@charset "utf-8";

/**
 * Atoms: フォーム要素コンポーネント
 * 入力フィールド、ラベル、バリデーションの統一スタイル
 */

/* === Form Group === */
.form-group {
  margin-bottom: var(--space_2xl);
}

.form-group:last-child {
  margin-bottom: 0;
}

/* === Labels === */
.form-label {
  display: block;
  font-family: var(--font_NotoSansJP);
  font-size: var(--font_size_small);
  font-weight: var(--font_weight_semibold);
  color: var(--col_font);
  margin-bottom: var(--space_sm);
}

.form-label--required::after {
  content: '*';
  color: var(--col_danger);
  margin-left: var(--space_xs);
}

/* === Base Input === */
.form-input {
  width: 100%;
  padding: var(--space_input_padding_y) var(--space_input_padding_x);
  border: 2px solid var(--border_light);
  border-radius: var(--radius_md);
  font-family: var(--font_NotoSansJP);
  font-size: var(--font_size_body);
  color: var(--col_font);
  background: var(--col_white);
  transition: all 0.3s ease;
}

.form-input:focus {
  outline: none;
  border-color: var(--col_primary);
  box-shadow: 0 0 0 3px rgba(225, 31, 31, 0.1);
}

.form-input:hover:not(:focus) {
  border-color: var(--border_medium);
}

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

/* === Input States === */
.form-input--success {
  border-color: var(--col_success);
}

.form-input--success:focus {
  border-color: var(--col_success);
  box-shadow: 0 0 0 3px rgba(40, 167, 69, 0.1);
}

.form-input--error {
  border-color: var(--col_danger);
}

.form-input--error:focus {
  border-color: var(--col_danger);
  box-shadow: 0 0 0 3px rgba(220, 53, 69, 0.1);
}

.form-input:disabled {
  background: var(--bg_gray);
  color: var(--col_gray_medium);
  cursor: not-allowed;
}

/* === Textarea === */
.form-textarea {
  resize: vertical;
  min-height: 120px;
  font-family: var(--font_NotoSansJP);
  line-height: var(--line_height_relaxed);
}

/* === Select === */
.form-select {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3e%3c/svg%3e");
  background-position: right var(--space_lg) center;
  background-repeat: no-repeat;
  background-size: 1.5em 1.5em;
  padding-right: var(--space_4xl);
  cursor: pointer;
}

.form-select::-ms-expand {
  display: none;
}

/* === Checkbox & Radio === */
.form-check {
  display: flex;
  align-items: flex-start;
  gap: var(--space_sm);
  margin-bottom: var(--space_lg);
}

.form-check-input {
  width: 20px;
  height: 20px;
  margin: 0;
  cursor: pointer;
  flex-shrink: 0;
  margin-top: 2px;
}

.form-check-input[type="checkbox"] {
  border-radius: var(--radius_sm);
}

.form-check-input[type="radio"] {
  border-radius: var(--radius_full);
}

.form-check-label {
  font-family: var(--font_NotoSansJP);
  font-size: var(--font_size_body);
  color: var(--col_font);
  cursor: pointer;
  line-height: var(--line_height_relaxed);
}

/* === File Input === */
.form-file {
  position: relative;
}

.form-file-input {
  position: absolute;
  opacity: 0;
  width: 100%;
  height: 100%;
  cursor: pointer;
}

.form-file-label {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space_sm);
  padding: var(--space_2xl);
  border: 2px dashed var(--border_medium);
  border-radius: var(--radius_lg);
  background: var(--bg_gray);
  color: var(--col_gray_medium);
  cursor: pointer;
  transition: all 0.3s ease;
}

.form-file:hover .form-file-label,
.form-file-input:focus + .form-file-label {
  border-color: var(--col_primary);
  background: rgba(225, 31, 31, 0.02);
  color: var(--col_primary);
}

/* === Help Text === */
.form-help {
  font-size: var(--font_size_small);
  color: var(--col_gray_medium);
  margin-top: var(--space_xs);
}

.form-help--error {
  color: var(--col_danger);
}

.form-help--success {
  color: var(--col_success);
}

/* === Form Grid === */
.form-grid {
  display: grid;
  gap: var(--space_2xl);
}

.form-grid--2col {
  grid-template-columns: repeat(2, 1fr);
}

.form-grid--3col {
  grid-template-columns: repeat(3, 1fr);
}

/* === Input Group === */
.input-group {
  display: flex;
  align-items: stretch;
}

.input-group .form-input {
  border-radius: 0;
}

.input-group .form-input:first-child {
  border-radius: var(--radius_md) 0 0 var(--radius_md);
}

.input-group .form-input:last-child {
  border-radius: 0 var(--radius_md) var(--radius_md) 0;
}

.input-group-text {
  display: flex;
  align-items: center;
  padding: var(--space_input_padding_y) var(--space_input_padding_x);
  background: var(--bg_gray);
  border: 2px solid var(--border_light);
  font-size: var(--font_size_body);
  color: var(--col_gray_medium);
}

/* === Responsive === */
@media only screen and (max-width: 767px) {
  .form-grid--2col,
  .form-grid--3col {
    grid-template-columns: 1fr;
  }
  
  .form-input,
  .form-select,
  .form-textarea {
    font-size: 16px; /* iOS zoom prevention */
  }
  
  .input-group {
    flex-direction: column;
  }
  
  .input-group .form-input,
  .input-group .input-group-text {
    border-radius: var(--radius_md);
    border-width: 2px;
  }
  
  .input-group .form-input:not(:last-child) {
    margin-bottom: var(--space_xs);
    border-bottom-width: 1px;
  }
}