/* =========================================================================
   opensource.bid — The Auction House of Open Source
   Art Deco × Luxury Premium
   ========================================================================= */

:root {
    --velvet-black: #0a0a0a;
    --deep-gallery: #1a1a1a;
    --shadow-dark: #2a2a2a;
    --void: #2a2a2a;
    --auction-gold: #c9a55c;
    --champagne: #e8d5a3;
    --aged-gold: #8b7355;
    --ivory: #f5f0e8;
    --bidding-red: #cc3333;

    --font-display: 'Poiret One', 'Inter', sans-serif;
    --font-body: 'Cormorant Garamond', 'Cormorant', Georgia, serif;
    --font-meta: 'Poiret One', 'Inter', sans-serif;
    --font-utility: 'Inter', 'space', system-ui, sans-serif;
}

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

html {
    scroll-behavior: smooth;
}

body {
    background: var(--velvet-black);
    color: var(--ivory);
    font-family: var(--font-body);
    font-size: 1.05rem;
    line-height: 1.8;
    font-weight: 400;
    overflow-x: hidden;
    position: relative;
    min-height: 100vh;
}

/* Subtle gold-leaf shimmer overlay (CSS noise dots) */
.gold-leaf-overlay {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 1;
    background-image:
        radial-gradient(circle at 12% 18%, rgba(201, 165, 92, 0.04) 0.6px, transparent 1px),
        radial-gradient(circle at 73% 41%, rgba(201, 165, 92, 0.035) 0.5px, transparent 1px),
        radial-gradient(circle at 45% 78%, rgba(201, 165, 92, 0.03) 0.7px, transparent 1px),
        radial-gradient(circle at 88% 88%, rgba(201, 165, 92, 0.04) 0.5px, transparent 1px),
        radial-gradient(circle at 22% 62%, rgba(201, 165, 92, 0.025) 0.6px, transparent 1px);
    background-size: 220px 220px, 180px 180px, 260px 260px, 200px 200px, 240px 240px;
    mix-blend-mode: screen;
    opacity: 0.6;
    animation: shimmer 18s ease-in-out infinite alternate;
}

@keyframes shimmer {
    0%   { opacity: 0.45; transform: translateY(0); }
    100% { opacity: 0.75; transform: translateY(-6px); }
}

/* =========================================================================
   HERO — The Auction House
   ========================================================================= */

.hero {
    position: relative;
    min-height: 100vh;
    background: var(--velvet-black);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 80px 24px 40px;
    overflow: hidden;
    z-index: 2;
}

.hero::before,
.hero::after {
    content: '';
    position: absolute;
    width: 1px;
    background: linear-gradient(to bottom, transparent, var(--auction-gold), transparent);
    top: 8%;
    bottom: 8%;
    opacity: 0.35;
    z-index: 1;
}
.hero::before { left: 36px; }
.hero::after  { right: 36px; }

.hero-inner {
    position: relative;
    width: 100%;
    max-width: 720px;
    display: flex;
    flex-direction: column;
    align-items: center;
    z-index: 3;
}

.lot-marker {
    font-family: var(--font-meta);
    font-size: 0.85rem;
    letter-spacing: 0.45em;
    color: var(--auction-gold);
    margin-bottom: 32px;
    text-transform: uppercase;
    opacity: 0;
    animation: fade-in 1.5s 0.1s ease-out forwards;
}

.lot-marker.top {
    position: relative;
}

.lot-marker.top::before,
.lot-marker.top::after {
    content: '';
    display: inline-block;
    width: 36px;
    height: 1px;
    background: var(--auction-gold);
    vertical-align: middle;
    margin: 0 18px;
}

/* Sunburst — radiating gold lines behind the hero frame */
.sunburst {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 1100px;
    height: 1100px;
    transform: translate(-50%, -50%);
    pointer-events: none;
    z-index: 0;
    opacity: 0;
    animation: sunburst-rise 2.4s 0.6s ease-out forwards;
}

.sunburst span {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        var(--angle),
        transparent 48%,
        rgba(201, 165, 92, 0.18) 49%,
        rgba(201, 165, 92, 0.18) 51%,
        transparent 52%
    );
    mix-blend-mode: screen;
}

@keyframes sunburst-rise {
    0%   { opacity: 0; transform: translate(-50%, -50%) scale(0.85) rotate(-6deg); }
    100% { opacity: 1; transform: translate(-50%, -50%) scale(1) rotate(0deg); }
}

/* Nested Art Deco frames */
.frame-outer {
    border: 1px solid var(--auction-gold);
    padding: 20px;
    background: rgba(10, 10, 10, 0.8);
    box-shadow:
        0 0 0 6px rgba(10, 10, 10, 0.85),
        0 0 80px rgba(201, 165, 92, 0.08);
    position: relative;
    opacity: 0;
    animation: fade-in 1.5s 0.3s ease-out forwards;
}

.frame-outer::before,
.frame-outer::after {
    content: '';
    position: absolute;
    width: 14px;
    height: 14px;
    border: 1px solid var(--auction-gold);
}
.frame-outer::before { top: -7px;    left: -7px;    border-right: none; border-bottom: none; }
.frame-outer::after  { bottom: -7px; right: -7px;   border-left: none;  border-top: none; }

.frame-mid {
    border: 2px solid var(--aged-gold);
    padding: 20px;
    position: relative;
}

.frame-mid::before,
.frame-mid::after {
    content: '';
    position: absolute;
    width: 10px;
    height: 10px;
    border: 1px solid var(--aged-gold);
}
.frame-mid::before { top: -5px;    right: -5px; border-left: none; border-bottom: none; }
.frame-mid::after  { bottom: -5px; left: -5px;  border-right: none; border-top: none; }

.frame-inner {
    border: 3px solid var(--auction-gold);
    padding: 56px 48px;
    text-align: center;
    background: var(--velvet-black);
    position: relative;
}

.hero-eyebrow {
    font-family: var(--font-meta);
    font-size: 0.72rem;
    letter-spacing: 0.5em;
    color: var(--aged-gold);
    margin-bottom: 28px;
    text-transform: uppercase;
}

.hero-title {
    font-family: var(--font-display);
    font-weight: 400;
    font-size: clamp(1.8rem, 5vw, 3.5rem);
    letter-spacing: 0.2em;
    color: var(--ivory);
    text-transform: lowercase;
    line-height: 1.1;
    margin: 0;
    animation: tracking-in 1.8s 0.6s ease-out forwards;
    letter-spacing: 0.3em;
    opacity: 0;
}

@keyframes tracking-in {
    0%   { letter-spacing: 0.6em;  opacity: 0; }
    60%  { opacity: 1; }
    100% { letter-spacing: 0.2em;  opacity: 1; }
}

.hero-rule {
    width: 80px;
    height: 1px;
    background: var(--auction-gold);
    margin: 28px auto 24px;
    position: relative;
    opacity: 0;
    animation: fade-in 1.2s 1.4s ease-out forwards;
}

.hero-rule::before,
.hero-rule::after {
    content: '';
    position: absolute;
    top: 50%;
    width: 5px;
    height: 5px;
    background: var(--auction-gold);
    transform: translateY(-50%) rotate(45deg);
}
.hero-rule::before { left: -10px; }
.hero-rule::after  { right: -10px; }

.hero-subtitle {
    font-family: var(--font-body);
    font-style: italic;
    font-weight: 400;
    font-size: 1.05rem;
    color: var(--champagne);
    letter-spacing: 0.04em;
    opacity: 0;
    animation: fade-in 1.2s 1.6s ease-out forwards;
}

.hero-meta {
    margin-top: 48px;
    display: flex;
    align-items: center;
    gap: 18px;
    opacity: 0;
    animation: fade-in 1.4s 1.8s ease-out forwards;
}

.hero-meta-line {
    width: 60px;
    height: 1px;
    background: var(--auction-gold);
    opacity: 0.6;
}

.hero-date {
    font-family: var(--font-meta);
    font-size: 0.78rem;
    letter-spacing: 0.4em;
    color: var(--auction-gold);
    text-transform: uppercase;
}

/* Scroll cue */
.scroll-cue {
    margin-top: 72px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 14px;
    opacity: 0;
    animation: fade-in 1.4s 2.2s ease-out forwards;
}

.scroll-cue span {
    font-family: var(--font-meta);
    font-size: 0.7rem;
    letter-spacing: 0.5em;
    color: var(--aged-gold);
    text-transform: uppercase;
}

.scroll-cue-line {
    width: 1px;
    height: 60px;
    background: linear-gradient(to bottom, var(--auction-gold), transparent);
    animation: scroll-pulse 2.4s ease-in-out infinite;
}

@keyframes scroll-pulse {
    0%, 100% { opacity: 0.4; transform: scaleY(1); }
    50%      { opacity: 1;   transform: scaleY(1.2); }
}

/* =========================================================================
   CATALOG INTRO
   ========================================================================= */

.catalog-intro {
    max-width: 600px;
    margin: 140px auto 0;
    padding: 0 24px;
    text-align: center;
    position: relative;
    z-index: 2;
}

.diamond-badge {
    width: 28px;
    height: 28px;
    border: 1px solid var(--auction-gold);
    transform: rotate(45deg);
    margin: 0 auto 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.diamond-badge span {
    transform: rotate(-45deg);
    font-family: var(--font-meta);
    font-size: 0.78rem;
    letter-spacing: 0.1em;
    color: var(--auction-gold);
}

.catalog-intro-text {
    font-family: var(--font-body);
    font-size: 1.18rem;
    line-height: 1.85;
    color: var(--ivory);
    font-weight: 300;
}

.catalog-intro-text em {
    color: var(--champagne);
    font-style: italic;
}

/* =========================================================================
   LOTS — auction catalog sections
   ========================================================================= */

.lot {
    max-width: 600px;
    margin: 0 auto;
    padding: 200px 24px 0;
    position: relative;
    z-index: 2;
}

.lot::before {
    content: '';
    display: block;
    width: 60px;
    height: 1px;
    background: var(--auction-gold);
    margin: 0 auto 40px;
}

.lot-header {
    text-align: center;
    margin-bottom: 44px;
    position: relative;
}

.lot-header::before {
    content: '';
    position: absolute;
    top: -28px;
    left: 50%;
    width: 22px;
    height: 22px;
    border: 1px solid var(--auction-gold);
    transform: translateX(-50%) rotate(45deg);
    background: var(--velvet-black);
}

.lot-number {
    font-family: var(--font-meta);
    font-size: 0.78rem;
    letter-spacing: 0.4em;
    color: var(--auction-gold);
    margin-bottom: 24px;
    margin-top: 16px;
    text-transform: uppercase;
}

.lot-title {
    font-family: var(--font-display);
    font-weight: 400;
    font-size: clamp(1.5rem, 3.5vw, 2.2rem);
    letter-spacing: 0.08em;
    color: var(--ivory);
    line-height: 1.25;
    margin-bottom: 18px;
}

.lot-attribution {
    font-family: var(--font-body);
    font-style: italic;
    font-size: 0.95rem;
    color: var(--aged-gold);
    letter-spacing: 0.02em;
}

.lot-body {
    text-align: left;
    margin-bottom: 48px;
}

.lot-body p {
    font-family: var(--font-body);
    font-size: 1.08rem;
    line-height: 1.85;
    color: var(--ivory);
    margin-bottom: 18px;
    font-weight: 400;
}

.lot-body em {
    color: var(--champagne);
    font-style: italic;
}

.lot-body code {
    font-family: 'Inter', 'Courier New', monospace;
    font-size: 0.9rem;
    color: var(--auction-gold);
    background: var(--deep-gallery);
    padding: 1px 8px;
    border: 1px solid var(--shadow-dark);
    letter-spacing: 0.04em;
}

.lot-meta {
    font-family: var(--font-meta) !important;
    font-size: 0.74rem !important;
    letter-spacing: 0.25em;
    color: var(--aged-gold);
    text-transform: uppercase;
    line-height: 1.6 !important;
    margin-top: 28px;
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid var(--shadow-dark);
}

.hash {
    color: var(--auction-gold);
    font-family: 'Inter', monospace;
    font-size: 0.78rem;
}

/* Bid block */
.bid-block {
    background: var(--deep-gallery);
    border: 1px solid var(--shadow-dark);
    padding: 36px 32px 32px;
    text-align: center;
    position: relative;
}

.bid-block::before,
.bid-block::after {
    content: '';
    position: absolute;
    width: 12px;
    height: 12px;
    border: 1px solid var(--auction-gold);
}
.bid-block::before { top: -1px; left: -1px;     border-right: none; border-bottom: none; }
.bid-block::after  { bottom: -1px; right: -1px; border-left: none;  border-top: none; }

.bid-label {
    font-family: var(--font-meta);
    font-size: 0.72rem;
    letter-spacing: 0.5em;
    color: var(--aged-gold);
    text-transform: uppercase;
    margin-bottom: 16px;
}

.bid-amount {
    font-family: var(--font-display);
    font-weight: 400;
    font-size: clamp(2rem, 4.5vw, 2.8rem);
    letter-spacing: 0.08em;
    color: var(--champagne);
    margin-bottom: 20px;
    transition: color 0.4s ease;
}

.bid-status {
    font-family: var(--font-meta);
    font-size: 0.7rem;
    letter-spacing: 0.42em;
    color: var(--auction-gold);
    text-transform: uppercase;
    display: inline-flex;
    align-items: center;
    gap: 12px;
}

.bid-status.urgent {
    color: var(--bidding-red);
}

.bid-pulse {
    width: 7px;
    height: 7px;
    background: var(--auction-gold);
    border-radius: 50%;
    transform: rotate(45deg);
    border-radius: 0;
    animation: bid-pulse 1.6s ease-in-out infinite;
}

.bid-status.urgent .bid-pulse {
    background: var(--bidding-red);
    box-shadow: 0 0 12px var(--bidding-red);
}

@keyframes bid-pulse {
    0%, 100% { opacity: 0.45; transform: rotate(45deg) scale(0.85); }
    50%      { opacity: 1;    transform: rotate(45deg) scale(1.15); }
}

/* =========================================================================
   TERMS / CONDITIONS OF SALE
   ========================================================================= */

.terms {
    max-width: 600px;
    margin: 200px auto 0;
    padding: 0 24px;
    text-align: center;
    position: relative;
    z-index: 2;
}

.terms-title {
    font-family: var(--font-display);
    font-weight: 400;
    font-size: 1.4rem;
    letter-spacing: 0.3em;
    color: var(--auction-gold);
    text-transform: uppercase;
    margin-bottom: 32px;
}

.terms-text {
    font-family: var(--font-body);
    font-style: italic;
    font-size: 1rem;
    line-height: 1.85;
    color: var(--ivory);
    font-weight: 400;
}

.terms-divider {
    width: 1px;
    height: 50px;
    background: var(--auction-gold);
    margin: 48px auto 24px;
    opacity: 0.6;
}

.terms-flourish {
    font-family: var(--font-body);
    font-style: italic;
    font-size: 0.95rem;
    color: var(--aged-gold);
    letter-spacing: 0.05em;
}

/* =========================================================================
   GAVEL CLOSE / FOOTER
   ========================================================================= */

.gavel-close {
    margin-top: 200px;
    padding: 140px 24px 100px;
    background: var(--velvet-black);
    border-top: 1px solid var(--shadow-dark);
    position: relative;
    overflow: hidden;
    text-align: center;
    z-index: 2;
}

.gavel-sunburst {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 1300px;
    height: 1300px;
    transform: translate(-50%, -50%);
    pointer-events: none;
    z-index: 0;
}

.gavel-sunburst span {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        var(--angle),
        transparent 47%,
        rgba(201, 165, 92, 0.14) 49%,
        rgba(201, 165, 92, 0.14) 51%,
        transparent 53%
    );
    mix-blend-mode: screen;
    transition: opacity 0.6s ease;
}

.sold-stamp {
    position: relative;
    z-index: 2;
}

.sold-eyebrow {
    font-family: var(--font-body);
    font-style: italic;
    font-size: 0.95rem;
    color: var(--aged-gold);
    letter-spacing: 0.1em;
    margin-bottom: 36px;
}

.sold-text {
    font-family: var(--font-display);
    font-weight: 400;
    font-size: clamp(4.5rem, 14vw, 9rem);
    letter-spacing: 0.4em;
    color: var(--auction-gold);
    text-transform: uppercase;
    line-height: 1;
    text-shadow:
        0 0 40px rgba(201, 165, 92, 0.18),
        0 0 80px rgba(201, 165, 92, 0.08);
    transition: text-shadow 0.6s ease, color 0.6s ease;
    padding-left: 0.4em; /* compensate trailing letter-spacing */
}

.sold-text.struck {
    color: var(--champagne);
    text-shadow:
        0 0 50px rgba(232, 213, 163, 0.55),
        0 0 110px rgba(201, 165, 92, 0.25);
}

.sold-rule {
    width: 120px;
    height: 1px;
    background: var(--auction-gold);
    margin: 36px auto 24px;
    position: relative;
}

.sold-rule::before,
.sold-rule::after {
    content: '';
    position: absolute;
    top: 50%;
    width: 6px;
    height: 6px;
    background: var(--auction-gold);
    transform: translateY(-50%) rotate(45deg);
}
.sold-rule::before { left: -12px; }
.sold-rule::after  { right: -12px; }

.sold-meta {
    font-family: var(--font-body);
    font-style: italic;
    font-size: 1rem;
    color: var(--ivory);
    letter-spacing: 0.04em;
}

.footer-meta {
    position: relative;
    z-index: 2;
    margin-top: 80px;
    font-family: var(--font-meta);
    font-size: 0.72rem;
    letter-spacing: 0.5em;
    color: var(--aged-gold);
    text-transform: uppercase;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 14px;
    flex-wrap: wrap;
}

.footer-dot {
    color: var(--auction-gold);
}

/* =========================================================================
   ANIMATIONS — fade in / reveal
   ========================================================================= */

@keyframes fade-in {
    0%   { opacity: 0; transform: translateY(12px); }
    100% { opacity: 1; transform: translateY(0); }
}

.reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 1.5s ease-out, transform 1.5s ease-out;
}

.reveal.in-view {
    opacity: 1;
    transform: translateY(0);
}

.reveal-letter-spacing {
    letter-spacing: 0.32em;
    transition: letter-spacing 1.6s ease-out;
}

.reveal-letter-spacing.in-view {
    letter-spacing: 0.08em;
}

/* =========================================================================
   RESPONSIVE
   ========================================================================= */

@media (max-width: 720px) {
    .hero { padding: 60px 18px 28px; }
    .hero::before { left: 18px; }
    .hero::after  { right: 18px; }

    .frame-inner {
        padding: 36px 24px;
    }

    .lot {
        padding-top: 140px;
    }

    .terms { margin-top: 140px; }

    .gavel-close { margin-top: 140px; padding: 100px 18px 80px; }

    .sold-text {
        letter-spacing: 0.25em;
    }

    .lot-marker.top::before,
    .lot-marker.top::after {
        width: 18px;
        margin: 0 10px;
    }

    .footer-meta { gap: 8px; font-size: 0.65rem; letter-spacing: 0.35em; }
}

@media (max-width: 480px) {
    .hero-eyebrow { font-size: 0.62rem; letter-spacing: 0.35em; }
    .hero-meta { flex-direction: column; gap: 10px; }
    .hero-meta-line { width: 80px; }
}