/**
 * 메인 페이지 전용 스타일
 * 상속세신고기한 웹사이트
 */

/* ===== 네비게이션 바 ===== */
.navbar {
    background-color: var(--color-primary);
    color: var(--color-text-inverse);
    padding: var(--spacing-md) 0;
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: var(--z-fixed);
}

.navbar-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.navbar-brand {
    font-size: var(--font-xl);
    font-weight: 700;
    color: var(--color-text-inverse);
    text-decoration: none;
}

.navbar-brand:hover {
    color: var(--color-secondary);
}

.navbar-toggle {
    display: flex;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
}

.navbar-toggle span {
    width: 24px;
    height: 2px;
    background-color: var(--color-text-inverse);
    transition: all var(--transition-fast);
}

.navbar-menu {
    display: none;
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    background-color: var(--color-primary);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-lg);
    z-index: var(--z-fixed);
}

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

.navbar-nav {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.navbar-nav a {
    color: var(--color-text-inverse);
    font-weight: 500;
    padding: var(--spacing-sm) 0;
    display: block;
}

.navbar-nav a:hover {
    color: var(--color-secondary);
}

/* ===== 히어로 섹션 ===== */
.hero {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    color: var(--color-text-inverse);
    padding: var(--spacing-3xl) 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        repeating-linear-gradient(
            90deg,
            transparent,
            transparent 50px,
            rgba(255, 255, 255, 0.03) 50px,
            rgba(255, 255, 255, 0.03) 51px
        );
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: var(--font-3xl);
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    color: var(--color-text-inverse);
    line-height: 1.2;
}

.hero-subtitle {
    font-size: var(--font-lg);
    margin-bottom: var(--spacing-xl);
    opacity: 0.9;
}

.hero-cta {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    align-items: center;
}

.hero-cta .btn {
    min-width: 200px;
}

/* ===== 특징 섹션 ===== */
.features {
    padding: var(--spacing-3xl) 0;
    background-color: var(--color-bg-primary);
}

.features-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
    margin-top: var(--spacing-2xl);
}

.feature-card {
    text-align: center;
    padding: var(--spacing-xl);
    background-color: var(--color-bg-secondary);
    border-radius: var(--radius-lg);
    transition: transform var(--transition-base);
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.feature-title {
    font-size: var(--font-xl);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary);
}

.feature-description {
    color: var(--color-text-secondary);
    margin-bottom: 0;
}

/* ===== 퍼포먼스 섹션 ===== */
.performance {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(135deg, #27AE60 0%, #2C3E50 100%);
    color: var(--color-text-inverse);
}

.performance-title {
    text-align: center;
    font-size: var(--font-3xl);
    margin-bottom: var(--spacing-2xl);
    color: var(--color-text-inverse);
}

.performance-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
}

.performance-stat {
    text-align: center;
    padding: var(--spacing-xl);
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(10px);
}

.performance-number {
    font-size: var(--font-4xl);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-inverse);
}

.performance-label {
    font-size: var(--font-lg);
    opacity: 0.9;
}

/* ===== CTA 섹션 ===== */
.cta-section {
    padding: var(--spacing-3xl) 0;
    background-color: var(--color-bg-secondary);
    text-align: center;
}

.cta-title {
    font-size: var(--font-3xl);
    margin-bottom: var(--spacing-md);
}

.cta-description {
    font-size: var(--font-lg);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xl);
}

/* ===== 푸터 ===== */
.footer {
    background-color: var(--color-primary);
    color: var(--color-text-inverse);
    padding: var(--spacing-2xl) 0 var(--spacing-lg);
}

.footer-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-section-title {
    font-size: var(--font-lg);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--color-text-inverse);
}

.footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer-links a {
    color: rgba(255, 255, 255, 0.8);
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--color-secondary);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.6);
}

/* ===== 데스크톱 미디어 쿼리 ===== */
@media (min-width: 768px) {
    .navbar-toggle {
        display: none;
    }

    .navbar-menu {
        display: block;
        position: static;
        padding: 0;
        box-shadow: none;
        background: none;
    }

    .navbar-nav {
        flex-direction: row;
        gap: var(--spacing-xl);
    }

    .hero-title {
        font-size: var(--font-4xl);
    }

    .hero-cta {
        flex-direction: row;
        justify-content: center;
    }

    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .performance-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (min-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .performance-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .footer-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* ===== 애니메이션 ===== */
.fade-in {
    animation: fadeIn 0.6s ease-in-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.slide-up {
    animation: slideUp 0.5s ease-out;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===== D-Day 계산기 미리보기 ===== */
.calculator-preview {
    background: linear-gradient(135deg, #3498DB 0%, #2C3E50 100%);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-xl);
    color: var(--color-text-inverse);
    text-align: center;
    margin: var(--spacing-2xl) 0;
}

.calculator-preview-title {
    font-size: var(--font-2xl);
    margin-bottom: var(--spacing-lg);
    color: var(--color-text-inverse);
}

.dday-display {
    font-size: var(--font-4xl);
    font-weight: 700;
    margin: var(--spacing-lg) 0;
    color: var(--color-warning);
}

.calculator-preview-btn {
    background-color: rgba(255, 255, 255, 0.2);
    border: 2px solid white;
    color: white;
}

.calculator-preview-btn:hover {
    background-color: white;
    color: var(--color-primary);
}