/**
 * style.css - 차수막 공사 메인 스타일시트
 * Cosmic Theme + Personal Capital Inspired Design
 *
 * @package ChasuMak
 * @version 1.0.0
 */

/* ========================================
   CSS Custom Properties (Variables)
   ======================================== */
:root {
    /* Cosmic Color Scheme */
    --primary: #667eea;
    --primary-dark: #5a67d8;
    --primary-light: #7c8cf0;
    --secondary: #764ba2;
    --secondary-dark: #6b4190;
    --secondary-light: #8b5cb8;
    --accent: #f093fb;
    --accent-cyan: #06d6a0;
    --accent-blue: #118ab2;

    /* Personal Capital Blue */
    --pc-blue: #0064FF;
    --pc-blue-dark: #0050cc;
    --pc-blue-light: #3385ff;

    /* Cosmic Gradients */
    --gradient-cosmic: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-cosmic-dark: linear-gradient(135deg, #5a67d8 0%, #6b4190 100%);
    --gradient-aurora: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
    --gradient-nebula: linear-gradient(180deg, #0a0a1a 0%, #1a1a3a 50%, #2a2a5a 100%);
    --gradient-card: linear-gradient(145deg, rgba(255,255,255,0.05) 0%, rgba(255,255,255,0.02) 100%);

    /* Text Colors */
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.85);
    --text-muted: rgba(255, 255, 255, 0.6);
    --text-dark: #1a1a2e;
    --text-dark-secondary: #4a4a6a;

    /* Background Colors */
    --bg-dark: #0a0a1a;
    --bg-darker: #050510;
    --bg-card: rgba(255, 255, 255, 0.05);
    --bg-card-hover: rgba(255, 255, 255, 0.1);
    --bg-white: #ffffff;
    --bg-light: #f8f9fc;

    /* Border & Shadow */
    --border-light: rgba(255, 255, 255, 0.1);
    --border-medium: rgba(255, 255, 255, 0.2);
    --shadow-cosmic: 0 20px 60px rgba(102, 126, 234, 0.3);
    --shadow-card: 0 10px 40px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 40px rgba(102, 126, 234, 0.4);

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 5rem;

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 30px;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    --transition-bounce: 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);

    /* Z-Index Scale */
    --z-background: -1;
    --z-default: 1;
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-fixed: 300;
    --z-modal: 400;
    --z-tooltip: 500;
}

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

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

body {
    font-family: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-weight: 400;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-dark);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-normal);
}

ul, ol {
    list-style: none;
}

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

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

input, textarea, select {
    font-family: inherit;
    font-size: inherit;
}

/* ========================================
   Cosmic Background Effects
   ======================================== */
.cosmic-background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: var(--z-background);
    overflow: hidden;
    background: var(--bg-dark);
}

.stars,
.stars2,
.stars3 {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-repeat: repeat;
}

.stars {
    background-image: radial-gradient(2px 2px at 20px 30px, rgba(255,255,255,0.8), transparent),
                      radial-gradient(2px 2px at 40px 70px, rgba(255,255,255,0.6), transparent),
                      radial-gradient(1px 1px at 90px 40px, rgba(255,255,255,0.9), transparent),
                      radial-gradient(2px 2px at 160px 120px, rgba(255,255,255,0.7), transparent),
                      radial-gradient(1px 1px at 230px 80px, rgba(255,255,255,0.5), transparent);
    background-size: 300px 300px;
    animation: twinkle 4s ease-in-out infinite;
}

.stars2 {
    background-image: radial-gradient(1px 1px at 50px 50px, rgba(255,255,255,0.6), transparent),
                      radial-gradient(2px 2px at 100px 150px, rgba(255,255,255,0.4), transparent),
                      radial-gradient(1px 1px at 180px 90px, rgba(255,255,255,0.7), transparent),
                      radial-gradient(2px 2px at 250px 200px, rgba(255,255,255,0.5), transparent);
    background-size: 400px 400px;
    animation: twinkle 6s ease-in-out infinite 2s;
}

.stars3 {
    background-image: radial-gradient(2px 2px at 70px 120px, rgba(102,126,234,0.6), transparent),
                      radial-gradient(1px 1px at 140px 60px, rgba(118,75,162,0.5), transparent),
                      radial-gradient(2px 2px at 200px 180px, rgba(240,147,251,0.4), transparent);
    background-size: 500px 500px;
    animation: twinkle 8s ease-in-out infinite 4s;
}

.cosmic-gradient {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(ellipse at 20% 80%, rgba(102, 126, 234, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(118, 75, 162, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 50%, rgba(240, 147, 251, 0.05) 0%, transparent 70%);
    animation: nebula 20s ease-in-out infinite;
}

@keyframes twinkle {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

@keyframes nebula {
    0%, 100% {
        transform: scale(1) rotate(0deg);
    }
    50% {
        transform: scale(1.1) rotate(5deg);
    }
}

/* ========================================
   Header Styles
   ======================================== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: var(--z-fixed);
    background: rgba(10, 10, 26, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-light);
    transition: var(--transition-normal);
}

.site-header.scrolled {
    background: rgba(10, 10, 26, 0.95);
    box-shadow: var(--shadow-cosmic);
}

.header-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
}

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

.logo-icon {
    width: 45px;
    height: 45px;
}

.logo-icon svg {
    width: 100%;
    height: 100%;
}

.logo-text {
    font-size: 1.4rem;
    font-weight: 700;
    background: var(--gradient-cosmic);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Main Navigation */
.main-nav {
    display: flex;
    align-items: center;
}

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

.nav-item {
    position: relative;
}

.nav-item > a {
    display: block;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    transition: var(--transition-normal);
}

.nav-item > a:hover,
.nav-item.active > a {
    color: var(--text-primary);
    background: var(--bg-card);
}

.nav-item.active > a {
    background: var(--gradient-cosmic);
}

/* Dropdown Menu */
.has-dropdown {
    position: relative;
}

.has-dropdown > a::after {
    content: '';
    display: inline-block;
    width: 6px;
    height: 6px;
    margin-left: 8px;
    border-right: 2px solid currentColor;
    border-bottom: 2px solid currentColor;
    transform: rotate(45deg) translateY(-2px);
    transition: var(--transition-fast);
}

.has-dropdown:hover > a::after {
    transform: rotate(-135deg) translateY(-2px);
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(10px);
    min-width: 200px;
    padding: var(--spacing-sm);
    background: rgba(20, 20, 40, 0.98);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-card);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-normal);
}

.has-dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.dropdown-menu li a {
    display: block;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.9rem;
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
}

.dropdown-menu li a:hover {
    color: var(--text-primary);
    background: var(--bg-card);
    padding-left: calc(var(--spacing-md) + 5px);
}

/* Header Actions */
.header-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.btn-quote {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--gradient-cosmic);
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.9rem;
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-cosmic);
    transition: var(--transition-normal);
}

.btn-quote:hover {
    transform: translateY(-2px);
    box-shadow: 0 25px 70px rgba(102, 126, 234, 0.4);
}

.btn-quote svg {
    width: 18px;
    height: 18px;
    transition: var(--transition-fast);
}

.btn-quote:hover svg {
    transform: translateX(5px);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 28px;
    height: 20px;
    padding: 0;
}

.mobile-menu-toggle span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition-normal);
}

.mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

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

.mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

/* ========================================
   Mobile Menu
   ======================================== */
.mobile-menu {
    position: fixed;
    top: 80px;
    left: 0;
    width: 100%;
    height: calc(100vh - 80px);
    background: rgba(10, 10, 26, 0.98);
    backdrop-filter: blur(20px);
    transform: translateX(100%);
    transition: var(--transition-normal);
    z-index: var(--z-fixed);
    overflow-y: auto;
}

.mobile-menu.active {
    transform: translateX(0);
}

.mobile-menu-inner {
    padding: var(--spacing-lg);
}

.mobile-nav-menu li {
    border-bottom: 1px solid var(--border-light);
}

.mobile-nav-menu > li > a {
    display: block;
    padding: var(--spacing-md) 0;
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--text-primary);
}

.mobile-nav-menu .has-submenu > a {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.mobile-nav-menu .has-submenu > a::after {
    content: '+';
    font-size: 1.5rem;
    font-weight: 300;
    transition: var(--transition-fast);
}

.mobile-nav-menu .has-submenu.open > a::after {
    transform: rotate(45deg);
}

.mobile-nav-menu .submenu {
    display: none;
    padding-left: var(--spacing-md);
}

.mobile-nav-menu .has-submenu.open .submenu {
    display: block;
}

.mobile-nav-menu .submenu a {
    display: block;
    padding: var(--spacing-sm) 0;
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.mobile-contact {
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border-light);
}

.mobile-phone {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: var(--gradient-cosmic);
    color: var(--text-primary);
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    justify-content: center;
}

.mobile-phone svg {
    width: 24px;
    height: 24px;
}

/* ========================================
   Main Content Area
   ======================================== */
.site-main {
    position: relative;
    z-index: var(--z-default);
    min-height: 100vh;
    padding-top: 80px;
}

/* ========================================
   Hero Slider - 3D Rotating Effect
   ======================================== */
.hero-section {
    position: relative;
    height: 100vh;
    min-height: 600px;
    overflow: hidden;
    background: var(--bg-dark);
}

.hero-slider {
    position: relative;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.slider-wrapper {
    position: relative;
    width: 100%;
    height: 100%;
}

.slider-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    transform-style: preserve-3d;
    transform-origin: center center;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    opacity: 0;
    visibility: hidden;
}

.slider-slide:first-child {
    opacity: 1;
    visibility: visible;
}

.slider-slide.active {
    opacity: 1;
    visibility: visible;
}

.slide-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover !important;
    background-position: center !important;
}

/* Overlay */
.slide-bg::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        135deg,
        rgba(10, 10, 26, 0.92) 0%,
        rgba(10, 10, 26, 0.75) 50%,
        rgba(102, 126, 234, 0.25) 100%
    );
    z-index: 1;
}

/* Slide Content */
.slide-content {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    z-index: 10;
    padding: 40px 20px;
}

.slide-content > * {
    max-width: 900px;
    width: 100%;
}

.slide-badge {
    display: inline-block;
    padding: 12px 28px;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.4) 0%, rgba(118, 75, 162, 0.4) 100%);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 600;
    color: #a5b4fc;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 24px;
}

.slide-title {
    font-size: clamp(2.2rem, 5vw, 4rem);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 24px;
    color: #ffffff;
}

.slide-title .gradient-text {
    background: linear-gradient(135deg, #667eea 0%, #a78bfa 50%, #f093fb 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.slide-desc {
    font-size: 1.15rem;
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.8;
    margin-bottom: 36px;
}

.slide-buttons {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

.slide-buttons .btn {
    padding: 16px 36px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 50px;
    transition: all 0.3s ease;
    text-decoration: none;
}

.slide-buttons .btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
}

.slide-buttons .btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 35px rgba(102, 126, 234, 0.5);
}

.slide-buttons .btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.slide-buttons .btn-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.5);
}

.slide-buttons .btn svg {
    width: 20px;
    height: 20px;
    margin-left: 8px;
    vertical-align: middle;
}

/* Slide Copyright */
.slide-copyright {
    position: absolute;
    bottom: 20px;
    right: 30px;
    font-size: 12px;
    color: rgba(255, 255, 255, 0.5);
    z-index: 15;
    letter-spacing: 0.5px;
}

/* Slider Navigation Dots */
.slider-nav {
    position: absolute;
    bottom: 80px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 12px;
    z-index: 20;
}

.slider-dot {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    border: 2px solid rgba(255, 255, 255, 0.5);
    cursor: pointer;
    transition: all 0.3s ease;
    padding: 0;
}

.slider-dot:hover {
    background: rgba(255, 255, 255, 0.5);
}

.slider-dot.active {
    background: #667eea;
    border-color: #667eea;
    box-shadow: 0 0 15px rgba(102, 126, 234, 0.6);
    transform: scale(1.2);
}

/* Slider Arrows */
.slider-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 56px;
    height: 56px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    z-index: 20;
    padding: 0;
}

.slider-arrow:hover {
    background: #667eea;
    border-color: #667eea;
}

.slider-arrow svg {
    width: 24px;
    height: 24px;
    stroke: white;
}

.slider-arrow.prev,
.slider-arrow.slider-prev {
    left: 24px;
}

.slider-arrow.next,
.slider-arrow.slider-next {
    right: 24px;
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    z-index: 20;
}

.scroll-mouse {
    width: 26px;
    height: 42px;
    border: 2px solid rgba(255, 255, 255, 0.4);
    border-radius: 15px;
    position: relative;
}

.scroll-wheel {
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background: #667eea;
    border-radius: 2px;
    animation: scrollAnim 1.5s ease-in-out infinite;
}

@keyframes scrollAnim {
    0% { transform: translateX(-50%) translateY(0); opacity: 1; }
    100% { transform: translateX(-50%) translateY(12px); opacity: 0; }
}

.scroll-indicator span {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: rgba(255, 255, 255, 0.4);
}

/* Mobile */
@media (max-width: 768px) {
    .slider-arrow {
        width: 44px;
        height: 44px;
    }
    .slider-arrow.prev, .slider-arrow.slider-prev { left: 12px; }
    .slider-arrow.next, .slider-arrow.slider-next { right: 12px; }
    .slider-arrow svg {
        width: 20px;
        height: 20px;
    }
    .slide-buttons .btn {
        padding: 14px 28px;
        font-size: 0.95rem;
    }
    .slider-nav {
        bottom: 60px;
    }
}

/* ========================================
   Section Styles
   ======================================== */
.section {
    padding: var(--spacing-xxl) 0;
}

.section-dark {
    background: var(--bg-darker);
}

.section-gradient {
    background: var(--gradient-nebula);
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.container-narrow {
    max-width: 900px;
}

.container-wide {
    max-width: 1600px;
}

/* Section Headers */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xxl);
}

.section-badge {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--primary-light);
    margin-bottom: var(--spacing-md);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.section-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

.section-title .gradient-text {
    background: var(--gradient-cosmic);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-desc {
    font-size: 1.1rem;
    color: var(--text-muted);
    max-width: 700px;
    margin: 0 auto;
}

/* ========================================
   Card Styles
   ======================================== */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    transition: var(--transition-normal);
}

.card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-medium);
    transform: translateY(-5px);
    box-shadow: var(--shadow-cosmic);
}

.card-glow {
    position: relative;
    overflow: hidden;
}

.card-glow::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: conic-gradient(from 0deg, transparent, var(--primary), transparent 30%);
    animation: card-rotate 4s linear infinite;
    opacity: 0;
    transition: var(--transition-normal);
}

.card-glow:hover::before {
    opacity: 0.3;
}

@keyframes card-rotate {
    100% { transform: rotate(360deg); }
}

.card-icon {
    width: 70px;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-cosmic);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
    font-size: 2rem;
}

.card-title {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.card-text {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* ========================================
   Button Styles
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    transition: var(--transition-normal);
    cursor: pointer;
}

.btn-primary {
    background: var(--gradient-cosmic);
    color: var(--text-primary);
    box-shadow: var(--shadow-cosmic);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 25px 70px rgba(102, 126, 234, 0.5);
}

.btn-secondary {
    background: var(--bg-card);
    color: var(--text-primary);
    border: 1px solid var(--border-medium);
}

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

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

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

.btn-lg {
    padding: var(--spacing-lg) var(--spacing-xxl);
    font-size: 1.1rem;
}

.btn-sm {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.9rem;
}

.btn svg {
    width: 20px;
    height: 20px;
    transition: var(--transition-fast);
}

.btn:hover svg {
    transform: translateX(5px);
}

/* ========================================
   Footer Styles
   ======================================== */
.site-footer {
    position: relative;
    z-index: var(--z-default);
    background: var(--bg-darker);
    border-top: 1px solid var(--border-light);
}

.footer-top {
    padding: var(--spacing-xxl) 0;
}

.footer-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.footer-top .footer-container {
    display: grid;
    grid-template-columns: 1.2fr 2fr;
    gap: var(--spacing-xxl);
}

/* Footer Brand */
.footer-brand {
    max-width: 350px;
}

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

.footer-logo .logo-icon {
    width: 40px;
    height: 40px;
}

.footer-logo span {
    font-size: 1.3rem;
    font-weight: 700;
    background: var(--gradient-cosmic);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-desc {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
}

.footer-certifications {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.cert-badge {
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--primary-light);
}

/* Footer Links */
.footer-links {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-xl);
}

.footer-column h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--primary);
    display: inline-block;
}

.footer-column ul li {
    margin-bottom: var(--spacing-sm);
}

.footer-column ul li a {
    font-size: 0.9rem;
    color: var(--text-muted);
    transition: var(--transition-fast);
}

.footer-column ul li a:hover {
    color: var(--primary-light);
    padding-left: 5px;
}

/* Footer Contact */
.footer-contact .contact-list li {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
}

.footer-contact .contact-list svg {
    width: 18px;
    height: 18px;
    color: var(--primary);
    flex-shrink: 0;
    margin-top: 2px;
}

.footer-contact .contact-list a,
.footer-contact .contact-list span {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.footer-contact .contact-list a:hover {
    color: var(--primary-light);
}

/* Footer Social */
.footer-social {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.social-link {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    transition: var(--transition-normal);
}

.social-link:hover {
    background: var(--gradient-cosmic);
    border-color: transparent;
    color: var(--text-primary);
    transform: translateY(-3px);
}

.social-link svg {
    width: 18px;
    height: 18px;
}

/* Footer Bottom */
.footer-bottom {
    padding: var(--spacing-md) 0;
    border-top: 1px solid var(--border-light);
}

.footer-bottom .footer-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-md);
}

.footer-legal {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--spacing-md);
}

.footer-legal p {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.legal-links {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.85rem;
}

.legal-links a {
    color: var(--text-muted);
}

.legal-links a:hover {
    color: var(--primary-light);
}

.legal-links span {
    color: var(--border-light);
}

.footer-info p {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ========================================
   Floating Buttons
   ======================================== */
.floating-buttons {
    position: fixed;
    bottom: 30px;
    right: 30px;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    z-index: var(--z-fixed);
}

.float-btn {
    width: 55px;
    height: 55px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-card);
    transition: var(--transition-normal);
}

.float-btn svg {
    width: 24px;
    height: 24px;
}

.phone-btn {
    background: var(--accent-cyan);
    color: var(--bg-dark);
}

.phone-btn:hover {
    background: #05c494;
    transform: translateY(-3px) scale(1.1);
}

.quote-btn {
    background: var(--gradient-cosmic);
    color: var(--text-primary);
}

.quote-btn:hover {
    transform: translateY(-3px) scale(1.1);
    box-shadow: var(--shadow-cosmic);
}

.top-btn {
    background: var(--bg-card);
    color: var(--text-primary);
    border: 1px solid var(--border-light);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
}

.top-btn.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.top-btn:hover {
    background: var(--gradient-cosmic);
    border-color: transparent;
}

/* ========================================
   Form Styles
   ======================================== */
.form-group {
    margin-bottom: var(--spacing-md);
}

.form-label {
    display: block;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
}

.form-label.required::after {
    content: '*';
    color: var(--accent);
    margin-left: 4px;
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: var(--spacing-md);
    background: #1a1a3a;
    border: 2px solid rgba(102, 126, 234, 0.3);
    border-radius: var(--radius-md);
    color: #ffffff;
    font-size: 1rem;
    font-weight: 500;
    transition: var(--transition-normal);
}

.form-input:hover,
.form-textarea:hover,
.form-select:hover {
    border-color: rgba(102, 126, 234, 0.6);
    background: #1f1f4a;
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.2);
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--text-muted);
}

.form-textarea {
    min-height: 150px;
    resize: vertical;
}

.form-select {
    cursor: pointer;
    appearance: none;
    background-color: #1a1a3a;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%23ffffff' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 15px center;
    background-size: 18px;
    padding-right: 45px;
}

/* Select option 스타일 - 브라우저 호환성 */
.form-select option {
    background-color: #1a1a3a;
    color: #ffffff;
    padding: 12px;
}

.form-select option:hover,
.form-select option:focus,
.form-select option:checked {
    background-color: #667eea;
    color: #ffffff;
}

.form-checkbox {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    cursor: pointer;
}

.form-checkbox input {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    accent-color: var(--primary);
}

.form-checkbox span {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.5;
}

.form-error {
    font-size: 0.85rem;
    color: #ef4444;
    margin-top: var(--spacing-xs);
}

/* ========================================
   Grid System
   ======================================== */
.grid {
    display: grid;
    gap: var(--spacing-lg);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

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

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

.gradient-text {
    background: var(--gradient-cosmic);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mt-4 { margin-top: var(--spacing-xl); }
.mt-5 { margin-top: var(--spacing-xxl); }

.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.mb-4 { margin-bottom: var(--spacing-xl); }
.mb-5 { margin-bottom: var(--spacing-xxl); }

.pt-1 { padding-top: var(--spacing-sm); }
.pt-2 { padding-top: var(--spacing-md); }
.pt-3 { padding-top: var(--spacing-lg); }
.pt-4 { padding-top: var(--spacing-xl); }
.pt-5 { padding-top: var(--spacing-xxl); }

.pb-1 { padding-bottom: var(--spacing-sm); }
.pb-2 { padding-bottom: var(--spacing-md); }
.pb-3 { padding-bottom: var(--spacing-lg); }
.pb-4 { padding-bottom: var(--spacing-xl); }
.pb-5 { padding-bottom: var(--spacing-xxl); }

/* ========================================
   Scrollbar Styles
   ======================================== */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-dark);
}

::-webkit-scrollbar-thumb {
    background: var(--primary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
}

/* ========================================
   Selection Styles
   ======================================== */
::selection {
    background: var(--primary);
    color: var(--text-primary);
}

::-moz-selection {
    background: var(--primary);
    color: var(--text-primary);
}

/* ========================================
   Glossary Page Styles
   ======================================== */
.section-glossary-search {
    padding: var(--spacing-lg) 0;
}

.glossary-search-box {
    position: relative;
    max-width: 500px;
    margin: 0 auto var(--spacing-lg);
}

.glossary-search-input {
    width: 100%;
    padding: 16px 50px 16px 24px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-full);
    color: var(--text-primary);
    font-size: 1rem;
    transition: var(--transition-normal);
}

.glossary-search-input:focus {
    outline: none;
    border-color: var(--primary);
    background: rgba(255, 255, 255, 0.1);
}

.glossary-search-input::placeholder {
    color: var(--text-muted);
}

.glossary-search-box .search-icon {
    position: absolute;
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
    width: 20px;
    height: 20px;
    stroke: var(--text-muted);
    pointer-events: none;
}

.glossary-categories {
    display: flex;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
}

.glossary-cat-btn {
    padding: 10px 24px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: var(--radius-full);
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-normal);
}

.glossary-cat-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.3);
}

.glossary-cat-btn.active {
    background: var(--gradient-cosmic);
    border-color: transparent;
    color: white;
}

.glossary-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 24px;
}

.glossary-card {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    padding: 28px;
    transition: var(--transition-normal);
}

.glossary-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-medium);
    transform: translateY(-4px);
}

.glossary-term {
    margin-bottom: 16px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-light);
}

.glossary-term h3 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.glossary-eng {
    font-size: 0.85rem;
    color: var(--primary-light);
    font-style: italic;
}

.glossary-definition p {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 12px;
}

.glossary-usage {
    background: rgba(102, 126, 234, 0.1);
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.glossary-usage strong {
    color: var(--primary-light);
}

.glossary-footer {
    margin-top: var(--spacing-xl);
}

.glossary-info-card {
    display: flex;
    align-items: center;
    gap: 24px;
    background: var(--gradient-cosmic);
    border-radius: var(--radius-lg);
    padding: 32px;
}

.glossary-info-card .info-icon {
    flex-shrink: 0;
    width: 60px;
    height: 60px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.glossary-info-card .info-icon svg {
    width: 28px;
    height: 28px;
    stroke: white;
}

.glossary-info-card .info-content h4 {
    font-size: 1.2rem;
    font-weight: 700;
    color: white;
    margin-bottom: 8px;
}

.glossary-info-card .info-content p {
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 16px;
}

.glossary-info-card .btn-sm {
    padding: 10px 24px;
    font-size: 0.9rem;
    background: white;
    color: var(--primary);
}

.glossary-info-card .btn-sm:hover {
    background: rgba(255, 255, 255, 0.9);
}

@media (max-width: 768px) {
    .glossary-grid {
        grid-template-columns: 1fr;
    }

    .glossary-info-card {
        flex-direction: column;
        text-align: center;
    }

    .glossary-categories {
        gap: 8px;
    }

    .glossary-cat-btn {
        padding: 8px 16px;
        font-size: 0.85rem;
    }
}