/* File: public/css/style.css */

/* ==========================================
   LUMINEX Solar Energy - 공통 스타일
   
   [업데이트 내역]
   - 중복 코드 제거
   - 드롭다운 메뉴 개선
   - 헤더 높이 보정
   - 유틸리티 클래스 추가
   
   [포함 내용]
   - CSS 변수 (색상, 타이포그래피, 간격, 효과)
   - 리셋 & 기본 스타일
   - 타이포그래피 (h1~h6, p, a, 리스트)
   - 폼 요소 (input, textarea, select, button)
   - 테이블 스타일
   - 헤더 (로고, 데스크톱/모바일 네비게이션)
   - 푸터
   - 버튼 컴포넌트
   - 섹션 타이틀 스타일
   - 컨테이너
   - 공통 애니메이션
   - 유틸리티 클래스
   
   [반응형 최적화]
   - 데스크톱: 1920px 기준 vw 단위 사용
   - 태블릿: 1024px 이하, 네비게이션 모바일로 전환
   - 모바일: 768px 이하, 모든 요소 터치 최적화
   - Ultra-wide: 2000px 이상, 최대 너비 제한
   
   [사용 페이지]
   모든 페이지 (메인, 회사소개, 사업분야 등)
   ========================================== */

/* ==========================================
   CSS VARIABLES
   ========================================== */
   :root {
    /* Colors */
    --primary-color: #F59E0B;
    --primary-dark: #D97706;
    --primary-light: #FCD34D;
    --secondary-color: #1E3A8A;
    --secondary-dark: #1E40AF;
    --accent-color: #FBBF24;

    --text-dark: #0F172A;
    --text-light: #64748B;
    --text-white: #FFFFFF;

    --bg-white: #FFFFFF;
    --bg-light: #F8FAFC;
    --bg-dark: #0F172A;
    --bg-overlay: rgba(15, 23, 42, 0.7);

    /* Typography */
    --font-primary: 'Orbitron', sans-serif;
    --font-secondary: 'Noto Sans KR', sans-serif;

    /* Spacing */
    --section-padding: 4vw;
    --container-width: 85vw;
    --max-width: 1400px;

    /* Header */
    --header-height: 80px;
    --header-scrolled-height: 70px;

    /* Effects */
    --transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.2);
}

/* ==========================================
   RESET & BASE STYLES
   ========================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

html {
    scroll-behavior: smooth;
    overflow-y: auto;
    overflow-x: hidden;
    height: 100%;
}

body {
    font-family: var(--font-secondary);
    color: var(--text-dark);
    line-height: 1.6;
    background: var(--bg-white);
    overflow-x: hidden;
    height: 100%;
    padding-top: var(--header-height);
}

body.scrolled {
    padding-top: var(--header-scrolled-height);
}

/* ==========================================
   TYPOGRAPHY
   ========================================== */

/* Headings */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-primary);
    font-weight: 700;
    line-height: 1.2;
    color: var(--secondary-color);
    margin-bottom: 1rem;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

/* Paragraphs */
p {
    margin-bottom: 1rem;
    line-height: 1.8;
}

/* Links */
a {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--primary-dark);
}

/* Lists */
ul, ol {
    padding-left: 2rem;
}

/* li {
    margin-bottom: 0.5rem;
} */

/* Strong & Emphasis */
strong, b { font-weight: 700; }
em, i { font-style: italic; }

/* Code */
code {
    background: var(--bg-light);
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    font-size: 0.9em;
}

pre {
    background: var(--bg-light);
    padding: 1rem;
    border-radius: 8px;
    overflow-x: auto;
    margin-bottom: 1rem;
}

/* Blockquote */
blockquote {
    border-left: 4px solid var(--primary-color);
    padding-left: 1rem;
    margin: 1rem 0;
    font-style: italic;
    color: var(--text-light);
}

/* Horizontal Rule */
hr {
    border: none;
    border-top: 2px solid var(--bg-light);
    margin: 2rem 0;
}

/* ==========================================
   FORM ELEMENTS
   ========================================== */

input[type="text"],
input[type="email"],
input[type="tel"],
input[type="password"],
input[type="number"],
input[type="url"],
input[type="search"],
textarea,
select {
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: 1rem;
    font-family: var(--font-secondary);
    color: var(--text-dark);
    background: var(--bg-white);
    border: 2px solid var(--bg-light);
    border-radius: 8px;
    transition: var(--transition);
}

input:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.1);
}

input::placeholder,
textarea::placeholder {
    color: var(--text-light);
    opacity: 0.6;
}

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

select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2364748B' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    padding-right: 2.5rem;
}

input[type="checkbox"],
input[type="radio"] {
    width: auto;
    margin-right: 0.5rem;
    cursor: pointer;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-dark);
}

.form-group {
    margin-bottom: 1.5rem;
}

input:disabled,
textarea:disabled,
select:disabled,
button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

input.error,
textarea.error,
select.error {
    border-color: #EF4444;
}

.error-message {
    color: #EF4444;
    font-size: 0.875rem;
    margin-top: 0.25rem;
}

/* ==========================================
   TABLE STYLES
   ========================================== */
table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 1.5rem;
    background: var(--bg-white);
}

thead {
    background: var(--bg-light);
}

th, td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--bg-light);
}

th {
    font-weight: 600;
    color: var(--secondary-color);
}

tbody tr:hover {
    background: var(--bg-light);
}

/* ==========================================
   IMAGES
   ========================================== */
img {
    max-width: 100%;
    height: auto;
    display: block;
}

.image-wrapper {
    position: relative;
    overflow: hidden;
    border-radius: 8px;
}

.image-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.image-wrapper:hover img {
    transform: scale(1.05);
}

.img-fluid {
    max-width: 100%;
    height: auto;
}

/* ==========================================
   CONTAINER
   ========================================== */
.container {
    width: var(--container-width);
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 2vw;
}

/* ==========================================
   BUTTONS
   ========================================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4vw;
    padding: 0.6vw 1.2vw;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.75vw;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    font-family: var(--font-secondary);
}

.btn-primary {
    background: var(--primary-color);
    color: var(--text-white);
    box-shadow: 0 4px 15px rgba(245, 158, 11, 0.4);
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(245, 158, 11, 0.5);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-white);
    border: 2px solid var(--text-white);
    backdrop-filter: blur(10px);
}

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

.btn-large {
    padding: 0.9vw 2.5vw;
    font-size: 1vw;
    box-shadow: 0 6px 25px rgba(245, 158, 11, 0.4);
}

.btn-large:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(245, 158, 11, 0.5);
}

/* ==========================================
   SECTION TITLE STYLES
   ========================================== */
.section-header {
    text-align: center;
    margin-bottom: 3vw;
}

.section-title {
    display: flex;
    flex-direction: column;
    gap: 0.5vw;
}

.title-small {
    font-family: var(--font-primary);
    font-size: 0.6vw;
    color: var(--primary-color);
    letter-spacing: 0.3em;
    font-weight: 700;
    text-transform: uppercase;
}

.title-main {
    font-family: var(--font-primary);
    font-size: 1.6vw;
    color: var(--secondary-color);
    font-weight: 800;
}

.section-description {
    font-size: 0.9vw;
    color: var(--text-light);
    margin-top: 0.5vw;
    line-height: 1.6;
}

/* ==========================================
   COMMON ANIMATIONS
   ========================================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

@keyframes spin {
    to { transform: rotate(360deg); }
}

@keyframes loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* ==========================================
   HEADER
   ========================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: var(--header-height);
    padding: 0;
    transition: var(--transition);
    background: linear-gradient(180deg, rgba(0, 0, 0, 0.4) 0%, transparent 100%);
}

/* 👇 서브페이지 헤더 - 단색 배경 */
.header.subpage {
    background: var(--secondary-color); /* 네이비 단색 */
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.15);
}

/* 서브페이지 헤더 - 텍스트 색상 */
.header.subpage .logo-text {
    color: var(--primary-color);
    text-shadow: none;
}

.header.subpage .logo-subtitle {
    color: rgba(255, 255, 255, 0.8);
}

.header.subpage .logo-image {
    filter: drop-shadow(0 2px 8px rgba(245, 158, 11, 0.4));
}

.header.subpage .nav-item > a {
    color: var(--text-white);
    text-shadow: none;
}

.header.subpage .nav-item > a:hover {
    color: var(--primary-color);
    background: rgba(255, 255, 255, 0.1);
}

.header.subpage .nav-item.active > a {
    color: var(--primary-color);
}

.header.subpage .mobile-menu-toggle span {
    background: var(--text-white);
    box-shadow: none;
}

/* 서브페이지 스크롤 시 (조금 더 어둡게) */
.header.subpage.scrolled {
    background: var(--secondary-dark);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}





.header.scrolled {
    height: var(--header-scrolled-height);
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.header-container {
    width: var(--container-width);
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 2vw;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;  /* 👈 이게 핵심! */
}

/* Logo */
.logo a {
    display: flex;
    align-items: center;
    gap: 0.8vw;
    text-decoration: none;
    transition: all 0.3s ease;
}

/* .logo-image {
    width: 2.5vw;
    height: 2.5vw;
    object-fit: contain;
    transition: all 0.3s ease;
    filter: drop-shadow(0 2px 8px rgba(245, 158, 11, 0.3));
} */

.logo-image {
    width: 40px;
    height: 40px;
    object-fit: contain;
    transition: all 0.3s ease;
    filter: drop-shadow(0 2px 8px rgba(245, 158, 11, 0.3));
}

.logo-text-wrapper {
    display: flex;
    flex-direction: column;
    gap: 0.2vw;
}

.logo-text {
    font-family: var(--font-primary);
    font-size: 20px;
    font-weight: 800;
    color: var(--primary-color);
    letter-spacing: 0.1em;
    text-shadow: 0 2px 10px rgba(245, 158, 11, 0.3);
}

.header.scrolled .logo-text {
    color: var(--secondary-color);
}

.logo-subtitle {
    font-size: 9px;
    color: var(--text-light);
    letter-spacing: 0.2em;
    text-transform: uppercase;
}

.logo a:hover .logo-image {
    transform: scale(1.1) rotate(5deg);
    filter: drop-shadow(0 4px 12px rgba(245, 158, 11, 0.6));
}

.logo a:hover .logo-text {
    color: var(--primary-light);
    transform: translateX(2px);
}

.logo a:hover .logo-subtitle {
    color: var(--primary-color);
}

.header.scrolled .logo-image {
    filter: drop-shadow(0 2px 8px rgba(30, 58, 138, 0.3));
}

.header.scrolled .logo a:hover .logo-image {
    filter: drop-shadow(0 4px 12px rgba(245, 158, 11, 0.5));
}

/* ==========================================
   DESKTOP NAVIGATION
   ========================================== */
.nav-desktop {
    display: flex;
    height: 100%;  /* 👈 추가! */
    align-items: center;  /* 👈 추가! */
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 1.5vw;
    align-items: center;
}

.nav-item {
    position: relative;
}

.nav-item > a {
    text-decoration: none;
    color: var(--text-white);
    font-weight: 500;
    font-size: 14px;
    padding: 8px 12px;
    transition: all 0.3s ease;
    display: block;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.8), 0 0 10px rgba(0, 0, 0, 0.5);
    border-radius: 6px;
    position: relative;
}

.header.scrolled .nav-item > a {
    color: var(--text-dark);
    text-shadow: none;
}

.nav-item > a:hover {
    color: var(--primary-color);
    background: rgba(245, 158, 11, 0.1);
}

.header.scrolled .nav-item > a:hover {
    background: rgba(245, 158, 11, 0.08);
}

/* Active Menu */
.nav-item.active > a {
    color: var(--primary-color);
    font-weight: 700;
}

.nav-item.active > a::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0.8vw;
    right: 0.8vw;
    height: 3px;
    background: var(--primary-color);
    border-radius: 2px;
}

.header.scrolled .nav-item.active > a {
    color: var(--primary-color);
}

/* Dropdown Arrow */
.nav-item.has-dropdown > a::after {
    content: '';
    display: inline-block;
    width: 0;
    height: 0;
    margin-left: 0.4vw;
    border-left: 4px solid transparent;
    border-right: 4px solid transparent;
    border-top: 4px solid currentColor;
    transition: var(--transition);
    vertical-align: middle;
}

.nav-item.has-dropdown:hover > a::after {
    transform: rotate(180deg);
}

/* ==========================================
   DROPDOWN MENU (개선 버전)
   ========================================== */
/* File: public/css/style.css */

/* ==========================================
   DROPDOWN MENU (개선 버전)
   ========================================== */
   .dropdown {
    position: absolute;
    top: calc(100% + 0.5vw);
    left: 0;
    background: var(--bg-white);
    list-style: none;
    min-width: 220px;
    padding: 0.5vw 0;  /* 👈 상하 패딩 추가 */
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);  /* 👈 그림자 강화 */
    opacity: 0;
    visibility: hidden;
    transform: translateY(-20px);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    /* border: 2px solid var(--primary-color);  👈 골드 테두리 추가 */
    overflow: hidden;
}

.nav-item.has-dropdown:hover .dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown li {
    border-bottom: 1px solid rgba(245, 158, 11, 0.1);  /* 👈 연한 골드 구분선 */
}

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

.dropdown li a {
    display: flex;
    align-items: center;
    gap: 0.8vw;
    padding: 14px 20px;
    color: var(--text-dark);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.dropdown li a::before {
    content: '▸';
    color: var(--primary-color);
    font-size: 12px;
    opacity: 0;
    transform: translateX(-5px);
    transition: var(--transition);
}

.dropdown li a:hover::before {
    opacity: 1;
    transform: translateX(0);
}

.dropdown li a:hover {
    background: linear-gradient(90deg, rgba(245, 158, 11, 0.15) 0%, rgba(245, 158, 11, 0.05) 100%);  /* 👈 그라데이션 배경 */
    color: var(--primary-color);
    padding-left: 28px;  /* 👈 화살표 공간 */
}

.dropdown li a.active {
    background: linear-gradient(90deg, rgba(245, 158, 11, 0.2) 0%, rgba(245, 158, 11, 0.08) 100%);
    color: var(--primary-color);
    font-weight: 700;
    border-left: 4px solid var(--primary-color);  /* 👈 왼쪽 액센트 바 */
}

/* Contact Button */
/* Contact Button */
.nav-contact {
    background: var(--primary-color);
    color: var(--text-white) !important;
    padding: 8px 16px !important;  /* 👈 vw → px로 고정 */
    border-radius: 50px;
    font-weight: 600;
    text-shadow: none !important;
    display: inline-flex;  /* 👈 추가 */
    align-items: center;  /* 👈 추가 */
}

.nav-contact:hover {
    background: var(--primary-dark) !important;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ==========================================
   MOBILE NAVIGATION
   ========================================== */

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    position: relative;
    z-index: 1001;
    width: 44px;
    height: 44px;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 6px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    margin-right: 4px;
}

.mobile-menu-toggle span {
    width: 26px;
    height: 3px;
    background: var(--text-white);
    transition: all 0.3s ease-in-out;
    border-radius: 3px;
    display: block;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.8);
}

.header.scrolled .mobile-menu-toggle span {
    background: var(--text-dark);
}

.mobile-menu-toggle.active {
    background: rgba(245, 158, 11, 0.15);
    border-radius: 8px;
}

.mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(7px, 7px);
    background: var(--primary-color) !important;
    width: 28px;
    height: 3.5px;
    box-shadow: 0 2px 6px rgba(245, 158, 11, 0.4) !important;
}

.mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0;
    transform: translateX(-25px);
}

.mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
    background: var(--primary-color) !important;
    width: 28px;
    height: 3.5px;
    box-shadow: 0 2px 6px rgba(245, 158, 11, 0.4) !important;
}

/* Mobile Menu */
.nav-mobile {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80vw;
    max-width: 400px;
    height: 100vh;
    background: #FFFFFF;
    box-shadow: var(--shadow-xl);
    transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    overflow-y: auto;
    padding-top: 80px;
    z-index: 999;
}

.nav-mobile.active {
    right: 0;
}

.nav-menu-mobile {
    list-style: none;
    padding: 2vw 4vw;
    background: #FFFFFF;
}

.nav-item-mobile {
    border-bottom: 2px solid #E5E7EB;
}

.nav-item-mobile:last-child {
    border-bottom: none;
}

.nav-item-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1vw 0;
}

.nav-item-header > a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 600;
    font-size: 4vw;
    flex: 1;
}

.dropdown-toggle {
    background: none;
    border: none;
    font-size: 5vw;
    color: var(--primary-color);
    cursor: pointer;
    padding: 0 2vw;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
}

.dropdown-toggle.active {
    transform: rotate(180deg);
    background: rgba(245, 158, 11, 0.1);
    border-radius: 50%;
}

.dropdown-mobile {
    list-style: none;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    background: var(--bg-light);
    border-radius: 8px;
    margin-top: 2vw;
}

.dropdown-mobile.active {
    max-height: 600px;
    padding: 2vw 0;
}

.dropdown-mobile li {
    padding: 2.5vw 0 2.5vw 6vw;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.dropdown-mobile li:last-child {
    border-bottom: none;
}

.dropdown-mobile li a {
    text-decoration: none;
    color: var(--text-dark);
    font-size: 3.5vw;
    font-weight: 500;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 2vw;
}

.dropdown-mobile li a::before {
    content: '▸';
    color: var(--primary-color);
    font-size: 3vw;
}

.dropdown-mobile li a:hover,
.dropdown-mobile li a.active {
    color: var(--primary-color);
    font-weight: 700;
    padding-left: 1vw;
}

.nav-contact-mobile {
    display: block;
    text-align: center;
    background: var(--primary-color);
    color: var(--text-white) !important;
    padding: 4vw !important;
    border-radius: 50px;
    font-weight: 600;
    font-size: 4vw !important;
    margin-top: 3vw;
}

/* Mobile Menu Overlay */
body::after {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 998;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease-in-out;
}

body.mobile-menu-open::after {
    opacity: 1;
    pointer-events: auto;
}

/* ==========================================
   FOOTER
   ========================================== */
.footer {
    background: var(--bg-dark);
    color: var(--text-white);
    padding: 4vw 0 2vw;
}

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

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 1vw;
}

.footer-logo-container {
    display: flex;
    align-items: center;
    gap: 0.8vw;
    margin-bottom: 0.8vw;
}

.footer-logo-image {
    width: 3vw;
    height: 3vw;
    object-fit: contain;
    filter: drop-shadow(0 2px 8px rgba(245, 158, 11, 0.4));
}

.footer-logo .logo-text {
    font-family: var(--font-primary);
    font-size: 1.5vw;
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: 0.2vw;
}

.footer-logo .logo-subtitle {
    font-size: 0.6vw;
    color: var(--text-light);
    letter-spacing: 0.2em;
    text-transform: uppercase;
    margin-bottom: 0.8vw;
}

.footer-description {
    font-size: 0.85vw;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.8;
}

.footer-social {
    display: flex;
    gap: 1vw;
    margin-top: 1.5vw;
}

.social-link {
    width: 2.5vw;
    height: 2.5vw;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: var(--text-white);
    transition: var(--transition);
}

.social-link:hover {
    background: var(--primary-color);
    transform: translateY(-2px);
}

.social-link svg {
    width: 1.2vw;
    height: 1.2vw;
}

.footer-links {
    display: flex;
    align-items: center;
    justify-content: flex-end;
}

.footer-menu {
    display: flex;
    flex-direction: column;
    gap: 0.8vw;
}

.footer-menu a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-size: 0.85vw;
    transition: var(--transition);
}

.footer-menu a:hover {
    color: var(--primary-color);
    padding-left: 0.5vw;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 2vw;
}

.footer-info p {
    font-size: 0.75vw;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 0.3vw;
}

.footer-copyright p {
    font-size: 0.75vw;
    color: rgba(255, 255, 255, 0.6);
}

/* ==========================================
   UTILITY CLASSES
   ========================================== */

/* Text Alignment */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }
.text-justify { text-align: justify; }

/* Margin */
.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }
.mt-3 { margin-top: 3rem; }
.mt-4 { margin-top: 4rem; }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 1rem; }
.mb-2 { margin-bottom: 2rem; }
.mb-3 { margin-bottom: 3rem; }
.mb-4 { margin-bottom: 4rem; }

.my-0 { margin-top: 0; margin-bottom: 0; }
.my-1 { margin-top: 1rem; margin-bottom: 1rem; }
.my-2 { margin-top: 2rem; margin-bottom: 2rem; }
.my-3 { margin-top: 3rem; margin-bottom: 3rem; }
.my-4 { margin-top: 4rem; margin-bottom: 4rem; }

/* Padding */
.p-0 { padding: 0; }
.p-1 { padding: 1rem; }
.p-2 { padding: 2rem; }
.p-3 { padding: 3rem; }
.p-4 { padding: 4rem; }

/* Display */
.d-none { display: none; }
.d-block { display: block; }
.d-flex { display: flex; }
.d-grid { display: grid; }

/* Flex */
.flex-column { flex-direction: column; }
.flex-row { flex-direction: row; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.align-center { align-items: center; }
.gap-1 { gap: 1rem; }
.gap-2 { gap: 2rem; }
.gap-3 { gap: 3rem; }

/* Width */
.w-100 { width: 100%; }
.w-50 { width: 50%; }
.w-auto { width: auto; }

/* Text Colors */
.text-primary { color: var(--primary-color); }
.text-secondary { color: var(--secondary-color); }
.text-muted { color: var(--text-light); }
.text-white { color: var(--text-white); }

/* Content */
.content-box {
    background: var(--bg-white);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
}

.content-spacing > * + * {
    margin-top: 1.5rem;
}

.lead {
    font-size: 1.25rem;
    font-weight: 500;
    line-height: 1.8;
    color: var(--text-dark);
}

.text-small {
    font-size: 0.875rem;
}

/* Loading */
.loading-spinner {
    display: inline-block;
    width: 40px;
    height: 40px;
    border: 4px solid var(--bg-light);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.skeleton {
    background: linear-gradient(90deg, var(--bg-light) 25%, #E2E8F0 50%, var(--bg-light) 75%);
    background-size: 200% 100%;
    animation: loading 1.5s ease-in-out infinite;
}

/* Visibility */
.mobile-only { display: none; }
.desktop-only { display: block; }

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

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

/* ==========================================
   PAGE FIXES
   ========================================== */

.page-hero-section {
    margin-top: 0 !important;
}

.link-underline {
    position: relative;
    text-decoration: none;
}

.link-underline::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition);
}

.link-underline:hover::after {
    width: 100%;
}

/* ==========================================
   RESPONSIVE DESIGN
   ========================================== */

/* Tablet (1024px 이하) */
@media (max-width: 1024px) {
    :root {
        --section-padding: 6vw;
        --container-width: 90vw;
        --header-height: 60px;
    }

    body {
        padding-top: var(--header-height);
    }

    .header {
        height: var(--header-height);
    }

    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    h3 { font-size: 1.5rem; }
    h4 { font-size: 1.25rem; }
    h5 { font-size: 1.1rem; }
    h6 { font-size: 1rem; }

    .nav-desktop {
        display: none;
    }

    .mobile-menu-toggle {
        display: flex !important;
    }

    .desktop-only {
        display: none;
    }
    
    .mobile-only {
        display: block;
    }

    .logo-image {
        width: 35px;
        height: 35px;
    }

    .logo-text {
        font-size: 18px;
    }

    .logo-subtitle {
        font-size: 8px;
    }

    .btn {
        padding: 2vw 4vw;
        font-size: 2vw;
    }

    .btn-large {
        padding: 2.5vw 5vw;
        font-size: 2.5vw;
    }

    .title-small {
        font-size: 2vw;
    }

    .title-main {
        font-size: 4vw;
    }

    .section-description {
        font-size: 2vw;
    }

    .footer-logo-image {
        width: 10vw;
        height: 10vw;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 4vw;
    }

    .footer-logo .logo-text {
        font-size: 4vw;
    }

    .footer-logo .logo-subtitle {
        font-size: 2vw;
    }

    .footer-description {
        font-size: 2.2vw;
    }

    .social-link {
        width: 8vw;
        height: 8vw;
    }

    .social-link svg {
        width: 4vw;
        height: 4vw;
    }

    .footer-links {
        justify-content: flex-start;
    }

    .footer-menu {
        gap: 2vw;
    }

    .footer-menu a {
        font-size: 2.2vw;
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
        gap: 2vw;
    }

    .footer-info p,
    .footer-copyright p {
        font-size: 2vw;
    }
}

/* Mobile (768px 이하) */
@media (max-width: 768px) {
    :root {
        --section-padding: 8vw;
        --container-width: 92vw;
        --header-height: 55px;
    }

    body {
        padding-top: var(--header-height);
    }

    .header {
        height: var(--header-height);
        padding: 0;
    }

    h1 { font-size: 1.75rem; }
    h2 { font-size: 1.5rem; }
    h3 { font-size: 1.25rem; }
    h4 { font-size: 1.1rem; }
    h5 { font-size: 1rem; }
    h6 { font-size: 0.9rem; }

    p {
        font-size: 0.95rem;
    }

    table {
        display: block;
        overflow-x: auto;
    }

    input[type="text"],
    input[type="email"],
    input[type="tel"],
    input[type="password"],
    input[type="number"],
    input[type="url"],
    input[type="search"],
    textarea,
    select {
        font-size: 16px;
        padding: 12px 16px;
    }

    .logo-image {
        width: 32px;
        height: 32px;
    }

    .logo a {
        gap: 2vw;
    }

    .logo-text {
        font-size: 16px;
    }

    .logo-subtitle {
        font-size: 7px;
    }

    .btn {
        padding: 3vw 5vw;
        font-size: 3vw;
    }

    .btn-large {
        padding: 4vw 8vw;
        font-size: 4vw;
        width: 100%;
        justify-content: center;
    }

    .title-small {
        font-size: 2.5vw;
    }

    .title-main {
        font-size: 5vw;
    }

    .section-description {
        font-size: 3vw;
    }

    .footer {
        padding: 8vw 0 5vw;
    }

    .footer-logo-image {
        width: 12vw;
        height: 12vw;
    }

    .footer-logo-container {
        gap: 2vw;
    }

    .footer-logo .logo-text {
        font-size: 5vw;
    }

    .footer-logo .logo-subtitle {
        font-size: 2.5vw;
    }

    .footer-description {
        font-size: 3vw;
        margin-bottom: 3vw;
    }

    .footer-social {
        gap: 2.5vw;
        margin-top: 3vw;
    }

    .social-link {
        width: 10vw;
        height: 10vw;
    }

    .social-link svg {
        width: 5vw;
        height: 5vw;
    }

    .footer-menu {
        gap: 2.5vw;
        flex-direction: row;
        flex-wrap: wrap;
    }

    .footer-menu a {
        font-size: 3vw;
    }

    .footer-bottom {
        margin-top: 5vw;
        padding-top: 5vw;
    }

    .footer-info p,
    .footer-copyright p {
        font-size: 2.5vw;
        margin-bottom: 1vw;
    }

    .mt-1, .my-1 { margin-top: 0.75rem; }
    .mt-2, .my-2 { margin-top: 1.25rem; }
    .mt-3, .my-3 { margin-top: 2rem; }
    .mt-4, .my-4 { margin-top: 2.5rem; }

    .mb-1, .my-1 { margin-bottom: 0.75rem; }
    .mb-2, .my-2 { margin-bottom: 1.25rem; }
    .mb-3, .my-3 { margin-bottom: 2rem; }
    .mb-4, .my-4 { margin-bottom: 2.5rem; }
}

/* Ultra-wide screens (2000px 이상) */
@media (min-width: 2000px) {
    :root {
        --container-width: 1600px;
    }
}

@media (min-width: 1025px) {
    .mobile-menu-toggle {
        display: none !important;
    }
}

/* ==========================================
   PRINT STYLES
   ========================================== */
@media print {
    .header,
    .footer,
    .mobile-menu-toggle,
    .nav-mobile {
        display: none !important;
    }

    body {
        padding-top: 0;
    }

    a {
        text-decoration: underline;
    }
}