/* Great Zimbabwe Sacred Atmosphere Styles */
:root {
    --gz-primary: #D4AF37;       /* Royal Gold */
    --gz-secondary: #0A0A08;     /* Granite Charcoal */
    --gz-accent: #E5C158;        /* Soft sunlight on granite */
    --font-serif: "Playfair Display", serif;
    --font-display: "Space Grotesk", sans-serif;
}

body {
    background-color: var(--gz-secondary);
    margin: 0;
    overflow: hidden;
    color: white;
    font-family: var(--font-display);
}

.great-zimbabwe-system {
    position: fixed;
    inset: 0;
    z-index: 1;
    overflow: hidden;
    background: #000;
}

/* Atmospheric Layered Backgrounds */
.gz-bg-layer {
    position: fixed;
    inset: 0;
    z-index: 1;
    pointer-events: none;
}

.gz-image {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0;
    transition: opacity 12s cubic-bezier(0.25, 1, 0.4, 1);
    filter: saturate(0.55) contrast(1.1) brightness(0.72) sepia(0.22);
}

.gz-image.active {
    opacity: 0.82;
}

/* 4 Unique Continuous Cinematic Drifts (Never Stop) */
.gz-image:nth-of-type(4n+1) {
    animation: gzDriftOne 32s cubic-bezier(0.2, 0.4, 0.3, 0.9) infinite alternate both;
}

.gz-image:nth-of-type(4n+2) {
    animation: gzDriftTwo 36s cubic-bezier(0.2, 0.4, 0.3, 0.9) infinite alternate both;
}

.gz-image:nth-of-type(4n+3) {
    animation: gzDriftThree 30s cubic-bezier(0.2, 0.4, 0.3, 0.9) infinite alternate both;
}

.gz-image:nth-of-type(4n+4) {
    animation: gzDriftFour 40s cubic-bezier(0.2, 0.4, 0.3, 0.9) infinite alternate both;
}

@keyframes gzDriftOne {
    0% { transform: scale(1.05) translate(0, 0) rotate(0deg); }
    100% { transform: scale(1.2) translate(1.5%, -1.5%) rotate(0.5deg); }
}

@keyframes gzDriftTwo {
    0% { transform: scale(1.22) translate(-2%, 1%) rotate(-0.3deg); }
    100% { transform: scale(1.04) translate(0.5%, -0.5%) rotate(0.2deg); }
}

@keyframes gzDriftThree {
    0% { transform: scale(1.03) translate(-1%, -1.5%) rotate(-0.4deg); }
    100% { transform: scale(1.18) translate(1.2%, 1%) rotate(0.3deg); }
}

@keyframes gzDriftFour {
    0% { transform: scale(1.24) translate(1.5%, 1.5%) rotate(0.4deg); }
    100% { transform: scale(1.02) translate(-1%, -1%) rotate(-0.3deg); }
}

/* Moving Shadows Overlays: Golden Sacred Hour */
.moving-shadow-overlay {
    position: fixed;
    inset: 0;
    z-index: 2;
    pointer-events: none;
    background: linear-gradient(135deg, rgba(4, 2, 1, 0) 25%, rgba(0, 0, 0, 0.72) 75%);
    mix-blend-mode: multiply;
    animation: shadowPulse 24s ease-in-out infinite alternate;
}

@keyframes shadowPulse {
    0% { opacity: 0.65; transform: scale(1); }
    100% { opacity: 0.92; transform: scale(1.06) rotate(1deg); }
}

/* Firelight Flicker Overlay */
.firelight-flicker-overlay {
    position: fixed;
    inset: 0;
    z-index: 3;
    pointer-events: none;
    background: radial-gradient(circle at 50% 90%, rgba(212, 137, 30, 0.12) 0%, rgba(255, 85, 0, 0.03) 45%, transparent 75%);
    mix-blend-mode: screen;
    animation: subtleFirelight 8s infinite alternate cubic-bezier(0.45, 0.05, 0.55, 0.95);
}

@keyframes subtleFirelight {
    0% {
        opacity: 0.6;
        transform: scale(1) translateY(0);
    }
    25% {
        opacity: 0.95;
        transform: scale(1.04) translateY(-0.8%);
    }
    55% {
        opacity: 0.55;
        transform: scale(0.97) translateY(0.4%);
    }
    75% {
        opacity: 0.85;
        transform: scale(1.02) translateY(-0.3%);
    }
    100% {
        opacity: 0.7;
        transform: scale(1.05) translateY(-0.6%);
    }
}

/* Floating Ritual Smoke layers (Barely moving, extremely subtle) */
.smoke-layer {
    position: fixed;
    top: -20%;
    left: -10%;
    width: 120%;
    height: 60%;
    z-index: 4;
    pointer-events: none;
    opacity: 0.12;
    background: radial-gradient(ellipse at top, rgba(235, 220, 190, 0.15) 0%, rgba(4, 2, 1, 0) 70%);
    filter: blur(45px);
    animation: ritualSmoke 40s infinite ease-in-out alternate;
}

.smoke-layer-2 {
    position: fixed;
    top: -15%;
    right: -15%;
    width: 130%;
    height: 55%;
    z-index: 4;
    pointer-events: none;
    opacity: 0.08;
    background: radial-gradient(ellipse at top right, rgba(212, 175, 55, 0.1) 0%, rgba(4, 2, 1, 0) 75%);
    filter: blur(55px);
    animation: ritualSmokeDouble 34s infinite ease-in-out alternate-reverse;
}

@keyframes ritualSmoke {
    0% {
        transform: translate(0, 0) scale(1) rotate(0deg);
        filter: blur(40px);
    }
    50% {
        transform: translate(1.5%, 3%) scale(1.08) rotate(2deg);
        filter: blur(50px);
    }
    100% {
        transform: translate(-1%, 1.5%) scale(0.96) rotate(-1.5deg);
        filter: blur(45px);
    }
}

@keyframes ritualSmokeDouble {
    0% {
        transform: translate(0, 0) scale(1) rotate(0deg);
    }
    50% {
        transform: translate(-2%, 1.5%) scale(1.04) rotate(-3deg);
    }
    100% {
        transform: translate(1%, -1%) scale(0.97) rotate(1.5deg);
    }
}

/* Cinematic Fire Embers at lower screen regions */
.ember-container {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    height: 45vh;
    z-index: 4;
    pointer-events: none;
    overflow: hidden;
}

.ember {
    position: absolute;
    background: radial-gradient(circle, #ffb855 35%, rgba(212, 175, 55, 0.8) 75%, transparent 100%);
    border-radius: 50%;
    opacity: 0;
    box-shadow: 0 0 12px rgba(255, 110, 0, 0.7), 0 0 4px rgba(255, 200, 50, 0.8);
    animation: driftUpward 15s linear infinite;
}

@keyframes driftUpward {
    0% {
        transform: translateY(0) translateX(0);
        opacity: 0;
    }
    10% {
        opacity: 0.75;
    }
    50% {
        opacity: 0.5;
        transform: translateY(-22vh) translateX(var(--sway-amount));
    }
    85% {
        opacity: 0.2;
    }
    100% {
        transform: translateY(-48vh) translateX(calc(var(--sway-amount) * 1.6));
        opacity: 0;
    }
}

/* Atmospheric Overlays */
.overlay-texture {
    position: fixed;
    inset: 0;
    z-index: 5;
    pointer-events: none;
    background: radial-gradient(circle at center, transparent 15%, rgba(4, 2, 1, 0.95) 100%);
    opacity: 0.85;
}

.dust-overlay {
    position: fixed;
    inset: 0;
    z-index: 6;
    pointer-events: none;
    background: url('https://www.transparenttextures.com/patterns/carbon-fibre.png');
    opacity: 0.05;
    mix-blend-mode: overlay;
}

/* Start Button */
.inzwa-ngano-btn {
    position: relative;
    z-index: 20;
    background: transparent;
    border: 1px solid var(--gz-primary);
    color: var(--gz-primary);
    padding: 1.5rem 4rem;
    font-family: var(--font-display);
    font-size: 0.8rem;
    letter-spacing: 0.5em;
    cursor: pointer;
    transition: all 0.8s cubic-bezier(0.16, 1, 0.3, 1);
    backdrop-filter: blur(10px);
    overflow: hidden;
}

.inzwa-ngano-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--gz-primary);
    transform: translateX(-100%);
    transition: transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
    z-index: -1;
}

.inzwa-ngano-btn:hover {
    color: black;
}

.inzwa-ngano-btn:hover::before {
    transform: translateX(0);
}

.inzwa-ngano-btn.fade-out {
    opacity: 0;
    pointer-events: none;
    transform: translateY(20px);
}

/* Ngano UI */
.ngano-controls {
    position: fixed;
    bottom: 4rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 30;
    opacity: 0;
    transition: opacity 2s ease;
    text-align: center;
}

.ngano-controls.visible {
    opacity: 1;
}

.ngano-title {
    font-family: var(--font-serif);
    font-style: italic;
    font-size: 1.2rem;
    color: var(--gz-primary);
    margin-bottom: 0.5rem;
    display: block;
}

.ngano-progress-container {
    width: 200px;
    height: 1px;
    background: rgba(212, 175, 55, 0.2);
    margin: 0 auto;
    position: relative;
}

.ngano-progress-bar {
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    background: var(--gz-primary);
    width: 0%;
    transition: width 0.1s linear;
}

.ngano-subtitles {
    position: fixed;
    bottom: 8rem;
    left: 10%;
    right: 10%;
    text-align: center;
    font-family: var(--font-serif);
    font-size: clamp(1rem, 3vw, 1.5rem);
    font-style: italic;
    color: white;
    opacity: 0;
    transition: opacity 1s ease;
    z-index: 40;
    pointer-events: none;
    text-shadow: 0 4px 20px rgba(0,0,0,0.9);
}

.ngano-subtitles.visible {
    opacity: 0.8;
}

/* Scene Transitions */
.scene-vignette {
    position: fixed;
    inset: 0;
    z-index: 2;
    background: radial-gradient(circle at center, transparent 0%, #000 120%);
    pointer-events: none;
}