/* ==========================================================================
   RANGAM SARADHA SILKS — LUXURY CURTAIN REVEAL INTRO ANIMATION
   Concept: Grand Theatre / Royal Indian Silk Opening
   Palette: Imperial Wine (#4A0817), Royal Crimson (#721428), Antique Gold (#C5A059)
   ========================================================================== */

/* If user already visited in this session or prefers reduced motion, hide immediately */
html.curtain-already-seen #luxuryCurtainIntro,
html.no-curtain #luxuryCurtainIntro {
    display: none !important;
}

/* Prevent body scrolling while closed curtains are presenting */
body.curtain-presenting {
    overflow: hidden !important;
    touch-action: none !important;
}

/* Full-Screen Curtain Overlay Container */
.luxury-curtain-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    width: 100vw;
    height: 100vh;
    height: 100dvh;
    z-index: 99999999;
    overflow: hidden;
    pointer-events: auto;
    background-color: #0e0104;
    transition: opacity 0.4s ease, visibility 0.4s ease;
}

.luxury-curtain-overlay.curtain-dismissed {
    opacity: 0 !important;
    visibility: hidden !important;
    pointer-events: none !important;
}

/* --------------------------------------------------------------------------
   CURTAIN PANELS (Left 50%, Right 50% meeting at 50vw center)
   -------------------------------------------------------------------------- */
.curtain-panel {
    position: absolute;
    top: 0;
    bottom: 0;
    width: 50vw;
    height: 100%;
    overflow: hidden;
    will-change: transform;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
}

/* LEFT CURTAIN PANEL */
.curtain-panel-left {
    left: 0;
    transform-origin: left center;
    transform: translate3d(0, 0, 0);
}

/* RIGHT CURTAIN PANEL */
.curtain-panel-right {
    left: 50vw;
    transform-origin: right center;
    transform: translate3d(0, 0, 0);
}

/* When opening trigger is active: 2.6s slow, cinematic heavy silk glide */
.luxury-curtain-overlay.curtain-opening .curtain-panel-left {
    animation: curtainOpenLeft 2.6s cubic-bezier(0.77, 0, 0.175, 1) forwards;
}

.luxury-curtain-overlay.curtain-opening .curtain-panel-right {
    animation: curtainOpenRight 2.6s cubic-bezier(0.77, 0, 0.175, 1) forwards;
}

/* Organic Heavy Silk Movement: gathers subtle fabric weight into folds as it slides */
@keyframes curtainOpenLeft {
    0% {
        transform: translate3d(0, 0, 0) scaleX(1);
    }
    38% {
        transform: translate3d(-24%, 0, 0) scaleX(0.975);
    }
    72% {
        transform: translate3d(-70%, 0, 0) scaleX(0.965);
    }
    100% {
        transform: translate3d(-101%, 0, 0) scaleX(1);
    }
}

@keyframes curtainOpenRight {
    0% {
        transform: translate3d(0, 0, 0) scaleX(1);
    }
    38% {
        transform: translate3d(24%, 0, 0) scaleX(0.975);
    }
    72% {
        transform: translate3d(70%, 0, 0) scaleX(0.965);
    }
    100% {
        transform: translate3d(101%, 0, 0) scaleX(1);
    }
}

/* --------------------------------------------------------------------------
   CURTAIN FABRIC: Rich Silk / Velvet Folds & Indian Textile Sheen
   -------------------------------------------------------------------------- */
.curtain-fabric {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    /* Royal heavy mulberry silk vertical pleating simulation */
    background:
        repeating-linear-gradient(
            90deg,
            #1d0208 0%,
            #3b0612 3%,
            #630c20 6.5%,
            #7d132a 10%,
            #4a0817 13.5%,
            #22030a 16.5%,
            #150105 20%
        );
    background-size: 200px 100%;
    box-shadow: inset 0 25px 80px rgba(0, 0, 0, 0.75), inset 0 -35px 80px rgba(0, 0, 0, 0.85);
}

/* Soft overhead lighting spotlight on silk fabric */
.curtain-lighting-overlay {
    position: absolute;
    inset: 0;
    pointer-events: none;
    background: radial-gradient(ellipse 90% 80% at 50% 15%, rgba(227, 197, 134, 0.12) 0%, rgba(114, 20, 40, 0.05) 50%, rgba(0, 0, 0, 0.65) 100%);
    mix-blend-mode: screen;
}

/* Subtle fabric texture noise overlay */
.curtain-shadow-overlay {
    position: absolute;
    inset: 0;
    pointer-events: none;
    background: linear-gradient(180deg, rgba(0,0,0,0.5) 0%, transparent 15%, transparent 80%, rgba(0,0,0,0.7) 100%);
}

/* --------------------------------------------------------------------------
   GOLD ZARI SEAM BORDER: Meeting down the exact center line (50vw)
   -------------------------------------------------------------------------- */
.curtain-gold-trim {
    position: absolute;
    top: 0;
    bottom: 0;
    width: 6px;
    z-index: 5;
    background: linear-gradient(
        180deg,
        #f5d77f 0%,
        #c5a059 20%,
        #8c6a2e 35%,
        #fbf1cf 50%,
        #c5a059 65%,
        #8c6a2e 80%,
        #f5d77f 100%
    );
    box-shadow: 0 0 16px rgba(197, 160, 89, 0.55), 0 0 3px rgba(255, 255, 255, 0.6);
}

/* Left panel has trim on its right edge */
.curtain-panel-left .curtain-gold-trim {
    right: 0;
}

/* Right panel has trim on its left edge */
.curtain-panel-right .curtain-gold-trim {
    left: 0;
}

/* --------------------------------------------------------------------------
   CENTER ROYAL EMBLEM / SEAL (Visible while curtains are closed)
   -------------------------------------------------------------------------- */
.curtain-emblem-wrap {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 10;
    pointer-events: none;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transition: opacity 0.45s cubic-bezier(0.16, 1, 0.3, 1), transform 0.45s cubic-bezier(0.16, 1, 0.3, 1);
}

.luxury-curtain-overlay.curtain-opening .curtain-emblem-wrap {
    opacity: 0;
    transform: translate(-50%, -50%) scale(1.1);
    filter: blur(4px);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1), filter 0.8s ease;
}

/* Outer golden halo pulse */
.curtain-emblem-halo {
    position: absolute;
    width: 240px;
    height: 240px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(197, 160, 89, 0.22) 0%, rgba(114, 20, 40, 0.08) 55%, transparent 75%);
    animation: emblemHaloPulse 2.4s ease-in-out infinite alternate;
}

@keyframes emblemHaloPulse {
    0% {
        transform: scale(0.92);
        opacity: 0.6;
    }
    100% {
        transform: scale(1.12);
        opacity: 1;
    }
}

/* Main Medallion Disc */
.curtain-emblem-disc {
    position: relative;
    width: 175px;
    height: 175px;
    border-radius: 50%;
    background: radial-gradient(circle at 40% 35%, #4a0817 0%, #27040c 70%, #150105 100%);
    border: 2px solid #C5A059;
    box-shadow:
        0 14px 45px rgba(0, 0, 0, 0.85),
        0 0 25px rgba(197, 160, 89, 0.35),
        inset 0 2px 10px rgba(255, 255, 255, 0.15),
        inset 0 -4px 15px rgba(0, 0, 0, 0.6);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 16px 14px;
    text-align: center;
}

/* Decorative inner gold ring */
.curtain-emblem-disc::before {
    content: '';
    position: absolute;
    inset: 5px;
    border-radius: 50%;
    border: 1px dashed rgba(197, 160, 89, 0.5);
    pointer-events: none;
}

/* Logo Image inside emblem */
.curtain-emblem-logo {
    width: 48px;
    height: 48px;
    object-fit: contain;
    border-radius: 50%;
    filter: drop-shadow(0 2px 8px rgba(0, 0, 0, 0.6));
    margin-bottom: 6px;
    background: #ffffff;
    padding: 3px;
    border: 1px solid #C5A059;
}

/* Brand Name in emblem */
.curtain-emblem-brand {
    font-family: 'Playfair Display', Georgia, serif;
    font-size: 0.76rem;
    font-weight: 800;
    letter-spacing: 0.14em;
    color: #f7e08b;
    text-transform: uppercase;
    line-height: 1.25;
    text-shadow: 0 2px 6px rgba(0, 0, 0, 0.8), 0 0 12px rgba(197, 160, 89, 0.4);
}

.curtain-emblem-subtitle {
    font-family: 'Poppins', -apple-system, sans-serif;
    font-size: 0.52rem;
    font-weight: 500;
    letter-spacing: 0.18em;
    color: #e5c88e;
    text-transform: uppercase;
    margin-top: 3px;
    opacity: 0.9;
}

/* Filigree ornament line */
.curtain-emblem-motif {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 5px;
    margin-top: 4px;
    width: 70%;
}

.curtain-emblem-motif .motif-line {
    flex-grow: 1;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(197, 160, 89, 0.7), transparent);
}

.curtain-emblem-motif .motif-gem {
    font-size: 0.55rem;
    color: #f7e08b;
    line-height: 1;
}

/* --------------------------------------------------------------------------
   HOMEPAGE SUBTLE REVEAL UNDERNEATH (Scale 1.02 -> 1, Opacity 0.95 -> 1)
   -------------------------------------------------------------------------- */
body.curtain-presenting main,
body.curtain-presenting #homeMainContent,
body.curtain-presenting .navbar-premium {
    transform: scale(1.02);
    opacity: 0.94;
    transition: transform 2.6s cubic-bezier(0.77, 0, 0.175, 1), opacity 2.6s ease;
}

body.curtain-revealed main,
body.curtain-revealed #homeMainContent,
body.curtain-revealed .navbar-premium {
    transform: scale(1);
    opacity: 1;
    transition: transform 2.6s cubic-bezier(0.77, 0, 0.175, 1), opacity 2.6s ease;
}

/* --------------------------------------------------------------------------
   MOBILE & RESPONSIVE REFINEMENTS
   -------------------------------------------------------------------------- */
@media (max-width: 767.98px) {
    .curtain-emblem-disc {
        width: 140px;
        height: 140px;
        padding: 12px 10px;
    }

    .curtain-emblem-halo {
        width: 180px;
        height: 180px;
    }

    .curtain-emblem-logo {
        width: 38px;
        height: 38px;
        margin-bottom: 4px;
    }

    .curtain-emblem-brand {
        font-size: 0.65rem;
        letter-spacing: 0.1em;
    }

    .curtain-emblem-subtitle {
        font-size: 0.46rem;
        letter-spacing: 0.12em;
    }

    .curtain-gold-trim {
        width: 4px;
    }

    /* Mobile opening duration: 2.2s (cinematic & smooth) */
    .luxury-curtain-overlay.curtain-opening .curtain-panel-left {
        animation-duration: 2.2s !important;
    }

    .luxury-curtain-overlay.curtain-opening .curtain-panel-right {
        animation-duration: 2.2s !important;
    }
}

/* --------------------------------------------------------------------------
   ACCESSIBILITY: prefers-reduced-motion
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
    #luxuryCurtainIntro {
        display: none !important;
    }
    body.curtain-presenting {
        overflow: auto !important;
        touch-action: auto !important;
    }
}