:root {
            --brass: #B8860B;
            --brass-light: #D4A017;
            --copper: #B87333;
            --copper-light: #CD8544;
            --dark-iron: #2C2C2C;
            --iron-medium: #3D3D3D;
            --steam: #E8E4D9;
            --steam-light: #F5F3ED;
            --leather: #6B4226;
            --leather-dark: #4A2E1A;
            --rivet-silver: #A0A0A0;
            --rivet-light: #C0C0C0;
            --parchment: #F0E8D8;
            --font-display: 'Cinzel', serif;
            --font-body: 'Noto Sans KR', sans-serif;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

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

        body {
            font-family: var(--font-body);
            background-color: var(--steam);
            color: var(--dark-iron);
            line-height: 1.7;
            overflow-x: hidden;
        }

        /* Leather texture background */
        .leather-texture {
            background:
                repeating-linear-gradient(
                    45deg,
                    transparent,
                    transparent 2px,
                    rgba(107, 66, 38, 0.03) 2px,
                    rgba(107, 66, 38, 0.03) 4px
                ),
                repeating-linear-gradient(
                    -45deg,
                    transparent,
                    transparent 2px,
                    rgba(107, 66, 38, 0.02) 2px,
                    rgba(107, 66, 38, 0.02) 4px
                );
        }

        /* Gear Animations */
        @keyframes rotateGearCW {
            from { transform: rotate(0deg); }
            to { transform: rotate(360deg); }
        }

        @keyframes rotateGearCCW {
            from { transform: rotate(360deg); }
            to { transform: rotate(0deg); }
        }

        @keyframes steamRise {
            0% {
                transform: translateY(0) scale(1);
                opacity: 0.4;
            }
            50% {
                opacity: 0.6;
            }
            100% {
                transform: translateY(-120px) scale(2.5);
                opacity: 0;
            }
        }

        @keyframes pistonPump {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(-8px); }
        }

        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(40px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        @keyframes gaugeNeedle {
            0% { transform: rotate(-90deg); }
            100% { transform: rotate(var(--needle-angle)); }
        }

        @keyframes counterTick {
            0% { transform: translateY(0); }
            100% { transform: translateY(-100%); }
        }

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

        .animate-on-scroll {
            opacity: 0;
            transform: translateY(40px);
            transition: opacity 0.8s ease, transform 0.8s ease;
        }

        .animate-on-scroll.is-visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* Gear CSS Component */
        .gear {
            border-radius: 50%;
            border: 6px dashed var(--brass);
            position: absolute;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .gear::before {
            content: '';
            position: absolute;
            width: 30%;
            height: 30%;
            border-radius: 50%;
            background: var(--brass);
        }

        .gear::after {
            content: '';
            position: absolute;
            width: 15%;
            height: 15%;
            border-radius: 50%;
            background: var(--dark-iron);
        }

        .gear-cw {
            animation: rotateGearCW 12s linear infinite;
        }

        .gear-ccw {
            animation: rotateGearCCW 10s linear infinite;
        }

        /* Steam Cloud */
        .steam-cloud {
            position: absolute;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.5);
            filter: blur(8px);
            animation: steamRise 4s ease-out infinite;
        }

        /* Rivet Dots */
        .rivet {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: radial-gradient(circle at 30% 30%, var(--rivet-light), var(--rivet-silver), #666);
            position: absolute;
            box-shadow: inset 0 1px 2px rgba(255,255,255,0.5), 0 1px 2px rgba(0,0,0,0.3);
        }

        /* Header */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: var(--dark-iron);
            border-bottom: 3px solid var(--brass);
            box-shadow: 0 4px 12px rgba(0,0,0,0.4);
        }

        .header-inner {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 2rem;
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }

        .logo {
            font-family: var(--font-display);
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--brass);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }

        .logo i {
            font-size: 1.3rem;
            color: var(--copper);
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 2rem;
            list-style: none;
        }

        .nav-menu a {
            font-family: var(--font-body);
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--steam);
            text-decoration: none;
            transition: color 0.3s ease;
            position: relative;
            padding-bottom: 4px;
        }

        .nav-menu a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--brass);
            transition: width 0.3s ease;
        }

        .nav-menu a:hover {
            color: var(--brass);
        }

        .nav-menu a:hover::after {
            width: 100%;
        }

        .mobile-toggle {
            display: none;
            background: none;
            border: 2px solid var(--brass);
            color: var(--brass);
            font-size: 1.2rem;
            padding: 0.5rem;
            cursor: pointer;
            border-radius: 4px;
        }

        /* Mobile Menu */
        .mobile-nav {
            display: none;
            position: fixed;
            top: 72px;
            left: 0;
            right: 0;
            background: var(--dark-iron);
            border-bottom: 3px solid var(--brass);
            padding: 1.5rem 2rem;
            z-index: 999;
        }

        .mobile-nav.is-open {
            display: block;
        }

        .mobile-nav a {
            display: block;
            padding: 0.75rem 0;
            color: var(--steam);
            text-decoration: none;
            font-size: 1rem;
            border-bottom: 1px solid var(--iron-medium);
        }

        .mobile-nav a:hover {
            color: var(--brass);
        }

        /* Hero Section */
        .hero-section {
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(180deg, var(--dark-iron) 0%, #3A2A1A 50%, var(--leather-dark) 100%);
            overflow: hidden;
            padding-top: 72px;
        }

        .hero-gears {
            position: absolute;
            width: 100%;
            height: 100%;
            top: 0;
            left: 0;
            pointer-events: none;
        }

        .hero-gear-1 {
            width: 200px;
            height: 200px;
            top: 10%;
            left: -50px;
            border-color: rgba(184, 134, 11, 0.3);
        }

        .hero-gear-2 {
            width: 150px;
            height: 150px;
            top: 8%;
            left: 95px;
            border-color: rgba(184, 115, 51, 0.3);
        }

        .hero-gear-3 {
            width: 280px;
            height: 280px;
            bottom: 5%;
            right: -80px;
            border-color: rgba(184, 134, 11, 0.25);
        }

        .hero-gear-4 {
            width: 120px;
            height: 120px;
            bottom: 15%;
            right: 140px;
            border-color: rgba(184, 115, 51, 0.3);
        }

        .hero-gear-5 {
            width: 180px;
            height: 180px;
            top: 40%;
            right: 5%;
            border-color: rgba(184, 134, 11, 0.2);
        }

        .hero-gear-6 {
            width: 100px;
            height: 100px;
            bottom: 30%;
            left: 10%;
            border-color: rgba(184, 115, 51, 0.25);
        }

        .hero-steam-container {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 200px;
            pointer-events: none;
        }

        .hero-content {
            position: relative;
            z-index: 10;
            text-align: center;
            padding: 2rem;
            max-width: 800px;
        }

        .hero-ornament {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 1rem;
            margin-bottom: 2rem;
        }

        .ornament-line {
            width: 80px;
            height: 2px;
            background: var(--brass);
        }

        .ornament-gear {
            width: 40px;
            height: 40px;
            border: 3px dashed var(--brass);
            border-radius: 50%;
            animation: rotateGearCW 8s linear infinite;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .ornament-gear::before {
            content: '';
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: var(--brass);
        }

        .hero-subtitle {
            font-family: var(--font-body);
            font-size: 1rem;
            color: var(--copper-light);
            letter-spacing: 4px;
            text-transform: uppercase;
            margin-bottom: 1.5rem;
        }

        .hero-title {
            font-family: var(--font-display);
            font-size: clamp(2.5rem, 6vw, 4.5rem);
            font-weight: 900;
            color: var(--brass);
            line-height: 1.2;
            margin-bottom: 1.5rem;
            text-shadow: 0 2px 4px rgba(0,0,0,0.5);
        }

        .hero-description {
            font-size: 1.1rem;
            color: var(--steam);
            line-height: 1.8;
            margin-bottom: 2.5rem;
            opacity: 0.9;
        }

        .hero-btn {
            display: inline-flex;
            align-items: center;
            gap: 0.75rem;
            padding: 1rem 2.5rem;
            background: var(--brass);
            color: var(--dark-iron);
            font-family: var(--font-display);
            font-size: 1rem;
            font-weight: 700;
            text-decoration: none;
            border: 3px solid var(--brass-light);
            border-radius: 0;
            position: relative;
            transition: all 0.3s ease;
            box-shadow: 0 4px 12px rgba(184, 134, 11, 0.3);
        }

        .hero-btn:hover {
            background: var(--brass-light);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(184, 134, 11, 0.4);
        }

        .hero-btn .rivet {
            width: 8px;
            height: 8px;
        }

        .hero-btn .rivet-tl { top: 4px; left: 4px; }
        .hero-btn .rivet-tr { top: 4px; right: 4px; }
        .hero-btn .rivet-bl { bottom: 4px; left: 4px; }
        .hero-btn .rivet-br { bottom: 4px; right: 4px; }

        /* Section Styles */
        .section {
            padding: 6rem 2rem;
            position: relative;
        }

        .section-inner {
            max-width: 1200px;
            margin: 0 auto;
        }

        .section-header {
            text-align: center;
            margin-bottom: 4rem;
        }

        .section-header .ornament-gear {
            margin: 0 auto 1.5rem;
        }

        .section-title {
            font-family: var(--font-display);
            font-size: clamp(1.8rem, 4vw, 2.5rem);
            font-weight: 700;
            color: var(--dark-iron);
            margin-bottom: 1rem;
        }

        .section-title-brass {
            color: var(--brass);
        }

        .section-desc {
            font-size: 1.05rem;
            color: #555;
            max-width: 600px;
            margin: 0 auto;
        }

        .gear-divider {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 1rem;
            margin: 0 auto 2rem;
            width: fit-content;
        }

        .gear-divider-line {
            width: 60px;
            height: 1px;
            background: var(--brass);
        }

        .gear-divider-icon {
            width: 24px;
            height: 24px;
            border: 2px dashed var(--brass);
            border-radius: 50%;
            animation: rotateGearCW 6s linear infinite;
        }

        /* Features Section */
        .features-section {
            background: var(--steam-light);
        }

        .features-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 2rem;
        }

        .feature-card {
            background: var(--parchment);
            border-top: 4px solid var(--brass);
            padding: 2.5rem 1.5rem;
            position: relative;
            box-shadow: 0 4px 16px rgba(0,0,0,0.08);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }

        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: 0 8px 24px rgba(0,0,0,0.12);
        }

        .feature-card .rivet {
            width: 8px;
            height: 8px;
        }

        .feature-card .rivet-tl { top: 8px; left: 8px; }
        .feature-card .rivet-tr { top: 8px; right: 8px; }
        .feature-card .rivet-bl { bottom: 8px; left: 8px; }
        .feature-card .rivet-br { bottom: 8px; right: 8px; }

        .feature-icon {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            border: 3px solid var(--brass);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 1.5rem;
            color: var(--brass);
            font-size: 1.4rem;
            background: rgba(184, 134, 11, 0.05);
        }

        .feature-title {
            font-family: var(--font-display);
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--dark-iron);
            margin-bottom: 0.75rem;
        }

        .feature-desc {
            font-size: 0.9rem;
            color: #555;
            line-height: 1.7;
        }

        /* Board Widgets */
        .boards-section {
            background:
                repeating-linear-gradient(
                    45deg,
                    transparent,
                    transparent 2px,
                    rgba(107, 66, 38, 0.02) 2px,
                    rgba(107, 66, 38, 0.02) 4px
                ),
                var(--steam);
        }

        .boards-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 2rem;
        }

        .board-widget {
            background: #fff;
            border: 1px solid rgba(184, 134, 11, 0.2);
            overflow: hidden;
            box-shadow: 0 4px 12px rgba(0,0,0,0.06);
        }

        .board-header {
            background: var(--dark-iron);
            padding: 1rem 1.5rem;
            display: flex;
            align-items: center;
            justify-content: space-between;
            position: relative;
        }

        .board-header::before {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: var(--brass);
        }

        .board-header-left {
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }

        .board-header-icon {
            width: 28px;
            height: 28px;
            border: 2px dashed var(--brass);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            animation: rotateGearCW 10s linear infinite;
        }

        .board-header-icon::before {
            content: '';
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--brass);
        }

        .board-title {
            font-family: var(--font-display);
            font-size: 1rem;
            font-weight: 600;
            color: var(--brass);
        }

        .board-more {
            font-size: 0.8rem;
            color: var(--rivet-silver);
            text-decoration: none;
            transition: color 0.3s ease;
        }

        .board-more:hover {
            color: var(--brass);
        }

        .board-list {
            list-style: none;
            padding: 1rem 1.5rem;
        }

        .board-item {
            display: flex;
            align-items: center;
            padding: 0.7rem 0;
            border-bottom: 1px solid rgba(184, 134, 11, 0.1);
        }

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

        .board-item-icon {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            border: 1.5px solid var(--brass);
            margin-right: 0.75rem;
            flex-shrink: 0;
        }

        .board-item-title {
            flex: 1;
            font-size: 0.9rem;
            color: var(--dark-iron);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .board-item-number {
            font-family: var(--font-display);
            font-size: 0.75rem;
            color: var(--brass);
            background: rgba(184, 134, 11, 0.08);
            padding: 0.15rem 0.5rem;
            border: 1px solid rgba(184, 134, 11, 0.2);
            margin-left: 0.75rem;
            min-width: 36px;
            text-align: center;
        }

        .board-item-date {
            font-size: 0.8rem;
            color: var(--rivet-silver);
            margin-left: 0.75rem;
            flex-shrink: 0;
        }

        /* Stats Section */
        .stats-section {
            background: var(--dark-iron);
            position: relative;
            overflow: hidden;
        }

        .stats-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: var(--brass);
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 2.5rem;
        }

        .stat-gauge {
            text-align: center;
            position: relative;
        }

        .gauge-outer {
            width: 140px;
            height: 140px;
            border-radius: 50%;
            border: 4px solid var(--iron-medium);
            margin: 0 auto 1.5rem;
            position: relative;
            display: flex;
            align-items: center;
            justify-content: center;
            background: radial-gradient(circle, #1a1a1a 0%, var(--dark-iron) 100%);
        }

        .gauge-progress {
            position: absolute;
            top: -4px;
            left: -4px;
            width: calc(100% + 8px);
            height: calc(100% + 8px);
            border-radius: 50%;
            border: 4px solid transparent;
            border-top-color: var(--brass);
            border-right-color: var(--brass);
            transform: rotate(-45deg);
        }

        .gauge-inner {
            display: flex;
            flex-direction: column;
            align-items: center;
        }

        .gauge-number {
            font-family: var(--font-display);
            font-size: 2rem;
            font-weight: 700;
            color: var(--brass);
            line-height: 1;
        }

        .gauge-unit {
            font-size: 0.75rem;
            color: var(--rivet-silver);
            margin-top: 0.25rem;
        }

        .stat-label {
            font-size: 0.9rem;
            color: var(--steam);
            font-weight: 500;
        }

        .stat-sub {
            font-size: 0.8rem;
            color: var(--rivet-silver);
            margin-top: 0.25rem;
        }

        /* CTA Section */
        .cta-section {
            background:
                repeating-linear-gradient(
                    45deg,
                    transparent,
                    transparent 3px,
                    rgba(107, 66, 38, 0.05) 3px,
                    rgba(107, 66, 38, 0.05) 6px
                ),
                var(--leather);
            position: relative;
            padding: 5rem 2rem;
        }

        .cta-section::before,
        .cta-section::after {
            content: '';
            position: absolute;
            left: 0;
            right: 0;
            height: 6px;
            background: repeating-linear-gradient(
                90deg,
                var(--brass) 0px,
                var(--brass) 20px,
                transparent 20px,
                transparent 24px
            );
        }

        .cta-section::before { top: 0; }
        .cta-section::after { bottom: 0; }

        .cta-inner {
            max-width: 700px;
            margin: 0 auto;
            text-align: center;
        }

        .cta-title {
            font-family: var(--font-display);
            font-size: clamp(1.8rem, 4vw, 2.5rem);
            font-weight: 700;
            color: var(--brass);
            margin-bottom: 1rem;
        }

        .cta-desc {
            font-size: 1.05rem;
            color: var(--steam);
            margin-bottom: 2.5rem;
            opacity: 0.9;
            line-height: 1.8;
        }

        .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 0.75rem;
            padding: 1.2rem 3rem;
            background: var(--brass);
            color: var(--dark-iron);
            font-family: var(--font-display);
            font-size: 1.1rem;
            font-weight: 700;
            text-decoration: none;
            border: none;
            cursor: pointer;
            position: relative;
            transition: all 0.3s ease;
            box-shadow: 0 4px 16px rgba(184, 134, 11, 0.4);
        }

        .cta-btn:hover {
            background: var(--brass-light);
            transform: translateY(-3px);
            box-shadow: 0 8px 24px rgba(184, 134, 11, 0.5);
        }

        .cta-btn .rivet {
            width: 8px;
            height: 8px;
        }

        .cta-btn .rivet-tl { top: 6px; left: 6px; }
        .cta-btn .rivet-tr { top: 6px; right: 6px; }
        .cta-btn .rivet-bl { bottom: 6px; left: 6px; }
        .cta-btn .rivet-br { bottom: 6px; right: 6px; }

        /* Footer */
        .site-footer {
            background: var(--dark-iron);
            color: var(--steam);
            position: relative;
        }

        .footer-gear-divider {
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 1.5rem 0;
            gap: 0.5rem;
            border-bottom: 1px solid var(--iron-medium);
        }

        .footer-gear-sm {
            width: 20px;
            height: 20px;
            border: 2px dashed var(--copper);
            border-radius: 50%;
            animation: rotateGearCW 8s linear infinite;
        }

        .footer-gear-md {
            width: 30px;
            height: 30px;
            border: 2px dashed var(--brass);
            border-radius: 50%;
            animation: rotateGearCCW 10s linear infinite;
        }

        .footer-gear-line {
            width: 80px;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--brass), transparent);
        }

        .footer-main {
            max-width: 1200px;
            margin: 0 auto;
            padding: 3rem 2rem;
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 3rem;
        }

        .footer-brand {
            font-family: var(--font-display);
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--brass);
            margin-bottom: 1rem;
        }

        .footer-brand-desc {
            font-size: 0.9rem;
            color: var(--rivet-silver);
            line-height: 1.7;
        }

        .footer-heading {
            font-family: var(--font-display);
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--brass);
            margin-bottom: 1.25rem;
            padding-bottom: 0.5rem;
            border-bottom: 1px solid var(--iron-medium);
        }

        .footer-links {
            list-style: none;
        }

        .footer-links li {
            margin-bottom: 0.6rem;
        }

        .footer-links a {
            font-size: 0.85rem;
            color: var(--rivet-silver);
            text-decoration: none;
            transition: color 0.3s ease;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .footer-links a:hover {
            color: var(--copper-light);
        }

        .footer-links a::before {
            content: '';
            width: 4px;
            height: 4px;
            border-radius: 50%;
            background: var(--copper);
            flex-shrink: 0;
        }

        .footer-bottom {
            border-top: 1px solid var(--iron-medium);
            padding: 1.5rem 2rem;
            text-align: center;
        }

        .footer-copyright {
            font-size: 0.8rem;
            color: var(--rivet-silver);
        }

        /* Responsive */
        @media (max-width: 1279px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 2rem;
            }

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

        @media (max-width: 1023px) {
            .boards-grid {
                grid-template-columns: 1fr;
            }

            .hero-gear-5 {
                display: none;
            }
        }

        @media (max-width: 767px) {
            html {
                font-size: 14px;
            }

            .nav-menu {
                display: none;
            }

            .mobile-toggle {
                display: block;
            }

            .hero-section {
                min-height: 80vh;
            }

            .hero-gear-1,
            .hero-gear-2,
            .hero-gear-5,
            .hero-gear-6 {
                display: none;
            }

            .hero-gear-3 {
                width: 150px;
                height: 150px;
            }

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

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 1.5rem;
            }

            .gauge-outer {
                width: 110px;
                height: 110px;
            }

            .gauge-number {
                font-size: 1.5rem;
            }

            .footer-main {
                grid-template-columns: 1fr;
                gap: 2rem;
            }

            .section {
                padding: 4rem 1.5rem;
            }

            .boards-grid {
                gap: 1.5rem;
            }
        }

        @media (max-width: 359px) {
            html {
                font-size: 13px;
            }

            .hero-content {
                padding: 1rem;
            }

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

            .header-inner {
                padding: 0 1rem;
            }
        }