/* Base comum: página de vendas, entrada do aluno e painel do administrador */
:root {
  --pri: #e8542f; --pri2: #ff7a45; --pri-s: #fff0ea; --ink: #1d1a19; --txt: #2b2624; --txt2: #6b625e;
  --bg: #fffaf6; --bg2: #f6eee8; --card: #ffffff; --linha: #eadfd8; --ok: #1f9d63; --ok-s: #e6f6ee; --erro: #c23a2b; --erro-s: #fdecea;
  --sombra: 0 10px 30px rgba(80, 40, 20, .08); --raio: 18px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --pri: #ff6a40; --pri2: #ff8a5c; --pri-s: #3a211a; --ink: #fff; --txt: #f1e9e5; --txt2: #b3a6a0;
    --bg: #141110; --bg2: #1f1a18; --card: #1b1716; --linha: #342b28; --ok: #3ccf8e; --ok-s: #15291f; --erro: #ff7b6b; --erro-s: #33191a;
    --sombra: 0 10px 30px rgba(0, 0, 0, .35); color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --pri: #ff6a40; --pri2: #ff8a5c; --pri-s: #3a211a; --ink: #fff; --txt: #f1e9e5; --txt2: #b3a6a0;
  --bg: #141110; --bg2: #1f1a18; --card: #1b1716; --linha: #342b28; --ok: #3ccf8e; --ok-s: #15291f; --erro: #ff7b6b; --erro-s: #33191a;
  --sombra: 0 10px 30px rgba(0, 0, 0, .35); color-scheme: dark;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body { margin: 0; background: var(--bg); color: var(--txt); font: 17px/1.55 "Nunito", system-ui, -apple-system, "Segoe UI", sans-serif; }
img, video { max-width: 100%; }
a { color: var(--pri); }
h1, h2, h3 { color: var(--ink); line-height: 1.15; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; border: 0; cursor: pointer; text-decoration: none;
  font: inherit; font-weight: 800; color: #fff; background: linear-gradient(135deg, var(--pri), var(--pri2)); padding: 14px 22px; border-radius: 14px;
  box-shadow: 0 8px 22px rgba(232, 84, 47, .3); transition: transform .15s, box-shadow .15s; }
.btn:hover { transform: translateY(-1px); box-shadow: 0 12px 28px rgba(232, 84, 47, .38); }
.btn:disabled { opacity: .6; cursor: default; transform: none; }
.btn.sec { background: var(--card); color: var(--txt); border: 1px solid var(--linha); box-shadow: none; }
.btn.peq { padding: 8px 12px; border-radius: 10px; font-size: 14px; }
.btn.zap { background: #25d366; box-shadow: 0 8px 22px rgba(37, 211, 102, .3); }
.campo { display: grid; gap: 6px; margin: 0 0 14px; }
.campo label { font-weight: 700; font-size: 15px; }
input, select, textarea { font: inherit; color: var(--txt); background: var(--card); border: 1.5px solid var(--linha); border-radius: 12px; padding: 12px 14px; width: 100%; min-width: 0; }
textarea { min-height: 110px; resize: vertical; }
input:focus, select:focus, textarea:focus { outline: 3px solid color-mix(in srgb, var(--pri) 30%, transparent); border-color: var(--pri); }
.caixa { background: var(--card); border: 1px solid var(--linha); border-radius: var(--raio); padding: 22px; box-shadow: var(--sombra); }
.aviso { border-radius: 12px; padding: 12px 14px; margin: 10px 0; font-size: 15px; }
.aviso.ok { background: var(--ok-s); color: var(--ok); }
.aviso.erro { background: var(--erro-s); color: var(--erro); }
.mini { font-size: 14px; color: var(--txt2); }
.oculto { display: none !important; }
.sr { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }