/* ====================================================
   CSS CUSTOM PROPERTIES
   ==================================================== */
:root {
    --bg-primary: #0a0610;
    --bg-secondary: #120a1e;
    --gold: #d4a338;
    --gold-light: #f0d078;
    --rose: #e8758a;
    --rose-light: #ffc2d1;
    --rose-deep: #c94066;
    --pink: #ff6b9d;
    --purple: #9b59b6;
    --text-primary: #fffaf2;
    --text-secondary: rgba(255, 245, 230, 0.7);
    --shadow-glow: 0 0 40px rgba(212, 163, 56, 0.3);
    --font-heading: 'Noto Serif Bengali', serif;
    --font-body: 'Hind Siliguri', sans-serif;
    --ease-smooth: cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --ease-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

/* ====================================================
   RESET & BASE
   ==================================================== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html, body {
    width: 100%; height: 100%; overflow: hidden;
    background: var(--bg-primary); color: var(--text-primary);
    font-family: var(--font-body);
    -webkit-font-smoothing: antialiased;
}
body { position: relative; }
::-webkit-scrollbar { display: none; }
html { scrollbar-width: none; }

/* ====================================================
   PARTICLE CANVAS
   ==================================================== */
#particleCanvas {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    z-index: 1; pointer-events: none;
}

/* ====================================================
   CINEMATIC LETTERBOX BARS
   ==================================================== */
.cine-bar {
    position: fixed; left: 0; width: 100%; height: 0;
    background: #000; z-index: 90; pointer-events: none;
    transition: height 0.8s var(--ease-smooth);
}
.cine-bar-top { top: 0; }
.cine-bar-bottom { bottom: 0; }
body.cinematic .cine-bar { height: 5vh; }

/* ====================================================
   PROGRESS BAR
   ==================================================== */
.progress-bar {
    position: fixed; top: 0; left: 0; width: 100%; height: 3px;
    background: rgba(255,255,255,0.06); z-index: 100;
    opacity: 0; transition: opacity 0.5s;
}
.progress-bar.visible { opacity: 1; }
.progress-fill {
    height: 100%; width: 0%;
    background: linear-gradient(90deg, var(--rose), var(--gold), var(--rose));
    background-size: 200% 100%;
    animation: shimmerBar 2s ease infinite;
    transition: width 0.1s linear;
    border-radius: 0 2px 2px 0;
    box-shadow: 0 0 10px var(--rose), 0 0 5px var(--gold);
}
@keyframes shimmerBar { 0%{background-position:200% 0}100%{background-position:-200% 0} }

/* ====================================================
   SCENE BASE
   ==================================================== */
.scene {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    z-index: 2; opacity: 0; visibility: hidden;
    transition: opacity 1.2s var(--ease-smooth), visibility 0s 1.2s;
    display: flex; align-items: center; justify-content: center;
    background: radial-gradient(ellipse at center, var(--bg-secondary) 0%, var(--bg-primary) 70%);
}
.scene.active {
    opacity: 1; visibility: visible; z-index: 5;
    transition: opacity 1.2s var(--ease-smooth), visibility 0s 0s;
}
.scene.exiting { opacity: 0; z-index: 4; }
.scene-inner {
    width: 100%; height: 100%;
    display: flex; flex-direction: column;
    align-items: center; justify-content: center;
    padding: 40px 24px; position: relative; overflow: hidden;
}

/* Vignette */
.scene::after {
    content: ''; position: absolute; inset: 0;
    background: radial-gradient(ellipse at center, transparent 55%, rgba(0,0,0,0.5) 100%);
    pointer-events: none; z-index: 0;
}

/* ====================================================
   INTRO SCENE
   ==================================================== */
.intro-scene {
    text-align: center;
    background:
        radial-gradient(circle at 20% 80%, rgba(232,117,138,0.08) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(212,163,56,0.08) 0%, transparent 50%),
        radial-gradient(ellipse at center, var(--bg-secondary) 0%, var(--bg-primary) 70%);
}
.floating-emojis { position: absolute; top:0; left:0; width:100%; height:100%; pointer-events:none; z-index:0; }
.float-emoji {
    position: absolute; bottom: -40px; left: var(--x);
    font-size: clamp(18px, 3vw, 28px);
    animation: floatUp 8s var(--d) ease-in infinite; opacity: 0;
}
@keyframes floatUp {
    0%{transform:translateY(0) rotate(0deg);opacity:0}
    10%{opacity:0.7} 90%{opacity:0.5}
    100%{transform:translateY(-110vh) rotate(360deg);opacity:0}
}
.intro-sparkle-ring {
    position: absolute;
    width: clamp(280px, 55vw, 480px); height: clamp(280px, 55vw, 480px);
    border: 1px solid rgba(212,163,56,0.15); border-radius: 50%;
    animation: sparkleRingSpin 20s linear infinite, sparkleRingPulse 3s ease-in-out infinite;
    z-index: 0;
}
.intro-sparkle-ring::before, .intro-sparkle-ring::after {
    content:'✦'; position:absolute; color:var(--gold); font-size:14px;
    animation: sparkleGlow 2s ease-in-out infinite alternate;
}
.intro-sparkle-ring::before{top:-7px;left:50%}
.intro-sparkle-ring::after{bottom:-7px;right:20%;animation-delay:1s}
@keyframes sparkleRingSpin{from{transform:rotate(0deg)}to{transform:rotate(360deg)}}
@keyframes sparkleRingPulse{0%,100%{opacity:0.5;transform:scale(1)}50%{opacity:1;transform:scale(1.05)}}
@keyframes sparkleGlow{from{opacity:0.3;text-shadow:0 0 5px var(--gold)}to{opacity:1;text-shadow:0 0 15px var(--gold),0 0 30px var(--gold-light)}}

.intro-badge {
    font-size: clamp(13px,2vw,16px); font-weight:500; color:var(--gold-light);
    background:rgba(212,163,56,0.1); border:1px solid rgba(212,163,56,0.2);
    padding:8px 28px; border-radius:50px; letter-spacing:2px;
    margin-bottom:24px; position:relative; z-index:1;
    animation: badgeFadeIn 1s 0.3s ease-out both;
}
.intro-title {
    font-family:var(--font-heading); font-size:clamp(36px,10vw,80px);
    font-weight:700; line-height:1.2; color:var(--text-primary);
    text-shadow: 0 0 20px rgba(232,117,138,0.4), 0 0 60px rgba(232,117,138,0.2);
    position:relative; z-index:1;
    animation: titleReveal 1.2s 0.5s var(--ease-smooth) both;
}
.intro-title::after {
    content:''; display:block; width:80px; height:3px;
    background:linear-gradient(90deg,transparent,var(--gold),transparent);
    margin:16px auto 0; animation:lineExpand 1s 1s ease-out both;
}
.intro-date {
    display:flex; align-items:center; gap:16px; margin-top:20px;
    position:relative; z-index:1; animation: fadeInUp 0.8s 1.2s ease-out both;
}
.date-text {
    font-family:var(--font-heading); font-size:clamp(22px,5vw,36px);
    font-weight:600; color:var(--gold-light); text-shadow:0 0 20px rgba(212,163,56,0.3);
}
.date-line-left,.date-line-right { display:block; width:60px; height:1px; background:linear-gradient(90deg,transparent,var(--gold),transparent); }
.intro-subtitle {
    font-size:clamp(15px,3vw,20px); font-weight:300; color:var(--text-secondary);
    margin-top:16px; font-style:italic; position:relative; z-index:1;
    animation:fadeInUp 0.8s 1.5s ease-out both;
}

/* Play Button */
.play-btn {
    display:flex; flex-direction:column; align-items:center; gap:12px;
    margin-top:40px; background:none; border:none; cursor:pointer;
    position:relative; z-index:1; animation:fadeInUp 0.8s 1.8s ease-out both;
    transition:transform 0.3s ease;
}
.play-btn:hover { transform:scale(1.05); }
.play-btn-ring {
    position:absolute; top:50%; left:50%; width:80px; height:80px;
    transform:translate(-50%,-60%); border:2px solid var(--rose);
    border-radius:50%; animation:playRingPulse 2s ease-in-out infinite; pointer-events:none;
}
@keyframes playRingPulse{0%,100%{transform:translate(-50%,-60%) scale(1);opacity:0.6}50%{transform:translate(-50%,-60%) scale(1.3);opacity:0}}
.play-icon-wrap {
    width:64px; height:64px;
    background:linear-gradient(135deg,var(--rose),var(--rose-deep)); border-radius:50%;
    display:flex; align-items:center; justify-content:center;
    box-shadow:0 4px 20px rgba(232,117,138,0.4),0 0 40px rgba(232,117,138,0.2);
    transition:box-shadow 0.3s;
}
.play-btn:hover .play-icon-wrap { box-shadow:0 4px 30px rgba(232,117,138,0.6),0 0 60px rgba(232,117,138,0.3); }
.play-svg { width:24px; height:24px; color:white; margin-left:3px; }
.play-label { font-size:15px; font-weight:500; color:var(--rose-light); letter-spacing:1px; }

/* ====================================================
   PHOTO SCENE SLIDES
   ==================================================== */
.photo-scene {
    padding:60px 24px 100px; gap:24px;
    background:
        radial-gradient(circle at 50% 30%, rgba(232,117,138,0.05) 0%, transparent 60%),
        radial-gradient(ellipse at center, var(--bg-secondary) 0%, var(--bg-primary) 70%);
}
.slide-number {
    position:absolute; top:24px; right:28px;
    font-family:var(--font-heading); font-size:clamp(36px,8vw,60px);
    font-weight:700; color:rgba(212,163,56,0.06); line-height:1; z-index:0; user-select:none;
}

/* Photo */
.photo-wrapper {
    flex-shrink:0; position:relative; z-index:1; opacity:0;
    transform: scale(0.85); transition: none;
}
.scene.active .photo-wrapper {
    animation: photoReveal 1.2s 0.2s var(--ease-smooth) forwards;
}
@keyframes photoReveal {
    0% { opacity:0; transform:scale(0.85); filter:blur(8px) brightness(0.5); }
    50% { filter:blur(2px) brightness(0.9); }
    100% { opacity:1; transform:scale(1); filter:blur(0) brightness(1); }
}

.photo-frame {
    position:relative;
    width:clamp(220px,50vw,360px); height:clamp(220px,50vw,360px);
    border-radius:20px; overflow:hidden;
    border:2px solid rgba(212,163,56,0.25);
    box-shadow: 0 8px 32px rgba(0,0,0,0.4), 0 0 0 1px rgba(255,255,255,0.05), var(--shadow-glow);
    background:rgba(255,255,255,0.02);
}
.photo-frame::before {
    content:''; position:absolute; inset:-2px; border-radius:22px;
    background:linear-gradient(135deg,var(--gold),transparent 40%,transparent 60%,var(--rose));
    z-index:-1; opacity:0.4;
}
.frame-circle { border-radius:50%; }
.frame-circle::before { border-radius:50%; }
.frame-rounded-lg { border-radius:32px; }
.frame-rounded-lg::before { border-radius:34px; }
.frame-golden {
    border-color:var(--gold);
    box-shadow: 0 8px 32px rgba(0,0,0,0.4), 0 0 30px rgba(212,163,56,0.3),
                0 0 60px rgba(212,163,56,0.15), inset 0 0 30px rgba(212,163,56,0.1);
}
.photo-img {
    width:100%; height:100%; object-fit:cover; display:block;
}
/* Ken Burns on active */
.scene.active .photo-img {
    animation: kenBurns 8s ease-in-out forwards;
}
@keyframes kenBurns {
    0% { transform:scale(1); }
    100% { transform:scale(1.12); }
}
/* Alternate Ken Burns direction per slide */
.scene[data-index="2"].active .photo-img { animation-name: kenBurnsPanRight; }
.scene[data-index="4"].active .photo-img { animation-name: kenBurnsPanLeft; }
.scene[data-index="6"].active .photo-img { animation-name: kenBurnsPanRight; }
.scene[data-index="8"].active .photo-img { animation-name: kenBurnsPanLeft; }
.scene[data-index="10"].active .photo-img { animation-name: kenBurnsZoomSlow; }
@keyframes kenBurnsPanRight { 0%{transform:scale(1.05) translateX(-2%)} 100%{transform:scale(1) translateX(2%)} }
@keyframes kenBurnsPanLeft { 0%{transform:scale(1) translateX(2%)} 100%{transform:scale(1.08) translateX(-2%)} }
@keyframes kenBurnsZoomSlow { 0%{transform:scale(1)} 100%{transform:scale(1.15)} }

/* Photo Shine */
.photo-shine {
    position:absolute; top:0; left:-100%; width:50%; height:100%;
    background:linear-gradient(90deg,transparent,rgba(255,255,255,0.1),transparent);
    transform:skewX(-15deg); z-index:2; pointer-events:none;
}
.scene.active .photo-shine { animation: shineSwipe 2.5s 0.8s ease-in-out forwards; }
@keyframes shineSwipe { 0%{left:-100%} 100%{left:200%} }

/* ====================================================
   WISH BOX & TYPEWRITER
   ==================================================== */
.wish-box {
    text-align:center; position:relative; z-index:1;
    max-width:550px; min-height: 80px;
}
.wish-text {
    font-family:var(--font-heading); font-size:clamp(20px,5vw,30px);
    font-weight:500; line-height:1.9; color:var(--text-primary);
    text-shadow:0 0 20px rgba(232,117,138,0.15);
    min-height: 1.9em;
}
/* Typewriter cursor */
.wish-text.typing::after {
    content: '|';
    display: inline;
    color: var(--gold);
    font-weight: 300;
    animation: cursorBlink 0.6s step-end infinite;
    margin-left: 2px;
}
.wish-text.done::after {
    display: none;
}
@keyframes cursorBlink { 0%,100%{opacity:1} 50%{opacity:0} }

.wish-emoji {
    display:block; font-size:32px; margin-top:14px; opacity:0;
    transform: scale(0);
}
.wish-emoji.show {
    animation: emojiPop 0.6s var(--ease-bounce) forwards;
}
@keyframes emojiPop { from{transform:scale(0) rotate(-20deg);opacity:0} to{transform:scale(1) rotate(0deg);opacity:1} }

/* ====================================================
   FINALE SCENE
   ==================================================== */
.finale-scene {
    text-align:center;
    background:
        radial-gradient(circle at 50% 40%, rgba(232,117,138,0.1) 0%, transparent 50%),
        radial-gradient(circle at 30% 70%, rgba(212,163,56,0.08) 0%, transparent 40%),
        radial-gradient(circle at 70% 70%, rgba(155,89,182,0.06) 0%, transparent 40%),
        radial-gradient(ellipse at center, var(--bg-secondary) 0%, var(--bg-primary) 70%);
    overflow-y:auto; overflow-x:hidden;
    padding:20px 20px 60px; justify-content:center;
}
.finale-burst { position:absolute; top:0; left:0; width:100%; height:100%; pointer-events:none; z-index:0; }
.finale-content { position:relative; z-index:1; max-width:600px; }
.finale-heart-big {
    font-size:clamp(40px,10vw,65px); margin-bottom:10px; opacity:0;
}
.scene.active .finale-heart-big { animation:heartBeatIn 1s ease-out forwards; }
@keyframes heartBeatIn { 0%{opacity:0;transform:scale(0)} 50%{transform:scale(1.3)} 70%{transform:scale(0.9)} 85%{transform:scale(1.1)} 100%{opacity:1;transform:scale(1)} }
.finale-title {
    font-family:var(--font-heading); font-size:clamp(30px,7.5vw,54px);
    font-weight:700; color:var(--text-primary);
    text-shadow:0 0 30px rgba(232,117,138,0.5),0 0 60px rgba(232,117,138,0.2);
    opacity:0;
}
.scene.active .finale-title { animation:fadeInUp 0.8s 0.4s ease-out forwards; }
.finale-divider { display:flex;align-items:center;justify-content:center;gap:12px;margin:16px 0;color:var(--gold);font-size:14px;opacity:0; }
.scene.active .finale-divider { animation:fadeInUp 0.6s 0.7s ease-out forwards; }
.divider-line { width:50px; height:1px; background:linear-gradient(90deg,transparent,var(--gold),transparent); }
.finale-message {
    font-family:var(--font-heading); font-size:clamp(18px,4vw,26px);
    font-weight:400; line-height:2; color:var(--text-primary);
    text-shadow:0 0 10px rgba(232,117,138,0.15); min-height:2em;
}
.finale-message.typing::after {
    content:'|'; display:inline; color:var(--gold);
    font-weight:300; animation:cursorBlink 0.6s step-end infinite; margin-left:2px;
}
.finale-message.done::after { display:none; }
.finale-sign { margin-top:24px;display:flex;align-items:center;justify-content:center;gap:10px;opacity:0; }
.finale-sign.show { animation:fadeInUp 0.6s ease-out forwards; }
.sign-text { font-family:var(--font-heading);font-size:clamp(20px,4.5vw,30px);font-weight:600;font-style:italic;color:var(--rose-light);text-shadow:0 0 20px rgba(232,117,138,0.3); }
.sign-heart { font-size:20px; animation:heartPulse 1.5s ease-in-out infinite; }
@keyframes heartPulse { 0%,100%{transform:scale(1)} 50%{transform:scale(1.2)} }
.replay-btn {
    margin-top:28px; padding:14px 36px;
    background:linear-gradient(135deg,rgba(232,117,138,0.2),rgba(212,163,56,0.2));
    border:1px solid rgba(212,163,56,0.3); border-radius:50px;
    color:var(--gold-light); font-family:var(--font-body); font-size:16px; font-weight:500;
    cursor:pointer; display:inline-flex; align-items:center; gap:8px;
    transition:all 0.3s ease; opacity:0;
}
.replay-btn.show { animation:fadeInUp 0.6s ease-out forwards; }
.replay-btn:hover { background:linear-gradient(135deg,rgba(232,117,138,0.35),rgba(212,163,56,0.35)); transform:translateY(-2px); box-shadow:0 4px 20px rgba(232,117,138,0.2); }
.replay-icon { font-size:18px; display:inline-block; transition:transform 0.3s; }
.replay-btn:hover .replay-icon { transform:rotate(180deg); }

/* ====================================================
   CONTROLS
   ==================================================== */
.controls {
    position:fixed; bottom:56px; left:50%; transform:translateX(-50%);
    display:flex; align-items:center; gap:16px; z-index:50;
    background:rgba(10,6,16,0.55); backdrop-filter:blur(12px); -webkit-backdrop-filter:blur(12px);
    padding:10px 20px; border-radius:50px; border:1px solid rgba(255,255,255,0.08);
    transition:opacity 0.5s,visibility 0.5s;
}
.controls.hidden { opacity:0; visibility:hidden; pointer-events:none; }
.ctrl-btn {
    width:40px; height:40px; border:none;
    background:rgba(255,255,255,0.06); border-radius:50%;
    cursor:pointer; display:flex; align-items:center; justify-content:center;
    transition:all 0.3s ease; color:var(--text-primary);
}
.ctrl-btn:hover { background:rgba(232,117,138,0.25); transform:scale(1.1); }
.ctrl-btn svg { width:20px; height:20px; }
.ctrl-btn .icon-play { display:none; }
.ctrl-btn.paused .icon-pause { display:none; }
.ctrl-btn.paused .icon-play { display:block; }

/* ====================================================
   SLIDE DOTS
   ==================================================== */
.slide-dots {
    position:fixed; bottom:24px; left:50%; transform:translateX(-50%);
    display:flex; align-items:center; gap:8px; z-index:50;
    transition:opacity 0.5s,visibility 0.5s;
}
.slide-dots.hidden { opacity:0; visibility:hidden; pointer-events:none; }
.dot { width:8px;height:8px;border-radius:50%;background:rgba(255,255,255,0.2);cursor:pointer;transition:all 0.4s ease; }
.dot.active { background:var(--rose);box-shadow:0 0 8px var(--rose);transform:scale(1.3); }
.dot:hover:not(.active) { background:rgba(255,255,255,0.4); }

/* ====================================================
   CONFETTI
   ==================================================== */
.confetti-piece {
    position:fixed; z-index:60; pointer-events:none;
    animation: confettiFall var(--fall-dur,3s) var(--fall-delay,0s) ease-in forwards;
    border-radius:2px;
}
@keyframes confettiFall { 0%{transform:translateY(-10vh) rotate(0deg);opacity:1} 100%{transform:translateY(110vh) rotate(720deg);opacity:0} }

/* ====================================================
   BRANDING FOOTER
   ==================================================== */
.branding-footer {
    position:fixed; bottom:0; left:0; width:100%;
    display:flex; align-items:center; justify-content:center; gap:6px;
    padding:8px 20px;
    background:linear-gradient(180deg, transparent 0%, rgba(10,5,16,0.85) 40%, rgba(10,5,16,0.95) 100%);
    z-index:200; font-family:var(--font-body);
}
.brand-text { font-size:11px; font-weight:400; color:rgba(255,245,230,0.3); letter-spacing:0.5px; }
.brand-link {
    font-size:11px; font-weight:600; color:var(--gold);
    text-decoration:none; letter-spacing:0.5px;
    transition:all 0.3s ease; position:relative;
}
.brand-link::after { content:'';position:absolute;bottom:-2px;left:0;width:0;height:1px;background:var(--gold-light);transition:width 0.3s ease; }
.brand-link:hover { color:var(--gold-light); text-shadow:0 0 10px rgba(212,163,56,0.4); }
.brand-link:hover::after { width:100%; }

/* ====================================================
   UTILITY KEYFRAMES
   ==================================================== */
@keyframes fadeInUp { from{opacity:0;transform:translateY(25px)} to{opacity:1;transform:translateY(0)} }
@keyframes badgeFadeIn { from{opacity:0;transform:translateY(-10px) scale(0.9)} to{opacity:1;transform:translateY(0) scale(1)} }
@keyframes titleReveal { from{opacity:0;transform:translateY(30px) scale(0.95);letter-spacing:8px} to{opacity:1;transform:translateY(0) scale(1);letter-spacing:0px} }
@keyframes lineExpand { from{width:0;opacity:0} to{width:80px;opacity:1} }

/* ====================================================
   PLACEHOLDER
   ==================================================== */
.photo-img.error { display:none; }
.photo-frame.img-error::after {
    content:'📷'; position:absolute; inset:0;
    display:flex; align-items:center; justify-content:center;
    font-size:48px; background:linear-gradient(135deg,rgba(232,117,138,0.1),rgba(212,163,56,0.1));
}

/* ====================================================
   RESPONSIVE
   ==================================================== */
@media(max-width:480px){
    .scene-inner{padding:50px 16px 90px}
    .photo-frame{width:clamp(200px,65vw,280px);height:clamp(200px,65vw,280px)}
    .controls{bottom:48px;padding:8px 14px;gap:10px}
    .slide-dots{bottom:16px}
    .ctrl-btn{width:36px;height:36px}
}
@media(min-width:768px){
    .photo-scene{flex-direction:row;gap:40px;padding:40px 60px}
    .photo-frame{width:clamp(280px,32vw,400px);height:clamp(280px,32vw,400px)}
    .wish-box{text-align:left;max-width:420px}
    .slide-number{font-size:80px}
}
@media(min-width:1200px){
    .photo-frame{width:420px;height:420px}
    .wish-text{font-size:28px}
}