:root {
  --ink: #0A0A0B;
  --graphite: #0E0F11;
  --panel: #141517;
  --line: #1F2024;
  --line2: #2A2B30;
  --line3: #3A3B40;
  --mute: #85868C;
  --soft: #A6A7AC;
  --fog: #C9CACE;
  --paper: #EDEDEC;
  --ciano: #3BE1F0;
  --ciano-deep: #0B6E78;
  --nao: #F0614B;
  --syne: 'Syne', 'Arial Black', sans-serif;
  --geist: 'Geist', Arial, sans-serif;
  --mono: 'Geist Mono', Consolas, monospace;
  --gutter: clamp(16px, 4vw, 56px);
  color-scheme: dark;
}

* { box-sizing: border-box; margin: 0; }

html { -webkit-text-size-adjust: 100%; }

body {
  background: var(--ink);
  background-image: radial-gradient(120% 80% at 100% 0%, #1A1B1E 0%, var(--ink) 55%);
  background-attachment: fixed;
  color: var(--paper);
  font: 400 16px/1.55 var(--geist);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* grão sutil */
body::before {
  content: '';
  position: fixed; inset: 0;
  pointer-events: none; z-index: 100;
  opacity: .06;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

a { color: inherit; }
img { display: block; max-width: 100%; }
button, input, select { font: inherit; color: inherit; }
[hidden] { display: none !important; }

.rotulo {
  font: 500 12px/1 var(--mono);
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--soft);
  display: inline-flex; align-items: center; gap: 10px;
}
.rotulo::before {
  content: ''; width: 6px; height: 6px; border-radius: 50%;
  background: var(--ciano); box-shadow: 0 0 10px var(--ciano);
}

.titulo {
  font: 800 clamp(40px, 7vw, 96px)/.95 var(--syne);
  letter-spacing: -.045em;
}
.titulo-m { font: 700 clamp(26px, 3.4vw, 40px)/1 var(--syne); letter-spacing: -.04em; }

.mono { font-family: var(--mono); letter-spacing: .06em; }
.mute { color: var(--mute); }
.soft { color: var(--soft); }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  height: 46px; padding: 0 22px;
  border-radius: 999px; border: 1px solid var(--line3);
  background: transparent;
  font: 500 12px/1 var(--mono); letter-spacing: .12em; text-transform: uppercase;
  cursor: pointer; text-decoration: none; white-space: nowrap;
  transition: background .2s, border-color .2s, color .2s, transform .15s;
}
.btn:hover { border-color: var(--fog); }
.btn:active { transform: scale(.97); }
.btn:disabled { opacity: .45; cursor: default; transform: none; }
.btn-primario { background: var(--ciano); border-color: var(--ciano); color: var(--ink); }
.btn-primario:hover { background: #6BEAF5; border-color: #6BEAF5; }
.btn-perigo:hover { border-color: var(--nao); color: var(--nao); }
.btn-pequeno { height: 36px; padding: 0 14px; font-size: 11px; }
.btn svg { width: 16px; height: 16px; flex: none; }

.campo { display: grid; gap: 8px; }
.campo label { font: 500 11px/1 var(--mono); letter-spacing: .12em; text-transform: uppercase; color: var(--mute); }
.campo input, .campo select {
  height: 50px; padding: 0 16px;
  background: var(--graphite); border: 1px solid var(--line2); border-radius: 12px;
  outline: none; transition: border-color .2s;
}
.campo input:focus, .campo select:focus { border-color: var(--ciano); }

.aviso { font: 400 13px/1.4 var(--mono); color: var(--nao); min-height: 18px; }

.topo {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 22px var(--gutter);
  border-bottom: 1px solid var(--line);
}
.topo .logo img { height: 22px; width: auto; }

.rodape {
  display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  padding: 32px var(--gutter) 40px;
  border-top: 1px solid var(--line);
  color: var(--mute); font: 400 12px/1.4 var(--mono); letter-spacing: .08em; text-transform: uppercase;
}
.rodape img { height: 18px; width: auto; opacity: .8; }

.toast {
  position: fixed; left: 50%; bottom: 28px; transform: translate(-50%, 20px);
  background: var(--paper); color: var(--ink);
  padding: 12px 20px; border-radius: 999px;
  font: 500 12px/1.3 var(--mono); letter-spacing: .08em; text-transform: uppercase;
  opacity: 0; pointer-events: none; transition: opacity .25s, transform .25s; z-index: 200;
  max-width: calc(100vw - 32px); text-align: center;
}
.toast.on { opacity: 1; transform: translate(-50%, 0); }

/* Tela de senha / login */
.porta {
  min-height: 100vh; display: grid; grid-template-rows: auto 1fr auto;
}
.porta-centro {
  display: grid; align-content: center; gap: 28px;
  width: min(460px, 100%); margin: 0 auto; padding: 48px 16px;
}
.porta-centro form { display: grid; gap: 16px; }

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}