/* ===========================================
   Contact Form — Single-page Sleek Design
   フローティングラベル + チップ選択 + グラスモーフィズム
   =========================================== */

.contact {
  background-color: var(--color-bg-soft);
  position: relative;
}

.contact::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at top right, rgba(34, 190, 240, 0.06), transparent 50%),
    radial-gradient(ellipse at bottom left, rgba(0, 99, 138, 0.05), transparent 50%);
  pointer-events: none;
}

.contact__inner {
  position: relative;
  z-index: 1;
  max-width: 760px;
  margin-inline: auto;
}

.contact__form {
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid rgba(255, 255, 255, 0.5);
  border-radius: var(--radius-lg);
  padding: 1.75rem 1.25rem;
  box-shadow:
    0 20px 60px rgba(0, 99, 138, 0.10),
    inset 0 1px 0 rgba(255, 255, 255, 0.8);
  margin-top: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

@media (min-width: 480px) {
  .contact__form {
    padding: var(--space-5);
    margin-top: var(--space-6);
  }
}

@media (min-width: 768px) {
  .contact__form {
    padding: var(--space-6);
    gap: 1.75rem;
  }
}

@supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  .contact__form {
    background: rgba(255, 255, 255, 0.96);
  }
}

/* ---------- Field & Floating Label ---------- */
.contact__field {
  position: relative;
  display: flex;
  flex-direction: column;
}

.contact__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 640px) {
  .contact__row {
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
  }
}

.contact__label {
  font-size: 0.8125rem;
  font-weight: var(--fw-bold);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text);
  margin-bottom: 0.75rem;
  display: block;
}

.contact__required {
  color: var(--color-accent-sky);
  margin-left: 2px;
}

/* インプット & テキストエリア */
.contact__input,
.contact__textarea {
  width: 100%;
  padding: 1.25rem 1rem 0.5rem;
  font-family: var(--font-body);
  font-size: 16px; /* iOS ズーム防止 */
  color: var(--color-text);
  background-color: rgba(255, 255, 255, 0.5);
  border: 1.5px solid rgba(0, 99, 138, 0.15);
  border-radius: var(--radius-sm);
  transition:
    border-color var(--duration-fast) var(--ease-out),
    background-color var(--duration-fast) var(--ease-out),
    box-shadow var(--duration-fast) var(--ease-out);
  -webkit-appearance: none;
  appearance: none;
  outline: none;
  min-height: 56px;
}

@media (min-width: 768px) {
  .contact__input,
  .contact__textarea {
    font-size: 1rem;
  }
}

.contact__textarea {
  resize: vertical;
  min-height: 120px;
  padding-top: 1.5rem;
  font-family: var(--font-body);
  line-height: 1.7;
}

.contact__input:hover,
.contact__textarea:hover {
  border-color: rgba(0, 99, 138, 0.3);
  background-color: rgba(255, 255, 255, 0.7);
}

.contact__input:focus,
.contact__textarea:focus {
  border-color: var(--color-accent-sky);
  background-color: var(--color-base);
  box-shadow: 0 0 0 4px rgba(34, 190, 240, 0.12);
}

/* フローティングラベル */
.contact__floating-label {
  position: absolute;
  top: 1rem;
  left: 1rem;
  font-size: 1rem;
  font-weight: var(--fw-medium);
  color: var(--color-text-sub);
  pointer-events: none;
  transform-origin: left top;
  transition: all 0.2s var(--ease-out);
  background: transparent;
  padding-inline: 4px;
}

.contact__input:focus ~ .contact__floating-label,
.contact__input:not(:placeholder-shown) ~ .contact__floating-label,
.contact__textarea:focus ~ .contact__floating-label,
.contact__textarea:not(:placeholder-shown) ~ .contact__floating-label {
  top: 4px;
  font-size: 0.7rem;
  font-weight: var(--fw-bold);
  letter-spacing: 0.04em;
  color: var(--color-accent-sky);
}

/* バリデーションエラー */
.contact__error {
  font-size: 0.75rem;
  color: #E53935;
  min-height: 1em;
  margin-top: 4px;
  padding-left: 0.25rem;
}

.contact__input[aria-invalid="true"],
.contact__textarea[aria-invalid="true"] {
  border-color: #E53935;
  background-color: rgba(229, 57, 53, 0.04);
}

/* ---------- 用途チップ ---------- */
.contact__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.contact__chip-input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.contact__chip {
  display: inline-flex;
  align-items: center;
  padding: 0.625rem 1.125rem;
  font-size: 0.875rem;
  font-weight: var(--fw-semibold);
  color: var(--color-text-sub);
  background-color: rgba(255, 255, 255, 0.6);
  border: 1.5px solid rgba(0, 99, 138, 0.15);
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  min-height: var(--tap-min);
}

.contact__chip:hover {
  border-color: var(--color-accent-sky);
  color: var(--color-text);
  background-color: rgba(34, 190, 240, 0.08);
  transform: translateY(-1px);
}

.contact__chip-input:checked + .contact__chip {
  background:
    linear-gradient(135deg, #00638A 0%, #0086B5 50%, #00638A 100%);
  background-size: 200% 100%;
  border-color: transparent;
  color: var(--color-base);
  box-shadow: 0 6px 16px rgba(0, 99, 138, 0.25);
}

.contact__chip-input:focus-visible + .contact__chip {
  outline: 3px solid var(--color-accent-sky);
  outline-offset: 3px;
}

/* ---------- 送信ボタン領域 ---------- */
.contact__submit-area {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: stretch;
  margin-top: 0.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid rgba(0, 99, 138, 0.1);
}

@media (min-width: 640px) {
  .contact__submit-area {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
  }
}

.contact__privacy {
  font-size: 0.8125rem;
  color: var(--color-text-sub);
  line-height: 1.6;
  flex: 1;
}

.contact__privacy a {
  color: var(--color-accent-sky);
  text-decoration: underline;
  text-underline-offset: 2px;
  font-weight: var(--fw-semibold);
}

.contact__privacy a:hover {
  color: var(--color-text);
}

.contact__submit {
  flex-shrink: 0;
  min-width: 200px;
}

.contact__submit svg {
  transition: transform var(--duration-fast) var(--ease-out);
}

.contact__submit:hover svg {
  transform: translateX(4px);
}

/* ---------- ハニーポット (隠し) ---------- */
.contact__honeypot {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  opacity: 0;
}

/* ---------- fieldset リセット ---------- */
.contact__fieldset {
  border: 0;
  padding: 0;
  margin: 0;
}

.contact__fieldset .contact__label {
  margin-bottom: 0.75rem;
}

/* ---------- ご希望チェックボックス群 ---------- */
.contact__checkboxes {
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
}

@media (min-width: 640px) {
  .contact__checkboxes {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 0.625rem;
  }
}

.contact__checkbox {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  padding: 0.625rem 1rem 0.625rem 0.875rem;
  font-size: 0.9375rem;
  font-weight: var(--fw-semibold);
  color: var(--color-text-sub);
  background-color: rgba(255, 255, 255, 0.6);
  border: 1.5px solid rgba(0, 99, 138, 0.15);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  min-height: var(--tap-min);
}

.contact__checkbox:hover {
  border-color: var(--color-accent-lime);
  color: var(--color-text);
  background-color: rgba(179, 210, 53, 0.08);
  transform: translateY(-1px);
}

.contact__checkbox input[type="checkbox"] {
  position: absolute;
  opacity: 0;
  pointer-events: none;
  width: 0;
  height: 0;
}

.contact__checkbox-box {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  background-color: var(--color-base);
  border: 2px solid rgba(0, 99, 138, 0.30);
  border-radius: 6px;
  transition: all var(--duration-fast) var(--ease-out);
  flex-shrink: 0;
  position: relative;
}

.contact__checkbox-box::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='none' stroke='%23FFFFFF' stroke-width='2.6' stroke-linecap='round' stroke-linejoin='round'><path d='M3 8.5l3.2 3.2L13 4.5'/></svg>");
  background-size: 70% 70%;
  background-repeat: no-repeat;
  background-position: center;
  opacity: 0;
  transform: scale(0.6);
  transition: all var(--duration-fast) var(--ease-out);
}

.contact__checkbox input[type="checkbox"]:checked + .contact__checkbox-box {
  background: linear-gradient(135deg, var(--color-accent-lime) 0%, var(--color-accent-lime-hover) 100%);
  border-color: var(--color-accent-lime-hover);
  box-shadow: 0 4px 12px rgba(179, 210, 53, 0.35);
}

.contact__checkbox input[type="checkbox"]:checked + .contact__checkbox-box::after {
  opacity: 1;
  transform: scale(1);
}

.contact__checkbox input[type="checkbox"]:checked ~ .contact__checkbox-text {
  color: var(--color-text);
}

.contact__checkbox:has(input[type="checkbox"]:checked) {
  border-color: rgba(179, 210, 53, 0.55);
  background-color: rgba(179, 210, 53, 0.08);
  color: var(--color-text);
}

.contact__checkbox input[type="checkbox"]:focus-visible + .contact__checkbox-box {
  outline: 3px solid var(--color-accent-sky);
  outline-offset: 3px;
}

.contact__checkbox-text {
  line-height: 1.4;
  transition: color var(--duration-fast) var(--ease-out);
}

/* ============================================================
   同梱物バッジ（フォーム上に配置：工数削減ベネフィット訴求）
   ============================================================ */
.contact__bundle {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.625rem;
  margin: var(--space-3) auto var(--space-4);
  padding: 0;
  list-style: none;
  max-width: 920px;
}

@media (min-width: 640px) {
  .contact__bundle {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
  }
}

@media (min-width: 1024px) {
  .contact__bundle {
    grid-template-columns: repeat(4, 1fr);
    gap: 0.75rem;
    margin-top: var(--space-4);
    margin-bottom: var(--space-5);
  }
}

.contact__bundle-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.875rem 1rem;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.9) 0%, rgba(245, 250, 252, 0.85) 100%);
  border: 1px solid rgba(179, 210, 53, 0.45);
  border-radius: var(--radius-md);
  box-shadow:
    0 4px 14px rgba(0, 99, 138, 0.05),
    inset 0 1px 0 rgba(255, 255, 255, 0.7);
  position: relative;
  overflow: hidden;
  transition: transform 0.3s var(--ease-out), box-shadow 0.3s var(--ease-out);
}

.contact__bundle-item::before {
  content: '';
  position: absolute;
  top: -30px;
  right: -30px;
  width: 80px;
  height: 80px;
  background: radial-gradient(circle, rgba(179, 210, 53, 0.30) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
  opacity: 0.6;
  transition: opacity 0.3s var(--ease-out);
}

.contact__bundle-item:hover {
  transform: translateY(-2px);
  box-shadow:
    0 10px 24px rgba(179, 210, 53, 0.18),
    inset 0 1px 0 rgba(255, 255, 255, 0.9);
}

.contact__bundle-item:hover::before {
  opacity: 1;
}

.contact__bundle-icon {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-accent-lime) 0%, var(--color-accent-lime-hover) 100%);
  color: var(--color-text);
  border-radius: 10px;
  box-shadow: 0 4px 10px rgba(179, 210, 53, 0.35);
  position: relative;
  z-index: 1;
}

.contact__bundle-icon svg {
  width: 20px;
  height: 20px;
}

.contact__bundle-item > div {
  flex: 1;
  min-width: 0;
  position: relative;
  z-index: 1;
}

.contact__bundle-title {
  display: block;
  font-family: var(--font-heading);
  font-size: 0.9375rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--color-text);
  line-height: 1.35;
  margin-bottom: 0.125rem;
}

.contact__bundle-sub {
  display: block;
  font-family: var(--font-sans);
  font-size: 0.75rem;
  line-height: 1.5;
  color: var(--color-text-sub);
}

@media (min-width: 1024px) {
  .contact__bundle-sub {
    font-size: 0.8125rem;
  }
}