:root {
  --bg: #fafafa; --bg-2: #f1f1f4; --card: rgba(255, 255, 255, .82); --text: #0a0a0a; --muted: #6b6b76; --line: #e4e4e9;
  --grid: rgba(10, 10, 20, .07); --field: #fff; --primary: #0a0a0a; --primary-text: #fafafa;
  --glow-1: rgba(99, 102, 241, .22); --glow-2: rgba(34, 211, 238, .18);
  --ok: #047857; --ok-bg: #ecfdf5; --err: #b91c1c; --err-bg: #fef2f2;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #07070a; --bg-2: #0d0d14; --card: rgba(16, 16, 22, .78); --text: #f4f4f5; --muted: #8b8b98; --line: #23232c;
    --grid: rgba(255, 255, 255, .06); --field: #0b0b10; --primary: #f4f4f5; --primary-text: #0a0a0a;
    --glow-1: rgba(99, 102, 241, .28); --glow-2: rgba(34, 211, 238, .16);
    --ok: #6ee7b7; --ok-bg: #022c22; --err: #fca5a5; --err-bg: #2a0a0a;
  }
}
* { box-sizing: border-box; }

body {
  margin: 0; min-height: 100vh; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 20px;
  padding: 32px 16px; color: var(--text); font: 15px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif;
  background:
    radial-gradient(60% 45% at 50% 0%, var(--glow-1), transparent 70%),
    radial-gradient(40% 35% at 85% 100%, var(--glow-2), transparent 70%),
    linear-gradient(180deg, var(--bg), var(--bg-2));
  background-attachment: fixed;
  position: relative; overflow-x: hidden;
}
/* Large-square grid on the lower part of the page, fading out towards the top. */
body::before {
  content: ""; position: fixed; inset: 35% 0 0 0; pointer-events: none; z-index: 0;
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 72px 72px; background-position: center bottom;
  mask-image: linear-gradient(to top, #000 15%, transparent 95%);
  -webkit-mask-image: linear-gradient(to top, #000 15%, transparent 95%);
}

.card {
  position: relative; z-index: 1; width: 100%; max-width: 380px; padding: 28px;
  background: var(--card); border: 1px solid var(--line); border-radius: 14px;
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  box-shadow: 0 20px 50px -24px rgba(0, 0, 0, .25);
}
.brand { display: flex; align-items: center; gap: 8px; margin-bottom: 22px; font: 500 12px/1 var(--mono); color: var(--muted); letter-spacing: .02em; }
.brand::after { content: "auth.eduardoguette.com"; margin-left: auto; opacity: .7; }
.logo { width: 14px; height: 14px; border-radius: 4px; background: linear-gradient(135deg, #6366f1, #22d3ee); box-shadow: 0 0 12px rgba(99, 102, 241, .6); }
h1 { margin: 0 0 4px; font-size: 22px; line-height: 1.2; font-weight: 650; letter-spacing: -0.02em; }
.sub { margin: 0 0 18px; color: var(--muted); font-size: 14px; }
.sub b { color: var(--text); font-weight: 600; }
p { margin: 0 0 12px; }

.stack { display: flex; flex-direction: column; gap: 14px; margin-top: 18px; }
.field { display: flex; flex-direction: column; gap: 6px; font: 500 11px/1 var(--mono); color: var(--muted); text-transform: uppercase; letter-spacing: .06em; }
.field input {
  font: 15px/1.4 system-ui, sans-serif; color: var(--text); text-transform: none; letter-spacing: 0;
  background: var(--field); border: 1px solid var(--line); border-radius: 8px; padding: 10px 12px; outline: none;
  transition: border-color .15s, box-shadow .15s;
}
.field input:focus { border-color: #6366f1; box-shadow: 0 0 0 3px rgba(99, 102, 241, .18); }

button { font: inherit; cursor: pointer; }
.primary {
  margin-top: 2px; border: 0; border-radius: 8px; padding: 11px 14px; background: var(--primary); color: var(--primary-text);
  font-weight: 600; display: flex; align-items: center; justify-content: center; gap: 8px; transition: opacity .15s, transform .05s;
}
.primary::after { content: "→"; font-family: var(--mono); opacity: .7; }
.primary:hover { opacity: .9; }
.primary:active { transform: translateY(1px); }
.link { background: none; border: 0; color: var(--muted); padding: 4px 0; font: 12px/1 var(--mono); }
.link:hover { color: var(--text); }

.links { display: flex; justify-content: space-between; gap: 12px; margin-top: 18px; padding-top: 16px; border-top: 1px dashed var(--line); font: 12px/1 var(--mono); }
.links a { color: var(--muted); text-decoration: none; }
.links a:hover { color: var(--text); }
.cancel { margin-top: 10px; text-align: center; }
.hint { font: 11px/1.5 var(--mono); color: var(--muted); margin: -6px 0 0; }
.alert { font-size: 13px; border-radius: 8px; padding: 9px 12px; margin: 14px 0 0; border: 1px solid transparent; }
.alert.error { background: var(--err-bg); color: var(--err); border-color: color-mix(in srgb, var(--err) 25%, transparent); }
.alert.ok { background: var(--ok-bg); color: var(--ok); border-color: color-mix(in srgb, var(--ok) 25%, transparent); }

footer { position: relative; z-index: 1; font: 11px/1 var(--mono); color: var(--muted); letter-spacing: .02em; }
footer::before { content: "● "; color: #22c55e; }