/* ===== CSS Variables ===== */
:root {
    /* Colors - Premium Credit Score Theme */
    --primary: #2563eb;
    --primary-dark: #1e40af;
    --primary-light: #60a5fa;
    --secondary: #10b981;
    --secondary-dark: #059669;
    --accent: #f59e0b;
    --accent-dark: #d97706;
    --danger: #ef4444;
    --danger-dark: #dc2626;
    --warning: #f59e0b;

    /* Backgrounds */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-card: #ffffff;
    --bg-hover: #f1f5f9;
    --bg-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);

    /* Text */
    --text-primary: #1e293b;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --text-white: #ffffff;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;

    /* Border Radius */
    --border-radius-sm: 0.375rem;
    --border-radius: 0.5rem;
    --border-radius-lg: 0.75rem;
    --border-radius-xl: 1rem;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);

    /* Font Sizes */
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;

    /* Transitions */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== Reset & Base ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-secondary);
    color: var(--text-primary);
    line-height: 1.6;
    font-size: var(--font-size-base);
}

/* ===== Container ===== */
.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: var(--spacing-md);
}

/* ===== Navigation ===== */
.main-nav {
    background: var(--bg-primary);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 100;
    margin-bottom: var(--spacing-lg);
}

.nav-container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 60px;
}

.nav-logo {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
    align-items: center;
}

.nav-menu a {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.nav-menu a:hover,
.nav-menu a.active {
    background: var(--bg-hover);
    color: var(--primary);
}

/* Mobile Navigation */
.nav-toggle {
    display: none;
    background: none;
    border: none;
    font-size: var(--font-size-2xl);
    cursor: pointer;
    color: var(--text-primary);
}

@media (max-width: 768px) {
    .nav-toggle {
        display: block;
    }

    .nav-menu {
        position: absolute;
        top: 60px;
        left: 0;
        right: 0;
        background: var(--bg-primary);
        flex-direction: column;
        padding: var(--spacing-md);
        box-shadow: var(--shadow-md);
        display: none;
    }

    .nav-menu.active {
        display: flex;
    }
}

/* ===== Header (풀블리드 · 좌측 정렬) ===== */
.main-header {
    width: 100%;
    background: linear-gradient(135deg, #10B981 0%, #047857 100%);
    color: #fff;
    padding: 2.2rem 1rem 1.8rem;
    text-align: left;
    position: relative;
    overflow: hidden;
    margin-bottom: 0;
    box-shadow: none;
    border-radius: 0;
}
.main-header::before {
    content: '';
    position: absolute;
    top: -40%; right: -10%;
    width: 380px; height: 380px;
    background: radial-gradient(circle, rgba(251,191,36,.20), transparent 70%);
    pointer-events: none;
}
.header-inner {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 1rem;
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
}
.header-text { flex: 1; min-width: 0; }

.main-header h1 {
    font-size: 1.65rem;
    color: #fff;
    margin: 0 0 .25rem;
    font-weight: 800;
    letter-spacing: -.3px;
    line-height: 1.25;
}
.main-header h1 a.logo-link { color: #fff; text-decoration: none; display: inline-flex; align-items: center; gap: .5rem; }
.main-header .logo-emoji { font-size: 1.5rem; }

.subtitle {
    font-size: .95rem;
    color: rgba(255,255,255,.85);
    margin: 0;
    font-weight: 400;
    opacity: 1;
}

/* Top AdSense (풀블리드) */
.ad-container.top-ad {
    width: 100%;
    background: #f9fafb;
    padding: 8px 0;
    border-bottom: 1px solid #e5e7eb;
}

@media (max-width: 600px) {
    .header-inner { flex-direction: column; align-items: flex-start; gap: 1rem; }
    .main-header h1 { font-size: 1.4rem; }
}

.btn-share-header {
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: var(--text-white);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    font-size: var(--font-size-base);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.btn-share-header:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}

/* ===== Layout Container ===== */
.layout-container {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: var(--spacing-xl);
    align-items: start;
}

@media (max-width: 1024px) {
    .layout-container {
        grid-template-columns: 1fr;
    }

    .app-sidebar {
        display: none;
    }
}

/* ===== Main Column ===== */
.main-column {
    min-width: 0;
}

/* ===== Card ===== */
.card {
    background: var(--bg-card);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow);
    transition: var(--transition);
}

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

.card h2 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

/* ===== Input Section ===== */
.input-group {
    margin-bottom: var(--spacing-lg);
}

.input-group label {
    display: block;
    font-weight: 500;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.input-group input,
.input-group select {
    width: 100%;
    padding: var(--spacing-md);
    border: 2px solid #e2e8f0;
    border-radius: var(--border-radius);
    font-size: var(--font-size-base);
    font-family: inherit;
    transition: var(--transition);
    background: var(--bg-primary);
}

.input-group input:focus,
.input-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.input-hint {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    margin-top: var(--spacing-xs);
}

.input-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

@media (max-width: 640px) {
    .input-row {
        grid-template-columns: 1fr;
    }
}

/* Question Category Styles */
.question-category {
    background: rgba(255, 255, 255, 0.5);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    margin-bottom: var(--spacing-xl);
    border: 1px solid #e2e8f0;
}

.question-category h3 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid currentColor;
}


/* ===== Buttons ===== */
.btn {
    padding: var(--spacing-md) var(--spacing-xl);
    border: none;
    border-radius: var(--border-radius);
    font-size: var(--font-size-base);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
}

.btn-primary {
    background: var(--primary);
    color: var(--text-white);
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-large {
    width: 100%;
    padding: var(--spacing-lg);
    font-size: var(--font-size-lg);
}

.btn-secondary {
    background: var(--secondary);
    color: var(--text-white);
}

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

.btn-outline {
    background: transparent;
    border: 2px solid var(--primary);
    color: var(--primary);
}

.btn-outline:hover {
    background: var(--primary);
    color: var(--text-white);
}

/* ===== Result Section ===== */
.result-section {
    margin-top: var(--spacing-xl);
}

.result-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--text-white);
    padding: var(--spacing-2xl);
    border-radius: var(--border-radius-xl);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-xl);
}

.result-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.result-header h3 {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.result-tier {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-lg);
    background: rgba(255, 255, 255, 0.2);
    border-radius: var(--border-radius-lg);
    font-size: var(--font-size-lg);
    font-weight: 600;
}

.result-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.result-item {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.result-label {
    font-size: var(--font-size-sm);
    opacity: 0.9;
    margin-bottom: var(--spacing-xs);
}

.result-value {
    font-size: var(--font-size-2xl);
    font-weight: 700;
}

.result-actions {
    display: flex;
    gap: var(--spacing-lg);
    justify-content: center;
    flex-wrap: wrap;
    margin-top: var(--spacing-2xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.2);
}

.result-actions .btn {
    min-width: 180px;
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-base);
}

.result-actions .btn-secondary {
    background: rgba(16, 185, 129, 0.9);
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.result-actions .btn-secondary:hover {
    background: rgba(16, 185, 129, 1);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.4);
}

.result-actions .btn-outline {
    background: rgba(255, 255, 255, 0.15);
    border: 2px solid rgba(255, 255, 255, 0.5);
    color: var(--text-white);
}

.result-actions .btn-outline:hover {
    background: rgba(255, 255, 255, 0.25);
    border-color: rgba(255, 255, 255, 0.8);
    transform: translateY(-2px);
}

/* ===== History Section ===== */
.history-section {
    margin-bottom: var(--spacing-lg);
}

.history-items {
    display: grid;
    gap: var(--spacing-sm);
}

.history-item {
    background: var(--bg-hover);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
}

.history-item:hover {
    background: var(--bg-primary);
    border-color: var(--primary);
    transform: translateX(4px);
}

.history-date {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    margin-bottom: var(--spacing-xs);
}

.history-summary {
    font-weight: 500;
    color: var(--text-primary);
}

/* ===== Info Tables ===== */
.info-table {
    width: 100%;
    border-collapse: collapse;
    margin: var(--spacing-lg) 0;
    background: var(--bg-primary);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.info-table thead {
    background: var(--primary);
    color: var(--text-white);
}

.info-table th,
.info-table td {
    padding: var(--spacing-md);
    text-align: left;
    border-bottom: 1px solid #e2e8f0;
}

.info-table tbody tr:hover {
    background: var(--bg-hover);
}

.info-table tbody tr:last-child td {
    border-bottom: none;
}

.tier-excellent {
    color: var(--secondary);
    font-weight: 600;
}

.tier-good {
    color: var(--primary);
    font-weight: 600;
}

.tier-fair {
    color: var(--warning);
    font-weight: 600;
}

.tier-poor {
    color: var(--danger);
    font-weight: 600;
}

/* ===== FAQ Section ===== */
.faq-section {
    margin-top: var(--spacing-2xl);
}

.faq-item {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-md);
    border: 2px solid #e2e8f0;
    transition: var(--transition);
}

.faq-item:hover {
    border-color: var(--primary);
}

.faq-item summary {
    padding: var(--spacing-lg);
    font-weight: 600;
    cursor: pointer;
    user-select: none;
    list-style: none;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.faq-item summary::-webkit-details-marker {
    display: none;
}

.faq-item summary::before {
    content: '▶';
    transition: var(--transition);
    color: var(--primary);
}

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

.faq-item p {
    padding: 0 var(--spacing-lg) var(--spacing-lg);
    color: var(--text-secondary);
    line-height: 1.8;
}

/* ===== Sidebar ===== */
.app-sidebar {
    position: sticky;
    top: var(--spacing-lg);
    max-height: calc(100vh - var(--spacing-xl));
    overflow-y: auto;

    /* 스크롤바 숨기기 (기능은 유지) */
    scrollbar-width: none;
    /* Firefox */
    -ms-overflow-style: none;
    /* IE/Edge */
}

.app-sidebar::-webkit-scrollbar {
    display: none;
    /* Chrome/Safari */
}

.sidebar-card {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-sm);
}

.sidebar-card h3 {
    font-size: var(--font-size-base);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.sidebar-list {
    list-style: none;
}

.sidebar-list li {
    margin-bottom: var(--spacing-xs);
}

.sidebar-list a {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs);
    color: var(--text-primary);
    text-decoration: none;
    border-radius: var(--border-radius-sm);
    transition: background 0.2s ease;
}

.sidebar-list a:hover {
    background: var(--bg-hover);
}

.link-content {
    flex: 1;
    min-width: 0;
}

.link-title {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: 500;
}

.link-desc {
    display: block;
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 2px;
}

/* ===== AdSense ===== */
.ad-container {
    text-align: center;
    margin: 2rem auto;
    max-width: 1100px;
}

.top-ad {
    margin-bottom: 2rem;
}

.middle-ad {
    margin: 2rem 0;
    clear: both;
    width: 100%;
}

.bottom-ad {
    margin-top: 2rem;
}

/* ===== Footer ===== */
.main-footer {
    text-align: center;
    padding: var(--spacing-2xl) var(--spacing-md);
    color: var(--text-muted);
    margin-top: var(--spacing-2xl);
    border-top: 1px solid #e2e8f0;
}

/* ===== Toast ===== */
.toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--text-primary);
    color: var(--text-white);
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-xl);
    opacity: 0;
    transition: all 0.3s ease;
    z-index: 1000;
    font-weight: 500;
}

.toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* ===== Utility Classes ===== */
.hidden {
    display: none !important;
}

.text-center {
    text-align: center;
}

.mt-1 {
    margin-top: var(--spacing-md);
}

.mt-2 {
    margin-top: var(--spacing-lg);
}

.mb-1 {
    margin-bottom: var(--spacing-md);
}

.mb-2 {
    margin-bottom: var(--spacing-lg);
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .main-header h1 {
        font-size: var(--font-size-3xl);
    }

    .result-grid {
        grid-template-columns: 1fr;
    }

    .result-actions {
        flex-direction: column;
    }

    .result-actions .btn {
        width: 100%;
    }
}

/* ===== Animations ===== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.5s ease;
}

@keyframes slideIn {
    from {
        transform: translateX(-100%);
        opacity: 0;
    }

    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.slide-in {
    animation: slideIn 0.5s ease;
}
/* ===== 중앙 광고 슬롯 시스템 (W35 표준) ===== */
.ad-slot { display: block; width: 100%; border-radius: 12px; overflow: hidden; background: linear-gradient(135deg, #10B981, #047857); color: #fff; position: relative; box-shadow: 0 2px 8px rgba(0,0,0,.08); margin: 12px auto; }
.ad-slot.banner-wide { aspect-ratio: 4/1; max-width: 800px; }
.ad-slot.banner-square { aspect-ratio: 1/1; max-width: 320px; }
.ad-slot .ad-inner { position: absolute; inset: 0; padding: 16px 22px; display: flex; flex-direction: column; justify-content: center; }
.ad-slot.has-image .ad-inner { background: linear-gradient(90deg, rgba(0,0,0,.55), rgba(0,0,0,0)); }
.ad-slot img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; z-index: 0; }
.ad-slot .ad-inner { z-index: 1; }
.ad-slot .ad-label { position: absolute; top: 6px; right: 10px; font-size: 10px; opacity: .8; }
.ad-slot .ad-title { font-size: 18px; font-weight: 800; }
.ad-slot .ad-subtitle { font-size: 13px; opacity: .9; }
.ad-slot .ad-cta { display: inline-block; align-self: flex-start; margin-top: 8px; padding: 6px 14px; background: rgba(255,255,255,.25); border-radius: 20px; font-size: 13px; font-weight: 700; }

.ad-slot.kakao-channel,
.ad-slot[data-ad-type="kakao-channel"] { background: #FEE500; }
.ad-slot.kakao-channel .ad-title,
.ad-slot[data-ad-type="kakao-channel"] .ad-title { color: #3C1E1E; }
.ad-slot.kakao-channel .ad-subtitle,
.ad-slot[data-ad-type="kakao-channel"] .ad-subtitle { color: rgba(60,30,30,.85); }
.ad-slot.kakao-channel .ad-cta,
.ad-slot[data-ad-type="kakao-channel"] .ad-cta { background: #3C1E1E; color: #FEE500; }