:root {
  --green-main: #2cb632;
  --green-soft: #e8f9ea;
  --green-deep: #1f8f24;
  --text-main: #1b2a1d;
  --white: #ffffff;
  --error-accent: #d93025;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Inter", Arial, sans-serif;
  color: var(--text-main);
  background:
    radial-gradient(circle at 12% 12%, rgba(44, 182, 50, 0.2), transparent 30%),
    radial-gradient(circle at 85% 85%, rgba(44, 182, 50, 0.16), transparent 28%),
    linear-gradient(180deg, #ffffff 0%, #f6fff6 100%);
}

.page {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.card {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  width: min(100%, 460px);
  background: var(--white);
  border: 2px solid #dff4e0;
  border-radius: 20px;
  padding: 28px 24px;
  box-shadow: 0 16px 35px rgba(44, 182, 50, 0.14);
}

.card.card--join-success {
  min-height: min(420px, 85vh);
}

.card.card--join-success .join-result {
  flex: 1;
  justify-content: center;
}

.brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}

.brand__logo {
  width: 96px;
  height: 96px;
  object-fit: contain;
}

.brand__title {
  margin: 0;
  font-family: "Comfortaa", Arial, sans-serif;
  font-size: 1.55rem;
  line-height: 1.2;
  color: var(--green-main);
  text-align: center;
}

.join-form-shell[hidden] {
  display: none !important;
}

.card__subtitle {
  margin: 0 0 18px;
  text-align: center;
  color: #436346;
  font-size: 0.98rem;
}

.form {
  display: grid;
  gap: 12px;
}

.form__label {
  font-size: 0.95rem;
  font-weight: 600;
}

.required {
  color: #e52525;
}

.form__input {
  width: 100%;
  border: 1.8px solid #c8ebca;
  border-radius: 12px;
  padding: 12px 14px;
  font-size: 1.08rem;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form__input:focus {
  outline: none;
  border-color: var(--green-main);
  box-shadow: 0 0 0 4px rgba(44, 182, 50, 0.15);
}

.form__input.form__input--invalid {
  border-color: var(--error-accent);
  box-shadow: 0 0 0 4px rgba(217, 48, 37, 0.12);
}

.form__error {
  min-height: 16px;
  margin: -6px 0 2px;
  font-size: 0.82rem;
  line-height: 1.25;
  color: var(--error-accent);
}

.form__message {
  min-height: 0;
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.35;
}

.form__message:not(:empty) {
  margin-top: 4px;
}

.form__message--after-form:not(:empty) {
  margin-top: 14px;
}

.join-result {
  display: flex;
  flex-direction: column;
  width: 100%;
}

.card:not(.card--join-success) .join-result {
  align-items: stretch;
  text-align: left;
}

.card:not(.card--join-success) .join-result .form__message--after-form:not(:empty) {
  margin-top: 14px;
}

.card.card--join-success .join-result {
  align-items: center;
  text-align: center;
}

.card.card--join-success .join-result .form__message--after-form:not(:empty) {
  margin-top: 0;
  max-width: 100%;
}

.card.card--join-success .join-result .join-open-app {
  width: 100%;
  max-width: 320px;
  align-self: center;
}

.form__message--error {
  color: var(--error-accent);
}

.form__message--success {
  color: var(--green-deep);
}

.join-open-app {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 10px;
}

.join-open-app__hint {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.4;
  text-align: center;
  color: #436346;
}

.join-open-app a.join-open-app__btn {
  display: block;
  box-sizing: border-box;
  text-align: center;
  text-decoration: none;
}

.form__button {
  margin-top: 8px;
  border: none;
  border-radius: 12px;
  padding: 13px 16px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--white);
  background: linear-gradient(180deg, #37c73d 0%, var(--green-main) 100%);
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.form__button:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 16px rgba(44, 182, 50, 0.25);
}

.form__button:active {
  transform: translateY(0);
  background: linear-gradient(180deg, #2fb735 0%, var(--green-deep) 100%);
}

@media (max-width: 460px) {
  .card {
    padding: 22px 18px;
    border-radius: 16px;
  }

  .brand__title {
    font-size: 1.35rem;
  }
}