/**
 * 表單樣式 - 忠泰大華企業
 * 預約諮詢表單相關樣式
 * 
 * 設計特色：
 * - 標題：金色（#d4af37）
 * - 輸入欄位：白底、圓角、帶焦點效果
 * - 按鈕：金色漸層、hover 上浮效果
 * - 左右兩欄式版面（桌機）
 */

/* ===== 表單區塊 ===== */
.form-section {
  background-color: var(--color-bg-dark);
  position: relative;
  overflow: hidden;
}

/* 背景裝飾 */
.form-section::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
    135deg,
    var(--color-bg-darker) 0%,
    var(--color-bg-dark) 50%,
    var(--color-bg-darker) 100%
  );
  opacity: 0.5;
  pointer-events: none;
}

/* ===== 表單區塊包裝器（兩欄佈局） ===== */
.form-section__wrapper {
  display: flex;
  flex-direction: column;
  position: relative;
  min-height: 100vh;
  min-height: 100dvh;
  min-height: var(--app-height, 100vh);
}

/* ===== 左側圖片區塊 ===== */
.form-section__left {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: var(--spacing-8);
}

.form-section__brand {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: var(--radius-xl);
  overflow: hidden;
  margin-bottom: var(--spacing-6);
}

.form-section__brand-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.form-section__brand:hover .form-section__brand-img {
  transform: scale(1.05);
}

.form-section__brand-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    rgba(0, 0, 0, 0.2) 0%,
    rgba(0, 0, 0, 0.6) 100%
  );
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding: var(--spacing-6);
}

.form-section__logo {
  max-width: 180px;
  width: 50%;
  height: auto;
  filter: brightness(1.1);
}

/* 左側資訊區 */
.form-section__info {
  text-align: center;
  color: var(--color-text-light);
}

.form-section__info-title {
  font-family: var(--font-heading);
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  margin-bottom: var(--spacing-3);
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.form-section__info-text {
  font-size: var(--font-size-base);
  color: var(--color-text-muted);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--spacing-6);
}

.form-section__contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-3);
}

.form-section__contact-item {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-2);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.form-section__contact-icon {
  font-size: var(--font-size-lg);
}

/* ===== 右側表單區塊 ===== */
.form-section__right {
  padding: var(--spacing-8);
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ===== 表單容器 ===== */
.form-container {
  position: relative;
  width: 100%;
  max-width: 480px;
  background-color: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(212, 175, 55, 0.2);
  border-radius: var(--radius-xl);
  box-shadow: 
    0 25px 50px -12px rgba(0, 0, 0, 0.5),
    0 0 0 1px rgba(212, 175, 55, 0.1);
  padding: var(--spacing-8);
}

/* ===== 表單標題 ===== */
.form-header {
  text-align: center;
  margin-bottom: var(--spacing-8);
}

.form-header__title {
  font-family: var(--font-heading);
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  margin-bottom: var(--spacing-2);
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.form-header__subtitle {
  font-size: var(--font-size-base);
  color: var(--color-text-muted);
}

/* ===== 表單群組 ===== */
.form-group {
  margin-bottom: var(--spacing-6);
}

.form-group:last-of-type {
  margin-bottom: var(--spacing-8);
}

/* ===== 標籤 ===== */
.form-label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-light);
  margin-bottom: var(--spacing-2);
  letter-spacing: var(--letter-spacing-wide);
}

.form-label--required::after {
  content: " *";
  color: var(--color-primary);
  font-weight: var(--font-weight-bold);
}

/* ===== 輸入框 ===== */
.form-input {
  display: block;
  width: 100%;
  padding: var(--spacing-3) var(--spacing-4);
  font-size: var(--font-size-base);
  font-family: var(--font-primary);
  color: var(--color-text-dark);
  background-color: var(--color-white);
  border: 2px solid var(--color-gray-200);
  border-radius: var(--radius-lg);
  transition: all var(--transition-fast);
  outline: none;
}

.form-input::placeholder {
  color: var(--color-gray-400);
}

.form-input:hover {
  border-color: var(--color-gray-300);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.form-input:focus {
  border-color: var(--color-primary);
  box-shadow: 
    0 0 0 4px rgba(212, 175, 55, 0.15),
    0 2px 8px rgba(212, 175, 55, 0.2);
}

/* 輸入框狀態 */
.form-input--error {
  border-color: var(--color-error);
  background-color: rgba(244, 67, 54, 0.02);
}

.form-input--error:focus {
  border-color: var(--color-error);
  box-shadow: 
    0 0 0 4px rgba(244, 67, 54, 0.15),
    0 2px 8px rgba(244, 67, 54, 0.2);
}

.form-input--success {
  border-color: var(--color-success);
  background-color: rgba(76, 175, 80, 0.02);
}

.form-input--success:focus {
  border-color: var(--color-success);
  box-shadow: 
    0 0 0 4px rgba(76, 175, 80, 0.15),
    0 2px 8px rgba(76, 175, 80, 0.2);
}

/* 停用狀態 */
.form-input:disabled {
  background-color: var(--color-gray-100);
  cursor: not-allowed;
  opacity: 0.7;
}

/* ===== 文字區域 ===== */
.form-textarea {
  min-height: 120px;
  resize: vertical;
}

/* ===== 選擇框 ===== */
.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%236b7280'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'%3E%3C/path%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  background-size: 20px;
  padding-right: var(--spacing-10);
  cursor: pointer;
}

/* ===== 錯誤訊息 ===== */
.form-error {
  display: none;
  font-size: var(--font-size-sm);
  color: var(--color-error);
  margin-top: var(--spacing-1);
}

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

/* 錯誤圖示 */
.form-error::before {
  content: "⚠ ";
}

/* ===== 提示文字 ===== */
.form-hint {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  margin-top: var(--spacing-1);
}

/* ===== 核取方塊和單選按鈕 ===== */
.form-check {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-3);
  cursor: pointer;
}

.form-check__input {
  width: 20px;
  height: 20px;
  margin-top: 2px;
  accent-color: var(--color-primary);
  cursor: pointer;
  flex-shrink: 0;
}

.form-check__label {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  cursor: pointer;
  line-height: 1.5;
}

.form-check__label a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.form-check__label a:hover {
  color: var(--color-primary-light);
}

/* ===== 核取方塊群組 ===== */
.form-checkbox-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-3);
}

.form-checkbox {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  cursor: pointer;
  padding: var(--spacing-2) var(--spacing-3);
  background-color: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.form-checkbox:hover {
  background-color: rgba(255, 255, 255, 0.1);
  border-color: var(--color-primary);
}

.form-checkbox__input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.form-checkbox__box {
  width: 18px;
  height: 18px;
  border: 2px solid var(--color-gray-400);
  border-radius: var(--radius-sm);
  background-color: transparent;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

.form-checkbox__box::after {
  content: "";
  width: 10px;
  height: 6px;
  border-left: 2px solid var(--color-white);
  border-bottom: 2px solid var(--color-white);
  transform: rotate(-45deg) scale(0);
  transition: transform var(--transition-fast);
}

.form-checkbox__input:checked + .form-checkbox__box {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
}

.form-checkbox__input:checked + .form-checkbox__box::after {
  transform: rotate(-45deg) scale(1);
}

.form-checkbox__input:focus + .form-checkbox__box {
  box-shadow: 0 0 0 3px rgba(212, 175, 55, 0.3);
}

.form-checkbox__label {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  user-select: none;
}

/* ===== 提交按鈕 ===== */
.form-submit {
  width: 100%;
  padding: var(--spacing-4) var(--spacing-6);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  font-family: var(--font-primary);
  letter-spacing: var(--letter-spacing-wider);
  background: linear-gradient(
    135deg,
    var(--color-primary) 0%,
    var(--color-primary-light) 50%,
    var(--color-primary) 100%
  );
  background-size: 200% 200%;
  color: var(--color-bg-dark);
  border: none;
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-base);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-2);
  box-shadow: 
    0 4px 15px rgba(212, 175, 55, 0.3),
    0 2px 4px rgba(0, 0, 0, 0.1);
}

.form-submit:hover:not(:disabled) {
  background-position: 100% 0;
  transform: translateY(-3px);
  box-shadow: 
    0 8px 25px rgba(212, 175, 55, 0.4),
    0 4px 10px rgba(0, 0, 0, 0.15);
}

.form-submit:active:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: 
    0 4px 15px rgba(212, 175, 55, 0.3),
    0 2px 4px rgba(0, 0, 0, 0.1);
}

.form-submit:focus-visible {
  outline: 3px solid var(--color-primary-light);
  outline-offset: 2px;
}

.form-submit:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
  background: var(--color-gray-400);
  box-shadow: none;
}

/* 按鈕載入狀態 */
.form-submit--loading {
  position: relative;
  pointer-events: none;
}

.form-submit--loading .form-submit__text {
  visibility: hidden;
}

.form-submit--loading::after {
  content: "";
  position: absolute;
  width: 20px;
  height: 20px;
  border: 2px solid var(--color-white);
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* ===== 表單成功訊息 ===== */
.form-success {
  display: none;
  text-align: center;
  padding: var(--spacing-10);
}

.form-success--visible {
  display: block;
  animation: fadeInUp 0.5s ease-out;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.form-success__icon {
  width: 90px;
  height: 90px;
  margin: 0 auto var(--spacing-6);
  background: linear-gradient(
    135deg,
    var(--color-success) 0%,
    var(--color-success-light) 100%
  );
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  font-size: var(--font-size-4xl);
  animation: scaleIn 0.4s ease-out;
  box-shadow: 0 10px 30px rgba(76, 175, 80, 0.3);
}

@keyframes scaleIn {
  from {
    transform: scale(0);
    opacity: 0;
  }
  50% {
    transform: scale(1.1);
  }
  to {
    transform: scale(1);
    opacity: 1;
  }
}

.form-success__title {
  font-family: var(--font-heading);
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  margin-bottom: var(--spacing-3);
}

.form-success__text {
  font-size: var(--font-size-base);
  color: var(--color-text-muted);
  line-height: var(--line-height-relaxed);
}

/* ===== 輸入框群組（帶圖示） ===== */
.input-group {
  position: relative;
}

.input-group__icon {
  position: absolute;
  left: var(--spacing-3);
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-gray-400);
  pointer-events: none;
}

.input-group .form-input {
  padding-left: var(--spacing-10);
}

/* ===== 輸入框圖示（右側） ===== */
.input-group__suffix {
  position: absolute;
  right: var(--spacing-3);
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-gray-400);
}

/* ===== 電話欄位國碼選擇 ===== */
.phone-input {
  display: flex;
  gap: var(--spacing-2);
}

.phone-input__country {
  flex: 0 0 100px;
}

.phone-input__number {
  flex: 1;
}