/* ========================================
   케이디자인 - 메인 스타일시트
   Modern / Minimal / Blue Theme
   ======================================== */

/* CSS Variables */
:root {
    /* Colors - Blue Theme */
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #3b82f6;
    --primary-bg: #eff6ff;

    --secondary: #64748b;
    --secondary-dark: #475569;

    --accent: #0ea5e9;

    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-light: #94a3b8;

    --bg-white: #ffffff;
    --bg-light: #f8fafc;
    --bg-gray: #f1f5f9;

    --border: #e2e8f0;
    --border-light: #f1f5f9;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;

    /* Typography */
    --font-family: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;
    --font-size-5xl: 3rem;

    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;

    /* Container */
    --container-max: 1200px;
    --container-padding: 1.5rem;
}

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

html {
    scroll-behavior: smooth;
}

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

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

a {
    color: inherit;
    text-decoration: none;
}

ul, ol {
    list-style: none;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.3;
    color: var(--text-primary);
}

.section-title {
    font-size: var(--font-size-3xl);
    text-align: center;
    margin-bottom: var(--spacing-md);
}

.section-subtitle {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-base);
    font-weight: 500;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

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

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

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

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

.btn-text {
    color: var(--primary);
    padding: var(--spacing-sm) 0;
}

.btn-text:hover {
    color: var(--primary-dark);
}

.btn-large {
    padding: var(--spacing-lg) var(--spacing-2xl);
    font-size: var(--font-size-lg);
}

.full-width {
    width: 100%;
}

/* ========================================
   Navigation
   ======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-light);
    transition: all var(--transition-base);
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.logo-text {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--primary);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
}

.nav-menu a {
    font-weight: 500;
    color: var(--text-secondary);
    transition: color var(--transition-fast);
    position: relative;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--primary);
}

.nav-menu a.active::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--primary);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: var(--spacing-sm);
}

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

/* ========================================
   Hero Section
   ======================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px var(--container-padding) var(--spacing-3xl);
    background: linear-gradient(135deg, var(--bg-white) 0%, var(--primary-bg) 100%);
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
}

.hero-content {
    max-width: 600px;
}

.hero-title {
    font-size: var(--font-size-5xl);
    line-height: 1.2;
    margin-bottom: var(--spacing-lg);
}

.hero-title .highlight {
    color: var(--primary);
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-2xl);
}

.hero-cta {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-image {
    width: 100%;
    max-width: 500px;
    height: auto;
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-xl);
}

.hero-image-placeholder {
    width: 100%;
    max-width: 500px;
    aspect-ratio: 1;
    position: relative;
}

.floating-shapes {
    position: absolute;
    inset: 0;
}

.shape {
    position: absolute;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    opacity: 0.8;
    animation: float 6s ease-in-out infinite;
}

.shape-1 {
    width: 200px;
    height: 200px;
    top: 10%;
    left: 20%;
    animation-delay: 0s;
}

.shape-2 {
    width: 150px;
    height: 150px;
    top: 40%;
    right: 15%;
    animation-delay: -2s;
    border-radius: 50%;
}

.shape-3 {
    width: 100px;
    height: 100px;
    bottom: 20%;
    left: 30%;
    animation-delay: -4s;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
    }
    50% {
        transform: translateY(-20px) rotate(5deg);
    }
}

/* ========================================
   Services Section
   ======================================== */
.services {
    padding: var(--spacing-3xl) 0;
    background-color: var(--bg-white);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
}

.service-card {
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    transition: all var(--transition-base);
}

.service-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.service-icon {
    width: 64px;
    height: 64px;
    margin-bottom: var(--spacing-lg);
}

.service-icon .icon {
    width: 100%;
    height: 100%;
    color: var(--primary);
}

.service-card h3 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-sm);
}

.service-card > p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

.service-features {
    margin-bottom: var(--spacing-lg);
}

.service-features li {
    padding: var(--spacing-xs) 0;
    padding-left: var(--spacing-lg);
    position: relative;
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

.service-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary);
    font-weight: bold;
}

/* ========================================
   Why Us Section
   ======================================== */
.why-us {
    padding: var(--spacing-3xl) 0;
    background-color: var(--bg-light);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-xl);
}

.feature {
    text-align: center;
    padding: var(--spacing-xl);
}

.feature-number {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--primary);
    margin-bottom: var(--spacing-md);
}

.feature h4 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-sm);
}

.feature p {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

/* ========================================
   CTA Section
   ======================================== */
.cta {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    text-align: center;
}

.cta h2 {
    color: white;
    font-size: var(--font-size-3xl);
    margin-bottom: var(--spacing-md);
}

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

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

.cta .btn-primary:hover {
    background-color: var(--bg-light);
}

/* ========================================
   Footer
   ======================================== */
.footer {
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
    background-color: var(--text-primary);
    color: white;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--spacing-3xl);
    padding-bottom: var(--spacing-2xl);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand .logo-text {
    color: white;
    font-size: var(--font-size-2xl);
}

.footer-brand p {
    margin-top: var(--spacing-sm);
    color: var(--text-light);
}

.footer-links h4,
.footer-contact h4 {
    color: white;
    font-size: var(--font-size-base);
    margin-bottom: var(--spacing-lg);
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer-links a {
    color: var(--text-light);
    transition: color var(--transition-fast);
}

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

.footer-contact p {
    color: var(--text-light);
    margin-bottom: var(--spacing-sm);
    font-size: var(--font-size-sm);
}

.footer-bottom {
    padding-top: var(--spacing-xl);
    text-align: center;
}

.footer-bottom p {
    color: var(--text-light);
    font-size: var(--font-size-sm);
}

/* ========================================
   Page Hero (Sub Pages)
   ======================================== */
.page-hero {
    padding: 140px 0 60px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    text-align: center;
}

.page-hero h1 {
    color: white;
    font-size: var(--font-size-4xl);
    margin-bottom: var(--spacing-md);
}

.page-hero p {
    font-size: var(--font-size-xl);
    opacity: 0.9;
}

/* ========================================
   Service Overview
   ======================================== */
.service-overview {
    padding: var(--spacing-3xl) 0;
}

.overview-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.overview-text h2 {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--spacing-lg);
}

.overview-text p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-lg);
}

/* Service & Category Images */
.service-image,
.category-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: var(--radius-xl);
}

.category-image .category-img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 0;
}

/* Image Placeholder */
.image-placeholder {
    width: 100%;
    aspect-ratio: 4/3;
    background: linear-gradient(135deg, var(--bg-light) 0%, var(--bg-gray) 100%);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px dashed var(--border);
}

.placeholder-content {
    text-align: center;
    color: var(--text-light);
}

.placeholder-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--spacing-md);
    opacity: 0.5;
}

.placeholder-content span {
    font-size: var(--font-size-sm);
}

/* ========================================
   Service Categories
   ======================================== */
.service-categories {
    padding: var(--spacing-3xl) 0;
    background-color: var(--bg-light);
}

.category-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
}

.category-card {
    background: var(--bg-white);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
}

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

.category-image {
    height: 200px;
    overflow: hidden;
}

.category-image .image-placeholder {
    height: 100%;
    aspect-ratio: unset;
    border-radius: 0;
    border: none;
}

.category-content {
    padding: var(--spacing-xl);
}

.category-content h3 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-sm);
}

.category-content > p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

.category-content ul {
    margin-bottom: var(--spacing-lg);
}

.category-content li {
    padding: var(--spacing-xs) 0;
    padding-left: var(--spacing-lg);
    position: relative;
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

.category-content li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--primary);
}

/* Tech Stack Tags */
.tech-stack {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.tech-tag {
    background-color: var(--primary-bg);
    color: var(--primary);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: 500;
}

/* ========================================
   Process Section
   ======================================== */
.process {
    padding: var(--spacing-3xl) 0;
}

.process-steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-xl);
}

.process-step {
    text-align: center;
    padding: var(--spacing-xl);
    position: relative;
}

.process-step:not(:last-child)::after {
    content: '';
    position: absolute;
    top: 40px;
    right: -20px;
    width: 40px;
    height: 2px;
    background-color: var(--border);
}

.step-number {
    width: 60px;
    height: 60px;
    background-color: var(--primary);
    color: white;
    font-size: var(--font-size-xl);
    font-weight: 700;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-lg);
}

.process-step h4 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-sm);
}

.process-step p {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

/* ========================================
   Specs Section
   ======================================== */
.specs {
    padding: var(--spacing-3xl) 0;
    background-color: var(--bg-light);
}

.specs-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
}

.spec-card {
    background: var(--bg-white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
}

.spec-card h4 {
    color: var(--primary);
    margin-bottom: var(--spacing-lg);
    font-size: var(--font-size-lg);
}

.spec-card li {
    padding: var(--spacing-sm) 0;
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    border-bottom: 1px solid var(--border-light);
}

.spec-card li:last-child {
    border-bottom: none;
}

/* ========================================
   ERP Features
   ======================================== */
.erp-features {
    padding: var(--spacing-3xl) 0;
}

.features-showcase {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-3xl);
}

.feature-block {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.feature-block.reverse {
    direction: rtl;
}

.feature-block.reverse > * {
    direction: ltr;
}

.feature-visual .image-placeholder {
    aspect-ratio: 4/3;
}

.feature-content h3 {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-md);
}

.feature-content > p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
}

.feature-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.feature-list li {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    padding: var(--spacing-md);
    background-color: var(--bg-light);
    border-radius: var(--radius-md);
}

.feature-list strong {
    color: var(--text-primary);
    font-weight: 600;
}

.feature-list span {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

/* ========================================
   ERP Modules
   ======================================== */
.erp-modules {
    padding: var(--spacing-3xl) 0;
    background-color: var(--bg-light);
}

.modules-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-xl);
}

.module-card {
    background: var(--bg-white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    text-align: center;
    border: 1px solid var(--border);
    transition: all var(--transition-base);
}

.module-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-md);
}

.module-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto var(--spacing-md);
}

.module-icon .icon {
    width: 100%;
    height: 100%;
    color: var(--primary);
}

.module-card h4 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-sm);
}

.module-card p {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

/* ========================================
   ERP Benefits
   ======================================== */
.erp-benefits {
    padding: var(--spacing-3xl) 0;
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-xl);
}

.benefit-item {
    text-align: center;
    padding: var(--spacing-xl);
    background: var(--primary-bg);
    border-radius: var(--radius-xl);
}

.benefit-stat {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: var(--primary);
    margin-bottom: var(--spacing-md);
}

.benefit-item h4 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-sm);
}

.benefit-item p {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

/* ========================================
   Tech Categories (Coding Page)
   ======================================== */
.portfolio-preview {
    padding: var(--spacing-3xl) 0;
    background-color: var(--bg-light);
}

.tech-categories {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-xl);
}

.tech-category {
    background: var(--bg-white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
}

.tech-category h4 {
    color: var(--primary);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--primary-bg);
}

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

.tech-list span {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    padding: var(--spacing-xs) 0;
}

/* ========================================
   Contact Page
   ======================================== */
.contact-section {
    padding: var(--spacing-3xl) 0;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: var(--spacing-3xl);
}

.contact-info h2 {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-md);
}

.contact-info > p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-2xl);
}

.contact-methods {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
}

.contact-method {
    display: flex;
    gap: var(--spacing-lg);
    align-items: flex-start;
}

.method-icon {
    width: 48px;
    height: 48px;
    flex-shrink: 0;
}

.method-icon .icon {
    width: 100%;
    height: 100%;
    color: var(--primary);
}

.method-content h4 {
    font-size: var(--font-size-base);
    margin-bottom: var(--spacing-xs);
}

.method-content a {
    color: var(--primary);
    font-size: var(--font-size-lg);
    font-weight: 500;
}

.method-content p {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    margin-top: var(--spacing-xs);
}

/* Service Inquiry Buttons */
.service-inquiry h3 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-lg);
}

.inquiry-buttons {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.inquiry-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--bg-light);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

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

.inquiry-icon {
    font-size: var(--font-size-xl);
}

/* Contact Form */
.contact-form-wrapper {
    background: var(--bg-light);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-xl);
}

.contact-form-wrapper h2 {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-xl);
}

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

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

.form-group.full-width {
    grid-column: span 2;
}

.form-group label {
    font-weight: 500;
    font-size: var(--font-size-sm);
    color: var(--text-primary);
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: var(--spacing-md);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: var(--font-size-base);
    transition: border-color var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

/* File Upload */
.file-upload {
    position: relative;
}

.file-upload input[type="file"] {
    position: absolute;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
}

.file-upload-label {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
    border: 2px dashed var(--border);
    border-radius: var(--radius-md);
    background: var(--bg-white);
    text-align: center;
    transition: all var(--transition-fast);
}

.file-upload:hover .file-upload-label {
    border-color: var(--primary);
    background: var(--primary-bg);
}

.upload-icon {
    width: 40px;
    height: 40px;
    color: var(--text-light);
    margin-bottom: var(--spacing-sm);
}

.file-upload-label span {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

.file-upload-label small {
    color: var(--text-light);
    font-size: var(--font-size-xs);
    margin-top: var(--spacing-xs);
}

.file-list {
    margin-top: var(--spacing-sm);
}

/* Checkbox */
.checkbox-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.checkbox-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--primary);
}

.form-note {
    margin-top: var(--spacing-lg);
    grid-column: span 2;
}

.form-note p {
    color: var(--text-light);
    font-size: var(--font-size-sm);
}

/* ========================================
   FAQ Section
   ======================================== */
.faq-section {
    padding: var(--spacing-3xl) 0;
    background-color: var(--bg-light);
}

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

.faq-item {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-md);
    overflow: hidden;
    border: 1px solid var(--border);
}

.faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-lg);
    font-size: var(--font-size-base);
    font-weight: 500;
    text-align: left;
    transition: all var(--transition-fast);
}

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

.faq-icon {
    width: 24px;
    height: 24px;
    flex-shrink: 0;
    transition: transform var(--transition-fast);
}

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

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-slow);
}

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

.faq-answer p {
    padding: 0 var(--spacing-lg) var(--spacing-lg);
    color: var(--text-secondary);
    line-height: 1.8;
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 1024px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-content {
        max-width: 100%;
    }

    .hero-cta {
        justify-content: center;
    }

    .hero-visual {
        display: none;
    }

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

    .features-grid,
    .process-steps,
    .modules-grid,
    .benefits-grid,
    .tech-categories {
        grid-template-columns: repeat(2, 1fr);
    }

    .process-step:not(:last-child)::after {
        display: none;
    }

    .feature-block,
    .feature-block.reverse {
        grid-template-columns: 1fr;
    }

    .feature-block.reverse {
        direction: ltr;
    }

    .overview-content {
        grid-template-columns: 1fr;
    }

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

    .footer-content {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    :root {
        --font-size-5xl: 2.5rem;
        --font-size-4xl: 2rem;
        --font-size-3xl: 1.5rem;
    }

    .nav-menu {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: var(--bg-white);
        flex-direction: column;
        padding: var(--spacing-xl);
        gap: var(--spacing-lg);
        border-bottom: 1px solid var(--border);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-base);
    }

    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-toggle {
        display: flex;
    }

    .services-grid,
    .category-grid,
    .features-grid,
    .process-steps,
    .specs-grid,
    .modules-grid,
    .benefits-grid,
    .tech-categories {
        grid-template-columns: 1fr;
    }

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

    .form-group.full-width {
        grid-column: span 1;
    }

    .form-note {
        grid-column: span 1;
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .inquiry-buttons {
        flex-direction: row;
        flex-wrap: wrap;
    }

    .inquiry-btn {
        flex: 1;
        min-width: 140px;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 100px var(--container-padding) var(--spacing-2xl);
    }

    .hero-title {
        font-size: var(--font-size-3xl);
    }

    .hero-cta {
        flex-direction: column;
    }

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

/* ========================================
   Thank You Page
   ======================================== */
.thank-you-section {
    min-height: 80vh;
    display: flex;
    align-items: center;
    padding: 120px var(--container-padding) var(--spacing-3xl);
}

.thank-you-content {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

.thank-you-icon {
    width: 100px;
    height: 100px;
    margin: 0 auto var(--spacing-xl);
    color: var(--primary);
}

.thank-you-icon .icon {
    width: 100%;
    height: 100%;
}

.thank-you-content h1 {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--spacing-md);
}

.thank-you-message {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-2xl);
    line-height: 1.8;
}

.thank-you-info {
    background: var(--bg-light);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-xl);
    text-align: left;
}

.thank-you-info h3 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-md);
    text-align: center;
}

.thank-you-info ul {
    margin-bottom: var(--spacing-md);
}

.thank-you-info li {
    padding: var(--spacing-sm) 0;
    color: var(--text-secondary);
}

.thank-you-info li::before {
    content: '✓';
    color: var(--primary);
    font-weight: bold;
    margin-right: var(--spacing-sm);
}

.thank-you-info .note {
    font-size: var(--font-size-sm);
    color: var(--text-light);
    text-align: center;
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border);
}

.thank-you-contact {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
}

.contact-method {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.icon-small {
    width: 24px;
    height: 24px;
    color: var(--primary);
}

.contact-method span {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

.thank-you-actions {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
}

.auto-redirect {
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--border);
}

.auto-redirect p {
    color: var(--text-light);
    font-size: var(--font-size-sm);
}