:root {
    /* Color Palette */
    --color-primary: #0F172A;
    /* Deep Blue: Trust, Professional */
    --color-primary-light: #1E293B;
    --color-accent: #10B981;
    /* Mint Green: Clean, Fresh */
    --color-accent-dark: #059669;
    --color-text-main: #1F2937;
    /* Dark Grey for text */
    --color-text-light: #6B7280;
    /* Light Grey for subtitles */
    --color-bg: #F8FAFC;
    /* Off-white background */
    --color-white: #FFFFFF;
    --color-border: #E2E8F0;

    /* Spacing */
    --spacing-xs: 0.5rem;
    /* 8px */
    --spacing-sm: 1rem;
    /* 16px */
    --spacing-md: 1.5rem;
    /* 24px */
    --spacing-lg: 3rem;
    /* 48px */
    --spacing-xl: 5rem;
    /* 80px */

    /* Layout */
    --container-width: 1200px;
    --header-height: 70px;
    --border-radius: 12px;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --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);

    /* Fonts */
    --font-main: 'Noto Sans KR', sans-serif;
    /* Fallback to Noto if Pretendard fails, but generally safe */
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    color: var(--color-text-main);
    background-color: var(--color-bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    display: block;
}

/* Typography */
h1,
h2,
h3,
h4 {
    font-weight: 700;
    line-height: 1.3;
    word-break: keep-all;
    /* Prevents awkward word breaks in Korean */
}

p,
li,
span {
    word-break: keep-all;
    /* Generally cleaner for Korean short text */
    overflow-wrap: break-word;
}

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

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

.section {
    padding: var(--spacing-xl) 0;
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--spacing-lg);
}

.section-title {
    font-size: 2.25rem;
    margin-bottom: var(--spacing-xs);
    color: var(--color-primary);
}

.section-desc {
    color: var(--color-text-light);
    font-size: 1.125rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
    border: none;
    transition: all 0.2s ease;
}

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

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

.btn-lg {
    padding: 1rem 2.5rem;
    font-size: 1.125rem;
}

.btn-block {
    width: 100%;
}

/* Header */
.header {
    height: var(--header-height);
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--color-border);
    transition: all 0.3s ease;
}

.header.scrolled {
    box-shadow: var(--shadow-sm);
}

.header-container {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo i {
    color: var(--color-accent);
}

.nav-list {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-list a {
    font-weight: 500;
    color: var(--color-primary-light);
}

.nav-list a:hover {
    color: var(--color-accent);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--color-primary);
}

/* Hero Section */
.hero {
    position: relative;
    height: 100vh;
    /* Full viewport height */
    min-height: 600px;
    display: flex;
    align-items: center;
    padding-top: var(--header-height);
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

.hero-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to right, rgba(15, 23, 42, 0.9) 0%, rgba(15, 23, 42, 0.6) 100%);
}

.hero-content {
    position: relative;
    color: var(--color-white);
    max-width: 800px;
}

.hero-title {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: #E2E8F0;
    margin-bottom: 2.5rem;
    font-weight: 300;
}

.hero-cta {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.trust-badge {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 500;
    color: var(--color-accent);
    background: rgba(255, 255, 255, 0.1);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

/* Features */
.features {
    background-color: var(--color-white);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: var(--color-bg);
    padding: 2.5rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--color-border);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-accent);
}

.feature-card .icon-box {
    width: 60px;
    height: 60px;
    background: rgba(16, 185, 129, 0.1);
    /* Mint specific light bg */
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--color-accent);
    margin-bottom: 1.5rem;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--color-primary);
}

.feature-card p {
    color: var(--color-text-light);
    margin-bottom: 1.5rem;
}

.feature-list li {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
    font-weight: 500;
    color: var(--color-primary-light);
}

.feature-list li i {
    color: var(--color-accent);
    font-size: 1.2rem;
}

/* Trust Signals */
.trust-signals {
    background-color: var(--color-primary);
    color: var(--color-white);
    padding: 4rem 0;
}

.trust-grid {
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
    gap: 2rem;
}

.trust-item {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.trust-item i {
    font-size: 3rem;
    color: var(--color-accent);
}

.trust-item h3 {
    font-size: 1.25rem;
    margin-bottom: 0.25rem;
}

.trust-item p {
    color: #94A3B8;
    font-size: 0.9rem;
}

/* Reviews */
.reviews-slider-container {
    overflow-x: auto;
    padding: 1rem 0 2rem 0;
    /* Hide scrollbar but keep functionality */
    -ms-overflow-style: none;
    /* IE and Edge */
    scrollbar-width: none;
    /* Firefox */
}

.reviews-slider-container::-webkit-scrollbar {
    display: none;
}

.reviews-slider {
    display: flex;
    gap: 2rem;
    width: fit-content;
    padding: 0 1rem;
}

.review-card {
    background: var(--color-white);
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
    min-width: 350px;
    max-width: 350px;
    border: 1px solid var(--color-border);
}

.review-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.stars {
    color: #F59E0B;
    /* Amber for stars */
}

.review-date {
    font-size: 0.875rem;
    color: #9CA3AF;
}

.review-text {
    font-style: italic;
    color: var(--color-primary-light);
    margin-bottom: 1.5rem;
    min-height: 80px;
}

.review-author {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--color-border);
}

.author-img {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    object-fit: cover;
}

.author-info strong {
    display: block;
    color: var(--color-primary);
}

.author-info span {
    font-size: 0.875rem;
    color: var(--color-text-light);
}

/* Pricing */
.pricing {
    background-color: var(--color-white);
}

.pricing-table-wrapper {
    overflow-x: auto;
}

.pricing-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--color-white);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    min-width: 600px;
    /* Force scroll on very small screens */
}

.pricing-table th,
.pricing-table td {
    padding: 1.5rem;
    text-align: center;
    border: 1px solid var(--color-border);
}

.pricing-table th {
    background-color: var(--color-primary);
    color: var(--color-white);
    font-weight: 600;
}

.pricing-table tr:nth-child(even) {
    background-color: var(--color-bg);
}

.highlight-cell {
    color: var(--color-accent-dark);
    font-weight: 700;
}

.pricing-note {
    margin-top: 1rem;
    font-size: 0.9rem;
    color: var(--color-text-light);
    text-align: right;
}

/* FAQ */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    border-bottom: 1px solid var(--color-border);
}

.faq-question {
    width: 100%;
    padding: 1.5rem 0;
    background: none;
    border: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-primary);
    cursor: pointer;
    text-align: left;
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-item.active .faq-answer {
    max-height: 200px;
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
}

.faq-answer p {
    padding-bottom: 1.5rem;
    color: var(--color-text-light);
}

/* Footer & Contact */
.footer {
    background-color: var(--color-primary);
    color: #94A3B8;
    padding-top: 5rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    margin-bottom: 4rem;
}

.footer-logo {
    color: var(--color-white);
    margin-bottom: 1.5rem;
}

.footer-desc {
    margin-bottom: 2rem;
    line-height: 1.8;
}

.contact-info p {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
}

.footer-form-wrapper {
    background: var(--color-white);
    padding: 2.5rem;
    border-radius: var(--border-radius);
    color: var(--color-text-main);
}

.footer-form-wrapper h3 {
    color: var(--color-primary);
    margin-bottom: 0.5rem;
}

.footer-form-wrapper p {
    color: var(--color-text-light);
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
}

.contact-form input,
.contact-form select {
    width: 100%;
    padding: 0.875rem;
    margin-bottom: 1rem;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    font-family: inherit;
    font-size: 1rem;
}

.contact-form input:focus,
.contact-form select:focus {
    outline: none;
    border-color: var(--color-accent);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: 2rem 0;
}

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

.social-links {
    display: flex;
    gap: 1.5rem;
}

.social-links a {
    color: #94A3B8;
    font-size: 1.5rem;
}

.social-links a:hover {
    color: var(--color-white);
}

/* Mobile Menu Overlay */
.mobile-menu-overlay {
    position: fixed;
    top: 0;
    right: -100%;
    /* Hidden off-screen */
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 2000;
    transition: right 0.3s ease;
    display: flex;
    justify-content: flex-end;
}

.mobile-menu-overlay.active {
    right: 0;
}

.mobile-menu {
    width: 80%;
    max-width: 300px;
    height: 100%;
    background: var(--color-white);
    padding: 2rem;
    position: relative;
    display: flex;
    flex-direction: column;
}

.close-menu-btn {
    align-self: flex-end;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    margin-bottom: 2rem;
    color: var(--color-primary);
}

.mobile-nav-list {
    margin-bottom: 2rem;
}

.mobile-nav-list li {
    padding: 1rem 0;
    border-bottom: 1px solid var(--color-border);
    font-weight: 500;
}

/* Media Queries */
@media (max-width: 900px) {
    .nav {
        display: none;
    }

    .mobile-menu-btn {
        display: block;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }

    .hero-bg {
        background-position: center;
    }
}

@media (max-width: 600px) {
    :root {
        --spacing-lg: 2rem;
        --spacing-xl: 3rem;
    }

    .section-title {
        font-size: 1.75rem;
    }

    .section-desc {
        font-size: 1rem;
    }

    .hero-title {
        font-size: 2rem;
        margin-bottom: 1rem;
    }

    .hero-subtitle {
        font-size: 1rem;
        margin-bottom: 2rem;
    }

    .hero-cta {
        flex-direction: column;
        align-items: stretch;
        gap: 1rem;
    }

    .hero-cta .btn {
        width: 100%;
    }

    .trust-badge {
        justify-content: center;
    }

    .trust-grid {
        gap: 1.5rem;
    }

    .trust-item {
        flex-direction: column;
        width: 100%;
        text-align: center;
    }

    .pricing-table th,
    .pricing-table td {
        padding: 0.75rem;
        font-size: 0.85rem;
    }

    .footer-form-wrapper {
        padding: 1.5rem;
    }
}