:root {
    --color-bg: #000000;
    --color-text: #ffffff;
    --color-muted: rgba(255, 255, 255, 0.7);
    --color-accent: rgba(255, 255, 255, 0.1);
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 2rem;
    --space-lg: 4rem;
    --space-xl: 8rem;
}

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Space Grotesk', sans-serif;
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    overflow-x: hidden;
    scroll-behavior: smooth;
}

body.lighting-page {
    height: 100vh;
    overflow-y: auto;
    background: transparent;
}

/* Text Selection */
::selection {
    background: rgba(255, 255, 255, 0.2);
    color: #ffffff;
}

/* Floating Home Button */
.floating-home {
    position: fixed;
    top: 2rem;
    left: 2rem;
    width: 3.85rem;  /* Increased by 10% from 3.5rem */
    height: 3.85rem; /* Increased by 10% from 3.5rem */
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    transition: transform 0.3s ease;
}

.floating-home:hover {
    transform: scale(1.1);
}

.floating-logo {
    width: 3.52rem;  /* Increased by 10% from 3.2rem */
    height: 3.52rem; /* Increased by 10% from 3.2rem */
    object-fit: contain;
    transition: transform 0.3s ease, opacity 0.3s ease;
}

.floating-home:hover .floating-logo {
    transform: rotate(-5deg);
    opacity: 0.9;
}

.home-tooltip {
    position: absolute;
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    font-size: 0.85rem;
    left: 120%;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

/* Back link styles */
:root { --back-link-size: clamp(16px, 1.2vw, 18px); }

.back-link{
  position: fixed;
  top: 18px;
  right: 18px;
  z-index: 2147483647;

  font-size: calc(var(--back-link-size) * 1.15); /* +15% */
  font-weight: 700;
  letter-spacing: 0.02em;
  text-decoration: none;
  background: none;
  border: 0;
  cursor: pointer;

  /* auto-invert vs. whatever is behind */
  color: #fff;
  mix-blend-mode: difference;

  transform-origin: right center;
  transition: transform .15s ease;
}
.back-link:hover{ transform: scale(1.06); }
.back-link:active{ transform: scale(1.03); }

/* Hide on Home */
body.page-home .back-link,
body.home .back-link{ display:none; }

/* Collection Intro */
.collection-intro {
    width: 100%;
    margin: 0;
    padding: 0;
    background: transparent;
}

.intro-background {
    width: 100%;
    height: 80vh;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    position: relative;
}

.intro-content {
    position: absolute;
    bottom: 15vh;
    left: 5vw;
    right: 5vw;
    padding: 0;
    background: none;
}

.intro-text {
    font-size: clamp(1.4em, 2.5vw, 2em);
    line-height: 1.6;
    font-weight: 300;
    color: var(--color-text);
    opacity: 1;
    max-width: 600px;
    margin: 0;
    letter-spacing: 0.02em;
    position: relative;
    text-shadow: 
        -1px -1px 0 rgba(0,0,0,0.3),
        1px -1px 0 rgba(0,0,0,0.3),
        -1px 1px 0 rgba(0,0,0,0.3),
        1px 1px 0 rgba(0,0,0,0.3),
        2px 2px 4px rgba(0,0,0,0.2);
}

/* Remove the global gradient overlay to let the image shine */
.intro-background::after {
    display: none;
}

@media (max-width: 768px) {
    .intro-background {
        height: 90vh;
    }
    
    .intro-content {
        bottom: 10vh;
        left: 1.5rem;
        right: 1.5rem;
    }
    
    .intro-text {
        font-size: clamp(1.2em, 4vw, 1.6em);
        padding: 1.25rem 1.5rem;
        width: calc(100% - 3rem);
        box-sizing: border-box;
    }
}

/* Subtle animation for text box */
.intro-text {
    transition: background-color 0.3s ease, transform 0.3s ease;
}

.intro-text:hover {
    background-color: rgba(0, 0, 0, 0.3);
    transform: translateY(-2px);
}

/* RIBS Collection Styles */
.models-grid {
    padding: 5vw;
    background: #111111;
}

.grid-intro {
    margin-bottom: 5vh;
    padding-bottom: 2vh;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.collection-label {
    font-size: 1.2em;
    letter-spacing: 0.05em;
    color: #ffffff;
    opacity: 0.7;
}

.model-sections {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 4vw;
    padding: 2vw 0;
}

@media (max-width: 1024px) {
    .model-sections {
        grid-template-columns: 1fr;
        gap: 8vh;
    }
}

.model-section {
    padding: 2rem;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 8px;
    transition: transform 0.3s ease;
}

.model-section:hover {
    transform: translateY(-4px);
}

.model-title {
    font-size: 1.8em;
    font-weight: 300;
    margin-bottom: 1rem;
    letter-spacing: 0.02em;
}

.model-description {
    font-size: 1em;
    line-height: 1.6;
    color: var(--color-muted);
    margin-bottom: 2rem;
}

.materials-list {
    margin: 2rem 0;
    padding: 1.5rem;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 4px;
}

.materials-list h3 {
    font-size: 0.9em;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 1rem;
    color: var(--color-muted);
}

.materials-list ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.materials-list li {
    font-size: 0.95em;
    margin-bottom: 0.5rem;
    color: var(--color-text);
}

.model-images {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
    margin-top: 2rem;
}

.model-images img {
    width: 100%;
    height: auto;
    border-radius: 4px;
    transition: opacity 0.3s ease;
}

.model-images img:hover {
    opacity: 0.8;
}

/* Mirror System Styles */
.mirror-section {
    padding: 15vh 5vw;
    background: #0a0a0a;
    color: #ffffff;
}

.mirror-intro {
    max-width: 800px;
    margin: 0 auto 8vh;
    text-align: center;
}

.mirror-title {
    font-size: clamp(2em, 5vw, 3.5em);
    font-weight: 300;
    margin-bottom: 2em;
    letter-spacing: 0.02em;
}

.mirror-text {
    font-size: clamp(1.2em, 3vw, 1.8em);
    line-height: 1.6;
    font-weight: 300;
    opacity: 0.8;
}

.mirror-grid {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 5vw;
    max-width: 1400px;
    margin: 0 auto;
}

/* Video Header */
.video-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    z-index: 1;
    background: transparent;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    min-width: 100%;
    min-height: 100%;
    position: relative;
    z-index: 2;
    background: transparent;
}

.video-header .video-overlay {
    position: absolute;
    bottom: 5vh;
    left: 5vw;
    text-align: left;
    color: white;
    font-family: 'Space Grotesk', sans-serif;
    z-index: 12;
    mix-blend-mode: difference;
}

.video-header .video-overlay h1 {
    font-size: 3.5rem;
    font-weight: 300;
    margin: 0;
    letter-spacing: 0.02em;
}

.video-header .video-overlay p {
    font-size: 1.4rem;
    margin: 0;
    margin-top: 0.5rem;
    font-weight: 300;
    opacity: 0.9;
}

/* Lighting Overview Styles */
.lighting-overview {
    position: relative;
    padding: 15vh 5vw 10vh;
    background: var(--color-bg);
    min-height: 100vh;
    z-index: 3;
    margin-top: 100vh;
}

.lighting-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 5vw;
    max-width: 1400px;
    margin: 0 auto;
    position: relative;
}

.collection-card {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    background: rgba(255, 255, 255, 0.03);
    transition: transform 0.3s ease;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.collection-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
}

.collection-image {
    width: 100%;
    height: 70vh;
    object-fit: cover;
}

.collection-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 2rem;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.9), rgba(0, 0, 0, 0));
    color: #ffffff;
}

.collection-title {
    font-size: 2em;
    font-weight: 300;
    margin-bottom: 0.5rem;
    letter-spacing: 0.02em;
}

.collection-subtitle {
    font-size: 1em;
    color: var(--color-muted);
    margin-bottom: 1rem;
}

.collection-link {
    display: inline-block;
    color: #ffffff;
    text-decoration: none;
    font-size: 0.9em;
    letter-spacing: 0.05em;
    opacity: 0.7;
    transition: opacity 0.3s ease;
}

.collection-link:hover {
    opacity: 1;
}

/* Footer */
.site-footer {
    padding: 10vh 5vw;
    background: #000000;
    color: #ffffff;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 2em;
}

/* Responsive Styles */
@media (max-width: 768px) {
    .floating-home {
        top: 1.5rem;
        left: 1.5rem;
        width: 3rem;
        height: 3rem;
    }

    .floating-logo {
        width: 1.75rem;
        height: 1.75rem;
    }

    .home-tooltip {
        display: none;
    }

    .mirror-grid {
        grid-template-columns: 1fr;
        gap: 3em;
    }

    .lighting-grid {
        grid-template-columns: 1fr;
        gap: 4vh;
    }

    .collection-image {
        height: 50vh;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
        gap: 3em;
    }
}