/* tnhec.com - Brutalist Zen Monastery with Aurora Light */

/* === CSS Custom Properties === */
:root {
    --obsidian: #0a0a0a;
    --charcoal: #1a1a18;
    --burnished-gold: #c9a84c;
    --pale-gold: #e8d5a3;
    --aurora-green: #2d6e5e;
    --aurora-violet: #5b3a6e;
    --bone-white: #e8e4dc;
    --concrete-gray: #4a4a46;
}

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

html {
    overflow: hidden;
    height: 100%;
}

body {
    background: var(--obsidian);
    color: var(--bone-white);
    font-family: 'IBM Plex Sans', sans-serif;
    font-weight: 300;
    font-size: 1.125rem;
    line-height: 1.8;
    overflow: hidden;
    height: 100%;
    width: 100%;
    cursor: default;
}

/* === Progress Bar === */
#progress-bar {
    position: fixed;
    top: 0;
    left: 0;
    height: 2px;
    width: 0%;
    background: var(--burnished-gold);
    z-index: 1000;
    transition: width 0.1s linear;
}

/* === Chamber Navigation Ticks === */
#chamber-nav {
    position: fixed;
    top: 12px;
    left: 0;
    width: 100%;
    display: flex;
    justify-content: center;
    gap: 40px;
    z-index: 999;
    pointer-events: auto;
}

.nav-tick {
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px 4px;
    position: relative;
}

.nav-tick span {
    font-family: 'Space Mono', monospace;
    font-size: 0.75rem;
    font-weight: 400;
    text-transform: uppercase;
    letter-spacing: 0.25em;
    color: var(--concrete-gray);
    transition: color 0.5s ease;
}

.nav-tick::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 12px;
    height: 1px;
    background: var(--concrete-gray);
    transition: background 0.5s ease, width 0.3s ease;
}

.nav-tick.active span {
    color: var(--burnished-gold);
}

.nav-tick.active::after {
    background: var(--burnished-gold);
    width: 20px;
}

/* === Scroll Container === */
#scroll-container {
    display: flex;
    width: 700vw;
    height: 100vh;
    scroll-snap-type: x mandatory;
    overscroll-behavior: contain;
}

/* === Chamber Base === */
.chamber {
    width: 100vw;
    height: 100vh;
    flex-shrink: 0;
    position: relative;
    overflow: hidden;
    background: var(--obsidian);
    scroll-snap-align: start;
}

/* === Grain Overlay === */
.chamber::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='300' height='300'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='300' height='300' filter='url(%23n)' opacity='0.08'/%3E%3C/svg%3E");
    pointer-events: none;
    z-index: 5;
    opacity: 0.08;
}

/* === Chamber Numbers (ghost numerals) === */
.chamber-number {
    position: absolute;
    font-family: 'Cormorant Garamond', serif;
    font-style: italic;
    font-weight: 600;
    font-size: 20vw;
    color: var(--charcoal);
    z-index: 0;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) translateX(-5vw);
    line-height: 1;
    user-select: none;
    pointer-events: none;
    opacity: 0;
    transition: transform 2s cubic-bezier(0.22, 1, 0.36, 1), opacity 1.5s ease;
}

.chamber.in-view .chamber-number {
    transform: translate(-50%, -50%) translateX(0);
    opacity: 1;
}

/* === Chamber 1: Portal === */
.portal-content {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2;
}

.gold-line-vertical {
    position: absolute;
    top: 15%;
    bottom: 15%;
    left: 50%;
    width: 1px;
    background: var(--burnished-gold);
    transform: translateX(-50%);
    box-shadow: 0 0 20px rgba(45, 110, 94, 0.15), 0 0 40px rgba(91, 58, 110, 0.1);
    z-index: 1;
}

.portal-title {
    font-family: 'Cormorant Garamond', serif;
    font-weight: 600;
    font-size: 5.5rem;
    color: var(--bone-white);
    letter-spacing: 0.08em;
    position: relative;
    z-index: 2;
    text-align: center;
}

.portal-title .letter {
    display: inline-block;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease, transform 0.5s cubic-bezier(0.22, 1, 0.36, 1);
}

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

/* === Chamber Split Layout === */
.chamber-split {
    display: flex;
    width: 100%;
    height: 100%;
    position: relative;
    z-index: 2;
}

.chamber-split.reverse {
    flex-direction: row-reverse;
}

.left-col, .right-col {
    width: 50%;
    height: 100%;
    position: relative;
}

/* === Chamber Text === */
.chamber-text {
    display: flex;
    align-items: center;
    padding: 10vh 8vw;
}

.text-reveal .label {
    font-family: 'Space Mono', monospace;
    font-size: 0.75rem;
    font-weight: 400;
    text-transform: uppercase;
    letter-spacing: 0.25em;
    color: var(--burnished-gold);
    display: block;
    margin-bottom: 2rem;
}

.text-reveal h2 {
    font-family: 'Cormorant Garamond', serif;
    font-weight: 600;
    font-size: 4.5rem;
    line-height: 1.1;
    color: var(--bone-white);
    margin-bottom: 2rem;
}

.text-reveal h2 em {
    font-style: italic;
    color: var(--pale-gold);
}

.gold-rule {
    width: 80px;
    height: 1px;
    background: var(--burnished-gold);
    margin-bottom: 2rem;
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.9s cubic-bezier(0.22, 1, 0.36, 1);
}

.chamber.in-view .gold-rule {
    transform: scaleX(1);
}

.text-reveal p {
    color: var(--bone-white);
    margin-bottom: 1.2rem;
    max-width: 480px;
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1), transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}

.text-reveal .label,
.text-reveal h2 {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1), transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}

.chamber.in-view .text-reveal .label {
    opacity: 1;
    transform: translateY(0);
    transition-delay: 0ms;
}

.chamber.in-view .text-reveal h2 {
    opacity: 1;
    transform: translateY(0);
    transition-delay: 80ms;
}

.chamber.in-view .text-reveal p:nth-of-type(1) {
    opacity: 1;
    transform: translateY(0);
    transition-delay: 240ms;
}

.chamber.in-view .text-reveal p:nth-of-type(2) {
    opacity: 1;
    transform: translateY(0);
    transition-delay: 320ms;
}

/* === Chamber Image === */
.chamber-image {
    overflow: hidden;
}

.image-container {
    width: 100%;
    height: 100%;
    position: relative;
    opacity: 0;
    transition: opacity 1.2s ease 0.3s;
}

.chamber.in-view .image-container {
    opacity: 1;
}

.vintage-image {
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    filter: sepia(0.3) contrast(1.1) brightness(0.9);
}

.image-vignette {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(ellipse at center, transparent 40%, var(--obsidian) 100%);
    pointer-events: none;
}

/* === Aurora Top Edge === */
.aurora-top {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    z-index: 10;
    animation: auroraShift 60s ease-in-out infinite;
}

@keyframes auroraShift {
    0%, 100% { background: linear-gradient(90deg, transparent 10%, var(--aurora-green) 40%, var(--aurora-violet) 70%, transparent 90%); }
    50% { background: linear-gradient(90deg, transparent 10%, var(--aurora-violet) 30%, var(--aurora-green) 60%, transparent 90%); }
}

/* === Chamber 6: Void === */
.chamber-void {
    background: var(--obsidian);
}

.void-aurora {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(ellipse at 20% 30%, rgba(45, 110, 94, 0.08) 0%, transparent 50%),
                radial-gradient(ellipse at 80% 70%, rgba(91, 58, 110, 0.06) 0%, transparent 50%),
                radial-gradient(ellipse at 50% 50%, rgba(45, 110, 94, 0.03) 0%, transparent 70%);
    animation: voidBreathe 8s ease-in-out infinite;
    z-index: 1;
}

@keyframes voidBreathe {
    0%, 100% { opacity: 0.05; }
    50% { opacity: 0.12; }
}

/* === Chamber 7: Close === */
.chamber-close {
    background: var(--obsidian);
}

.close-content {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    padding-left: 12vw;
    z-index: 2;
}

.close-text {
    font-family: 'Cormorant Garamond', serif;
    font-weight: 600;
    font-style: italic;
    font-size: 3rem;
    color: var(--pale-gold);
    max-width: 600px;
    line-height: 1.4;
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1), transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}

.chamber-close.in-view .close-text {
    opacity: 1;
    transform: translateY(0);
}

.gold-circle {
    width: 80px;
    height: 80px;
    border: 1px solid var(--burnished-gold);
    border-radius: 50%;
    margin-top: 4rem;
    transition: transform 1.5s cubic-bezier(0.22, 1, 0.36, 1), opacity 1.5s ease;
    opacity: 0;
}

.chamber-close.in-view .gold-circle {
    opacity: 1;
}

.chamber-close.exiting .gold-circle {
    transform: scale(0);
}

/* === Concrete texture for secondary backgrounds === */
.chamber:nth-child(even) {
    background: var(--charcoal);
}

.chamber:nth-child(even) .chamber-number {
    color: #222220;
}

/* === Gold Circle Transition Motif === */

/* === Responsive considerations === */
@media (max-width: 768px) {
    .portal-title {
        font-size: 3rem;
    }

    .text-reveal h2 {
        font-size: 2.5rem;
    }

    .chamber-split,
    .chamber-split.reverse {
        flex-direction: column;
    }

    .left-col, .right-col {
        width: 100%;
        height: 50%;
    }

    .chamber-text {
        padding: 5vh 6vw;
    }

    .chamber-number {
        font-size: 30vw;
    }

    .close-text {
        font-size: 2rem;
    }

    #chamber-nav {
        gap: 20px;
    }
}

/* === Prefers reduced motion === */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        transition: none !important;
        animation: none !important;
    }

    .text-reveal .label,
    .text-reveal h2,
    .text-reveal p,
    .portal-title .letter,
    .image-container,
    .gold-rule,
    .chamber-number,
    .close-text,
    .gold-circle {
        opacity: 1 !important;
        transform: none !important;
    }
}