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

:root {
    /* Color Palette */
    --primary-color: #2C3E50;
    --secondary-color: #16A085;
    --accent-color: #E67E22;
    --success-color: #27AE60;
    --warning-color: #F39C12;
    --danger-color: #E74C3C;
    --light-bg: #ECF0F1;
    --white: #FFFFFF;
    --text-dark: #2C3E50;
    --text-light: #7F8C8D;
    --border-color: #BDC3C7;

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

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;

    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.2);

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
}

body {
    font-family: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background: linear-gradient(180deg, #eff6ff 0%, #dbeafe 100%);
    min-height: 100vh;
    padding: 0;
}

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

/* ===== Header (풀블리드 · 좌측 정렬) ===== */
.main-header {
    width: 100%;
    background: linear-gradient(135deg, #1E40AF 0%, #1E3A8A 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;
    max-width: none;
}
.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; }

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

.main-header .btn-share-header {
    background: rgba(255,255,255,.15);
    color: #fff;
    border: 1px solid rgba(255,255,255,.25);
    backdrop-filter: blur(4px);
    padding: .55rem 1rem;
    font-size: .9rem;
    font-weight: 600;
    border-radius: 999px;
    flex-shrink: 0;
    margin: 0;
}
.main-header .btn-share-header:hover { background: rgba(255,255,255,.28); transform: translateY(-1px); }

/* 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; }
    .main-header .btn-share-header { align-self: stretch; text-align: center; }
}

/* ===== Buttons ===== */
.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-normal);
    font-family: inherit;
}

.btn-primary {
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
    color: var(--white);
    width: 100%;
    padding: 1rem;
    font-size: 1.1rem;
    font-weight: 600;
    margin-top: var(--spacing-md);
}

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

.btn-secondary {
    background: var(--light-bg);
    color: var(--text-dark);
}

.btn-secondary:hover {
    background: #D5DBDB;
}

.btn-small {
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
    margin-top: var(--spacing-sm);
    display: inline-block;
}

.btn-share-header,
.btn-share-result {
    background: var(--accent-color);
    color: var(--white);
}

.btn-share-header:hover,
.btn-share-result:hover {
    background: #D35400;
}

.button-group {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.button-group .btn {
    flex: 1;
}

/* ===== Layout ===== */
.layout-container {
    display: flex;
    gap: var(--spacing-lg);
    max-width: 1100px;
    margin: 0 auto;
}

.main-column {
    flex: 3;
    min-width: 0;
}

.app-sidebar {
    flex: 1;
    min-width: 280px;
    position: sticky;
    top: 1.5rem;
    align-self: flex-start;
    max-height: calc(100vh - 3rem);
    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 */
}

/* ===== Ad Containers ===== */
.ad-container {
    text-align: center;
    margin: var(--spacing-lg) auto;
    max-width: 1100px;
}

.top-ad {
    margin-bottom: var(--spacing-lg);
}

.middle-ad {
    margin: var(--spacing-lg) 0;
    clear: both;
    width: 100%;
    max-width: 100%;
}

.bottom-ad {
    margin-top: var(--spacing-lg);
}

/* ===== Calculator Section ===== */
.calculator-section {
    background: var(--white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    margin-bottom: var(--spacing-lg);
    max-width: 1100px;
    margin-left: auto;
    margin-right: auto;
}

.calculator-section h2 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
    font-size: 1.5rem;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    font-weight: 500;
    color: var(--text-dark);
    margin-bottom: var(--spacing-xs);
    font-size: 0.9rem;
}

.form-group input[type="number"],
.form-group input[type="date"] {
    padding: 0.75rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-family: inherit;
    transition: border-color var(--transition-fast);
}

.form-group input:focus {
    outline: none;
    border-color: var(--secondary-color);
}

.input-hint {
    font-size: 0.85rem;
    color: var(--text-light);
    margin-top: var(--spacing-xs);
}

.work-period-display,
.average-wage-display {
    padding: 0.75rem;
    background: var(--light-bg);
    border-radius: var(--radius-sm);
    text-align: center;
    font-weight: 600;
    color: var(--secondary-color);
    font-size: 1.1rem;
    min-height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* ===== Result Section ===== */
.result-section {
    background: var(--white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    margin-bottom: var(--spacing-lg);
    max-width: 1100px;
    margin-left: auto;
    margin-right: auto;
}

.result-section h2 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
    font-size: 1.5rem;
}

.result-summary {
    margin-bottom: var(--spacing-lg);
}

.result-card {
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    text-align: center;
    color: var(--white);
}

.result-card h3 {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-sm);
    opacity: 0.9;
}

.result-card .amount {
    font-size: 2.5rem;
    font-weight: 700;
    margin: var(--spacing-sm) 0;
}

.result-card .description {
    font-size: 0.95rem;
    opacity: 0.85;
}

.result-details {
    background: var(--light-bg);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
}

.detail-item {
    display: flex;
    justify-content: space-between;
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--border-color);
}

.detail-item:last-child {
    border-bottom: none;
}

.detail-item .label {
    color: var(--text-light);
    font-weight: 500;
}

.detail-item .value {
    color: var(--text-dark);
    font-weight: 600;
}

.detail-item .formula {
    font-size: 0.9rem;
    text-align: right;
}

/* ===== Simulation Section ===== */
.simulation-section {
    margin-top: var(--spacing-lg);
}

.simulation-section h3 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
    font-size: 1.3rem;
}

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

.simulation-card {
    background: var(--light-bg);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    text-align: center;
    border: 2px solid var(--border-color);
    transition: all var(--transition-normal);
}

.simulation-card:hover {
    border-color: var(--secondary-color);
    transform: translateY(-4px);
    box-shadow: var(--shadow-sm);
}

.simulation-card h4 {
    color: var(--text-dark);
    margin-bottom: var(--spacing-sm);
    font-size: 1rem;
}

.simulation-card .sim-amount {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--secondary-color);
}

/* ===== History Section ===== */
.history-section {
    background: var(--white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    margin-bottom: var(--spacing-lg);
    max-width: 1100px;
    margin-left: auto;
    margin-right: auto;
}

.history-section h2 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
    font-size: 1.5rem;
}

.history-items {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.history-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    background: var(--light-bg);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-normal);
    border-left: 4px solid var(--secondary-color);
}

.history-item:hover {
    background: #dfe6e9;
    transform: translateX(4px);
    box-shadow: var(--shadow-sm);
}

.history-info {
    flex: 1;
}

.history-label {
    font-size: 0.9rem;
    color: var(--text-light);
    margin-bottom: 0.25rem;
}

.history-value {
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 0.25rem;
}

.history-delete {
    padding: 0.5rem 0.75rem;
    background: transparent;
    border: none;
    color: var(--text-light);
    cursor: pointer;
    font-size: 1.5rem;
    transition: color var(--transition-fast);
    line-height: 1;
}

.history-delete:hover {
    color: var(--danger-color);
}

/* ===== Info Section ===== */
.info-section {
    background: var(--white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    margin-bottom: var(--spacing-lg);
    max-width: 1100px;
    margin-left: auto;
    margin-right: auto;
}

.info-section h2 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
    font-size: 1.5rem;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.info-card {
    background: var(--light-bg);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--secondary-color);
}

.info-card h3 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
    font-size: 1.1rem;
}

.info-card p {
    color: var(--text-dark);
    margin-bottom: var(--spacing-sm);
    line-height: 1.7;
}

.info-card ul {
    list-style-position: inside;
    color: var(--text-dark);
}

.info-card li {
    margin-bottom: var(--spacing-xs);
    line-height: 1.6;
}

.info-card .formula-detail {
    font-size: 0.95rem;
    color: var(--text-light);
    font-style: italic;
}

.info-card .note {
    font-size: 0.9rem;
    color: var(--warning-color);
    font-weight: 500;
}

/* ===== FAQ Section ===== */
.faq-section {
    background: var(--white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    margin-bottom: var(--spacing-lg);
    max-width: 1100px;
    margin-left: auto;
    margin-right: auto;
}

.faq-section h2 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
    font-size: 1.5rem;
}

.faq-item {
    background: var(--light-bg);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-sm);
    border: 2px solid var(--border-color);
    transition: all var(--transition-normal);
}

.faq-item:hover {
    border-color: var(--secondary-color);
    box-shadow: var(--shadow-sm);
}

.faq-item summary {
    padding: var(--spacing-md);
    cursor: pointer;
    font-weight: 600;
    color: var(--text-dark);
    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: "▶";
    font-size: 0.8rem;
    color: var(--secondary-color);
    transition: transform var(--transition-fast);
}

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

.faq-item p {
    padding: 0 var(--spacing-md) var(--spacing-md) var(--spacing-md);
    color: var(--text-dark);
    line-height: 1.7;
    font-size: 0.95rem;
}

/* ===== Footer ===== */
.main-footer {
    background: var(--white);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    text-align: center;
    margin: var(--spacing-lg) auto;
    max-width: 1100px;
    color: var(--text-light);
}

/* ===== Toast Notification ===== */
.toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--text-dark);
    color: var(--white);
    padding: 1rem 2rem;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    transition: all var(--transition-normal);
    z-index: 1000;
}

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

/* ===== Responsive Design ===== */
@media (max-width: 900px) {
    .layout-container {
        flex-direction: column;
    }

    .main-column,
    .app-sidebar {
        width: 100%;
        flex: none;
    }

    .app-sidebar {
        margin-top: 2rem;
        position: static;
        max-height: none;
    }

    .floating-btn {
        bottom: 1.5rem;
        right: 1.5rem;
        width: 50px;
        height: 50px;
        font-size: 1.3rem;
    }
}

@media (max-width: 768px) {
    .main-header h1 {
        font-size: 1.5rem;
    }

    .main-header .subtitle {
        font-size: 1rem;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .result-card .amount {
        font-size: 2rem;
    }

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

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

    .button-group {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    body {
        padding: 0.5rem;
    }

    .main-header,
    .calculator-section,
    .result-section,
    .history-section,
    .info-section,
    .faq-section {
        padding: var(--spacing-md);
    }
}

/* ===== Standardized Sidebar & Layout ===== */
.sidebar-card {
    background: var(--white);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
}

.sidebar-card h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-dark);
    border-left: 4px solid var(--secondary-color);
    padding-left: var(--spacing-xs);
}

.sidebar-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

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

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

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

.link-icon {
    font-size: 1.1rem;
    flex-shrink: 0;
}

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

.link-title {
    display: block;
    font-weight: 500;
    font-size: 0.9rem;
    margin-bottom: 2px;
    color: var(--text-dark);
}

.link-desc {
    display: block;
    font-size: 0.8rem;
    color: var(--text-light);
    line-height: 1.4;
}

/* ===== Floating Button ===== */
.floating-btn {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
    color: var(--white);
    border: none;
    border-radius: 50%;
    box-shadow: var(--shadow-lg);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    transition: all var(--transition-normal);
    z-index: 999;
}

.floating-btn:hover {
    transform: translateY(-4px) scale(1.05);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.25);
}

.floating-btn:active {
    transform: translateY(-2px) scale(1.02);
}

/* ===== New Features: Pension & Tax ===== */
.pension-card,
.tax-card {
    margin-top: var(--spacing-lg);
    border: none;
    background: var(--white);
    box-shadow: var(--shadow-md);
    border-radius: var(--radius-md);
    overflow: hidden;
    /* For header background */
}

/* Card Headers */
.pension-card h3,
.tax-card h3 {
    background: linear-gradient(to right, #f8f9fa, #ffffff);
    padding: var(--spacing-md);
    margin: 0;
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--primary-color);
    border-bottom: 2px solid var(--light-bg);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.pension-card h3 i,
.tax-card h3 i {
    color: var(--secondary-color);
    font-size: 1.3rem;
}

.section-desc {
    padding: var(--spacing-md) var(--spacing-md) 0;
    color: var(--text-light);
    margin-bottom: var(--spacing-sm);
    font-size: 0.95rem;
}

.section-desc-small {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-sm);
    margin-top: -0.5rem;
}

/* Promo Card */
.promo-card {
    margin-top: var(--spacing-lg);
    background: linear-gradient(135deg, #1e3a8a 0%, #16A085 100%);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    color: var(--white);
    box-shadow: var(--shadow-md);
    border: none;
}

.promo-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-md);
}

.promo-text h3 {
    font-size: 1.2rem;
    margin-bottom: 0.25rem;
    color: var(--white);
    background: none;
    border: none;
    padding: 0;
}

.promo-text p {
    font-size: 0.95rem;
    opacity: 0.9;
    margin: 0;
}

.btn-promo {
    background: var(--white);
    color: var(--primary-color);
    padding: 0.75rem 1.25rem;
    border-radius: 50px;
    font-weight: 600;
    text-decoration: none;
    white-space: nowrap;
    transition: all var(--transition-normal);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.btn-promo:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.2);
    background: #f8f9fa;
}

@media (max-width: 600px) {
    .promo-content {
        flex-direction: column;
        text-align: center;
    }

    .btn-promo {
        width: 100%;
        justify-content: center;
    }
}

/* Simulation Inputs */
.simulation-inputs {
    display: flex;
    gap: var(--spacing-md);
    padding: 0 var(--spacing-md) var(--spacing-md);
    margin-bottom: 0;
}

.sim-input-group {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.sim-input-group label {
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.form-select {
    padding: 0.8rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 1rem;
    background-color: var(--white);
    width: 100%;
    transition: all var(--transition-fast);
    cursor: pointer;
}

.form-select:hover,
.form-select:focus {
    border-color: var(--secondary-color);
    outline: none;
}

.input-with-unit {
    position: relative;
    display: flex;
    align-items: center;
}

.input-with-unit input {
    width: 100%;
    padding: 0.8rem;
    padding-right: 2.5rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-dark);
    transition: all var(--transition-fast);
}

.input-with-unit input:hover,
.input-with-unit input:focus {
    border-color: var(--secondary-color);
    outline: none;
}

.input-with-unit .unit {
    position: absolute;
    right: 1rem;
    color: var(--text-light);
    font-weight: 500;
    pointer-events: none;
}

/* Pension Result Box */
.pension-result-box {
    background: linear-gradient(135deg, #e0f7fa 0%, #e8f5e9 100%);
    margin: var(--spacing-md);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    border: 1px solid rgba(22, 160, 133, 0.2);
}

.pension-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.pension-row.sub {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px dashed rgba(0, 0, 0, 0.1);
    margin-bottom: 0;
}

.p-label {
    font-weight: 600;
    color: var(--text-dark);
    font-size: 1rem;
}

.p-value {
    font-weight: 700;
    font-size: 1.2rem;
    color: var(--text-dark);
}

.p-value.highlight {
    color: var(--secondary-color);
    font-size: 1.6rem;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

/* Tax Guide */
.tax-comparison-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
    padding: 0 var(--spacing-md) var(--spacing-md);
}

.tax-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--spacing-md);
    background: #f8f9fa;
    border-radius: var(--radius-md);
    text-align: center;
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

.tax-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.tax-item.highlight-bg {
    background: #e3f2fd;
    /* Light blue tint */
    border: 1px solid #2196f3;
}

.t-label {
    font-size: 0.95rem;
    color: var(--text-light);
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.t-value {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--text-dark);
    margin-bottom: 0.5rem;
}

.t-desc {
    font-size: 0.85rem;
    color: var(--text-light);
}

.text-blue {
    color: #1976d2;
}

.tax-saving-banner {
    background: linear-gradient(135deg, #fff3cd 0%, #fff8e1 100%);
    color: #856404;
    padding: var(--spacing-md);
    margin: 0 var(--spacing-md) var(--spacing-md);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    font-weight: 600;
    border: 1px solid #ffeeba;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.tax-saving-banner i {
    font-size: 1.2rem;
    color: #f39c12;
}

.tax-tips {
    background: #f8f9fa;
    padding: var(--spacing-md);
    margin: 0 var(--spacing-md) var(--spacing-md);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--secondary-color);
}

.tax-tips h4 {
    font-size: 1rem;
    margin-bottom: var(--spacing-sm);
    color: var(--primary-color);
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.tax-tips ul {
    list-style: none;
    padding-left: 0;
    margin-bottom: 0;
}

.tax-tips li {
    position: relative;
    padding-left: 1.5rem;
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
    color: var(--text-dark);
}

.tax-tips li:last-child {
    margin-bottom: 0;
}

.tax-tips li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--success-color);
    font-weight: 800;
}

@media (max-width: 768px) {
    .simulation-inputs {
        flex-direction: column;
    }

    .tax-comparison-grid {
        grid-template-columns: 1fr;
    }
}

.floating-btn:hover {
    transform: translateY(-4px) scale(1.05);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.25);
}

.floating-btn:active {
    transform: translateY(-2px) scale(1.02);
}
/* ===== 중앙 광고 슬롯 시스템 (W35 표준 · navy) ===== */
.ad-slot { display: block; width: 100%; border-radius: 12px; overflow: hidden; background: linear-gradient(135deg, #1E40AF, #1E3A8A); 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; z-index: 1; }
.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-label { position: absolute; top: 6px; right: 10px; font-size: 10px; opacity: .8; z-index: 2; }
.ad-slot .ad-title { font-size: 18px; font-weight: 800; line-height: 1.3; }
.ad-slot .ad-subtitle { font-size: 13px; opacity: .9; line-height: 1.4; }
.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; }

/* ===== 리마스터 콘텐츠 섹션 (related-grid · bracket-table · faq-section) ===== */
.related-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 12px; margin: 16px 0; }
.related-link { display: flex; gap: 12px; padding: 14px; background: #fff; border: 1px solid #e5e7eb; border-radius: 12px; text-decoration: none; color: inherit; transition: box-shadow .15s, transform .15s; }
.related-link:hover { box-shadow: 0 6px 18px rgba(0,0,0,.08); transform: translateY(-1px); border-color: #1E40AF; }
.rel-emoji { font-size: 28px; flex-shrink: 0; }
.rel-body { flex: 1; min-width: 0; }
.rel-title { font-size: 14.5px; font-weight: 700; color: #1E3A8A; margin-bottom: 2px; }
.rel-desc { font-size: 12.5px; color: #64748b; line-height: 1.4; }

.bracket-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.bracket-table th { background: #1E40AF; color: #fff; padding: 10px 12px; text-align: left; font-weight: 700; }
.bracket-table td { padding: 10px 12px; border-bottom: 1px solid #e5e7eb; }
.bracket-table tr:hover { background: #f8fafc; }
.bracket-table .amt { font-weight: 700; color: #1E40AF; }
.bracket-note { background: #eff6ff; border-left: 3px solid #1E40AF; padding: 12px 14px; margin: 12px 0; font-size: 13.5px; color: #1E3A8A; border-radius: 0 8px 8px 0; }
.table-scroll { overflow-x: auto; }

/* faq-section 은 기존 정의 사용 (덮어쓰지 않음) */

/* ul 글머리 점 padding 보강 */
.calculator-section ul,
.info-section ul,
.faq-section ul { padding-left: 1.5rem; list-style: disc; margin: 12px 0; }
.calculator-section ul li,
.info-section ul li,
.faq-section ul li { margin-bottom: 8px; line-height: 1.8; color: #334155; }
.calculator-section ul li::marker { color: #1E40AF; }

/* ===== Scenario Grid (W11 패턴) ===== */
.scenario-section { background: #fff; padding: var(--spacing-lg); border-radius: var(--radius-lg); box-shadow: var(--shadow-md); margin-bottom: var(--spacing-lg); }
.scenario-section h2 { color: #1E3A8A; margin-bottom: 8px; font-size: 1.5rem; }
.scenario-section .section-intro { color: #64748b; margin-bottom: 1rem; font-size: 14px; }
.scenario-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 12px; }
.scenario-card { display: block; padding: 14px 16px; background: linear-gradient(135deg, #eff6ff, #dbeafe); border: 1px solid #bfdbfe; border-radius: 12px; text-decoration: none; color: inherit; transition: transform .15s, box-shadow .15s; }
.scenario-card:hover { transform: translateY(-2px); box-shadow: 0 6px 18px rgba(30,64,175,.15); border-color: #1E40AF; }
.scenario-head { font-weight: 800; color: #1E3A8A; font-size: 15px; }
.scenario-sub { font-size: 13px; color: #475569; margin-top: 2px; }
.scenario-note { font-size: 12px; color: #64748b; margin-top: 4px; }

/* ===== Popular Grid (인기 검색 키워드 30+) ===== */
.popular-section { background: #fff; padding: var(--spacing-lg); border-radius: var(--radius-lg); box-shadow: var(--shadow-md); margin-bottom: var(--spacing-lg); }
.popular-section h2 { color: #1E3A8A; margin-bottom: 8px; font-size: 1.5rem; }
.popular-section .section-intro { color: #64748b; margin-bottom: 1rem; font-size: 14px; }
.popular-grid { display: flex; flex-wrap: wrap; gap: 8px; }
.popular-tag { display: inline-flex; align-items: center; padding: 6px 12px; background: #f1f5f9; border: 1px solid #e2e8f0; border-radius: 999px; font-size: 13px; color: #1E3A8A; text-decoration: none; transition: all .15s; }
.popular-tag:hover { background: #1E40AF; color: #fff; border-color: #1E40AF; }

/* ===== Info Grid (정부 사이트) ===== */
.info-grid-link { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 10px; }
.gov-link { display: flex; align-items: center; gap: 10px; padding: 12px 14px; background: #f8fafc; border: 1px solid #e2e8f0; border-radius: 10px; text-decoration: none; color: #1E3A8A; font-size: 14px; transition: all .15s; }
.gov-link:hover { background: #eff6ff; border-color: #1E40AF; }
.gov-emoji { font-size: 22px; }