:root {
    --bg: #f5f7fb;
    --panel: #ffffff;
    --line: #dde3ef;
    --text: #1f2937;
    --subtext: #5b6475;
    --point: #2b5cff;
    --point-soft: #ecf1ff;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: "Segoe UI", Arial, sans-serif;
    color: var(--text);
    background: var(--bg);
}

.app-layout {
    display: grid;
    grid-template-columns: 280px 1fr;
    min-height: 100vh;
}

.sidebar {
    position: sticky;
    top: 0;
    height: 100vh;
    padding: 20px 16px;
    border-right: 1px solid var(--line);
    background: var(--panel);
    overflow-y: auto;
}

.brand-area {
    margin-bottom: 16px;
}

.brand-image {
    width: 100%;
    height: 120px;
    object-fit: cover;
    border-radius: 12px;
    border: 1px solid var(--line);
}

.brand-title {
    margin: 12px 0 0;
    font-size: 1.1rem;
}

.search-label {
    display: inline-block;
    margin: 8px 0;
    font-size: 0.9rem;
    color: var(--subtext);
}

.menu-search {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--line);
    border-radius: 10px;
    font-size: 0.95rem;
}

.menu-search:focus {
    outline: 2px solid var(--point-soft);
    border-color: var(--point);
}

.menu-list {
    list-style: none;
    margin: 14px 0 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.menu-link {
    display: block;
    padding: 10px 12px;
    border: 1px solid transparent;
    border-radius: 10px;
    color: var(--text);
    text-decoration: none;
    background: #f9fbff;
}

.menu-link:hover {
    border-color: var(--line);
    background: #f1f5ff;
}

.menu-link.is-active {
    border-color: var(--point);
    background: var(--point-soft);
}

.menu-desc {
    display: block;
    margin-top: 4px;
    font-size: 0.82rem;
    color: var(--subtext);
}

.content-area {
    padding: 28px;
}

.content-section {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 14px;
    padding: 20px;
    margin-bottom: 16px;
}

.lead-text {
    color: var(--subtext);
    line-height: 1.6;
}

.content-image {
    display: block;
    width: min(720px, 100%);
    border-radius: 12px;
    border: 1px solid var(--line);
}

.content-card {
    padding: 14px;
    border: 1px dashed #bdc7dd;
    border-radius: 10px;
    background: #fbfcff;
    cursor: pointer;
}

.content-card.is-highlighted {
    border-color: var(--point);
    background: var(--point-soft);
}

.code-block {
    margin: 0;
    padding: 14px;
    border-radius: 10px;
    background: #0f172a;
    color: #e5edff;
    font-size: 0.9rem;
    overflow-x: auto;
}

.primary-btn {
    padding: 10px 16px;
    border: 1px solid var(--point);
    border-radius: 10px;
    background: var(--point);
    color: #ffffff;
    font-size: 0.95rem;
    cursor: pointer;
}

.primary-btn:hover {
    filter: brightness(1.05);
}

.secondary-btn {
    padding: 10px 16px;
    border: 1px solid #c3cce0;
    border-radius: 10px;
    background: #ffffff;
    color: var(--text);
    font-size: 0.95rem;
    cursor: pointer;
}

/* 처음에는 보이지 않게 설정 */
.hidden {
    display: none !important;
}

/* 배경을 어둡게 만들어 뒤쪽 클릭을 막습니다 */
#modalContainer {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 16px;
    z-index: 1000;
    backdrop-filter: blur(2px);
}

/* 스텝퍼 스타일 */
.stepper {
    display: flex;
    justify-content: space-between;
    margin-bottom: 20px;
    padding: 20px;
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 14px;
}

.step {
    padding: 10px 20px;
    border-bottom: 3px solid var(--line);
    color: var(--subtext);
    font-weight: normal;
    text-align: center;
    flex: 1;
    position: relative;
}

.step.active {
    border-bottom: 3px solid var(--point);
    color: var(--point);
    font-weight: bold;
}

.step.completed {
    border-bottom: 3px solid var(--point);
    color: var(--point);
}

.step.completed::after {
    content: "✓";
    position: absolute;
    top: -5px;
    right: 10px;
    color: var(--point);
    font-weight: bold;
}

.step-content {
    display: none;
    padding: 20px;
    border: 1px solid var(--line);
    border-radius: 14px;
    background: var(--panel);
    margin-bottom: 20px;
}

.step-content.active {
    display: block;
}

.step-content.active {
    display: block;
}

.stepper-controls {
    display: flex;
    gap: 10px;
    justify-content: center;
}

/* 토글 스타일 */
.toggle-switch {
    position: relative;
    display: inline-block;
    width: 60px;
    height: 34px;
}

.toggle-switch input {
    display: none;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--line);
    transition: 0.4s;
    border-radius: 34px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 26px;
    width: 26px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: 0.4s;
    border-radius: 50%;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

input:checked + .slider {
    background-color: var(--point);
}

input:checked + .slider:before {
    transform: translateX(26px);
}

.toggle-label {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
}

/* 프로그레스바 스타일 */
.progress-container {
    width: 100%;
    height: 20px;
    background-color: var(--line);
    border-radius: 10px;
    overflow: hidden;
    margin-bottom: 10px;
}

.progress-bar {
    width: 0%;
    height: 100%;
    background-color: var(--point);
    transition: width 0.5s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 0.75rem;
    font-weight: bold;
}

.progress-text {
    display: block;
    margin-top: 5px;
    font-size: 0.9rem;
    color: var(--subtext);
    text-align: center;
}

.progress-indeterminate {
    width: 30%;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent,
        var(--point),
        transparent
    );
    background-size: 200% 100%;
    animation: indeterminateAnimation 1.5s infinite;
}

@keyframes indeterminateAnimation {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

.progress-section {
    margin-bottom: 20px;
}

.progress-section h3 {
    margin-top: 0;
    margin-bottom: 10px;
}

/* 실제 모달 박스 */
#modalContent {
    background: #ffffff;
    padding: 20px;
    border-radius: 10px;
    width: min(360px, 100%);
    text-align: center;
    border: 1px solid var(--line);
    outline: none;
    max-height: calc(100vh - 32px);
    overflow: auto;
}

#modalContent:focus {
    box-shadow: 0 0 0 3px var(--point-soft);
}

#modalContent h3 {
    margin: 14px 0 8px;
    text-align: left;
    font-size: 0.95rem;
    color: var(--subtext);
}

#modalContent .code-block {
    text-align: left;
    white-space: pre-wrap;
}

.plain-list {
    margin: 0;
    padding-left: 18px;
    color: var(--subtext);
    line-height: 1.7;
}

.alert-compare {
    display: grid;
    gap: 10px;
}

.alert-compare-item {
    border: 1px solid var(--line);
    border-radius: 10px;
    background: #fbfcff;
    padding: 12px;
}

.alert-compare-item strong {
    display: inline-block;
    min-width: 70px;
}

.alert-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1100;
    padding: 16px;
}

.alert-box {
    background: #ffffff;
    padding: 24px;
    border-radius: 12px;
    text-align: center;
    width: min(340px, 100%);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.alert-icon {
    width: 44px;
    height: 44px;
    margin: 0 auto 10px;
    border-radius: 50%;
    display: grid;
    place-items: center;
    font-weight: 700;
    color: #ffffff;
}

.alert-icon.error {
    background: #ff4d4f;
}

.alert-title {
    margin: 0 0 8px;
}

.alert-message {
    margin: 0 0 14px;
    color: var(--subtext);
}

.alert-buttons {
    display: flex;
    justify-content: center;
    gap: 8px;
}

.btn-cancel,
.btn-confirm {
    padding: 10px 14px;
    border-radius: 8px;
    cursor: pointer;
}

.btn-cancel {
    border: 1px solid #c3cce0;
    background: #ffffff;
    color: var(--text);
}

.btn-confirm {
    background: #ff4d4f;
    color: #ffffff;
    border: none;
}

/* 토스트 전체 위치 설정 */
#toastContainer {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 9999;
}

/* 토스트 상자 스타일 */
.toast-message {
    display: none;
    background: rgba(0, 0, 0, 0.8);
    color: #ffffff;
    padding: 12px 25px;
    border-radius: 30px;
    font-size: 14px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
    animation: fadeInUp 0.5s;
}

/* 아래에서 위로 올라오는 애니메이션 */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.pagination-container {
    display: flex;
    justify-content: center;
    margin-top: 20px;
}

.pagination {
    display: flex;
    list-style: none;
    padding: 0;
    margin: 0;
    gap: 6px;
    align-items: center;
    flex-wrap: wrap;
}

.page-item {
    margin: 0;
}

.page-link {
    display: block;
    padding: 8px 14px;
    text-decoration: none;
    color: #333333;
    border: 1px solid #dddddd;
    border-radius: 8px;
    transition: background 0.3s;
    min-width: 40px;
    text-align: center;
}

.page-link:hover {
    background-color: #f0f0f0;
}

.page-item.active .page-link {
    background-color: #7a3df0;
    color: #ffffff;
    border-color: #7a3df0;
    font-weight: 700;
}

.prev, .next, .first, .last {
    background-color: #f8f9fa;
    font-weight: 700;
}

.tooltip-btn {
    position: relative;
    padding: 10px 20px;
    cursor: pointer;
}

.tooltip-btn::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 125%;
    left: 50%;
    transform: translateX(-50%);
    background: #333333;
    color: #ffffff;
    padding: 8px 12px;
    border-radius: 5px;
    font-size: 12px;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: 0.3s;
    box-shadow: 0 6px 14px rgba(0, 0, 0, 0.18);
    pointer-events: none;
}

.tooltip-btn::before {
    content: "";
    position: absolute;
    bottom: calc(125% - 6px);
    left: 50%;
    transform: translateX(-50%);
    border-width: 6px 6px 0;
    border-style: solid;
    border-color: #333333 transparent transparent transparent;
    opacity: 0;
    visibility: hidden;
    transition: 0.3s;
}

.tooltip-btn:hover::after,
.tooltip-btn:hover::before,
.tooltip-btn:focus-visible::after,
.tooltip-btn:focus-visible::before {
    opacity: 1;
    visibility: visible;
}

.dropdown {
    position: relative;
    width: min(260px, 100%);
}

.dropdown-toggle {
    width: 100%;
    padding: 12px 15px;
    background: #ffffff;
    border: 1px solid #dddddd;
    border-radius: 8px;
    text-align: left;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.dropdown-toggle:focus-visible {
    outline: 2px solid var(--point-soft);
    border-color: var(--point);
}

.dropdown-menu {
    display: none;
    position: absolute;
    top: 110%;
    left: 0;
    width: 100%;
    background: #ffffff;
    border: 1px solid #dddddd;
    border-radius: 8px;
    list-style: none;
    padding: 0;
    margin: 0;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    z-index: 100;
}

.dropdown-menu li a {
    display: block;
    padding: 10px 15px;
    text-decoration: none;
    color: #333333;
}

.dropdown-menu li a:hover {
    background-color: #f8f9fa;
}

.dropdown.active .dropdown-menu {
    display: block;
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 20px;
}

.card {
    background: #ffffff;
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid #eeeeee;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.15);
}

.card-thumb {
    aspect-ratio: 16 / 10;
    overflow: hidden;
}

.card-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.card-content {
    padding: 20px;
}

.category {
    font-size: 12px;
    color: #007bff;
    font-weight: 700;
    text-transform: uppercase;
}

.title {
    font-size: 1.2rem;
    margin: 10px 0;
    color: #333333;
}

.description {
    font-size: 0.9rem;
    color: #666666;
    line-height: 1.5;
    margin-bottom: 16px;
}

.card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 10px;
}

.date {
    font-size: 0.82rem;
    color: #8a93a3;
}

.btn-more {
    border: 1px solid #d9deea;
    background: #ffffff;
    color: #333333;
    border-radius: 8px;
    padding: 8px 12px;
    cursor: pointer;
}

.cta-section {
    text-align: center;
    padding: 30px 20px;
    border: 1px solid var(--line);
    border-radius: 16px;
    background: linear-gradient(180deg, #f8f4ff 0%, #ffffff 100%);
}

.btn-cta {
    display: inline-block;
    padding: 18px 36px;
    font-size: 1.05rem;
    font-weight: 700;
    text-decoration: none;
    border-radius: 50px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    border: none;
    cursor: pointer;
}

.btn-cta.primary {
    background: #ff6b00;
    color: #ffffff;
}

.btn-cta.primary:hover {
    background: #e66000;
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(255, 107, 0, 0.3);
}

.btn-cta.secondary {
    background: #6d28d9;
    color: #ffffff;
}

.btn-cta.secondary:hover {
    background: #5b21b6;
}

.fixed-cta {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 1000;
}

.carousel-container {
    width: min(100%, 960px);
    height: 320px;
    margin: 0 auto;
    overflow: hidden;
    position: relative;
    border-radius: 14px;
    border: 1px solid #e6ebf5;
}

.carousel-track {
    display: flex;
    width: 100%;
    height: 100%;
    transition: transform 0.5s ease;
}

.slide-item {
    min-width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.6rem;
    font-weight: 700;
    color: #ffffff;
}

.item1 { background: linear-gradient(135deg, #2563eb, #0ea5e9); }
.item2 { background: linear-gradient(135deg, #7c3aed, #ec4899); }
.item3 { background: linear-gradient(135deg, #059669, #14b8a6); }

.btn-prev, .btn-next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    padding: 10px 14px;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, 0.7);
    background: rgba(0, 0, 0, 0.35);
    color: #ffffff;
    cursor: pointer;
}

.btn-prev { left: 12px; }
.btn-next { right: 12px; }

.carousel-dots {
    position: absolute;
    left: 50%;
    bottom: 14px;
    transform: translateX(-50%);
    display: flex;
    gap: 8px;
}

.carousel-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    border: none;
    background: rgba(255, 255, 255, 0.5);
    cursor: pointer;
}

.carousel-dot.is-active {
    background: #ffffff;
}

.gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 10px;
}

.gallery img {
    width: 100%;
    aspect-ratio: 3 / 4;
    object-fit: cover;
    border-radius: 8px;
    border: 1px solid #d8dfeb;
    cursor: zoom-in;
}

#lightboxOverlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.88);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1200;
    flex-direction: column;
    padding: 24px;
}

#lightboxImage {
    max-width: 90%;
    max-height: 72vh;
    border: 3px solid #ffffff;
    box-shadow: 0 0 20px rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    object-fit: contain;
}

.close-btn {
    position: absolute;
    top: 16px;
    right: 24px;
    color: #ffffff;
    font-size: 44px;
    cursor: pointer;
    line-height: 1;
}

#caption {
    margin-top: 10px;
    color: #e5e7eb;
    font-size: 0.95rem;
}

.lightbox-counter {
    margin-top: 6px;
    color: #cfd6e3;
    font-size: 0.85rem;
}

.lightbox-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    border: 1px solid rgba(255, 255, 255, 0.7);
    background: rgba(0, 0, 0, 0.4);
    color: #ffffff;
    border-radius: 999px;
    width: 40px;
    height: 40px;
    cursor: pointer;
}

.lightbox-prev { left: 22px; }
.lightbox-next { right: 22px; }

@media (max-width: 980px) {
    .app-layout {
        grid-template-columns: 1fr;
    }

    .sidebar {
        position: static;
        height: auto;
        border-right: none;
        border-bottom: 1px solid var(--line);
    }
}

/* ── 푸터 ── */
.site-footer {
    border-top: 1px solid var(--line);
    background: var(--panel);
    padding: 28px 28px 24px;
    margin-top: auto;
}

.footer-inner {
    max-width: 960px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.footer-top {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 20px;
    flex-wrap: wrap;
}

.footer-brand .footer-logo {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text);
    margin: 0 0 6px;
}

.footer-brand .footer-tagline {
    font-size: 0.82rem;
    color: var(--subtext);
    margin: 0;
    line-height: 1.5;
}

.footer-nav {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    align-items: center;
}

.footer-nav a {
    font-size: 0.85rem;
    color: var(--subtext);
    text-decoration: none;
    padding: 4px 8px;
    border-radius: 6px;
    transition: background 0.15s, color 0.15s;
}

.footer-nav a:hover {
    background: var(--point-soft);
    color: var(--point);
}

.footer-divider {
    border: none;
    border-top: 1px solid var(--line);
    margin: 0;
}

.footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    flex-wrap: wrap;
}

.footer-copy {
    font-size: 0.8rem;
    color: var(--subtext);
    margin: 0;
}

.footer-badges {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.footer-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 0.75rem;
    color: var(--subtext);
    border: 1px solid var(--line);
    border-radius: 20px;
    padding: 3px 10px;
    background: #f9fbff;
}

/* content-area가 푸터를 포함하도록 flex 컬럼 설정 */
.content-area {
    display: flex;
    flex-direction: column;
}

.content-area > main,
.content-area {
    flex: 1;
}

@media (max-width: 600px) {
    .footer-top {
        flex-direction: column;
        gap: 14px;
    }

    .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }
}

/* ════════════════════════════════════════
   GNB (Global Navigation Bar) — 카테고리 탭
   ════════════════════════════════════════ */
:root {
    --gnb-h: 56px;
    --cat1: #2b5cff;
    --cat2: #7c3aed;
    --cat3: #059669;
    --cat4: #d97706;
}

.gnb {
    position: sticky;
    top: 0;
    z-index: 200;
    background: #ffffff;
    border-bottom: 1px solid var(--line);
    height: var(--gnb-h);
    display: flex;
    align-items: center;
    padding: 0 24px;
    gap: 4px;
}

.gnb-logo {
    font-size: 0.95rem;
    font-weight: 800;
    color: var(--point);
    text-decoration: none;
    margin-right: 20px;
    white-space: nowrap;
    letter-spacing: -0.3px;
}

.gnb-tabs {
    display: flex;
    gap: 2px;
    list-style: none;
    margin: 0;
    padding: 0;
    flex: 1;
    overflow-x: auto;
    scrollbar-width: none;
}

.gnb-tabs::-webkit-scrollbar { display: none; }

.gnb-tab a {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border-radius: 8px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--subtext);
    text-decoration: none;
    white-space: nowrap;
    transition: background 0.15s, color 0.15s;
}

.gnb-tab a:hover {
    background: var(--bg);
    color: var(--text);
}

.gnb-tab.cat1 a.is-active, .gnb-tab.cat1 a:hover { color: var(--cat1); background: #eef2ff; }
.gnb-tab.cat2 a.is-active, .gnb-tab.cat2 a:hover { color: var(--cat2); background: #f5f3ff; }
.gnb-tab.cat3 a.is-active, .gnb-tab.cat3 a:hover { color: var(--cat3); background: #ecfdf5; }
.gnb-tab.cat4 a.is-active, .gnb-tab.cat4 a:hover { color: var(--cat4); background: #fffbeb; }

.gnb-tab a .tab-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    flex-shrink: 0;
}
.gnb-tab.cat1 .tab-dot { background: var(--cat1); }
.gnb-tab.cat2 .tab-dot { background: var(--cat2); }
.gnb-tab.cat3 .tab-dot { background: var(--cat3); }
.gnb-tab.cat4 .tab-dot { background: var(--cat4); }

/* GNB가 있을 때 app-layout 조정 */
.has-gnb .app-layout {
    min-height: calc(100vh - var(--gnb-h));
}

/* ════════════════════════════════════════
   카테고리 허브 페이지 스타일
   ════════════════════════════════════════ */
.cat-hero {
    border-radius: 16px;
    padding: 40px 32px;
    color: #ffffff;
    margin-bottom: 0;
    border: none;
    position: relative;
    overflow: hidden;
}

.cat-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,0.08);
    border-radius: 16px;
}

.cat-hero > * { position: relative; }

.cat-hero h1 {
    font-size: 1.7rem;
    font-weight: 800;
    margin: 0 0 10px;
    color: #ffffff;
    letter-spacing: -0.5px;
}

.cat-hero p {
    font-size: 0.97rem;
    line-height: 1.7;
    margin: 0;
    opacity: 0.92;
}

.cat-hero.cat1 { background: linear-gradient(135deg, #2b5cff, #60a5fa); }
.cat-hero.cat2 { background: linear-gradient(135deg, #7c3aed, #ec4899); }
.cat-hero.cat3 { background: linear-gradient(135deg, #059669, #14b8a6); }
.cat-hero.cat4 { background: linear-gradient(135deg, #d97706, #f59e0b); }

.page-card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 14px;
}

.page-card {
    border: 1px solid var(--line);
    border-radius: 14px;
    padding: 20px;
    background: #ffffff;
    text-decoration: none;
    display: block;
    transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
}

.page-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.08);
    border-color: var(--point);
}

.page-card .pc-num {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--subtext);
    margin-bottom: 8px;
    display: block;
}

.page-card .pc-title {
    font-size: 0.97rem;
    font-weight: 700;
    color: var(--text);
    margin: 0 0 6px;
}

.page-card .pc-desc {
    font-size: 0.83rem;
    color: var(--subtext);
    line-height: 1.5;
    margin: 0;
}

.page-card .pc-badge {
    display: inline-block;
    margin-top: 10px;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
}

.pc-badge.interactive { background: #eef2ff; color: var(--cat1); }
.pc-badge.guide       { background: #f5f3ff; color: var(--cat2); }
.pc-badge.tool        { background: #ecfdf5; color: var(--cat3); }

/* ════════════════════════════════════════
   인터랙티브 도구 페이지 공통 스타일
   ════════════════════════════════════════ */
.tool-layout {
    display: grid;
    grid-template-columns: 260px 1fr;
    gap: 0;
    min-height: calc(100vh - var(--gnb-h));
}

.tool-sidebar {
    border-right: 1px solid var(--line);
    background: #ffffff;
    padding: 24px 16px;
    position: sticky;
    top: var(--gnb-h);
    height: calc(100vh - var(--gnb-h));
    overflow-y: auto;
}

.tool-sidebar .ts-category {
    font-size: 0.72rem;
    font-weight: 700;
    color: var(--subtext);
    text-transform: uppercase;
    letter-spacing: 0.8px;
    margin: 20px 0 8px;
    padding: 0 8px;
}

.tool-sidebar .ts-category:first-child { margin-top: 0; }

.tool-sidebar ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.tool-sidebar ul li a {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 9px 10px;
    border-radius: 8px;
    font-size: 0.85rem;
    color: var(--subtext);
    text-decoration: none;
    transition: background 0.15s, color 0.15s;
}

.tool-sidebar ul li a:hover {
    background: var(--bg);
    color: var(--text);
}

.tool-sidebar ul li a.is-active {
    background: var(--point-soft);
    color: var(--point);
    font-weight: 600;
}

.tool-sidebar ul li a .ts-num {
    font-size: 0.72rem;
    color: var(--subtext);
    min-width: 20px;
}

.tool-main {
    padding: 40px 48px;
    max-width: 900px;
}

.tool-header {
    margin-bottom: 32px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--line);
}

.tool-header .th-badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 700;
    background: var(--point-soft);
    color: var(--point);
    margin-bottom: 12px;
}

.tool-header h1 {
    font-size: 1.6rem;
    font-weight: 800;
    margin: 0 0 10px;
    letter-spacing: -0.5px;
    color: var(--text);
}

.tool-header p {
    color: var(--subtext);
    line-height: 1.7;
    font-size: 0.95rem;
    margin: 0;
}

.tool-section {
    margin-bottom: 40px;
}

.tool-section h2 {
    font-size: 1.1rem;
    font-weight: 700;
    margin: 0 0 16px;
    color: var(--text);
    display: flex;
    align-items: center;
    gap: 8px;
}

.tool-section h2::before {
    content: '';
    display: inline-block;
    width: 4px;
    height: 18px;
    background: var(--point);
    border-radius: 2px;
}

/* 인터랙티브 플레이그라운드 박스 */
.playground-box {
    border: 1px solid var(--line);
    border-radius: 14px;
    overflow: hidden;
    background: #ffffff;
}

.playground-controls {
    padding: 20px;
    background: #f8faff;
    border-bottom: 1px solid var(--line);
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
}

.ctrl-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
    min-width: 160px;
}

.ctrl-group label {
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--subtext);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.ctrl-group select,
.ctrl-group input[type="range"] {
    padding: 7px 10px;
    border: 1px solid var(--line);
    border-radius: 8px;
    font-size: 0.88rem;
    background: #ffffff;
    color: var(--text);
    cursor: pointer;
}

.ctrl-group select:focus,
.ctrl-group input:focus {
    outline: none;
    border-color: var(--point);
}

.playground-preview {
    padding: 32px;
    min-height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: repeating-linear-gradient(
        45deg,
        transparent,
        transparent 10px,
        rgba(43,92,255,0.03) 10px,
        rgba(43,92,255,0.03) 20px
    );
}

.playground-code {
    padding: 16px 20px;
    background: #0f172a;
    border-top: 1px solid var(--line);
    font-family: 'Fira Code', 'Consolas', monospace;
    font-size: 0.83rem;
    color: #e2e8f0;
    overflow-x: auto;
    white-space: pre;
    line-height: 1.6;
}

/* 코드 복사 버튼 */
.copy-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 7px 14px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #ffffff;
    color: var(--text);
    font-size: 0.82rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s;
}

.copy-btn:hover {
    background: var(--point);
    color: #ffffff;
    border-color: var(--point);
}

.copy-btn.copied {
    background: #059669;
    color: #ffffff;
    border-color: #059669;
}

/* 정보 카드 그리드 */
.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 12px;
}

.info-card {
    border: 1px solid var(--line);
    border-radius: 12px;
    padding: 16px;
    background: #ffffff;
}

.info-card .ic-label {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--subtext);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 6px;
}

.info-card .ic-value {
    font-size: 1rem;
    font-weight: 700;
    color: var(--point);
    font-family: 'Fira Code', monospace;
}

.info-card .ic-desc {
    font-size: 0.8rem;
    color: var(--subtext);
    margin-top: 4px;
    line-height: 1.4;
}

/* 비교 테이블 */
.compare-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.88rem;
}

.compare-table th,
.compare-table td {
    border: 1px solid var(--line);
    padding: 11px 14px;
    text-align: left;
    vertical-align: top;
    line-height: 1.5;
}

.compare-table th {
    background: #f5f7fb;
    font-weight: 700;
    color: var(--text);
}

.compare-table td {
    color: var(--subtext);
    background: #ffffff;
}

.compare-table tr:hover td {
    background: #f8faff;
}

/* 반응형 */
@media (max-width: 900px) {
    .tool-layout {
        grid-template-columns: 1fr;
    }
    .tool-sidebar {
        position: static;
        height: auto;
        border-right: none;
        border-bottom: 1px solid var(--line);
    }
    .tool-main {
        padding: 24px 20px;
    }
}