/**
 * Shared styles for card and demo pages.
 * Requires :root { --primary-color, --secondary-color, --bg-start, --bg-mid } to be set on the page.
 */

/* Floating hearts background */
.floating-hearts {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}
.floating-heart {
    position: absolute;
    color: color-mix(in srgb, var(--primary-color) 20%, transparent);
    animation: card-common-floatUp 20s infinite ease-in-out;
}
@keyframes card-common-floatUp {
    0%, 100% { transform: translateY(100vh) rotate(0deg); opacity: 0; }
    10% { opacity: 0.3; }
    90% { opacity: 0.3; }
    100% { transform: translateY(-100vh) rotate(360deg); opacity: 0; }
}

/* Sparkles */
.sparkle {
    position: fixed;
    width: 4px;
    height: 4px;
    background: color-mix(in srgb, var(--secondary-color) 60%, transparent);
    border-radius: 50%;
    animation: card-common-sparkle 3s infinite ease-in-out;
    pointer-events: none;
    z-index: 1;
}
@keyframes card-common-sparkle {
    0%, 100% { opacity: 0; transform: scale(0); }
    50% { opacity: 1; transform: scale(1); }
}

/* Multiplying mini hearts */
.multiplying-hearts-bg {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 5;
    overflow: hidden;
}
.mini-heart, .final-slide-heart {
    position: absolute;
    color: var(--primary-color);
    opacity: 0.6;
    animation: card-common-finalHeartFloat 12s linear infinite;
}
.mini-heart i, .final-slide-heart i {
    font-size: inherit;
}
@keyframes card-common-finalHeartFloat {
    0%, 100% { transform: translateY(100vh) translateX(var(--heart-drift, 0)) rotate(0deg); opacity: 0; }
    10% { opacity: 0.6; }
    90% { opacity: 0.6; }
    100% { transform: translateY(-100vh) translateX(var(--heart-drift, 0)) rotate(360deg); opacity: 0; }
}

/* Scroll hint */
.scroll-hint {
    position: fixed;
    bottom: 100px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 9998;
    animation: card-common-bounceHint 2s ease-in-out infinite;
    pointer-events: none;
}
.scroll-hint.hidden,
.scroll-hint.at-end {
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.5s, visibility 0.5s;
}
.scroll-hint-text {
    background: rgba(0,0,0,0.6);
    color: #fff;
    padding: 10px 20px;
    border-radius: 30px;
    font-size: 14px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.3);
}
@keyframes card-common-bounceHint {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(8px); }
}

@keyframes card-common-fadeSlideUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Intro Teaser Screen */
#introScreen {
    display: none;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    z-index: 99999;
    background: linear-gradient(135deg, var(--bg-start) 0%, var(--bg-mid) 50%, var(--bg-start) 100%);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px 20px;
    text-align: center;
}
#introScreen.visible { display: flex !important; }
.intro-line {
    font-family: 'Playfair Display', serif;
    font-size: 2rem;
    color: #fff;
    opacity: 0;
    margin: 15px 0;
    line-height: 1.4;
}
.intro-line.show {
    animation: card-common-introFadeIn 1.2s ease forwards;
}
.intro-line.special {
    font-family: 'Dancing Script', cursive;
    font-size: 2.5rem;
    color: var(--primary-color);
}
@keyframes card-common-introFadeIn {
    from { opacity: 0; transform: translateY(30px) scale(0.9); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}
@media (max-width: 768px) {
    .intro-line { font-size: 1.5rem; }
    .intro-line.special { font-size: 1.8rem; }
}

/* Heart Pinch Screen */
#heartPinchScreen {
    display: none;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    z-index: 100000;
    background: linear-gradient(135deg, var(--bg-start) 0%, var(--bg-mid) 50%, var(--bg-start) 100%);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 20px;
    box-sizing: border-box;
}
#heartPinchScreen.visible { display: flex !important; }
.heart-pinch-subtitle {
    font-family: 'Dancing Script', cursive;
    font-size: 1.4rem;
    color: var(--primary-color);
    margin-bottom: 15px;
    opacity: 0;
    animation: card-common-fadeSlideUp 1s ease 0.3s forwards;
}
.heart-pinch-title {
    font-family: 'Playfair Display', serif;
    font-size: 2.8rem;
    font-weight: 700;
    color: #fff;
    text-shadow: 0 4px 20px rgba(0,0,0,0.4);
    margin-bottom: 10px;
    text-align: center;
    opacity: 0;
    animation: card-common-fadeSlideUp 1s ease 0.5s forwards;
}
.heart-pinch-name {
    font-family: 'Dancing Script', cursive;
    font-size: 3.5rem;
    color: var(--primary-color);
    margin-bottom: 100px;
    opacity: 0;
    animation: card-common-fadeSlideUp 1s ease 0.7s forwards, card-common-nameGlow 2s ease-in-out infinite 1.7s;
}
@keyframes card-common-nameGlow {
    0%, 100% { text-shadow: 0 0 20px color-mix(in srgb, var(--primary-color) 40%, transparent), 0 4px 20px rgba(0,0,0,0.4); }
    50% { text-shadow: 0 0 40px color-mix(in srgb, var(--primary-color) 60%, transparent), 0 4px 20px rgba(0,0,0,0.4); }
}
.heart-pinch-hint {
    font-size: 0.95rem;
    color: rgba(255,255,255,0.5);
    margin-top: 20px;
    opacity: 0;
    animation: card-common-fadeSlideUp 1s ease 2.5s forwards;
}
@media (max-width: 768px) {
    .heart-pinch-title { font-size: 2rem; }
    .heart-pinch-name { font-size: 2.5rem; }
    .heart-pinch-subtitle { font-size: 2.1rem; }
}

/* Magical moments intro */
#magicalMomentsScreen {
    display: none;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    z-index: 100001;
    background: linear-gradient(135deg, var(--bg-start) 0%, var(--bg-mid) 50%, var(--bg-start) 100%);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px 20px;
    text-align: center;
}
#magicalMomentsScreen.visible { display: flex !important; }
.magical-moments-title {
    font-family: 'Playfair Display', serif;
    font-size: clamp(1.6rem, 5vw, 2.4rem);
    font-weight: 600;
    color: #fff;
    margin-bottom: 20px;
    opacity: 0;
    animation: card-common-fadeSlideUp 1s ease 0.3s forwards;
    line-height: 1.4;
}
.magical-moments-sub {
    font-family: 'Dancing Script', cursive;
    font-size: clamp(1.4rem, 4vw, 2rem);
    color: var(--primary-color);
    opacity: 0;
    animation: card-common-fadeSlideUp 1s ease 0.8s forwards;
}
@media (max-width: 768px) {
    .magical-moments-title { font-size: 1.4rem; }
    .magical-moments-sub { font-size: 1.6rem; }
}

/* Confetti */
.confetti-container {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    pointer-events: none;
    z-index: 100002;
    overflow: hidden;
}
.confetti {
    position: absolute;
    width: 12px;
    height: 12px;
    animation: card-common-confettiFall 4s ease-out forwards;
}
@keyframes card-common-confettiFall {
    0% { transform: translateY(-20px) rotate(0deg); opacity: 1; }
    100% { transform: translateY(100vh) rotate(720deg); opacity: 0; }
}

/* Emoji Rain */
.emoji-rain-container {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    pointer-events: none;
    z-index: 99;
    overflow: hidden;
}
.emoji-rain {
    position: absolute;
    font-size: 24px;
    animation: card-common-emojiRainFall 6s linear forwards;
}
@keyframes card-common-emojiRainFall {
    0% { transform: translateY(-50px) rotate(0deg); opacity: 0.8; }
    100% { transform: translateY(100vh) rotate(360deg); opacity: 0; }
}

/* Make a Wish Screen */
#makeWishScreen {
    display: none;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    z-index: 99998;
    background: linear-gradient(135deg, var(--bg-start) 0%, var(--bg-mid) 50%, var(--bg-start) 100%);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px 20px;
    text-align: center;
}
#makeWishScreen.visible { display: flex !important; }
.wish-title {
    font-family: 'Playfair Display', serif;
    font-size: 2.5rem;
    color: #fff;
    margin-bottom: 20px;
    opacity: 0;
    animation: card-common-fadeSlideUp 1s ease 0.3s forwards;
}
.wish-subtitle {
    font-family: 'Dancing Script', cursive;
    font-size: 1.8rem;
    color: var(--primary-color);
    margin-bottom: 50px;
    opacity: 0;
    animation: card-common-fadeSlideUp 1s ease 0.6s forwards;
}
.wish-candles {
    display: flex;
    gap: 15px;
    margin-bottom: 40px;
    opacity: 0;
    animation: card-common-fadeSlideUp 1s ease 0.9s forwards;
}
.wish-candle {
    font-size: 60px;
    animation: card-common-candleFlicker 0.5s ease-in-out infinite alternate;
}
.wish-candle.blown { animation: none; opacity: 0.3; filter: grayscale(1); }
@keyframes card-common-candleFlicker {
    from { transform: scale(1) rotate(-2deg); }
    to { transform: scale(1.05) rotate(2deg); }
}
.wish-btn {
    padding: 18px 50px;
    font-size: 1.2rem;
    font-weight: 600;
    font-family: 'Poppins', sans-serif;
    color: #fff;
    background: linear-gradient(135deg, var(--primary-color), color-mix(in srgb, var(--primary-color), black 20%));
    border: none;
    border-radius: 50px;
    cursor: pointer;
    box-shadow: 0 15px 40px color-mix(in srgb, var(--primary-color) 40%, transparent);
    transition: all 0.3s ease;
    opacity: 0;
    animation: card-common-fadeSlideUp 1s ease 1.2s forwards, card-common-btnPulse 2s ease-in-out infinite 2.2s;
}
@keyframes card-common-btnPulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}
.wish-btn:hover { transform: scale(1.08); }
@media (max-width: 768px) {
    .wish-title { font-size: 1.8rem; }
    .wish-subtitle { font-size: 1.4rem; }
    .wish-candle { font-size: 45px; }
}

/* Heart balloon & pop */
@keyframes card-common-heartDropIn {
    0% { transform: translateY(-120vh) scale(0.6) rotate(-45deg); opacity: 0; }
    60% { transform: translateY(30px) scale(1.1) rotate(-45deg); opacity: 1; }
    80% { transform: translateY(-10px) scale(0.95) rotate(-45deg); }
    100% { transform: translateY(0) scale(1) rotate(-45deg); }
}
@keyframes card-common-heartFloat {
    0%, 100% { transform: rotate(-45deg) translateY(0); }
    50% { transform: rotate(-45deg) translateY(-20px); }
}
.heart-balloon {
    position: relative;
    width: 200px;
    height: 180px;
    background: linear-gradient(145deg, var(--primary-color), color-mix(in srgb, var(--primary-color), black 25%));
    transform: rotate(-45deg);
    box-shadow: 0 25px 50px rgba(0,0,0,0.3), inset -10px -10px 20px rgba(0,0,0,0.2), inset 10px 10px 20px rgba(255,255,255,0.2);
    animation: card-common-heartDropIn 1.8s cubic-bezier(.17,.67,.48,1.32) forwards, card-common-heartFloat 3s ease-in-out infinite 2s;
    cursor: pointer;
}
.heart-balloon:before,
.heart-balloon:after {
    content: "";
    position: absolute;
    width: 200px;
    height: 180px;
    background: linear-gradient(145deg, var(--primary-color), color-mix(in srgb, var(--primary-color), black 25%));
    border-radius: 50%;
}
.heart-balloon:before { top: -100px; left: 0; }
.heart-balloon:after { left: 100px; top: 0; }
@keyframes card-common-heartGlowPulse {
    0%, 100% { box-shadow: 0 25px 50px rgba(0,0,0,0.3), 0 0 30px color-mix(in srgb, var(--primary-color) 40%, transparent); }
    50% { box-shadow: 0 25px 50px rgba(0,0,0,0.3), 0 0 50px color-mix(in srgb, var(--primary-color) 60%, transparent); }
}
.heart-balloon:hover {
    animation: card-common-heartGlowPulse 1.5s infinite alternate;
}
@keyframes card-common-heartPop {
    0% { transform: scale(1) rotate(-45deg); opacity: 1; }
    40% { transform: scale(1.4) rotate(-45deg); }
    100% { transform: scale(0) rotate(-45deg); opacity: 0; }
}
.heart-balloon.popped {
    animation: card-common-heartPop 0.6s ease forwards;
    pointer-events: none;
}
.heart-pinch-btn {
    margin-top: 50px;
    padding: 14px 32px;
    font-size: 1.1rem;
    font-weight: 600;
    font-family: 'Poppins', sans-serif;
    color: #fff;
    background: linear-gradient(135deg, var(--primary-color), color-mix(in srgb, var(--primary-color), black 20%));
    border: none;
    border-radius: 50px;
    cursor: pointer;
    box-shadow: 0 10px 30px color-mix(in srgb, var(--primary-color) 40%, transparent);
    transition: transform 0.3s, box-shadow 0.3s;
}
.heart-pinch-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 12px 40px color-mix(in srgb, var(--primary-color) 50%, transparent);
}
.heart-pinch-btn:disabled { opacity: 0.7; cursor: default; }
.heart-pop-sparkle {
    position: fixed;
    width: 12px;
    height: 12px;
    background: radial-gradient(circle, #fff 0%, var(--secondary-color) 40%, var(--primary-color) 70%, transparent 100%);
    border-radius: 50%;
    pointer-events: none;
    z-index: 100001;
    box-shadow: 0 0 15px var(--secondary-color), 0 0 25px var(--primary-color);
    animation: card-common-heartSparkleOut 1.5s ease-out forwards;
}
@keyframes card-common-heartSparkleOut {
    0% { opacity: 1; transform: scale(1) translate(0,0) rotate(0deg); }
    50% { opacity: 1; transform: scale(1.4) translate(calc(var(--sx) * 0.5), calc(var(--sy) * 0.5)) rotate(180deg); }
    100% { opacity: 0; transform: scale(0.3) translate(var(--sx), var(--sy)) rotate(360deg); }
}

/* Photo slideshow (card and demo) */
#photoSlideshow {
    height: 100vh;
    overflow: hidden;
    background: #000;
}
#photoSlideshow .track {
    display: flex;
    flex-direction: column;
}
#photoSlideshow .track img {
    /*width: 100%;
    height: 100vh;*/
    object-fit: contain;
    display: block;
}
/* Hide only the slideshow button on card (slideshow still runs automatically) */
.card-hide-slideshow-btn #show_photos {
    display: none !important;
}