body { min-height: 100svh; position: relative; overflow-x: hidden; }

/* Composição da capa do KV: bloco no canto superior esquerdo, escada de blocos no canto inferior direito */
.blk { position: fixed; background: var(--indigo); z-index: 0; }
.blk-tl { top: 0; left: 0; width: clamp(56px, 14vw, 140px); height: clamp(54px, 13.6vw, 136px); }
.blk-br1 { right: 0; bottom: clamp(56px, 14vw, 140px); width: clamp(56px, 14vw, 140px); height: clamp(56px, 14vw, 140px); }
.blk-br2 { right: clamp(56px, 14vw, 140px); bottom: 0; width: clamp(56px, 14vw, 140px); height: clamp(56px, 14vw, 140px); }

.cover {
  position: relative; z-index: 1; min-height: 100svh;
  display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(300px, 420px); gap: var(--s8);
  align-items: center; align-content: center;
  padding: clamp(96px, 16vw, 160px) max(16px, env(safe-area-inset-right)) clamp(96px, 16vw, 160px) max(16px, env(safe-area-inset-left));
  max-width: 1200px; margin-inline: auto;
}
.intro h1 { font-weight: 700; text-transform: uppercase; font-size: clamp(2.4rem, 6.4vw, 5rem); line-height: 0.98; letter-spacing: -0.035em; color: var(--ink); }
.intro .sub { font-size: clamp(1.5rem, 3.2vw, 2.4rem); margin-top: var(--s4); color: var(--ink); line-height: 1.05; }

.panel { background: var(--wash); border-radius: var(--r-lg); padding: var(--s6); display: flex; flex-direction: column; gap: var(--s2); }
.panel h2 { font-size: var(--t-xl); font-weight: 700; letter-spacing: -0.01em; }
.hint { font-size: var(--t-sm); color: var(--ink-2); margin-bottom: var(--s3); }
.panel label { font-size: var(--t-sm); font-weight: 600; margin-top: var(--s3); }
.panel input {
  width: 100%; height: 48px; padding: 0 var(--s4); background: var(--paper); border: 1.5px solid #cfcac6; border-radius: 12px;
  font-size: var(--t-md); transition: border-color 0.18s var(--ease), box-shadow 0.18s var(--ease);
}
.panel input:hover { border-color: var(--ink-3); }
.panel input:focus-visible { outline: none; border-color: var(--indigo); box-shadow: 0 0 0 3px var(--indigo-wash), 0 0 0 4.5px var(--indigo); }
.pw { position: relative; }
.pw input { padding-right: 88px; }
.pw button {
  position: absolute; right: 6px; top: 6px; height: 36px; padding: 0 var(--s3); border: 0; background: transparent;
  color: var(--indigo-ink); font-weight: 600; font-size: var(--t-sm); border-radius: 8px; cursor: pointer;
}
.pw button:hover { background: var(--indigo-wash); }
.go {
  margin-top: var(--s5); height: 52px; border: 0; border-radius: 12px; background: var(--indigo); color: #fff;
  font-weight: 700; font-size: var(--t-md); cursor: pointer; letter-spacing: 0.01em;
  transition: background 0.18s var(--ease), transform 0.18s var(--ease);
}
.go:hover { background: var(--indigo-ink); }
.go:active { transform: translateY(1px); }
.go[disabled] { opacity: 0.6; cursor: progress; }
.err { background: var(--bad-wash); color: var(--bad); border-radius: 10px; padding: var(--s3) var(--s4); font-size: var(--t-sm); font-weight: 600; }
.err[hidden] { display: none; }
.credit { position: fixed; left: max(16px, env(safe-area-inset-left)); bottom: 14px; z-index: 1; font-size: var(--t-xs); color: var(--ink-3); }

@media (max-width: 860px) {
  .cover { grid-template-columns: minmax(0, 1fr); gap: var(--s6); padding-top: 112px; padding-bottom: 140px; }
  .intro h1 { font-size: clamp(2.2rem, 11vw, 3.2rem); }
}
@media (max-height: 640px) and (min-width: 861px) { .cover { padding-top: 80px; padding-bottom: 80px; } }