/* ========================================
   PAGES-LOGIN.CSS — 登入 / 註冊頁面樣式
   ======================================== */

/* ── 整體佈局 ── */
.auth-page {
  display: flex;
  min-height: calc(100vh - 4rem); /* 扣除 sticky header 高度 */
}

/* ── 左側圖片 ── */
.auth-photo {
  flex: 0 0 38%;
  overflow: hidden;
}

.auth-photo__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* ── 右側表單面板 ── */
.auth-panel {
  flex: 1;
  display: flex;
  flex-direction: column;
  background-color: var(--color-white);
}

/* ── Tab 列 ── */
.auth-tabs {
  display: flex;
  border-bottom: 1px solid rgba(0, 0, 0, 0.1);
  flex-shrink: 0;
}

.auth-tab {
  flex: 1;
  padding: var(--space-4) var(--space-6);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  font-family: var(--font-sans);
  font-size: var(--text-md);
  font-weight: var(--fw-semibold);
  color: var(--color-text-light);
  cursor: pointer;
  transition: color var(--transition-base), border-color var(--transition-base);
}

.auth-tab.is-active {
  color: var(--color-dark);
  border-bottom-color: var(--color-primary);
}

/* ── 表單 Panel ── */
.auth-form {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-10) var(--space-12);
}

.auth-form[hidden] {
  display: none;
}

.auth-form__inner {
  width: 100%;
  max-width: 360px;
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

/* 註冊表單大標題 */
.auth-form__title {
  font-family: var(--font-serif);
  font-size: var(--text-2xl);
  font-weight: var(--fw-bold);
  color: var(--color-dark);
  text-align: center;
  margin-bottom: var(--space-1);
}

/* ── 服務條款連結 ── */
.auth-terms-link {
  color: var(--color-primary);
  text-decoration: underline;
}

/* ── 按鈕 ── */
.auth-btn {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: var(--fw-semibold);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  border: none;
  transition: opacity var(--transition-base);
}

.auth-btn:hover {
  opacity: 0.85;
}

.auth-btn--line {
  background-color: var(--color-white);
  color: var(--color-dark);
  border: 1px solid rgba(0, 0, 0, 0.15);
}

.auth-btn__icon {
  width: 24px;
  height: 24px;
  object-fit: contain;
}

/* ── 表單錯誤 / 震動 ── */
@keyframes auth-shake {
  0%, 100% { transform: translateX(0); }
  15%       { transform: translateX(-6px); }
  30%       { transform: translateX(5px); }
  45%       { transform: translateX(-4px); }
  60%       { transform: translateX(3px); }
  75%       { transform: translateX(-2px); }
}

.form-input.is-error {
  border-color: #c0392b;
  box-shadow: 0 0 0 3px rgba(192,57,43,0.12);
}

.form-input.is-shake,
.form-check-row.is-shake {
  animation: auth-shake 0.4s ease;
}

.form-check-row.is-error .form-checkbox {
  outline: 2px solid #c0392b;
  outline-offset: 2px;
  border-radius: 3px;
}


/* ── 忘記密碼 Panel ── */
.auth-back-btn {
  display: inline-flex;
  align-items: center;
  background: none;
  border: none;
  padding: 0;
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  color: var(--color-text-light);
  cursor: pointer;
  transition: color var(--transition-fast);
}

.auth-back-btn:hover {
  color: var(--color-dark);
}

.auth-form__subtitle {
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  color: var(--color-text-light);
  text-align: center;
  line-height: var(--lh-normal);
  margin-top: calc(-1 * var(--space-2));
}

.auth-tabs[hidden] {
  display: none;
}


/* ── 忘記密碼 link ── */
.auth-link {
  text-align: center;
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  color: var(--color-primary);
  text-decoration: none;
}

.auth-link:hover {
  text-decoration: underline;
}

/* ── 平板 / 手機：隱藏左側圖片 ── */
@media (max-width: 767px) {
  .auth-photo {
    display: none;
  }

  .auth-form {
    padding: var(--space-8) var(--space-6);
  }
}

@media (max-width: 1199px) and (min-width: 768px) {
  .auth-photo {
    flex: 0 0 30%;
  }

  .auth-form {
    padding: var(--space-8) var(--space-8);
  }
}