:root {
    --text-primary: #020617; /* Slate 950 */
    --text-secondary: #475569; /* Slate 600 */
    --accent: #2563EB;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: #FAFAFA;
    color: var(--text-primary);
    margin: 0;
    padding: 0;
    line-height: 1.6;
    overflow-x: hidden;
}

h1, h2, h3, .logo {
    font-family: 'Inter', sans-serif;
}

/* Ethereal Background */
.refraction-background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    overflow: hidden;
    background: #FAFAFA;
}

.orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(120px);
    opacity: 0.6;
    animation: float 25s infinite ease-in-out alternate;
}

.orb-1 {
    width: 60vw;
    height: 60vw;
    background: #E0F2FE; /* Light sky blue */
    top: -10%;
    left: -10%;
}

.orb-2 {
    width: 50vw;
    height: 50vw;
    background: #F3E8FF; /* Light purple */
    bottom: -20%;
    right: -10%;
    animation-delay: -5s;
}

.orb-3 {
    width: 40vw;
    height: 40vw;
    background: #FFE4E6; /* Light rose */
    top: 40%;
    left: 30%;
    animation-delay: -10s;
}

@keyframes float {
    0% { transform: translate(0, 0) scale(1) rotate(0deg); }
    100% { transform: translate(100px, 150px) scale(1.2) rotate(45deg); }
}

/* Typography Overrides */
.hero h1 {
    font-size: clamp(44px, 6vw, 72px);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 24px;
    letter-spacing: -1px;
}

.text-accent {
    font-family: 'Inter', sans-serif;
    font-style: normal;
    font-weight: 800;
    color: var(--accent);
    display: inline-block;
    letter-spacing: -2px;
}

/* Navigation - Simple wordmark */
.navbar {
    position: relative;
    z-index: 100;
    display: flex;
    justify-content: center;
    padding: 120px 24px 12px;
    pointer-events: none;
}

.logo {
    font-size: clamp(64px, 10vw, 124px);
    font-weight: 700;
    letter-spacing: -2.5px;
    color: var(--text-primary);
    pointer-events: auto;
}

/* Layout */
.wrap {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 24px 80px;
}

.hero {
    text-align: center;
    padding: 24px 0 120px;
}

/* Hero elements */
.hero-badge {
    font-family: 'Inter', sans-serif;
    display: inline-block;
    padding: 8px 16px;
    background: rgba(255, 255, 255, 0.5);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(0, 0, 0, 0.05);
    border-radius: 100px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 40px;
    color: var(--text-secondary);
}

.tagline {
    font-family: 'Inter', sans-serif;
    font-size: clamp(18px, 2vw, 22px);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 48px;
    line-height: 1.6;
}

.hero-actions {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 16px;
}

/* Asymmetric Grid */
.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
}
@media (max-width: 768px) {
    .grid-2 { grid-template-columns: 1fr; }
}

/* Cards - Ethereal, floating */
.glass-card {
    background: rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.8);
    border-radius: 32px;
    padding: 48px;
    box-shadow: 0 20px 40px -10px rgba(0, 0, 0, 0.03);
    transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.5s ease;
}

.glass-card:hover {
    transform: translateY(-8px) scale(1.01);
    box-shadow: 0 30px 60px -15px rgba(0, 0, 0, 0.06);
}

/* Add slight asymmetry */
.architecture .glass-card:nth-child(2) {
    transform: translateY(40px);
}
.architecture .glass-card:nth-child(2):hover {
    transform: translateY(32px) scale(1.01);
}
@media (max-width: 768px) {
    .architecture .glass-card:nth-child(2) {
        transform: translateY(0);
    }
    .architecture .glass-card:nth-child(2):hover {
        transform: translateY(-8px) scale(1.01);
    }
}

.card-icon {
    font-size: 36px;
    margin-bottom: 32px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 64px;
    height: 64px;
    background: #FFFFFF;
    border-radius: 50%;
    box-shadow: 0 8px 16px -4px rgba(0, 0, 0, 0.05);
}

h2 {
    font-size: clamp(36px, 4vw, 48px);
    margin: 0 0 24px;
    text-align: center;
}

.section-subtitle {
    text-align: center;
    color: var(--text-secondary);
    font-size: 20px;
    margin: 0 auto 80px;
    max-width: 500px;
}

.glass-card h3 {
    font-size: 28px;
    margin-bottom: 16px;
}

.feature-card p {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 32px;
}

.feature-list {
    list-style: none;
    padding: 0;
    margin: 0 0 40px;
}

.feature-list li {
    position: relative;
    padding-left: 24px;
    margin-bottom: 16px;
    color: var(--text-secondary);
    font-size: 15px;
}

.feature-list li code {
    background: rgba(0,0,0,0.03);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: monospace;
    font-size: 13px;
    color: var(--text-primary);
}

.feature-list li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 8px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--text-primary);
}

.badge {
    font-family: 'Inter', sans-serif;
    display: inline-block;
    padding: 4px 12px;
    border-radius: 100px;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 32px;
    background: #FFFFFF;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.badge-unity { color: #059669; }
.badge-python { color: #D97706; }

/* Buttons */
.btn {
    font-family: 'Inter', sans-serif;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 16px 36px;
    border-radius: 100px;
    font-weight: 500;
    font-size: 15px;
    text-decoration: none;
    transition: all 0.3s ease;
}

.btn-primary {
    background: var(--text-primary);
    color: #FFFFFF;
}

.btn-primary:hover {
    transform: scale(1.05);
    background: #000000;
    box-shadow: 0 10px 20px -5px rgba(0, 0, 0, 0.1);
}

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

.btn-secondary:hover {
    background: var(--text-primary);
    color: #FFFFFF;
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid rgba(0,0,0,0.1);
    padding: 10px 24px;
    font-size: 14px;
    border-radius: 100px;
}

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

/* Logos */
.supported-by {
    margin-top: 160px;
    padding: 100px 0;
    text-align: center;
}

.supported-by-label {
    font-family: 'Inter', sans-serif;
    font-size: 11px;
    letter-spacing: 4px;
    text-transform: uppercase;
    color: #94A3B8;
    margin-bottom: 48px;
    font-weight: 600;
}

.supported-by-logos {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 80px;
}

.supported-by-logos img {
    height: 48px;
    width: auto;
    transition: all 0.5s ease;
}

.supported-by-logos img:hover {
    transform: scale(1.1);
}

/* Footer */
footer {
    text-align: center;
    padding: 40px 24px;
    margin-top: 60px;
}

.muted {
    font-family: 'Inter', sans-serif;
    color: #94A3B8;
    font-size: 13px;
    letter-spacing: 1px;
}

.muted a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s;
}

.muted a:hover {
    color: var(--accent);
}

/* Animations */
.slide-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 1s cubic-bezier(0.16, 1, 0.3, 1), transform 1s cubic-bezier(0.16, 1, 0.3, 1);
}

.fade-in {
    opacity: 0;
    transition: opacity 1.2s ease-out;
}

.visible {
    opacity: 1;
    transform: translateY(0);
}

.about, .architecture, .gallery, .dev-bids {
    margin-top: 160px;
}

/* Dev & BIDS Section */
.dev-card {
    display: flex;
    flex-direction: column;
}

/* BIDS Window */
.bids-card {
    grid-column: 1 / -1;
}

.bids-window {
    background: #FFFFFF;
    border-radius: 12px;
    margin-top: 24px;
    padding: 24px;
    box-shadow: inset 0 2px 10px rgba(0,0,0,0.02);
    border: 1px solid rgba(0,0,0,0.05);
}

.file-tree {
    list-style: none;
    padding: 0;
    margin: 0;
    font-family: 'Consolas', 'Courier New', monospace;
    font-size: 14px;
    color: var(--text-secondary);
}

.file-tree ul {
    list-style: none;
    padding-left: 20px;
    margin: 4px 0;
    border-left: 1px solid rgba(0,0,0,0.1);
}

.file-tree li {
    margin: 8px 0;
    position: relative;
}

.file-tree li::before {
    content: "";
    position: absolute;
    left: -20px;
    top: 10px;
    width: 12px;
    height: 1px;
    background: rgba(0,0,0,0.1);
}

.root-folder::before {
    display: none;
}

.folder {
    color: var(--text-primary);
    font-weight: 600;
}

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

.highlight-file {
    color: var(--accent);
    font-weight: 600;
    background: rgba(37, 99, 235, 0.1);
    padding: 2px 6px;
    border-radius: 4px;
}

/* Preprint Section */
.preprint {
    margin-top: 160px;
}

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

.badge-preprint {
    color: var(--accent);
}

.preprint-title {
    margin: 0 0 16px;
}

.preprint-status {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
    margin: 0 0 24px;
    padding: 8px 18px;
    background: rgba(37, 99, 235, 0.06);
    border: 1px solid rgba(37, 99, 235, 0.15);
    border-radius: 100px;
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 0 0 rgba(37, 99, 235, 0.5);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(37, 99, 235, 0.4); }
    70% { box-shadow: 0 0 0 8px rgba(37, 99, 235, 0); }
    100% { box-shadow: 0 0 0 0 rgba(37, 99, 235, 0); }
}

.preprint-desc {
    font-size: 16px;
    color: var(--text-secondary);
    max-width: 560px;
    margin: 0 auto 32px;
}

.doi-box {
    display: inline-flex;
    align-items: center;
    gap: 14px;
    background: #FFFFFF;
    border: 1px solid rgba(0, 0, 0, 0.06);
    border-radius: 14px;
    padding: 12px 20px;
    margin-bottom: 32px;
    box-shadow: 0 8px 16px -8px rgba(0, 0, 0, 0.06);
    max-width: 100%;
}

.doi-label {
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    color: #94A3B8;
    flex-shrink: 0;
}

.doi-link {
    font-family: 'Consolas', 'Courier New', monospace;
    font-size: 15px;
    color: var(--accent);
    text-decoration: none;
    word-break: break-all;
    transition: color 0.2s;
}

.doi-link:hover {
    color: var(--text-primary);
    text-decoration: underline;
}

/* Gallery Section */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
}

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

.gallery-card {
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.gallery-img {
    width: 100%;
    border-radius: 16px;
    box-shadow: 0 10px 30px -10px rgba(0,0,0,0.1);
    transition: transform 0.5s ease;
    object-fit: cover;
    aspect-ratio: 16 / 9;
}

.gallery-card:hover .gallery-img {
    transform: scale(1.02);
}

.gallery-info h4 {
    font-family: 'Inter', sans-serif;
    font-weight: 700;
    font-size: 24px;
    margin: 0 0 8px 0;
}

.gallery-info p {
    color: var(--text-secondary);
    margin: 0;
    font-size: 15px;
}

/* Mobile scaling fixes */
html, body {
    overflow-x: hidden;
    width: 100%;
}

@media (max-width: 768px) {
    .wrap {
        padding: 16px 18px 60px;
    }

    .navbar {
        padding: 56px 18px 8px;
    }

    .hero {
        padding: 16px 0 80px;
    }

    /* Tighten the big section gaps on small screens */
    .about, .architecture, .gallery, .dev-bids, .preprint {
        margin-top: 90px;
    }

    .section-subtitle {
        margin-bottom: 48px;
        font-size: 18px;
    }

    /* Cards: less padding so content fits narrow screens */
    .glass-card {
        padding: 28px 24px;
        border-radius: 24px;
    }

    .glass-card h3 {
        font-size: 24px;
    }

    /* Let the long BIDS filenames scroll instead of widening the page */
    .bids-window {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    .file-tree {
        white-space: nowrap;
    }

    /* Supported-by logos: smaller gap so they don't overflow */
    .supported-by {
        margin-top: 100px;
        padding: 60px 0;
    }

    .supported-by-logos {
        gap: 36px;
    }

    .supported-by-logos img {
        height: 40px;
    }

    /* DOI box stays inside the card */
    .doi-box {
        flex-direction: column;
        gap: 6px;
        align-items: flex-start;
    }
}