:root {
  --ink: #12151c;
  --muted: rgba(18, 21, 28, 0.68);
  --paper: #f4f6fb;
  --panel: rgba(255, 255, 255, 0.82);
  --line: rgba(18, 21, 28, 0.12);
  --brand: #1d4ed8;
  --brand-hot: #2563eb;
  --brand-deep: #1e3a8a;
  --glow-a: rgba(37, 99, 235, 0.28);
  --glow-b: rgba(14, 165, 233, 0.22);
  --danger: #b91c1c;
  --danger-bg: #fde8e8;
  --font-display: "Outfit", system-ui, sans-serif;
  --font-body: "Nunito", system-ui, sans-serif;
}

body.theme-star {
  --brand: #0f766e;
  --brand-hot: #0d9488;
  --brand-deep: #115e59;
  --glow-a: rgba(13, 148, 136, 0.30);
  --glow-b: rgba(245, 158, 11, 0.18);
}

body.theme-edge {
  --brand: #0e7490;
  --brand-hot: #0891b2;
  --brand-deep: #155e75;
  --glow-a: rgba(8, 145, 178, 0.28);
  --glow-b: rgba(45, 212, 191, 0.18);
}

body.theme-mrs {
  --brand: #be185d;
  --brand-hot: #db2777;
  --brand-deep: #9d174d;
  --glow-a: rgba(244, 114, 182, 0.28);
  --glow-b: rgba(134, 239, 172, 0.20);
}

body.theme-nova {
  --brand: #0284c7;
  --brand-hot: #0ea5e9;
  --brand-deep: #0369a1;
  --glow-a: rgba(56, 189, 248, 0.30);
  --glow-b: rgba(251, 146, 60, 0.18);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-body);
  color: var(--ink);
  display: grid;
  place-items: center;
  padding: 1.5rem;
  background:
    radial-gradient(ellipse 70% 55% at 12% -10%, var(--glow-a), transparent 55%),
    radial-gradient(ellipse 55% 45% at 100% 0%, var(--glow-b), transparent 50%),
    linear-gradient(165deg, #e8eef8 0%, #d9e2f1 48%, #c9d5e8 100%);
}

body.theme-star {
  background:
    radial-gradient(ellipse 70% 55% at 12% -10%, var(--glow-a), transparent 55%),
    radial-gradient(ellipse 55% 45% at 100% 0%, var(--glow-b), transparent 50%),
    linear-gradient(165deg, #e6f3f1 0%, #d5e8e4 48%, #c5ddd8 100%);
}

body.theme-edge {
  background:
    radial-gradient(ellipse 70% 55% at 12% -10%, var(--glow-a), transparent 55%),
    radial-gradient(ellipse 55% 45% at 100% 0%, var(--glow-b), transparent 50%),
    linear-gradient(165deg, #e6f4f7 0%, #d5e8ef 48%, #c4dde6 100%);
}

body.theme-mrs {
  background:
    radial-gradient(ellipse 70% 55% at 12% -10%, var(--glow-a), transparent 55%),
    radial-gradient(ellipse 55% 45% at 100% 0%, var(--glow-b), transparent 50%),
    linear-gradient(165deg, #f8eef3 0%, #efe4ea 48%, #e5d8df 100%);
}

body.theme-nova {
  background:
    radial-gradient(ellipse 70% 55% at 12% -10%, var(--glow-a), transparent 55%),
    radial-gradient(ellipse 55% 45% at 100% 0%, var(--glow-b), transparent 50%),
    linear-gradient(165deg, #e8f4fb 0%, #dcecf6 48%, #cfe3f0 100%);
}

.sky {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, #000 20%, transparent 75%);
  animation: drift 28s linear infinite;
}

@keyframes drift {
  from { background-position: 0 0, 0 0; }
  to { background-position: 48px 24px, -24px 48px; }
}

.card {
  position: relative;
  width: min(420px, 100%);
  padding: 2rem 1.75rem 1.5rem;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 18px;
  backdrop-filter: blur(14px);
  box-shadow: 0 24px 50px rgba(15, 23, 42, 0.14);
  animation: rise 0.55s ease both;
}

@keyframes rise {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: translateY(0); }
}

.eyebrow {
  margin: 0;
  font-size: 0.78rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--brand-deep);
}

h1 {
  margin: 0.35rem 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.85rem, 5vw, 2.35rem);
  letter-spacing: -0.03em;
  line-height: 1.05;
}

.lede {
  margin: 0.55rem 0 0;
  color: var(--muted);
  line-height: 1.45;
}

.error {
  margin: 1rem 0 0;
  padding: 0.75rem 0.9rem;
  border-radius: 10px;
  background: var(--danger-bg);
  border-left: 4px solid var(--danger);
  color: var(--danger);
  font-weight: 700;
}

form {
  display: grid;
  gap: 0.95rem;
  margin-top: 1.35rem;
}

label {
  display: grid;
  gap: 0.4rem;
  font-weight: 700;
  font-size: 0.92rem;
}

input {
  width: 100%;
  min-height: 3rem;
  padding: 0.7rem 0.9rem;
  font: inherit;
  font-size: 1.05rem;
  border: 2px solid var(--line);
  border-radius: 10px;
  background: #fff;
  color: var(--ink);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

input:focus {
  outline: none;
  border-color: var(--brand);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--brand) 25%, transparent);
}

button {
  margin-top: 0.25rem;
  min-height: 3.1rem;
  border: 0;
  border-radius: 10px;
  background: var(--brand);
  color: #f8fafc;
  font: inherit;
  font-weight: 800;
  font-size: 1.05rem;
  cursor: pointer;
  transition: transform 0.12s ease, background 0.15s ease;
}

button:hover { background: var(--brand-hot); transform: translateY(-1px); }
button:active { transform: translateY(0); }

.hint {
  margin: 1.25rem 0 0;
  font-size: 0.85rem;
  color: var(--muted);
  line-height: 1.4;
}

@media (prefers-reduced-motion: reduce) {
  .sky, .card, button { animation: none; transition: none; }
  button:hover { transform: none; }
}