:root {
  color-scheme: dark;
  --vp-bg: #050712;
  --vp-card-bg: #0b0f1a;
  --vp-border-subtle: #1f2937;
  --vp-text-main: #f9fafb;
  --vp-text-muted: #9ca3af;
  --vp-accent: #6366f1;
  --vp-accent-hover: #4f46e5;
  --vp-danger: #ef4444;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  min-height: 100vh;
  display: flex;
  justify-content: center;      /* horizontal center */
  align-items: flex-start;      /* top vertically */
  background: radial-gradient(circle at top, #111827 0, #020617 45%, #000 100%);
  color: var(--vp-text-main);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  padding: 2.5rem 1.5rem 1.5rem; /* extra top padding */
}

.vp-page {
  width: 100%;
  max-width: 420px;
  background: var(--vp-card-bg);
  border-radius: 1rem;
  padding: 1.5rem 1.75rem 1.75rem;
  box-shadow:
    0 18px 40px rgba(0, 0, 0, 0.7),
    0 0 0 1px rgba(15, 23, 42, 0.9);
  border: 1px solid rgba(148, 163, 184, 0.15);
}

.vp-header {
  text-align: center;
  margin-bottom: 1.25rem;
}

.vp-title {
  margin: 0;
  font-size: 1.4rem;
  letter-spacing: 0.03em;
}

.vp-main {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.vp-field {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  font-size: 0.9rem;
}

.vp-label {
  color: var(--vp-text-muted);
}

.vp-input {
  width: 100%;
  padding: 0.55rem 0.7rem;
  border-radius: 0.6rem;
  border: 1px solid var(--vp-border-subtle);
  background-color: #020617;
  color: var(--vp-text-main);
  font-size: 0.95rem;
}

.vp-input:focus {
  outline: 2px solid var(--vp-accent);
  outline-offset: 1px;
  border-color: var(--vp-accent);
}

.vp-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: 0.6rem 0.9rem;
  margin-top: 0.25rem;
  border-radius: 999px;
  border: none;
  background: linear-gradient(135deg, var(--vp-accent), #8b5cf6);
  color: #f9fafb;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: transform 0.07s ease, box-shadow 0.07s ease, background 0.15s ease;
  box-shadow: 0 12px 30px rgba(79, 70, 229, 0.45);
}

.vp-button:hover:not(:disabled) {
  background: linear-gradient(135deg, var(--vp-accent-hover), #7c3aed);
  transform: translateY(-1px);
  box-shadow: 0 16px 38px rgba(79, 70, 229, 0.65);
}

.vp-button:active:not(:disabled) {
  transform: translateY(0);
  box-shadow: 0 10px 26px rgba(79, 70, 229, 0.4);
}

.vp-button:disabled {
  opacity: 0.6;
  cursor: default;
  box-shadow: none;
}

.vp-button-secondary {
  background: transparent;
  border: 1px solid var(--vp-border-subtle);
  color: var(--vp-text-main);
  margin-top: 0.35rem;
  box-shadow: none;
}

.vp-button-secondary:hover:not(:disabled) {
  border-color: var(--vp-accent);
  background: rgba(79, 70, 229, 0.12);
}

.vp-status {
  min-height: 1.4em;
  font-size: 0.9rem;
  color: var(--vp-text-muted);
  margin-top: 0.4rem;
  word-break: break-word;
}

.vp-link {
  display: block;
  margin-top: 0.25rem;
  font-size: 0.9rem;
  word-break: break-all;
  color: var(--vp-accent);
  text-decoration: none;
}

.vp-link::before {
  content: "";
  display: block;
  height: 1px;
  margin-bottom: 0.4rem;
  background: linear-gradient(90deg, transparent, rgba(148, 163, 184, 0.6), transparent);
}

.vp-link:hover {
  text-decoration: underline;
}

.vp-progress {
  width: 100%;
  height: 0.5rem;
  margin-top: 0.6rem;
  border-radius: 999px;
  overflow: hidden;
  background-color: #020617;
  border: 1px solid rgba(31, 41, 55, 0.9);
}

/* determinate */
.vp-progress::-webkit-progress-bar {
  background-color: #020617;
}

.vp-progress::-webkit-progress-value {
  background: linear-gradient(90deg, var(--vp-accent), #22c55e);
}

.vp-progress::-moz-progress-bar {
  background: linear-gradient(90deg, var(--vp-accent), #22c55e);
}

@media (max-width: 480px) {
  body {
    align-items: flex-start;
    padding: 1.75rem 1.25rem 1.25rem;
  }

  .vp-page {
    max-width: 100%;
    padding-inline: 1.25rem;
  }
}