:root {
  --bg: var(--tg-theme-bg-color, #ffffff);
  --text: var(--tg-theme-text-color, #1c1c1e);
  --hint: var(--tg-theme-hint-color, #8e8e93);
  --link: var(--tg-theme-link-color, #2481cc);
  --button: var(--tg-theme-button-color, #2481cc);
  --button-text: var(--tg-theme-button-text-color, #ffffff);
  --secondary-bg: var(--tg-theme-secondary-bg-color, #f1f1f4);
  --danger: #e5484d;
  --radius: 12px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: var(--tg-theme-bg-color, #17212b);
    --text: var(--tg-theme-text-color, #f5f5f5);
    --hint: var(--tg-theme-hint-color, #7d8b99);
    --link: var(--tg-theme-link-color, #6ab7ff);
    --button: var(--tg-theme-button-color, #5288c1);
    --button-text: var(--tg-theme-button-text-color, #ffffff);
    --secondary-bg: var(--tg-theme-secondary-bg-color, #232e3c);
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.4;
  -webkit-text-size-adjust: 100%;
}

.wrap {
  max-width: 520px;
  margin: 0 auto;
  padding: 16px 16px calc(24px + env(safe-area-inset-bottom));
}

.title {
  font-size: 22px;
  font-weight: 700;
  margin: 4px 0 2px;
}

.subtitle {
  color: var(--hint);
  font-size: 14px;
  margin: 0 0 20px;
}

.env-warning {
  background: #fff4e5;
  color: #7a4b00;
  border: 1px solid #ffcf8b;
  border-radius: var(--radius);
  padding: 10px 12px;
  font-size: 13px;
  margin-bottom: 16px;
}

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

.field label {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 6px;
}

input, textarea, select {
  width: 100%;
  font: inherit;
  color: var(--text);
  background: var(--secondary-bg);
  border: 1.5px solid transparent;
  border-radius: var(--radius);
  padding: 12px 14px;
  outline: none;
  transition: border-color .15s ease;
  -webkit-appearance: none;
  appearance: none;
}

textarea {
  resize: vertical;
  min-height: 72px;
}

select {
  background-image:
    linear-gradient(45deg, transparent 50%, var(--hint) 50%),
    linear-gradient(135deg, var(--hint) 50%, transparent 50%);
  background-position:
    calc(100% - 20px) calc(50% - 3px),
    calc(100% - 14px) calc(50% - 3px);
  background-size: 6px 6px, 6px 6px;
  background-repeat: no-repeat;
  padding-right: 40px;
}

input::placeholder, textarea::placeholder { color: var(--hint); }

input:focus, textarea:focus, select:focus {
  border-color: var(--button);
}

.field.invalid input,
.field.invalid textarea,
.field.invalid select {
  border-color: var(--danger);
}

.error {
  color: var(--danger);
  font-size: 13px;
  margin-top: 6px;
  min-height: 0;
  display: none;
}

.field.invalid .error {
  display: block;
}

.form-error {
  color: var(--danger);
  font-size: 14px;
  margin: 4px 0 12px;
  min-height: 0;
  display: none;
}

.form-error.show { display: block; }

.submit-btn {
  width: 100%;
  font: inherit;
  font-weight: 600;
  color: var(--button-text);
  background: var(--button);
  border: none;
  border-radius: var(--radius);
  padding: 14px;
  cursor: pointer;
  margin-top: 8px;
}

.submit-btn:disabled {
  opacity: .6;
  cursor: default;
}

.success-screen {
  text-align: center;
  padding: 48px 16px;
}

.success-icon {
  width: 64px;
  height: 64px;
  line-height: 64px;
  margin: 0 auto 16px;
  border-radius: 50%;
  background: var(--button);
  color: var(--button-text);
  font-size: 34px;
  font-weight: 700;
}

.success-screen h2 {
  font-size: 20px;
  margin: 0 0 8px;
}

.success-screen p {
  color: var(--hint);
  margin: 0 0 24px;
}

/* When Telegram MainButton is used, hide the fallback submit button */
body.tg-mainbutton .submit-btn#submit-btn { display: none; }