:root {
  color-scheme: dark;
  --ink: #e7efe9;
  --muted: #9fb0a6;
  --bg: #101614;
  --panel: #17211d;
  --line: #2c4038;
  --accent: #1f8a72;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.45 "Segoe UI", sans-serif;
}

main {
  width: min(420px, calc(100% - 32px));
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 28px 24px;
}

h1 { margin: 0 0 8px; font-size: 28px; }

.lead, .or, #message { color: var(--muted); }

.lead { margin: 0 0 18px; }

.providers { display: grid; gap: 8px; }

.providers a, button {
  display: block;
  width: 100%;
  text-align: center;
  text-decoration: none;
  border: 0;
  border-radius: 10px;
  padding: 11px 12px;
  background: #24332d;
  color: var(--ink);
  cursor: pointer;
  font: inherit;
}

.providers a.off { opacity: 0.45; }

.or { text-align: center; margin: 14px 0; }

form { display: grid; gap: 8px; }

label { color: var(--muted); font-size: 14px; }

input {
  width: 100%;
  padding: 11px 12px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: #0d1412;
  color: var(--ink);
  font: inherit;
}

#submit { background: var(--accent); color: white; margin-top: 6px; }

#switch { background: transparent; color: var(--muted); }

#message { min-height: 3em; margin: 12px 0 0; }