/* Pretendard는 각 페이지가 <link>로 직접 불러온다.
   여기서 @import하면 CSS 파싱이 한 단계 더 지연되므로 두지 않는다. */

/* 페이지는 문서 흐름대로 세로 스크롤한다.
   (구 레이아웃은 height:100% + overflow:auto로 뷰포트에 고정했으나,
    콘텐츠가 자연스럽게 늘어나는 현재 구조에서는 아래 내용이 잘린다) */
html, body {
    min-height: 100%;
    margin: 0;
    padding: 0;
    width: 100%;
}

:root {
    /* ── 웜 앰버 디자인 시스템 (메인 페이지와 공유) ── */
    --ground:       oklch(0.97 0.012 70);
    --surface:      oklch(0.995 0.004 70);
    --surface-soft: oklch(0.98 0.008 60);

    --accent:       oklch(0.58 0.15 38);
    --accent-hover: oklch(0.52 0.15 38);
    --accent-text:  oklch(0.42 0.14 35);
    --accent-soft:  oklch(0.94 0.04 42);

    --border:       oklch(0.92 0.01 60);
    --border-soft:  oklch(0.93 0.01 60);

    --text:         oklch(0.27 0.02 50);
    --text-mid:     oklch(0.5 0.015 55);
    --text-muted:   oklch(0.62 0.01 60);

    --good:         oklch(0.55 0.13 150);
    --good-soft:    oklch(0.95 0.04 150);
}

body {
    background: var(--ground);
    color: var(--text);
    font-family: 'Pretendard', 'Noto Sans KR', -apple-system, BlinkMacSystemFont, sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

/* 전체 컨테이너 */
.container {
    display: block;
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    min-height: 100vh;
    padding: 26px 20px 40px;
    box-sizing: border-box;
}

/* 카드 */
.photo-preview-box {
    background: var(--surface);
    border-radius: 22px;
    box-shadow: 0 14px 44px oklch(0.3 0.02 50 / 0.09);
    width: 100%;
    display: flex;
    flex-direction: column;
    padding: 30px 32px 26px;
    box-sizing: border-box;
}

h2 {
    text-align: center;
    margin: 0 0 22px 0;
    color: var(--text);
    font-size: 1.5em;
    font-weight: 800;
    letter-spacing: -0.02em;
    text-wrap: balance;
    flex-shrink: 0;
}

/* ── 메인 레이아웃: 세로 스택 (탭 스트립 + 콘텐츠) ── */
.main-layout {
    display: flex;
    flex-direction: column;
    gap: 0;
    width: 100%;
    max-width: 880px;
    margin: 0 auto;
    min-height: 320px;
    overflow: visible;
}

/* ── SEO 설명 텍스트 ── */
.seo-description {
    font-size: 0.82em;
    color: var(--text-muted);
    line-height: 1.7;
    padding: 18px 2px 4px;
    margin-top: 18px;
    border-top: 1px solid var(--border-soft);
}

/* ── 사이즈 가이드 SEO 섹션 ── */
.seo-size-info {
    font-size: 0.82em;
    color: var(--text-muted);
    line-height: 1.7;
    padding: 6px 2px 2px;
}

.seo-size-info strong {
    color: var(--text-mid);
    display: block;
    margin-bottom: 4px;
}

.seo-size-info ul {
    margin: 0;
    padding-left: 18px;
}

.seo-size-info li {
    margin-bottom: 2px;
}

/* 상단 가로 탭 스트립 */
.info-tab-strip {
    width: 100%;
    flex-shrink: 0;
    display: flex;
    flex-direction: row;
    align-items: stretch;
    gap: 2px;
    padding: 0;
    border-bottom: 1px solid var(--border);
    margin-bottom: 24px;
    overflow-x: auto;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
}

.info-tab-strip::-webkit-scrollbar { display: none; }

.info-tab-btn {
    display: flex;
    align-items: center;
    padding: 11px 16px;
    font-size: 0.92em;
    border: none;
    border-bottom: 2px solid transparent;
    border-radius: 0;
    background: transparent;
    color: var(--text-mid);
    cursor: pointer;
    text-align: center;
    transition: color 0.15s, border-color 0.15s;
    font-weight: 700;
    white-space: nowrap;
    text-decoration: none;
    box-sizing: border-box;
    margin-bottom: -1px;
    flex-shrink: 0;
    font-family: inherit;
}

.info-tab-btn:hover {
    color: var(--accent-text);
}

.info-tab-btn.active {
    border-bottom-color: var(--accent);
    color: var(--accent-text);
}

/* 서비스 버튼 강조 — 홈으로 돌아가는 링크 */
.info-tab-btn.service-tab {
    background: var(--accent);
    color: #fff;
    line-height: 1.35;
    padding: 8px 14px;
    border-radius: 9px;
    border-bottom: none;
    margin: 6px 4px 6px 0;
    font-size: 0.82em;
    align-self: center;
    box-shadow: 0 3px 10px oklch(0.58 0.15 38 / 0.24);
}

.info-tab-btn.service-tab:hover {
    background: var(--accent-hover);
    color: #fff;
}

.info-tab-btn.service-tab.active {
    background: var(--accent-hover);
    border-bottom: none;
    color: #fff;
}

/* 구분선 — 세로 */
.tab-divider {
    width: 1px;
    height: 20px;
    background: var(--border);
    align-self: center;
    margin: 0 6px 0 2px;
    flex-shrink: 0;
}

/* 콘텐츠 영역 (서비스 대신 표시) */
.info-content-area {
    display: none;
    flex: 1;
    flex-direction: column;
    min-width: 0;
    overflow: visible;
    background: transparent;
}

/* 콘텐츠 헤더 */
.info-content-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 0 14px;
    border-bottom: 1px solid var(--border);
    background: transparent;
    flex-shrink: 0;
    margin-bottom: 20px;
}

.info-content-title {
    font-size: 1.15em;
    font-weight: 800;
    color: var(--accent-text);
    letter-spacing: -0.015em;
}

/* 섹션 허브로 돌아가기 */
.tool-back-link {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 5px 12px;
    border: 1px solid var(--border);
    border-radius: 99px;
    font-size: 0.8em;
    font-weight: 600;
    color: var(--text-mid);
    text-decoration: none;
    white-space: nowrap;
    flex-shrink: 0;
    transition: border-color 0.15s, color 0.15s, background 0.15s;
}

.tool-back-link:hover {
    border-color: var(--accent);
    color: var(--accent-text);
    background: var(--accent-soft);
}

/* 콘텐츠 본문 */
.info-content-body {
    flex: 1;
    padding: 0;
    font-size: 0.95em;
    line-height: 1.85;
    color: oklch(0.35 0.015 55);
}

.info-content-body h3 {
    font-size: 1.15em;
    color: var(--accent-text);
    margin: 0 0 12px 0;
    padding-bottom: 0;
    border-bottom: none;
    font-weight: 800;
    letter-spacing: -0.015em;
}

.info-content-body h4 {
    font-size: 1em;
    color: var(--text);
    margin: 22px 0 8px 0;
    font-weight: 700;
}

.info-content-body p {
    margin: 0 0 10px 0;
    color: oklch(0.35 0.015 55);
}

.info-content-body ul {
    margin: 6px 0 14px 0;
    padding-left: 18px;
    color: oklch(0.35 0.015 55);
}

.info-content-body li {
    margin-bottom: 5px;
}

.info-content-body a {
    color: var(--accent-text);
    font-weight: 600;
}

.info-content-body a:hover {
    color: var(--accent);
}

.info-tag {
    display: inline-block;
    background: var(--accent-soft);
    color: var(--accent-text);
    padding: 2px 9px;
    border-radius: 99px;
    font-size: 0.82em;
    font-weight: 700;
    margin-left: 6px;
    vertical-align: middle;
}

.info-quality-row {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 5px 0;
    border-bottom: 1px solid #f3f3f3;
    font-size: 0.93em;
}

.info-quality-dot {
    width: 9px;
    height: 9px;
    border-radius: 50%;
    flex-shrink: 0;
}

.dot-good  { background: #4caf50; }
.dot-ok    { background: #8bc34a; }
.dot-fair  { background: #ff9800; }
.dot-bad   { background: #f44336; }

/* ── 모바일 최적화 (UA / pointer:coarse / width<980px → <html class="is-mobile">) ── */
html.is-mobile .container { padding: 6px; }

html.is-mobile .photo-preview-box {
    padding: 20px 16px 20px;
    border-radius: 16px;
}

html.is-mobile h2 {
    font-size: 1.2em;
    margin-bottom: 16px;
}

html.is-mobile .main-layout {
    flex-direction: column;
    height: auto;
    min-height: unset;
    overflow: visible;
    gap: 0;
}

html.is-mobile .info-tab-strip {
    margin-bottom: 18px;
}

html.is-mobile .info-tab-btn {
    padding: 9px 12px;
    font-size: 0.82em;
}

html.is-mobile .info-tab-btn.service-tab {
    padding: 7px 11px;
    font-size: 0.76em;
}

html.is-mobile .info-content-header {
    padding-bottom: 10px;
    margin-bottom: 14px;
}

html.is-mobile .info-content-title {
    font-size: 1em;
}

html.is-mobile .info-content-body {
    padding: 0;
    font-size: 0.9em;
}

/* ── 도구 업로드 드롭존 ── */
.tool-dropzone {
    border: 1.5px dashed oklch(0.78 0.02 50);
    border-radius: 14px;
    padding: 40px 20px;
    text-align: center;
    cursor: pointer;
    transition: border-color 0.18s, background 0.18s, color 0.18s;
    background: var(--surface-soft);
    color: oklch(0.5 0.02 50);
    margin-bottom: 20px;
}

.tool-dropzone:hover,
.tool-dropzone.drag-over {
    border-color: var(--accent);
    background: var(--accent-soft);
    color: var(--accent-text);
}

.tool-dropzone-icon { font-size: 2.5em; margin-bottom: 8px; }
.tool-dropzone-text { color: inherit; font-size: 0.95em; font-weight: 700; }
.tool-dropzone-sub  { color: var(--text-muted); font-size: 0.82em; margin-top: 4px; }

/* ── 도구 결과 영역 ── */
.tool-result {
    display: none;
    flex-direction: column;
    gap: 16px;
}

.tool-result.visible { display: flex; }

.tool-before-after {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.tool-preview-box {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.tool-preview-label {
    font-size: 0.72em;
    color: var(--text-muted);
    font-weight: 800;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.tool-preview-img {
    width: 100%;
    height: 160px;
    object-fit: contain;
    background: var(--surface-soft);
    border-radius: 10px;
    border: 1px solid var(--border);
}

.tool-size-badge {
    font-size: 0.78em;
    color: var(--text-mid);
    background: var(--surface-soft);
    border: 1px solid var(--border);
    padding: 2px 9px;
    border-radius: 99px;
    display: inline-block;
    font-variant-numeric: tabular-nums;
}

.tool-size-badge.smaller {
    color: var(--good);
    background: var(--good-soft);
    border-color: oklch(0.88 0.06 150);
    font-weight: 700;
}

/* ── 도구 컨트롤 ── */
.tool-controls {
    display: flex;
    flex-direction: column;
    gap: 12px;
    padding: 16px;
    background: var(--surface-soft);
    border-radius: 12px;
    border: 1px solid var(--border);
}

.tool-control-row {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.tool-control-label {
    font-size: 0.82em;
    font-weight: 700;
    color: var(--text-mid);
    min-width: 70px;
}

.tool-controls input[type="range"] {
    accent-color: var(--accent);
}

.tool-format-btns {
    display: flex;
    gap: 6px;
}

.tool-format-btn {
    padding: 6px 14px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--surface);
    color: var(--text-mid);
    font-size: 0.82em;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s;
    font-family: inherit;
}

.tool-format-btn:hover {
    border-color: var(--accent);
    color: var(--accent-text);
}

.tool-format-btn.active {
    border-color: var(--accent);
    background: var(--accent);
    color: #fff;
    font-weight: 700;
}

.tool-download-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 11px 24px;
    background: var(--accent);
    color: #fff;
    border: none;
    border-radius: 11px;
    font-size: 0.9em;
    font-weight: 700;
    cursor: pointer;
    text-decoration: none;
    transition: background 0.18s;
    align-self: flex-start;
    box-shadow: 0 6px 16px oklch(0.58 0.15 38 / 0.24);
    font-family: inherit;
}

.tool-download-btn:hover { background: var(--accent-hover); }

.tool-info-box {
    background: var(--good-soft);
    border: 1px solid oklch(0.88 0.06 150);
    border-radius: 10px;
    padding: 11px 14px;
    font-size: 0.87em;
    color: oklch(0.42 0.12 150);
    line-height: 1.6;
}

/* 카드 그리드 (허브 페이지) */
.tool-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 14px;
    margin: 0 0 20px;
}

.tool-card {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
    padding: 20px 18px;
    background: var(--surface-soft);
    border: 1px solid var(--border);
    border-radius: 14px;
    text-decoration: none;
    color: inherit;
    transition: border-color 0.15s, box-shadow 0.15s, background 0.15s, transform 0.15s;
    cursor: pointer;
}

.tool-card:hover {
    border-color: var(--accent);
    background: var(--accent-soft);
    box-shadow: 0 6px 18px oklch(0.58 0.15 38 / 0.13);
    transform: translateY(-2px);
}

.tool-card-icon {
    font-size: 1.7em;
    line-height: 1;
}

.tool-card-title {
    font-size: 0.95em;
    font-weight: 800;
    color: var(--accent-text);
}

.tool-card-desc {
    font-size: 0.8em;
    color: var(--text-mid);
    line-height: 1.5;
}

.exif-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85em;
    margin-bottom: 18px;
}

.exif-table th,
.exif-table td {
    padding: 8px 11px;
    border: 1px solid var(--border);
    text-align: left;
}

.exif-table th {
    background: var(--accent-soft);
    font-weight: 700;
    color: var(--accent-text);
    width: 38%;
}

.exif-table td {
    color: var(--text-mid);
    word-break: break-all;
    font-variant-numeric: tabular-nums;
}

.exif-table tr:nth-child(even) td {
    background: var(--surface-soft);
}

/* 모바일 */
html.is-mobile .tool-grid {
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}

html.is-mobile .tool-card {
    padding: 14px 12px;
}

html.is-mobile .tool-before-after {
    flex-direction: column;
}

html.is-mobile .tool-controls {
    padding: 10px;
}

/* ── 사이트 상단 네비게이션 ── */
.site-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 2000;
    height: 54px;
    background: oklch(0.995 0.004 70 / 0.96);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid oklch(0.9 0.012 60);
}

.site-nav-inner {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
    height: 100%;
    display: flex;
    align-items: center;
    gap: 22px;
}

.site-nav-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    color: var(--text);
    flex-shrink: 0;
}

.site-nav-logo-icon {
    width: 22px;
    height: 22px;
    border-radius: 7px;
    background: oklch(0.58 0.15 38);
    display: inline-block;
    flex-shrink: 0;
}

.site-nav-logo-text {
    font-size: 1.02em;
    font-weight: 800;
    color: oklch(0.27 0.02 50);
    letter-spacing: -0.02em;
}

.site-nav-logo-dot {
    color: oklch(0.58 0.15 38);
}

.site-nav-links {
    display: flex;
    align-items: center;
    gap: 2px;
    overflow-x: auto;
    scrollbar-width: none;
    flex: 1;
    -webkit-overflow-scrolling: touch;
}

.site-nav-links::-webkit-scrollbar { display: none; }

.site-nav-link {
    display: flex;
    align-items: center;
    padding: 7px 13px;
    border-radius: 8px;
    text-decoration: none;
    font-size: 0.86em;
    font-weight: 600;
    color: oklch(0.52 0.015 55);
    white-space: nowrap;
    transition: background 0.15s, color 0.15s;
    flex-shrink: 0;
}

.site-nav-link:hover {
    background: oklch(0.95 0.015 60);
    color: oklch(0.42 0.14 35);
}

.site-nav-link.active {
    background: oklch(0.94 0.04 42);
    color: oklch(0.40 0.14 35);
    font-weight: 700;
}

/* 모바일 네비게이션 */
html.is-mobile .site-nav { height: 46px; }
html.is-mobile .site-nav-inner { padding: 0 12px; gap: 10px; }
html.is-mobile .site-nav-logo-icon { width: 18px; height: 18px; border-radius: 5px; }
html.is-mobile .site-nav-logo-text { font-size: 0.9em; }
html.is-mobile .site-nav-link { padding: 5px 10px; font-size: 0.8em; }