:root {
  color-scheme: dark;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #07111f;
  color: #e5eef9;
}

* { box-sizing: border-box; }

body {
  min-height: 100vh;
  margin: 0;
  background:
    radial-gradient(circle at 15% 20%, rgba(16, 185, 129, .19), transparent 34rem),
    radial-gradient(circle at 85% 80%, rgba(59, 130, 246, .19), transparent 30rem),
    #07111f;
}

.login-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 2rem;
}

.login-card {
  width: min(100%, 28rem);
  padding: 2.4rem;
  border: 1px solid rgba(148, 163, 184, .22);
  border-radius: 1rem;
  background: rgba(15, 23, 42, .9);
  box-shadow: 0 24px 80px rgba(0, 0, 0, .42);
  backdrop-filter: blur(16px);
}

.r2-brand {
  display: flex;
  align-items: center;
  gap: .7rem;
  margin-bottom: 1.55rem;
  color: #f8fafc;
}

.r2-brand-mark {
  display: inline-grid;
  place-items: center;
  min-width: 2.55rem;
  height: 2.15rem;
  padding: 0 .55rem;
  border-radius: .55rem;
  background: linear-gradient(135deg, #10b981, #0d9488);
  box-shadow: 0 8px 24px rgba(16, 185, 129, .2);
  color: #fff;
  font-size: .95rem;
  font-weight: 900;
  letter-spacing: .04em;
}

.r2-brand-name {
  font-size: 1.05rem;
  font-weight: 800;
  letter-spacing: .015em;
}

.eyebrow {
  color: #34d399;
  font-size: .72rem;
  font-weight: 800;
  letter-spacing: .14em;
  text-transform: uppercase;
}

h1 {
  margin: .55rem 0 .75rem;
  font-size: clamp(1.7rem, 5vw, 2.35rem);
  line-height: 1.08;
}

.intro, .access-note { color: #9fb0c5; line-height: 1.55; }
.intro { margin: 0 0 1.7rem; }
.access-note { margin: 1.25rem 0 0; font-size: .78rem; text-align: center; }

form { display: grid; gap: .55rem; }
label { margin-top: .55rem; color: #cbd5e1; font-size: .82rem; font-weight: 700; }

input {
  width: 100%;
  border: 1px solid #334155;
  border-radius: .55rem;
  background: #0b1424;
  color: #f8fafc;
  padding: .82rem .9rem;
  font: inherit;
  outline: none;
}

input:focus { border-color: #34d399; box-shadow: 0 0 0 3px rgba(52, 211, 153, .13); }

button {
  margin-top: .85rem;
  border: 0;
  border-radius: .55rem;
  padding: .86rem 1rem;
  background: linear-gradient(135deg, #10b981, #0d9488);
  color: white;
  font: inherit;
  font-weight: 800;
  cursor: pointer;
}

button:disabled { cursor: wait; opacity: .65; }
#login-error { min-height: 1.25rem; color: #fca5a5; font-size: .82rem; }