/* ================================================
   OKURAIRI.COM - Art Deco Vault Design System
   Color Palette:
     Deep Lacquer (BG):      #0D0B08
     Vault Gold (Primary):   #C9A84C
     Tarnished Brass (Sec):  #D4C5A0
     Aged Parchment (Text):  #B8A88A
     Archive Dust (Tertiary):#8A7D6B
     Ember Glow (Hover):     #8B4513
     Midnight Chamber (Alt): #14110D
     Ivory Crack (Rare):     #F5F0E1
     Amber-Black (Shadow):   #1A1510
   ================================================ */

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

html {
    scroll-snap-type: y mandatory;
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    background-color: #0D0B08;
    color: #B8A88A;
    font-family: 'Spectral', serif;
    font-weight: 300;
    font-size: clamp(0.95rem, 1.1vw, 1.15rem);
    line-height: 1.75;
    letter-spacing: 0.01em;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* --- Lacquer Grain Texture Overlay --- */
#grain-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 100;
    background:
        repeating-linear-gradient(
            45deg,
            #1A1510 0px,
            #1A1510 1px,
            transparent 1px,
            transparent 3px
        ),
        radial-gradient(
            ellipse at center,
            transparent 40%,
            #14110D 100%
        );
    opacity: 0.03;
}

/* --- Corner Filigree --- */
#corner-filigree {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 90;
}

.filigree-corner {
    position: absolute;
    width: 120px;
    height: 120px;
    opacity: 0.15;
    transition: opacity 0.6s cubic-bezier(0.25, 0.1, 0.25, 1.0);
}

.filigree-corner.pulse {
    opacity: 0.4;
}

.filigree-tl {
    top: 16px;
    left: 16px;
}

.filigree-tr {
    top: 16px;
    right: 16px;
}

.filigree-bl {
    bottom: 16px;
    left: 16px;
}

.filigree-br {
    bottom: 16px;
    right: 16px;
}

/* --- Pilaster Framing System --- */
.pilaster {
    position: fixed;
    top: 0;
    width: 1px;
    height: 100%;
    background: #C9A84C;
    opacity: 0.3;
    z-index: 80;
    pointer-events: none;
}

.pilaster::before,
.pilaster::after {
    content: '';
    position: absolute;
    left: -6px;
    width: 13px;
    height: 13px;
    border: 1px solid #C9A84C;
    opacity: 0.5;
    transform: rotate(45deg);
}

.pilaster::before {
    top: 25%;
}

.pilaster::after {
    top: 75%;
}

#pilaster-left {
    left: 20%;
}

#pilaster-right {
    right: 20%;
}

/* Pilaster ornamental nodes */
#pilaster-left::before,
#pilaster-left::after,
#pilaster-right::before,
#pilaster-right::after {
    background: #0D0B08;
}

/* --- Dust Canvas --- */
#dust-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
}

/* --- Vault Chamber (Sections) --- */
#vault-scroll {
    position: relative;
    z-index: 10;
}

.vault-chamber {
    height: 100svh;
    width: 100%;
    scroll-snap-align: start;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    background-color: #0D0B08;
}

.vault-chamber.chamber-alt {
    background-color: #14110D;
}

.chamber-content {
    position: relative;
    width: 60%;
    max-width: 800px;
    text-align: center;
    z-index: 5;
    padding: 2rem;
}

/* --- Vault Lock (Opening Animation) --- */
.vault-lock {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: min(300px, 60vw);
    height: min(300px, 60vw);
    z-index: 2;
}

.vault-lock svg {
    width: 100%;
    height: 100%;
}

.lock-ring {
    opacity: 0;
    transform-origin: 150px 150px;
}

.lock-notch {
    opacity: 0;
    transform-origin: 150px 150px;
}

/* --- Hero Title --- */
.hero-title {
    font-family: 'Poiret One', sans-serif;
    font-size: clamp(3rem, 10vw, 12rem);
    font-weight: 400;
    letter-spacing: 0.25em;
    line-height: 1.05;
    text-transform: uppercase;
    color: #C9A84C;
    opacity: 0;
    position: relative;
    z-index: 3;
}

.hero-title.revealed {
    opacity: 1;
    transition: opacity 0.8s cubic-bezier(0.25, 0.1, 0.25, 1.0);
}

.hero-tagline {
    font-family: 'Cinzel', serif;
    font-size: clamp(0.8rem, 2vw, 1.4rem);
    font-weight: 400;
    letter-spacing: 0.08em;
    color: #D4C5A0;
    opacity: 0;
    margin-top: 1.5rem;
    position: relative;
    z-index: 3;
}

.hero-tagline.revealed {
    opacity: 1;
    transition: opacity 0.6s cubic-bezier(0.25, 0.1, 0.25, 1.0) 0.3s;
}

/* --- Scroll Indicator --- */
.scroll-indicator {
    position: absolute;
    bottom: 3rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 3;
    opacity: 0;
}

.scroll-indicator.revealed {
    opacity: 1;
    animation: pulse-chevron 2s ease-in-out infinite;
}

.scroll-indicator svg {
    width: 28px;
    height: 16px;
}

@keyframes pulse-chevron {
    0%, 100% { opacity: 0.4; transform: translateX(-50%) translateY(0); }
    50% { opacity: 1; transform: translateX(-50%) translateY(6px); }
}

/* --- Catalog Reference Label --- */
.catalog-ref {
    display: block;
    font-family: 'DM Mono', monospace;
    font-weight: 300;
    font-size: 0.75rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: #8A7D6B;
    margin-bottom: 2rem;
}

/* --- Section Headings with Sunburst --- */
.radial-header {
    position: relative;
    display: inline-block;
    margin-bottom: 2.5rem;
}

.sunburst-header {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 400px;
    height: 400px;
    opacity: 0.15;
    pointer-events: none;
}

.section-heading {
    font-family: 'Poiret One', sans-serif;
    font-size: clamp(2rem, 5vw, 5rem);
    font-weight: 400;
    letter-spacing: 0.12em;
    line-height: 1.05;
    text-transform: uppercase;
    color: #C9A84C;
    position: relative;
    z-index: 2;
}

/* --- Sunburst Background (Slow Rotation) --- */
.sunburst-bg {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 140%;
    height: 140%;
    transform: translate(-50%, -50%);
    opacity: 0.04;
    pointer-events: none;
    z-index: 0;
}

/* --- Manifest Text --- */
.manifest-text {
    max-width: 600px;
    margin: 0 auto;
}

.manifest-line {
    font-family: 'Spectral', serif;
    font-weight: 300;
    font-size: clamp(0.95rem, 1.1vw, 1.15rem);
    line-height: 1.75;
    letter-spacing: 0.01em;
    color: #B8A88A;
    opacity: 0;
    transform: translateY(12px);
    margin-bottom: 1.2rem;
}

.manifest-line.visible {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.6s cubic-bezier(0.25, 0.1, 0.25, 1.0),
                transform 0.6s cubic-bezier(0.25, 0.1, 0.25, 1.0);
}

/* --- Catalog Card --- */
.catalog-card {
    position: relative;
    width: 70%;
    max-width: 640px;
    margin: 0 auto;
    padding: 2.5rem 3rem;
    border: 1px solid rgba(212, 197, 160, 0.3);
    box-shadow: inset 0 1px 4px rgba(13, 11, 8, 0.5);
    text-align: left;
    opacity: 0;
    clip-path: inset(50% 50% 50% 50%);
    transition: clip-path 0.6s cubic-bezier(0.25, 0.1, 0.25, 1.0),
                opacity 0.6s cubic-bezier(0.25, 0.1, 0.25, 1.0);
    overflow: hidden;
}

.catalog-card.visible {
    opacity: 1;
    clip-path: inset(0% 0% 0% 0%);
}

.catalog-card:hover {
    border-color: #C9A84C;
    transform: translateY(-2px);
    transition: border-color 0.4s ease,
                transform 0.4s ease,
                clip-path 0.6s cubic-bezier(0.25, 0.1, 0.25, 1.0),
                opacity 0.6s cubic-bezier(0.25, 0.1, 0.25, 1.0);
}

.card-ref {
    position: absolute;
    top: 0.75rem;
    left: 1rem;
    font-family: 'DM Mono', monospace;
    font-weight: 300;
    font-size: 0.7rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: #8A7D6B;
}

.card-tab {
    position: absolute;
    top: 0;
    right: 0;
    width: 0;
    height: 0;
    border-top: 28px solid #C9A84C;
    border-left: 28px solid transparent;
    opacity: 0.25;
}

.card-title {
    font-family: 'Cinzel', serif;
    font-size: clamp(1.2rem, 2.5vw, 2rem);
    font-weight: 400;
    letter-spacing: 0.08em;
    color: #D4C5A0;
    margin-bottom: 1.2rem;
    margin-top: 1.5rem;
}

.card-body {
    font-family: 'Spectral', serif;
    font-weight: 300;
    font-size: clamp(0.95rem, 1.1vw, 1.15rem);
    line-height: 1.75;
    letter-spacing: 0.01em;
    color: #B8A88A;
    margin-bottom: 1.5rem;
}

.card-meta {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.5rem;
    padding-top: 1rem;
    border-top: 1px solid rgba(212, 197, 160, 0.15);
}

.card-date,
.card-type {
    font-family: 'DM Mono', monospace;
    font-weight: 300;
    font-size: 0.7rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: #8A7D6B;
}

.card-sunburst-watermark {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 120%;
    height: 120%;
    transform: translate(-50%, -50%);
    opacity: 0.03;
    pointer-events: none;
    z-index: 0;
}

/* --- Deco Divider --- */
.deco-divider {
    position: relative;
    width: 60%;
    max-width: 400px;
    margin: 2.5rem auto 0;
    height: 1px;
    background: rgba(212, 197, 160, 0.2);
}

.divider-diamond {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) rotate(45deg);
    width: 8px;
    height: 8px;
    border: 1px solid #C9A84C;
    background: #0D0B08;
}

/* --- Registry --- */
.registry-list {
    width: 100%;
    max-width: 700px;
    margin: 0 auto;
}

.registry-entry {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.85rem 0;
    border-bottom: 1px solid rgba(212, 197, 160, 0.1);
    opacity: 0;
    transform: translateX(-30px);
    transition: opacity 0.5s cubic-bezier(0.25, 0.1, 0.25, 1.0),
                transform 0.5s cubic-bezier(0.25, 0.1, 0.25, 1.0);
    cursor: default;
}

.registry-entry.visible {
    opacity: 1;
    transform: translateX(0);
}

.registry-entry:hover {
    color: #C9A84C;
    text-shadow: 0 0 20px rgba(201, 168, 76, 0.3);
}

.registry-entry:hover .registry-code,
.registry-entry:hover .registry-title,
.registry-entry:hover .registry-date {
    color: #C9A84C;
    transition: color 0.4s ease;
}

.registry-code {
    font-family: 'DM Mono', monospace;
    font-weight: 300;
    font-size: 0.75rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: #8A7D6B;
    flex: 0 0 auto;
    width: 120px;
    text-align: left;
}

.registry-title {
    font-family: 'Cinzel', serif;
    font-weight: 400;
    font-size: clamp(0.85rem, 1.5vw, 1.1rem);
    letter-spacing: 0.08em;
    color: #D4C5A0;
    flex: 1;
    text-align: center;
    padding: 0 1rem;
}

.registry-date {
    font-family: 'DM Mono', monospace;
    font-weight: 300;
    font-size: 0.75rem;
    letter-spacing: 0.15em;
    color: #8A7D6B;
    flex: 0 0 auto;
    width: 80px;
    text-align: right;
}

/* --- Seal (Chamber VII) --- */
.seal-text {
    font-family: 'Spectral', serif;
    font-weight: 300;
    font-size: clamp(1rem, 1.5vw, 1.3rem);
    line-height: 1.9;
    letter-spacing: 0.02em;
    color: #B8A88A;
    opacity: 0;
    transition: opacity 1s cubic-bezier(0.25, 0.1, 0.25, 1.0);
}

.seal-text.visible {
    opacity: 1;
}

/* --- Keyhole Navigation --- */
#keyhole-nav {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 200;
}

#keyhole-btn {
    background: none;
    border: none;
    cursor: pointer;
    width: 36px;
    height: 52px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0.6;
    transition: opacity 0.4s ease;
}

#keyhole-btn:hover {
    opacity: 1;
}

#keyhole-btn svg {
    width: 36px;
    height: 52px;
}

.keyhole-menu-hidden {
    display: none;
}

.keyhole-menu-visible {
    display: block;
    position: absolute;
    bottom: 60px;
    left: 50%;
    transform: translateX(-50%);
    width: 280px;
    height: 160px;
}

.keyhole-item {
    position: absolute;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border: 1px solid #C9A84C;
    background: rgba(13, 11, 8, 0.9);
    color: #C9A84C;
    font-family: 'Cinzel', serif;
    font-weight: 700;
    font-size: 0.65rem;
    letter-spacing: 0.08em;
    text-decoration: none;
    text-transform: uppercase;
    border-radius: 50%;
    transition: background 0.3s ease, color 0.3s ease, transform 0.4s cubic-bezier(0.25, 0.1, 0.25, 1.0), opacity 0.4s ease;
    opacity: 0;
    transform: scale(0);
}

.keyhole-menu-visible .keyhole-item {
    opacity: 1;
    transform: scale(1);
}

.keyhole-item:hover {
    background: #C9A84C;
    color: #0D0B08;
}

/* Radial menu arc positioning (semicircle above keyhole) */
.keyhole-item[data-index="0"] {
    left: 0;
    bottom: 0;
    transition-delay: 0s;
}
.keyhole-item[data-index="1"] {
    left: 18px;
    bottom: 55px;
    transition-delay: 0.04s;
}
.keyhole-item[data-index="2"] {
    left: 62px;
    bottom: 100px;
    transition-delay: 0.08s;
}
.keyhole-item[data-index="3"] {
    left: 122px;
    bottom: 120px;
    transition-delay: 0.12s;
}
.keyhole-item[data-index="4"] {
    left: 182px;
    bottom: 100px;
    transition-delay: 0.16s;
}
.keyhole-item[data-index="5"] {
    left: 226px;
    bottom: 55px;
    transition-delay: 0.2s;
}
.keyhole-item[data-index="6"] {
    left: 244px;
    bottom: 0;
    transition-delay: 0.24s;
}

/* --- Vault Lock Animation Keyframes --- */
@keyframes ring-draw {
    from { stroke-dashoffset: 880; }
    to { stroke-dashoffset: 0; }
}

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

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

/* --- Reduced Motion --- */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    html {
        scroll-behavior: auto;
    }
    .manifest-line,
    .catalog-card,
    .registry-entry,
    .seal-text,
    .hero-title,
    .hero-tagline,
    .scroll-indicator {
        opacity: 1 !important;
        transform: none !important;
        clip-path: none !important;
    }
}

/* --- Responsive --- */
@media (max-width: 768px) {
    .chamber-content {
        width: 85%;
        padding: 1.5rem;
    }

    .catalog-card {
        width: 95%;
        padding: 2rem 1.5rem;
    }

    #pilaster-left { left: 5%; }
    #pilaster-right { right: 5%; }

    .filigree-corner {
        width: 60px;
        height: 60px;
    }

    .registry-code {
        width: 80px;
        font-size: 0.6rem;
    }

    .registry-date {
        width: 50px;
        font-size: 0.6rem;
    }

    .registry-title {
        font-size: clamp(0.7rem, 2vw, 0.9rem);
    }

    .keyhole-menu-visible {
        width: 220px;
        height: 130px;
    }

    .keyhole-item {
        width: 30px;
        height: 30px;
        font-size: 0.55rem;
    }

    .keyhole-item[data-index="0"] { left: 0; bottom: 0; }
    .keyhole-item[data-index="1"] { left: 12px; bottom: 42px; }
    .keyhole-item[data-index="2"] { left: 46px; bottom: 78px; }
    .keyhole-item[data-index="3"] { left: 95px; bottom: 95px; }
    .keyhole-item[data-index="4"] { left: 144px; bottom: 78px; }
    .keyhole-item[data-index="5"] { left: 178px; bottom: 42px; }
    .keyhole-item[data-index="6"] { left: 190px; bottom: 0; }
}

@media (max-width: 480px) {
    .chamber-content {
        width: 92%;
        padding: 1rem;
    }

    .catalog-card {
        width: 100%;
        padding: 1.5rem 1rem;
    }

    .card-meta {
        flex-direction: column;
    }
}