/* ============================================
   필유통 (Fill 유통) - 기업 웹사이트 스타일시트
   ============================================ */

/* Font Face - Freesentation (본문용) */
@font-face {
  font-family: 'Freesentation';
  font-weight: 100;
  font-style: normal;
  font-display: swap;
  src: url('../fonts/Freesentation-1Thin.ttf') format('truetype');
}

@font-face {
  font-family: 'Freesentation';
  font-weight: 200;
  font-style: normal;
  font-display: swap;
  src: url('../fonts/Freesentation-2ExtraLight.ttf') format('truetype');
}

@font-face {
  font-family: 'Freesentation';
  font-weight: 300;
  font-style: normal;
  font-display: swap;
  src: url('../fonts/Freesentation-3Light.ttf') format('truetype');
}

@font-face {
  font-family: 'Freesentation';
  font-weight: 400;
  font-style: normal;
  font-display: swap;
  src: url('../fonts/Freesentation-4Regular.ttf') format('truetype');
}

@font-face {
  font-family: 'Freesentation';
  font-weight: 500;
  font-style: normal;
  font-display: swap;
  src: url('../fonts/Freesentation-5Medium.ttf') format('truetype');
}

@font-face {
  font-family: 'Freesentation';
  font-weight: 600;
  font-style: normal;
  font-display: swap;
  src: url('../fonts/Freesentation-6SemiBold.ttf') format('truetype');
}

@font-face {
  font-family: 'Freesentation';
  font-weight: 700;
  font-style: normal;
  font-display: swap;
  src: url('../fonts/Freesentation-7Bold.ttf') format('truetype');
}

@font-face {
  font-family: 'Freesentation';
  font-weight: 800;
  font-style: normal;
  font-display: swap;
  src: url('../fonts/Freesentation-8ExtraBold.ttf') format('truetype');
}

@font-face {
  font-family: 'Freesentation';
  font-weight: 900;
  font-style: normal;
  font-display: swap;
  src: url('../fonts/Freesentation-9Black.ttf') format('truetype');
}

/* Font Face - Paperlogy (제목/강조용) */
@font-face {
  font-family: 'Paperlogy';
  font-weight: 100;
  font-style: normal;
  font-display: swap;
  src: url('../fonts/Paperlogy-1Thin.ttf') format('truetype');
}

@font-face {
  font-family: 'Paperlogy';
  font-weight: 200;
  font-style: normal;
  font-display: swap;
  src: url('../fonts/Paperlogy-2ExtraLight.ttf') format('truetype');
}

@font-face {
  font-family: 'Paperlogy';
  font-weight: 300;
  font-style: normal;
  font-display: swap;
  src: url('../fonts/Paperlogy-3Light.ttf') format('truetype');
}

@font-face {
  font-family: 'Paperlogy';
  font-weight: 400;
  font-style: normal;
  font-display: swap;
  src: url('../fonts/Paperlogy-4Regular.ttf') format('truetype');
}

@font-face {
  font-family: 'Paperlogy';
  font-weight: 500;
  font-style: normal;
  font-display: swap;
  src: url('../fonts/Paperlogy-5Medium.ttf') format('truetype');
}

@font-face {
  font-family: 'Paperlogy';
  font-weight: 600;
  font-style: normal;
  font-display: swap;
  src: url('../fonts/Paperlogy-6SemiBold.ttf') format('truetype');
}

@font-face {
  font-family: 'Paperlogy';
  font-weight: 700;
  font-style: normal;
  font-display: swap;
  src: url('../fonts/Paperlogy-7Bold.ttf') format('truetype');
}

@font-face {
  font-family: 'Paperlogy';
  font-weight: 800;
  font-style: normal;
  font-display: swap;
  src: url('../fonts/Paperlogy-8ExtraBold.ttf') format('truetype');
}

@font-face {
  font-family: 'Paperlogy';
  font-weight: 900;
  font-style: normal;
  font-display: swap;
  src: url('../fonts/Paperlogy-9Black.ttf') format('truetype');
}

/* CSS Variables */
:root {
  /* Colors */
  --color-primary: #1e3a8a; /* Navy */
  --color-primary-dark: #1e40af;
  --color-primary-light: #3b82f6;
  --color-secondary: #64748b; /* Gray */
  --color-accent: #0ea5e9; /* Sky blue */
  --color-white: #ffffff;
  --color-gray-50: #f8fafc;
  --color-gray-100: #f1f5f9;
  --color-gray-200: #e2e8f0;
  --color-gray-300: #cbd5e1;
  --color-gray-400: #94a3b8;
  --color-gray-500: #64748b;
  --color-gray-600: #475569;
  --color-gray-700: #334155;
  --color-gray-800: #1e293b;
  --color-gray-900: #0f172a;
  
  /* Typography */
  /* 조합 4: 단일 폰트 (Paperlogy) - 모든 텍스트에 강한 임팩트 */
  --font-family-base: "Paperlogy", -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans KR", "Malgun Gothic", "맑은 고딕", sans-serif;
  --font-family-heading: "Paperlogy", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-size-xs: 0.75rem; /* 12px */
  --font-size-sm: 0.875rem; /* 14px */
  --font-size-base: 1rem; /* 16px */
  --font-size-lg: 1.125rem; /* 18px */
  --font-size-xl: 1.25rem; /* 20px */
  --font-size-2xl: 1.5rem; /* 24px */
  --font-size-3xl: 1.875rem; /* 30px */
  --font-size-4xl: 2.25rem; /* 36px */
  --font-size-5xl: 3rem; /* 48px */
  
  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;
  
  /* Spacing */
  --spacing-xs: 0.25rem; /* 4px */
  --spacing-sm: 0.5rem; /* 8px */
  --spacing-md: 1rem; /* 16px */
  --spacing-lg: 1.5rem; /* 24px */
  --spacing-xl: 2rem; /* 32px */
  --spacing-2xl: 3rem; /* 48px */
  --spacing-3xl: 4rem; /* 64px */
  --spacing-4xl: 6rem; /* 96px */
  
  /* Layout */
  --container-max-width: 1200px;
  --container-padding: 1rem;
  --header-height: 70px;
  --border-radius: 8px;
  --border-radius-lg: 12px;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  
  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-base: 300ms ease-in-out;
  --transition-slow: 500ms ease-in-out;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
  font-weight: 400; /* Regular로 본문 가독성 유지 */
  line-height: var(--line-height-relaxed);
  color: var(--color-gray-800);
  background-color: var(--color-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-family-heading);
  font-weight: 700; /* Bold로 강조 */
  line-height: var(--line-height-tight);
  color: var(--color-gray-900);
  margin-bottom: var(--spacing-md);
  letter-spacing: -0.02em;
}

h1 {
  font-size: var(--font-size-4xl);
}

h2 {
  font-size: var(--font-size-3xl);
}

h3 {
  font-size: var(--font-size-2xl);
}

h4 {
  font-size: var(--font-size-xl);
}

p {
  margin-bottom: var(--spacing-md);
  color: var(--color-gray-700);
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover,
a:focus {
  color: var(--color-primary-light);
  outline: none;
}

a:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

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

/* Image Styles */
.company-photo,
.ceo-photo {
  width: 100%;
  height: auto;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg);
  object-fit: cover;
}

.company-photo {
  max-width: 800px;
}

.ceo-photo {
  max-width: 300px;
}

.image-placeholder {
  width: 100%;
  height: 400px;
  background-color: var(--color-gray-200);
  border-radius: var(--border-radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-gray-500);
  font-size: var(--font-size-sm);
  text-align: center;
  padding: var(--spacing-lg);
}

.image-placeholder--ceo {
  height: 300px;
  max-width: 300px;
  margin: 0 auto;
}

ul, ol {
  list-style: none;
}

/* Container */
.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

/* Header */
.header {
  background-color: var(--color-white);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 1000;
  height: var(--header-height);
  min-height: var(--header-height);
  display: flex;
  align-items: center;
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  min-height: var(--header-height);
}

.logo {
  font-family: var(--font-family-heading);
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-primary);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  letter-spacing: -0.01em;
  line-height: 1;
  height: 100%;
  padding: 0;
}

.logo__icon {
  width: 40px;
  height: 40px;
  background-color: var(--color-primary);
  border-radius: var(--border-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  font-weight: 700;
  flex-shrink: 0;
}

/* Navigation */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: var(--font-size-2xl);
  color: var(--color-gray-700);
  cursor: pointer;
  padding: var(--spacing-sm);
  line-height: 1;
}

.nav {
  display: flex;
  gap: var(--spacing-lg);
  align-items: center;
  height: 100%;
}

.nav__link {
  font-size: var(--font-size-base);
  font-weight: 500;
  color: var(--color-gray-700);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--border-radius);
  transition: background-color var(--transition-fast), color var(--transition-fast);
  display: inline-flex;
  align-items: center;
  line-height: 1.2;
  white-space: nowrap;
}

.nav__link:hover,
.nav__link:focus,
.nav__link.active {
  color: var(--color-primary);
  background-color: var(--color-gray-50);
}

/* Main Content */
.main {
  min-height: calc(100vh - var(--header-height) - 200px);
  padding: var(--spacing-2xl) 0;
}

/* Hero Section */
.hero {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: var(--color-white);
  padding: var(--spacing-4xl) 0;
  text-align: center;
  position: relative;
}

/* Hero Slider */
.hero--slider {
  padding: 0;
  overflow: hidden;
  position: relative;
  display: flex;
  flex-direction: column;
}

.hero-slider {
  position: relative;
  width: 100%;
  min-height: 600px;
  height: 600px;
}

.hero-slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 600px; /* 고정 높이 */
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.6s ease-in-out, visibility 0.6s ease-in-out;
  display: flex;
  align-items: center;
  will-change: opacity;
  pointer-events: none; /* 비활성 슬라이드는 클릭 방지 */
}

.hero-slide.active {
  opacity: 1;
  visibility: visible;
  z-index: 1;
  pointer-events: auto; /* 활성 슬라이드만 클릭 가능 */
}

.hero-slide__overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(30, 58, 138, 0.85) 0%, rgba(30, 64, 175, 0.75) 100%);
  z-index: 1;
}

.hero-slide__content {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-4xl) var(--container-padding) var(--spacing-2xl);
  text-align: left;
  min-height: 400px; /* 최소 높이 고정으로 레이아웃 안정화 */
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.hero-slider__indicators {
  position: relative;
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  align-items: center;
  padding: var(--spacing-lg) 0;
  background-color: transparent;
}

.hero-slider__indicator {
  width: 40px; /* 고정 너비 - 모든 상태에서 동일 */
  height: 8px; /* 고정 높이 - 모든 상태에서 동일 */
  border-radius: 4px;
  border: none;
  background-color: rgba(255, 255, 255, 0.4);
  cursor: pointer;
  padding: 0;
  transition: background-color 0.3s ease-in-out;
  opacity: 1;
  flex-shrink: 0; /* 크기 변경 방지 */
  position: relative; /* 레이아웃 안정화 */
}

.hero-slider__indicator:hover {
  background-color: rgba(255, 255, 255, 0.7);
}

.hero-slider__indicator.active {
  background-color: var(--color-white);
  opacity: 1;
  /* 크기 변경 없이 색상만 변경하여 일관성 유지 */
}

.hero__title {
  font-family: var(--font-family-heading);
  font-size: var(--font-size-5xl);
  font-weight: 800;
  margin-bottom: var(--spacing-lg);
  color: var(--color-white);
  letter-spacing: -0.03em;
  line-height: 1.1;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.hero--slider .hero__title {
  max-width: 800px;
}

.hero__subtitle {
  font-family: var(--font-family-base);
  font-size: var(--font-size-xl);
  font-weight: 400;
  margin-bottom: var(--spacing-2xl);
  color: #F0F0F0;
  opacity: 0.95;
  line-height: var(--line-height-relaxed);
  text-shadow: 0 1px 5px rgba(0, 0, 0, 0.3);
}

.hero--slider .hero__subtitle {
  max-width: 700px;
}

.hero__cta {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  font-family: var(--font-family-base);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: var(--font-size-base);
  font-weight: 600;
  border-radius: var(--border-radius);
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  gap: var(--spacing-sm);
  letter-spacing: -0.01em;
}

.btn:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

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

.btn--primary:hover {
  background-color: var(--color-gray-50);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

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

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

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

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

/* Section */
.section {
  padding: var(--spacing-4xl) 0;
}

.section__header {
  text-align: center;
  margin-bottom: var(--spacing-3xl);
}

.section__title {
  font-family: var(--font-family-heading);
  font-size: var(--font-size-4xl);
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  letter-spacing: -0.02em;
}

.section__subtitle {
  font-family: var(--font-family-base);
  font-size: var(--font-size-lg);
  font-weight: 400;
  color: var(--color-gray-600);
  max-width: 600px;
  margin: 0 auto;
  line-height: var(--line-height-relaxed);
}

/* Cards Grid */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-xl);
  margin-top: var(--spacing-2xl);
}

.card {
  background-color: var(--color-white);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

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

.card__icon {
  width: 60px;
  height: 60px;
  background-color: var(--color-primary);
  border-radius: var(--border-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  font-size: var(--font-size-2xl);
  margin-bottom: var(--spacing-lg);
}

.card__title {
  font-family: var(--font-family-heading);
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  letter-spacing: -0.01em;
}

.card__text {
  font-family: var(--font-family-base);
  color: var(--color-gray-600);
  line-height: var(--line-height-relaxed);
  font-weight: 400;
}

/* Process Steps */
.process-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-xl);
  margin-top: var(--spacing-2xl);
  position: relative;
}

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

.process-step__number {
  width: 60px;
  height: 60px;
  background-color: var(--color-primary);
  color: var(--color-white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-2xl);
  font-weight: 700;
  margin: 0 auto var(--spacing-lg);
}

.process-step__title {
  font-family: var(--font-family-heading);
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  letter-spacing: -0.01em;
}

.process-step__text {
  font-family: var(--font-family-base);
  color: var(--color-gray-600);
  line-height: var(--line-height-relaxed);
  font-weight: 400;
}

/* Category Grid */
.category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-2xl);
}

.category-item {
  background-color: var(--color-gray-50);
  border-radius: var(--border-radius);
  padding: var(--spacing-lg);
  text-align: center;
  transition: background-color var(--transition-fast), transform var(--transition-fast);
  cursor: pointer;
}

.category-item:hover {
  background-color: var(--color-primary);
  color: var(--color-white);
  transform: translateY(-2px);
}

.category-item__name {
  font-family: var(--font-family-heading);
  font-weight: 600;
  font-size: var(--font-size-lg);
  letter-spacing: -0.01em;
}

/* FAQ */
.faq-list {
  max-width: 800px;
  margin: var(--spacing-2xl) auto 0;
}

.faq-item {
  border-bottom: 1px solid var(--color-gray-200);
  padding: var(--spacing-lg) 0;
}

.faq-item:first-child {
  border-top: 1px solid var(--color-gray-200);
}

.faq-question {
  font-family: var(--font-family-heading);
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-gray-900);
  margin-bottom: var(--spacing-md);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-md);
  letter-spacing: -0.01em;
}

.faq-question::after {
  content: '+';
  font-size: var(--font-size-2xl);
  color: var(--color-primary);
  transition: transform var(--transition-fast);
}

.faq-item.active .faq-question::after {
  transform: rotate(45deg);
}

.faq-answer {
  font-family: var(--font-family-base);
  color: var(--color-gray-600);
  line-height: var(--line-height-relaxed);
  font-weight: 400;
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-base);
}

.faq-item.active .faq-answer {
  max-height: 500px;
  padding-top: var(--spacing-md);
}

/* Form */
.form {
  max-width: 600px;
  margin: 0 auto;
}

.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-label {
  font-family: var(--font-family-heading);
  display: block;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--color-gray-900);
  letter-spacing: -0.01em;
}

.form-input,
.form-textarea {
  width: 100%;
  padding: var(--spacing-md);
  border: 2px solid var(--color-gray-300);
  border-radius: var(--border-radius);
  font-size: var(--font-size-base);
  font-family: inherit;
  transition: border-color var(--transition-fast);
}

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

.form-input.error,
.form-textarea.error {
  border-color: #ef4444;
}

.form-error {
  color: #ef4444;
  font-size: var(--font-size-sm);
  margin-top: var(--spacing-xs);
  display: none;
}

.form-error.show {
  display: block;
}

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

/* Footer */
.footer {
  background-color: var(--color-gray-900);
  color: var(--color-gray-300);
  padding: var(--spacing-3xl) 0 var(--spacing-xl);
  margin-top: var(--spacing-4xl);
}

.footer__content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.footer__section-title {
  font-family: var(--font-family-heading);
  color: var(--color-white);
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  letter-spacing: -0.01em;
}

.footer__info {
  line-height: var(--line-height-relaxed);
}

.footer__info-item {
  margin-bottom: var(--spacing-sm);
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-sm);
}

.footer__info-item strong {
  color: var(--color-white);
  min-width: 60px;
}

.footer__bottom {
  border-top: 1px solid var(--color-gray-800);
  padding-top: var(--spacing-lg);
  text-align: center;
  font-size: var(--font-size-sm);
  color: var(--color-gray-400);
}

/* Contact Section */
.contact-section {
  background-color: var(--color-gray-50);
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-xl);
  margin-top: var(--spacing-2xl);
}

.contact-card {
  background-color: var(--color-white);
  padding: var(--spacing-xl);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
}

.contact-card__icon {
  font-size: var(--font-size-3xl);
  color: var(--color-primary);
  margin-bottom: var(--spacing-md);
}

.contact-card__title {
  font-family: var(--font-family-heading);
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  letter-spacing: -0.01em;
}

.contact-card__link {
  color: var(--color-gray-700);
  font-size: var(--font-size-lg);
}

.contact-card__link:hover {
  color: var(--color-primary);
}

/* Map Section */
.map-section {
  margin-top: var(--spacing-2xl);
}

.map-container {
  width: 100%;
  height: 400px;
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  background-color: var(--color-gray-200);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-gray-500);
}

/* Sticky Contact Button (Mobile) */
.sticky-contact {
  position: fixed;
  bottom: var(--spacing-lg);
  right: var(--spacing-lg);
  z-index: 999;
  display: none;
}

.sticky-contact__btn {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: var(--color-white);
  border: none;
  font-size: var(--font-size-xl);
  cursor: pointer;
  box-shadow: var(--shadow-lg);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.sticky-contact__btn:hover {
  transform: scale(1.1);
  box-shadow: var(--shadow-xl);
}

/* Success Message */
.success-message {
  background-color: #10b981;
  color: var(--color-white);
  padding: var(--spacing-md);
  border-radius: var(--border-radius);
  margin-bottom: var(--spacing-lg);
  display: none;
}

.success-message.show {
  display: block;
}

/* Logo Grid (Partners) */
.logo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--spacing-xl);
  margin-top: var(--spacing-2xl);
  align-items: center;
}

.logo-item {
  background-color: var(--color-gray-50);
  padding: var(--spacing-lg);
  border-radius: var(--border-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100px;
  color: var(--color-gray-400);
  font-size: var(--font-size-sm);
}

/* Utility Classes */
.text-center {
  text-align: center;
}

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

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }
.mt-2xl { margin-top: var(--spacing-2xl); }

.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }
.mb-2xl { margin-bottom: var(--spacing-2xl); }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* Responsive Design */
@media (max-width: 768px) {
  :root {
    --font-size-5xl: 2.25rem;
    --font-size-4xl: 1.875rem;
    --font-size-3xl: 1.5rem;
    --spacing-4xl: 3rem;
    --spacing-3xl: 2rem;
  }
  
  .nav-toggle {
    display: block;
  }
  
  .hero > .container > div[style*="grid"] {
    grid-template-columns: 1fr !important;
  }
  
  .ceo-photo {
    max-width: 250px;
  }
  
  .image-placeholder--ceo {
    max-width: 250px;
    height: 250px;
  }
  
  .nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background-color: var(--color-white);
    flex-direction: column;
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-lg);
    transform: translateX(-100%);
    transition: transform var(--transition-base);
  }
  
  .nav.open {
    transform: translateX(0);
  }
  
  .nav__link {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--color-gray-200);
  }
  
  .hero--slider {
    min-height: 500px;
  }
  
  .hero-slider {
    min-height: 500px;
    height: 500px;
  }
  
  .hero-slide {
    height: 500px; /* 모바일에서도 고정 높이 */
  }
  
  .hero-slide__content {
    padding: var(--spacing-3xl) var(--container-padding) var(--spacing-lg);
    text-align: center;
    min-height: 300px; /* 모바일 최소 높이 */
  }
  
  .hero-slider__indicator {
    width: 30px; /* 모바일에서 약간 작게 */
    height: 6px;
  }
  
  .hero--slider .hero__title {
    font-size: var(--font-size-3xl);
  }
  
  .hero--slider .hero__subtitle {
    font-size: var(--font-size-lg);
  }
  
  .hero__cta {
    flex-direction: column;
  }
  
  .hero-slider__indicators {
    padding: var(--spacing-md) 0;
  }
  
  .btn {
    width: 100%;
  }
  
  .cards-grid {
    grid-template-columns: 1fr;
  }
  
  .process-steps {
    grid-template-columns: 1fr;
  }
  
  .category-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .footer__content {
    grid-template-columns: 1fr;
  }
  
  .contact-grid {
    grid-template-columns: 1fr;
  }
  
  .sticky-contact {
    display: block;
  }
}

@media (max-width: 480px) {
  .category-grid {
    grid-template-columns: 1fr;
  }
  
  .hero__title {
    font-size: var(--font-size-3xl);
  }
  
  .hero__subtitle {
    font-size: var(--font-size-lg);
  }
}