:root {
    --palette-bg-primary-core: #ff385c;
    --palette-text-primary: #222222;
    --palette-text-secondary: #6a6a6a;
    --palette-bg-secondary: #f2f2f2;
    --palette-border: #dddddd;
    
    /* Three-layer warm lift shadow */
    --shadow-card: rgba(0,0,0,0.02) 0px 0px 0px 1px, rgba(0,0,0,0.04) 0px 2px 6px, rgba(0,0,0,0.1) 0px 4px 8px;
    --shadow-hover: rgba(0,0,0,0.08) 0px 4px 12px;
    
    --radius-btn: 8px;
    --radius-pill: 50px;
    --radius-card: 20px;
    --radius-img: 14px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    margin: 0;
    padding: 0;
    color: var(--palette-text-primary);
    background-color: #ffffff;
    -webkit-font-smoothing: antialiased;
    line-height: 1.43;
}

/* Typography Hierarchy */
h1, h2, h3, h4 {
    margin: 0;
    font-weight: 700;
    letter-spacing: -0.44px;
    color: var(--palette-text-primary);
}

.text-small {
    font-size: 13px;
    color: var(--palette-text-secondary);
}

/* Layout & Header */
.header {
    border-bottom: 1px solid var(--palette-border);
    padding: 20px 24px;
    background: #fff;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    max-width: 1128px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.brand-logo {
    color: var(--palette-bg-primary-core);
    font-size: 24px;
    letter-spacing: -0.44px;
}

.main-content {
    max-width: 1128px;
    margin: 0 auto;
    padding: 48px 24px;
}

/* Hero & Search Container */
.hero-section {
    text-align: center;
    margin-bottom: 64px;
}

.hero-title {
    font-size: 32px;
    margin-bottom: 40px;
    color: var(--palette-text-primary);
}

.search-card {
    background: #ffffff;
    border-radius: var(--radius-pill);
    box-shadow: var(--shadow-card);
    padding: 8px 8px 8px 24px;
    display: flex;
    align-items: center;
    max-width: 720px;
    margin: 0 auto;
    border: 2px solid transparent;
    transition: box-shadow 0.2s, border-color 0.2s;
}

.search-card:focus-within {
    background: #ffffff;
    border-color: #ff0000;
    box-shadow: 0 4px 20px rgba(255, 0, 0, 0.15);
}

.search-input-wrapper {
    flex: 1;
}

.search-input {
    width: 100%;
    border: none;
    outline: none;
    font-size: 16px;
    font-weight: 500;
    color: var(--palette-text-primary);
    background: transparent;
}

.search-input::placeholder {
    color: var(--palette-text-secondary);
    font-weight: 400;
}

.search-options {
    display: flex;
    gap: 8px;
    align-items: center;
}

.secure-text {
    margin-top: 24px;
    font-size: 14px;
    font-weight: 500;
    color: var(--palette-text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

/* Search Card ... */
/* AdSense Containers - 무효 클릭 방지(40px 마진) 및 CLS(레이아웃 이동) 방지(최소 높이) */
.ad-container {
    background: var(--palette-bg-secondary);
    border: 1px dashed var(--palette-border);
    border-radius: var(--radius-card);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 40px auto;
    max-width: 800px;
    width: 100%;
    overflow: hidden;
    color: var(--palette-text-secondary);
}

.ad-top {
    min-height: 100px; /* 상단 반응형 띠배너용 높이 확보 */
    margin-top: 0;
}

.ad-middle {
    min-height: 250px; /* 사각형 광고용 높이 확보 */
}

.ad-bottom {
    min-height: 200px; /* 멀티플렉스/반응형 높이 확보 */
    margin-bottom: 80px;
}

.ad-label {
    font-size: 12px;
    letter-spacing: 1px;
    text-transform: uppercase;
}

/* Controls & Interactive Elements */
.select-pill {
    padding: 10px 16px;
    border-radius: var(--radius-pill);
    border: 1px solid var(--palette-border);
    background: #ffffff;
    color: var(--palette-text-primary);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    outline: none;
    transition: box-shadow 0.2s;
}

.select-pill:hover {
    box-shadow: var(--shadow-card);
}

.btn-primary {
    background: var(--palette-text-primary);
    color: #ffffff;
    border: none;
    border-radius: var(--radius-pill);
    padding: 12px 24px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s, transform 0.1s;
    text-decoration: none;
    display: inline-block;
}

.btn-primary:hover {
    background: var(--palette-bg-primary-core);
}

.btn-primary:active {
    transform: scale(0.96);
}

.btn-secondary {
    background: #ffffff;
    color: var(--palette-text-primary);
    border: 1px solid var(--palette-text-primary);
    border-radius: var(--radius-btn);
    padding: 12px 24px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
}

.btn-secondary:hover {
    background: var(--palette-bg-secondary);
}

/* Result Area */
.result-section {
    margin-top: 48px;
    text-align: center;
}

.card {
    background: #ffffff;
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
    padding: 24px;
    margin-bottom: 24px;
}

.result-card {
    max-width: 800px;
    margin: 0 auto 24px auto;
}

.thumbnail-wrapper {
    border-radius: var(--radius-img);
    overflow: hidden;
    margin-bottom: 24px;
    background: var(--palette-bg-secondary);
}

.thumbnail-img {
    width: 100%;
    height: auto;
    display: block;
}

.result-details {
    display: flex;
    flex-direction: column;
    gap: 16px;
    align-items: center;
}

.quality-info {
    font-size: 20px;
    font-weight: 600;
    letter-spacing: -0.18px;
}

.action-buttons {
    display: flex;
    gap: 12px;
}

.btn-download, .btn-copy {
    border-radius: var(--radius-btn);
}

.disclaimer {
    max-width: 800px;
    margin: 0 auto;
    background: #f8f8f8;
    padding: 16px;
    border-radius: 12px;
}

/* History Grid */
.section-title {
    font-size: 22px;
    margin-bottom: 24px;
}

.history-section {
    margin-top: 80px;
}

.history-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 20px;
}

.history-card {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.history-item {
    border-radius: var(--radius-img);
    overflow: hidden;
    cursor: pointer;
    box-shadow: var(--shadow-card);
    transition: transform 0.2s, box-shadow 0.2s;
    background: var(--palette-bg-secondary);
}

.history-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
}

.history-item img {
    width: 100%;
    height: auto;
    display: block;
}

.history-link {
    text-align: center;
    font-size: 14px;
    color: var(--palette-text-secondary);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.2s;
}

.history-link:hover {
    color: var(--palette-text-primary);
    text-decoration: underline;
}

/* FAQ */
.seo-faq {
    margin-top: 80px;
    padding-top: 64px;
    border-top: 1px solid var(--palette-border);
}

.faq-list {
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.faq-item h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
    letter-spacing: -0.18px;
}

.faq-item p {
    font-size: 16px;
    color: var(--palette-text-secondary);
    margin: 0;
}

.footer {
    border-top: 1px solid var(--palette-border);
    padding: 40px 24px;
    text-align: center;
    margin-top: 80px;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 24px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.footer-links a {
    color: var(--palette-text-secondary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: color 0.2s;
}

.footer-links a:hover {
    color: var(--palette-text-primary);
}

/* Static Pages (Terms, Privacy, etc.) */
.page-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 64px 24px;
}

.page-title {
    font-size: 36px;
    margin-bottom: 40px;
    text-align: center;
    color: var(--palette-text-primary);
}

.page-content {
    background: #ffffff;
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
    padding: 40px;
}

.page-content h2 {
    font-size: 24px;
    margin-top: 32px;
    margin-bottom: 16px;
    letter-spacing: -0.18px;
}

.page-content h2:first-child {
    margin-top: 0;
}

.page-content p, .page-content li {
    font-size: 16px;
    color: var(--palette-text-secondary);
    line-height: 1.7;
    margin-bottom: 16px;
}

.page-content ul {
    margin-bottom: 24px;
    padding-left: 20px;
}

.back-link {
    display: inline-block;
    margin-bottom: 24px;
    color: var(--palette-text-primary);
    text-decoration: none;
    font-weight: 600;
    font-size: 14px;
}

.back-link:hover {
    text-decoration: underline;
}

/* Responsive Overrides */
@media (max-width: 744px) {
    .search-card {
        flex-direction: column;
        padding: 16px;
        gap: 16px;
        border-radius: var(--radius-card);
    }
    
    .search-input {
        padding: 8px 0;
        text-align: center;
    }
    
    .search-options {
        width: 100%;
        flex-direction: column;
    }
    
    .select-pill, .btn-primary {
        width: 100%;
        text-align: center;
        box-sizing: border-box;
    }
    
    .action-buttons {
        flex-direction: column;
        width: 100%;
    }
    
    .btn-download, .btn-copy {
        width: 100%;
        box-sizing: border-box;
    }
}