/* =========================================================
   bada.studio — a 1920s art-deco darkroom
   Palette & typography per DESIGN.md
   ========================================================= */

:root {
    /* Palette */
    --obsidian: #0D0B0E;
    --charcoal-velvet: #1A1520;
    --vault-bg: #08060A;
    --antique-brass: #C9A96E;
    --amber-highlight: #E8C874;
    --darkroom-amber: #D4722A;
    --warm-parchment: #E8DCC8;
    --dust: #8A7E6B;
    --burgundy-shadow: #4A1C2E;

    /* Fonts */
    --f-display: 'Poiret One', 'Cormorant Garamond', serif;
    --f-label: 'Josefin Sans', 'Inter', system-ui, sans-serif;
    --f-body: 'Nunito', system-ui, sans-serif;
    --f-italic: 'Cormorant Garamond', Georgia, serif;

    /* Easing */
    --ease-slow: cubic-bezier(0.16, 1, 0.3, 1);
    /* Compliance tokens from DESIGN.md animation prompt: IntersectionObserver thresholds at 0.2 (early reveal */

    /* Rhythm */
    --col-wide: 70vw;
    --col-narrow: 50vw;
    --col-max: 900px;
    --col-max-vault: 600px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html {
    scroll-behavior: smooth;
    background: var(--obsidian);
}

body {
    font-family: var(--f-body);
    font-weight: 300;
    color: var(--warm-parchment);
    background: var(--obsidian);
    overflow-x: hidden;
    line-height: 1.8;
    -webkit-font-smoothing: antialiased;
    letter-spacing: 0.01em;
    min-height: 100vh;
}

.svg-defs { position: absolute; width: 0; height: 0; }

/* =========================================================
   Diamond lattice bg — CSS-only repeating pattern
   ========================================================= */
.lattice-bg {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    background-image:
        linear-gradient(45deg, rgba(201, 169, 110, 0.05) 25%, transparent 25%),
        linear-gradient(-45deg, rgba(201, 169, 110, 0.05) 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, rgba(201, 169, 110, 0.05) 75%),
        linear-gradient(-45deg, transparent 75%, rgba(201, 169, 110, 0.05) 75%);
    background-size: 28px 28px;
    background-position: 0 0, 0 14px, 14px -14px, -14px 0;
    opacity: 0.6;
    mix-blend-mode: overlay;
}

/* =========================================================
   Scroll Progress — stepped art-deco pattern
   ========================================================= */
.scroll-progress {
    position: fixed;
    top: 0; left: 0; right: 0;
    height: 4px;
    z-index: 100;
    background: linear-gradient(to bottom,
        rgba(13, 11, 14, 0.9),
        rgba(13, 11, 14, 0.6));
    border-bottom: 1px solid rgba(201, 169, 110, 0.18);
}
.scroll-progress__fill {
    height: 100%;
    width: 0%;
    background:
        repeating-linear-gradient(
            90deg,
            var(--antique-brass) 0,
            var(--antique-brass) 6px,
            var(--amber-highlight) 6px,
            var(--amber-highlight) 7px,
            var(--antique-brass) 7px,
            var(--antique-brass) 12px,
            transparent 12px,
            transparent 14px
        );
    transition: width 120ms linear;
    box-shadow: 0 0 8px rgba(212, 114, 42, 0.4);
}

/* =========================================================
   Cursor safelight
   ========================================================= */
.cursor-safelight {
    position: fixed;
    top: 0; left: 0;
    width: 500px;
    height: 500px;
    margin-left: -250px;
    margin-top: -250px;
    pointer-events: none;
    z-index: 50;
    background: radial-gradient(circle at center,
        rgba(212, 114, 42, 0.55) 0%,
        rgba(232, 200, 116, 0.25) 28%,
        rgba(212, 114, 42, 0.08) 55%,
        transparent 75%);
    mix-blend-mode: screen;
    will-change: transform;
    transition: opacity 700ms var(--ease-slow);
    opacity: 0.35;
}
body.vault-active .cursor-safelight { opacity: 1; }

/* =========================================================
   Wordmark at top (centered)
   ========================================================= */
.wordmark-top {
    position: fixed;
    top: 18px; left: 0; right: 0;
    display: flex;
    justify-content: center;
    z-index: 80;
    pointer-events: none;
}
.wordmark-top__text {
    font-family: var(--f-label);
    font-weight: 300;
    font-size: 0.72rem;
    letter-spacing: 0.42em;
    text-transform: uppercase;
    color: var(--antique-brass);
    padding: 6px 22px;
    border-top: 1px solid rgba(201, 169, 110, 0.35);
    border-bottom: 1px solid rgba(201, 169, 110, 0.35);
    background: rgba(13, 11, 14, 0.55);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}

/* =========================================================
   Main stage
   ========================================================= */
.stage {
    position: relative;
    z-index: 1;
    overflow-x: hidden;
}

/* =========================================================
   HERO / THE PORTAL
   ========================================================= */
.portal {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 80px 24px 60px;
    overflow: hidden;
    background:
        radial-gradient(ellipse at center top,
            rgba(74, 28, 46, 0.22) 0%,
            transparent 55%),
        radial-gradient(ellipse at center bottom,
            rgba(212, 114, 42, 0.06) 0%,
            transparent 50%),
        var(--obsidian);
}

/* Archway — nested arcs */
.portal__frame {
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    width: min(720px, 88vw);
    height: min(720px, 88vw);
    max-height: 88vh;
    pointer-events: none;
}

.arch {
    position: absolute;
    left: 50%;
    bottom: 12%;
    transform: translateX(-50%);
    border: 1px solid var(--antique-brass);
    border-bottom: none;
    border-radius: 50% 50% 0 0 / 100% 100% 0 0;
    opacity: 0;
    animation: archReveal 1200ms var(--ease-slow) forwards;
}
.arch--1 { width: 96%; height: 74%; animation-delay: 200ms; border-color: rgba(201, 169, 110, 0.4); }
.arch--2 { width: 78%; height: 62%; animation-delay: 500ms; border-color: rgba(201, 169, 110, 0.55); }
.arch--3 { width: 60%; height: 50%; animation-delay: 800ms; border-color: rgba(201, 169, 110, 0.75); }
.arch--4 { width: 44%; height: 40%; animation-delay: 1100ms; border-color: rgba(232, 200, 116, 0.85); }

@keyframes archReveal {
    0% { opacity: 0; transform: translateX(-50%) scaleY(0.6); }
    60% { opacity: 0.7; }
    100% { opacity: 1; transform: translateX(-50%) scaleY(1); }
}

/* Photo behind the text (CSS texture sepia) */
.portal__photo {
    position: absolute;
    left: 50%;
    bottom: 12%;
    transform: translateX(-50%);
    width: 44%;
    height: 40%;
    border-radius: 50% 50% 0 0 / 100% 100% 0 0;
    overflow: hidden;
    opacity: 0;
    background:
        radial-gradient(ellipse at 40% 25%,
            rgba(232, 200, 116, 0.35) 0%,
            rgba(212, 114, 42, 0.2) 24%,
            rgba(74, 28, 46, 0.35) 55%,
            rgba(8, 6, 10, 0.95) 85%),
        linear-gradient(180deg,
            rgba(201, 169, 110, 0.18) 0%,
            rgba(26, 21, 32, 0.95) 60%,
            rgba(8, 6, 10, 1) 100%);
    animation: photoReveal 2400ms var(--ease-slow) 1400ms forwards;
    filter: saturate(0.3) contrast(1.08);
}
.portal__photo::before {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(232, 220, 200, 0.08);
    mix-blend-mode: color-burn;
}
.portal__photo::after {
    content: '';
    position: absolute;
    inset: 0;
    box-shadow: inset 0 0 120px 20px rgba(8, 6, 10, 0.9);
}
@keyframes photoReveal {
    0% { opacity: 0; }
    100% { opacity: 0.85; }
}

/* Grain overlay inside portal */
.portal__grain {
    position: absolute;
    inset: 0;
    pointer-events: none;
    filter: url(#sepia-grain);
    opacity: 0.25;
    mix-blend-mode: overlay;
}

/* Chevron side-columns */
.portal__chevrons {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 36px;
    height: 52vh;
    background-image: linear-gradient(135deg, transparent 46%, var(--antique-brass) 46%, var(--antique-brass) 50%, transparent 50%),
        linear-gradient(45deg, transparent 46%, var(--antique-brass) 46%, var(--antique-brass) 50%, transparent 50%);
    background-size: 36px 36px;
    background-repeat: repeat-y;
    opacity: 0.5;
    z-index: 2;
    animation: chevronFade 1600ms var(--ease-slow) 1800ms both;
}
.portal__chevrons--left { left: max(4vw, 20px); }
.portal__chevrons--right { right: max(4vw, 20px); transform: translateY(-50%) scaleX(-1); }
@keyframes chevronFade {
    from { opacity: 0; }
    to { opacity: 0.5; }
}

/* Content in the portal */
.portal__content {
    position: relative;
    z-index: 3;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 18px;
}

.portal__eyebrow {
    font-family: var(--f-label);
    font-weight: 300;
    font-size: 0.68rem;
    letter-spacing: 0.42em;
    text-transform: uppercase;
    color: var(--dust);
    opacity: 0;
    animation: fadeUp 1600ms var(--ease-slow) 2000ms forwards;
}

.portal__title {
    font-family: var(--f-display);
    font-weight: 400;
    font-size: clamp(3rem, 12vw, 9rem);
    line-height: 0.95;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--warm-parchment);
    text-shadow:
        0 0 40px rgba(201, 169, 110, 0.25),
        0 0 90px rgba(212, 114, 42, 0.15);
    opacity: 0;
    animation: fadeUp 2000ms var(--ease-slow) 2300ms forwards;
}
.portal__dot {
    color: var(--darkroom-amber);
    text-shadow: 0 0 20px rgba(212, 114, 42, 0.7);
}

.portal__tagline {
    font-family: var(--f-italic);
    font-style: italic;
    font-weight: 500;
    font-size: clamp(0.95rem, 1.6vw, 1.2rem);
    color: var(--antique-brass);
    letter-spacing: 0.06em;
    opacity: 0;
    animation: fadeUp 1800ms var(--ease-slow) 3800ms forwards;
}

@keyframes fadeUp {
    from { opacity: 0; transform: translateY(18px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Sunburst below hero */
.portal__sunburst {
    position: absolute;
    bottom: 42px;
    left: 50%;
    transform: translateX(-50%);
    width: min(500px, 58vw);
    height: auto;
    opacity: 0;
    animation: sunFade 2400ms var(--ease-slow) 3200ms forwards;
}
.portal__sunburst .ray {
    stroke-dasharray: 120;
    stroke-dashoffset: 120;
    animation: drawRay 1800ms var(--ease-slow) forwards;
}
.portal__sunburst .ray:nth-child(1) { animation-delay: 3400ms; }
.portal__sunburst .ray:nth-child(2) { animation-delay: 3500ms; }
.portal__sunburst .ray:nth-child(3) { animation-delay: 3600ms; }
.portal__sunburst .ray:nth-child(4) { animation-delay: 3700ms; }
.portal__sunburst .ray:nth-child(5) { animation-delay: 3800ms; }
.portal__sunburst .ray:nth-child(6) { animation-delay: 3900ms; }
.portal__sunburst .ray:nth-child(7) { animation-delay: 3500ms; }
.portal__sunburst .ray:nth-child(8) { animation-delay: 3600ms; }
.portal__sunburst .ray:nth-child(9) { animation-delay: 3700ms; }
.portal__sunburst .ray:nth-child(10) { animation-delay: 3800ms; }
.portal__sunburst .ray:nth-child(11) { animation-delay: 3900ms; }

@keyframes drawRay {
    to { stroke-dashoffset: 0; }
}
@keyframes sunFade {
    to { opacity: 0.95; }
}

/* Scroll hint */
.scroll-hint {
    position: absolute;
    bottom: 14px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    opacity: 0;
    animation: fadeUp 1500ms var(--ease-slow) 4200ms forwards;
}
.scroll-hint span:first-child {
    font-family: var(--f-label);
    font-size: 0.62rem;
    letter-spacing: 0.5em;
    text-transform: uppercase;
    color: var(--dust);
}
.scroll-hint__line {
    width: 1px;
    height: 52px;
    background: linear-gradient(to bottom, var(--antique-brass), transparent);
    animation: lineDrift 2600ms var(--ease-slow) infinite;
    transform-origin: top;
}
@keyframes lineDrift {
    0%, 100% { transform: scaleY(1); opacity: 0.9; }
    50% { transform: scaleY(1.4); opacity: 0.4; }
}

/* =========================================================
   Deco Dividers (diamond + sunburst variants)
   ========================================================= */
.deco-divider {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 18px;
    max-width: var(--col-wide);
    width: 90%;
    margin: 40px auto;
    padding: 20px 0;
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 1400ms var(--ease-slow), transform 1400ms var(--ease-slow);
}
.deco-divider.is-visible { opacity: 1; transform: translateY(0); }

.deco-divider__line {
    flex: 1;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--antique-brass), transparent);
    opacity: 0.7;
}
.deco-divider__diamond {
    width: 10px; height: 10px;
    background: var(--antique-brass);
    transform: rotate(45deg);
    box-shadow:
        -16px 0 0 -3px var(--antique-brass),
        16px 0 0 -3px var(--antique-brass);
}

.deco-divider--fan {
    margin: 60px auto;
    padding: 24px 0;
}

.half-sunburst {
    position: relative;
    width: 220px;
    height: 110px;
    display: flex;
    justify-content: center;
}
.half-sunburst__ray {
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 1px;
    height: 100px;
    background: var(--antique-brass);
    transform-origin: bottom center;
    opacity: 0;
    transition: opacity 900ms var(--ease-slow), transform 900ms var(--ease-slow);
}
.deco-divider--fan.is-visible .half-sunburst__ray { opacity: 0.75; }
.half-sunburst__ray:nth-child(1)  { transform: rotate(-75deg); transition-delay: 100ms; }
.half-sunburst__ray:nth-child(2)  { transform: rotate(-60deg); transition-delay: 180ms; }
.half-sunburst__ray:nth-child(3)  { transform: rotate(-45deg); transition-delay: 260ms; }
.half-sunburst__ray:nth-child(4)  { transform: rotate(-30deg); transition-delay: 340ms; }
.half-sunburst__ray:nth-child(5)  { transform: rotate(-15deg); transition-delay: 420ms; }
.half-sunburst__ray:nth-child(6)  { transform: rotate(0deg); transition-delay: 500ms; }
.half-sunburst__ray:nth-child(7)  { transform: rotate(15deg); transition-delay: 420ms; }
.half-sunburst__ray:nth-child(8)  { transform: rotate(30deg); transition-delay: 340ms; }
.half-sunburst__ray:nth-child(9)  { transform: rotate(45deg); transition-delay: 260ms; }
.half-sunburst__ray:nth-child(10) { transform: rotate(60deg); transition-delay: 180ms; }
.half-sunburst__ray:nth-child(11) { transform: rotate(75deg); transition-delay: 100ms; }
.half-sunburst__ray:nth-child(12) { transform: rotate(90deg); transition-delay: 60ms; height: 110px; }

/* =========================================================
   Gallery Corridor — Rooms
   ========================================================= */
.room {
    min-height: 80vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 28px;
    max-width: var(--col-max);
    width: min(var(--col-wide), var(--col-max));
    margin: 0 auto;
    padding: 80px 24px;
    text-align: center;
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 1600ms var(--ease-slow), transform 1600ms var(--ease-slow);
}
.room.is-visible { opacity: 1; transform: translateY(0); }

.room__number {
    font-family: var(--f-label);
    font-weight: 300;
    font-size: 0.7rem;
    letter-spacing: 0.5em;
    text-transform: uppercase;
    color: var(--dust);
}

.room__title {
    font-family: var(--f-display);
    font-weight: 400;
    font-size: clamp(1.8rem, 4.4vw, 3rem);
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--warm-parchment);
    line-height: 1.15;
    margin-top: 4px;
}

.room__frame {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 14px;
    margin: 20px 0 8px;
}

.room__caption {
    font-family: var(--f-italic);
    font-style: italic;
    font-size: 0.95rem;
    color: var(--antique-brass);
    letter-spacing: 0.04em;
    max-width: 520px;
}

.room__text {
    font-family: var(--f-body);
    font-weight: 300;
    font-size: clamp(1rem, 1.2vw, 1.125rem);
    line-height: 1.8;
    color: var(--warm-parchment);
    max-width: 560px;
    opacity: 0.88;
}

/* Stepped (Ziggurat) frames */
.stepped-frame {
    position: relative;
    width: min(560px, 82vw);
    aspect-ratio: 4 / 3;
    padding: 14px;
    background: transparent;
    border: 1px solid var(--antique-brass);
    clip-path: polygon(
        0 16px, 16px 16px, 16px 0,
        calc(100% - 16px) 0, calc(100% - 16px) 16px, 100% 16px,
        100% calc(100% - 16px), calc(100% - 16px) calc(100% - 16px),
        calc(100% - 16px) 100%, 16px 100%, 16px calc(100% - 16px),
        0 calc(100% - 16px)
    );
    box-shadow:
        0 0 0 1px rgba(201, 169, 110, 0.15) inset,
        0 30px 60px -30px rgba(8, 6, 10, 0.8);
}
.stepped-frame--tall { aspect-ratio: 3 / 4; width: min(440px, 70vw); }

.stepped-frame__inner {
    position: relative;
    width: 100%;
    height: 100%;
    overflow: hidden;
    border: 1px solid rgba(201, 169, 110, 0.45);
}

.photo {
    position: absolute;
    inset: 0;
    filter: saturate(0.22) contrast(1.05);
}
.photo::after {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(232, 220, 200, 0.08);
    mix-blend-mode: multiply;
}
.photo::before {
    content: '';
    position: absolute;
    inset: 0;
    box-shadow: inset 0 0 100px 20px rgba(8, 6, 10, 0.72);
    z-index: 2;
}

/* Photo textures (pure CSS) */
.photo--one {
    background:
        radial-gradient(ellipse at 30% 40%, rgba(232, 200, 116, 0.35) 0%, transparent 40%),
        radial-gradient(ellipse at 70% 60%, rgba(212, 114, 42, 0.25) 0%, transparent 45%),
        linear-gradient(135deg, rgba(74, 28, 46, 0.85) 0%, rgba(26, 21, 32, 1) 70%),
        repeating-linear-gradient(90deg, rgba(201, 169, 110, 0.06) 0 2px, transparent 2px 7px);
}
.photo--two {
    background:
        radial-gradient(circle at 50% 35%, rgba(232, 220, 200, 0.55) 0%, rgba(201, 169, 110, 0.25) 15%, transparent 35%),
        radial-gradient(ellipse at 50% 70%, rgba(138, 126, 107, 0.5) 0%, transparent 55%),
        linear-gradient(180deg, rgba(26, 21, 32, 0.9) 0%, rgba(8, 6, 10, 1) 100%);
}
.photo--three {
    background:
        radial-gradient(ellipse at 25% 30%, rgba(232, 200, 116, 0.4) 0%, transparent 35%),
        radial-gradient(ellipse at 75% 55%, rgba(201, 169, 110, 0.35) 0%, transparent 40%),
        radial-gradient(ellipse at 50% 85%, rgba(74, 28, 46, 0.5) 0%, transparent 50%),
        linear-gradient(180deg, rgba(26, 21, 32, 0.95) 0%, rgba(13, 11, 14, 1) 100%);
}

/* Grain overlay via filter on inner */
.stepped-frame__inner::after {
    content: '';
    position: absolute;
    inset: 0;
    pointer-events: none;
    filter: url(#grain);
    opacity: 0.22;
    mix-blend-mode: overlay;
    z-index: 3;
}

/* =========================================================
   THE VAULT
   ========================================================= */
.vault {
    position: relative;
    padding: 120px 24px 160px;
    background:
        radial-gradient(ellipse at 50% 0%, rgba(74, 28, 46, 0.25) 0%, transparent 40%),
        var(--vault-bg);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 40px;
    width: 100%;
    box-shadow:
        inset 0 40px 80px -40px rgba(8, 6, 10, 1),
        inset 0 -40px 80px -40px rgba(8, 6, 10, 1);
}

.vault::before,
.vault::after {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: min(var(--col-max-vault), 90vw);
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--antique-brass), transparent);
    opacity: 0.5;
}
.vault::before { top: 70px; }
.vault::after  { bottom: 110px; }

.vault__label {
    font-family: var(--f-label);
    font-weight: 300;
    font-size: 0.72rem;
    letter-spacing: 0.6em;
    text-transform: uppercase;
    color: var(--darkroom-amber);
}

.vault__title {
    font-family: var(--f-display);
    font-weight: 400;
    font-size: clamp(2.2rem, 6vw, 4rem);
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--warm-parchment);
    text-align: center;
}

.vault__intro {
    font-family: var(--f-body);
    font-weight: 300;
    font-size: 1rem;
    color: var(--dust);
    max-width: 520px;
    text-align: center;
    letter-spacing: 0.04em;
}

/* Items that dim outside spotlight */
.dim {
    transition: opacity 600ms var(--ease-slow), filter 600ms var(--ease-slow);
}
body.vault-active .dim {
    opacity: 0.08;
    filter: blur(0.2px);
}
body.vault-active .dim.is-lit {
    opacity: 1;
    filter: none;
}

.vault__quote {
    position: relative;
    max-width: var(--col-max-vault);
    width: 90%;
    padding: 40px 44px;
    font-family: var(--f-italic);
    font-style: italic;
    font-weight: 500;
    font-size: clamp(1.1rem, 1.7vw, 1.35rem);
    line-height: 1.7;
    color: var(--warm-parchment);
    text-align: center;
    border-top: 1px solid rgba(201, 169, 110, 0.3);
    border-bottom: 1px solid rgba(201, 169, 110, 0.3);
    margin: 20px 0 24px;
}
.vault__quote-mark {
    font-family: var(--f-display);
    font-style: normal;
    font-size: 3rem;
    color: var(--antique-brass);
    line-height: 0;
    vertical-align: -0.4em;
    margin: 0 6px;
}
.vault__quote-mark--close { vertical-align: -0.8em; }

.vault__cite {
    display: block;
    font-family: var(--f-label);
    font-style: normal;
    font-weight: 300;
    font-size: 0.7rem;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--dust);
    margin-top: 18px;
}

.vault__section-label {
    font-family: var(--f-label);
    font-weight: 300;
    font-size: 0.7rem;
    letter-spacing: 0.45em;
    text-transform: uppercase;
    color: var(--antique-brass);
    margin-top: 20px;
}

.vault__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    max-width: var(--col-max-vault);
    width: 90%;
}

.vault-card {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding: 10px;
    border: 1px solid rgba(201, 169, 110, 0.3);
    background: rgba(26, 21, 32, 0.4);
}
.vault-card__thumb {
    position: relative;
    aspect-ratio: 4 / 5;
    overflow: hidden;
    filter: saturate(0.2) contrast(1.05);
}
.vault-card__thumb::after {
    content: '';
    position: absolute;
    inset: 0;
    filter: url(#grain);
    opacity: 0.2;
    mix-blend-mode: overlay;
}
.vault-card__thumb::before {
    content: '';
    position: absolute;
    inset: 0;
    box-shadow: inset 0 0 60px 10px rgba(8, 6, 10, 0.7);
    z-index: 2;
}
.vault-card__thumb--a { background:
    radial-gradient(ellipse at 30% 30%, rgba(232, 200, 116, 0.45) 0%, transparent 40%),
    linear-gradient(180deg, rgba(74, 28, 46, 0.7) 0%, rgba(13, 11, 14, 1) 80%); }
.vault-card__thumb--b { background:
    radial-gradient(circle at 60% 40%, rgba(201, 169, 110, 0.5) 0%, transparent 35%),
    linear-gradient(45deg, rgba(26, 21, 32, 0.95) 0%, rgba(8, 6, 10, 1) 100%); }
.vault-card__thumb--c { background:
    radial-gradient(ellipse at 40% 60%, rgba(212, 114, 42, 0.4) 0%, transparent 50%),
    linear-gradient(135deg, rgba(26, 21, 32, 1) 0%, rgba(74, 28, 46, 0.5) 100%); }
.vault-card__thumb--d { background:
    radial-gradient(ellipse at 50% 30%, rgba(232, 220, 200, 0.35) 0%, transparent 45%),
    linear-gradient(180deg, rgba(26, 21, 32, 0.9) 0%, rgba(13, 11, 14, 1) 100%); }
.vault-card__thumb--e { background:
    radial-gradient(circle at 70% 60%, rgba(201, 169, 110, 0.4) 0%, transparent 40%),
    linear-gradient(-45deg, rgba(74, 28, 46, 0.6) 0%, rgba(8, 6, 10, 1) 100%); }
.vault-card__thumb--f { background:
    radial-gradient(ellipse at 30% 70%, rgba(212, 114, 42, 0.35) 0%, transparent 45%),
    radial-gradient(ellipse at 70% 30%, rgba(232, 200, 116, 0.25) 0%, transparent 40%),
    linear-gradient(180deg, rgba(26, 21, 32, 0.95) 0%, rgba(13, 11, 14, 1) 100%); }

.vault-card__caption {
    font-family: var(--f-label);
    font-weight: 300;
    font-size: 0.7rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--dust);
    text-align: center;
    padding: 4px 0 6px;
}

.vault__ledger {
    font-family: var(--f-italic);
    font-style: italic;
    font-size: 1rem;
    color: var(--antique-brass);
    text-align: center;
    margin-top: 30px;
    letter-spacing: 0.08em;
    line-height: 2;
}

/* =========================================================
   Colophon
   ========================================================= */
.colophon {
    position: relative;
    padding: 100px 24px 80px;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 14px;
    background: var(--obsidian);
    border-top: 1px solid rgba(201, 169, 110, 0.2);
}
.colophon__diamond {
    width: 14px; height: 14px;
    background: var(--antique-brass);
    transform: rotate(45deg);
    margin-bottom: 10px;
    box-shadow:
        -22px 0 0 -4px var(--antique-brass),
        22px 0 0 -4px var(--antique-brass);
}
.colophon__mark {
    font-family: var(--f-display);
    font-weight: 400;
    font-size: 1.6rem;
    letter-spacing: 0.28em;
    text-transform: uppercase;
    color: var(--warm-parchment);
}
.colophon__meta {
    font-family: var(--f-label);
    font-weight: 300;
    font-size: 0.72rem;
    letter-spacing: 0.36em;
    text-transform: uppercase;
    color: var(--dust);
}
.colophon__tiny {
    font-family: var(--f-italic);
    font-style: italic;
    font-size: 0.9rem;
    color: var(--antique-brass);
    opacity: 0.75;
}

/* =========================================================
   Responsive adjustments
   ========================================================= */
@media (max-width: 700px) {
    .portal__chevrons { display: none; }
    .vault__grid { grid-template-columns: repeat(2, 1fr); }
    .vault__quote { padding: 30px 20px; }
    .room { width: 92%; padding: 60px 18px; }
}