:root {
    --bg: #FEF9E6;
    --text: #282828;
    --red-dark: #8B1F28;
    --red-main: #BC1F1F;
    --orange: #CC5419;
    --yellow: #D4A829;
    
    /* 폰트 분리 */
    --font-serif-en: "Playfair Display", serif; 
    --font-serif-kr: "Noto Serif KR", serif;
    --font-sans: "Pretendard", sans-serif;
}

* { -webkit-tap-highlight-color: transparent; outline: none; margin: 0; padding: 0; box-sizing: border-box; }

body {
    background-color: var(--bg);
    color: var(--text);
    font-family: var(--font-sans);
    overflow-x: hidden;
    width: 100vw;
}

/* 레이아웃 분할 */
.layout-grid {
    display: flex;
    width: 100%;
    min-height: 100vh;
}

.fixed-vertical-line {
    position: fixed;
    left: 40%;
    top: 0;
    width: 2px;
    height: 100vh;
    background-color: var(--red-main);
    z-index: 100;
    cursor: col-resize;
    transition: background-color 0.2s ease;
}

/* 드래그 히트 영역 확장 (좌우 6px씩 = 총 14px) */
.fixed-vertical-line::before {
    content: '';
    position: absolute;
    top: 0;
    left: -6px;
    width: 14px;
    height: 100%;
    cursor: col-resize;
}

.fixed-vertical-line:hover,
.fixed-vertical-line.dragging {
    background-color: var(--red-dark);
    width: 3px;
}

/* 왼쪽 패널 (고정) */
.left-panel {
    position: fixed;
    left: 0;
    top: 0;
    width: 40%;
    height: 100vh;
    padding: 8vh 4vw;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
}

.main-title {
    font-family: var(--font-serif-en); /* 영문 로고 */
    font-size: clamp(3rem, 5vw, 5rem);
    font-weight: 900;
    color: var(--text);
    margin-bottom: 2.5rem;
    letter-spacing: -0.02em;
}

/* 오른쪽 패널 (스크롤) */
.right-panel {
    margin-left: 40%;
    width: 60%;
    min-height: 100vh;
    padding: 8vh 6vw;
    position: relative; /* Intro 배치를 위해 */
}

/* ----------------------------------
   초기 소개 섹션 (Intro)
----------------------------------- */
#intro-section {
    display: block;
    margin-top: 2vh;
    animation: fadeIn 0.8s ease-out;
}

.intro-heading {
    font-family: var(--font-serif-en); /* 영문 제목 */
    font-size: clamp(2.5rem, 4vw, 3.5rem);
    color: var(--red-dark);
    margin-bottom: 1.5rem;
    font-weight: 700;
}

.intro-divider {
    width: 50px;
    height: 3px;
    background-color: var(--red-main);
    margin-bottom: 2rem;
}

.intro-desc {
    font-size: clamp(1rem, 1.2vw, 1.2rem);
    line-height: 1.8;
    color: var(--text);
    word-break: keep-all;
}

.intro-desc b {
    color: var(--red-dark);
    font-weight: 700;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes btnPress {
    0%   { transform: scale(1);    opacity: 1; }
    40%  { transform: scale(0.93); opacity: 0.7; }
    100% { transform: scale(1);    opacity: 1; }
}

/* ----------------------------------
   검색창 커스텀 
----------------------------------- */
.search-container {
    width: 100%;
    margin-bottom: 30px;
}

.gsc-control-cse, .gsc-search-box, .gsc-search-box-tools table {
    border: none !important;
    background: transparent !important;
    margin: 0 !important;
    padding: 0 !important;
    width: 100% !important;
}

.gsc-search-button, .gsc-clear-button { display: none !important; }
.gsc-input-box { border: none !important; background: transparent !important; width: 100% !important; }

input.gsc-input {
    border: 1.5px solid var(--red-dark) !important;
    border-radius: 30px !important;
    background-color: var(--bg) !important;
    background-image: none !important;
    color: var(--text) !important;
    font-size: 1rem !important;
    height: 48px !important;
    padding: 0 24px !important;
    box-shadow: none !important;
    font-family: var(--font-sans) !important;
    width: 100% !important;
    box-sizing: border-box !important;
}
input.gsc-input:focus { box-shadow: 0 0 0 3px rgba(139, 31, 40, 0.1) !important; }

/* ----------------------------------
   AI 요약창
----------------------------------- */
#ai-summary-container { width: 100%; margin-top: 10px; }

.ai-summary-box {
    border: 1.5px solid var(--red-dark);
    border-radius: 12px;
    position: relative;
    background-color: transparent;
    padding-top: 20px;
}

.summary-badge {
    position: absolute;
    top: 0; right: 20px;
    transform: translateY(-50%);
    background-color: var(--red-dark);
    color: var(--bg);
    padding: 6px 18px;
    border-radius: 30px;
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    border: none; cursor: pointer;
    font-family: var(--font-sans);
    transition: background-color 0.2s ease;
    z-index: 10;
}
.summary-badge:hover { background-color: var(--red-main); }
.summary-badge:not(:disabled):active { animation: btnPress 0.25s cubic-bezier(0.23, 1, 0.32, 1) forwards; }
.summary-badge:disabled { opacity: 0.7; cursor: wait; }

.icon-badge {
    background-color: var(--bg);
    color: var(--red-dark);
    border: 1.5px solid var(--red-dark);
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex; align-items: center; justify-content: center;
    width: 32px; height: 32px;
}
.icon-badge:hover { background-color: rgba(139, 31, 40, 0.1); }
.icon-badge:active { animation: btnPress 0.25s cubic-bezier(0.23, 1, 0.32, 1) forwards; }

/* AI 요약창 확대 기믹 추가 */
.ai-summary-box {
    transition: transform 0.4s cubic-bezier(0.23, 1, 0.32, 1),
                box-shadow 0.4s ease,
                border-color 0.3s ease;
}

.expanded-overlay {
    display: none;
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 199;
    animation: overlayFadeIn 0.3s ease forwards;
}

@keyframes overlayFadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes overlayFadeOut {
    from { opacity: 1; }
    to { opacity: 0; }
}

.ai-summary-box.expanded {
    position: fixed;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    width: min(900px, 85vw);
    height: min(80vh, 700px);
    z-index: 200;
    border-radius: 16px;
    border: 1.5px solid rgba(139, 31, 40, 0.3);
    background-color: var(--bg);
    padding: 0;
    margin: 0;
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.25),
                0 8px 20px rgba(139, 31, 40, 0.1);
    animation: expandIn 0.35s cubic-bezier(0.23, 1, 0.32, 1) forwards;
}

@keyframes expandIn {
    from {
        opacity: 0;
        transform: translate(-50%, -50%) scale(0.92);
    }
    to {
        opacity: 1;
        transform: translate(-50%, -50%) scale(1);
    }
}

.ai-summary-box.expanded .summary-actions {
    position: absolute;
    top: 20px; right: 24px;
    transform: none;
}

.ai-summary-box.expanded .ai-summary-scroll-area {
    max-height: calc(min(80vh, 700px) - 70px);
    padding: 60px 40px 30px 40px;
    mask-image: linear-gradient(to bottom, transparent 0%, black 3%, black 97%, transparent 100%);
    -webkit-mask-image: linear-gradient(to bottom, transparent 0%, black 3%, black 97%, transparent 100%);
}

.ai-summary-box.expanded #ai-summary-content {
    font-size: 1.05rem;
    line-height: 1.85;
}

.ai-summary-scroll-area {
    max-height: 40vh;
    overflow-y: auto;
    padding: 10px 24px 20px 24px;
    mask-image: linear-gradient(to bottom, transparent 0%, black 5%, black 95%, transparent 100%);
    -webkit-mask-image: linear-gradient(to bottom, transparent 0%, black 5%, black 95%, transparent 100%);
}
.ai-summary-scroll-area::-webkit-scrollbar { width: 6px; }
.ai-summary-scroll-area::-webkit-scrollbar-thumb { background-color: rgba(139, 31, 40, 0.3); border-radius: 10px; }

#ai-summary-content { font-size: 0.95rem; line-height: 1.7; color: var(--text); padding: 10px 0; }
#ai-summary-content p { margin-bottom: 10px; }
#ai-summary-content h1, #ai-summary-content h2, #ai-summary-content h3 { font-size: 1.1rem; color: var(--red-dark); margin: 15px 0 10px 0; }
#ai-summary-content ul { padding-left: 20px; margin: 10px 0; }
#ai-summary-content strong { color: var(--text); font-weight: 700; }

/* ----------------------------------
   검색 결과 커스텀
----------------------------------- */
.gsc-results-wrapper-overlay, 
.gsc-results-wrapper-visible, 
.gsc-resultsbox-visible, 
.gsc-webResult.gsc-result, 
.gsc-control-wrapper-cse {
    background: transparent !important; 
    background-color: transparent !important;
    box-shadow: none !important;
    padding: 0 !important;
}

.gsc-results .gsc-cursor-box { border: none !important; background: transparent !important; margin: 20px 0 !important; }

.gsc-webResult.gsc-result {
    border-top: none !important;
    border-bottom: none !important;
    border-left: none !important;
    border-right: none !important;
    border: 1.5px solid var(--red-dark) !important;
    border-radius: 12px !important;
    padding: 24px !important;
    margin-bottom: 20px !important;
    transition: transform 0.2s ease, background-color 0.2s ease;
}
.gsc-webResult.gsc-result:hover { background-color: rgba(139, 31, 40, 0.03) !important; transform: translateY(-2px); }

.gs-title { display: block !important; margin-bottom: 12px !important; }
.gs-title a, .gs-title a b {
    color: var(--text) !important; text-decoration: none !important;
    font-family: var(--font-serif-kr) !important; /* 한글 세리프체 적용 */
    font-size: 1.3rem !important; font-weight: 700 !important;
    word-break: break-word;
}
.gs-title a:hover { text-decoration: underline !important; }

.custom-favicon { width: 16px; height: 16px; margin-right: 8px; vertical-align: text-bottom; border-radius: 2px; }

.gs-snippet {
    display: block !important; font-family: var(--font-sans) !important; color: #444 !important;
    line-height: 1.6 !important; font-size: 0.95rem !important; word-break: break-word;
}
.gs-snippet b { color: var(--text) !important; font-weight: 700 !important; }

.gsc-thumbnail-inside, .gs-image-box, .gsc-url-top { display: none !important; } 

.gsc-cursor-page { color: var(--text) !important; background: transparent !important; border: 1px solid var(--text) !important; border-radius: 8px !important; padding: 4px 8px !important;}
.gsc-cursor-current-page { background: var(--text) !important; color: var(--bg) !important; }

.gsc-completion-container { background-color: var(--bg) !important; border: 1.5px solid var(--red-dark) !important; border-radius: 12px !important; font-family: var(--font-sans) !important;}
.gsc-completion-item:hover { background-color: rgba(139, 31, 40, 0.1) !important; }

/* ----------------------------------
   하단 VHS 푸터
----------------------------------- */
.vhs-footer {
    position: absolute;
    bottom: 5vh; left: 4vw; right: 4vw;
}
.vhs-label-bar {
    background: var(--red-dark); color: var(--bg); padding: 10px 16px;
    display: flex; justify-content: space-between; align-items: center; font-family: var(--font-sans); font-size: 0.85rem;
}
.since-btn {
    background: transparent; border: none; color: var(--bg);
    font-family: var(--font-serif-kr); /* 한글 세리프체 적용 */
    font-weight: 700;
    font-size: 0.85rem; cursor: pointer; display: flex; align-items: center;
}
.since-btn:hover { opacity: 0.8; }
.vhs-stripes { display: flex; flex-direction: column; gap: 4px; margin-top: 4px; }
.stripe { width: 100%; }
.s-3 { height: 18px; background: var(--red-main); }
.s-2 { height: 12px; background: var(--orange); }
.s-1 { height: 6px; background: var(--yellow); }

/* ----------------------------------
   API 모달
----------------------------------- */
#api-modal {
    display: none; position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0,0,0,0.5); z-index: 2000; align-items: center; justify-content: center;
}
.modal-content {
    background: var(--bg); padding: 30px; border-radius: 12px;
    width: 90%; max-width: 400px; border: 1.5px solid var(--red-dark);
}
.modal-header { font-family: var(--font-sans); font-weight: 700; font-size: 1.2rem; margin-bottom: 10px; color: var(--red-dark); }
.api-input-group input {
    width: 100%; padding: 12px; border: 1px solid var(--red-dark);
    border-radius: 8px; background: transparent; margin-bottom: 20px; font-family: var(--font-sans);
}
.modal-buttons { display: flex; justify-content: flex-end; gap: 10px; }
.btn { padding: 8px 16px; border-radius: 30px; font-family: var(--font-sans); font-weight: 600; cursor: pointer; font-size: 0.9rem; transition: opacity 0.2s ease; }
.btn:active { animation: btnPress 0.25s cubic-bezier(0.23, 1, 0.32, 1) forwards; }
.btn-filled { background: var(--red-dark); color: var(--bg); border: none; }
.btn-outline { border: 1.5px solid var(--red-dark); color: var(--red-dark); background: transparent; }

.loading-spinner {
    display: inline-block; width: 14px; height: 14px;
    border: 2px solid rgba(139, 31, 40, 0.3); border-top-color: var(--red-dark);
    border-radius: 50%; animation: spin 1s linear infinite; vertical-align: middle; margin-right: 8px;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ----------------------------------
   답변 지연 안내 (답변이 느린가요?)
----------------------------------- */
.slow-response-container {
    margin-top: 6px;
    font-family: var(--font-sans);
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.slow-response-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.75rem;
    font-weight: 600;
    color: rgba(40, 40, 40, 0.6);
    cursor: pointer;
    background-color: rgba(40, 40, 40, 0.04);
    padding: 6px 14px;
    border-radius: 20px;
    border: 1px solid rgba(40, 40, 40, 0.05);
    transition: all 0.3s ease;
    user-select: none;
    letter-spacing: -0.02em;
    animation: none;
}

.slow-response-btn:hover {
    color: var(--red-dark);
    background-color: rgba(139, 31, 40, 0.04);
    border-color: rgba(139, 31, 40, 0.15);
    box-shadow: 0 3px 8px rgba(139, 31, 40, 0.06);
}

.slow-response-btn:active { animation: btnPress 0.25s cubic-bezier(0.23, 1, 0.32, 1) forwards; }

.slow-response-btn svg {
    width: 13px;
    height: 13px;
    fill: currentColor;
    opacity: 0.8;
}

.slow-response-desc {
    font-size: 0.8rem;
    color: #555;
    background: linear-gradient(135deg, rgba(139, 31, 40, 0.02), rgba(139, 31, 40, 0.06));
    border: 1px solid rgba(139, 31, 40, 0.1);
    border-left: 3px solid var(--red-dark);
    line-height: 1.6;
    border-radius: 2px 10px 10px 10px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.03);
    
    max-height: 0;
    opacity: 0;
    padding: 0 16px;
    margin-top: 0;
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.25, 1, 0.5, 1);
    word-break: keep-all;
}

.slow-response-desc.show {
    max-height: 200px;
    opacity: 1;
    padding: 12px 16px;
    margin-top: 10px;
}

/* ----------------------------------
   AI Thinking (사고 과정)
----------------------------------- */
.ai-thinking {
    margin: 15px 0;
    border: 1px solid rgba(139, 31, 40, 0.2);
    border-radius: 8px;
    background-color: rgba(139, 31, 40, 0.02);
    overflow: hidden;
}
.ai-thinking summary {
    padding: 10px 14px;
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 600;
    color: #666;
    background-color: rgba(139, 31, 40, 0.05);
    user-select: none;
    transition: background-color 0.2s ease, color 0.2s ease;
}
.ai-thinking summary:hover {
    background-color: rgba(139, 31, 40, 0.1);
    color: var(--red-dark);
}
.thinking-content {
    padding: 14px;
    font-size: 0.85rem;
    color: #777;
    border-top: 1px solid rgba(139, 31, 40, 0.1);
    line-height: 1.6;
}
.thinking-content p { margin-bottom: 8px; }
.thinking-content p:last-child { margin-bottom: 0; }

/* 아코디언 펼쳐질 때의 스타일 및 애니메이션 */
.ai-thinking summary {
    display: flex;
    align-items: center;
    list-style: none; /* 기본 화살표 제거 */
}

.ai-thinking summary::-webkit-details-marker {
    display: none;
}

.ai-thinking summary::before {
    content: "→";
    display: inline-block;
    margin-right: 10px;
    font-size: 0.8rem;
    transition: transform 0.3s ease;
    color: var(--red-dark);
}

.ai-thinking[open] summary::before {
    transform: rotate(90deg);
}

.ai-thinking[open] .thinking-content {
    animation: accordionReveal 0.4s cubic-bezier(0.23, 1, 0.32, 1);
}

@keyframes accordionReveal {
    0% {
        opacity: 0;
        transform: translateY(-10px) scaleY(0.95);
        transform-origin: top;
    }
    100% {
        opacity: 1;
        transform: translateY(0) scaleY(1);
        transform-origin: top;
    }
}

@keyframes pulse-opacity {
    0% { opacity: 0.3; }
    50% { opacity: 1; }
    100% { opacity: 0.3; }
}
.thinking-cursor {
    display: inline-block;
    width: 6px;
    height: 14px;
    background-color: var(--red-dark);
    margin-left: 4px;
    vertical-align: middle;
    animation: pulse-opacity 1s infinite;
}

/* ----------------------------------
   좌측 패널 좁아짐 대응 (드래그 리사이즈)
----------------------------------- */
.left-panel.narrow {
    padding: 6vh 3vw;
}

.left-panel.narrow .main-title {
    font-size: clamp(1.8rem, 3.5vw, 2.8rem);
    margin-bottom: 1.5rem;
}

.left-panel.narrow .search-container {
    margin-bottom: 20px;
}

.left-panel.narrow input.gsc-input {
    height: 40px !important;
    font-size: 0.9rem !important;
    padding: 0 16px !important;
}

.left-panel.narrow .ai-summary-box {
    border-radius: 8px;
}

.left-panel.narrow .summary-actions {
    flex-wrap: wrap;
    gap: 6px;
}

.left-panel.narrow .summary-badge {
    font-size: 0.75rem;
    padding: 5px 12px;
}

.left-panel.narrow .icon-badge {
    width: 26px;
    height: 26px;
}

.left-panel.narrow .icon-badge svg {
    width: 13px;
    height: 13px;
}

.left-panel.narrow .ai-summary-scroll-area {
    max-height: 35vh;
    padding: 8px 16px 16px 16px;
}

.left-panel.narrow #ai-summary-content {
    font-size: 0.85rem;
    line-height: 1.6;
}

.left-panel.narrow .vhs-footer {
    bottom: 3vh;
    left: 3vw;
    right: 3vw;
}

.left-panel.narrow .vhs-label-bar {
    padding: 6px 10px;
    font-size: 0.75rem;
}

.left-panel.narrow .s-3 { height: 12px; }
.left-panel.narrow .s-2 { height: 8px; }
.left-panel.narrow .s-1 { height: 4px; }

/* 매우 좁은 상태 (.very-narrow) */
.left-panel.very-narrow {
    padding: 4vh 2vw;
}

.left-panel.very-narrow .main-title {
    font-size: clamp(1.2rem, 2.5vw, 1.8rem);
    margin-bottom: 1rem;
}

.left-panel.very-narrow .summary-actions {
    right: 8px !important;
}

.left-panel.very-narrow .summary-badge {
    font-size: 0.65rem;
    padding: 4px 8px;
    letter-spacing: 0;
}

.left-panel.very-narrow .ai-summary-scroll-area {
    max-height: 30vh;
    padding: 6px 10px 12px 10px;
}

.left-panel.very-narrow #ai-summary-content {
    font-size: 0.8rem;
    line-height: 1.5;
}

.left-panel.very-narrow .vhs-footer .brand-name,
.left-panel.very-narrow .vhs-footer #ollama-status {
    font-size: 0.65rem;
}

/* ----------------------------------
   모바일 웹 레이아웃
----------------------------------- */
@media (max-width: 1024px) {
    body { overflow-x: hidden; }
    
    .layout-grid {
        flex-direction: column;
        display: flex;
    }
    
    .fixed-vertical-line { display: none; }
    .expanded-overlay { display: none !important; }
    
    .left-panel {
        position: relative;
        width: 100% !important;
        height: auto;
        padding: 40px 24px 20px 24px;
        border-bottom: 2px solid var(--red-main);
        background-color: var(--bg);
        z-index: 10;
    }
    
    .right-panel {
        margin-left: 0 !important;
        width: 100% !important;
        min-height: auto;
        padding: 20px 24px 60px 24px;
    }
    
    .main-title {
        font-size: 3.5rem;
        margin-bottom: 1.5rem;
    }

    input.gsc-input { font-size: 16px !important; }

    .gsc-control-wrapper-cse, .gsc-results-wrapper-nooverlay {
        width: 100% !important;
        overflow-x: hidden !important;
    }

    .vhs-footer {
        position: relative;
        bottom: auto; left: auto; right: auto;
        margin-top: 30px;
        width: 100%;
    }
    
    .gsc-webResult.gsc-result { padding: 20px !important; }

    .ai-summary-box.expanded {
        position: fixed;
        width: 95vw;
        height: 85vh;
        border-radius: 12px;
        padding: 0;
    }
    .ai-summary-box.expanded .ai-summary-scroll-area {
        max-height: calc(85vh - 70px);
        padding: 50px 24px 24px 24px;
    }

    /* 모바일에서 인라인 스타일 강제 오버라이드 */
    .left-panel.narrow,
    .left-panel.very-narrow {
        padding: 40px 24px 20px 24px;
    }
}

@media (max-width: 480px) {
    .main-title {
        font-size: 2.5rem;
    }
    
    .intro-heading {
        font-size: 1.8rem !important;
    }
    
    .intro-desc {
        font-size: 0.95rem !important;
    }
}