/**
 * VOLT Fleet Stylesheet
 * =====================
 * 구조:
 * 1. CSS Variables (디자인 토큰)
 * 2. Reset & Base
 * 3. Layout Components (Navigation, Hero, Sections, Footer)
 * 4. Content Components (Cards, Timeline, Forms)
 * 5. Utilities
 * 6. Responsive
 *
 * 향후 확장 시:
 * - Tailwind CSS 도입 시: utility classes만 변환
 * - CSS Modules / styled-components 전환 시: 컴포넌트별 분리 쉬움
 */

/* ==========================================================================
   1. CSS Variables (디자인 토큰)
   ========================================================================== */

:root {
    /* VOLT Brand Colors */
    --volt-orange: #E8482F;
    --volt-orange-light: #FF5F44;
    --volt-orange-dark: #C13A24;
    --volt-orange-glow: rgba(232, 72, 47, 0.15);

    /* Base Colors */
    --color-bg-primary: #000000;
    --color-bg-secondary: #0a0a0a;
    --color-bg-card: rgba(255, 255, 255, 0.03);
    --color-bg-card-hover: rgba(255, 255, 255, 0.05);
    --color-text-primary: #f5f5f7;
    --color-text-secondary: #a1a1a6;
    --color-text-tertiary: #86868b;
    --color-border: rgba(255, 255, 255, 0.08);
    --color-border-accent: rgba(232, 72, 47, 0.3);
    --color-border-hover: rgba(255, 255, 255, 0.15);

    /* Spacing */
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 32px;
    --spacing-xl: 48px;
    --spacing-2xl: 60px;

    /* Border Radius */
    --radius-sm: 12px;
    --radius-md: 20px;
    --radius-full: 980px;

    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Pretendard", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --font-mono: "SF Mono", "Menlo", "Consolas", "Courier New", monospace;

    /* Z-index Layers */
    --z-nav: 1000;
    --z-mobile-menu: 999;
    --z-modal: 1100;
}

/* ==========================================================================
   2. Reset & Base
   ========================================================================== */

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

html {
    scroll-behavior: smooth;
}

html, body {
    width: 100%;
    overflow-x: hidden;
}

body {
    font-family: var(--font-family);
    background: var(--color-bg-primary);
    color: var(--color-text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    min-height: 100vh;
}

/* Document Tag (공문 느낌) */
.doc-tag {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 500;
    letter-spacing: 0.1em;
    color: var(--volt-orange);
    background: rgba(232, 72, 47, 0.08);
    border: 1px solid var(--color-border-accent);
    padding: 4px 12px;
    border-radius: 4px;
    text-transform: uppercase;
    margin-bottom: 16px;
}

/* ==========================================================================
   3. Layout - Navigation
   ========================================================================== */

.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    z-index: var(--z-nav);
    transition: background 0.3s ease;
    border-bottom: 1px solid transparent;
}

.nav.scrolled {
    background: rgba(0, 0, 0, 0.95);
    border-bottom-color: var(--color-border);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 22px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 56px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--color-text-primary);
    text-decoration: none;
    cursor: pointer;
}

.nav-logo img {
    width: 32px;
    height: 32px;
    object-fit: contain;
}

.nav-logo-text {
    font-size: 20px;
    font-weight: 700;
    color: var(--volt-orange);
    letter-spacing: -0.02em;
}

.nav-links {
    display: flex;
    gap: 32px;
    list-style: none;
    align-items: center;
}

.nav-links a {
    color: var(--color-text-primary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 400;
    transition: color 0.2s ease;
    letter-spacing: -0.01em;
    cursor: pointer;
    position: relative;
}

.nav-links a:hover {
    color: var(--volt-orange);
}

.nav-links a:focus-visible,
.mobile-menu a:focus-visible,
.footer-section a:focus-visible {
    outline: 2px solid var(--volt-orange);
    outline-offset: 4px;
    border-radius: 4px;
}

.nav-discord {
    background: var(--volt-orange);
    color: #fff !important;
    padding: 6px 16px;
    border-radius: var(--radius-full);
    font-weight: 500;
    transition: all 0.2s ease;
}

.nav-discord:hover {
    background: var(--volt-orange-light);
    color: #fff !important;
    transform: scale(1.03);
}

/* Hamburger Menu */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 8px;
    background: transparent;
    border: none;
}

.hamburger span {
    width: 22px;
    height: 2px;
    background: var(--color-text-primary);
    transition: all 0.3s ease;
}

.mobile-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.98);
    backdrop-filter: blur(40px);
    -webkit-backdrop-filter: blur(40px);
    z-index: var(--z-mobile-menu);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.mobile-menu-close {
    position: absolute;
    top: 16px;
    right: 22px;
    font-size: 36px;
    color: var(--color-text-primary);
    cursor: pointer;
    background: none;
    border: none;
    padding: 8px;
    line-height: 1;
}

.mobile-menu ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 28px;
    align-items: center;
}

.mobile-menu a {
    color: var(--color-text-primary);
    text-decoration: none;
    font-size: 26px;
    font-weight: 500;
    letter-spacing: -0.02em;
    transition: color 0.2s ease;
    cursor: pointer;
}

.mobile-menu a:hover {
    color: var(--volt-orange);
}

/* ==========================================================================
   3. Layout - Hero Section (수정된 레이아웃)
   ========================================================================== */

.hero {
    width: 100%;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    /* 핵심 수정: 위쪽 패딩을 nav 높이만큼만 주고, 콘텐츠는 자연스럽게 중앙 정렬 */
    padding: 100px 22px 80px;
    background:
        radial-gradient(ellipse at top, rgba(232, 72, 47, 0.12) 0%, transparent 60%),
        linear-gradient(180deg, #000000 0%, #0a0a0a 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        radial-gradient(circle at 20% 30%, rgba(232, 72, 47, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(255, 95, 68, 0.05) 0%, transparent 50%);
    pointer-events: none;
}

/* Grid background pattern */
.hero::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
    background-size: 60px 60px;
    pointer-events: none;
    mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}

.hero-content {
    max-width: 980px;
    text-align: center;
    position: relative;
    z-index: 1;
    /* 콘텐츠 내부 정렬 - flexbox로 일관된 간격 관리 */
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* 핵심 수정: 로고 크기와 마진 조정 */
.hero-logo {
    width: 200px;
    height: auto;
    /* 로고 자체 여백 보정 (이미지 위아래 여백을 음수 마진으로 상쇄) */
    margin-top: -20px;
    margin-bottom: -10px;
    animation: fadeInUp 1s ease;
    filter: drop-shadow(0 0 40px rgba(232, 72, 47, 0.3));
}

.hero-logo-fallback {
    width: 160px;
    height: 160px;
    margin: 0 auto 24px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--volt-orange) 0%, var(--volt-orange-dark) 100%);
    display: none;
    align-items: center;
    justify-content: center;
    font-size: 64px;
    font-weight: 800;
    color: #fff;
    letter-spacing: -3px;
    animation: fadeInUp 1s ease;
}

.hero-logo-fallback.active {
    display: flex;
}

.hero-tagline {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 12px;
    font-weight: 500;
    letter-spacing: 0.2em;
    color: var(--volt-orange);
    text-transform: uppercase;
    margin-bottom: 16px;
    padding: 6px 16px;
    border: 1px solid var(--color-border-accent);
    border-radius: 4px;
    background: rgba(232, 72, 47, 0.05);
    animation: fadeInUp 1s ease 0.1s backwards;
}

.hero h1 {
    font-size: 72px;
    font-weight: 800;
    letter-spacing: -3px;
    margin-bottom: 12px;
    line-height: 1.05;
    animation: fadeInUp 1s ease 0.2s backwards;
    background: linear-gradient(180deg, #ffffff 0%, #b8b8bd 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero .subtitle {
    font-size: 24px;
    font-weight: 400;
    color: var(--color-text-secondary);
    margin-bottom: 20px;
    letter-spacing: -0.5px;
    animation: fadeInUp 1s ease 0.4s backwards;
}

.hero .description {
    font-size: 17px;
    font-weight: 400;
    color: #b3b3b6;
    margin-bottom: 32px;
    line-height: 1.6;
    max-width: 680px;
    margin-left: auto;
    margin-right: auto;
    animation: fadeInUp 1s ease 0.6s backwards;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 1s ease 0.8s backwards;
}

/* Hero Stats Bar */
.hero-stats {
    display: flex;
    gap: 48px;
    margin-top: 48px;
    padding-top: 32px;
    border-top: 1px solid var(--color-border);
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 1s ease 1s backwards;
    width: 100%;
    max-width: 600px;
}

.hero-stat {
    text-align: center;
}

.hero-stat-value {
    font-family: var(--font-mono);
    font-size: 28px;
    font-weight: 700;
    color: var(--volt-orange);
    letter-spacing: -1px;
    line-height: 1;
}

.hero-stat-label {
    font-size: 11px;
    color: var(--color-text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-top: 6px;
    font-family: var(--font-mono);
}

/* ==========================================================================
   3. Layout - Buttons (재사용 가능한 컴포넌트)
   ========================================================================== */

.btn {
    padding: 14px 32px;
    border-radius: var(--radius-full);
    text-decoration: none;
    font-size: 16px;
    font-weight: 600;
    transition: all 0.3s ease;
    display: inline-block;
    letter-spacing: -0.01em;
    cursor: pointer;
    border: none;
    font-family: inherit;
}

.btn-primary {
    background: var(--volt-orange);
    color: #fff;
    box-shadow: 0 4px 20px rgba(232, 72, 47, 0.3);
}

.btn-primary:hover {
    background: var(--volt-orange-light);
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(232, 72, 47, 0.45);
}

.btn-secondary {
    background: transparent;
    color: var(--color-text-primary);
    border: 1.5px solid rgba(255, 255, 255, 0.2);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.4);
    transform: translateY(-2px);
}

.btn:focus-visible {
    outline: 2px solid var(--volt-orange);
    outline-offset: 4px;
}

/* ==========================================================================
   3. Layout - Sections
   ========================================================================== */

.section {
    width: 100%;
    padding: 100px 22px;
    position: relative;
    border-top: 1px solid var(--color-border);
    display: none;
}

.section.active {
    display: block;
}

.section-content {
    max-width: 1400px;
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-header h2 {
    font-size: 52px;
    font-weight: 700;
    letter-spacing: -2px;
    margin-bottom: 16px;
    line-height: 1.1;
}

.section-header h2 .accent {
    color: var(--volt-orange);
}

.section-header p {
    font-size: 20px;
    color: var(--color-text-secondary);
    font-weight: 400;
    letter-spacing: -0.3px;
}

/* ==========================================================================
   4. Content - About Section
   ========================================================================== */

.about {
    background: #000;
}

.about-intro,
.culture-section,
.about-info,
.join-cta,
.hub-content {
    background: rgba(255, 255, 255, 0.02);
    border-radius: var(--radius-md);
    padding: 56px 48px;
    border: 1px solid var(--color-border);
}

.about-intro {
    margin-bottom: 56px;
    position: relative;
    overflow: hidden;
}

.about-intro::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(180deg, var(--volt-orange) 0%, transparent 100%);
}

.culture-section,
.about-info {
    margin-top: 56px;
}

.about-intro h3,
.culture-section h3,
.about-info h3,
.join-cta h3,
.hub-content h3 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 20px;
    letter-spacing: -0.8px;
}

.culture-section h3 {
    margin-bottom: 32px;
    text-align: center;
}

.about-intro p {
    font-size: 16px;
    color: var(--color-text-secondary);
    line-height: 1.8;
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    margin-top: 56px;
}

/* ==========================================================================
   4. Content - Cards (Reusable)
   ========================================================================== */

.card {
    background: var(--color-bg-card);
    border-radius: var(--radius-md);
    padding: 40px 32px;
    transition: all 0.3s ease;
    border: 1px solid var(--color-border);
    position: relative;
    overflow: hidden;
}

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

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--volt-orange);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s ease;
}

.card:hover::before {
    transform: scaleX(1);
}

.about-card h3 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 12px;
    letter-spacing: -0.5px;
}

.about-card p {
    font-size: 15px;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

.culture-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
}

.culture-item {
    background: rgba(0, 0, 0, 0.4);
    border-radius: var(--radius-sm);
    padding: 28px 24px;
    border: 1px solid var(--color-border);
    border-left: 3px solid var(--volt-orange);
}

.culture-item h4 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--color-text-primary);
}

.culture-item p {
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

.about-info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 32px;
    margin-top: 32px;
}

.info-item {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 20px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border);
}

.info-label {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--volt-orange);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-weight: 500;
}

.info-value {
    font-size: 18px;
    font-weight: 600;
    color: var(--color-text-primary);
}

/* ==========================================================================
   4. Content - Timeline (연혁)
   ========================================================================== */

.timeline-section {
    background: linear-gradient(180deg, #000 0%, #0a0a0a 100%);
}

.timeline {
    position: relative;
    max-width: 900px;
    margin: 60px auto 0;
    padding-left: 40px;
}

.timeline::before {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    left: 12px;
    width: 2px;
    background: linear-gradient(180deg, var(--volt-orange) 0%, rgba(232, 72, 47, 0.2) 100%);
}

.timeline-item {
    position: relative;
    padding-bottom: 40px;
    padding-left: 32px;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -36px;
    top: 8px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--volt-orange);
    box-shadow: 0 0 0 4px rgba(232, 72, 47, 0.2), 0 0 20px rgba(232, 72, 47, 0.5);
}

.timeline-date {
    font-family: var(--font-mono);
    font-size: 13px;
    color: var(--volt-orange);
    font-weight: 600;
    letter-spacing: 0.05em;
    margin-bottom: 8px;
}

.timeline-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: 6px;
    letter-spacing: -0.3px;
}

.timeline-desc {
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* ==========================================================================
   4. Content - Leadership
   ========================================================================== */

.leadership {
    background: #000;
}

.leadership-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
    margin-top: 56px;
}

.leader-card {
    background: rgba(255, 255, 255, 0.02);
    border-radius: var(--radius-md);
    padding: 36px 28px;
    transition: all 0.3s ease;
    border: 1px solid var(--color-border);
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.leader-card:hover {
    background: rgba(255, 255, 255, 0.04);
    transform: translateY(-4px);
    border-color: var(--color-border-accent);
}

.leader-avatar {
    width: 72px;
    height: 72px;
    min-width: 72px;
    border-radius: 50%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    font-weight: 800;
    color: #fff;
}

.leader-info {
    flex: 1;
    text-align: left;
    min-width: 0; /* flex 자식 텍스트 오버플로우 방지 */
}

.leader-info h3 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 4px;
    letter-spacing: -0.5px;
}

.leader-role {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--volt-orange);
    margin-bottom: 12px;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    padding: 3px 8px;
    background: rgba(232, 72, 47, 0.1);
    border-radius: 4px;
}

.leader-contact {
    font-size: 12px;
    color: var(--color-text-tertiary);
    margin-bottom: 12px;
    font-family: var(--font-mono);
    background: rgba(255, 255, 255, 0.03);
    padding: 6px 10px;
    border-radius: 6px;
    display: inline-block;
    border: 1px solid var(--color-border);
    word-break: break-all;
}

.leader-description {
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: 12px;
}

.leader-duties {
    font-size: 13px;
    color: var(--color-text-tertiary);
    line-height: 1.6;
}

.leader-duties strong {
    color: var(--volt-orange);
    font-weight: 600;
}

/* CEO Special Card */
.leader-card.ceo-card {
    grid-column: 1 / -1;
    max-width: 100%;
    background: linear-gradient(135deg, rgba(232, 72, 47, 0.05) 0%, rgba(255, 255, 255, 0.02) 100%);
    border: 1px solid var(--color-border-accent);
}

.leader-card.ceo-card .leader-avatar {
    background: linear-gradient(135deg, var(--volt-orange) 0%, var(--volt-orange-dark) 100%);
    width: 88px;
    height: 88px;
    min-width: 88px;
    font-size: 36px;
    box-shadow: 0 0 30px rgba(232, 72, 47, 0.3);
}

.leader-card.ceo-card .leader-info h3 {
    font-size: 26px;
}

.leader-card.ceo-card .leader-role {
    font-size: 12px;
}

.leader-card.ceo-card .leader-description {
    font-size: 15px;
    margin-bottom: 16px;
}

.leader-details {
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--color-border);
}

.leader-details-item {
    margin-bottom: 16px;
}

.leader-details-item strong {
    color: var(--volt-orange);
    display: block;
    margin-bottom: 6px;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-family: var(--font-mono);
}

.leader-details-item p {
    font-size: 13px;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

.leader-competencies {
    margin-top: 16px;
}

.leader-competencies strong {
    color: var(--color-text-primary);
    display: block;
    margin-bottom: 12px;
    font-size: 13px;
    font-weight: 600;
}

.leader-competencies ul {
    list-style: none;
    padding-left: 0;
}

.leader-competencies li {
    font-size: 13px;
    color: var(--color-text-secondary);
    line-height: 1.7;
    padding-left: 16px;
    position: relative;
}

.leader-competencies li::before {
    content: "▸";
    position: absolute;
    left: 0;
    color: var(--volt-orange);
}

/* ==========================================================================
   4. Content - Hub Section
   ========================================================================== */

.hub {
    background: linear-gradient(180deg, #000 0%, #0a0a0a 100%);
}

.hub-content {
    margin-top: 0;
}

.hub-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
    margin-top: 32px;
}

.hub-feature {
    background: rgba(0, 0, 0, 0.4);
    border-radius: var(--radius-sm);
    padding: 24px;
    border: 1px solid var(--color-border);
    border-top: 3px solid var(--volt-orange);
}

.hub-feature h4 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--color-text-primary);
}

.hub-feature ul {
    list-style: none;
}

.hub-feature li {
    font-size: 13px;
    color: var(--color-text-secondary);
    line-height: 1.8;
    padding-left: 16px;
    position: relative;
}

.hub-feature li::before {
    content: "·";
    position: absolute;
    left: 0;
    color: var(--volt-orange);
    font-weight: 700;
    font-size: 18px;
    line-height: 1;
}

.hub-notice {
    margin-top: 32px;
    padding: 20px 24px;
    background: rgba(232, 72, 47, 0.05);
    border-left: 3px solid var(--volt-orange);
    border-radius: 4px;
    font-size: 13px;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* ==========================================================================
   4. Content - Streamers (이미지 적용)
   ========================================================================== */

.streamers {
    background: #000;
}

.streamers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 28px;
    margin-top: 56px;
}

.streamer-card {
    background: var(--color-bg-card);
    border-radius: var(--radius-md);
    padding: 40px 28px;
    text-align: center;
    transition: all 0.3s ease;
    border: 1px solid var(--color-border);
    will-change: transform;
}

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

/* 스트리머 프로필 이미지 (사진 적용) */
.streamer-icon {
    width: 110px;
    height: 110px;
    border-radius: 50%;
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    border: 3px solid var(--color-border);
    transition: border-color 0.3s ease;
    background: var(--color-bg-secondary);
}

.streamer-card:hover .streamer-icon {
    border-color: var(--volt-orange);
    box-shadow: 0 0 30px rgba(232, 72, 47, 0.3);
}

.streamer-icon img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

/* Fallback 이모지 (이미지 없을 때) */
.streamer-icon-fallback {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 48px;
}

.streamer-card h3 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 6px;
    letter-spacing: -0.5px;
}

.streamer-platform {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--volt-orange);
    font-weight: 600;
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    padding: 3px 10px;
    background: rgba(232, 72, 47, 0.1);
    border-radius: 4px;
}

.streamer-description {
    font-size: 13px;
    color: var(--color-text-tertiary);
    margin-bottom: 24px;
    font-style: italic;
}

.streamer-details {
    text-align: left;
    margin-bottom: 28px;
}

.streamer-sub-section {
    background: rgba(0, 0, 0, 0.3);
    border-radius: var(--radius-sm);
    padding: 18px;
    margin-bottom: 12px;
    border: 1px solid var(--color-border);
}

.streamer-sub-section:last-child {
    margin-bottom: 0;
}

.streamer-sub-section h4 {
    font-size: 13px;
    font-weight: 700;
    color: var(--volt-orange);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.streamer-sub-section p {
    font-size: 13px;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

.streamer-link {
    display: inline-block;
    padding: 10px 24px;
    background: #00d962;
    color: #000;
    text-decoration: none;
    border-radius: var(--radius-full);
    font-weight: 700;
    font-size: 14px;
    transition: all 0.3s ease;
}

.streamer-link:hover {
    background: #00f170;
    transform: scale(1.05);
}

.streamer-link:focus-visible {
    outline: 2px solid #00f170;
    outline-offset: 4px;
}

/* ==========================================================================
   4. Content - Gallery
   ========================================================================== */

.gallery {
    background: linear-gradient(180deg, #000 0%, #0a0a0a 100%);
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 16px;
    margin-top: 56px;
}

.gallery-item {
    aspect-ratio: 16/9;
    background: rgba(255, 255, 255, 0.03);
    border-radius: var(--radius-sm);
    overflow: hidden;
    transition: all 0.3s ease;
    border: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 48px;
    color: rgba(255, 255, 255, 0.2);
    will-change: transform;
}

.gallery-item:hover {
    transform: scale(1.02);
    background: rgba(255, 255, 255, 0.06);
    border-color: var(--color-border-accent);
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.gallery-notice {
    text-align: center;
    margin-top: 32px;
    padding: 20px;
    background: rgba(232, 72, 47, 0.05);
    border: 1px dashed var(--color-border-accent);
    border-radius: var(--radius-sm);
    color: var(--color-text-tertiary);
    font-size: 13px;
    font-family: var(--font-mono);
}

/* ==========================================================================
   4. Content - Join Section
   ========================================================================== */

.join {
    background: #000;
}

.join-content {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.join-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
    margin: 56px 0;
}

.join-step {
    background: rgba(255, 255, 255, 0.02);
    border-radius: var(--radius-md);
    padding: 36px 28px;
    border: 1px solid var(--color-border);
    transition: all 0.3s ease;
    position: relative;
}

.join-step:hover {
    background: rgba(255, 255, 255, 0.04);
    transform: translateY(-4px);
    border-color: var(--color-border-accent);
}

.step-number {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--volt-orange) 0%, var(--volt-orange-dark) 100%);
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: 800;
    color: #fff;
    box-shadow: 0 4px 20px rgba(232, 72, 47, 0.3);
}

.join-step h4 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 10px;
}

.join-step p {
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

.join-cta {
    margin-top: 40px;
    text-align: center;
}

.join-cta p {
    font-size: 16px;
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: 32px;
}

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

/* ==========================================================================
   3. Layout - Footer
   ========================================================================== */

.footer {
    width: 100%;
    background: #000;
    padding: 80px 22px 40px;
    border-top: 1px solid var(--color-border);
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 48px;
    margin-bottom: 56px;
}

.footer-section h4 {
    font-family: var(--font-mono);
    font-size: 12px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--volt-orange);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.footer-section ul {
    list-style: none;
}

.footer-section li {
    margin-bottom: 10px;
}

.footer-section a {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.2s ease;
    cursor: pointer;
}

.footer-section a:hover {
    color: var(--volt-orange);
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.footer-brand img {
    width: 40px;
    height: 40px;
    object-fit: contain;
}

.footer-brand-text {
    font-size: 18px;
    font-weight: 800;
    color: var(--volt-orange);
}

.footer-description {
    color: var(--color-text-secondary);
    font-size: 13px;
    line-height: 1.7;
}

.footer-bottom {
    text-align: center;
    padding-top: 32px;
    border-top: 1px solid var(--color-border);
}

.footer-bottom p {
    font-size: 12px;
    color: var(--color-text-tertiary);
    font-family: var(--font-mono);
}

/* ==========================================================================
   5. Animations
   ========================================================================== */

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

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* ==========================================================================
   6. Responsive
   ========================================================================== */

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .hamburger {
        display: flex;
    }

    .hero {
        padding: 90px 22px 60px;
    }

    .hero h1 {
        font-size: 52px;
        letter-spacing: -2px;
    }

    .hero .subtitle {
        font-size: 19px;
    }

    .hero .description {
        font-size: 15px;
    }

    .hero-logo {
        width: 150px;
        margin-top: -10px;
        margin-bottom: -5px;
    }

    .hero-logo-fallback {
        width: 120px;
        height: 120px;
        font-size: 48px;
    }

    .hero-stats {
        gap: 24px;
        margin-top: 36px;
    }

    .hero-stat-value {
        font-size: 22px;
    }

    .section-header h2 {
        font-size: 36px;
        letter-spacing: -1px;
    }

    .section-header p {
        font-size: 16px;
    }

    .section {
        padding: 64px 22px;
    }

    .about-grid,
    .leadership-grid,
    .streamers-grid {
        grid-template-columns: 1fr;
    }

    .about-intro,
    .about-info,
    .culture-section,
    .join-cta,
    .hub-content {
        padding: 36px 24px;
    }

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

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .leader-card {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .leader-info {
        text-align: center;
    }

    .leader-card.ceo-card {
        flex-direction: column;
        align-items: center;
    }

    .leader-card.ceo-card .leader-info {
        text-align: center;
    }

    .timeline {
        padding-left: 32px;
    }

    .timeline-item {
        padding-left: 20px;
    }
}

@media (max-width: 480px) {
    .nav-container {
        padding: 0 16px;
    }

    .hero {
        padding: 80px 16px 48px;
    }

    .hero-logo {
        width: 130px;
    }

    .hero h1 {
        font-size: 42px;
        line-height: 1.1;
    }

    .hero .subtitle {
        font-size: 16px;
    }

    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }

    .btn {
        width: 100%;
        text-align: center;
    }

    .section {
        padding: 48px 16px;
    }

    .section-header h2 {
        font-size: 30px;
    }

    .about-card,
    .leader-card,
    .streamer-card {
        padding: 28px 22px;
    }

    .join-steps {
        grid-template-columns: 1fr;
    }
}