/* =============================================
   XANADU.QUEST - Opulent Dreamscape Styles
   ============================================= */

/* --- CSS Custom Properties --- */
:root {
    /* Color Palette */
    --obsidian-depth: #0B0E1A;
    --twilight-indigo: #1A1440;
    --kublas-gold: #C8A45E;
    --sacred-river: #2E8B8B;
    --alabaster-mist: #E8E0D4;
    --moonstone-white: #F5F0EB;
    --incense-ember: #A0522D;
    --cavern-violet: #4A2F6B;
    --pleasure-dome-rose: #8B4060;

    /* Dynamic background properties (updated by JS) */
    --bg-hue: 260;
    --bg-saturation: 45%;
    --bg-lightness: 8%;
    --scroll-progress: 0;

    /* Typography */
    --font-display: 'Cormorant Garamond', 'Georgia', serif;
    --font-body: 'Crimson Pro', 'Georgia', serif;
    --font-accent: 'Cinzel Decorative', 'Georgia', serif;
}

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

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    background-color: var(--obsidian-depth);
    color: var(--alabaster-mist);
    font-family: var(--font-body);
    font-size: clamp(1rem, 1.4vw, 1.25rem);
    font-weight: 400;
    line-height: 1.72;
    letter-spacing: 0.01em;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* --- Background Layer (z:0) --- */
#bg-layer {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    background: linear-gradient(
        180deg,
        hsl(var(--bg-hue), var(--bg-saturation), var(--bg-lightness)) 0%,
        hsl(calc(var(--bg-hue) - 10), calc(var(--bg-saturation) - 5%), calc(var(--bg-lightness) + 2%)) 50%,
        hsl(calc(var(--bg-hue) - 20), calc(var(--bg-saturation) - 10%), calc(var(--bg-lightness) + 4%)) 100%
    );
    will-change: background;
    pointer-events: none;
}

/* --- Particle Canvas --- */
#particle-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 10;
    pointer-events: none;
}

/* --- Compass Rose Navigation --- */
#compass-nav {
    position: fixed;
    top: 24px;
    right: 24px;
    z-index: 100;
    cursor: pointer;
}

#compass-rose {
    animation: spin 90s linear infinite;
    transition: transform 0.4s ease, filter 0.4s ease;
    filter: drop-shadow(0 0 4px rgba(200, 164, 94, 0.2));
}

#compass-nav:hover #compass-rose {
    transform: scale(1.15);
}

#compass-nav:hover #compass-rose line {
    stroke: var(--kublas-gold);
    transition: stroke 0.4s ease;
}

#compass-nav:hover #compass-rose polygon {
    stroke: var(--kublas-gold);
    transition: stroke 0.4s ease;
}

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

#compass-menu {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 280px;
    height: 280px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(11, 14, 26, 0.95) 0%, rgba(26, 20, 64, 0.9) 100%);
    border: 1px solid rgba(200, 164, 94, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 1;
    transition: opacity 0.4s ease, transform 0.4s ease;
}

#compass-menu.hidden {
    opacity: 0;
    pointer-events: none;
    transform: translate(-50%, -50%) scale(0.3);
}

.compass-link {
    position: absolute;
    color: var(--moonstone-white);
    font-family: var(--font-accent);
    font-size: 0.65rem;
    text-decoration: none;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    transition: color 0.3s ease, opacity 0.3s ease;
    opacity: 0;
    white-space: nowrap;
}

#compass-menu:not(.hidden) .compass-link {
    opacity: 1;
}

.compass-link:hover {
    color: var(--kublas-gold);
}

/* Position links in a circle */
.compass-link[data-index="0"] {
    top: 15px; left: 50%; transform: translateX(-50%);
    transition-delay: 0s;
}
.compass-link[data-index="1"] {
    top: 50%; right: 10px; transform: translateY(-50%);
    transition-delay: 0.08s;
}
.compass-link[data-index="2"] {
    bottom: 15px; left: 50%; transform: translateX(-50%);
    transition-delay: 0.16s;
}
.compass-link[data-index="3"] {
    top: 50%; left: 10px; transform: translateY(-50%);
    transition-delay: 0.24s;
}
.compass-link[data-index="4"] {
    top: 70%; right: 15px;
    transition-delay: 0.32s;
}

/* --- Chambers --- */
.chamber {
    position: relative;
    min-height: 120vh;
    z-index: 1;
    overflow: hidden;
}

.chamber-content {
    position: relative;
    min-height: 120vh;
    display: flex;
    align-items: center;
    padding: 8vh 6vw;
}

/* --- Architectural Silhouettes (Middle Layer z:1) --- */
.arch-silhouette {
    position: absolute;
    top: 0;
    width: 55%;
    height: 100%;
    z-index: 1;
    will-change: transform;
    pointer-events: none;
    opacity: 0;
    transition: opacity 1.5s ease;
}

.arch-silhouette.visible {
    opacity: 1;
}

.silhouette-left {
    left: -5%;
}

.silhouette-right {
    right: -5%;
}

.silhouette-center {
    left: 50%;
    transform: translateX(-50%);
    width: 80%;
}

.silhouette-svg {
    width: 100%;
    height: 100%;
    opacity: 0.85;
    filter: drop-shadow(inset 0 0 2px var(--cavern-violet));
}

/* Hover glow on silhouettes */
.silhouette-svg path,
.silhouette-svg rect,
.silhouette-svg ellipse {
    transition: fill 0.6s ease;
}

/* --- Chamber Text (Foreground z:2) --- */
.chamber-text {
    position: relative;
    z-index: 5;
    max-width: 580px;
}

/* Chamber 1 - The Threshold */
.threshold-text {
    padding-top: 15vh;
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(4rem, 12vw, 9rem);
    font-weight: 600;
    color: var(--moonstone-white);
    letter-spacing: 0.06em;
    line-height: 1.05;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 1.2s cubic-bezier(0.25, 0.1, 0.25, 1) 0.3s forwards;
    text-shadow: 0 0 60px rgba(74, 47, 107, 0.4), 0 0 120px rgba(200, 164, 94, 0.1);
}

.epigraph {
    font-family: var(--font-body);
    font-weight: 300;
    font-size: clamp(1rem, 1.6vw, 1.3rem);
    color: var(--alabaster-mist);
    margin-top: 2rem;
    max-width: 480px;
    opacity: 0;
    transform: translateY(15px);
    animation: fadeInUp 1.2s cubic-bezier(0.25, 0.1, 0.25, 1) 0.8s forwards;
    font-style: italic;
    line-height: 1.8;
}

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

/* Chamber 2 - The Gardens (text on right) */
#chamber-2 .chamber-content {
    justify-content: flex-end;
}

.gardens-text {
    text-align: left;
}

/* Chamber 3 - The Caverns (text on left) */
#chamber-3 .chamber-content {
    justify-content: flex-start;
}

.caverns-text {
    max-width: 540px;
}

/* Chamber 4 - The Sunlit Dome (text on right) */
#chamber-4 .chamber-content {
    justify-content: flex-end;
}

.dome-text {
    text-align: left;
}

/* Chamber 5 - The Vision (centered) */
#chamber-5 .chamber-content {
    justify-content: center;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.vision-text {
    max-width: 640px;
    text-align: center;
}

/* --- Chamber Titles --- */
.chamber-title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 6vw, 5.5rem);
    font-weight: 600;
    color: var(--moonstone-white);
    letter-spacing: 0.06em;
    line-height: 1.05;
    margin-bottom: 2.5rem;
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

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

/* --- Drop Caps --- */
.drop-cap {
    font-family: var(--font-accent);
    font-weight: 700;
    font-size: clamp(3rem, 5vw, 4.5rem);
    float: left;
    line-height: 0.8;
    margin-right: 0.12em;
    margin-top: 0.05em;
    color: var(--incense-ember);
}

#chamber-3 .drop-cap {
    color: var(--sacred-river);
}

#chamber-4 .drop-cap,
#chamber-5 .drop-cap {
    color: var(--kublas-gold);
}

/* --- Filigree Blocks --- */
.filigree-block {
    position: relative;
    padding: 2.5rem 2.8rem;
    margin-bottom: 2rem;
    transition: transform 0.15s ease;
    will-change: transform;
}

.filigree-border {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    transition: opacity 0.6s ease;
}

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

.filigree-block:hover .filigree-border {
    opacity: 1;
}

.filigree-block:hover .filigree-svg line,
.filigree-block:hover .filigree-svg circle,
.filigree-block:hover .filigree-svg path,
.filigree-block:hover .filigree-svg rect {
    opacity: 0.8;
}

.filigree-content p {
    margin-bottom: 1.2rem;
    color: var(--alabaster-mist);
}

.filigree-content p:last-child {
    margin-bottom: 0;
}

/* --- Scroll Card (Card Flip) --- */
.scroll-card {
    width: 100%;
    max-width: 460px;
    height: 200px;
    perspective: 1000px;
    cursor: pointer;
    margin-top: 2rem;
}

.scroll-card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    transition: transform 0.8s cubic-bezier(0.25, 0.1, 0.25, 1);
    transform-style: preserve-3d;
}

.scroll-card.flipped .scroll-card-inner {
    transform: rotateY(180deg);
}

.scroll-card-front,
.scroll-card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    border: 1px solid rgba(46, 139, 139, 0.3);
    border-radius: 4px;
    background: rgba(11, 14, 26, 0.6);
}

.scroll-card-back {
    transform: rotateY(180deg);
    border-color: rgba(200, 164, 94, 0.3);
}

.scroll-card-back p {
    font-size: 0.95rem;
    line-height: 1.7;
    color: var(--alabaster-mist);
}

.scroll-card-back em {
    color: var(--kublas-gold);
    font-style: italic;
}

.scroll-seal {
    width: 200px;
    height: 60px;
    margin-bottom: 0.8rem;
}

.scroll-hint {
    font-family: var(--font-body);
    font-weight: 300;
    font-size: 0.85rem;
    color: var(--sacred-river);
    opacity: 0.7;
}

/* --- River Alph Dividers --- */
.river-divider {
    position: relative;
    width: 100%;
    height: 80px;
    z-index: 5;
    overflow: visible;
}

.river-svg {
    width: 100%;
    height: 100%;
    overflow: visible;
}

.river-path {
    stroke: var(--sacred-river);
    stroke-dasharray: 2000;
    stroke-dashoffset: 2000;
    transition: stroke 0.6s ease;
}

.river-path.drawn {
    stroke-dashoffset: 0;
    transition: stroke-dashoffset 2.4s cubic-bezier(0.25, 0.1, 0.25, 1), stroke 0.6s ease;
}

.river-droplet {
    color: var(--sacred-river);
}

/* River color shifts from teal at top to gold at bottom */
[data-river="3"] .river-path,
[data-river="4"] .river-path {
    stroke: var(--kublas-gold);
}

[data-river="3"] .river-droplet,
[data-river="4"] .river-droplet {
    color: var(--kublas-gold);
}

[data-river="2"] .river-path {
    stroke: #3A9B9B;
}

[data-river="2"] .river-droplet {
    color: #3A9B9B;
}

/* --- Domain Echo (Chamber 5) --- */
.domain-echo {
    font-family: var(--font-display);
    font-size: clamp(1.5rem, 3vw, 2.5rem);
    font-weight: 600;
    color: var(--moonstone-white);
    letter-spacing: 0.1em;
    margin-top: 4rem;
    opacity: 0.5;
    text-shadow: 0 0 40px rgba(200, 164, 94, 0.3);
}

/* --- Fade to White (Chamber 5 bottom) --- */
.fade-to-white {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 20vh;
    background: linear-gradient(to bottom, transparent 0%, var(--moonstone-white) 100%);
    z-index: 20;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.3s ease;
}

/* --- Compass Pulse (Chamber 5) --- */
@keyframes compassPulse {
    0%, 100% { opacity: 0.7; filter: drop-shadow(0 0 6px rgba(200, 164, 94, 0.3)); }
    50% { opacity: 1; filter: drop-shadow(0 0 12px rgba(200, 164, 94, 0.6)); }
}

#compass-nav.pulsing #compass-rose {
    animation: compassPulse 3s ease-in-out infinite;
}

/* --- Bounce Enter Animation --- */
@keyframes bounceEnter {
    0% {
        opacity: 0;
        transform: translateY(30px);
    }
    60% {
        opacity: 1;
        transform: translateY(-5px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

.bounce-enter {
    opacity: 0;
    transform: translateY(30px);
}

.bounce-enter.visible {
    animation: bounceEnter 0.7s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

/* --- Responsive --- */
@media (max-width: 768px) {
    .chamber-content {
        padding: 6vh 5vw;
        flex-direction: column;
        justify-content: center !important;
    }

    .chamber-text {
        max-width: 100%;
    }

    .arch-silhouette {
        width: 90%;
        opacity: 0.3;
        left: 5% !important;
        right: auto !important;
    }

    .silhouette-center {
        left: 10% !important;
        width: 80%;
    }

    .filigree-block {
        padding: 1.5rem 1.8rem;
    }

    #compass-menu {
        width: 240px;
        height: 240px;
    }

    .compass-link {
        font-size: 0.55rem;
    }

    .hero-title {
        font-size: clamp(3rem, 10vw, 6rem);
    }

    .scroll-card {
        height: 240px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: clamp(2.5rem, 14vw, 4.5rem);
    }

    .chamber-title {
        font-size: clamp(2rem, 8vw, 3.5rem);
    }

    .filigree-block {
        padding: 1.2rem 1rem;
    }
}

/* --- Selection --- */
::selection {
    background: rgba(200, 164, 94, 0.3);
    color: var(--moonstone-white);
}

/* --- Scrollbar --- */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: var(--obsidian-depth);
}

::-webkit-scrollbar-thumb {
    background: var(--cavern-violet);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--pleasure-dome-rose);
}