/*
=====================================================
✅ Material Design 기반 Form + Button 공통 스타일 (v2.2)
이 파일은 테마 CSS 변수(:root) 기반으로 작동합니다.
다크모드뿐만 아니라 다양한 테마(`theme-*.css`)와 연동 가능하며,
컬러만 교체하여 전체 UI 스타일은 유지하고 시각 테마만 전환할 수 있습니다.

✅ 사용 예시:
<link rel="stylesheet" href="/css/material-form_color-default.css">
<link rel="stylesheet" href="/css/material-form_control.css">

✅ 다크모드는 자동 적용됨 (`material-form_color-dark.css`)
✅ 기본/블루/그린/레드 등 다양한 테마와 조합 가능
=====================================================
*/


/* =============================
🔹 [1] 기본 공통 필드 구조 (Filled 기본형)
============================= */

.form-field {
    width: 100%;
    margin-left: auto;
    margin-right: auto;
    min-width: 280px;
    position: relative;
    margin-bottom: 24px;
    font-family: 'Roboto', sans-serif;
    box-sizing: border-box;
}

.form-field__input {
    display: block;
    width: 100%;
    font-size: 16px;
    padding: 20px 12px 6px;
    border: none;
    border-bottom: 2px solid var(--color-outline);
    background-color: var(--color-bg-input);
    border-radius: 4px 4px 0 0;
    outline: none;
    transition: all 0.2s;
    resize: vertical;
    position: relative;
    z-index: 1;
    box-sizing: border-box;
}

.form-field__label {
    position: absolute;
    left: 12px;
    top: 20px;
    font-size: 16px;
    color: #777;
    background-color: var(--color-bg-input);
    padding: 0 4px;
    transition: all 0.2s ease;
    pointer-events: none;
    line-height: 1;
    z-index: 2;
}

.form-field__helper {
    font-size: 12px;
    color: var(--color-helper);
    margin-top: 4px;
    display: block;
}

.form-field__helper.is-hidden {
    display: none;
}

/* 상태: 포커스 및 입력값 있을 때 라벨 이동 */
.form-field.is-focused .form-field__input {
    border-bottom: 2px solid var(--color-primary);
}
.form-field.is-focused .form-field__label,
.form-field.is-filled .form-field__label {
    top: -10px;
    left: 8px;
    font-size: 12px;
    color: var(--color-primary);
    background-color: var(--color-bg-input);
    padding: 0 4px;
    line-height: 1;
    z-index: 3;
}

/* 상태: 에러 */
.form-field.is-error .form-field__input {
    border-bottom: 2px solid var(--color-error);
    background-color: #fff0f0;
}
.form-field.is-error .form-field__label,
.form-field.is-error .form-field__helper {
    color: var(--color-error);
}

/* 상태: 비활성 */
.form-field__input:disabled {
    background-color: var(--color-disabled-bg);
    color: var(--color-disabled-text);
    border-bottom: 2px dashed var(--color-outline);
    cursor: not-allowed;
}

/* 상태: 읽기 전용 */
.form-field__input[readonly] {
    background-color: var(--color-readonly-bg);
    color: #555;
    border-bottom: 1px dotted var(--color-outline);
}


/* =============================
🔸 [2] 라벨 Static 적용 스타일
============================= */
.form-field__label.is-static {
    font-size: 16px;
    font-weight: 500;
    color: #333;
    margin-bottom: 6px;
    padding: 0;
    display: block;
    position: static;
    background: none;
}


/* =============================
🔹 [3] 체크박스 및 그룹 스타일
============================= */

legend {
    margin-left: -10px;
}

.form-check {
    display: flex;
    align-items: center;
    margin: 4px 0;
}

.form-check input {
    margin-right: 8px;
}

.form-check__label {
    font-size: 14px;
    color: #333;
}

.form-field-group {
    margin-bottom: 24px;
    border: none;
    padding: 0 8px;
    box-sizing: border-box;
}


/* =============================
🔸 [4] Outlined 스타일
============================= */
.form-field--outlined .form-field__input {
    background-color: #ffffff;
    border: 1px solid var(--color-outline);
    border-radius: 4px;
}

.form-field--outlined.is-focused .form-field__input {
    border: 2px solid var(--color-primary);
}

.form-field--outlined .form-field__label {
    background-color: #ffffff;
    top: 20px;
    left: 12px;
}

.form-field--outlined.is-focused .form-field__label,
.form-field--outlined.is-filled .form-field__label {
    top: -8px;
    left: 8px;
    font-size: 12px;
    color: var(--color-primary);
    z-index: 3;
    padding: 0 4px;
}


/* =============================
🔸 [5] Standard 스타일
============================= */
.form-field--standard .form-field__input {
    border-radius: 0;
    border: none;
    border-bottom: 1px solid var(--color-outline);
    background-color: transparent;
}

.form-field--standard.is-focused .form-field__input {
    border-bottom: 2px solid var(--color-primary);
}

.form-field--standard .form-field__label {
    background-color: #ffffff;
    top: 20px;
    left: 12px;
}

.form-field--standard.is-focused .form-field__label,
.form-field--standard.is-filled .form-field__label {
    top: -8px;
    left: 8px;
    font-size: 12px;
    color: var(--color-primary);
    z-index: 3;
    padding: 0 4px;
}


/* =============================
🔹 [6] 반응형 대응 (모바일)
============================= */
@media (max-width: 767px) {
    .form-field {
        padding-left: 6px;
        padding-right: 6px;
    }

    .form-field__input {
        font-size: 14px;
        padding: 14px 8px 6px;
    }

    .form-field__label {
        font-size: 13px;
    }

    .form-field__helper {
        font-size: 10px;
    }
}