* { box-sizing: border-box; }

:root {
  --page-bg: #0b1220;
  --page-glow-1: rgba(94, 129, 204, 0.2);
  --page-glow-2: rgba(39, 140, 116, 0.18);
  --text: #e2e8f0;
  --muted: rgba(226, 232, 240, 0.72);

  --surface-bg: rgba(15, 23, 42, 0.92);
  --surface-border: rgba(125, 235, 203, 0.55);
  --surface-border-2: rgba(110, 176, 245, 0.45);
  --surface-border-3: rgba(255, 255, 255, 0.12);
  --surface-shadow: rgba(2, 6, 23, 0.45);
  --surface-shadow-2: rgba(2, 6, 23, 0.4);

  --input-bg: rgba(148, 163, 184, 0.16);
  --input-border: rgba(148, 163, 184, 0.4);
  --input-text: #f8fafc;
  --input-placeholder: rgba(226, 232, 240, 0.7);
  --input-focus: rgba(94, 129, 204, 0.45);

  --accent-start: #7debcb;
  --accent-end: #6eb0f5;
  --accent-text: #0b1220;

  --page-bg-color: var(--page-bg);
  --page-bg-size: auto;
  --page-bg-position: 0% 0%;
  --page-bg-repeat: repeat;
}

body {
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  margin: 0;
  padding: 20px;
  background-color: var(--page-bg-color, var(--page-bg));
  background-image: var(--page-bg-image,
    radial-gradient(90% 70% at 12% 8%, var(--page-glow-1), transparent),
    radial-gradient(100% 80% at 88% 90%, var(--page-glow-2), transparent)
  );
  background-size: var(--page-bg-size, auto);
  background-position: var(--page-bg-position, 0% 0%);
  background-repeat: var(--page-bg-repeat, repeat);
  transition: background-color 0.35s ease, background-image 0.35s ease;
  color: var(--text);
  color-scheme: dark;
}

.card {
  position: relative;
  width: 360px;
  max-width: 360px;
  padding: 28px;
  border-radius: 18px;
  border: 1px solid transparent;
  background:
    linear-gradient(var(--surface-bg), var(--surface-bg)) padding-box,
    linear-gradient(135deg, var(--surface-border), var(--surface-border-2), var(--surface-border-3)) border-box;
  box-shadow: var(--card-shadow,
    0 18px 40px var(--surface-shadow),
    0 4px 12px var(--surface-shadow-2)
  );
  text-align: center;
}

.card::after { content: none; }

h1,
h2 {
  margin: 0 0 16px;
  font-size: 22px;
  font-weight: 700;
  color: var(--text);
  text-align: center;
}

p {
  margin: 0 0 12px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.45;
}

form {
  margin: 0;
  width: 100%;
}

label {
  display: block;
  font-size: 13px;
  margin: 12px 0 6px;
  color: rgba(226, 232, 240, 0.85);
  text-align: left;
}

input {
  width: 100%;
  padding: 12px;
  border-radius: 12px;
  border: 1px solid var(--input-border);
  background: var(--input-bg);
  color: var(--input-text);
  font-size: 14px;
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
  margin: 8px 0 12px;
}

input::placeholder {
  color: var(--input-placeholder);
}

input:focus {
  border-color: rgba(110, 168, 255, 0.8);
  box-shadow: 0 0 0 3px var(--input-focus);
  background: rgba(148, 163, 184, 0.22);
}

button {
  width: 100%;
  padding: 12px 14px;
  border-radius: 12px;
  border: none;
  background: linear-gradient(120deg, var(--accent-start) 0%, var(--accent-end) 100%);
  color: var(--accent-text);
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 12px 24px rgba(2, 6, 23, 0.35);
  transition: transform 0.15s ease, box-shadow 0.2s ease, filter 0.2s ease;
}

button:hover {
  transform: translateY(-1px);
  box-shadow: 0 14px 28px rgba(2, 6, 23, 0.4);
}

button:active {
  transform: translateY(0);
  filter: brightness(0.96);
}

button[disabled] {
  opacity: 0.7;
  cursor: not-allowed;
  box-shadow: none;
  filter: grayscale(0.2);
}

.muted,
.status,
.footnote {
  color: var(--muted);
  font-size: 12px;
  margin-top: 10px;
  min-height: 18px;
  text-align: center;
}

.status { font-size: 13px; }
.status.error { color: #fca5a5; }
.status.success { color: #a7f3d0; }
.footnote { margin-top: 8px; }

a {
  color: #bde1ff;
  text-decoration: none;
}

a:hover { text-decoration: underline; }

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
}