:root {
    --deep-purple: #000000;
    --cosmic-purple: #1D0652;
    --royal-purple: #3A0CA3;
    --mystical-pink: #CF1259;
    --gold: #f4d03f;
    --star-white: #fef6e4;
    
    --card-back-gradient: linear-gradient(135deg, #1D0652 0%, #000 100%);
    --button-gradient: linear-gradient(135deg, #f4d03f 0%, #CF1259 100%);
    --title-gradient: linear-gradient(135deg, #f4d03f 0%, #CF1259 50%, #f4d03f 100%);
    --card-front-gradient: linear-gradient(135deg, #000 0%, #1D0652 100%);
    
    --font-display: 'love', serif;
    --font-body: 'default', serif;
    
    /* fancy CLAMMP function from copilot //// min value, preferred value, maximum value */
    --title-size: clamp(4rem, 6vw, 9rem);
    --subtitle-size: clamp(1rem, 2.5vw, 1.5rem);

    /* rem - relative unit of mesuring (we can also have EM */
    --couple-names-size: 2rem;
    --card-title-size: 1.5rem;
    --card-meaning-size: 1rem;
    --label-size: 1.2rem;
    --input-size: 1.1rem;
    --button-size: 1.3rem;
    
    --container-padding: 2rem;
    --input-section-padding: 3rem 2rem;
    --card-gap: 2rem;
    
    --border-radius-large: 20px;
    --border-radius-medium: 16px;
    --border-radius-small: 12px;
    --border-radius-button: 50px;
    --border-width: 2px;
    --border-width-thick: 3px;
    
    --transition-fast: 0.3s ease;
    --transition-medium: 0.8s cubic-bezier(0.4, 0.0, 0.2, 1);
    --transition-slow: 1s ease-out;
}

@font-face {
    font-family: 'love';
    src: url(fonts/LOVELETTERS.ttf);
}

@font-face {
    font-family: 'default';
    src: url(fonts/AutourOne-Regular.ttf);
}

/* fix text input going off */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-body);
    background: var(--deep-purple);
    background-image: url(img/red.jpg);
    color: var(--star-white);
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

.stars {
    position: fixed;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    z-index: 0;
    pointer-events: none;
}

.star {
    position: absolute;
    width: 2px;
    height: 2px;
    background: white;
    border-radius: 50%;
    animation: twinkle 3s infinite;
}

.container {
    position: relative;
    z-index: 1;
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--container-padding);
}












header {
    text-align: center;
    margin-bottom: 3rem;
    animation: fadeInDown var(--transition-slow);
}

h1 {
    font-family: var(--font-display);
    font-size: var(--title-size);
    font-weight: 900;
    background: var(--title-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 1rem;
    letter-spacing: 0.05em;
    text-shadow: 0 0 40px rgba(244, 208, 63, 0.3);
}

.subtitle {
    font-size: var(--subtitle-size);
    color: var(--gold);
    font-style: italic;
    opacity: 0.9;
    letter-spacing: 0.15em;
}















.input-section {
    background: #12053167;
    backdrop-filter: blur(10px);
    border: var(--border-width) solid rgba(244, 208, 63, 0.3);
    border-radius: var(--border-radius-large);
    padding: var(--input-section-padding);
    margin-bottom: 3rem;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    animation: fadeInUp var(--transition-slow) 0.2s both;
}

.input-section.hidden {
    display: none;
}

.input-group {
    margin-bottom: 2rem;
}

label {
    display: block;
    font-size: var(--label-size);
    margin-bottom: 0.5rem;
    color: var(--gold);
    font-weight: 600;
    letter-spacing: 0.05em;
}

input[type="text"] {
    width: 100%;
    padding: 1rem 1.5rem;
    font-size: var(--input-size);
    font-family: var(--font-body);
    background: rgba(26, 8, 49, 0.8);
    border: var(--border-width) solid rgba(244, 208, 63, 0.4);
    border-radius: var(--border-radius-small);
    color: var(--star-white);
    transition: all var(--transition-fast);
}

input[type="text"]:focus {
    outline: none;
    border-color: var(--gold);
    box-shadow: 0 0 20px rgba(244, 208, 63, 0.3);
}

input[type="text"]::placeholder {
    color: rgba(254, 246, 228, 0.4);
}














.btn {
    background: var(--button-gradient);
    color: var(--deep-purple);
    border: none;
    padding: 1.2rem 3rem;
    font-size: var(--button-size);
    font-family: var(--font-display);
    font-weight: 700;
    border-radius: var(--border-radius-button);
    cursor: pointer;
    transition: all var(--transition-fast);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    box-shadow: 0 4px 20px rgba(244, 208, 63, 0.4);
    display: block;
    margin: 0 auto;
}

.btn:hover {
    transform: translateY(-2px) scale(1.05);
    box-shadow: 0 8px 30px rgba(244, 208, 63, 0.6);
}

.btn:active {
    transform: translateY(0) scale(1);
}

















.reading-section {
    display: none;
    animation: fadeInUp var(--transition-slow);
}

.reading-section.visible {
    display: block;
}

.couple-names {
    text-align: center;
    font-size: var(--couple-names-size);
    margin-bottom: 2rem;
    color: var(--gold);
    font-weight: 600;
}

.couple-names .heart {
    display: inline-block;
    color: var(--mystical-pink);
    margin: 0 1rem;
    animation: heartbeat 1.5s ease-in-out infinite;
}



















.cards-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--card-gap);
    margin-bottom: 3rem;
}

.card-wrapper {
    perspective: 1000px;
    animation: cardSlideIn 0.8s ease-out both;
    display: inline-block;
    width: 100%;
}

.card-wrapper:nth-child(1) { animation-delay: 0.2s; }
.card-wrapper:nth-child(2) { animation-delay: 0.4s; }
.card-wrapper:nth-child(3) { animation-delay: 0.6s; }

.card {
    position: relative;
    width: 100%;
    aspect-ratio: 2/3;
    cursor: pointer;
    transform-style: preserve-3d;
    -webkit-transform-style: preserve-3d;
    transform-origin: center center;
    -webkit-transform-origin: center center;
    will-change: transform;
    z-index: 1;
    transition: transform var(--transition-medium);
}

.card.flipped {
    transform: rotateY(180deg);
    z-index: 2;
}

.card-face {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    top: 0;
    left: 0;
    border-radius: var(--border-radius-medium);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
}









.card-back {
    background: var(--card-back-gradient);
    border: var(--border-width-thick) solid var(--gold);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.card-back::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 60%;
    height: 80%;
    transform: translate(-50%, -50%);
    opacity: 0.3;
    animation: pulse 2s ease-in-out infinite;
}

.card-back-symbol {
    font-size: 4rem;
    color: var(--gold);
    z-index: 1;
}


.card-front {
    background: var(--card-front-gradient);
    border: var(--border-width-thick) solid var(--gold);
    transform: rotateY(180deg);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.card-label {
    font-size: 0.9rem;
    color: var(--gold);
    text-transform: uppercase;
    letter-spacing: 0.2em;
    margin-bottom: 1rem;
    font-weight: 600;
}

.card-title {
    font-family: var(--font-display);
    font-size: var(--card-title-size);
    color: var(--star-white);
    margin-bottom: 1rem;
    font-weight: 700;
}

.card-emoji {
    font-size: 3rem;
    margin: 1rem 0;
}

.card-meaning {
    font-size: var(--card-meaning-size);
    line-height: 1.6;
    color: var(--star-white);
    opacity: 0.9;
    flex-grow: 1;
    display: flex;
    align-items: center;
}









.final-reading {
    background: rgba(45, 27, 61, 0.6);
    backdrop-filter: blur(10px);
    border: var(--border-width) solid rgba(244, 208, 63, 0.3);
    border-radius: var(--border-radius-large);
    padding: var(--input-section-padding);
    margin-top: 3rem;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    opacity: 0;
    animation: fadeInUp var(--transition-slow) 1.5s both;
}

.final-reading h2 {
    font-family: var(--font-display);
    font-size: 2rem;
    color: var(--gold);
    margin-bottom: 1.5rem;
    text-align: center;
}

.final-reading p {
    font-size: 1.2rem;
    line-height: 1.8;
    margin-bottom: 1rem;
    text-align: center;
}

.reset-btn {
    margin-top: 2rem;
    background: linear-gradient(135deg, var(--mystical-pink) 0%, var(--royal-purple) 100%);
    color: var(--star-white);
}








/* stars */
@keyframes twinkle {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 1; }
}
@keyframes cardSlideIn {
    from {
        opacity: 0;
        transform: translateY(50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}
@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}
@keyframes pulse {
    0%, 100% { 
        opacity: 0.3; 
        transform: translate(-50%, -50%) scale(1); 
    }
    50% { 
        opacity: 0.5; 
        transform: translate(-50%, -50%) scale(1.1); 
    }
}












@media (max-width: 768px) {
    :root {
        --container-padding: 1rem;
        --input-section-padding: 2rem 1.5rem;
        --card-gap: 1.5rem;
    }

    .cards-container {
        grid-template-columns: 1fr;
    }
}