/* ==========================================================================
   Reusable Form Component — Neutral / Corporate Design System
   用于企业 LP / Corporate Site 的通用表单组件
   包含：入力画面 / 確認画面 / エラー画面 / 送信完了画面
   ========================================================================== */

/* ==========================================================================
   Design Tokens
   —— 统一变量，方便未来按项目微调（颜色/圆角/间距均可在此处调整）
   ========================================================================== */
:root {
  /* Text */
  --form-text: #2a2a2a;
  --form-text-secondary: #6b6b6b;
  --form-placeholder: #999999;

  /* Surface */
  --form-surface: #ffffff;
  --form-surface-subtle: #f7f7f8;
  --form-surface-muted: #f2f2f3;

  /* Border */
  --form-border: #dcdcdc;
  --form-border-strong: #b7b7b7;
  --form-border-focus: #4d4d4d;

  /* Primary (Button / Selected state) */
  --form-primary: #262626;
  --form-primary-hover: #3d3d3d;
  --form-primary-disabled: #b0b0b0;
  --form-on-primary: #ffffff;

  /* Error */
  --form-error: #b3261e;
  --form-error-surface: #fbf3f2;
  --form-error-border: #e3b8b4;

  /* Radius */
  --form-radius: 7px;
  --form-radius-sm: 4px;

  /* Focus Ring */
  --form-focus-ring: 0 0 0 3px rgba(38, 38, 38, 0.08);
}

/* ==========================================================================
   Form Base
   ========================================================================== */
#myForm {
  width: 100%;
  max-width: 720px;
  display: grid;
  gap: 36px;
  margin-inline: auto;
  background: var(--form-surface);
  color: var(--form-text);
}

/* ==========================================================================
   Form Layout
   PC: label（200〜220px）+ field 横排 / SP: 纵向排列
   ========================================================================== */
.form-group {
  display: grid;
  gap: 12px 24px;
}

.form-group:has(> label + .form-input),
.form-group:has(> label + select) {
  grid-template-columns: 210px minmax(0, 1fr);
  align-items: start;
}

.form-group:has(> label + .form-input) label,
.form-group:has(> label + select) label {
  padding-top: 14px; /* 与 input 首行文字水平对齐 */
}

/* ==========================================================================
   Label
   ========================================================================== */
.form-group label,
.form-label {
  color: var(--form-text);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.6;
}

.form-group-tag {
  display: inline-block;
  margin-left: 8px;
  padding: 2px 6px;
  color: #a23a34;
  background: #f7e9e8;
  border-radius: var(--form-radius-sm);
  font-size: 11px;
  font-weight: 600;
  line-height: 1.5;
  vertical-align: 1px;
}

/* ==========================================================================
   Inputs / Textarea
   ========================================================================== */
.form-input,
#prefecture,
select.form-input {
  width: 100%;
  box-sizing: border-box;
  padding: 14px 16px;
  color: var(--form-text);
  background-color: var(--form-surface);
  border: 1px solid var(--form-border);
  border-radius: var(--form-radius);
  font: inherit;
  font-size: 16px;
  line-height: 1.5;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.form-input::placeholder {
  color: var(--form-placeholder);
  opacity: 1;
}

.form-input:hover:not(:focus):not(:disabled),
#prefecture:hover:not(:focus),
select.form-input:hover:not(:focus) {
  border-color: var(--form-border-strong);
}

.form-input:focus,
#prefecture:focus,
select.form-input:focus {
  outline: none;
  border-color: var(--form-border-focus);
  box-shadow: var(--form-focus-ring);
}

.form-input:disabled {
  color: var(--form-text-secondary);
  background-color: var(--form-surface-muted);
  cursor: not-allowed;
}

.form-textarea {
  width: 100%;
  min-height: 170px;
  resize: vertical;
  font: inherit;
}

/* ==========================================================================
   Select（下拉箭头）
   ========================================================================== */
#prefecture,
select.form-input {
  padding-right: 40px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%23666666' d='M6 8L0 0h12z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  background-size: 12px;
  appearance: none;
}

/* ==========================================================================
   Checkbox Group / Radio Group（当前项目暂未使用，保留供未来字段扩展）
   选中态：dark neutral background + white text，不使用蓝色
   ========================================================================== */
.checkbox__group-container {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.checkbox__group,
.radio__group {
  display: inline-flex;
  position: relative;
  width: 100%;
  align-items: center;
  cursor: pointer;
  user-select: none;
}

.checkbox_input,
.radio__group input[type="radio"] {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.checkbox_parts,
.radio__group span {
  display: flex;
  width: 100%;
  box-sizing: border-box;
  align-items: center;
  justify-content: center;
  padding: 11px 16px;
  color: var(--form-text);
  background: var(--form-surface);
  border: 1px solid var(--form-border);
  border-radius: var(--form-radius);
  font-size: 15px;
  line-height: 1.5;
  text-align: center;
  transition: border-color 0.15s ease, background-color 0.15s ease, color 0.15s ease;
}

.checkbox__group:hover .checkbox_parts,
.radio__group:hover span {
  border-color: var(--form-border-strong);
  background: var(--form-surface-subtle);
}

.checkbox_input:checked + .checkbox_parts,
.radio__group input[type="radio"]:checked + span {
  color: var(--form-on-primary);
  background: var(--form-primary);
  border-color: var(--form-primary);
  font-weight: 600;
}

.checkbox_input:focus-visible + .checkbox_parts,
.radio__group input[type="radio"]:focus-visible + span {
  box-shadow: var(--form-focus-ring);
}

.radio__group-container {
  display: grid;
  gap: 10px;
}

/* ==========================================================================
   Agreement（個人情報の取り扱い）
   保持简单：checkbox + 文字，不做成 card
   ========================================================================== */
.agree-checkbox {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 10px;
  padding-top: 4px;
}

.agree-checkbox input[type="checkbox"] {
  width: 18px;
  height: 18px;
  flex: 0 0 auto;
  margin: 2px 0 0;
  accent-color: var(--form-primary);
  cursor: pointer;
}

.agree-checkbox label {
  margin: 0;
  color: var(--form-text-secondary);
  font-size: 14px;
  font-weight: 400;
  line-height: 1.7;
  cursor: pointer;
  text-align: left;
}

/* ==========================================================================
   Submit / Shared Buttons
   ========================================================================== */
#myForm > .form-group:has(> #submit) {
  grid-template-columns: 1fr;
  margin-top: 4px;
}

#submit,
.form-button {
  display: inline-flex;
  width: 100%;
  max-width: 460px;
  min-height: 56px;
  box-sizing: border-box;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-inline: auto;
  padding: 14px 24px;
  border-radius: var(--form-radius);
  font: inherit;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.15s ease, border-color 0.15s ease, opacity 0.15s ease;
}

#submit,
.form-button--primary {
  color: var(--form-on-primary);
  background: var(--form-primary);
  border: 1px solid var(--form-primary);
}

#submit svg {
  flex: 0 0 auto;
  fill: currentColor;
}

#submit:hover:not(:disabled),
.form-button--primary:hover {
  background: var(--form-primary-hover);
  border-color: var(--form-primary-hover);
}

#submit:disabled {
  color: var(--form-on-primary);
  background: var(--form-primary-disabled);
  border-color: var(--form-primary-disabled);
  cursor: not-allowed;
  opacity: 1;
}

.form-button--secondary {
  color: var(--form-text);
  background: var(--form-surface);
  border: 1px solid var(--form-border-strong);
}

.form-button--secondary:hover {
  background: var(--form-surface-subtle);
  border-color: var(--form-text-secondary);
}

/* ==========================================================================
   Result Common（Confirmation / Error / Thanks 共享容器）
   ========================================================================== */
.form-result,
#formWrap {
  width: 100%;
  max-width: 760px;
  box-sizing: border-box;
  margin-inline: auto;
  padding: 40px;
}

.form-result__header {
  margin-bottom: 32px;
  text-align: center;
}

.form-result__title,
#formWrap h1,
#formWrap h3 {
  margin: 0 0 16px;
  padding: 0;
  color: var(--form-text);
  border: 0;
  font-size: clamp(24px, 3.6vw, 28px);
  font-weight: 600;
  line-height: 1.5;
  text-align: center;
}

.form-result__lead,
#formWrap p {
  margin: 0;
  color: var(--form-text-secondary);
  font-size: 15px;
  line-height: 1.9;
  text-align: center;
}

.form-result__actions,
.mail_send {
  display: flex;
  align-items: stretch;
  justify-content: center;
  gap: 14px;
  margin-top: 36px;
}

/* ==========================================================================
   Confirmation Table
   PC: label 30% / value 70%；避免 Excel 感——去除粗重边框，改用分隔线
   ========================================================================== */
.formTable {
  width: 100%;
  margin-bottom: 8px;
  background: var(--form-surface);
  border: 1px solid var(--form-border);
  border-radius: var(--form-radius);
  border-collapse: separate;
  border-spacing: 0;
  overflow: hidden;
}

.formTable tr + tr th,
.formTable tr + tr td {
  border-top: 1px solid var(--form-border);
}

.formTable th,
.formTable td {
  box-sizing: border-box;
  padding: 18px 20px;
  color: var(--form-text);
  font-size: 15px;
  line-height: 1.8;
  text-align: left;
  vertical-align: top;
}

.formTable th {
  width: 30%;
  background: var(--form-surface-subtle);
  color: var(--form-text-secondary);
  font-weight: 600;
}

.formTable td {
  width: 70%;
  background: var(--form-surface);
}

/* ==========================================================================
   Error
   ========================================================================== */
.form-error__box {
  padding: 28px;
  background: var(--form-error-surface);
  border: 1px solid var(--form-error-border);
  border-radius: 8px;
}

.form-error__list {
  margin-top: 20px;
  display: grid;
  gap: 10px;
}

.form-error__list .error_messe,
.error-message,
.error_messe {
  margin: 0;
  color: var(--form-error);
  font-size: 14px;
  line-height: 1.7;
  text-align: left;
}

/* ==========================================================================
   Thanks
   仅通过留白与排版制造「完成感」，不使用图标/插画
   ========================================================================== */
section.thanks {
  padding-block: 88px;
}

section.thanks .container {
  width: min(100% - 32px, 900px);
  margin-inline: auto;
}

.form-thanks {
  max-width: 640px;
}

.form-thanks .form-result__lead {
  margin-top: 4px;
}

/* ==========================================================================
   Accessibility
   ========================================================================== */
#myForm :focus-visible,
.form-result :focus-visible,
#formWrap :focus-visible {
  outline: 2px solid var(--form-border-focus);
  outline-offset: 3px;
}

/* ==========================================================================
   Responsive — 仅处理 max-width: 768px 一个断点
   ========================================================================== */
@media screen and (max-width: 768px) {
  #myForm {
    gap: 28px;
    padding-inline: 4px;
  }

  .form-group:has(> label + .form-input),
  .form-group:has(> label + select) {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .form-group:has(> label + .form-input) label,
  .form-group:has(> label + select) label {
    padding-top: 0;
  }

  .checkbox__group-container {
    grid-template-columns: 1fr;
  }

  .agree-checkbox {
    justify-content: flex-start;
  }

  #submit,
  .form-button {
    max-width: none;
  }

  .form-result,
  #formWrap {
    padding: 28px 18px;
  }

  .form-result__title,
  #formWrap h1,
  #formWrap h3 {
    font-size: 22px;
  }

  .formTable th,
  .formTable td {
    display: block;
    width: 100%;
    padding: 14px 16px;
  }

  .formTable th {
    padding-bottom: 6px;
    border-top: 1px solid var(--form-border);
  }

  .formTable td {
    padding-top: 0;
  }

  .formTable tr:first-child th {
    border-top: 0;
  }

  .form-result__actions,
  .mail_send {
    flex-direction: column-reverse;
    gap: 10px;
  }

  section.thanks {
    padding-block: 56px;
  }

  .form-error__box {
    padding: 20px 16px;
  }
}