@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;600;700;900&display=swap');

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: 'Poppins', sans-serif;
    overflow: hidden;
    user-select: none;
}

.container {
    min-height: 100vh;
    width: 100vw;
    background: linear-gradient(135deg, #fff0f3 0%, #ffe4e9 50%, #ffd4e5 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    padding-top: 30px; /* Space for header */
}

/* Sparkle canvas */
#sparkleCanvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
}

/* Floating hearts background */
.hearts-background {
    position: absolute;
    inset: 0;
    pointer-events: none;
    overflow: hidden;
}

.floating-heart {
    position: absolute;
    font-size: 2rem;
    opacity: 0.6;
    animation: floatUp linear infinite;
}

/* Card */
.card {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 30px;
    padding: 3rem 2rem;
    max-width: 550px;
    width: 90%;
    box-shadow: 0 20px 60px rgba(255, 77, 109, 0.3);
    position: relative;
    z-index: 10;
    animation: cardEntrance 0.8s cubic-bezier(0.34, 1.56, 0.64, 1);
    margin: 2rem auto;
}

.content {
    position: relative;
    width: 100%;
}

.screen {
    display: none;
    text-align: center;
}

.screen.active {
    display: block;
    animation: fadeIn 0.5s ease-out;
}

/* Emoji container */
.emoji-container {
    position: relative;
    display: inline-block;
    margin-bottom: 1.5rem;
}

.main-emoji {
    font-size: 6rem;
    animation: heartbeat 1.5s ease-in-out infinite;
    display: inline-block;
}

.floating-emoji {
    position: absolute;
    font-size: 2.5rem;
    top: -10px;
    right: -20px;
    animation: float 2s ease-in-out infinite;
}

.floating-emoji-2 {
    position: absolute;
    font-size: 2rem;
    bottom: 0;
    left: -15px;
    animation: float 2.5s ease-in-out infinite;
}

/* Title */
.title {
    font-size: 2rem;
    font-weight: 700;
    color: #590d22;
    margin-bottom: 0.5rem;
    line-height: 1.4;
}

.name-highlight {
    color: #ff4d6d;
    text-shadow: 2px 2px 4px rgba(255, 77, 109, 0.3);
    animation: glow 2s ease-in-out infinite;
}

.valentine-text {
    display: block;
    color: #ff4d6d;
    font-size: 2.5rem;
    margin-top: 0.5rem;
    animation: pulse 2s ease-in-out infinite;
}

.subtitle {
    color: #590d22;
    font-size: 1.1rem;
    margin-bottom: 2rem;
    opacity: 0.8;
}

/* Buttons */
.button-container {
    position: relative;
    min-height: 120px;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 1rem;
    padding: 0 1rem;
}

.btn {
    font-family: 'Poppins', sans-serif;
    font-size: 1.2rem;
    font-weight: 600;
    padding: 1rem 2.5rem;
    border: none;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
    color: white;
    position: relative;
    z-index: 10;
    flex-shrink: 0;
}

.btn-yes {
    background: linear-gradient(135deg, #ff4d6d 0%, #ff758f 100%);
    box-shadow: 0 8px 25px rgba(255, 77, 109, 0.4);
    animation: pulseGlow 2s infinite;
}

.btn-yes:hover {
    transform: scale(1.1) rotate(-2deg);
    box-shadow: 0 12px 35px rgba(255, 77, 109, 0.6);
}

.btn-yes:active {
    transform: scale(0.95);
}

.btn-no {
    background: linear-gradient(135deg, #590d22 0%, #800f2f 100%);
    box-shadow: 0 4px 15px rgba(89, 13, 34, 0.3);
    transition: all 1.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    position: relative;
}

.btn-no.moving {
    position: absolute !important;
}

.btn-no.vanished {
    opacity: 0 !important;
    pointer-events: none !important;
    transform: scale(0) rotate(360deg) !important;
}

/* Phrase */
.phrase {
    min-height: 30px;
    color: #ff4d6d;
    font-weight: 600;
    font-size: 1.1rem;
    margin: 1rem 0;
    animation: bounceIn 0.5s ease-out;
}

.hint {
    color: #590d22;
    opacity: 0.5;
    font-size: 0.9rem;
    margin-top: 1rem;
}

.attempt-counter {
    margin-top: 1rem;
    color: #590d22;
    font-weight: 600;
    font-size: 0.95rem;
    min-height: 25px;
}

/* Success screen */
.success-emoji {
    font-size: 8rem;
    animation: bounce 1s ease-out;
    margin-bottom: 1rem;
}

.success-title {
    font-size: 2.5rem;
    color: #ff4d6d;
    font-weight: 900;
    margin-bottom: 1.5rem;
    animation: bounceIn 0.6s ease-out;
}

.success-message {
    background: rgba(255, 240, 243, 0.8);
    border-radius: 20px;
    padding: 2rem;
    margin-bottom: 1.5rem;
}

.success-message p {
    color: #590d22;
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.heart-row {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin: 1.5rem 0;
}

.beating-heart {
    font-size: 2.5rem;
    display: inline-block;
    animation: heartbeat 1s ease-in-out infinite;
}

.beating-heart:nth-child(2) {
    animation-delay: 0.2s;
}

.beating-heart:nth-child(3) {
    animation-delay: 0.4s;
}

.love-quote {
    font-style: italic;
    color: #ff4d6d;
    font-size: 1rem;
    margin-top: 1rem;
}

.stats-message {
    background: rgba(255, 77, 109, 0.1);
    border-radius: 15px;
    padding: 1rem;
    margin-bottom: 1.5rem;
    color: #590d22;
    font-size: 0.95rem;
}

.btn-replay {
    background: transparent;
    color: #ff4d6d;
    border: 2px solid #ff4d6d;
    margin-bottom: 1.5rem;
}

.btn-replay:hover {
    background: #ff4d6d;
    color: white;
    transform: scale(1.05);
}

/* Share section */
.share-section {
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 2px dashed rgba(255, 77, 109, 0.3);
}

.share-text {
    color: #590d22;
    font-weight: 600;
    margin-bottom: 0.8rem;
}

.share-input {
    width: 100%;
    padding: 0.8rem;
    border: 2px solid #ff4d6d;
    border-radius: 10px;
    font-family: 'Poppins', sans-serif;
    font-size: 0.9rem;
    margin-bottom: 0.8rem;
    text-align: center;
    background: rgba(255, 255, 255, 0.8);
}

.btn-copy {
    background: linear-gradient(135deg, #ff4d6d 0%, #ff758f 100%);
    font-size: 1rem;
    padding: 0.8rem 2rem;
}

.btn-copy:hover {
    transform: scale(1.05);
}

/* Header Credit at Top */
.header-credit {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    padding: 1rem;
    text-align: center;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border-bottom: 2px solid rgba(255, 77, 109, 0.2);
    box-shadow: 0 2px 20px rgba(255, 77, 109, 0.15);
}

.header-credit p {
    color: #590d22;
    font-size: 0.9rem;
    font-weight: 500;
    margin: 0;
    letter-spacing: 0.5px;
}

.creator-name {
    color: #ff4d6d;
    font-weight: 900;
    font-size: 1.1rem;
    text-shadow: 0 0 15px rgba(255, 77, 109, 0.6);
    animation: headerGlow 2.5s ease-in-out infinite;
    padding: 0 0.3rem;
    display: inline-block;
}

@keyframes headerGlow {
    0%, 100% {
        text-shadow: 0 0 15px rgba(255, 77, 109, 0.6);
        transform: scale(1);
    }
    50% {
        text-shadow: 0 0 25px rgba(255, 77, 109, 1), 0 0 35px rgba(255, 77, 109, 0.7);
        transform: scale(1.05);
    }
}

/* Animations */
@keyframes cardEntrance {
    0% {
        opacity: 0;
        transform: scale(0.8) translateY(50px);
    }
    100% {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes heartbeat {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.15);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
    }
    50% {
        transform: translateY(-20px) rotate(10deg);
    }
}

@keyframes floatUp {
    0% {
        transform: translateY(100vh) scale(1) rotate(0deg);
        opacity: 0.8;
    }
    100% {
        transform: translateY(-10vh) scale(0.8) rotate(360deg);
        opacity: 0;
    }
}

@keyframes glow {
    0%, 100% {
        text-shadow: 2px 2px 4px rgba(255, 77, 109, 0.3);
    }
    50% {
        text-shadow: 0 0 20px rgba(255, 77, 109, 0.8);
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

@keyframes pulseGlow {
    0%, 100% {
        box-shadow: 0 8px 25px rgba(255, 77, 109, 0.4);
    }
    50% {
        box-shadow: 0 8px 40px rgba(255, 77, 109, 0.7);
    }
}

@keyframes bounceIn {
    0% {
        opacity: 0;
        transform: scale(0.3);
    }
    50% {
        opacity: 1;
        transform: scale(1.05);
    }
    70% {
        transform: scale(0.9);
    }
    100% {
        transform: scale(1);
    }
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-30px);
    }
    60% {
        transform: translateY(-15px);
    }
}

/* Responsive */
@media (max-width: 640px) {
    .container {
        padding-top: 60px; /* Adjust for mobile header */
    }
    
    .header-credit {
        padding: 0.75rem 0.5rem;
    }
    
    .header-credit p {
        font-size: 0.75rem;
    }
    
    .creator-name {
        font-size: 0.95rem;
    }
    
    .card {
        padding: 2rem 1.5rem;
        width: 95%;
        margin: 1rem auto;
    }
    
    .title {
        font-size: 1.5rem;
    }
    
    .valentine-text {
        font-size: 2rem;
    }
    
    .main-emoji {
        font-size: 4rem;
    }
    
    .btn {
        font-size: 1rem;
        padding: 0.8rem 2rem;
        width: 100%;
        max-width: 250px;
    }
    
    .button-container {
        flex-direction: column;
        gap: 1rem;
        min-height: 150px;
    }
    
    .success-title {
        font-size: 2rem;
    }
    
    .success-message p {
        font-size: 1rem;
    }
}

@media (max-width: 400px) {
    .header-credit p {
        font-size: 0.65rem;
    }
    
    .creator-name {
        font-size: 0.85rem;
    }
    
    .card {
        padding: 1.5rem 1rem;
    }
    
    .title {
        font-size: 1.3rem;
    }
    
    .valentine-text {
        font-size: 1.8rem;
    }
}

/* Confetti */
.confetti {
    position: fixed;
    width: 10px;
    height: 10px;
    top: -10px;
    z-index: 9999;
    animation: confettiFall linear forwards;
}

@keyframes confettiFall {
    to {
        transform: translateY(100vh) rotate(360deg);
        opacity: 0;
    }
}

/* Shake animation */
@keyframes shake {
    0%, 100% {
        transform: translateX(0);
    }
    10%, 30%, 50%, 70%, 90% {
        transform: translateX(-5px);
    }
    20%, 40%, 60%, 80% {
        transform: translateX(5px);
    }
}

.shake {
    animation: shake 0.5s ease-in-out;
}

/* Screen shake effect */
.screen-shake {
    animation: screenShake 0.5s ease-in-out;
}

@keyframes screenShake {
    0%, 100% {
        transform: translate(0, 0);
    }
    10%, 30%, 50%, 70%, 90% {
        transform: translate(-5px, -5px);
    }
    20%, 40%, 60%, 80% {
        transform: translate(5px, 5px);
    }
}

/* Explosion particles */
.explosion-particle {
    position: fixed;
    width: 8px;
    height: 8px;
    background: radial-gradient(circle, #ff4d6d, #ff758f);
    border-radius: 50%;
    pointer-events: none;
    z-index: 10000;
    animation: explode 1s ease-out forwards;
}

@keyframes explode {
    0% {
        transform: translate(0, 0) scale(1);
        opacity: 1;
    }
    100% {
        transform: translate(var(--tx), var(--ty)) scale(0);
        opacity: 0;
    }
}

/* Firework particles */
.firework-particle {
    position: fixed;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    pointer-events: none;
    z-index: 10000;
    animation: firework 1.5s ease-out forwards;
}

@keyframes firework {
    0% {
        transform: translate(0, 0) scale(1);
        opacity: 1;
    }
    100% {
        transform: translate(var(--tx), var(--ty)) scale(0);
        opacity: 0;
    }
}

/* Heart burst effect */
.heart-burst {
    position: fixed;
    pointer-events: none;
    z-index: 10000;
    animation: heartBurst 2s ease-out forwards;
}

@keyframes heartBurst {
    0% {
        transform: translate(-50%, -50%) scale(0) rotate(0deg);
        opacity: 1;
    }
    50% {
        transform: translate(calc(-50% + var(--tx)), calc(-50% + var(--ty))) scale(1.5) rotate(180deg);
        opacity: 1;
    }
    100% {
        transform: translate(calc(-50% + var(--tx)), calc(-50% + var(--ty))) scale(0.5) rotate(360deg);
        opacity: 0;
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}