:root {
  color-scheme: light;
  --bg: #f6f7fb;
  --surface: #ffffff;
  --surface-soft: #f8fbff;
  --text: #1f2937;
  --muted: #5b6472;
  --heading: #0f172a;
  --border: #d9e0ea;
  --accent: #1d4ed8;
  --danger: #b91c1c;
  --danger-bg: #fef2f2;
  --success: #047857;
  --success-bg: #ecfdf5;
  --info: #1e3a8a;
  --info-bg: #eff6ff;
  --shadow: 0 10px 30px rgba(15, 23, 42, 0.06);
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  min-height: 100%;
  font-family: Arial, Helvetica, sans-serif;
  color: var(--text);
  line-height: 1.6;
  background: var(--bg);
}

.card {
  width: min(100%, 980px);
  min-height: 100vh;
  margin: 0 auto;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 28px;
  box-shadow: var(--shadow);
}

main {
  padding: 32px 20px 56px;
}

h1 {
  color: var(--heading);
  line-height: 1.25;
  margin: 0 0 18px;
  font-size: 2.1rem;
}

.lead {
  margin: 0 0 12px;
  color: var(--muted);
}

.small {
  color: var(--muted);
  font-size: 0.95rem;
  margin: 0 0 18px;
}

.eyebrow {
  display: inline-block;
  margin: 0 0 12px;
  padding: 6px 12px;
  border-radius: 999px;
  background: #eff6ff;
  color: var(--info);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.status-box {
  margin: 0 0 18px;
  padding: 14px 16px;
  border-radius: 16px;
  border: 1px solid transparent;
  font-size: 0.98rem;
  line-height: 1.5;
}

.status-box.success {
  background: var(--success-bg);
  border-color: rgba(4, 120, 87, 0.25);
  color: var(--success);
}

.status-box.error {
  background: var(--danger-bg);
  border-color: rgba(185, 28, 28, 0.25);
  color: var(--danger);
}

.status-box.info {
  background: var(--info-bg);
  border-color: rgba(37, 99, 235, 0.18);
  color: var(--accent);
}

.panel {
  background: var(--surface);
  border-radius: 18px;
  border: 1px solid var(--border);
  padding: 20px;
}

.panel + .panel {
  margin-top: 16px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 16px;
}

.field label {
  font-size: 0.92rem;
  font-weight: 700;
  color: #1f2937;
}

.field input {
  width: 100%;
  min-height: 52px;
  border-radius: 14px;
  border: 1px solid #d7dee8;
  background: #fff;
  padding: 14px 16px;
  font-size: 1rem;
  color: var(--text);
  outline: none;
  transition: border-color 160ms ease, box-shadow 160ms ease;
}

.field input:focus {
  border-color: rgba(29, 78, 216, 0.8);
  box-shadow: 0 0 0 4px rgba(29, 78, 216, 0.12);
}

.field input::placeholder {
  color: #94a3b8;
}

.primary-button,
.secondary-button,
.danger-button {
  width: 100%;
  min-height: 52px;
  border: none;
  border-radius: 14px;
  font-size: 1rem;
  font-weight: 800;
  cursor: pointer;
  transition: transform 140ms ease, background-color 140ms ease, opacity 140ms ease, box-shadow 140ms ease;
}

.primary-button:focus-visible,
.secondary-button:focus-visible,
.danger-button:focus-visible {
  outline: 3px solid rgba(37, 99, 235, 0.35);
  outline-offset: 2px;
}

.primary-button {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 12px 24px rgba(29, 78, 216, 0.18);
}

.primary-button:hover {
  background: #1e40af;
  transform: translateY(-1px);
}

.secondary-button {
  background: var(--secondary);
  color: #0f172a;
}

.secondary-button:hover {
  background: var(--secondary-hover);
  transform: translateY(-1px);
}

.danger-button {
  background: #991b1b;
  color: #fff;
  box-shadow: 0 12px 24px rgba(153, 27, 27, 0.22);
}

.danger-button:hover {
  background: #7f1d1d;
  transform: translateY(-1px);
}

.button-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 8px;
}

.confirmation-panel h2,
.result-panel h2 {
  font-size: 1.45rem;
  color: var(--heading);
  margin: 0 0 8px;
}

.confirmation-panel p,
.result-panel p {
  color: var(--muted);
  line-height: 1.6;
  margin-bottom: 16px;
}

.result-panel {
  border-left: 4px solid var(--success);
  background: #f8fbff;
}

.result-panel h2 {
  color: var(--success);
}

.is-hidden {
  display: none !important;
}

.is-disabled {
  opacity: 0.7;
  cursor: progress;
  pointer-events: none;
}

@media (max-width: 640px) {
  main {
    padding: 14px;
  }

  .card {
    border-radius: 14px;
    padding: 20px;
  }

  .panel {
    padding: 16px;
  }

  .button-row {
    grid-template-columns: 1fr;
  }
}