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

:root {
  --color-bg: #f8f9fa;
  --color-surface: #ffffff;
  --color-text: #1f2937;
  --color-text-muted: #6b7280;
  --color-border: #d1d5db;
  --color-primary: #115e42;
  --color-primary-hover: #0d4d36;
  --color-primary-disabled: #8fb5a6;
  --color-accent: #4a6cf7;
  --color-info-bg: #f0f2f5;
  --color-error: #dc2626;
  --radius-sm: 8px;
  --radius-md: 10px;
  --shadow-card: 0 4px 24px rgba(15, 23, 42, 0.08);
  --font-family: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100dvh;
  font-family: var(--font-family);
  font-size: 16px;
  line-height: 1.5;
  color: var(--color-text);
  background: var(--color-bg);
}

.page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100dvh;
  padding: 1.25rem;
}

.card {
  width: 100%;
  max-width: 400px;
  padding: 1.75rem 1.5rem;
  background: var(--color-surface);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
}

.card__header {
  margin-bottom: 1.5rem;
  text-align: center;
}

.card__title {
  margin: 0 0 0.35rem;
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-text);
}

.card__subtitle {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

.form__group {
  margin-bottom: 1.25rem;
}

.form__label {
  display: block;
  margin-bottom: 0.5rem;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-text);
}

.form__input {
  width: 100%;
  padding: 0.75rem 0.875rem;
  font: inherit;
  font-size: 1rem;
  color: var(--color-text);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.form__input::placeholder {
  color: #9ca3af;
}

.form__input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(17, 94, 66, 0.15);
}

.form__input--invalid {
  border-color: var(--color-error);
}

.form__input--invalid:focus {
  box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.12);
}

.form__hint {
  margin: 0.5rem 0 0;
  font-size: 0.8125rem;
  line-height: 1.45;
  color: var(--color-text-muted);
}

.form__error {
  margin: 0.5rem 0 0;
  font-size: 0.8125rem;
  color: var(--color-error);
}

.btn {
  display: block;
  width: 100%;
  padding: 0.875rem 1rem;
  font: inherit;
  font-size: 1rem;
  font-weight: 600;
  text-align: center;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background-color 0.15s ease, opacity 0.15s ease;
}

.btn--primary {
  color: #ffffff;
  background: var(--color-primary);
}

.btn--primary:hover:not(:disabled) {
  background: var(--color-primary-hover);
}

.btn--primary:disabled {
  cursor: not-allowed;
  background: var(--color-primary-disabled);
}

.btn--primary:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.info {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 1.5rem;
  padding: 1rem 1.125rem;
  background: var(--color-info-bg);
  border-radius: var(--radius-sm);
}

.info__item {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.info__label {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.info__value {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-text);
  word-break: break-word;
}

.info__value--amount {
  color: var(--color-accent);
}

.status {
  margin: 1rem 0 0;
  padding: 0.75rem 0.875rem;
  font-size: 0.875rem;
  border-radius: var(--radius-sm);
  text-align: center;
}

.status--success {
  color: #065f46;
  background: #d1fae5;
}

.status--error {
  color: var(--color-error);
  background: #ffebeb;
}

.status--loading {
  color: var(--color-text-muted);
  background: var(--color-info-bg);
}

.state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  min-height: 12rem;
  padding: 1rem 0.5rem;
}

.state[hidden] {
  display: none !important;
}

.state--loading .state__text {
  margin: 1rem 0 0;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

.state__spinner {
  width: 2.5rem;
  height: 2.5rem;
  border: 3px solid var(--color-info-bg);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.state--error {
  gap: 1.25rem;
}

.error-icon {
  width: 4.5rem;
  height: 4.5rem;
  color: var(--color-error);
}

.error-icon svg {
  width: 100%;
  height: 100%;
}

.error-message {
  margin: 0;
  max-width: 20rem;
  font-size: 0.9375rem;
  line-height: 1.55;
  color: var(--color-text);
  font-weight: 500;
}

.state--success {
  gap: 1.25rem;
  min-height: 14rem;
}

.success-icon {
  width: 4.5rem;
  height: 4.5rem;
  color: var(--color-primary);
}

.success-icon svg {
  width: 100%;
  height: 100%;
}

.success-message {
  margin: 0;
  max-width: 22rem;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  font-weight: 600;
  text-align: center;
}

@media (min-width: 480px) {
  .card {
    padding: 2rem 1.875rem;
  }

  .card__title {
    font-size: 1.625rem;
  }
}

@media (min-width: 768px) {
  .page {
    padding: 2rem;
  }
}