/*
 * viewer.css — E-book 뷰어 (v2 간소화 모바일 특화) — CDN 서버리스 버전
 */

/* ===== 테마 변수 (cdy212.github.io 기준) ===== */
:root {
    --color-primary: #004080;
    --color-primary-light: #0059b3;
    --color-primary-dark: #002a5c;
    --bg-main: #f3f4f6;
    --bg-toolbar: #ffffff;
    --text-main: #1f2937;
    --text-muted: #6b7280;
    --border-color: #e5e7eb;
}

/* ===== 리셋 ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
    height: 100%;
    font-family: 'Noto Sans KR', sans-serif;
    background: var(--bg-main);
    color: var(--text-main);
    overscroll-behavior: none;
}

body {
    display: flex;
    flex-direction: column;
    height: 100vh;
    overflow: hidden;
}

/* ===== 툴바 ===== */
#toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 52px;
    padding: 0 10px;
    background: var(--bg-toolbar);
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
    z-index: 20;
    gap: 6px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

.toolbar-left { display: flex; align-items: center; gap: 6px; flex-shrink: 0; }
.toolbar-center { display: flex; align-items: center; gap: 5px; flex-shrink: 0; }
.toolbar-right { display: flex; align-items: center; gap: 6px; flex-shrink: 0; }

#book-title {
    font-size: 0.9rem;
    font-weight: 700;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 120px;
    color: var(--text-main);
}

/* Jump to Page */
#jump-form { display: flex; align-items: center; }
#jump-input {
    width: 46px;
    background: #f8fafc;
    color: var(--text-main);
    border: 1px solid var(--border-color);
    border-radius: 5px;
    padding: 4px 5px;
    font-size: 0.82rem;
    text-align: center;
    outline: none;
    -moz-appearance: textfield;
}
#jump-input::-webkit-inner-spin-button,
#jump-input::-webkit-outer-spin-button { -webkit-appearance: none; appearance: none; }
#jump-input:focus { border-color: var(--color-primary); box-shadow: 0 0 0 2px rgba(0,64,128,0.1); }

.sep, #page-count { font-size: 0.82rem; color: var(--text-muted); font-weight: 500;}

/* 툴바 버튼 공통 */
#toolbar button {
    background: transparent;
    color: var(--text-main);
    border: 1px solid transparent;
    border-radius: 6px;
    padding: 6px 10px;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.15s;
    flex-shrink: 0;
}
#toolbar button:hover  { background: #f1f5f9; color: var(--color-primary-light); }
#toolbar button.active { background: var(--color-primary); color: #fff; }
#btn-back       { font-size: 1.1rem; padding: 5px 6px; color: var(--color-primary); }
#btn-back:hover { background: #f1f5f9; color: var(--color-primary-dark); }
#btn-menu       { font-size: 1.2rem; }
#btn-search-quick { font-size: 1.1rem; }


/* ===== Progress Bar ===== */
#progress-container { height: 3px; background: #e5e7eb; flex-shrink: 0; transition: opacity 0.8s ease; }
#progress-bar { height: 100%; width: 0%; background: linear-gradient(90deg, var(--color-primary-light), var(--color-primary)); transition: width 0.3s ease; }

/* ===== 로딩 오버레이 ===== */
#loading-overlay {
    position: absolute; inset: 0;
    background: var(--bg-main); z-index: 50;
    display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 16px;
    transition: opacity 0.4s ease;
}
.spinner {
    width: 48px; height: 48px;
    border: 3px solid #e5e7eb; border-top-color: var(--color-primary);
    border-radius: 50%; animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
#loading-msg { color: var(--text-muted); font-size: 0.9rem; font-weight: 500;}

/* ===== 토스트 ===== */
.toast {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    padding: 10px 20px;
    border-radius: 20px;
    font-size: 0.875rem;
    z-index: 100;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    background: #ffffff;
    color: var(--text-main);
    border: 1px solid var(--border-color);
    transition: opacity 0.3s;
    text-align: center;
    line-height: 1.5;
}
.toast.hidden { display: none; }

/* 공유 토스트 */
#share-toast { background: var(--color-primary); color: #fff; border:none;}

/* ===== 뷰어 메인 ===== */
#viewer-main {
    flex: 1;
    display: flex; align-items: center; justify-content: center;
    overflow: hidden; position: relative;
    user-select: none; -webkit-user-select: none;
    touch-action: pan-y;
}

/* 줌 래퍼 */
#zoom-wrapper { transition: transform 0.15s ease; transform-origin: center center; }

/* 플립북 */
#flipbook-container { filter: drop-shadow(0 10px 20px rgba(0,0,0,0.15)); }
.stf__wrapper { border-radius: 2px; overflow: hidden; }
#flipbook-container canvas { background: #fff; display: block; }
.page-wrapper { width: 100%; height: 100%; background: #fff; }

/* 부유 화살표 */
#btn-prev-float, #btn-next-float {
    position: absolute; top: 50%; transform: translateY(-50%);
    background: rgba(255,255,255,0.8); color: var(--color-primary); 
    border: 1px solid var(--border-color);
    border-radius: 10px; width: 38px; height: 68px;
    font-size: 1.7rem; cursor: pointer; z-index: 10;
    display: flex; align-items: center; justify-content: center;
    transition: all 0.2s; box-shadow: 0 4px 6px rgba(0,0,0,0.05);
}
#btn-prev-float { left: 10px; }
#btn-next-float { right: 10px; }
#btn-prev-float:hover, #btn-next-float:hover { background: #fff; color: var(--color-primary-dark); transform: translateY(-50%) scale(1.05); }

/* ===== 사이드 패널 ===== */
#side-panel {
    position: fixed; top: 55px; right: 0; bottom: 0;
    width: 280px; background: #ffffff;
    border-left: 1px solid var(--border-color); z-index: 30;
    display: flex; flex-direction: column;
    transform: translateX(100%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: -4px 0 20px rgba(0,0,0,0.08);
}
#side-panel.open { transform: translateX(0); }

/* 탭 헤더 */
.panel-tabs {
    display: flex; align-items: center;
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0; padding: 4px 6px 0; overflow-x: auto;
    background: #f8fafc;
}
.tab-btn {
    background: none; border: none; color: var(--text-muted);
    font-size: 0.8rem; font-weight: 500; padding: 10px 12px; cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: color 0.15s, border-color 0.15s;
    white-space: nowrap; flex-shrink: 0; flex: 1;
}
.tab-btn:hover  { color: var(--color-primary); }
.tab-btn.active { color: var(--color-primary); border-bottom-color: var(--color-primary); }

#btn-panel-close {
    background: none; border: none; color: var(--text-muted);
    cursor: pointer; font-size: 1rem; padding: 6px;
    border-radius: 4px; margin-left: auto; flex-shrink: 0;
}
#btn-panel-close:hover { color: var(--text-main); background: #f1f5f9;}

/* 탭 컨텐츠 */
.tab-content { display: none; flex: 1; overflow-y: auto; flex-direction: column; background: #fff;}
.tab-content.active { display: flex; flex-direction: column; }
.panel-empty { color: var(--text-muted); font-size: 0.85rem; text-align: center; padding: 30px 16px; list-style: none; }

/* 목차 */
#toc-list { list-style: none; padding: 6px 0; overflow-y: auto; }
.toc-item {
    padding: 10px 16px; font-size: 0.85rem; color: var(--text-main);
    cursor: pointer; border-bottom: 1px solid #f1f5f9;
    transition: background 0.14s; white-space: nowrap;
    overflow: hidden; text-overflow: ellipsis;
}
.toc-item:hover { background: #f8fafc; color: var(--color-primary); font-weight: 500;}

/* 북마크 */
.panel-action-row { padding: 12px 10px 4px; flex-shrink: 0; }
.panel-action-row button {
    width: 100%; background: var(--color-primary); color: #fff;
    border: none; border-radius: 6px; padding: 10px;
    font-size: 0.85rem; font-weight: 500; cursor: pointer; transition: background 0.15s;
    box-shadow: 0 2px 4px rgba(0,64,128,0.2);
}
.panel-action-row button:hover { background: var(--color-primary-dark); }
#bookmark-list { list-style: none; padding: 6px 8px; overflow-y: auto; }
.bookmark-item {
    display: flex; align-items: center; justify-content: space-between;
    padding: 10px 12px; border-radius: 6px; transition: background 0.14s;
    border: 1px solid #f1f5f9; margin-bottom: 4px;
}
.bookmark-item:hover { background: #f8fafc; border-color: #e2e8f0; }
.bookmark-item > span { font-size: 0.85rem; font-weight: 500; color: var(--text-main); cursor: pointer; }
.bookmark-item > button {
    background: none; border: none; color: #9ca3af; cursor: pointer;
    font-size: 1rem; padding: 2px 6px; border-radius: 4px; transition: all 0.2s;
}
.bookmark-item > button:hover { color: #ef4444; background: #fee2e2; }

/* 검색 */
.search-row { display: flex; gap: 6px; padding: 12px 10px 8px; flex-shrink: 0; }
#search-input {
    flex: 1; background: #f8fafc; color: var(--text-main);
    border: 1px solid var(--border-color); border-radius: 6px;
    padding: 8px 12px; font-size: 0.85rem; outline: none;
}
#search-input:focus { border-color: var(--color-primary); background: #fff;}
#btn-search {
    background: var(--color-primary); color: #fff; border: none;
    border-radius: 6px; padding: 8px 14px;
    font-size: 0.85rem; font-weight: 500; cursor: pointer;
    box-shadow: 0 2px 4px rgba(0,64,128,0.2);
}
#btn-search:hover { background: var(--color-primary-dark); }
#search-results { flex: 1; overflow-y: auto; padding: 0 10px 12px; }
.search-count { font-size: 0.8rem; font-weight: 600; color: var(--color-primary); padding: 8px 4px; }
.search-result-item { padding: 10px 12px; border-radius: 6px; cursor: pointer; margin-bottom: 6px; transition: background 0.14s; border: 1px solid #f1f5f9; background:#fff;}
.search-result-item:hover { background: #f8fafc; border-color: #e2e8f0; }
.search-result-item strong { font-size: 0.85rem; color: var(--color-primary); display: block; margin-bottom: 4px; font-weight: 600;}
.search-result-item p { font-size: 0.8rem; color: var(--text-muted); line-height: 1.5; word-break: break-all; }

/* ===== 하단 기타 기능 섹션 ===== */

.panel-mobile-actions {
    border-top: 1px solid var(--border-color);
    background: #f8fafc;
    flex-shrink: 0;
    padding: 12px;
}

/* 신규: 메뉴 안으로 들어온 줌 버튼 행 */
.panel-action-zoom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 4px;
    margin-bottom: 12px;
}
.panel-action-zoom button {
    background: transparent;
    color: var(--text-main);
    border: none;
    padding: 8px 12px;
    font-size: 0.9rem;
    cursor: pointer;
    border-radius: 6px;
    font-weight: 500;
}
.panel-action-zoom button:hover { background: #f1f5f9; color: var(--color-primary); }
#m-zoom-label {
    font-size: 0.85rem;
    color: var(--color-primary);
    font-weight: 700;
}

.panel-section-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 600;
    margin-bottom: 8px;
    padding-left: 4px;
    letter-spacing: 0.03em;
}

.panel-mobile-btns {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

.panel-mobile-btns button {
    background: #fff;
    color: var(--text-main);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 10px 8px;
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s;
    text-align: center;
}
.panel-mobile-btns button:hover  { background: #f8fafc; border-color: #cbd5e1; color: var(--color-primary); }
.panel-mobile-btns button.active { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }

/* 자동넘김 속도 선택 */
#m-auto-options {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 6px;
    margin-top: 8px;
}
#m-auto-options.hidden { display: none; }
.m-auto-opt {
    background: #fff;
    border: 1px solid var(--border-color);
    color: var(--text-main);
    border-radius: 6px;
    padding: 8px 4px;
    font-size: 0.75rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s;
}
.m-auto-opt:hover { background: #f8fafc; color: var(--color-primary); border-color: var(--color-primary-light); }


/* ===== 반응형: 모바일 (< 768px) ===== */
@media (max-width: 767px) {
    .hidden-mobile { display: none !important; }
    
    /* 툴바 조정 */
    #book-title    { max-width: 90px; font-size: 0.75rem; }
    #toolbar button { padding: 4px 8px; font-size: 0.82rem; }
    #jump-input    { width: 40px; font-size: 0.78rem; }

    /* 부유 화살표 소형화 */
    #btn-prev-float, #btn-next-float { width: 28px; height: 50px; font-size: 1.2rem; }

    /* 사이드 패널 전체 너비 */
    #side-panel { width: 100%; top: 55px; border-left: none; border-top: 1px solid #374151; }
}

/* ===== 반응형: PC ===== */
@media (min-width: 768px) {
    #flipbook-container { max-width: 1200px; }
    
    .hidden-mobile { display: flex; }
    
    #right-bookmark-tabs {
        position: fixed;
        right: 0;
        top: 100px;
        display: flex;
        flex-direction: column;
        gap: 8px;
        z-index: 15;
        max-height: calc(100vh - 120px);
        overflow-y: auto;
        align-items: flex-end;
    }
    
    /* 스크롤바 디자인 최소화 */
    #right-bookmark-tabs::-webkit-scrollbar { width: 4px; }
    #right-bookmark-tabs::-webkit-scrollbar-thumb { background: rgba(0,0,0,0.1); border-radius: 4px; }

    .side-bookmark-btn {
        background: var(--color-primary); 
        color: #fff;
        border: none;
        padding: 12px 14px 12px 18px; 
        font-size: 0.85rem;
        font-weight: 600;
        cursor: pointer;
        border-radius: 12px 0 0 12px;
        box-shadow: -2px 2px 8px rgba(0,64,128,0.2);
        transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
        max-width: 160px;
        text-align: right;
        word-break: keep-all; 
        opacity: 0.9;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }

    .side-bookmark-btn:hover {
        background: var(--color-primary-dark);
        transform: translateX(-6px);
        opacity: 1;
        box-shadow: -4px 4px 12px rgba(0,64,128,0.3);
    }
}

/* ===== 전체화면 ===== */
:fullscreen body, :-webkit-full-screen body { height: 100vh; }

/* ===== 인쇄 ===== */
@media print {
    #toolbar, #progress-container, #loading-overlay,
    #btn-prev-float, #btn-next-float, #side-panel,
    #share-toast { display: none !important; }
    #viewer-main { height: auto; overflow: visible; }
    #flipbook-container canvas { page-break-after: always; }
}