/* ============= Reset mínimo e base tipográfica ============= */
:root {
  /* Paleta padrão (modo escuro – fica como fallback) */
  --fg-bg: #0a0f14;
  --fg-surface: rgba(9, 15, 20, 0.65);
  --fg-text: #e7edf3;
  --fg-muted: #b8c3cc;
  --fg-line: rgba(255,255,255,0.12);

  --fg-primary: #1ec28b;
  --fg-primary-700: #18a776;
  --fg-danger: #e85959;
  --fg-info: #4494ff;

  --fg-radius: 16px;
  --fg-shadow: 0 10px 30px rgba(0,0,0,0.15);

  --fg-font: "Montserrat", system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
}

/* ====== Overrides do TEMA CLARO (associação de preservação) ====== */
.fg-light {
  --fg-bg: #f5faf7;               /* verde muito claro de fundo */
  --fg-surface: #ffffff;          /* cartões brancos */
  --fg-text: #1e2b24;             /* texto principal escuro */
  --fg-muted: #63736a;            /* texto secundário */
  --fg-line: rgba(0,0,0,0.08);    /* linhas suaves */

  --fg-primary: #1e965f;          /* verde folha */
  --fg-primary-700: #187a4e;      /* verde mais escuro */
  --fg-shadow: 0 10px 30px rgba(24, 122, 78, 0.08); /* sombra suave esverdeada */
}

* { box-sizing: border-box; }
html, body { height: 100%; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--fg-font);
  color: var(--fg-text);
  background: var(--fg-bg);
  line-height: 1.4;
}

/* ============= Background orgânico, sempre ATRÁS do conteúdo ============= */
.fg-page {
  position: relative;
  isolation: isolate; /* stacking context independente */
  overflow: hidden;
}

/* Fundo suave com "halos" verdes e textura leve */
.fg-page::before,
.fg-page::after {
  content: "";
  position: absolute;
  inset: -20%;
  z-index: -1; /* fica atrás de tudo */
  pointer-events: none;
}

/* halos orgânicos */
.fg-page::before {
  background:
    radial-gradient(60% 60% at 18% 15%, rgba(30, 150, 95, 0.18), transparent 70%),
    radial-gradient(45% 45% at 85% 80%, rgba(90, 180, 140, 0.16), transparent 70%),
    linear-gradient(180deg, rgba(255,255,255,0.7), rgba(255,255,255,0.7));
  filter: blur(6px);
}

/* leve textura “papel” + linhas discretas */
.fg-page::after {
  background-image:
    linear-gradient(180deg, rgba(255,255,255,0.8), rgba(255,255,255,0.8)),
    repeating-linear-gradient(
      0deg,
      transparent 0 22px,
      rgba(24,122,78,0.06) 22px 23px
    );
  opacity: .65;
}

/* ============= Container e card ============= */
.fg-container {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.fg-card {
  width: 100%;
  max-width: 440px;
  background: var(--fg-surface);
  border: 1px solid var(--fg-line);
  border-radius: var(--fg-radius);
  box-shadow: var(--fg-shadow);
  padding: 28px;
}

/* ============= Logo e título ============= */
.fg-logo {
  display: grid;
  place-items: center;
  margin-bottom: 14px;
}
.fg-logo img {
  height: 56px;
  width: auto;
  display: block;
}
.fg-title {
  margin: 6px 0 18px;
  font-size: 1.45rem;
  font-weight: 700;
  letter-spacing: .2px;
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--fg-text);
}

/* ============= Formulário ============= */
.fg-form { display: grid; gap: 14px; }

/* campo com ícone à esquerda */
.fg-field {
  display: grid;
  grid-template-columns: 44px 1fr;
  align-items: center;
  border: 1px solid var(--fg-line);
  border-radius: 12px;
  background: #ffffff;
}
.fg-field-icon {
  display: grid;
  place-items: center;
  font-size: 1rem;
  color: var(--fg-muted);
}
.fg-input {
  width: 100%;
  border: 0;
  outline: none;
  padding: 14px 14px 14px 0;
  font-size: 1rem;
  color: var(--fg-text);
  background: transparent;
}
.fg-input::placeholder { color: var(--fg-muted); }

/* foco visível e acessível */
.fg-field:focus-within {
  border-color: rgba(30, 150, 95, 0.35);
  box-shadow: 0 0 0 3px rgba(30, 150, 95, 0.14);
}

/* ============= Botões e links ============= */
.fg-btn {
  display: inline-flex;
  gap: 10px;
  align-items: center;
  justify-content: center;
  border: 0;
  border-radius: 12px;
  cursor: pointer;
  padding: 12px 16px;
  font-weight: 600;
  font-size: 1rem;
  transition: transform .05s ease, filter .15s ease, background .2s ease;
}
.fg-btn:active { transform: translateY(1px); }
.fg-btn-full { width: 100%; }

.fg-btn-primary {
  background: linear-gradient(180deg, var(--fg-primary), var(--fg-primary-700));
  color: #ffffff;
}
.fg-btn-primary:hover { filter: brightness(1.03); }

.fg-links { margin-top: 14px; text-align: center; }
.fg-link {
  color: var(--fg-primary-700);
  text-decoration: none;
  border-bottom: 1px dashed rgba(24,122,78,0.35);
}
.fg-link:hover { border-bottom-color: rgba(24,122,78,0.55); }

/* ============= Alerts (fallback sem JS) ============= */
.fg-alert {
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--fg-line);
  margin-bottom: 12px;
  font-size: .95rem;
  color: var(--fg-text);
}
.fg-alert i { margin-right: 8px; }
.fg-alert-danger {
  background: #fff5f5;
  border-color: rgba(232, 89, 89, 0.35);
}
.fg-alert-info {
  background: #f0f7ff;
  border-color: rgba(68, 148, 255, 0.35);
}

/* ============= Responsividade ============= */
@media (max-width: 420px) {
  .fg-card { padding: 22px; }
  .fg-title { font-size: 1.3rem; }
  .fg-field { grid-template-columns: 40px 1fr; }
  .fg-input { font-size: .98rem; }
}

/* ============= Alto contraste opcional ============= */
@media (prefers-contrast: more) {
  .fg-field { border-color: rgba(0,0,0,0.22); }
  .fg-field:focus-within { box-shadow: 0 0 0 3px rgba(30, 150, 95, 0.28); }
  .fg-btn-primary { filter: saturate(1.15); }
}