:root {
    --bg-primary: #0A0C0F;
    --bg-elevated: #12151C;
    --border-sharp: 1px solid #2A2F38;
    --border-accent: 1px solid #3F4A5A;
    --text-primary: #F0F4F9;
    --text-secondary: #A8B2C2;
    --accent-solid: #3B82F6;
    --accent-edge: #1E293B;
    --card-bg: #0F1117;
}

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

body {
    font-family: 'Inter', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    overflow-x: hidden;
    line-height: 1.4;
    font-weight: 400;
}

body.detail-mode {
    --bg-primary: #0C0E12;
    --bg-elevated: #111418;
    --border-sharp: 1px solid #23272F;
    --accent-solid: #5A6E8A;
}

body.detail-mode .future-sections,
body.detail-mode .hub-hero {
    filter: none;
}

body.detail-mode .section-card {
    background: var(--bg-elevated);
    border: var(--border-sharp);
    box-shadow: none;
}

#intro-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: #000000;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 200;
}

.intro-content {
    text-align: center;
    opacity: 0;
    transition: opacity 0.45s cubic-bezier(0.2, 0.9, 0.4, 1.1);
}

.intro-icon {
    width: 100px;
    height: auto;
    margin-bottom: 24px;
    opacity: 0;
}

.intro-title {
    font-size: 2rem;
    font-weight: 500;
    letter-spacing: -0.01em;
    margin-top: 8px;
    opacity: 0;
    color: #FFFFFF;
    text-transform: uppercase;
}

.intro-click {
    font-size: 0.75rem;
    font-weight: 400;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    margin-top: 64px;
    opacity: 0;
    color: #B0B7C5;
}

@keyframes swingMotion {
    0% { transform: rotate(0deg); }
    35% { transform: rotate(2deg); }
    70% { transform: rotate(-1.2deg); }
    100% { transform: rotate(0deg); }
}

#video-stage {
    background: #000000;
}

#hub-container {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow-y: auto;
    z-index: 50;
    background: var(--bg-primary);
}

.hub-bg {
    min-height: 100vh;
    background-size: cover;
    background-position: center center;
    background-repeat: no-repeat;
    position: relative;
}

.hub-overlay {
    position: relative;
    z-index: 2;
    background: rgba(5, 7, 10, 0.72);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    padding: 2rem 2.5rem;
}

.hub-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1.2rem;
    padding-bottom: 1rem;
    border-bottom: var(--border-sharp);
}

.logo-area {
    font-weight: 700;
    font-size: 0.9rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--text-primary);
    border-right: 2px solid var(--accent-solid);
    padding-right: 1rem;
}

.nav-rail {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.nav-pill {
    background: none;
    border: none;
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--text-secondary);
    cursor: default;
    padding: 0.2rem 0;
    font-family: inherit;
}

.mode-switch {
    background: transparent;
    border: var(--border-sharp);
    padding: 0.4rem 1rem;
    font-size: 0.7rem;
    font-weight: 500;
    font-family: inherit;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-secondary);
    cursor: pointer;
    background: var(--bg-elevated);
    transition: 0.1s linear;
}

.mode-switch:hover {
    border-color: var(--accent-solid);
    color: white;
}

.hub-hero {
    flex: 1;
    display: flex;
    align-items: center;
    margin: 4rem 0;
}

.hero-block {
    max-width: 700px;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 600;
    line-height: 1.1;
    letter-spacing: -0.02em;
    text-transform: uppercase;
    border-left: 4px solid var(--accent-solid);
    padding-left: 1.5rem;
    margin-bottom: 1.2rem;
    color: var(--text-primary);
}

.hero-subtitle {
    font-size: 1rem;
    color: var(--text-secondary);
    border-left: 1px solid #3E4A5C;
    padding-left: 1.5rem;
    max-width: 540px;
}

.hub-footer {
    margin-top: 2rem;
    padding: 1.2rem 0;
    border-top: var(--border-sharp);
    display: flex;
    justify-content: space-between;
    font-size: 0.7rem;
    color: #6F7885;
    text-transform: uppercase;
}

.future-sections {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
    padding: 3rem 2.5rem;
    background: var(--bg-primary);
    border-top: var(--border-sharp);
}

.section-card {
    background: var(--card-bg);
    border: var(--border-sharp);
    padding: 1.5rem;
    transition: none;
}

.card-border {
    width: 40px;
    height: 2px;
    background: var(--accent-solid);
    margin-bottom: 1rem;
}

.section-card h3 {
    font-size: 1.1rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.02em;
    margin-bottom: 0.8rem;
    color: var(--text-primary);
}

.section-card p {
    font-size: 0.85rem;
    line-height: 1.5;
    color: var(--text-secondary);
}

@media (max-width: 768px) {
    .hub-overlay {
        padding: 1.2rem;
    }
    .hero-title {
        font-size: 2.2rem;
    }
    .nav-rail {
        gap: 0.8rem;
    }
    .future-sections {
        padding: 2rem 1.2rem;
    }
}

@media (max-width: 600px) {
    .hub-header {
        flex-direction: column;
        align-items: flex-start;
    }
    .hero-title {
        font-size: 1.8rem;
    }
}

body.detail-mode .hub-overlay {
    background: rgba(8, 10, 14, 0.92);
}

body.detail-mode .hero-title {
    font-weight: 500;
    border-left-width: 2px;
}

body.detail-mode .future-sections {
    background: var(--bg-elevated);
}

body.detail-mode .section-card {
    border-left: 2px solid var(--accent-solid);
}