/* ============================================
   concengine.com - Pastoral-Romantic Generative
   Horizontal Scroll Experience
   ============================================ */

/* --- CSS Custom Properties --- */
:root {
    --charred-umber: #1A1209;
    --chapel-indigo: #0E0B16;
    --parchment-glow: #F5E6D0;
    --tallow-gold: #D4A574;
    --burnished-copper: #C49A6C;
    --inkwell-brown: #2B1F14;
    --autumn-umber: #7A5C3B;
    --beeswax-amber: #8B6914;
    --harvest-linen: #F0E4D1;
    --wick-ash: #8B8B8B;

    --font-display: 'Libre Baskerville', serif;
    --font-body: 'Source Serif 4', serif;
    --font-accent: 'Caveat', cursive;
    --font-mono: 'DM Mono', monospace;
}

/* --- Reset & Base --- */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    height: 100%;
    overflow: hidden;
    background: var(--charred-umber);
    color: var(--inkwell-brown);
    font-family: var(--font-body);
    font-optical-sizing: auto;
}

/* --- Horizontal Canvas --- */
#horizontal-canvas {
    display: flex;
    flex-direction: row;
    flex-wrap: nowrap;
    height: 100vh;
    width: max-content;
    will-change: transform;
}

/* --- Chamber Base --- */
.chamber {
    height: 100vh;
    position: relative;
    overflow: hidden;
    flex-shrink: 0;
}

.chamber-content {
    width: 100%;
    height: 100%;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    will-change: filter;
}

/* --- Transition Zones --- */
.transition-zone {
    height: 100vh;
    min-width: 50vw;
    flex-shrink: 0;
    position: relative;
}

.transition-1-2 {
    background: linear-gradient(to right, var(--charred-umber), transparent 20%, transparent 80%, var(--inkwell-brown));
}

.transition-2-3 {
    background: linear-gradient(to right, var(--inkwell-brown), transparent 20%, transparent 80%, var(--inkwell-brown));
    background-image:
        linear-gradient(to right, var(--inkwell-brown), #2B1F1480 30%, #7A5C3B10 50%, #2B1F1480 70%, var(--inkwell-brown));
}

.transition-3-4 {
    background: linear-gradient(to right, var(--inkwell-brown), transparent 20%, transparent 80%, var(--charred-umber));
}

.transition-4-5 {
    background: linear-gradient(to right, var(--charred-umber), transparent 20%, transparent 80%, var(--harvest-linen));
}

.transition-5-6 {
    background: linear-gradient(to right, var(--harvest-linen), transparent 20%, transparent 80%, var(--chapel-indigo));
}

.transition-6-7 {
    background: linear-gradient(to right, var(--chapel-indigo), transparent 20%, transparent 80%, var(--charred-umber));
}

/* ============================================
   Chamber 1: The Threshold (150vw)
   ============================================ */
.chamber-1 {
    min-width: 150vw;
    background: var(--charred-umber);
    background-image:
        radial-gradient(ellipse at 20% 50%, #D4A57410 0%, transparent 50%),
        radial-gradient(ellipse at 80% 30%, #8B691408 0%, transparent 40%),
        radial-gradient(ellipse at 50% 70%, #D4A57406 0%, transparent 60%);
}

.candle-field {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.candle-flame-element {
    position: absolute;
    border-radius: 50% 50% 50% 50% / 60% 60% 40% 40%;
    background: radial-gradient(ellipse at 50% 80%, var(--tallow-gold), var(--beeswax-amber) 40%, var(--charred-umber) 80%, transparent 100%);
    mix-blend-mode: screen;
    will-change: transform, opacity, border-radius;
}

.candle-flame-element::before {
    content: '';
    position: absolute;
    inset: -50%;
    border-radius: 50%;
    background: radial-gradient(ellipse at 50% 60%, #D4A57430, transparent 70%);
    filter: blur(20px);
    mix-blend-mode: screen;
}

.candle-flame-element::after {
    content: '';
    position: absolute;
    inset: 20%;
    border-radius: 50% 50% 50% 50% / 60% 60% 40% 40%;
    background: radial-gradient(ellipse at 50% 70%, #D4A574cc, #8B6914aa 50%, transparent 100%);
}

.domain-title {
    font-family: var(--font-display);
    font-style: italic;
    font-weight: 400;
    font-size: clamp(6rem, 12vw, 14rem);
    letter-spacing: 0.04em;
    color: var(--tallow-gold);
    position: relative;
    z-index: 10;
    text-shadow:
        0 0 40px #D4A57440,
        0 0 80px #D4A57420,
        0 0 120px #8B691410;
    margin-left: 30vw;
    /* Blur mask effect - center sharp, edges blurred */
    -webkit-mask-image: linear-gradient(
        to right,
        rgba(0,0,0,0.15) 0%,
        rgba(0,0,0,0.4) 20%,
        rgba(0,0,0,1) 35%,
        rgba(0,0,0,1) 65%,
        rgba(0,0,0,0.4) 80%,
        rgba(0,0,0,0.15) 100%
    );
    mask-image: linear-gradient(
        to right,
        rgba(0,0,0,0.15) 0%,
        rgba(0,0,0,0.4) 20%,
        rgba(0,0,0,1) 35%,
        rgba(0,0,0,1) 65%,
        rgba(0,0,0,0.4) 80%,
        rgba(0,0,0,0.15) 100%
    );
    filter: blur(0.5px);
}

/* ============================================
   Chamber 2: The Garden (200vw)
   ============================================ */
.chamber-2 {
    min-width: 200vw;
    background: var(--inkwell-brown);
    background-image:
        radial-gradient(ellipse at 30% 40%, #7A5C3B15 0%, transparent 50%),
        radial-gradient(ellipse at 70% 60%, #C49A6C10 0%, transparent 40%);
}

.garden-region {
    position: absolute;
}

.region-lissajous {
    top: 10%;
    left: 5%;
    width: 40%;
    height: 60%;
    opacity: 0.8;
}

.lissajous-svg {
    width: 100%;
    height: 100%;
}

.lissajous-path {
    stroke-dasharray: 2000;
    stroke-dashoffset: 2000;
    transition: stroke-dashoffset 3s ease-in-out;
}

.lissajous-path.animate {
    stroke-dashoffset: 0;
}

.region-phyllotaxis {
    top: 15%;
    left: 35%;
    width: 35%;
    height: 70%;
}

.phyllotaxis-dot {
    position: absolute;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--burnished-copper);
    opacity: 0.7;
    will-change: transform;
}

.region-flame {
    top: 20%;
    right: 5%;
    width: 25%;
    height: 60%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 40px;
}

.garden-flame {
    width: 40px;
    height: 70px;
    border-radius: 50% 50% 50% 50% / 60% 60% 40% 40%;
    background: radial-gradient(ellipse at 50% 80%, var(--tallow-gold), var(--beeswax-amber) 40%, var(--charred-umber) 80%, transparent 100%);
    animation: flameFlicker 1.1s ease-in-out infinite alternate;
    mix-blend-mode: screen;
    box-shadow: 0 0 60px 30px #D4A57430, 0 0 30px 15px #8B691440;
}

.garden-flame-2 {
    width: 30px;
    height: 55px;
    animation-duration: 0.9s;
}

.garden-flame-3 {
    width: 25px;
    height: 45px;
    animation-duration: 1.3s;
}

.garden-text {
    position: absolute;
    bottom: 12%;
    left: 50%;
    transform: translateX(-50%);
    white-space: nowrap;
}

/* ============================================
   Chamber 3: The Library (250vw)
   ============================================ */
.chamber-3 {
    min-width: 250vw;
    background: var(--inkwell-brown);
    background-image: radial-gradient(ellipse at 50% 50%, #7A5C3B0a 0%, transparent 70%);
}

.library-content {
    align-items: stretch;
    padding: 0 5vw;
}

.page-wrapper {
    display: flex;
    flex-direction: row;
    align-items: center;
    height: 100%;
    gap: 0;
}

.library-page {
    min-width: 30vw;
    max-width: 30vw;
    height: 85vh;
    background: var(--parchment-glow);
    padding: 4rem 3rem;
    position: relative;
    display: flex;
    align-items: center;
    /* Parchment grain */
    background-image:
        repeating-conic-gradient(#2B1F1405 0% 25%, transparent 0% 50%) 0 0 / 4px 4px,
        repeating-conic-gradient(#2B1F1403 0% 25%, transparent 0% 50%) 2px 2px / 4px 4px;
    box-shadow: 2px 4px 20px #1A120930;
}

.library-page.page-top {
    align-self: flex-start;
    margin-top: 5vh;
}

.library-page.page-bottom {
    align-self: flex-end;
    margin-bottom: 5vh;
}

.library-page .body-text {
    font-family: var(--font-body);
    font-size: clamp(1rem, 1.8vw, 1.25rem);
    line-height: 1.75;
    color: var(--inkwell-brown);
    font-optical-sizing: auto;
}

.vine-connector {
    min-width: 60px;
    max-width: 60px;
    height: 70vh;
    align-self: center;
    position: relative;
}

.vine-connector svg {
    width: 100%;
    height: 100%;
}

.vine-path {
    stroke-dasharray: 1200;
    stroke-dashoffset: 1200;
    transition: stroke-dashoffset 2s ease-in-out;
}

.vine-path.growing {
    stroke-dashoffset: 0;
}

.vine-leaf {
    opacity: 0;
    transition: opacity 0.8s ease-in-out 1.5s;
}

.vine-path.growing ~ .vine-leaf {
    opacity: 0.6;
}

/* ============================================
   Chamber 4: The Hearth (150vw)
   ============================================ */
.chamber-4 {
    min-width: 150vw;
    background: #1A1209;
    background-image:
        radial-gradient(ellipse at 50% 50%, #D4A57408 0%, transparent 60%),
        radial-gradient(ellipse at 50% 80%, #8B691405 0%, transparent 40%);
}

.hearth-content {
    flex-direction: column;
}

.hearth-flame {
    position: relative;
    width: 200px;
    height: 60vh;
    display: flex;
    align-items: flex-end;
    justify-content: center;
}

.flame-layer {
    position: absolute;
    bottom: 10%;
    left: 50%;
    transform: translateX(-50%);
    border-radius: 50% 50% 50% 50% / 60% 60% 40% 40%;
}

.flame-outer {
    width: 180px;
    height: 300px;
    background: radial-gradient(ellipse at 50% 80%, #D4A57420, transparent 70%);
    filter: blur(20px);
    animation: flameFlicker 1.4s ease-in-out infinite alternate;
    mix-blend-mode: screen;
}

.flame-mid {
    width: 120px;
    height: 240px;
    background: radial-gradient(ellipse at 50% 75%, #D4A57460, #8B691430 50%, transparent 100%);
    filter: blur(8px);
    animation: flameFlicker 1.1s ease-in-out infinite alternate;
    mix-blend-mode: screen;
}

.flame-inner {
    width: 80px;
    height: 180px;
    background: radial-gradient(ellipse at 50% 70%, var(--tallow-gold), var(--beeswax-amber) 50%, transparent 100%);
    filter: blur(2px);
    animation: flameFlicker 0.9s ease-in-out infinite alternate;
    mix-blend-mode: screen;
    box-shadow: 0 0 60px 30px #D4A57430, 0 0 30px 15px #8B691440;
}

.flame-core {
    width: 40px;
    height: 100px;
    background: radial-gradient(ellipse at 50% 70%, #F5E6D0, var(--tallow-gold) 50%, transparent 100%);
    filter: blur(1px);
    animation: flameFlicker 0.8s ease-in-out infinite alternate;
    mix-blend-mode: screen;
}

.flame-glow {
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 400px;
    height: 400px;
    border-radius: 50%;
    background: radial-gradient(ellipse at 50% 50%, #D4A57415, #8B691408 40%, transparent 70%);
    pointer-events: none;
    animation: glowPulse 3s ease-in-out infinite alternate;
}

.orbiting-text {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.orbit-word {
    position: absolute;
    font-family: var(--font-body);
    font-size: clamp(1rem, 1.8vw, 1.25rem);
    color: var(--tallow-gold);
    text-shadow: 0 0 30px #D4A57440;
    will-change: transform;
    white-space: nowrap;
}

/* ============================================
   Chamber 5: The Field (200vw)
   ============================================ */
.chamber-5 {
    min-width: 200vw;
    background: var(--harvest-linen);
    background-image:
        radial-gradient(ellipse at 30% 30%, #D4A57410 0%, transparent 50%),
        radial-gradient(ellipse at 70% 70%, #F5E6D020 0%, transparent 40%);
}

.field-content {
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
}

.grass-field {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 40%;
    overflow: hidden;
    pointer-events: none;
}

.grass-stalk {
    position: absolute;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to top, var(--autumn-umber), var(--burnished-copper), transparent);
    transform-origin: bottom center;
    will-change: transform;
}

.torn-paper {
    position: absolute;
    padding: 2rem 2.5rem;
    background: var(--parchment-glow);
    box-shadow: 2px 3px 15px #1A120920;
    z-index: 5;
}

.torn-paper-1 {
    top: 12%;
    left: 15%;
    max-width: 30vw;
    transform: rotate(-2deg);
    clip-path: polygon(2% 5%, 95% 0%, 100% 3%, 98% 92%, 94% 100%, 5% 97%, 0% 95%, 1% 8%);
}

.torn-paper-2 {
    top: 25%;
    left: 45%;
    max-width: 35vw;
    transform: rotate(1.5deg);
    clip-path: polygon(0% 2%, 97% 0%, 100% 5%, 99% 90%, 95% 100%, 3% 98%, 0% 93%, 2% 7%);
}

.torn-paper-3 {
    top: 8%;
    left: 72%;
    max-width: 28vw;
    transform: rotate(-1deg);
    clip-path: polygon(3% 0%, 100% 3%, 98% 95%, 93% 100%, 0% 97%, 2% 8%);
}

.floating-collage {
    position: absolute;
    border-radius: 2px;
    opacity: 0.2;
}

.collage-1 {
    width: 15vw;
    height: 20vh;
    top: 55%;
    left: 20%;
    background: linear-gradient(135deg, var(--tallow-gold), var(--harvest-linen));
    transform: rotate(3deg);
    clip-path: polygon(5% 0%, 100% 8%, 95% 100%, 0% 92%);
}

.collage-2 {
    width: 12vw;
    height: 15vh;
    top: 48%;
    left: 55%;
    background: linear-gradient(45deg, var(--burnished-copper), var(--parchment-glow));
    transform: rotate(-4deg);
    clip-path: polygon(0% 5%, 95% 0%, 100% 95%, 3% 100%);
}

.collage-3 {
    width: 10vw;
    height: 18vh;
    top: 52%;
    left: 80%;
    background: linear-gradient(200deg, var(--autumn-umber), var(--harvest-linen));
    transform: rotate(2deg);
    clip-path: polygon(8% 0%, 100% 3%, 92% 100%, 0% 95%);
}

/* ============================================
   Chamber 6: The Observatory (200vw)
   ============================================ */
.chamber-6 {
    min-width: 200vw;
    background: var(--chapel-indigo);
    background-image:
        radial-gradient(ellipse at 40% 50%, #D4A57406 0%, transparent 50%),
        radial-gradient(ellipse at 70% 40%, #0E0B1600 0%, transparent 30%);
}

.observatory-content {
    flex-direction: column;
    gap: 4rem;
}

.ember-field {
    position: absolute;
    inset: 0;
    pointer-events: none;
    overflow: hidden;
}

.ember-particle {
    position: absolute;
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: var(--tallow-gold);
    opacity: 0;
    will-change: transform, opacity;
}

.observatory-text {
    font-family: var(--font-display);
    font-size: clamp(1.2rem, 2.5vw, 2rem);
    color: var(--tallow-gold);
    letter-spacing: 0.08em;
    text-shadow: 0 0 30px #D4A57440;
    text-align: center;
    max-width: 50vw;
    position: relative;
    z-index: 5;
    line-height: 1.8;
}

.observatory-text-2 {
    font-size: clamp(1rem, 2vw, 1.5rem);
    opacity: 0.7;
}

/* ============================================
   Chamber 7: The Return (100vw)
   ============================================ */
.chamber-7 {
    min-width: 100vw;
    background: var(--charred-umber);
    background-image:
        radial-gradient(ellipse at 50% 50%, #8B8B8B08 0%, transparent 50%);
}

.return-content {
    flex-direction: column;
}

.smoke-field {
    position: absolute;
    inset: 0;
    pointer-events: none;
    overflow: hidden;
}

.smoke-wisp {
    position: absolute;
    bottom: 40%;
    width: 8px;
    height: 60px;
    border-radius: 50% 50% 0 0;
    background: var(--wick-ash);
    filter: blur(8px);
    opacity: 0;
    will-change: transform, opacity;
}

.domain-title-return {
    color: var(--wick-ash);
    text-shadow:
        0 0 40px #8B8B8B30,
        0 0 80px #8B8B8B10;
    filter: blur(8px);
    transition: filter 2s ease-out;
    margin-left: 0;
    -webkit-mask-image: none;
    mask-image: none;
}

.domain-title-return.sharpening {
    filter: blur(0.5px);
}

/* ============================================
   Animations
   ============================================ */
@keyframes flameFlicker {
    0% {
        transform: translateX(-50%) scaleX(1) scaleY(1);
        opacity: 0.85;
        border-radius: 50% 50% 50% 50% / 60% 60% 40% 40%;
    }
    25% {
        transform: translateX(-52%) scaleX(0.95) scaleY(1.04);
        opacity: 0.9;
    }
    50% {
        transform: translateX(-48%) scaleX(1.03) scaleY(0.97);
        opacity: 0.8;
        border-radius: 48% 52% 48% 52% / 58% 62% 38% 42%;
    }
    75% {
        transform: translateX(-51%) scaleX(0.98) scaleY(1.02);
        opacity: 0.95;
    }
    100% {
        transform: translateX(-50%) scaleX(1.02) scaleY(0.98);
        opacity: 0.88;
        border-radius: 52% 48% 52% 48% / 62% 58% 42% 38%;
    }
}

@keyframes candleFloat {
    0%, 100% {
        transform: translateY(0) scale(1);
        opacity: var(--flame-opacity, 0.7);
    }
    50% {
        transform: translateY(-5px) scale(1.05);
        opacity: calc(var(--flame-opacity, 0.7) * 1.1);
    }
}

@keyframes emberRise {
    0% {
        transform: translateY(0) translateX(0);
        opacity: 0;
    }
    10% {
        opacity: 0.3;
    }
    90% {
        opacity: 0.15;
    }
    100% {
        transform: translateY(var(--ember-travel, -400px)) translateX(var(--ember-sway, 20px));
        opacity: 0;
    }
}

@keyframes smokeRise {
    0% {
        transform: translateY(0) scaleX(1) rotate(0deg);
        opacity: 0.35;
    }
    50% {
        transform: translateY(-50px) scaleX(1.3) rotate(8deg);
        opacity: 0.2;
    }
    100% {
        transform: translateY(-100px) scaleX(1.8) rotate(15deg);
        opacity: 0;
    }
}

@keyframes grassSway {
    0%, 100% {
        transform: rotate(var(--sway-start, -3deg));
    }
    50% {
        transform: rotate(var(--sway-end, 3deg));
    }
}

@keyframes glowPulse {
    0% {
        opacity: 0.6;
        transform: translateX(-50%) scale(1);
    }
    100% {
        opacity: 1;
        transform: translateX(-50%) scale(1.08);
    }
}

/* ============================================
   Progress Bar & Navigation
   ============================================ */
.progress-container {
    position: fixed;
    bottom: 3%;
    left: 5%;
    right: 5%;
    height: 2px;
    background: transparent;
    z-index: 100;
    display: flex;
    align-items: center;
}

.progress-bar {
    height: 100%;
    background: var(--burnished-copper);
    border-radius: 1px;
    width: 0%;
    transition: width 0.3s ease-out;
    box-shadow: 0 0 8px #C49A6C40;
}

.progress-indicator {
    position: absolute;
    right: -3rem;
    top: 50%;
    transform: translateY(-50%);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--burnished-copper);
    opacity: 0.6;
    white-space: nowrap;
}

/* Navigation Arrows */
.nav-arrow {
    position: fixed;
    top: 50%;
    transform: translateY(-50%);
    z-index: 100;
    cursor: pointer;
    opacity: 0;
    transition: opacity 0.5s ease;
    padding: 1rem;
}

.nav-arrow:hover {
    opacity: 1;
}

.nav-arrow-left {
    left: 1rem;
}

.nav-arrow-right {
    right: 1rem;
}

.nav-arrow svg {
    opacity: 0.4;
    transition: opacity 0.3s ease;
}

.nav-arrow:hover svg {
    opacity: 0.8;
}

body:hover .nav-arrow {
    opacity: 0.6;
}

/* ============================================
   Typography Utilities
   ============================================ */
.caveat-text {
    font-family: var(--font-accent);
    font-weight: 400;
    font-size: clamp(1.1rem, 2vw, 1.6rem);
    color: var(--autumn-umber);
    line-height: 1.6;
}

.body-text {
    font-family: var(--font-body);
    font-weight: 400;
    font-size: clamp(1rem, 1.8vw, 1.25rem);
    line-height: 1.75;
    color: var(--inkwell-brown);
    font-optical-sizing: auto;
}

/* ============================================
   Blur-Focus System (base states)
   ============================================ */
.chamber .blur-target {
    will-change: transform, filter;
    transition: filter 0.3s ease-out;
}