:root {
    --primary-color: #0a192f;
    --secondary-color: #1e3e62;
    --accent-color: #00b4d8;
    --accent-hover: #0077b6;
    --text-color-dark: #1f2937;
    --text-color-light: #f3f4f6;
    --bg-light: #f8fafc;
    --bg-white: #ffffff;
    --card-border: #e2e8f0;
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --font-stack: 'Noto Sans KR', sans-serif;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-stack);
    color: var(--text-color-dark);
    line-height: 1.6;
    background-color: var(--bg-white);
}

.skip-link {
    position: absolute;
    top: -100px;
    left: 0;
    background: var(--accent-color);
    color: white;
    padding: 10px 20px;
    z-index: 9999;
    transition: top var(--transition-fast);
}

.skip-link:focus {
    top: 0;
}

/* Layout Utilities */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.section-padding {
    padding: 80px 0;
}

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

.bg-light {
    background-color: var(--bg-light);
}

/* Typography */
h1, h2, h3, h4 {
    color: var(--primary-color);
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 15px;
}

h1 {
    font-size: 2.5rem;
}

h2 {
    font-size: 2rem;
    margin-bottom: 20px;
}

h3 {
    font-size: 1.5rem;
}

p {
    margin-bottom: 15px;
    color: #4b5563;
}

.highlight {
    color: var(--accent-color);
}

.section-tag {
    display: inline-block;
    color: var(--accent-color);
    font-weight: 700;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 10px;
}

.section-desc {
    max-width: 700px;
    margin: 0 auto 50px auto;
    font-size: 1.125rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 28px;
    font-size: 1rem;
    font-weight: 500;
    border-radius: 6px;
    text-decoration: none;
    transition: all var(--transition-fast);
    cursor: pointer;
    border: none;
}

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

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

.btn-accent {
    background-color: var(--accent-color);
    color: var(--primary-color);
    font-weight: 700;
}

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

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

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

.btn-full {
    width: 100%;
}

.btn-small {
    padding: 8px 16px;
    font-size: 0.875rem;
}

/* Sticky Header & Nav */
.main-header {
    position: sticky;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(8px);
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    z-index: 1000;
    transition: padding var(--transition-fast);
}

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
}

.logo-img {
    display: block;
    max-height: 40px;
    width: auto;
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 10px;
}

.hamburger {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--primary-color);
    position: relative;
    transition: background var(--transition-fast);
}

.hamburger::before, .hamburger::after {
    content: '';
    position: absolute;
    width: 24px;
    height: 2px;
    background-color: var(--primary-color);
    left: 0;
    transition: transform var(--transition-fast);
}

.hamburger::before { top: -6px; }
.hamburger::after { top: 6px; }

.main-nav {
    display: flex;
    align-items: center;
}

.nav-list {
    display: flex;
    align-items: center;
    list-style: none;
    gap: 20px;
}

.nav-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-fast);
}

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

/* Hero Section */
.hero-section {
    color: white;
    padding: 100px 0;
    min-height: 600px;
    display: flex;
    align-items: center;
}

.hero-container {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 40px;
    align-items: center;
}

.hero-text-block h1 {
    color: white;
    font-size: 3rem;
    margin-bottom: 20px;
}

.hero-tag {
    display: inline-block;
    background-color: var(--accent-color);
    color: var(--primary-color);
    padding: 4px 12px;
    font-weight: 700;
    border-radius: 4px;
    margin-bottom: 20px;
    font-size: 0.875rem;
}

.hero-subhead {
    color: var(--text-color-light);
    font-size: 1.25rem;
    margin-bottom: 30px;
}

.hero-features {
    display: flex;
    gap: 20px;
}

.hero-feat-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.95rem;
}

.feat-icon {
    color: var(--accent-color);
}

/* Hero Form Container */
.hero-form-block {
    background-color: var(--bg-white);
    color: var(--text-color-dark);
    border-radius: 8px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.15);
    overflow: hidden;
}

.form-wrapper {
    padding: 30px;
}

.form-wrapper h3 {
    margin-bottom: 10px;
}

.form-intro {
    font-size: 0.875rem;
    margin-bottom: 20px;
}

.lead-form .form-group {
    margin-bottom: 15px;
    text-align: left;
}

.form-row-split {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

.lead-form label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 6px;
    color: var(--primary-color);
}

.lead-form label .required {
    color: #ef4444;
}

.lead-form input[type="text"],
.lead-form input[type="email"],
.lead-form input[type="tel"] {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--card-border);
    border-radius: 4px;
    font-family: var(--font-stack);
    font-size: 0.95rem;
    transition: border-color var(--transition-fast);
}

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

.phone-input-wrapper {
    display: flex;
    align-items: center;
    border: 1px solid var(--card-border);
    border-radius: 4px;
    overflow: hidden;
}

.phone-prefix {
    background-color: var(--bg-light);
    padding: 10px 14px;
    border-right: 1px solid var(--card-border);
    font-weight: 500;
    font-size: 0.95rem;
}

.phone-input-wrapper input {
    border: none !important;
}

.input-desc {
    display: block;
    font-size: 0.75rem;
    color: #6b7280;
    margin-top: 4px;
}

.checkbox-group {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    margin-top: 15px;
}

.checkbox-group input[type="checkbox"] {
    margin-top: 4px;
}

.checkbox-label {
    font-size: 0.8125rem !important;
    line-height: 1.4;
    cursor: pointer;
}

.text-link {
    color: var(--accent-hover);
    text-decoration: underline;
}

.form-success-box {
    text-align: center;
    padding: 40px 10px;
}

.success-icon {
    color: #10b981;
    margin-bottom: 15px;
}

/* Trust Strip */
.trust-strip {
    background-color: var(--primary-color);
    color: white;
    padding: 30px 0;
    border-bottom: 4px solid var(--accent-color);
}

.strip-grid {
    display: flex;
    justify-content: space-around;
    gap: 20px;
    flex-wrap: wrap;
    text-align: center;
}

.strip-item strong {
    display: block;
    font-size: 1.25rem;
    color: var(--accent-color);
}

.strip-item span {
    font-size: 0.875rem;
}

/* Grid Layouts */
.grid-2col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.grid-3col {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.grid-4col {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

/* Benefit Cards */
.card {
    background-color: var(--bg-white);
    border: 1px solid var(--card-border);
    border-radius: 8px;
    overflow: hidden;
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.05);
}

.benefit-img-wrapper {
    position: relative;
    height: 200px;
    overflow: hidden;
    background-color: #eaeaea;
}

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

.solid-placeholder-img {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: bold;
    font-size: 1.2rem;
}

.benefit-content {
    padding: 25px;
    position: relative;
}

.icon-circle {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: rgba(0, 180, 216, 0.1);
    color: var(--accent-hover);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 15px;
}

/* Services */
.services-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
    max-width: 900px;
    margin: 0 auto;
}

.service-item {
    background-color: var(--bg-white);
    border: 1px solid var(--card-border);
    border-radius: 8px;
    padding: 30px;
    display: flex;
    align-items: center;
    gap: 30px;
    transition: border-color var(--transition-fast);
}

.service-item:hover {
    border-color: var(--accent-color);
}

.service-meta {
    flex-shrink: 0;
    width: 250px;
}

.service-num {
    display: block;
    font-size: 2.5rem;
    font-weight: 900;
    color: rgba(0, 180, 216, 0.2);
    line-height: 1;
    margin-bottom: 5px;
}

.service-item p {
    margin-bottom: 0;
    flex-grow: 1;
}

/* Steps */
.step-card {
    text-align: center;
    padding: 20px;
    position: relative;
}

.step-num {
    width: 60px;
    height: 60px;
    background-color: var(--primary-color);
    color: var(--accent-color);
    font-size: 1.5rem;
    font-weight: 700;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px auto;
}

/* About Section */
.about-grid {
    align-items: center;
}

.about-img-block img {
    width: 100%;
    border-radius: 8px;
    box-shadow: 0 10px 20px rgba(0,0,0,0.05);
}

.operator-box {
    background-color: var(--bg-light);
    border-left: 4px solid var(--accent-color);
    padding: 15px;
    margin-top: 25px;
}

.operator-disclosure {
    font-size: 0.875rem;
    line-height: 1.5;
    margin-bottom: 0;
}

/* Testimonial Cards */
.testimonial-card {
    padding: 30px;
}

.stars {
    color: #fbbf24;
    font-size: 1.2rem;
    margin-bottom: 15px;
}

.testimonial-quote {
    font-style: italic;
    font-size: 0.95rem;
    line-height: 1.6;
}

.client-info {
    margin-top: 20px;
    border-top: 1px solid var(--card-border);
    padding-top: 15px;
}

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

.client-info span {
    font-size: 0.75rem;
    color: #6b7280;
}

/* FAQ Accordion */
.faq-container {
    max-width: 800px;
}

.faq-accordion {
    margin-top: 45px;
}

.accordion-item {
    border-bottom: 1px solid var(--card-border);
}

.accordion-header {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 10px;
    background: none;
    border: none;
    cursor: pointer;
    text-align: left;
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--primary-color);
    transition: color var(--transition-fast);
}

.accordion-header:hover {
    color: var(--accent-color);
}

.icon-arrow {
    width: 12px;
    height: 12px;
    border-right: 2px solid var(--primary-color);
    border-bottom: 2px solid var(--primary-color);
    transform: rotate(45deg);
    transition: transform var(--transition-fast);
    flex-shrink: 0;
    margin-left: 15px;
}

.accordion-header[aria-expanded="true"] .icon-arrow {
    transform: rotate(-135deg);
}

.accordion-content {
    padding: 0 10px 20px 10px;
}

/* Footer Styles */
.main-footer {
    background-color: var(--primary-color);
    color: #9ca3af;
    padding: 60px 0 20px 0;
    font-size: 0.875rem;
    border-top: 4px solid var(--accent-color);
}

.footer-top {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-brand h4, .footer-contacts h4 {
    color: white;
    margin-bottom: 15px;
}

.footer-logo {
    margin-bottom: 15px;
    filter: brightness(0) invert(1);
}

.footer-brand-desc {
    max-width: 400px;
}

.footer-contacts a {
    color: var(--accent-color);
    text-decoration: none;
}

.footer-middle {
    border-top: 1px solid #1f2937;
    border-bottom: 1px solid #1f2937;
    padding: 30px 0;
    margin-bottom: 30px;
}

.footer-middle h4 {
    color: white;
    margin-bottom: 15px;
}

.footer-identity-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
    margin-bottom: 20px;
}

.footer-identity-grid p {
    margin-bottom: 0;
    color: #9ca3af;
}

.cross-border-statement {
    font-size: 0.8125rem;
    color: #6b7280;
    margin-top: 15px;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.footer-legal-links {
    display: flex;
    gap: 20px;
}

.footer-legal-links a {
    color: #9ca3af;
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-legal-links a:hover {
    color: white;
}

/* Cookie Consent Banner */
.cookie-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background-color: var(--primary-color);
    border-top: 3px solid var(--accent-color);
    color: white;
    padding: 20px 0;
    z-index: 10000;
    box-shadow: 0 -5px 15px rgba(0,0,0,0.1);
    transform: translateY(100%);
    transition: transform 0.4s ease-out;
}

.cookie-banner.show {
    transform: translateY(0);
}

.cookie-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
}

.cookie-text {
    font-size: 0.875rem;
    margin-bottom: 0;
    color: #d1d5db;
}

.cookie-text a {
    color: var(--accent-color);
}

.cookie-buttons {
    display: flex;
    gap: 10px;
    flex-shrink: 0;
}

/* Back to top button */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 45px;
    height: 45px;
    background-color: var(--primary-color);
    color: var(--accent-color);
    border: none;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 4px 10px rgba(0,0,0,0.15);
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s, visibility 0.3s;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

/* Responsive Styles */
@media (max-width: 991px) {
    h1 { font-size: 2.125rem; }
    h2 { font-size: 1.75rem; }
    
    .hero-container {
        grid-template-columns: 1fr;
        gap: 50px;
    }
    
    .grid-3col {
        grid-template-columns: 1fr;
    }
    
    .grid-4col {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .about-grid {
        grid-template-columns: 1fr;
    }
    
    .about-img-block {
        order: -1;
    }
    
    .service-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }
    
    .service-meta {
        width: 100%;
    }
}

@media (max-width: 768px) {
    .nav-toggle {
        display: block;
    }
    
    .main-nav {
        position: absolute;
        top: 80px;
        left: 0;
        width: 100%;
        background-color: white;
        box-shadow: 0 10px 15px rgba(0,0,0,0.05);
        padding: 20px;
        display: none;
        flex-direction: column;
        border-top: 1px solid var(--card-border);
    }
    
    .main-nav.active {
        display: block;
    }
    
    .nav-list {
        flex-direction: column;
        width: 100%;
        gap: 15px;
    }
    
    .nav-cta {
        width: 100%;
        margin-top: 10px;
    }
    
    .header-container {
        height: 70px;
    }
    
    .main-nav {
        top: 70px;
    }
    
    .nav-toggle[aria-expanded="true"] .hamburger {
        background-color: transparent;
    }
    
    .nav-toggle[aria-expanded="true"] .hamburger::before {
        transform: rotate(45deg) translate(4px, 4px);
    }
    
    .nav-toggle[aria-expanded="true"] .hamburger::after {
        transform: rotate(-45deg) translate(4px, -4px);
    }
    
    .grid-2col, .grid-4col {
        grid-template-columns: 1fr;
    }
    
    .footer-top {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .footer-identity-grid {
        grid-template-columns: 1fr;
    }
    
    .cookie-container {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .cookie-buttons {
        width: 100%;
    }
}