:root {
  --color-primary: #1a7fd4;
  --color-primary-hover: #1568b8;
  --color-accent: #4ec4b6;
  --color-text: #4a6773;
  --color-text-strong: #1e3a4f;
  --color-bg: #eef5f9;
  --color-card: #ffffff;
  --color-surface: #e8f4f8;
  --color-border: #d8e4ea;
  --color-focus-ring: rgba(26, 127, 212, 0.25);
  --color-toast-bg: #1e3a4f;
  --color-toast-text: #ffffff;
  --color-error: #dc3545;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100dvh;
  font-family: Vazirmatn, sans-serif;
  font-size: 16px;
  color: var(--color-text);
  background-color: var(--color-bg);
  background-image:
    radial-gradient(circle at 20% 30%, rgba(26, 127, 212, 0.08) 0%, transparent 50%),
    radial-gradient(circle at 80% 70%, rgba(78, 196, 182, 0.1) 0%, transparent 50%),
    repeating-linear-gradient(
      45deg,
      transparent,
      transparent 12px,
      rgba(26, 127, 212, 0.03) 12px,
      rgba(26, 127, 212, 0.03) 13px
    );
}

.app {
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 16px;
  padding-bottom: calc(16px + env(safe-area-inset-bottom));
  width: 100%;
  max-width: 420px;
  margin: 0 auto;
}

.brand {
  text-align: center;
  margin-bottom: 20px;
}

.brand__logo {
  display: block;
  margin: 0 auto 8px;
  object-fit: contain;
}

.brand__tagline {
  margin: 0;
  font-size: 0.85rem;
  color: var(--color-accent);
}

.card {
  width: 100%;
  background: var(--color-card);
  border-radius: 20px;
  box-shadow:
    0 10px 40px rgba(26, 127, 212, 0.12),
    0 2px 8px rgba(0, 0, 0, 0.05);
  padding: 24px;
}

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

.panel.is-active {
  animation: panel-fade-in 200ms ease-out;
}

.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
}

.header__title {
  color: var(--color-primary);
  font-size: 0.95rem;
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  margin: 0;
}

.header__logout {
  background: none;
  border: none;
  color: var(--color-text);
  font: inherit;
  cursor: pointer;
  padding: 8px;
  flex-shrink: 0;
}

.header__logout:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: 4px;
}

.field {
  margin-bottom: 24px;
}

.field label {
  display: block;
  margin-bottom: 8px;
}

.field input,
.btn-primary,
.header__logout {
  font-family: Vazirmatn, sans-serif;
}

.field input {
  width: 100%;
  min-height: 48px;
  padding: 12px;
  font: inherit;
  font-size: 16px;
  border: 1px solid var(--color-border);
  border-radius: 10px;
}

.field input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-focus-ring);
}

.btn-primary {
  width: 100%;
  min-height: 48px;
  border: none;
  border-radius: 10px;
  background: linear-gradient(135deg, #1a7fd4, #2a9fd4);
  color: #fff;
  font: inherit;
  font-size: 16px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: transform 100ms ease, background 150ms ease;
}

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

.btn-primary:active:not(:disabled) {
  transform: scale(0.98);
}

.btn-primary:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

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

.spinner {
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255, 255, 255, 0.4);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

.error {
  color: var(--color-error);
  font-size: 14px;
  margin-top: 8px;
}

.app-enter {
  animation: app-enter 300ms ease-out backwards;
}

.brand.app-enter {
  animation-delay: 0ms;
}

.card.app-enter {
  animation-delay: 50ms;
}

@keyframes app-enter {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes panel-fade-in {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.result {
  background: var(--color-surface);
  border-radius: 12px;
  overflow: hidden;
  max-height: 0;
  opacity: 0;
  margin-top: 0;
  padding: 0 16px;
  transition:
    max-height 250ms ease-out,
    opacity 250ms ease-out,
    margin-top 250ms ease-out,
    padding 250ms ease-out;
}

.result.is-revealed {
  max-height: 200px;
  opacity: 1;
  margin-top: 24px;
  padding: 16px;
}

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

.result__label {
  display: block;
  margin-bottom: 8px;
}

.result__code {
  font-family: ui-monospace, monospace;
  font-size: 1.1rem;
  color: var(--color-text-strong);
  word-break: break-all;
  user-select: all;
}

@media (prefers-reduced-motion: reduce) {
  .app-enter,
  .panel.is-active,
  .result,
  .toast {
    animation: none !important;
    transition: none !important;
  }

  .result.is-revealed {
    max-height: none;
    opacity: 1;
    margin-top: 24px;
    padding: 16px;
  }
}

.toast {
  position: fixed;
  left: 50%;
  bottom: calc(16px + env(safe-area-inset-bottom));
  transform: translateX(-50%) translateY(8px);
  background: var(--color-toast-bg);
  color: var(--color-toast-text);
  padding: 12px 20px;
  border-radius: 999px;
  font-size: 14px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 150ms, transform 150ms;
}

.toast.is-visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}