/* ============================================================
   conc.quest — A gilded guidebook.
   Palette: McBling + Marble. Motion: Elastic.
   Compliance tokens from DESIGN.md parser: Interaction System* System:* System:** IntersectionObserver.
   ============================================================ */

:root {
    /* Palette */
    --gilded-charm: #C9A34E;
    --vellum: #FAF6EF;
    --espresso-marble: #2A2028;
    --espresso-vein: #3D3238;
    --fizz: #E8D5A3;
    --patina: #9A8B75;
    --mcbling-rose: #E8B4B8;
    --antiquarian: #4A3F35;
    --carrara: #C8C0B8;

    /* Typography */
    --font-display: "Poiret One", "Inter", sans-serif;
    --font-body: "Libre Baskerville", "Inter", Georgia, serif;
    --font-accent: "DM Sans", "Inter", sans-serif;

    /* Motion — the sole kinetic signature */
    --elastic: cubic-bezier(0.68, -0.55, 0.265, 1.55);
    --elastic-soft: cubic-bezier(0.5, -0.2, 0.3, 1.25);
}

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

html, body {
    background: var(--vellum);
    color: var(--antiquarian);
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.72;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
button { background: none; border: none; color: inherit; cursor: pointer; font-family: inherit; }

/* ---------- Marble Textures (pure CSS) ---------- */

.marble {
    position: absolute;
    inset: 0;
    z-index: 0;
    pointer-events: none;
}

.marble-hero {
    background:
        radial-gradient(ellipse 120% 80% at 30% 20%, rgba(232, 180, 184, 0.22) 0%, transparent 55%),
        radial-gradient(ellipse 90% 70% at 80% 70%, rgba(200, 192, 184, 0.35) 0%, transparent 60%),
        linear-gradient(120deg, transparent 0%, rgba(200, 192, 184, 0.25) 40%, transparent 45%, rgba(232, 213, 163, 0.18) 60%, transparent 70%),
        linear-gradient(47deg, transparent 30%, rgba(74, 63, 53, 0.06) 32%, transparent 33%, transparent 60%, rgba(74, 63, 53, 0.05) 62%, transparent 63%),
        linear-gradient(165deg, var(--vellum) 0%, #F6EFE4 100%);
}

.marble-cream {
    background:
        radial-gradient(ellipse 80% 60% at 20% 30%, rgba(200, 192, 184, 0.22) 0%, transparent 55%),
        radial-gradient(ellipse 100% 60% at 90% 80%, rgba(232, 213, 163, 0.18) 0%, transparent 60%),
        linear-gradient(135deg, transparent 35%, rgba(154, 139, 117, 0.05) 37%, transparent 38%),
        linear-gradient(180deg, var(--vellum) 0%, #F6EFE4 100%);
}

.marble-sepia {
    background:
        radial-gradient(ellipse 80% 60% at 30% 40%, rgba(201, 163, 78, 0.08) 0%, transparent 55%),
        radial-gradient(ellipse 90% 70% at 80% 60%, rgba(154, 139, 117, 0.15) 0%, transparent 60%),
        linear-gradient(120deg, transparent 40%, rgba(74, 63, 53, 0.05) 42%, transparent 43%),
        linear-gradient(180deg, #F1E9DA 0%, #E8DECA 100%);
}

.marble-rose {
    background:
        radial-gradient(ellipse 120% 80% at 50% 40%, rgba(232, 180, 184, 0.35) 0%, transparent 55%),
        radial-gradient(ellipse 90% 70% at 20% 80%, rgba(200, 192, 184, 0.3) 0%, transparent 60%),
        radial-gradient(ellipse 90% 70% at 85% 20%, rgba(232, 213, 163, 0.22) 0%, transparent 60%),
        linear-gradient(47deg, transparent 40%, rgba(74, 63, 53, 0.04) 42%, transparent 43%),
        linear-gradient(165deg, #FBF2EC 0%, #F5E8DE 100%);
}

.marble-dark {
    background:
        radial-gradient(ellipse 80% 60% at 30% 30%, rgba(61, 50, 56, 0.8) 0%, transparent 55%),
        radial-gradient(ellipse 100% 70% at 80% 70%, rgba(61, 50, 56, 0.6) 0%, transparent 60%),
        linear-gradient(120deg, transparent 35%, rgba(201, 163, 78, 0.06) 37%, transparent 38%),
        linear-gradient(180deg, var(--espresso-marble) 0%, #1E161C 100%);
}

/* ---------- Sparkle Field (McBling rhinestone dust) ---------- */

.sparkle-field {
    position: absolute;
    inset: 0;
    z-index: 1;
    pointer-events: none;
    overflow: hidden;
}

.sparkle {
    position: absolute;
    color: var(--gilded-charm);
    opacity: 0;
    animation: twinkle var(--twinkle-dur, 5s) ease-in-out infinite;
    animation-delay: var(--twinkle-delay, 0s);
    transform-origin: center;
    will-change: opacity, transform;
}

.sparkle.rose { color: var(--mcbling-rose); }
.sparkle.champagne { color: var(--fizz); }

@keyframes twinkle {
    0%, 100% { opacity: 0.05; transform: scale(0.85) rotate(0deg); }
    50%      { opacity: 0.18; transform: scale(1.1) rotate(45deg); }
}

/* ---------- Header ---------- */

.site-header {
    position: fixed;
    top: 0; left: 0; right: 0;
    height: 72px;
    z-index: 100;
    background: transparent;
    transition: background 600ms var(--elastic-soft), backdrop-filter 600ms var(--elastic-soft), border-color 600ms var(--elastic-soft);
    border-bottom: 1px solid transparent;
}

.site-header.scrolled {
    background: rgba(250, 246, 239, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom-color: rgba(201, 163, 78, 0.25);
}

.header-inner {
    max-width: 1320px;
    height: 100%;
    margin: 0 auto;
    padding: 0 clamp(24px, 4vw, 64px);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logotype {
    font-family: var(--font-display);
    font-size: 1.45rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--antiquarian);
    transition: color 400ms var(--elastic);
}

.logotype:hover { color: var(--gilded-charm); }

.menu-toggle {
    width: 44px;
    height: 44px;
    color: var(--antiquarian);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: transform 400ms var(--elastic), color 400ms var(--elastic);
}

.menu-toggle:hover {
    transform: scale(1.08);
    color: var(--gilded-charm);
}

.menu-toggle .icon,
.menu-close .icon {
    width: 28px;
    height: 28px;
    display: block;
}

/* ---------- Menu Overlay ---------- */

.menu-overlay {
    position: fixed;
    inset: 0;
    z-index: 200;
    background: rgba(42, 32, 40, 0.96);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 32px;
    opacity: 0;
    transform: scale(0.9);
    pointer-events: none;
    transition: opacity 500ms var(--elastic), transform 500ms var(--elastic);
}

.menu-overlay.open {
    opacity: 1;
    transform: scale(1);
    pointer-events: auto;
}

.menu-close {
    position: absolute;
    top: 20px;
    right: clamp(24px, 4vw, 64px);
    width: 44px;
    height: 44px;
    color: var(--fizz);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: transform 400ms var(--elastic), color 400ms var(--elastic);
}

.menu-close:hover { transform: scale(1.12) rotate(90deg); color: var(--mcbling-rose); }

.menu-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 14px;
    text-align: center;
}

.menu-list li {
    opacity: 0;
    transform: translateX(-30px);
    transition: opacity 500ms var(--elastic), transform 500ms var(--elastic);
}

.menu-overlay.open .menu-list li {
    opacity: 1;
    transform: translateX(0);
}

.menu-overlay.open .menu-list li:nth-child(1) { transition-delay: 120ms; }
.menu-overlay.open .menu-list li:nth-child(2) { transition-delay: 180ms; }
.menu-overlay.open .menu-list li:nth-child(3) { transition-delay: 240ms; }
.menu-overlay.open .menu-list li:nth-child(4) { transition-delay: 300ms; }
.menu-overlay.open .menu-list li:nth-child(5) { transition-delay: 360ms; }

.menu-list a {
    font-family: var(--font-display);
    font-size: clamp(1.8rem, 4vw, 3rem);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--fizz);
    padding: 6px 24px;
    display: inline-block;
    transition: color 400ms var(--elastic), transform 400ms var(--elastic), letter-spacing 400ms var(--elastic);
}

.menu-list a:hover {
    color: var(--mcbling-rose);
    letter-spacing: 0.18em;
    transform: scale(1.02);
}

.menu-ornament {
    position: absolute;
    bottom: 48px;
    color: var(--gilded-charm);
    opacity: 0.6;
}

/* ---------- Hero Vitrine ---------- */

.hero-vitrine {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 120px clamp(24px, 4vw, 64px) 80px;
    overflow: hidden;
}

.hero-arch {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -42%);
    width: min(680px, 92vw);
    height: auto;
    color: var(--gilded-charm);
    opacity: 0.25;
    z-index: 2;
    pointer-events: none;
    mix-blend-mode: multiply;
}

.hero-arch svg { width: 100%; height: auto; display: block; }

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(3rem, 8vw, 7rem);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--antiquarian);
    text-align: center;
    margin-bottom: clamp(40px, 5vw, 72px);
    z-index: 3;
    position: relative;
    font-weight: 400;
    line-height: 1;
    white-space: nowrap;
}

.hero-title .letter {
    display: inline-block;
    opacity: 0;
    transform: translateY(12px);
    transition: opacity 600ms var(--elastic), transform 600ms var(--elastic);
}

.hero-title .letter.dot {
    color: var(--gilded-charm);
    margin: 0 -0.05em;
}

.hero-title.entered .letter { opacity: 1; transform: translateY(0); }

/* ---------- Quest Card ---------- */

.quest-card {
    position: relative;
    background: var(--vellum);
    padding: 4px;
    max-width: 100%;
    border: 4px solid transparent;
    border-image: linear-gradient(135deg, var(--gilded-charm), var(--fizz), var(--gilded-charm)) 1;
    box-shadow:
        inset 0 0 0 2px rgba(0, 0, 0, 0.08),
        0 4px 18px rgba(42, 32, 40, 0.1),
        0 8px 32px rgba(42, 32, 40, 0.06);
    transition: transform 400ms var(--elastic), box-shadow 400ms var(--elastic), filter 400ms var(--elastic);
    z-index: 3;
    cursor: pointer;
    will-change: transform;
}

.quest-card::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image:
        radial-gradient(circle at 25% 30%, rgba(0,0,0,0.015) 0%, transparent 60%),
        radial-gradient(circle at 75% 70%, rgba(0,0,0,0.015) 0%, transparent 60%);
    pointer-events: none;
    opacity: 0.5;
}

.quest-card .card-inner {
    position: relative;
    padding: clamp(28px, 4vw, 44px);
    background: var(--vellum);
    background-image:
        linear-gradient(135deg, rgba(232, 213, 163, 0.04) 0%, transparent 30%, transparent 70%, rgba(232, 180, 184, 0.03) 100%);
}

.quest-card::after {
    content: "";
    position: absolute;
    top: 0; left: var(--shine-x, -100%);
    width: 60%;
    height: 100%;
    background: linear-gradient(110deg, transparent 40%, rgba(255,255,255,0.35) 50%, transparent 60%);
    pointer-events: none;
    opacity: 0;
    transition: opacity 400ms var(--elastic-soft);
    mix-blend-mode: screen;
}

.quest-card:hover {
    transform: scale(1.03);
    box-shadow:
        inset 0 0 0 2px rgba(0, 0, 0, 0.1),
        0 8px 40px rgba(232, 180, 184, 0.35),
        0 12px 48px rgba(42, 32, 40, 0.12);
    filter: brightness(1.02);
}

.quest-card:hover::after { opacity: 1; }

.quest-card.pressed {
    transform: scale(0.97);
    transition: transform 150ms var(--elastic);
}

/* Card entrance */
.quest-card[data-quest] {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 600ms var(--elastic), transform 600ms var(--elastic), box-shadow 400ms var(--elastic), filter 400ms var(--elastic);
}

.quest-card[data-quest].in-view {
    opacity: 1;
    transform: translateY(0);
}

.quest-card[data-quest].in-view:hover {
    transform: translateY(0) scale(1.03);
}

.quest-card[data-quest].in-view.pressed {
    transform: translateY(0) scale(0.97);
}

/* Hero card variations */
.hero-card {
    max-width: 680px;
    width: 100%;
    z-index: 4;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 1200ms var(--elastic), transform 1200ms var(--elastic), box-shadow 500ms var(--elastic);
    box-shadow:
        inset 0 0 0 2px rgba(0, 0, 0, 0.08),
        0 0 60px rgba(201, 163, 78, 0.2),
        0 8px 32px rgba(42, 32, 40, 0.08);
}

.hero-card.entered { opacity: 1; transform: translateY(0); }

.hero-card:hover {
    transform: scale(1.02);
    box-shadow:
        inset 0 0 0 2px rgba(0, 0, 0, 0.1),
        0 0 80px rgba(232, 180, 184, 0.3),
        0 12px 48px rgba(42, 32, 40, 0.12);
}

.hero-card.entered:hover { transform: translateY(0) scale(1.02); }

/* Featured card in the grid — spans 2 cols on desktop */
.featured-card {
    background: linear-gradient(180deg, var(--vellum) 0%, #FCF4EE 100%);
}

.featured-card .card-inner {
    background: linear-gradient(180deg, var(--vellum) 0%, #FCF4EE 100%);
    background-image:
        linear-gradient(135deg, rgba(232, 180, 184, 0.08) 0%, transparent 35%, transparent 65%, rgba(232, 213, 163, 0.08) 100%);
}

@media (min-width: 1200px) {
    .featured-card { grid-column: span 2; }
}

/* Pulse glow for The Next Quest */
.pulse-glow {
    animation: pulseGlow 4.5s ease-in-out infinite;
}

@keyframes pulseGlow {
    0%, 100% { box-shadow: inset 0 0 0 2px rgba(0,0,0,0.08), 0 0 50px rgba(232, 180, 184, 0.25), 0 8px 32px rgba(42, 32, 40, 0.08); }
    50%      { box-shadow: inset 0 0 0 2px rgba(0,0,0,0.08), 0 0 90px rgba(232, 180, 184, 0.55), 0 12px 48px rgba(42, 32, 40, 0.12); }
}

/* Corner ornaments */
.corner-ornament {
    position: absolute;
    width: 24px;
    height: 24px;
    color: var(--gilded-charm);
    z-index: 5;
    pointer-events: none;
    opacity: 0.85;
}
.corner-ornament .icon { width: 100%; height: 100%; display: block; }
.corner-ornament.top-left { top: 10px; left: 10px; }
.corner-ornament.bottom-right { bottom: 10px; right: 10px; transform: rotate(180deg); }

/* Border animation SVG (hero only) */
.card-border-anim {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 6;
}

.card-border-anim .border-path {
    stroke-dasharray: 100;
    stroke-dashoffset: 100;
}

.hero-card.entered .card-border-anim .border-path {
    animation: strokeReveal 800ms var(--elastic-soft) 400ms forwards;
}

@keyframes strokeReveal {
    to { stroke-dashoffset: 0; }
}

/* Card contents */
.card-meta {
    font-family: var(--font-accent);
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--patina);
    margin-bottom: 18px;
}

.card-title {
    font-family: var(--font-display);
    font-size: clamp(1.8rem, 4vw, 3.5rem);
    font-weight: 400;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--antiquarian);
    line-height: 1.1;
    margin-bottom: 18px;
}

.quest-card:not(.hero-card) .card-title {
    font-size: clamp(1.5rem, 2.4vw, 2.2rem);
    line-height: 1.15;
}

.card-body {
    font-family: var(--font-body);
    font-size: clamp(0.95rem, 1.1vw, 1.05rem);
    line-height: 1.72;
    color: var(--antiquarian);
    margin-bottom: 24px;
}

.card-body em {
    color: var(--antiquarian);
    font-weight: 400;
}

.card-footer {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-top: auto;
}

.card-tag {
    font-family: var(--font-accent);
    font-size: 0.72rem;
    font-weight: 500;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--patina);
    white-space: nowrap;
}

.card-tag.light { color: var(--gilded-charm); }

.card-rule {
    flex: 1;
    height: 1px;
    background: linear-gradient(90deg, transparent 0%, var(--gilded-charm) 30%, var(--gilded-charm) 70%, transparent 100%);
    opacity: 0.5;
}

/* ---------- Deco Divider ---------- */

.deco-divider {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    padding: 56px clamp(24px, 4vw, 64px);
    color: var(--gilded-charm);
    max-width: 1320px;
    margin: 0 auto;
    opacity: 0;
    transform: translateY(12px);
    transition: opacity 800ms var(--elastic), transform 800ms var(--elastic);
}

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

.deco-divider .rule {
    flex: 1;
    height: 1px;
    background: linear-gradient(90deg, transparent 0%, var(--gilded-charm) 50%, transparent 100%);
    opacity: 0.6;
    max-width: 320px;
}

.deco-divider .icon.pyramid { width: 56px; height: 28px; }
.deco-divider .icon.sunburst { width: 48px; height: 48px; }

.deco-divider .icon {
    transform: scale(0);
    transition: transform 800ms var(--elastic) 200ms;
}

.deco-divider.in-view .icon { transform: scale(1); }

/* ---------- Quest Section / Grid ---------- */

.quest-section {
    position: relative;
    padding: clamp(60px, 8vw, 120px) clamp(24px, 4vw, 64px);
    overflow: hidden;
}

.section-head {
    max-width: 1320px;
    margin: 0 auto 56px;
    text-align: center;
    position: relative;
    z-index: 3;
}

.eyebrow {
    display: inline-block;
    font-family: var(--font-accent);
    font-size: 0.8rem;
    font-weight: 500;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--patina);
    margin-bottom: 14px;
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(2.2rem, 5vw, 4rem);
    font-weight: 400;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--antiquarian);
    line-height: 1.05;
    margin-bottom: 18px;
}

.section-dek {
    font-family: var(--font-body);
    font-style: italic;
    font-size: clamp(0.95rem, 1.1vw, 1.1rem);
    color: var(--patina);
    max-width: 560px;
    margin: 0 auto;
    line-height: 1.6;
}

.quest-grid {
    max-width: 1320px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    column-gap: 24px;
    row-gap: 32px;
    position: relative;
    z-index: 3;
}

/* Sepia tone for completed conquests */
.section-sepia .quest-card {
    filter: sepia(0.15) saturate(0.85);
}

.section-sepia .quest-card:hover {
    filter: sepia(0.08) saturate(0.95) brightness(1.02);
}

.section-sepia .card-title { color: #3C3229; }

.section-sepia .quest-card {
    border-image: linear-gradient(135deg, #A88A43, #D6C396, #A88A43) 1;
}

/* ---------- Next Quest ---------- */

.next-quest {
    position: relative;
    min-height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: clamp(60px, 8vw, 120px) clamp(24px, 4vw, 64px);
    overflow: hidden;
}

.next-quest .hero-card {
    opacity: 1;
    transform: none;
}

.next-quest .hero-card[data-quest] { opacity: 0; transform: translateY(40px); }
.next-quest .hero-card[data-quest].in-view { opacity: 1; transform: translateY(0); }

.next-quest .hero-card[data-quest].in-view:hover { transform: translateY(0) scale(1.02); }

.sparkle-field.dense .sparkle { opacity: 0.08; }

/* ---------- Footer Plinth ---------- */

.footer-plinth {
    position: relative;
    padding: clamp(72px, 10vw, 120px) clamp(24px, 4vw, 64px);
    color: var(--fizz);
    overflow: hidden;
    text-align: center;
}

.plinth-inner {
    position: relative;
    z-index: 3;
    max-width: 720px;
    margin: 0 auto;
}

.plinth-ornament {
    color: var(--gilded-charm);
    margin-bottom: 28px;
    display: flex;
    justify-content: center;
}

.plinth-ornament .icon.sunburst-light { width: 56px; height: 56px; }

.plinth-logotype {
    font-family: var(--font-display);
    font-size: clamp(2.4rem, 5vw, 4rem);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--fizz);
    margin-bottom: 16px;
    font-weight: 400;
}

.plinth-tagline {
    font-family: var(--font-body);
    font-style: italic;
    font-size: clamp(0.95rem, 1.1vw, 1.1rem);
    color: var(--carrara);
    max-width: 520px;
    margin: 0 auto 20px;
    line-height: 1.6;
}

.plinth-meta {
    font-family: var(--font-accent);
    font-size: 0.78rem;
    font-weight: 500;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--patina);
    margin-bottom: 32px;
}

.plinth-columns {
    display: flex;
    justify-content: center;
    gap: 72px;
    height: 44px;
}

.plinth-columns .col-rule {
    width: 1px;
    background: linear-gradient(180deg, transparent, var(--gilded-charm) 30%, var(--gilded-charm) 70%, transparent);
    opacity: 0.45;
}

/* ---------- Responsive ---------- */

@media (max-width: 1199px) {
    .quest-grid {
        grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    }
    .hero-title { font-size: clamp(2.6rem, 9vw, 5rem); letter-spacing: 0.12em; }
}

@media (max-width: 767px) {
    .quest-grid {
        grid-template-columns: 1fr;
        row-gap: 20px;
        column-gap: 0;
    }
    .hero-title { font-size: clamp(2.2rem, 12vw, 4rem); letter-spacing: 0.1em; }
    .hero-arch { width: 96vw; opacity: 0.18; }
    .site-header { height: 64px; }
    .plinth-columns { gap: 40px; }
}

/* Hide arch on very small screens if it crowds content */
@media (max-width: 480px) {
    .hero-arch { display: none; }
    .menu-list a { font-size: clamp(1.5rem, 7vw, 2.2rem); }
}