/* 애니온 인텔리전스 - Dark Minimal AI Theme CSS */

/* CSS 리셋 및 기본 설정 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* 다크 미니멀 컬러 팔레트 */
    --bg: #08080a;
    --bg-soft: #0e0e12;
    --surface: #131318;
    --surface-hover: #1a1a21;
    --border: rgba(255, 255, 255, 0.08);
    --border-hover: rgba(255, 255, 255, 0.18);

    --text-primary: #f5f5f7;
    --text-secondary: #a1a1aa;
    --text-tertiary: #6b7280;

    --accent: #5b8cff;
    --accent-hover: #82a6ff;
    --accent-soft: rgba(91, 140, 255, 0.12);
    --accent-border: rgba(91, 140, 255, 0.35);

    /* 그라데이션 (포인트 용도로만 절제해서 사용) */
    --accent-gradient: linear-gradient(135deg, #5b8cff 0%, #38bdf8 100%);

    /* 폰트 */
    --font-primary: 'Inter', 'Noto Sans KR', sans-serif;
    --font-weight-light: 300;
    --font-weight-regular: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --font-weight-black: 800;
}

body {
    font-family: var(--font-primary);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ==== 공통 레이아웃 ==== */
.section-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--accent);
    font-size: 0.8rem;
    font-weight: var(--font-weight-semibold);
    letter-spacing: 0.2em;
    text-transform: uppercase;
    margin-bottom: 1.25rem;
}

.section-eyebrow::before {
    content: '';
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent-gradient);
}

.section-title {
    font-size: 2.5rem;
    font-weight: var(--font-weight-bold);
    color: var(--text-primary);
    line-height: 1.25;
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
}

.section-subtitle {
    font-size: 1.05rem;
    color: var(--text-secondary);
    line-height: 1.7;
    max-width: 760px;
    margin: 0 auto;
}

.gradient-text,
.gradient-text-hero,
.gradient-text-light {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ==== 로고 ==== */
.logo-container {
    display: flex;
    align-items: center;
    cursor: pointer;
    transition: opacity 0.3s ease;
}

.logo-container:hover {
    opacity: 0.8;
}

.logo-img {
    height: 36px;
    width: auto;
    filter: brightness(0) invert(1);
}

.hero-logo {
    height: 64px;
    width: auto;
    filter: brightness(0) invert(1);
    opacity: 0.9;
}

.contact-logo {
    height: 56px;
    width: auto;
    filter: brightness(0) invert(1);
    opacity: 0.85;
}

.footer-logo {
    height: 38px;
    width: auto;
    filter: brightness(0) invert(1);
    opacity: 0.8;
}

/* ==== 헤더 네비게이션 ==== */
header {
    background: rgba(8, 8, 10, 0.72) !important;
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
    transition: transform 0.3s ease, background 0.3s ease;
}

nav {
    max-width: 1200px;
}

/* 데스크톱 메뉴 스타일 */
.nav-link {
    position: relative;
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: var(--font-weight-medium);
    font-size: 0.92rem;
    padding: 8px 14px;
    border-radius: 8px;
    transition: all 0.25s ease;
}

.nav-link:hover {
    color: var(--text-primary);
    background-color: var(--surface-hover);
}

.nav-link::after {
    display: none;
}

/* 버튼 스타일 */
.btn-primary {
    background: var(--text-primary);
    color: var(--bg);
    padding: 10px 20px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: var(--font-weight-semibold);
    font-size: 0.9rem;
    display: inline-flex;
    align-items: center;
    transition: all 0.25s ease;
    border: none;
    cursor: pointer;
}

.btn-primary:hover {
    background: var(--accent-hover);
    color: var(--bg);
    text-decoration: none;
    transform: translateY(-1px);
}

/* 모바일 메뉴 버튼 */
.mobile-menu-btn {
    color: var(--text-secondary);
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    border-radius: 8px;
    transition: all 0.25s ease;
}

.mobile-menu-btn:hover {
    color: var(--text-primary);
    background-color: var(--surface-hover);
}

/* 모바일 메뉴 */
.mobile-menu {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(8, 8, 10, 0.96);
    backdrop-filter: blur(16px);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.25s ease;
    z-index: 1000;
}

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

.mobile-menu-content {
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.mobile-nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: var(--font-weight-medium);
    padding: 12px 16px;
    border-radius: 8px;
    transition: all 0.25s ease;
    border-left: 3px solid transparent;
}

.mobile-nav-link:hover {
    color: var(--text-primary);
    background-color: var(--surface-hover);
    border-left-color: var(--accent);
}

/* ==== 히어로 섹션 ==== */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    background: var(--bg);
}

.hero-bg-image {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url('../img/hero-bg.jpg');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    filter: grayscale(0.25) brightness(0.55);
    transform: scale(1.02);
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        linear-gradient(180deg, rgba(8, 8, 10, 0.55) 0%, rgba(8, 8, 10, 0.78) 55%, var(--bg) 100%),
        radial-gradient(ellipse 60% 50% at 50% 10%, rgba(91, 140, 255, 0.35) 0%, transparent 60%);
}

.hero-grid-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
    background-size: 64px 64px;
    -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 20%, black 0%, transparent 75%);
    mask-image: radial-gradient(ellipse 70% 60% at 50% 20%, black 0%, transparent 75%);
}

/* 파티클 (사용 안 함) */
.particles,
.particle {
    display: none;
}

/* 히어로 텍스트 */
.hero-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.45rem 1rem;
    border: 1px solid var(--border-hover);
    border-radius: 999px;
    font-size: 0.8rem;
    font-weight: var(--font-weight-medium);
    color: var(--text-secondary);
    margin-bottom: 2rem;
    background: var(--surface);
}

.hero-eyebrow i {
    color: var(--accent);
}

.hero-title {
    font-size: 5.25rem;
    font-weight: var(--font-weight-black);
    color: var(--text-primary);
    line-height: 1.08;
    margin-bottom: 1.5rem;
    letter-spacing: -0.03em;
    text-shadow: 0 4px 40px rgba(0, 0, 0, 0.45);
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 2.5rem;
    font-weight: var(--font-weight-regular);
    max-width: 640px;
    margin-left: auto;
    margin-right: auto;
    text-shadow: 0 2px 20px rgba(0, 0, 0, 0.4);
}

/* 히어로 버튼 */
.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn-hero-primary {
    background: var(--text-primary);
    color: var(--bg);
    padding: 14px 28px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: var(--font-weight-semibold);
    font-size: 1rem;
    display: inline-flex;
    align-items: center;
    transition: all 0.25s ease;
}

.btn-hero-primary:hover {
    background: var(--accent-hover);
    color: var(--bg);
    text-decoration: none;
    transform: translateY(-2px);
}

.btn-hero-secondary {
    background: transparent;
    color: var(--text-primary);
    padding: 14px 28px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: var(--font-weight-semibold);
    font-size: 1rem;
    display: inline-flex;
    align-items: center;
    transition: all 0.25s ease;
    border: 1px solid var(--border-hover);
}

.btn-hero-secondary:hover {
    background: var(--surface-hover);
    transform: translateY(-2px);
    color: var(--text-primary);
    text-decoration: none;
    border-color: var(--text-secondary);
}

/* 통계 그리드 */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
    max-width: 760px;
    margin: 4rem auto 0;
}

.stat-item {
    text-align: center;
    padding: 2rem 1.25rem;
    background: rgba(19, 19, 24, 0.55);
    border: 1px solid var(--border);
    border-radius: 16px;
    backdrop-filter: blur(8px);
    transition: border-color 0.3s ease, transform 0.3s ease, background 0.3s ease;

    /* 페이지 로드시 카드가 튀어오르듯 등장 (CSS 애니메이션, JS 불필요) */
    animation: statPopIn 0.6s cubic-bezier(0.34, 1.56, 0.64, 1) backwards;
}

.stat-item:nth-child(1) { animation-delay: 0.6s; }
.stat-item:nth-child(2) { animation-delay: 0.72s; }
.stat-item:nth-child(3) { animation-delay: 0.84s; }

@keyframes statPopIn {
    from {
        opacity: 0;
        transform: translateY(20px) scale(0.9);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.stat-item:hover {
    border-color: var(--accent-border);
    background: rgba(26, 26, 33, 0.7);
    transform: translateY(-4px) scale(1);
}

.stat-icon {
    width: 44px;
    height: 44px;
    margin: 0 auto 0.9rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    background: var(--accent-soft);
    border: 1px solid var(--accent-border);
    color: var(--accent);
    font-size: 1.1rem;
}

.stat-number {
    font-size: 2.75rem;
    font-weight: var(--font-weight-black);
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    letter-spacing: -0.02em;
    line-height: 1;
}

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

.stat-label {
    font-size: 0.9rem;
    color: var(--text-tertiary);
    font-weight: var(--font-weight-medium);
}

/* 스크롤 인디케이터 */
.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    color: var(--text-tertiary);
    font-size: 1.25rem;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
    40% { transform: translateX(-50%) translateY(-10px); }
    60% { transform: translateX(-50%) translateY(-5px); }
}

/* ==== 공통 섹션 배경 ==== */
.section-alt {
    background: var(--bg-soft);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

/* ==== 애니메이션 ==== */
.fade-in-up {
    opacity: 0;
    transform: translateY(24px);
    transition: all 0.7s ease-out;
}

.fade-in-up.animate {
    opacity: 1;
    transform: translateY(0);
}

/* ==== 회사 정보 카드 ==== */
.company-info-card {
    background: var(--surface);
    border-radius: 16px;
    padding: 2.25rem;
    border: 1px solid var(--border);
    transition: border-color 0.3s ease;
}

.company-info-card:hover {
    border-color: var(--border-hover);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.75rem;
}

.card-title {
    font-size: 1.25rem;
    font-weight: var(--font-weight-bold);
    color: var(--text-primary);
}

.tech-icon {
    width: 44px;
    height: 44px;
    background: var(--accent-soft);
    border: 1px solid var(--accent-border);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
    font-size: 1.25rem;
}

.info-grid {
    display: grid;
    gap: 0.25rem;
}

.info-item {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 1rem;
    padding: 0.85rem 0;
    border-bottom: 1px solid var(--border);
}

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

.info-label {
    font-weight: var(--font-weight-medium);
    color: var(--text-tertiary);
    font-size: 0.9rem;
}

.info-value {
    color: var(--text-primary);
    font-weight: var(--font-weight-medium);
    font-size: 0.95rem;
}

/* ==== About 이미지 ==== */
.about-image-wrap {
    position: relative;
    border-radius: 20px;
    overflow: hidden;
    border: 1px solid var(--border);
    box-shadow: 0 24px 60px -20px rgba(0, 0, 0, 0.6);
}

.about-image {
    display: block;
    width: 100%;
    height: 480px;
    object-fit: cover;
    filter: grayscale(0.15) contrast(1.05);
    transition: transform 0.6s ease, filter 0.6s ease;
}

.about-image-wrap:hover .about-image {
    transform: scale(1.05);
    filter: grayscale(0) contrast(1.05);
}

.about-image-wrap::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 40%, rgba(8, 8, 10, 0.85) 100%);
    pointer-events: none;
}

.about-image-badge {
    position: absolute;
    left: 1.75rem;
    bottom: 1.75rem;
    z-index: 2;
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.5rem;
    background: rgba(19, 19, 24, 0.65);
    border: 1px solid var(--border-hover);
    border-radius: 14px;
    backdrop-filter: blur(10px);
}

.badge-number {
    font-size: 2.5rem;
    font-weight: var(--font-weight-black);
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
}

.badge-text {
    font-size: 0.8rem;
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
    line-height: 1.3;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ==== 미니 기능 카드 (About) ==== */
.feature-card-mini {
    background: var(--surface);
    border-radius: 14px;
    padding: 1.5rem;
    border: 1px solid var(--border);
    transition: all 0.3s ease;
}

.feature-card-mini:hover {
    transform: translateY(-4px);
    border-color: var(--accent-border);
    background: var(--surface-hover);
}

.feature-card-mini .feature-icon {
    margin-bottom: 1rem;
}

.feature-card-mini .feature-title {
    font-size: 0.98rem;
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
    margin-bottom: 0.4rem;
}

.feature-card-mini .feature-desc {
    color: var(--text-secondary);
    line-height: 1.55;
    font-size: 0.85rem;
}

/* ==== 기능 카드 ==== */
.feature-card {
    background: var(--surface);
    border-radius: 14px;
    padding: 1.5rem;
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    border: 1px solid var(--border);
    transition: border-color 0.3s ease, transform 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-3px);
    border-color: var(--border-hover);
}

.feature-icon {
    width: 44px;
    height: 44px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
    font-size: 1.1rem;
    flex-shrink: 0;
    background: var(--accent-soft);
    border: 1px solid var(--accent-border);
}

.feature-content {
    flex: 1;
}

.feature-title {
    font-size: 1.05rem;
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
    margin-bottom: 0.4rem;
}

.feature-desc {
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: 0.92rem;
}

/* ==== 서비스 그리드 ==== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(330px, 1fr));
    gap: 1.5rem;
    margin-top: 3rem;
}

.service-card {
    background: var(--surface);
    border-radius: 16px;
    border: 1px solid var(--border);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.service-card::before {
    display: none;
}

.service-card:hover {
    transform: translateY(-6px);
    border-color: var(--accent-border);
    background: var(--surface-hover);
    box-shadow: 0 24px 48px -24px rgba(0, 0, 0, 0.7);
}

/* 서비스 카드 이미지 영역 */
.service-card-media {
    position: relative;
    height: 200px;
    overflow: hidden;
}

.service-card-media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: grayscale(0.35) brightness(0.85);
    transition: transform 0.6s ease, filter 0.6s ease;
}

.service-card:hover .service-card-media img {
    transform: scale(1.1);
    filter: grayscale(0) brightness(0.95);
}

.service-card-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(8, 8, 10, 0) 35%, var(--surface) 100%);
}

.service-card-body {
    padding: 1.75rem 2rem 2rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.service-icon {
    position: absolute;
    left: 1.5rem;
    bottom: -24px;
    width: 56px;
    height: 56px;
    background: var(--surface);
    border: 1px solid var(--accent-border);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
    font-size: 1.5rem;
    transition: all 0.3s ease;
    z-index: 2;
}

.service-card:hover .service-icon {
    background: var(--accent-gradient);
    color: var(--bg);
    border-color: transparent;
}

.service-title {
    font-size: 1.3rem;
    font-weight: var(--font-weight-bold);
    color: var(--text-primary);
    margin-top: 1.25rem;
    margin-bottom: 0.75rem;
}

.service-desc {
    color: var(--text-secondary);
    line-height: 1.65;
    margin-bottom: 1.5rem;
    font-size: 0.95rem;
}

.service-features {
    list-style: none;
    margin-bottom: 1.5rem;
}

.service-features li {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    margin-bottom: 0.6rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.service-features i {
    color: var(--accent);
    font-size: 0.8rem;
}

.service-tech {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.tech-tag {
    background: transparent;
    color: var(--text-tertiary);
    padding: 0.3rem 0.8rem;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: var(--font-weight-medium);
    border: 1px solid var(--border);
}

.service-tech {
    margin-top: auto;
}

/* ==== 서비스 CTA 카드 ==== */
.service-cta-card {
    background: var(--accent-gradient);
    border: none;
    align-items: flex-start;
    justify-content: center;
}

.service-cta-content {
    padding: 2.5rem 2rem;
    display: flex;
    flex-direction: column;
}

.service-cta-card .service-icon {
    position: static;
    background: rgba(255, 255, 255, 0.18);
    border: 1px solid rgba(255, 255, 255, 0.35);
    color: var(--bg);
    margin-bottom: 1.5rem;
}

.service-cta-card .service-title {
    color: var(--bg);
    margin-top: 0;
}

.service-cta-card .service-desc {
    color: rgba(8, 8, 10, 0.75);
    font-weight: var(--font-weight-medium);
}

.btn-cta-mini {
    display: inline-flex;
    align-items: center;
    align-self: flex-start;
    background: var(--bg);
    color: var(--text-primary);
    padding: 12px 24px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: var(--font-weight-semibold);
    font-size: 0.92rem;
    transition: all 0.25s ease;
}

.btn-cta-mini:hover {
    transform: translateY(-2px);
    color: var(--text-primary);
    text-decoration: none;
}

/* ==== 포트폴리오 섹션 (배경 이미지) ==== */
.portfolio-section {
    background: var(--bg-soft);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.portfolio-bg-image {
    position: absolute;
    inset: 0;
    background-image: url('../img/portfolio-bg.jpg');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    opacity: 0.35;
}

.portfolio-overlay {
    position: absolute;
    inset: 0;
    background:
        linear-gradient(180deg, var(--bg-soft) 0%, rgba(14, 14, 18, 0.65) 30%, var(--bg-soft) 100%);
}

.section-subtitle-light {
    color: rgba(245, 245, 247, 0.75);
}

/* ==== 타임라인 ==== */
.timeline-container {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
}

.timeline-container::before {
    content: '';
    position: absolute;
    left: 5.5rem;
    top: 0.5rem;
    bottom: 0.5rem;
    width: 1px;
    background: var(--border);
}

.timeline-item {
    display: flex;
    margin-bottom: 2.5rem;
    position: relative;
}

.timeline-item:last-child {
    margin-bottom: 0;
}

.timeline-year {
    flex-shrink: 0;
    width: 5.5rem;
    font-size: 1.05rem;
    font-weight: var(--font-weight-bold);
    color: var(--accent);
    text-align: left;
    position: relative;
    padding-top: 0.25rem;
}

.timeline-year::after {
    content: '';
    position: absolute;
    right: -0.3125rem;
    top: 0.5rem;
    width: 0.625rem;
    height: 0.625rem;
    background: var(--bg);
    border-radius: 50%;
    border: 2px solid var(--accent);
}

.timeline-content {
    flex: 1;
    margin-left: 2rem;
    background: rgba(19, 19, 24, 0.65);
    backdrop-filter: blur(10px);
    padding: 1.5rem 1.75rem;
    border-radius: 14px;
    border: 1px solid var(--border);
    transition: all 0.3s ease;
}

.timeline-content:hover {
    border-color: var(--accent-border);
    background: rgba(26, 26, 33, 0.75);
    transform: translateX(6px);
}

.timeline-title {
    font-size: 1.15rem;
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
    margin-bottom: 0.75rem;
}

.timeline-desc {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 1rem;
    font-size: 0.92rem;
}

.timeline-list {
    list-style: none;
    margin-bottom: 1rem;
}

.timeline-list li {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    padding-left: 1rem;
    position: relative;
    font-size: 0.92rem;
}

.timeline-list li::before {
    content: '—';
    position: absolute;
    left: 0;
    color: var(--text-tertiary);
}

.timeline-tech {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.tech-badge {
    background: var(--accent-soft);
    color: var(--accent);
    padding: 0.25rem 0.75rem;
    border-radius: 999px;
    font-size: 0.7rem;
    font-weight: var(--font-weight-semibold);
    border: 1px solid var(--accent-border);
}

/* ==== 고객사 그리드 ==== */
.clients-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.25rem;
    margin-top: 3rem;
}

.client-card {
    background: var(--surface);
    border-radius: 14px;
    padding: 2rem;
    text-align: left;
    border: 1px solid var(--border);
    transition: all 0.3s ease;
}

.client-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent-border);
    background: var(--surface-hover);
}

.client-icon {
    font-size: 2.25rem;
    margin-bottom: 1rem;
    display: block;
    filter: grayscale(1) opacity(0.85);
}

.client-name {
    font-size: 1.1rem;
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
    margin-bottom: 0.4rem;
}

.client-project {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1.25rem;
    line-height: 1.4;
}

.client-tag {
    background: transparent;
    color: var(--text-tertiary);
    padding: 0.25rem 0.75rem;
    border-radius: 999px;
    font-size: 0.7rem;
    font-weight: var(--font-weight-medium);
    display: inline-block;
    border: 1px solid var(--border);
}

/* ==== 연락처 섹션 ==== */
.contact-section {
    background: var(--bg);
    position: relative;
    overflow: hidden;
    border-top: 1px solid var(--border);
}

.contact-bg-image {
    position: absolute;
    inset: 0;
    background-image: url('../img/contact-bg.jpg');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    filter: grayscale(0.3) brightness(0.6);
}

.contact-overlay {
    position: absolute;
    inset: 0;
    background:
        linear-gradient(180deg, var(--bg) 0%, rgba(8, 8, 10, 0.65) 25%, rgba(8, 8, 10, 0.65) 75%, var(--bg) 100%),
        radial-gradient(ellipse 50% 50% at 50% 0%, rgba(91, 140, 255, 0.18) 0%, transparent 60%);
}

.contact-card {
    background: rgba(19, 19, 24, 0.7);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 2.25rem;
    transition: all 0.3s ease;
}

.contact-card:hover {
    border-color: var(--accent-border);
    transform: translateY(-4px);
}

.contact-card-title {
    font-size: 1.15rem;
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
}

.contact-card-title i {
    color: var(--accent);
}

.contact-details {
    display: grid;
    gap: 1.1rem;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.contact-item i {
    color: var(--accent);
    font-size: 1rem;
    width: 20px;
    flex-shrink: 0;
    margin-top: 0.2rem;
}

.contact-item div {
    flex: 1;
}

.contact-label {
    display: block;
    color: var(--text-tertiary);
    font-size: 0.85rem;
    margin-bottom: 0.25rem;
}

.contact-value {
    color: var(--text-primary);
    font-weight: var(--font-weight-medium);
    font-size: 0.95rem;
}

.business-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 0.9rem;
}

.business-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--text-secondary);
    font-weight: var(--font-weight-medium);
    font-size: 0.9rem;
    padding: 0.6rem 0;
}

.business-item i {
    color: var(--accent);
    font-size: 1rem;
    width: 20px;
}

/* CTA 버튼 */
.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 1.5rem;
}

.btn-cta-primary {
    background: var(--accent-gradient);
    color: var(--bg);
    padding: 14px 28px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: var(--font-weight-semibold);
    font-size: 1rem;
    display: inline-flex;
    align-items: center;
    transition: all 0.25s ease;
}

.btn-cta-primary:hover {
    transform: translateY(-2px);
    color: var(--bg);
    text-decoration: none;
    filter: brightness(1.1);
}

.btn-cta-secondary {
    background: transparent;
    color: var(--text-primary);
    padding: 14px 28px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: var(--font-weight-semibold);
    font-size: 1rem;
    display: inline-flex;
    align-items: center;
    transition: all 0.25s ease;
    border: 1px solid var(--border-hover);
}

.btn-cta-secondary:hover {
    background: var(--surface-hover);
    transform: translateY(-2px);
    color: var(--text-primary);
    text-decoration: none;
}

.cta-text {
    color: var(--text-tertiary);
    font-size: 0.95rem;
}

/* ==== 푸터 ==== */
.footer-section {
    background: var(--bg);
    color: var(--text-primary);
    border-top: 1px solid var(--border);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 3rem;
    align-items: start;
    margin-bottom: 2.5rem;
}

.footer-logo-section {
    text-align: left;
}

.footer-tagline {
    color: var(--text-tertiary);
    margin-top: 1rem;
    font-size: 0.95rem;
}

.footer-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
}

.footer-title {
    font-size: 0.95rem;
    font-weight: var(--font-weight-semibold);
    margin-bottom: 1rem;
    color: var(--text-primary);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.footer-text {
    color: var(--text-tertiary);
    line-height: 1.7;
    margin-bottom: 0.4rem;
    font-size: 0.9rem;
}

.footer-bottom {
    text-align: left;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.5rem;
}

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

.footer-sub {
    font-size: 0.85rem;
}

/* ==== 스크롤 투 탑 ==== */
.scroll-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background: var(--surface);
    color: var(--text-primary);
    border: 1px solid var(--border-hover);
    border-radius: 50%;
    width: 48px;
    height: 48px;
    font-size: 1.1rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 1000;
}

.scroll-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.scroll-to-top:hover {
    transform: translateY(-3px);
    border-color: var(--accent);
    color: var(--accent);
}

/* 모바일/태블릿: 고정 배경(parallax)은 성능 이슈로 일반 스크롤로 전환 */
@media (max-width: 1024px) {
    .hero-bg-image,
    .portfolio-bg-image,
    .contact-bg-image {
        background-attachment: scroll;
    }

    .about-image {
        height: 360px;
    }
}

/* ==== 반응형 디자인 ==== */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 3.25rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .services-grid {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    }
}

@media (max-width: 768px) {
    .logo-img {
        height: 30px;
    }

    .hero-logo {
        height: 52px;
    }

    .contact-logo {
        height: 44px;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.05rem;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .stats-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 0.75rem;
        margin-top: 3rem;
    }

    .stat-item {
        padding: 1.25rem 0.75rem;
    }

    .stat-icon {
        width: 36px;
        height: 36px;
        font-size: 0.95rem;
        margin-bottom: 0.6rem;
    }

    .stat-number {
        font-size: 1.85rem;
    }

    .stat-label {
        font-size: 0.75rem;
    }

    .section-title {
        font-size: 1.75rem;
    }

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

    .clients-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }

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

    .footer-bottom {
        flex-direction: column;
    }

    .timeline-container::before {
        left: 1rem;
    }

    .timeline-year {
        width: 2rem;
        font-size: 0.85rem;
    }

    .timeline-year::after {
        right: -0.34375rem;
        width: 0.625rem;
        height: 0.625rem;
    }

    .timeline-content {
        margin-left: 1rem;
    }
}

@media (max-width: 640px) {
    .logo-img {
        height: 28px;
    }

    .hero-logo {
        height: 44px;
    }

    .hero-title {
        font-size: 2.1rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }

    .btn-hero-primary,
    .btn-hero-secondary,
    .btn-cta-primary,
    .btn-cta-secondary {
        width: 100%;
        max-width: 280px;
        justify-content: center;
    }
}

/* ==== 부드러운 스크롤 ==== */
html {
    scroll-behavior: smooth;
}

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

/* ==== 접근성 ==== */
.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;
}

a:focus,
button:focus {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

/* ==== 프린트 스타일 ==== */
@media print {
    .hero-section,
    .contact-section {
        background: var(--white) !important;
        color: var(--dark-slate) !important;
    }

    .scroll-to-top {
        display: none !important;
    }
}