:root {
  color-scheme: dark;
  --bg: #0c1110;
  --panel: #17211e;
  --line: #2a3935;
  --text: #f3f6f2;
  --muted: #98aaa4;
  --accent: #72f1b8;
  --danger: #ff8888;
}

* { box-sizing: border-box; }

body {
  min-height: 100svh;
  margin: 0;
  display: grid;
  place-items: center;
  padding: calc(24px + env(safe-area-inset-top)) 18px calc(24px + env(safe-area-inset-bottom));
  color: var(--text);
  background:
    radial-gradient(circle at 20% 0, rgba(77, 175, 137, .2), transparent 34rem),
    var(--bg);
  font: 15px/1.5 Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.login-card {
  width: min(100%, 420px);
  padding: 32px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: linear-gradient(145deg, rgba(25, 36, 33, .98), rgba(17, 25, 23, .98));
  box-shadow: 0 28px 70px rgba(0, 0, 0, .38);
}

.mark {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  margin-bottom: 24px;
  border: 1px solid rgba(114, 241, 184, .4);
  border-radius: 13px;
  color: var(--accent);
  background: rgba(114, 241, 184, .08);
  box-shadow: inset 0 0 18px rgba(114, 241, 184, .08);
}

.eyebrow { margin: 0 0 8px; color: var(--accent); font-size: .69rem; font-weight: 750; letter-spacing: .16em; }
h1 { margin: 0; font-size: clamp(2rem, 10vw, 3rem); line-height: 1; letter-spacing: -.05em; }
.intro { margin: 15px 0 20px; color: var(--muted); }
.error { min-height: 1.5em; margin: 0 0 8px; color: var(--danger); }
.error:empty { display: none; }
form { display: grid; gap: 16px; }
label { display: grid; gap: 7px; color: var(--muted); font-size: .8rem; font-weight: 650; }
input {
  width: 100%;
  min-height: 48px;
  padding: 11px 13px;
  border: 1px solid var(--line);
  border-radius: 10px;
  outline: none;
  color: var(--text);
  background: #0d1412;
  font: inherit;
  font-size: 1rem;
}
input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(114, 241, 184, .1); }
button {
  min-height: 48px;
  margin-top: 3px;
  border: 0;
  border-radius: 10px;
  color: #07110d;
  background: var(--accent);
  font: inherit;
  font-weight: 800;
  cursor: pointer;
}
.privacy { margin: 20px 0 0; color: var(--muted); font-size: .76rem; }

@media (max-width: 480px) {
  .login-card { padding: 25px 20px; border-radius: 16px; }
}