapé ---------- */
.rodape {
  margin-top: 24px;
  font-size: 0.8rem;
  color: var(--footer-text);
  text-align: center;
}

/* ---------- Lista estilo "explorer" ---------- */
.lista {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 10px;
}

.item-arquivo {
  background: var(--list-item-bg);
  border-radius: 14px;
  padding: 14px;
  border: 1px solid var(--list-item-border);
}

.clickable {
  cursor: pointer;
  transition: background 0.15s ease, transform 0.1s ease;
}

.clickable:hover {
  background: var(--list-item-bg-hover);
  transform: translateY(-1px);
}

.item-arquivo a {
  color: var(--link-color);
  text-decoration: none;
}

.item-arquivo a:hover {
  text-decoration: underline;
}

/* ---------- Navbar estilo PayPal ---------- */
.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin: -8px -4px 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--card-border);
}

.navbar-left {
  display: flex;
  align-items: center;
  gap: 8px;
}

.navbar-logo {
  width: 26px;
  height: 26px;
  border-radius: 8px;
  background: linear-gradient(145deg, #0070ba, #1546a0);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.9rem;
  color: #ffffff;
}

.navbar-logo span {
  transform: translateY(0.5px);
}

.navbar-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
}

.navbar-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

.nav-link {
  font-size: 0.9rem;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 6px 12px;
  border-radius: 999px;
  border: none;
  background: transparent;
  transition: background 0.1s ease, color 0.1s ease;
}

.nav-link:hover {
  background: rgba(0, 0, 0, 0.03);
}

.nav-link.active {
  background: var(--nav-active-bg);
  color: var(--nav-active-text);
}

.botao-link {
  background: transparent;
  border: none;
  color: var(--link-color);
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 600;
  padding: 4px 0;
}

.botao-link:hover {
  text-decoration: underline;
}

/* Botão de dark mode */
.theme-toggle {
  font-size: 0.85rem;
  border-radius: 999px;
  border: 1px solid var(--card-border);
  padding: 5px 10px;
  background: #ffffff20;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.theme-toggle span {
  font-size: 0.85rem;
}

/* ---------- Header row (título + ações) ---------- */
.header-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 8px;
}

/* ---------- Responsivo ---------- */
@media (max-width: 768px) {
  .card {
    border-radius: 20px;
    padding: 20px 18px 24px;
  }

  .navbar {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

  .navbar-right {
    width: 100%;
    justify-content: flex-start;
    flex-wrap: wrap;
  }
}

@media (max-width: 480px) {
  .titulo {
    font-size: 1.6rem;
  }
}