:root{
  --bg: #0b0f14;
  --panel: #131a25;
  --border: #1f2835;
  --text: #e7e7e7;
  --muted: #97a4b3;
  --primary: #1f6feb;
  --danger: #e0482f;
  --secondary: #444;
  --warn: #ffcc66;
}

* { box-sizing: border-box; }
html, body { height: 100%; }

body {
  font-family: system-ui, Segoe UI, Roboto, Arial, sans-serif;
  margin: 0;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* HEADER CENTRATO con spazio per il tasto back */
.topbar{
  position: sticky;
  top: 0;
  background: #121720;
  border-bottom: 1px solid #1f2835;
  padding: 12px 16px;
  z-index: 10;

  /* griglia: [back] [titolo] [spacer] */
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 8px;
}
.title-top{
  position: sticky;
  top: 0;
  background: #121720;
  border-bottom: 1px solid #1f2835;
  padding: 12px 16px;
  z-index: 10;
  display: grid;
  align-items: center;
  gap: 8px;
}
.title-top h1{
  margin: 0;
  font-size: 1.06rem;
  letter-spacing: .3px;
  justify-self: center;   /* sempre centrato */
  line-height: 1.2;
}

.topbar h1{
  margin: 0;
  font-size: 1.06rem;
  letter-spacing: .3px;
  justify-self: center;   /* sempre centrato */
  line-height: 1.2;
}

/* bottone back */
.topbar .back{
  justify-self: start;    /* colonna sinistra */
  text-decoration: none;
  color: #9ec3ff;
  font-size: 1.1rem;
  padding: 6px 8px;
  border-radius: 10px;
  border: 1px solid transparent;
}
.topbar .back:hover{ border-color:#1f2835; background:#0f141c; }

/* colonna destra “vuota” per simmetria */
.topbar .spacer{ display:block; }


/* Stack verticale per i pulsanti del login */
.stack {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

/* Pulsante “linklike” (aspetto neutro) */
.linklike {
  background: transparent;
  color: #9ec3ff;
  border: 1px solid #1f2835;
}
.linklike:hover { text-decoration: underline; }


.back {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 10px;
  padding: 8px 12px;
  cursor: pointer;
}

.wrap {
  width: 100%;
  max-width: 760px;
  margin: 18px auto 32px;
  padding: 0 16px;
  flex: 1;
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 16px;
  margin: 16px 0;
  box-shadow: 0 6px 24px rgba(0,0,0,.20);
}

button {
  min-height: 48px;              /* tap target mobile */
  padding: 14px 16px;
  border-radius: 12px;
  border: 0;
  background: var(--primary);
  color: #fff;
  cursor: pointer;
  width: 100%;
  margin: 6px 0;
  font-size: 1rem;
}
button:disabled { opacity: .65; cursor: default; }

button.secondary { background: var(--secondary); }

button.google { background: var(--danger); }

.linklike {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
  min-height: 44px;
}

a.link { color: #9ec3ff; text-decoration: none; }
a.link:hover { text-decoration: underline; }

input {
  width: 100%;
  min-height: 44px;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: #0f141c;
  color: var(--text);
  margin: 6px 0;
  font-size: 1rem;
}

.row {
  display: flex;
  gap: 8px;
  align-items: center;
}
.row-wrap { flex-wrap: wrap; }
.row-right { justify-content: flex-end; }

.grow { flex: 1; }

.grid { display: grid; gap: 10px; }
.grid-2 { grid-template-columns: 1fr; }
@media (min-width: 480px){
  .grid-2 { grid-template-columns: 1fr 1fr; }
}

.muted { color: var(--muted); font-size: .95rem; }
.warn  { color: var(--warn); }

.status { margin-top: 10px; min-height: 1.2rem; }
.status.ok  { color: #7fe48a; }
.status.err { color: #ff8a8a; }

.center{ text-align:center; }

footer {
  background: #121720;
  color: var(--muted);
  text-align: center;
  padding: 14px;
  font-size: 0.9rem;
  border-top: 1px solid var(--border);
}