/**
 * @task S5U2
 * @description 반응형 디자인 CSS - 모바일 UX 최적화
 * @author frontend-developer (AI Agent)
 * @date 2025-12-23
 * @reference prototype_responsive_final.html
 */

/* ============================================
   기본 반응형 설정
   ============================================ */

html, body {
    overflow-x: hidden;
    max-width: 100vw;
}

* {
    box-sizing: border-box;
}

/* ============================================
   모바일 메뉴 버튼 (기본 숨김)
   ============================================ */

.mobile-menu-btn {
    display: none;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: transparent;
    border: none;
    border-radius: 8px;
    font-size: 20px;
    color: #374151;
    cursor: pointer;
    transition: background 0.2s ease;
}

.mobile-menu-btn:hover {
    background: rgba(0, 0, 0, 0.05);
}

/* ============================================
   사이드바 닫기 버튼 (기본 숨김)
   ============================================ */

.sidebar-close-btn {
    display: none;
    position: absolute;
    top: 12px;
    right: 12px;
    width: 36px;
    height: 36px;
    align-items: center;
    justify-content: center;
    background: #f3f4f6;
    border: none;
    border-radius: 50%;
    font-size: 18px;
    color: #6b7280;
    cursor: pointer;
    z-index: 10;
}

.sidebar-close-btn:hover {
    background: #e5e7eb;
    color: #374151;
}

/* ============================================
   오버레이 (사이드바 열릴 때 배경)
   ============================================ */

.sidebar-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.sidebar-overlay.active {
    display: block;
    opacity: 1;
}

/* ============================================
   모바일 전용 배너 (데스크톱 권장 안내)
   ============================================ */

.mobile-notice {
    display: none;
    background: linear-gradient(135deg, #FEF3C7, #FDE68A);
    color: #92400E;
    padding: 12px 16px;
    text-align: center;
    font-size: 14px;
    font-weight: 500;
    border-bottom: 1px solid #F59E0B;
    position: sticky;
    top: 0;
    z-index: 999;
}

.mobile-notice-icon {
    margin-right: 8px;
}

.mobile-notice-link {
    color: #B45309;
    text-decoration: underline;
}

/* ============================================
   태블릿 가로 (769px ~ 1023px)
   - 오른쪽 사이드바: 슬라이드 패널
   ============================================ */

@media (max-width: 1023px) and (min-width: 769px) {
    /* 2열 그리드 */
    .layout-container {
        grid-template-columns: 220px 1fr !important;
    }

    /* 왼쪽 사이드바 축소 */
    .left-sidebar,
    .sidebar.left {
        width: 220px !important;
        padding: 12px 10px !important;
    }

    /* 오른쪽 사이드바 → 슬라이드 패널 */
    .right-sidebar,
    .sidebar.right {
        position: fixed !important;
        right: -320px !important;
        top: 0;
        bottom: 0;
        width: 300px !important;
        z-index: 1001;
        background: #f8f9fa !important;
        box-shadow: -4px 0 20px rgba(0, 0, 0, 0.15);
        transition: right 0.3s ease;
        overflow-y: auto;
        padding-top: 20px !important;
    }

    .right-sidebar.open,
    .sidebar.right.open {
        right: 0 !important;
    }

    .right-sidebar .sidebar-close-btn {
        display: flex;
    }

    /* 헤더 조정 */
    .header-inner {
        padding: 0 16px !important;
    }

    .header-tagline {
        font-size: 12px !important;
    }

    .logo h1 {
        font-size: 20px !important;
    }

    /* 폰트 크기 조정 */
    h1 { font-size: 1.75rem !important; }
    h2 { font-size: 1.5rem !important; }
    h3 { font-size: 1.25rem !important; }
}

/* ============================================
   모바일 (768px 이하)
   - 양쪽 사이드바: 슬라이드 패널
   - 햄버거 메뉴 표시
   ============================================ */

@media (max-width: 768px) {
    /* 모바일 배너 표시 */
    .mobile-notice {
        display: block !important;
    }

    /* 모바일 메뉴 버튼 표시 */
    .mobile-menu-btn {
        display: flex !important;
    }

    /* 1열 레이아웃 */
    .layout-container {
        display: grid !important;
        grid-template-columns: 1fr !important;
        grid-template-rows: 1fr !important;
    }

    /* 헤더 조정 */
    .header-inner {
        height: 60px !important;
        padding: 0 12px !important;
    }

    .header-center {
        display: none !important;
    }

    .header-right {
        display: none !important;
    }

    .logo h1 {
        font-size: 20px !important;
    }

    /* 왼쪽 사이드바 → 슬라이드 패널 */
    .left-sidebar,
    .sidebar.left,
    .nav-sidebar {
        position: fixed !important;
        left: -320px !important;
        top: 0;
        bottom: 0;
        width: 300px !important;
        z-index: 1001;
        background: #f8f9fa !important;
        box-shadow: 4px 0 20px rgba(0, 0, 0, 0.15);
        transition: left 0.3s ease;
        overflow-y: auto;
        padding-top: 60px !important;
        -webkit-overflow-scrolling: touch;
        grid-column: unset !important;
        grid-row: unset !important;
    }

    .left-sidebar.open,
    .sidebar.left.open,
    .nav-sidebar.open {
        left: 0 !important;
    }

    .left-sidebar .sidebar-close-btn {
        display: flex;
        top: 16px;
    }

    /* 오른쪽 사이드바 → 슬라이드 패널 */
    .right-sidebar,
    .sidebar.right {
        position: fixed !important;
        right: -320px !important;
        top: 0;
        bottom: 0;
        width: 300px !important;
        z-index: 1001;
        background: #f8f9fa !important;
        box-shadow: -4px 0 20px rgba(0, 0, 0, 0.15);
        transition: right 0.3s ease;
        overflow-y: auto;
        padding-top: 60px !important;
        -webkit-overflow-scrolling: touch;
        grid-column: unset !important;
        grid-row: unset !important;
    }

    .right-sidebar.open,
    .sidebar.right.open {
        right: 0 !important;
    }

    .right-sidebar .sidebar-close-btn {
        display: flex;
        top: 16px;
    }

    /* 메인 콘텐츠 전체 너비 */
    .main-content,
    .content-area,
    .main-area,
    .center-workspace,
    .container {
        margin-left: 0 !important;
        width: 100% !important;
        max-width: 100% !important;
        padding: 12px !important;
    }

    /* 그리드 1열 레이아웃 */
    .grid-container,
    .grid-3col,
    .dashboard-grid,
    .card-grid {
        grid-template-columns: 1fr !important;
        gap: 12px !important;
    }

    /* 테이블 스크롤 가능 */
    .table-container,
    table {
        display: block;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    /* 카드 전체 너비 */
    .card,
    .panel,
    .widget {
        width: 100% !important;
        margin: 8px 0 !important;
    }

    /* 버튼 터치 타겟 확대 */
    button,
    .btn,
    input[type="submit"],
    input[type="button"],
    a.button,
    .action-btn {
        min-height: 44px !important;
        padding: 12px 16px !important;
        font-size: 16px !important;
    }

    /* 입력 필드 터치 타겟 */
    input[type="text"],
    input[type="email"],
    input[type="password"],
    input[type="number"],
    input[type="tel"],
    select,
    textarea {
        min-height: 44px !important;
        padding: 10px 12px !important;
        font-size: 16px !important;
    }

    /* 폰트 크기 - 가독성 */
    body {
        font-size: 16px !important;
        line-height: 1.5 !important;
    }

    p, span, li, td, th {
        font-size: 14px !important;
    }

    h1 { font-size: 1.5rem !important; }
    h2 { font-size: 1.25rem !important; }
    h3 { font-size: 1.125rem !important; }

    /* 푸터 조정 */
    .footer,
    footer {
        padding: 16px 12px !important;
    }

    .footer-inner {
        flex-direction: column !important;
        gap: 12px !important;
        text-align: center;
    }

    /* Flex 아이템 스택 */
    .flex-row,
    .d-flex {
        flex-direction: column !important;
    }

    /* 모달 전체 화면 */
    .modal,
    .dialog {
        width: 100% !important;
        max-width: 100% !important;
        margin: 0 !important;
        border-radius: 0 !important;
    }

    /* 네비게이션 */
    .nav-menu,
    .navigation {
        flex-direction: column !important;
    }

    .nav-item {
        width: 100% !important;
        padding: 12px !important;
        border-bottom: 1px solid #eee;
    }

    /* 워크스페이스 */
    .workspace-header {
        padding: 12px 16px !important;
    }

    .workspace-title {
        font-size: 18px !important;
    }

    .workspace-actions {
        grid-template-columns: repeat(2, 1fr) !important;
        gap: 8px !important;
    }
}

/* ============================================
   소형 모바일 (480px 이하)
   ============================================ */

@media (max-width: 480px) {
    /* 헤더 더 작게 */
    .header-inner {
        padding: 0 10px !important;
        height: 56px !important;
    }

    .logo {
        gap: 8px !important;
    }

    .logo h1 {
        font-size: 18px !important;
    }

    .mobile-menu-btn {
        width: 40px !important;
        height: 40px !important;
        font-size: 18px !important;
    }

    /* 사이드바 더 좁게 */
    .left-sidebar,
    .right-sidebar,
    .sidebar.left,
    .sidebar.right {
        width: 280px !important;
    }

    .left-sidebar,
    .sidebar.left {
        left: -290px !important;
    }

    .right-sidebar,
    .sidebar.right {
        right: -290px !important;
    }

    /* 사이드바 내부 요소 */
    .sidebar-title,
    .sidebar-section h3 {
        font-size: 13px !important;
    }

    .process-major,
    .process-prep,
    .process-special {
        padding: 10px 12px !important;
        min-height: 44px !important;
    }

    .process-name,
    .process-prep-name,
    .process-special-name {
        font-size: 12px !important;
    }

    /* 메인 콘텐츠 */
    .main-content,
    .content-area {
        padding: 8px !important;
    }

    /* 워크스페이스 */
    .workspace-header {
        padding: 10px !important;
    }

    .workspace-title {
        font-size: 16px !important;
    }

    .workspace-actions {
        grid-template-columns: repeat(2, 1fr) !important;
        gap: 6px !important;
    }

    .action-btn {
        padding: 8px 6px !important;
        font-size: 11px !important;
        min-height: 44px !important;
    }

    .workspace-content {
        padding: 8px !important;
    }

    .text-editor {
        min-height: 150px !important;
        padding: 10px !important;
        font-size: 13px !important;
    }

    /* 푸터 */
    .footer-inner {
        padding: 10px !important;
    }

    .footer-btn {
        padding: 10px 12px !important;
        font-size: 12px !important;
        min-height: 44px !important;
    }

    /* 버튼 전체 너비 */
    button:not(.mobile-menu-btn):not(.sidebar-close-btn),
    .btn {
        width: 100% !important;
    }

    /* 폼 그룹 */
    .form-group {
        margin-bottom: 16px !important;
    }

    label {
        display: block !important;
        margin-bottom: 4px !important;
    }
}

/* ============================================
   데스크톱 (769px 이상) - 모바일 요소 숨김
   ============================================ */

@media (min-width: 769px) {
    .mobile-notice {
        display: none !important;
    }

    .mobile-menu-btn {
        display: none !important;
    }

    .sidebar-overlay {
        display: none !important;
    }
}

/* ============================================
   터치 디바이스 최적화
   ============================================ */

@media (hover: none) and (pointer: coarse) {
    /* 모든 인터랙티브 요소 최소 44px */
    .process-major,
    .process-small,
    .process-tiny,
    .process-prep,
    .process-special,
    .knowledge-major,
    .knowledge-medium,
    .knowledge-small,
    .quick-link-btn,
    .project-menu-item,
    .project-list-item,
    .nav-item,
    .menu-item {
        min-height: 44px !important;
        display: flex;
        align-items: center;
    }

    .action-btn,
    .header-btn,
    .footer-btn,
    .mobile-menu-btn,
    .sidebar-close-btn,
    .fab-btn {
        min-height: 44px !important;
    }

    /* 터치 스크롤 최적화 */
    .left-sidebar,
    .right-sidebar,
    .workspace-content,
    .scrollable {
        -webkit-overflow-scrolling: touch;
    }
}

/* ============================================
   텍스트 오버플로우 처리
   ============================================ */

.process-name,
.process-prep-name,
.process-special-name,
.knowledge-name,
.project-name,
.notice-title {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.workspace-title {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: 100%;
}

/* ============================================
   인쇄 스타일
   ============================================ */

@media print {
    .header,
    .footer,
    .left-sidebar,
    .right-sidebar,
    .fab-container,
    .sidebar-overlay,
    .mobile-menu-btn,
    .mobile-notice,
    .no-print {
        display: none !important;
    }

    .layout-container {
        display: block !important;
    }

    .center-workspace,
    .main-content {
        width: 100% !important;
        margin: 0 !important;
    }
}

/* ============================================
   접근성 개선
   ============================================ */

:focus {
    outline: 2px solid var(--primary, #10B981) !important;
    outline-offset: 2px;
}

@media (prefers-contrast: high) {
    * {
        border-color: #000 !important;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    .left-sidebar,
    .right-sidebar,
    .sidebar-overlay {
        animation: none !important;
        transition: none !important;
    }
}