/* holos.works - Design Language Stylesheet */
/* Colors: #0B0B2B Deep Twilight, #00E5FF Electric Cyan, #FF9940 Amber, #FF2D6F Hot Pink, #9B8FBF Lavender, #5EC4D4 Teal, #E8E4DC Warm Parchment, #F0EDE8 Light Parchment, #07070F Near Black */

:root {
    --deep-twilight: #0B0B2B;
    --electric-cyan: #00E5FF;
    --amber: #FF9940;
    --hot-pink: #FF2D6F;
    --lavender: #9B8FBF;
    --teal: #5EC4D4;
    --warm-parchment: #E8E4DC;
    --light-parchment: #F0EDE8;
    --near-black: #07070F;
}

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

html {
    scroll-behavior: smooth;
}

body {
    background: var(--near-black);
    color: var(--warm-parchment);
    font-family: 'Alegreya', Georgia, serif;
    overflow-x: hidden;
    cursor: none;
}

/* Parallax Root */
#parallax-root {
    perspective: 1px;
    height: 100vh;
    overflow-x: hidden;
    overflow-y: auto;
    transform-style: preserve-3d;
}

/* Sections */
.parallax-section {
    position: relative;
    min-height: 100vh;
    transform-style: preserve-3d;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

/* Depth Layers */
.section-depth-layer {
    position: absolute;
    inset: 0;
    transform-style: preserve-3d;
}

.depth-far {
    transform: translateZ(-2px) scale(3);
}

.depth-mid {
    transform: translateZ(-1px) scale(2);
}

.depth-near {
    position: relative;
    transform: translateZ(0);
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 2rem;
}

/* ================================================
   COLLAGE FRAGMENTS - CSS-only photography
   ================================================ */
.collage-fragment {
    position: absolute;
    overflow: hidden;
    border-radius: 2px;
}

.gradient-layer {
    position: absolute;
    inset: 0;
}

/* Mountain Base - Approach Section */
.mountain-base {
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
}

.mountain-base .gradient-layer:first-child {
    background: linear-gradient(165deg, var(--deep-twilight) 0%, #1a1a4e 40%, #2d1b4e 70%, var(--near-black) 100%);
}

.mountain-base .layer-2 {
    background: linear-gradient(180deg, transparent 30%, rgba(0, 229, 255, 0.08) 60%, rgba(255, 41, 111, 0.05) 100%);
    mix-blend-mode: screen;
}

.mountain-base .layer-3 {
    background: 
        radial-gradient(ellipse 80% 50% at 70% 60%, rgba(155, 143, 191, 0.15) 0%, transparent 70%),
        radial-gradient(ellipse 60% 40% at 30% 70%, rgba(94, 196, 212, 0.1) 0%, transparent 60%);
    mix-blend-mode: screen;
}

/* Mountain Peak */
.mountain-peak {
    width: 60%;
    height: 70%;
    top: 5%;
    right: 10%;
}

.mountain-peak .gradient-layer:first-child {
    background: 
        conic-gradient(from 200deg at 50% 80%, var(--deep-twilight) 0deg, #2a1f5e 60deg, #1a1a4e 120deg, var(--near-black) 180deg, #1a1a4e 240deg, #2d1b4e 300deg, var(--deep-twilight) 360deg);
    clip-path: polygon(50% 5%, 15% 100%, 85% 100%);
}

.mountain-peak .layer-2 {
    background: linear-gradient(170deg, transparent 20%, rgba(0, 229, 255, 0.12) 50%, transparent 80%);
    mix-blend-mode: screen;
    clip-path: polygon(50% 5%, 15% 100%, 85% 100%);
}

/* Photo Fragments */
.photo-fragment {
    border-radius: 3px;
    box-shadow: 4px 6px 20px rgba(0, 0, 0, 0.5);
}

.photo-border {
    position: absolute;
    inset: 0;
    border: 3px solid rgba(232, 228, 220, 0.3);
    border-radius: 3px;
    pointer-events: none;
}

.fragment-1 {
    width: 220px;
    height: 280px;
    top: 15%;
    left: 8%;
    transform: rotate(-7deg);
}

.fragment-1 .gradient-layer:first-child {
    background: linear-gradient(135deg, #1a2a4e 0%, #2d4a6e 50%, #1a3a5e 100%);
}

.fragment-1 .layer-2 {
    background: 
        radial-gradient(circle at 60% 40%, rgba(0, 229, 255, 0.2) 0%, transparent 50%),
        linear-gradient(to bottom, transparent 60%, rgba(255, 153, 64, 0.15) 100%);
    mix-blend-mode: screen;
}

.fragment-2 {
    width: 180px;
    height: 240px;
    bottom: 20%;
    right: 12%;
    transform: rotate(4deg);
}

.fragment-2 .gradient-layer:first-child {
    background: linear-gradient(200deg, #2d1b4e 0%, #4a2060 50%, #1a1a4e 100%);
}

.fragment-2 .layer-2 {
    background: radial-gradient(circle at 40% 60%, rgba(255, 41, 111, 0.2) 0%, transparent 60%);
    mix-blend-mode: screen;
}

/* Ridge Landscape */
.ridge-landscape {
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
}

.ridge-landscape .gradient-layer:first-child {
    background: linear-gradient(175deg, var(--near-black) 0%, #0d1535 30%, #1a2a4e 60%, var(--deep-twilight) 100%);
}

.ridge-landscape .layer-2 {
    background: 
        linear-gradient(90deg, transparent 20%, rgba(255, 153, 64, 0.08) 50%, transparent 80%),
        radial-gradient(ellipse 100% 60% at 50% 100%, rgba(94, 196, 212, 0.06) 0%, transparent 70%);
    mix-blend-mode: screen;
}

.ridge-landscape .layer-3 {
    background: repeating-linear-gradient(
        0deg,
        transparent 0px,
        transparent 3px,
        rgba(232, 228, 220, 0.02) 3px,
        rgba(232, 228, 220, 0.02) 4px
    );
}

.fragment-3 {
    width: 200px;
    height: 260px;
    top: 10%;
    right: 15%;
    transform: rotate(3deg);
}

.fragment-3 .gradient-layer:first-child {
    background: linear-gradient(150deg, #1a3a5e 0%, #2d5a7e 40%, #1a4a6e 100%);
}

.fragment-3 .layer-2 {
    background: 
        radial-gradient(circle at 30% 70%, rgba(255, 153, 64, 0.25) 0%, transparent 50%),
        linear-gradient(to top, transparent 40%, rgba(0, 229, 255, 0.1) 100%);
    mix-blend-mode: screen;
}

.fragment-4 {
    width: 170px;
    height: 220px;
    bottom: 15%;
    left: 10%;
    transform: rotate(-5deg);
}

.fragment-4 .gradient-layer:first-child {
    background: linear-gradient(190deg, #2d1b4e 0%, #3d2b5e 60%, #1a1a4e 100%);
}

.fragment-4 .layer-2 {
    background: radial-gradient(circle at 70% 30%, rgba(94, 196, 212, 0.2) 0%, transparent 60%);
    mix-blend-mode: screen;
}

/* Summit Vista */
.summit-vista {
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
}

.summit-vista .gradient-layer:first-child {
    background: linear-gradient(180deg, var(--near-black) 0%, #0d0d35 25%, #1a1a5e 50%, #0d1535 75%, var(--near-black) 100%);
}

.summit-vista .layer-2 {
    background: 
        radial-gradient(ellipse 120% 80% at 50% 50%, rgba(0, 229, 255, 0.06) 0%, transparent 70%),
        radial-gradient(ellipse 80% 60% at 20% 60%, rgba(255, 41, 111, 0.05) 0%, transparent 60%);
    mix-blend-mode: screen;
}

.summit-vista .layer-3 {
    background: 
        radial-gradient(circle at 80% 30%, rgba(255, 153, 64, 0.08) 0%, transparent 40%),
        radial-gradient(circle at 20% 70%, rgba(155, 143, 191, 0.06) 0%, transparent 50%);
    mix-blend-mode: screen;
}

.summit-vista .layer-4 {
    background: conic-gradient(from 0deg at 50% 50%, transparent 0deg, rgba(0, 229, 255, 0.03) 90deg, transparent 180deg, rgba(255, 41, 111, 0.03) 270deg, transparent 360deg);
    mix-blend-mode: screen;
    animation: slowRotate 60s linear infinite;
}

@keyframes slowRotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* Panorama Strip */
.panorama-strip {
    display: flex;
    gap: 12px;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.pano-frame {
    position: relative;
    width: 160px;
    height: 200px;
    flex-shrink: 0;
    box-shadow: 3px 4px 15px rgba(0, 0, 0, 0.5);
}

.pano-1 .gradient-layer:first-child {
    background: linear-gradient(160deg, #1a2a4e 0%, #2d4a7e 100%);
}
.pano-1 .layer-2 {
    background: radial-gradient(circle at 50% 50%, rgba(0, 229, 255, 0.2) 0%, transparent 70%);
    mix-blend-mode: screen;
}

.pano-2 .gradient-layer:first-child {
    background: linear-gradient(140deg, #2d1b5e 0%, #4a3070 100%);
}
.pano-2 .layer-2 {
    background: radial-gradient(circle at 50% 50%, rgba(255, 41, 111, 0.2) 0%, transparent 70%);
    mix-blend-mode: screen;
}

.pano-3 .gradient-layer:first-child {
    background: linear-gradient(180deg, #1a3a5e 0%, #2d5a8e 100%);
}
.pano-3 .layer-2 {
    background: radial-gradient(circle at 50% 50%, rgba(255, 153, 64, 0.2) 0%, transparent 70%);
    mix-blend-mode: screen;
}

.pano-4 .gradient-layer:first-child {
    background: linear-gradient(150deg, #0d1535 0%, #2a2060 100%);
}
.pano-4 .layer-2 {
    background: radial-gradient(circle at 50% 50%, rgba(155, 143, 191, 0.25) 0%, transparent 70%);
    mix-blend-mode: screen;
}

/* Basecamp Landscape */
.basecamp-landscape {
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
}

.basecamp-landscape .gradient-layer:first-child {
    background: linear-gradient(170deg, var(--deep-twilight) 0%, #1a1a3e 40%, #0d1525 70%, var(--near-black) 100%);
}

.basecamp-landscape .layer-2 {
    background: 
        radial-gradient(ellipse 100% 50% at 50% 80%, rgba(255, 153, 64, 0.08) 0%, transparent 70%),
        linear-gradient(to top, rgba(94, 196, 212, 0.04) 0%, transparent 50%);
    mix-blend-mode: screen;
}

.basecamp-landscape .layer-3 {
    background: repeating-linear-gradient(
        0deg,
        transparent 0px,
        transparent 2px,
        rgba(232, 228, 220, 0.015) 2px,
        rgba(232, 228, 220, 0.015) 3px
    );
}

.fragment-5 {
    width: 240px;
    height: 300px;
    top: 15%;
    right: 10%;
    transform: rotate(2deg);
}

.fragment-5 .gradient-layer:first-child {
    background: linear-gradient(170deg, #1a2a3e 0%, #2d4a5e 50%, #1a3a4e 100%);
}

.fragment-5 .layer-2 {
    background: 
        radial-gradient(circle at 50% 40%, rgba(255, 153, 64, 0.2) 0%, transparent 50%),
        linear-gradient(to bottom, transparent 50%, rgba(0, 229, 255, 0.1) 100%);
    mix-blend-mode: screen;
}

/* ================================================
   TORN EDGES
   ================================================ */
.torn-edge {
    position: absolute;
    left: 0;
    right: 0;
    height: 60px;
    z-index: 5;
}

.torn-edge-top {
    top: -30px;
    background: linear-gradient(to bottom, var(--near-black), transparent);
    clip-path: polygon(
        0% 0%, 3% 45%, 7% 20%, 12% 55%, 18% 15%, 22% 50%, 28% 25%, 33% 60%, 38% 10%, 42% 45%, 
        48% 20%, 52% 55%, 57% 30%, 62% 50%, 67% 15%, 72% 55%, 77% 25%, 82% 45%, 87% 10%, 92% 50%, 
        97% 30%, 100% 0%
    );
}

.torn-edge-bottom {
    bottom: -30px;
    background: linear-gradient(to top, var(--near-black), transparent);
    clip-path: polygon(
        0% 100%, 5% 55%, 10% 80%, 15% 45%, 20% 75%, 25% 50%, 30% 85%, 35% 40%, 40% 70%, 45% 55%,
        50% 80%, 55% 45%, 60% 75%, 65% 50%, 70% 80%, 75% 40%, 80% 65%, 85% 50%, 90% 80%, 95% 55%, 
        100% 100%
    );
}

/* ================================================
   HANDWRITTEN LABELS
   ================================================ */
.handwritten-label {
    position: absolute;
    font-family: 'Alegreya', serif;
    font-style: italic;
    font-size: 0.85rem;
    color: rgba(232, 228, 220, 0.5);
    transform: rotate(-3deg);
    white-space: nowrap;
    letter-spacing: 0.05em;
}

.label-1 { top: 35%; right: 8%; transform: rotate(-5deg); }
.label-2 { bottom: 25%; left: 5%; transform: rotate(2deg); }
.label-3 { bottom: 20%; right: 15%; transform: rotate(-4deg); }
.label-4 { top: 40%; left: 8%; transform: rotate(3deg); }

/* ================================================
   NEON GLOWS
   ================================================ */
.neon-glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    pointer-events: none;
    opacity: 0.4;
    transition: opacity 0.5s ease;
}

.glow-cyan {
    width: 400px;
    height: 400px;
    background: var(--electric-cyan);
    top: 20%;
    right: -100px;
    opacity: 0.15;
}

.glow-pink {
    width: 350px;
    height: 350px;
    background: var(--hot-pink);
    bottom: 10%;
    left: -80px;
    opacity: 0.12;
}

.glow-amber {
    width: 300px;
    height: 300px;
    background: var(--amber);
    top: 30%;
    left: -60px;
    opacity: 0.1;
}

.glow-summit {
    bottom: 20%;
    right: -100px;
    opacity: 0.15;
}

.glow-summit-2 {
    top: 10%;
    left: -80px;
    opacity: 0.1;
}

.glow-basecamp {
    bottom: 30%;
    right: -50px;
    opacity: 0.12;
}

/* ================================================
   TYPOGRAPHY
   ================================================ */
.hero-title {
    text-align: center;
    margin-bottom: 1.5rem;
}

.hero-word {
    font-family: 'Zilla Slab', serif;
    font-weight: 700;
    font-size: clamp(72px, 15vw, 180px);
    letter-spacing: -0.02em;
    color: var(--warm-parchment);
    display: block;
    text-shadow: 
        0 0 40px rgba(0, 229, 255, 0.3),
        0 0 80px rgba(0, 229, 255, 0.15),
        0 0 120px rgba(255, 41, 111, 0.1);
    opacity: 0;
    transform: translateY(30px);
    animation: heroFadeIn 1.5s ease-out 0.3s forwards;
}

@keyframes heroFadeIn {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-subtitle {
    font-family: 'Alegreya', serif;
    font-style: italic;
    font-size: clamp(1rem, 2.5vw, 1.5rem);
    color: rgba(232, 228, 220, 0.7);
    text-align: center;
    max-width: 500px;
    margin: 0 auto 3rem;
    opacity: 0;
    animation: heroFadeIn 1.5s ease-out 0.8s forwards;
}

.hero-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 100%;
}

/* Scroll Indicator */
.scroll-indicator {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    opacity: 0;
    animation: heroFadeIn 1.5s ease-out 1.3s forwards;
}

.scroll-text {
    font-family: 'Inter', sans-serif;
    font-size: 0.7rem;
    font-weight: 300;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: rgba(232, 228, 220, 0.4);
}

.scroll-arrow {
    color: var(--electric-cyan);
    animation: bounceArrow 2s ease-in-out infinite;
}

@keyframes bounceArrow {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(8px); }
}

/* Section Titles */
.section-title {
    font-family: 'Zilla Slab', serif;
    font-weight: 700;
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    letter-spacing: -0.02em;
    color: var(--warm-parchment);
    margin-bottom: 2rem;
    text-shadow: 0 0 30px rgba(0, 229, 255, 0.2);
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

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

/* ================================================
   RIDGE CARDS
   ================================================ */
.ridge-content {
    max-width: 1000px;
    width: 100%;
    text-align: center;
}

.ridge-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.ridge-card {
    background: rgba(11, 11, 43, 0.7);
    border: 1px solid rgba(232, 228, 220, 0.1);
    border-radius: 4px;
    padding: 2.5rem 2rem;
    text-align: left;
    position: relative;
    overflow: hidden;
    transition: transform 0.4s ease, border-color 0.4s ease, box-shadow 0.4s ease;
    opacity: 0;
    transform: translateY(30px);
}

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

.ridge-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(0, 229, 255, 0.08) 0%, transparent 60%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.ridge-card:hover::before {
    opacity: 1;
}

.ridge-card:hover {
    border-color: rgba(0, 229, 255, 0.3);
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(0, 229, 255, 0.1);
}

.card-number {
    font-family: 'Inter', sans-serif;
    font-size: 0.7rem;
    font-weight: 500;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--electric-cyan);
    display: block;
    margin-bottom: 1rem;
}

.card-title {
    font-family: 'Zilla Slab', serif;
    font-weight: 600;
    font-size: 1.5rem;
    color: var(--warm-parchment);
    margin-bottom: 0.75rem;
}

.card-body {
    font-family: 'Alegreya', serif;
    font-size: 1.05rem;
    line-height: 1.7;
    color: rgba(232, 228, 220, 0.65);
}

/* ================================================
   SUMMIT CONTENT
   ================================================ */
.summit-content {
    max-width: 800px;
    width: 100%;
    text-align: center;
}

.summit-text {
    font-family: 'Alegreya', serif;
    font-size: 1.15rem;
    line-height: 1.8;
    color: rgba(232, 228, 220, 0.7);
    margin-bottom: 3rem;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

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

.summit-stats {
    display: flex;
    justify-content: center;
    gap: 4rem;
    flex-wrap: wrap;
}

.stat-item {
    text-align: center;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

.stat-number {
    font-family: 'Zilla Slab', serif;
    font-weight: 700;
    font-size: 3rem;
    color: var(--electric-cyan);
    display: block;
    text-shadow: 0 0 20px rgba(0, 229, 255, 0.3);
}

.stat-label {
    font-family: 'Inter', sans-serif;
    font-size: 0.7rem;
    font-weight: 300;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: rgba(232, 228, 220, 0.5);
    display: block;
    margin-top: 0.5rem;
}

/* ================================================
   BASECAMP CONTENT
   ================================================ */
.basecamp-content {
    max-width: 700px;
    width: 100%;
    text-align: center;
}

.basecamp-text {
    font-family: 'Alegreya', serif;
    font-size: 1.15rem;
    line-height: 1.8;
    color: rgba(232, 228, 220, 0.7);
    margin-bottom: 2.5rem;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

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

/* CTA Buttons */
.cta-group {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 3rem;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.8s ease 0.2s, transform 0.8s ease 0.2s;
}

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

.cta-button {
    font-family: 'Inter', sans-serif;
    font-size: 0.8rem;
    font-weight: 500;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    text-decoration: none;
    padding: 1rem 2.5rem;
    border-radius: 2px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.cta-primary {
    background: var(--electric-cyan);
    color: var(--near-black);
    box-shadow: 0 0 20px rgba(0, 229, 255, 0.2);
}

.cta-primary:hover {
    background: #33ebff;
    box-shadow: 0 0 40px rgba(0, 229, 255, 0.4);
    transform: translateY(-2px);
}

.cta-secondary {
    background: transparent;
    color: var(--warm-parchment);
    border: 1px solid rgba(232, 228, 220, 0.3);
}

.cta-secondary:hover {
    border-color: var(--amber);
    color: var(--amber);
    box-shadow: 0 0 20px rgba(255, 153, 64, 0.15);
    transform: translateY(-2px);
}

/* Signature */
.basecamp-signature {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    opacity: 0;
    transition: opacity 1s ease 0.5s;
}

.basecamp-signature.visible {
    opacity: 1;
}

.sig-mark {
    font-family: 'Zilla Slab', serif;
    font-weight: 700;
    font-size: 1.2rem;
    color: rgba(232, 228, 220, 0.4);
    letter-spacing: 0.05em;
}

.sig-year {
    font-family: 'Inter', sans-serif;
    font-size: 0.7rem;
    font-weight: 300;
    color: rgba(232, 228, 220, 0.25);
    letter-spacing: 0.2em;
}

/* ================================================
   CURSOR GLOW
   ================================================ */
#cursor-glow {
    position: fixed;
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(0, 229, 255, 0.08) 0%, transparent 70%);
    pointer-events: none;
    z-index: 9999;
    transform: translate(-50%, -50%);
    transition: width 0.3s ease, height 0.3s ease, opacity 0.3s ease;
    opacity: 0;
}

body:hover #cursor-glow {
    opacity: 1;
}

/* ================================================
   SCROLL PROGRESS
   ================================================ */
#scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    z-index: 1000;
    background: rgba(232, 228, 220, 0.05);
}

#progress-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--electric-cyan), var(--hot-pink), var(--amber));
    transition: width 0.1s linear;
}

/* ================================================
   ALTITUDE MARKERS
   ================================================ */
#altitude-markers {
    position: fixed;
    right: 2rem;
    top: 50%;
    transform: translateY(-50%);
    z-index: 100;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.altitude-mark {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    opacity: 0.3;
    transition: opacity 0.4s ease;
}

.altitude-mark.active {
    opacity: 1;
}

.alt-line {
    width: 20px;
    height: 1px;
    background: var(--warm-parchment);
    display: block;
    transition: width 0.3s ease, background 0.3s ease;
}

.altitude-mark.active .alt-line {
    width: 35px;
    background: var(--electric-cyan);
}

.alt-label {
    font-family: 'Inter', sans-serif;
    font-size: 0.6rem;
    font-weight: 300;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--warm-parchment);
    white-space: nowrap;
}

.altitude-mark.active .alt-label {
    color: var(--electric-cyan);
}

/* ================================================
   RESPONSIVE
   ================================================ */
@media (max-width: 768px) {
    .ridge-cards {
        grid-template-columns: 1fr;
    }
    
    .summit-stats {
        gap: 2rem;
    }
    
    .panorama-strip {
        flex-wrap: wrap;
        width: 90%;
    }
    
    .pano-frame {
        width: 120px;
        height: 150px;
    }
    
    #altitude-markers {
        right: 0.75rem;
    }
    
    .alt-label {
        font-size: 0.5rem;
    }
    
    .fragment-1, .fragment-2, .fragment-3, .fragment-4, .fragment-5 {
        width: 120px;
        height: 160px;
    }
    
    .depth-far {
        transform: translateZ(-1px) scale(2);
    }
    
    .depth-mid {
        transform: translateZ(-0.5px) scale(1.5);
    }
}

@media (max-width: 480px) {
    .cta-group {
        flex-direction: column;
        align-items: center;
    }
    
    .cta-button {
        width: 100%;
        max-width: 280px;
        text-align: center;
    }
    
    .summit-stats {
        flex-direction: column;
        gap: 1.5rem;
    }
}

/* Grain overlay for analog feel */
body::after {
    content: '';
    position: fixed;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.03'/%3E%3C/svg%3E");
    pointer-events: none;
    z-index: 9998;
    opacity: 0.5;
}