/* ==========================================================================
   IT Agency - Contact Form Styles
   デザイン原則: 影なし・角丸なし・完全モノクロ・CSS変数経由
   ========================================================================== */

/* ── LINE バナー ── */
.cf-line-banner {
  display: flex;
  align-items: center;
  gap: 32px;
  flex-wrap: wrap;
  padding: 40px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  margin-bottom: 80px;
}
.cf-line-text {
  font-family: var(--sans-jp);
  font-size: 14px;
  color: var(--fg-mid);
}

/* ── エラーバナー ── */
.cf-error-msg {
  background: var(--fg);
  color: var(--bg);
  padding: 20px 28px;
  font-family: var(--sans-jp);
  font-size: 14px;
  line-height: 1.7;
  margin-bottom: 40px;
}

/* ── ステップ表示制御 ── */
.cf-step[hidden] { display: none; }

/* ── フィールドグリッド ── */
.cf-fields {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px 60px;
  margin-bottom: 48px;
}
.cf-field--full { grid-column: 1 / -1; }
.cf-field { display: flex; flex-direction: column; }

/* ── ラベル ── */
.cf-field > label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: lowercase;
  color: var(--fg-mid);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.cf-label-text { color: var(--fg-mid); }

.cf-required {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.1em;
  color: var(--fg);
  border: 1px solid var(--fg);
  padding: 2px 6px;
  white-space: nowrap;
}
.cf-optional {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.1em;
  color: var(--fg-soft);
  border: 1px solid var(--fg-soft);
  padding: 2px 6px;
  white-space: nowrap;
}

/* ── テキスト入力 / メール / 電話 ── */
.cf-field input[type="text"],
.cf-field input[type="email"],
.cf-field input[type="tel"] {
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--line-strong);
  padding: 14px 0;
  font-family: var(--sans-jp);
  font-size: 15px;
  font-weight: 300;
  color: var(--fg);
  outline: none;
  transition: border-color 0.3s;
  width: 100%;
  -webkit-appearance: none;
  appearance: none;
  border-radius: 0;
}
.cf-field input[type="text"]:focus,
.cf-field input[type="email"]:focus,
.cf-field input[type="tel"]:focus {
  border-bottom-color: var(--fg);
}
.cf-field input[type="text"]::placeholder,
.cf-field input[type="email"]::placeholder,
.cf-field input[type="tel"]::placeholder {
  color: var(--fg-soft);
  font-weight: 300;
}

/* ── セレクト ── */
.cf-select-wrap {
  position: relative;
  border-bottom: 1px solid var(--line-strong);
  transition: border-color 0.3s;
}
.cf-select-wrap::after {
  content: "";
  position: absolute;
  right: 4px;
  top: 50%;
  transform: translateY(-60%) rotate(45deg);
  width: 8px;
  height: 8px;
  border-right: 1px solid var(--fg-mid);
  border-bottom: 1px solid var(--fg-mid);
  pointer-events: none;
}
.cf-select-wrap select {
  width: 100%;
  background: transparent;
  border: none;
  padding: 14px 28px 14px 0;
  font-family: var(--sans-jp);
  font-size: 15px;
  font-weight: 300;
  color: var(--fg);
  outline: none;
  -webkit-appearance: none;
  appearance: none;
  border-radius: 0;
  cursor: pointer;
}
.cf-select-wrap:focus-within { border-bottom-color: var(--fg); }

/* ── テキストエリア ── */
.cf-field textarea {
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--line-strong);
  padding: 14px 0;
  font-family: var(--sans-jp);
  font-size: 15px;
  font-weight: 300;
  color: var(--fg);
  outline: none;
  transition: border-color 0.3s;
  width: 100%;
  resize: vertical;
  min-height: 140px;
  line-height: 1.8;
  -webkit-appearance: none;
  appearance: none;
  border-radius: 0;
}
.cf-field textarea:focus { border-bottom-color: var(--fg); }
.cf-field textarea::placeholder { color: var(--fg-soft); font-weight: 300; }

/* ── チェックボックス（プライバシー） ── */
.cf-field--privacy .cf-checkbox-label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--fg-mid);
  margin-bottom: 12px;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  cursor: pointer;
}
.cf-field--privacy input[type="checkbox"] {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}
.cf-checkbox-custom {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  border: 1px solid var(--line-strong);
  position: relative;
  margin-top: 1px;
  transition: background 0.2s, border-color 0.2s;
}
.cf-field--privacy input[type="checkbox"]:checked ~ .cf-checkbox-custom,
.cf-field--privacy input[type="checkbox"]:checked + .cf-checkbox-custom {
  background: var(--fg);
  border-color: var(--fg);
}
.cf-field--privacy input[type="checkbox"]:checked ~ .cf-checkbox-custom::after,
.cf-field--privacy input[type="checkbox"]:checked + .cf-checkbox-custom::after {
  content: "";
  position: absolute;
  left: 5px;
  top: 2px;
  width: 5px;
  height: 9px;
  border-right: 1.5px solid var(--bg);
  border-bottom: 1.5px solid var(--bg);
  transform: rotate(45deg);
}
.cf-field--privacy input[type="checkbox"]:focus-visible + .cf-checkbox-custom {
  outline: 2px solid var(--fg);
  outline-offset: 2px;
}
.cf-checkbox-text {
  font-family: var(--sans-jp);
  font-size: 13px;
  font-weight: 300;
  color: var(--fg);
  line-height: 1.7;
  text-transform: none;
  letter-spacing: 0;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.cf-checkbox-text a {
  color: var(--fg);
  border-bottom: 1px solid var(--fg-soft);
  transition: border-color 0.3s;
}
.cf-checkbox-text a:hover { border-bottom-color: var(--fg); }

/* ── エラー表示 ── */
.cf-field-error {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.05em;
  color: var(--fg);
  margin-top: 8px;
  min-height: 16px;
  line-height: 1.5;
}

/* エラー状態のフィールド */
.cf-field input.has-error,
.cf-field textarea.has-error {
  border-bottom-color: var(--fg);
}
.cf-select-wrap.has-error { border-bottom-color: var(--fg); }

/* ── ハニーポット（完全非表示） ── */
.cf-honeypot {
  position: absolute;
  left: -9999px;
  top: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
  opacity: 0;
  pointer-events: none;
}

/* ── フォームアクション ── */
.cf-form-actions {
  display: flex;
  justify-content: flex-end;
  padding-top: 16px;
}
.cf-form-actions--confirm {
  gap: 24px;
  align-items: center;
}

/* ── フォームボタン ── */
.cf-btn-primary {
  font-family: var(--mincho-jp);
  font-size: 15px;
  font-weight: 500;
  background: var(--fg);
  color: var(--bg);
  padding: 20px 48px;
  letter-spacing: 0.04em;
  position: relative;
  overflow: hidden;
  display: inline-flex;
  align-items: center;
  gap: 14px;
  border: 1px solid var(--fg);
  cursor: none;
  transition: color 0.3s;
}
.cf-btn-primary span { position: relative; z-index: 2; }
.cf-btn-primary::before {
  content: "";
  position: absolute; inset: 0;
  background: var(--bg);
  transform: translateY(101%);
  transition: transform 0.6s cubic-bezier(0.7,0,0.2,1);
  z-index: 1;
}
.cf-btn-primary:hover { color: var(--fg); }
.cf-btn-primary:hover::before { transform: translateY(0); }
.cf-btn-primary .arrow { transition: transform 0.4s; }
.cf-btn-primary:hover .arrow { transform: translateX(8px); }
.cf-btn-primary:disabled {
  opacity: 0.5;
  pointer-events: none;
}

.cf-btn-secondary {
  font-family: var(--mincho-jp);
  font-size: 15px;
  font-weight: 500;
  background: transparent;
  color: var(--fg);
  padding: 20px 48px;
  letter-spacing: 0.04em;
  position: relative;
  overflow: hidden;
  display: inline-flex;
  align-items: center;
  gap: 14px;
  border: 1px solid var(--fg);
  cursor: none;
  transition: color 0.3s;
}
.cf-btn-secondary span { position: relative; z-index: 2; }
.cf-btn-secondary::before {
  content: "";
  position: absolute; inset: 0;
  background: var(--fg);
  transform: translateY(101%);
  transition: transform 0.6s cubic-bezier(0.7,0,0.2,1);
  z-index: 1;
}
.cf-btn-secondary:hover { color: var(--bg); }
.cf-btn-secondary:hover::before { transform: translateY(0); }

/* ── 確認画面 ── */
.cf-confirm-intro {
  font-family: var(--sans-jp);
  font-size: 14px;
  color: var(--fg-mid);
  margin-bottom: 48px;
}
.cf-confirm-table {
  border-top: 1px solid var(--line);
  margin-bottom: 64px;
}
.cf-confirm-row {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 40px;
  border-bottom: 1px solid var(--line);
  padding: 28px 0;
  align-items: start;
}
.cf-confirm-row dt {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: lowercase;
  color: var(--fg-mid);
  padding-top: 2px;
}
.cf-confirm-row dd {
  font-family: var(--sans-jp);
  font-size: 15px;
  font-weight: 300;
  color: var(--fg);
  line-height: 1.8;
  white-space: pre-wrap;
  word-break: break-word;
}

/* ── 完了画面 ── */
.cf-complete { padding: 80px 0; max-width: 640px; }
.cf-complete-check {
  font-family: var(--serif-en);
  font-size: 48px;
  font-weight: 300;
  color: var(--fg-soft);
  margin-bottom: 40px;
  display: block;
}
.cf-complete-headline {
  font-family: var(--mincho-jp);
  font-weight: 500;
  font-size: clamp(28px, 4vw, 48px);
  line-height: 1.5;
  letter-spacing: -0.01em;
  margin-bottom: 32px;
}
.cf-complete-body p {
  font-size: 15px;
  line-height: 2;
  color: var(--fg-mid);
  margin-bottom: 16px;
}
.cf-complete-body strong { color: var(--fg); font-weight: 500; }
.cf-complete .method-cta { margin-top: 48px; }

/* ── レスポンシブ ── */
@media (max-width: 860px) {
  .cf-fields { grid-template-columns: 1fr; gap: 36px; }
  .cf-confirm-row { grid-template-columns: 120px 1fr; gap: 20px; }
  .cf-line-banner { flex-direction: column; align-items: flex-start; gap: 20px; }
  .cf-form-actions--confirm { flex-direction: column-reverse; align-items: stretch; }
  .cf-form-actions--confirm .cf-btn-primary,
  .cf-form-actions--confirm .cf-btn-secondary { justify-content: center; }
}

@media (max-width: 720px) {
  .cf-btn-primary,
  .cf-btn-secondary { padding: 18px 32px; font-size: 14px; }
}