/* Stylesheet for Advanced Interactive Tech Stack Section */
:root {
    --card-w: 290px;
    --card-h: 240px;
    --wheel-radius: 360px;
}

@media (max-width: 768px) {
    :root {
        --card-w: 210px;
        --card-h: 190px;
        --wheel-radius: 210px;
    }
}

.advanced-techstack-wrap {
    position: relative;
    width: 100%;
    height: 400vh; /* Gives ample scroll distance for stages */
    background: #000000;
}

.advanced-techstack-sticky {
    position: sticky;
    top: 0;
    width: 100%;
    height: 100vh;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #000;
    perspective: 1200px;
    transform-style: preserve-3d;
}

/* Titles */
.adv-title-container {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
    pointer-events: none;
}

.adv-main-title {
    font-family: 'Syne', sans-serif;
    font-size: clamp(2.5rem, 6vw, 6rem);
    font-weight: 800;
    color: #ffffff;
    text-transform: uppercase;
    text-align: center;
    letter-spacing: -0.02em;
    opacity: 1;
    transform: translateZ(50px);
    transition: opacity 0.2s ease, transform 0.2s ease;
    text-shadow: 0 0 20px rgba(255, 255, 255, 0.1);
}

.adv-split-title-wrap {
    position: absolute;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 8%;
    box-sizing: border-box;
    opacity: 0;
    transform: translateZ(80px);
    transition: opacity 0.2s ease;
}

.adv-left-title, .adv-right-title {
    font-family: 'Syne', sans-serif;
    font-size: clamp(3rem, 8vw, 8rem);
    font-weight: 800;
    text-transform: uppercase;
    color: #ffffff;
    letter-spacing: -0.03em;
    text-shadow: 0 0 30px rgba(255, 255, 255, 0.15);
}

.adv-header-tag {
    position: absolute;
    top: 6%;
    font-family: 'Outfit', sans-serif;
    font-size: 14px;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--text-muted, #888);
    display: flex;
    align-items: center;
    gap: 8px;
    opacity: 0;
    transform: translateY(-20px);
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.adv-header-tag .dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: #00ffaa;
    box-shadow: 0 0 10px #00ffaa;
}

/* Graphics Container */
.adv-graphic-container {
    position: absolute;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    transform-style: preserve-3d;
    pointer-events: none;
    z-index: 5;
}

/* Phase 1: Tilted Neon Card */
.tilted-neon-card-wrap {
    position: absolute;
    transform-style: preserve-3d;
    transition: opacity 0.3s ease, transform 0.3s ease;
    opacity: 1;
}

.tilted-neon-card {
    position: relative;
    width: 380px;
    height: 240px;
    background: rgba(255, 255, 255, 0.02);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 2px solid transparent;
    background-image: linear-gradient(rgba(0, 0, 0, 0.9), rgba(0, 0, 0, 0.9)), linear-gradient(135deg, #00ffaa 0%, #00e5ff 100%);
    background-origin: border-box;
    background-clip: padding-box, border-box;
    border-radius: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    transform: rotateX(25deg) rotateY(-20deg) rotateZ(8deg);
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.8), 0 0 50px rgba(0, 255, 170, 0.1);
    transition: transform 0.2s cubic-bezier(0.25, 0.8, 0.25, 1);
}

@media (max-width: 768px) {
    .tilted-neon-card {
        width: 290px;
        height: 180px;
    }
}

.tilted-neon-card::after {
    content: '';
    position: absolute;
    inset: -2px;
    border-radius: 28px;
    background: linear-gradient(135deg, #00ffaa, #00e5ff);
    z-index: -1;
    opacity: 0.4;
    filter: blur(15px);
}

/* Phase 2: Perspective Tunnel */
.tunnel-container {
    position: absolute;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    perspective: 800px;
    transform-style: preserve-3d;
    opacity: 0;
    transition: opacity 0.4s ease;
}

.tunnel-frame {
    position: absolute;
    width: 500px;
    height: 340px;
    border: 2px solid transparent;
    background-image: linear-gradient(rgba(0, 0, 0, 0.92), rgba(0, 0, 0, 0.92)), linear-gradient(135deg, #00ffaa, #00e5ff);
    background-origin: border-box;
    background-clip: padding-box, border-box;
    border-radius: 24px;
    box-shadow: 0 0 35px rgba(0, 255, 170, 0.15), inset 0 0 25px rgba(0, 229, 255, 0.1);
    transform-style: preserve-3d;
    opacity: 0;
}

@media (max-width: 768px) {
    .tunnel-frame {
        width: 320px;
        height: 220px;
    }
}

/* Phase 3: 3D Chakri (Rotating Wheel) */
.chakri-container {
    position: absolute;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    perspective: 1400px;
    transform-style: preserve-3d;
    opacity: 0;
    transition: opacity 0.5s ease, transform 0.5s ease;
    transform: scale(0.8) translateZ(-150px);
}

.chakri-wheel {
    position: relative;
    width: 0;
    height: 0;
    transform-style: preserve-3d;
    transition: transform 0.1s ease-out;
}

.chakri-card {
    position: absolute;
    left: calc(var(--card-w) / -2);
    top: calc(var(--card-h) / -2);
    width: var(--card-w);
    height: var(--card-h);
    background: rgba(10, 10, 10, 0.7);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1.5px solid rgba(255, 255, 255, 0.05);
    border-radius: 24px;
    padding: 24px;
    box-sizing: border-box;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.6);
    transform-style: preserve-3d;
    backface-visibility: visible;
    transition: border-color 0.4s ease, box-shadow 0.4s ease, background 0.4s ease, transform 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    pointer-events: auto; /* Allow clicking/hovering cards */
    cursor: pointer;
}

@media (max-width: 768px) {
    .chakri-card {
        padding: 16px;
    }
}

.chakri-card:hover {
    border-color: rgba(0, 255, 170, 0.4);
    box-shadow: 0 0 25px rgba(0, 255, 170, 0.15), 0 15px 40px rgba(0, 0, 0, 0.7);
    transform: scale(1.03) rotateY(var(--hover-rot-y, 0deg));
}

.chakri-card.active {
    border-color: #00ffaa;
    background: rgba(16, 16, 16, 0.9);
    box-shadow: 0 0 40px rgba(0, 255, 170, 0.25), 0 20px 50px rgba(0, 0, 0, 0.8);
}

.chakri-card-header {
    display: flex;
    align-items: center;
    gap: 16px;
}

@media (max-width: 768px) {
    .chakri-card-header {
        gap: 10px;
    }
}

.chakri-icon-wrap {
    width: 46px;
    height: 46px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: inset 0 0 10px rgba(255, 255, 255, 0.02);
}

@media (max-width: 768px) {
    .chakri-icon-wrap {
        width: 36px;
        height: 36px;
        border-radius: 8px;
    }
    .chakri-icon-wrap svg {
        width: 20px;
        height: 20px;
    }
}

.chakri-name-wrap {
    display: flex;
    flex-direction: column;
}

.chakri-name-wrap h3 {
    font-family: 'Syne', sans-serif;
    font-size: 18px;
    font-weight: 700;
    color: #ffffff;
    margin: 0;
}

.chakri-name-wrap span {
    font-family: 'Outfit', sans-serif;
    font-size: 11px;
    color: #00ffaa;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-top: 2px;
}

@media (max-width: 768px) {
    .chakri-name-wrap h3 {
        font-size: 15px;
    }
    .chakri-name-wrap span {
        font-size: 9px;
    }
}

.chakri-desc {
    font-family: 'Outfit', sans-serif;
    font-size: 13px;
    line-height: 1.5;
    color: var(--text-muted, #999);
    margin: 12px 0;
    font-weight: 300;
}

@media (max-width: 768px) {
    .chakri-desc {
        font-size: 11px;
        line-height: 1.4;
        margin: 8px 0;
    }
}

.chakri-level {
    margin-top: auto;
}

.chakri-level-label {
    display: flex;
    justify-content: space-between;
    font-family: 'Outfit', sans-serif;
    font-size: 11px;
    color: var(--text-muted, #777);
    margin-bottom: 6px;
}

.chakri-progress-bar {
    width: 100%;
    height: 4px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 2px;
    overflow: hidden;
}

.chakri-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #00ffaa, #00e5ff);
    width: 0%;
    border-radius: 2px;
    transition: width 0.8s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.chakri-card.active .chakri-progress-fill {
    /* Fill animates when card is active */
    width: var(--progress-pct);
}

/* Nav cues/indicators */
.chakri-nav-indicators {
    position: absolute;
    bottom: 6%;
    display: flex;
    gap: 8px;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.3s ease, transform 0.3s ease;
    z-index: 12;
}

.chakri-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    transition: all 0.3s ease;
}

.chakri-dot.active {
    background: #00ffaa;
    box-shadow: 0 0 10px #00ffaa;
    width: 24px;
    border-radius: 4px;
}