/* ========================================
   CSS Variables / Theme
   ======================================== */
:root {
    --blush: #FFB6C1;
    --rose: #FF69B4;
    --deep-rose: #DB7093;
    --cream: #FFF5F7;
    --soft-pink: #FFE4EC;
    --heart-red: #FF1744;
    --gold: #FFD700;
}

/* ========================================
   Base Styles
   ======================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    min-height: 100vh;
    font-family: 'Quicksand', sans-serif;
    background: linear-gradient(135deg, var(--cream) 0%, var(--soft-pink) 50%, var(--blush) 100%);
    overflow-x: hidden;
    position: relative;
}

body.letter-open {
    overflow: hidden;
}

/* ========================================
   Floating Hearts Background
   ======================================== */
.hearts-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    overflow: hidden;
    z-index: 0;
}

.floating-heart {
    position: absolute;
    opacity: 0.6;
    animation: floatUp linear infinite;
    filter: drop-shadow(0 2px 4px rgba(255, 105, 180, 0.3));
}

@keyframes floatUp {
    0% {
        transform: translateY(100vh) rotate(0deg) scale(1);
        opacity: 0;
    }
    10% {
        opacity: 0.6;
    }
    90% {
        opacity: 0.6;
    }
    100% {
        transform: translateY(-100px) rotate(360deg) scale(0.8);
        opacity: 0;
    }
}

/* Floating Photos */
.floating-photo {
    position: absolute;
    width: 80px;
    height: 80px;
    opacity: 0;
    animation: floatUpPhoto linear infinite;
    filter: drop-shadow(0 4px 8px rgba(219, 112, 147, 0.4));
    border-radius: 10px;
    overflow: hidden;
    border: 3px solid white;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
    transform: rotate(var(--rotation, 0deg));
}

.floating-photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

@keyframes floatUpPhoto {
    0% {
        transform: translateY(100vh) rotate(var(--rotation, 0deg)) scale(0.8);
        opacity: 0;
    }
    5% {
        opacity: 0.85;
    }
    85% {
        opacity: 0.85;
    }
    100% {
        transform: translateY(-150px) rotate(calc(var(--rotation, 0deg) + 15deg)) scale(1);
        opacity: 0;
    }
}

/* ========================================
   Sparkle Effect
   ======================================== */
.sparkle {
    position: fixed;
    width: 4px;
    height: 4px;
    background: var(--gold);
    border-radius: 50%;
    pointer-events: none;
    animation: sparkle 1.5s ease-in-out infinite;
}

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

/* ========================================
   Main Container
   ======================================== */
.main-container {
    position: relative;
    z-index: 1;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    overflow: visible;
}

/* ========================================
   Valentine Card
   ======================================== */
.valentine-card {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 30px;
    padding: 3rem;
    max-width: 600px;
    width: 100%;
    box-shadow:
        0 25px 80px rgba(219, 112, 147, 0.3),
        0 10px 30px rgba(255, 105, 180, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.8);
    text-align: center;
    position: relative;
    overflow: visible;
    animation: cardEntrance 1s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes cardEntrance {
    0% {
        opacity: 0;
        transform: translateY(50px) scale(0.9);
    }
    100% {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.valentine-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 182, 193, 0.2) 0%, transparent 70%);
    animation: shimmer 8s linear infinite;
    pointer-events: none;
}

@keyframes shimmer {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* ========================================
   Corner Hearts
   ======================================== */
.corner-heart {
    position: absolute;
    font-size: 2rem;
    opacity: 0.3;
    animation: pulse 2s ease-in-out infinite;
}

.corner-heart.top-left { top: 15px; left: 20px; animation-delay: 0s; }
.corner-heart.top-right { top: 15px; right: 20px; animation-delay: 0.5s; }
.corner-heart.bottom-left { bottom: 15px; left: 20px; animation-delay: 1s; }
.corner-heart.bottom-right { bottom: 15px; right: 20px; animation-delay: 1.5s; }

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.2); }
}

/* ========================================
   Photo Carousel
   ======================================== */
.carousel-container {
    position: relative;
    width: 100%;
    max-width: 520px;
    margin: 0 auto 2rem;
    overflow: hidden;
    border-radius: 25px;
    z-index: 1;
}

.carousel-track {
    display: flex;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.carousel-slide {
    min-width: calc(100% / 3);
    padding: 0.5rem;
    box-sizing: border-box;
}

.photo-frame {
    width: 100%;
    aspect-ratio: 1;
    border-radius: 20px;
    overflow: hidden;
    border: 4px solid var(--blush);
    box-shadow:
        0 8px 25px rgba(219, 112, 147, 0.3),
        inset 0 0 20px rgba(255, 182, 193, 0.3);
    transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
    position: relative;
    background: linear-gradient(135deg, var(--soft-pink), var(--blush));
}

.photo-frame:hover {
    transform: scale(1.05);
    border-color: var(--rose);
    box-shadow:
        0 12px 35px rgba(219, 112, 147, 0.4),
        inset 0 0 25px rgba(255, 182, 193, 0.4);
}

.photo-frame img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.photo-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--deep-rose);
    font-size: 0.8rem;
    padding: 1rem;
}

.photo-placeholder .heart-icon {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    animation: heartbeat 1.5s ease-in-out infinite;
}

@keyframes heartbeat {
    0%, 100% { transform: scale(1); }
    15% { transform: scale(1.15); }
    30% { transform: scale(1); }
    45% { transform: scale(1.1); }
    60% { transform: scale(1); }
}

/* ========================================
   Typography
   ======================================== */
.title {
    font-family: 'Playfair Display', serif;
    font-size: 2.5rem;
    color: var(--deep-rose);
    margin-bottom: 0.5rem;
    position: relative;
    z-index: 1;
    animation: titleFade 1.2s ease-out 0.3s both;
}

@keyframes titleFade {
    0% { opacity: 0; transform: translateY(20px); }
    100% { opacity: 1; transform: translateY(0); }
}

.subtitle {
    font-family: 'Playfair Display', serif;
    font-style: italic;
    font-size: 1.2rem;
    color: var(--rose);
    margin-bottom: 2rem;
    position: relative;
    z-index: 1;
    animation: titleFade 1.2s ease-out 0.5s both;
}

.question {
    font-family: 'Playfair Display', serif;
    font-size: 2.2rem;
    color: var(--deep-rose);
    margin-bottom: 2rem;
    line-height: 1.4;
    position: relative;
    z-index: 1;
    animation: titleFade 1.2s ease-out 0.7s both;
}

/* ========================================
   Are You Sure Message
   ======================================== */
.are-you-sure {
    font-family: 'Quicksand', sans-serif;
    font-size: 1.2rem;
    color: var(--rose);
    margin-bottom: 1.5rem;
    opacity: 0;
    transform: translateY(-10px);
    transition: all 0.4s ease;
    position: relative;
    z-index: 1;
}

.are-you-sure.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ========================================
   Buttons
   ======================================== */
.buttons-container {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    position: relative;
    z-index: 1;
    min-height: 100px;
    animation: titleFade 1.2s ease-out 0.9s both;
}

/* Yes Button */
.btn-yes {
    background: linear-gradient(135deg, var(--rose) 0%, var(--heart-red) 100%);
    color: white;
    border: none;
    padding: 1rem 2.5rem;
    font-family: 'Quicksand', sans-serif;
    font-size: 1.3rem;
    font-weight: 600;
    border-radius: 50px;
    cursor: pointer;
    box-shadow:
        0 8px 25px rgba(255, 23, 68, 0.4),
        0 4px 10px rgba(255, 105, 180, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.3);
    transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
    position: relative;
    overflow: hidden;
}

.btn-yes::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.5s;
}

.btn-yes:hover::before {
    left: 100%;
}

.btn-yes:hover {
    transform: translateY(-3px) scale(1.05);
    box-shadow:
        0 12px 35px rgba(255, 23, 68, 0.5),
        0 6px 15px rgba(255, 105, 180, 0.4);
}

/* No Button */
.btn-no {
    background: linear-gradient(135deg, #f0f0f0 0%, #e0e0e0 100%);
    color: #888;
    border: none;
    padding: 0.8rem 1.8rem;
    font-family: 'Quicksand', sans-serif;
    font-size: 1rem;
    font-weight: 500;
    border-radius: 50px;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    position: relative;
}

.btn-no:hover {
    background: linear-gradient(135deg, #e8e8e8 0%, #d8d8d8 100%);
}

/* ========================================
   Success State
   ======================================== */
.success-container {
    display: none;
    flex-direction: column;
    align-items: center;
    animation: successPop 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
    overflow: visible;
}

.success-container.visible {
    display: flex;
}

@keyframes successPop {
    0% { opacity: 0; transform: scale(0.5); }
    100% { opacity: 1; transform: scale(1); }
}

.success-heart {
    font-size: 5rem;
    animation: heartbeat 1s ease-in-out infinite;
    margin-bottom: 1rem;
}

.success-message {
    font-family: 'Playfair Display', serif;
    font-size: 2.5rem;
    color: var(--heart-red);
    margin-bottom: 0.5rem;
}

.success-submessage {
    font-family: 'Quicksand', sans-serif;
    font-size: 1.2rem;
    color: var(--rose);
}

/* ========================================
   Love Letter Envelope
   ======================================== */
.envelope-wrapper {
    margin-top: 2rem;
    perspective: 1000px;
    animation: envelopeAppear 0.8s ease-out 0.5s both;
    overflow: visible;
}

@keyframes envelopeAppear {
    0% {
        opacity: 0;
        transform: translateY(30px) scale(0.9);
    }
    100% {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.envelope {
    position: relative;
    width: 320px;
    height: 220px;
    margin: 0 auto;
    cursor: pointer;
    transform-style: preserve-3d;
}

.envelope.opened {
    overflow: visible;
}

.envelope-hint {
    text-align: center;
    font-family: 'Quicksand', sans-serif;
    font-size: 1rem;
    color: var(--rose);
    margin-top: 1rem;
    animation: hintPulse 2s ease-in-out infinite;
    transition: opacity 0.3s ease;
}

@keyframes hintPulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.envelope-hint.hidden {
    opacity: 0;
}

/* Envelope pocket (front bottom part) */
.envelope-pocket {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 60%;
    background: linear-gradient(180deg, #FFB6C1 0%, #FF91A4 100%);
    border-radius: 0 0 15px 15px;
    border: 3px solid #FF7B9C;
    border-top: none;
    z-index: 3;
    box-shadow: 0 8px 25px rgba(219, 112, 147, 0.3);
}

.envelope-pocket::before {
    content: '💕';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 2rem;
    opacity: 0.6;
}

/* Envelope flap (triangular top) */
.envelope-flap {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 55%;
    background: linear-gradient(180deg, #FFC1CC 0%, #FFB6C1 100%);
    clip-path: polygon(0 0, 50% 100%, 100% 0);
    border: 3px solid #FF7B9C;
    z-index: 4;
    transform-origin: top center;
    transition: transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 5px 15px rgba(219, 112, 147, 0.2);
}

.envelope-flap::after {
    content: '❤️';
    position: absolute;
    top: 25%;
    left: 50%;
    transform: translateX(-50%);
    font-size: 1.5rem;
    transition: opacity 0.3s ease;
}

/* The letter inside */
.letter {
    position: absolute;
    top: 10%;
    left: 50%;
    transform: translateX(-50%);
    width: 90%;
    background: linear-gradient(145deg, #FFFAFA 0%, #FFF5F7 100%);
    border-radius: 10px;
    z-index: 2;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    max-height: 180px;
    overflow: hidden;
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
    transition-delay: 0.3s;
}

.letter-inner {
    padding: 1.25rem;
    opacity: 0;
    transform: translateY(10px);
    transition: all 0.5s ease;
    transition-delay: 0.8s;
}

/* Opened state */
.envelope.opened .envelope-flap {
    transform: rotateX(-180deg);
}

.envelope.opened .envelope-flap::after {
    opacity: 0;
}

.envelope.opened .letter {
    opacity: 0;
    pointer-events: none;
}

/* Letter when moved to body as modal */
.letter-modal {
    position: fixed !important;
    top: 1rem !important;
    left: 50% !important;
    transform: translateX(-50%) !important;
    width: 60vw !important;
    max-width: none !important;
    height: 80vh !important;
    max-height: none !important;
    overflow-y: auto !important;
    box-shadow: 0 20px 60px rgba(219, 112, 147, 0.4) !important;
    z-index: 1001 !important;
    border-radius: 15px !important;
    background: linear-gradient(145deg, #FFFAFA 0%, #FFF5F7 100%) !important;
}

/* Custom scrollbar for the letter */
.letter-modal::-webkit-scrollbar {
    width: 8px;
}

.letter-modal::-webkit-scrollbar-track {
    background: var(--soft-pink);
    border-radius: 4px;
}

.letter-modal::-webkit-scrollbar-thumb {
    background: var(--blush);
    border-radius: 4px;
}

.letter-modal::-webkit-scrollbar-thumb:hover {
    background: var(--rose);
}

/* Backdrop overlay */
.envelope.opened::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(255, 182, 193, 0.3);
    backdrop-filter: blur(3px);
    z-index: 999;
}

.envelope.opened .letter-inner,
.letter-modal .letter-inner {
    opacity: 1;
    transform: translateY(0);
    padding: 2rem;
}

/* Love note content styles */
.love-note-header {
    font-family: 'Playfair Display', serif;
    font-size: 1.2rem;
    color: var(--deep-rose);
    text-align: center;
    margin-bottom: 0.75rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px dashed var(--blush);
}

.love-note-content {
    font-family: 'Quicksand', sans-serif;
    font-size: 0.95rem;
    line-height: 1.7;
    color: #555;
    text-align: left;
}

.love-note-content p {
    margin-bottom: 0.75rem;
}

.love-note-content p:last-child {
    margin-bottom: 0;
}

.love-note-signature {
    text-align: center;
    font-family: 'Playfair Display', serif;
    font-style: italic;
    color: var(--deep-rose);
    margin-top: 1rem;
    font-size: 1rem;
}

/* ========================================
   Heart Explosion
   ======================================== */
.heart-explosion {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 100;
}

.explosion-heart {
    position: absolute;
    font-size: 2rem;
    animation: explode 2s ease-out forwards;
}

@keyframes explode {
    0% {
        opacity: 1;
        transform: translate(0, 0) scale(1) rotate(0deg);
    }
    100% {
        opacity: 0;
        transform: translate(var(--tx), var(--ty)) scale(0) rotate(720deg);
    }
}

/* ========================================
   State Classes
   ======================================== */
.initial-content.hidden {
    display: none;
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 600px) {
    .valentine-card {
        padding: 2rem 1.5rem;
        margin: 1rem;
    }

    .title {
        font-size: 1.8rem;
    }

    .question {
        font-size: 1.6rem;
    }

    .carousel-container {
        max-width: 100%;
    }

    .carousel-slide {
        min-width: calc(100% / 2);
    }

    .buttons-container {
        flex-direction: column;
    }

    .envelope {
        width: 280px;
        height: 190px;
    }

    .letter-modal {
        width: 90vw !important;
        height: 80vh !important;
    }

    .letter-inner {
        padding: 1rem;
    }

    .love-note-header {
        font-size: 1.1rem;
    }

    .love-note-content {
        font-size: 0.9rem;
    }
}

@media (max-width: 400px) {
    .carousel-slide {
        min-width: 100%;
    }
}