/* Global Styles */
:root {
    --primary-color: #0056b3;
    /* 신뢰감을 주는 네이비 블루 */
    --secondary-color: #f8f9fa;
    --accent-color: #ffc107;
    --text-color: #333;
    --light-text: #666;
    --border-color: #ddd;
    --background-color: #ffffff;
    --success-color: #28a745;
    --warning-color: #ffc107;
    --danger-color: #dc3545;
    --card-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --container-width: 1140px;
    /* 통합 지침에 따름 */
    --header-height: 60px;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
}

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

/* Header */
.logo-link {
    text-decoration: none;
    color: inherit;
    cursor: pointer;
}

.main-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid var(--border-color);
}

.main-header h1 {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-xs);
}

.subtitle {
    font-size: 1.1rem;
    color: var(--light-text);
}

/* Layout */
.layout-container {
    display: flex;
    gap: 2rem;
    align-items: flex-start;
}

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

.app-sidebar {
    flex: 1;
    min-width: 280px;
    position: sticky;
    top: 2rem;
}

/* Cards */
section,
.banner-card {
    background: #fff;
    border-radius: 12px;
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    box-shadow: var(--card-shadow);
    border: 1px solid var(--border-color);
}

h2 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
    color: var(--text-color);
    border-left: 5px solid var(--primary-color);
    padding-left: 10px;
}

/* Form Elements */
.form-group {
    margin-bottom: var(--spacing-md);
}

label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
}

input[type="number"],
input[type="text"] {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s;
}

input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.input-wrapper {
    position: relative;
}

.unit {
    position: absolute;
    right: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--light-text);
}

.helper-text {
    display: block;
    margin-top: 5px;
    color: var(--light-text);
    font-size: 0.85rem;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 700;
    text-align: center;
    transition: background-color 0.3s, transform 0.1s;
    text-decoration: none;
}

.btn-primary {
    background-color: var(--primary-color);
    color: #fff;
    width: 100%;
}

.btn-primary:hover {
    background-color: #004494;
}

.btn-secondary {
    background-color: var(--secondary-color);
    color: var(--text-color);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background-color: #e2e6ea;
}

.btn-share {
    background-color: #28a745;
    /* Kakao Green or similar */
    color: white;
    width: 100%;
}

.btn-share-header {
    background-color: var(--secondary-color);
    color: var(--text-color);
    font-size: 0.9rem;
    padding: 8px 16px;
    margin-top: 10px;
}

/* Result Section */
.result-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.result-item {
    background: var(--secondary-color);
    padding: var(--spacing-md);
    border-radius: 10px;
    text-align: center;
}

.result-item.highlight {
    background: #e3f2fd;
    /* Light Blue */
    border: 1px solid #bbdefb;
}

.result-item h3 {
    font-size: 1rem;
    color: var(--light-text);
    margin-bottom: 10px;
}

.amount-wrapper {
    font-size: 1.8rem;
    font-weight: 900;
    color: var(--primary-color);
}

.plus-sign {
    color: var(--danger-color);
    font-size: 1.5rem;
}

.desc {
    font-size: 0.9rem;
    color: var(--light-text);
    margin-top: 5px;
}

.chart-container {
    position: relative;
    height: 300px;
    margin-bottom: var(--spacing-lg);
}

.info-box {
    background: #fff3cd;
    /* Warning Light Yellow */
    border: 1px solid #ffeeba;
    padding: var(--spacing-md);
    border-radius: 8px;
    margin-bottom: var(--spacing-md);
}

.info-box h4 {
    margin-bottom: 10px;
    color: #856404;
}

.info-box ul {
    list-style-type: disc;
    padding-left: 20px;
    color: #856404;
}

/* Banner */
.banner-card {
    background-color: #e8f5e9;
    /* Green shade */
    border: 1px solid #c8e6c9;
    text-align: center;
}

.banner-text {
    font-size: 1.1rem;
    color: #2e7d32;
    line-height: 1.5;
}

/* Footer */
.main-footer {
    text-align: center;
    padding: var(--spacing-lg) 0;
    color: var(--light-text);
    font-size: 0.9rem;
    border-top: 1px solid var(--border-color);
    margin-top: var(--spacing-lg);
}

/* Ads */
.ad-container {
    margin: var(--spacing-md) auto;
    min-height: 100px;
    text-align: center;
    overflow: hidden;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
}

/* Toast */
.toast {
    visibility: hidden;
    min-width: 250px;
    background-color: #333;
    color: #fff;
    text-align: center;
    border-radius: 4px;
    padding: 16px;
    position: fixed;
    z-index: 1;
    left: 50%;
    bottom: 30px;
    transform: translateX(-50%);
    font-size: 17px;
}

.toast.show {
    visibility: visible;
    animation: fadein 0.5s, fadeout 0.5s 2.5s;
}

@keyframes fadein {
    from {
        bottom: 0;
        opacity: 0;
    }

    to {
        bottom: 30px;
        opacity: 1;
    }
}

@keyframes fadeout {
    from {
        bottom: 30px;
        opacity: 1;
    }

    to {
        bottom: 0;
        opacity: 0;
    }
}

/* Sidebar Styles (Control Tower Compatibility) */
.sidebar-card {
    background: #fff;
    border-radius: 12px;
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    box-shadow: var(--card-shadow);
    border: 1px solid var(--border-color);
}

.sidebar-card h3 {
    font-size: 1.1rem;
    margin-bottom: 12px;
    border-left: 4px solid var(--primary-color);
    padding-left: 8px;
    color: var(--text-color);
}

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

.sidebar-list li {
    margin-bottom: 10px;
}

.sidebar-list a {
    display: flex;
    align-items: flex-start;
    text-decoration: none;
    color: var(--text-color);
    padding: 8px;
    border-radius: 6px;
    transition: background-color 0.2s;
}

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

.link-icon {
    margin-right: 8px;
    font-size: 1.1rem;
}

.link-content {
    flex: 1;
}

.link-title {
    display: block;
    font-weight: 500;
    font-size: 0.95rem;
    margin-bottom: 2px;
    color: var(--primary-color);
}

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

/* Result Actions (2 columns) */
.result-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin-top: var(--spacing-lg);
}

/* Mobile Responsive Adjustments */
@media (max-width: 768px) {
    .layout-container {
        flex-direction: column;
    }

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

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

    .main-header h1 {
        font-size: 1.5rem;
    }

    .app-sidebar {
        margin-top: var(--spacing-lg);
    }
}

/* FAQ Styles */
.faq-section {
    margin-top: var(--spacing-lg);
    background: #fff;
    border-radius: 12px;
    padding: var(--spacing-md);
    box-shadow: var(--card-shadow);
    border: 1px solid var(--border-color);
}

.faq-item {
    border-bottom: 1px solid #eee;
    padding: 1rem 0;
}

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

.faq-item summary {
    font-weight: 600;
    cursor: pointer;
    list-style: none;
    /* Remove default triangle */
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-color);
}

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

.faq-item summary::after {
    content: '+';
    font-size: 1.2rem;
    font-weight: bold;
    color: var(--primary-color);
    transition: transform 0.2s;
}

.faq-item[open] summary::after {
    transform: rotate(45deg);
}

.faq-item p {
    margin-top: 0.8rem;
    color: #555;
    font-size: 0.95rem;
    line-height: 1.6;
    padding: 0.5rem;
    background-color: #f9fafb;
    border-radius: 6px;
}