* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--tg-theme-bg-color, #1a1a2e);
  color: var(--tg-theme-text-color, #fff);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.container {
  text-align: center;
  padding: 24px;
  max-width: 320px;
  width: 100%;
}

.screen {
  animation: fadeIn 0.3s ease;
}

.screen.hidden {
  display: none;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Spinner */
.spinner {
  width: 48px;
  height: 48px;
  border: 4px solid var(--tg-theme-hint-color, rgba(255,255,255,0.2));
  border-top-color: var(--tg-theme-button-color, #5288c1);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 0 auto 16px;
}

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

/* Icons */
.icon {
  font-size: 48px;
  margin-bottom: 16px;
}

.success-icon {
  animation: bounce 0.5s ease;
}

.error-icon {
  animation: shake 0.5s ease;
}

@keyframes bounce {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.2); }
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-5px); }
  75% { transform: translateX(5px); }
}

h1 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 8px;
}

.subtitle {
  font-size: 14px;
  opacity: 0.7;
  margin-bottom: 32px;
}

/* Captcha Box */
.captcha-box {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 24px;
}

.captcha-box .operator,
.captcha-box .equals {
  opacity: 0.5;
}

.captcha-box input {
  width: 80px;
  height: 56px;
  font-size: 28px;
  font-weight: 700;
  text-align: center;
  border: 2px solid var(--tg-theme-button-color, #5288c1);
  border-radius: 12px;
  background: transparent;
  color: var(--tg-theme-text-color, #fff);
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.captcha-box input:focus {
  border-color: var(--tg-theme-button-color, #5288c1);
  box-shadow: 0 0 0 3px rgba(82, 136, 193, 0.3);
}

.captcha-box input.error {
  border-color: #ff6b6b;
  animation: shake 0.3s ease;
}

/* Button */
.submit-btn {
  width: 100%;
  padding: 16px;
  font-size: 16px;
  font-weight: 600;
  border: none;
  border-radius: 12px;
  background: var(--tg-theme-button-color, #5288c1);
  color: var(--tg-theme-button-text-color, #fff);
  cursor: pointer;
  transition: opacity 0.2s, transform 0.1s;
}

.submit-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

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

.submit-btn.loading {
  pointer-events: none;
  opacity: 0.7;
}

/* Error text */
.error {
  color: #ff6b6b;
  font-size: 14px;
  margin-top: 16px;
  min-height: 20px;
}