:root {
    --bg-color: #f7f5f0;          /* Warm beige/cream paper tone */
    --text-color: #2d3436;        /* Soft charcoal black */
    --text-muted: #7f8c8d;       /* Soft grey for tags/subtitles */
    --gold-color: #c5a059;       /* Delicate champagne gold */
    --gold-glow: rgba(197, 160, 89, 0.2);
    
    --card-bg-light: #fffdfa;    /* Premium cream paper card front */
    --card-bg-dark: #1a252c;     /* Deep slate-blue/navy card back */
    
    --shadow-soft: 0 10px 30px rgba(0, 0, 0, 0.04);
    --shadow-card: 0 15px 35px rgba(26, 37, 44, 0.08);
    --shadow-card-hover: 0 20px 45px rgba(197, 160, 89, 0.15);
    
    --font-heading: 'Cinzel', serif;
    --font-jp: 'Zen Old Mincho', serif;
    --font-ui: 'Outfit', sans-serif;
}

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

body {
    margin: 0;
    padding: 0;
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-ui), sans-serif;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow-x: hidden;
    letter-spacing: 0.03em;
}

/* Wrapper to center content and maintain vertical flow */
.wrapper {
    width: 100%;
    max-width: 480px;
    padding: 2rem 1.5rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100vh;
    justify-content: space-between;
}

/* Header Styling */
header {
    text-align: center;
    margin-bottom: 2rem;
    width: 100%;
}

.header-container {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.site-tagline {
    font-family: var(--font-heading);
    font-size: 0.75rem;
    letter-spacing: 0.3em;
    color: var(--gold-color);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
}

.site-title {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    font-weight: 400;
    margin: 0 0 0.4rem 0;
    letter-spacing: 0.05em;
}

.site-subtitle {
    font-family: var(--font-jp);
    font-size: 0.85rem;
    color: var(--text-muted);
    margin: 0;
    letter-spacing: 0.1em;
}

/* Main Area containing Card and Actions */
main {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 100%;
    gap: 2.5rem;
}

/* Card Perspective container */
.card-area {
    width: 100%;
    display: flex;
    justify-content: center;
    perspective: 1500px; /* Essential for 3D flip */
}

.card-perspective {
    width: 300px;
    height: 450px;
    position: relative;
    cursor: pointer;
}

/* Actual Card Node */
.oracle-card {
    width: 100%;
    height: 100%;
    position: absolute;
    transform-style: preserve-3d;
    transition: transform 0.8s cubic-bezier(0.175, 0.885, 0.32, 1.15), box-shadow 0.4s ease;
    border-radius: 16px;
    box-shadow: var(--shadow-card);
}

.card-perspective:hover .oracle-card {
    transform: translateY(-8px);
    box-shadow: var(--shadow-card-hover);
}

/* Toggle flip class on card */
.oracle-card.flipped {
    transform: rotateY(180deg);
}

.card-perspective:hover .oracle-card.flipped {
    transform: rotateY(180deg) translateY(-8px);
}

/* Front & Back Faces */
.card-face {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden; /* Hide the back when rotated */
    border-radius: 16px;
    overflow: hidden;
    padding: 12px;
}

/* Card Borders (Shared) */
.card-border-outer {
    width: 100%;
    height: 100%;
    border-radius: 12px;
    padding: 8px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.card-border-inner {
    width: 100%;
    height: 100%;
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    position: relative;
}

/* Card BACK (Facedown State) */
.card-back {
    background-color: var(--card-bg-dark);
    color: var(--gold-color);
}

.card-back .card-border-outer {
    border: 1px solid var(--gold-color);
}

.card-back .card-border-inner {
    border: 1px solid var(--gold-color);
    background-color: var(--card-bg-dark);
}

.card-pattern {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 100%;
    width: 100%;
}

.celestial-symbol {
    width: 130px;
    height: 130px;
    margin-bottom: 2rem;
    filter: drop-shadow(0 0 8px var(--gold-glow));
}

.card-back-title {
    font-family: var(--font-heading);
    font-size: 0.8rem;
    letter-spacing: 0.4em;
    text-indent: 0.4em;
    opacity: 0.7;
    margin-top: 1rem;
}

/* Card FRONT (Revealed State) */
.card-front {
    background-color: var(--card-bg-light);
    color: var(--text-color);
    transform: rotateY(180deg); /* Flipped initially relative to container orientation */
}

.card-front .card-border-outer {
    border: 1px solid rgba(197, 160, 89, 0.4);
}

.card-front .card-border-inner {
    border: 1px dashed rgba(197, 160, 89, 0.5);
    background-color: var(--card-bg-light);
}

.card-content-front {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    height: 100%;
    padding: 1.5rem 1rem;
    text-align: center;
}

.card-decor-top, .card-decor-bottom {
    font-size: 0.9rem;
    color: var(--gold-color);
    opacity: 0.8;
}

.prompt-text-container {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 0 0.5rem;
}

.prompt-text {
    font-family: var(--font-jp);
    font-size: 1.15rem;
    line-height: 2;
    color: var(--text-color);
    margin: 0;
    word-break: break-all;
    letter-spacing: 0.08em;
    /* Simulate elegant calligraphy feel */
    font-weight: 500;
}

/* Action Area for buttons */
.action-area {
    width: 100%;
    display: flex;
    justify-content: center;
}

/* Button styling matching the minimal aesthetic */
.draw-button {
    font-family: var(--font-jp);
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-color);
    background-color: transparent;
    border: 1px solid rgba(45, 52, 54, 0.15);
    border-radius: 30px;
    padding: 0.9rem 2.8rem;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    outline: none;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.02);
    letter-spacing: 0.1em;
}

.draw-button:hover {
    background-color: var(--text-color);
    color: var(--bg-color);
    border-color: var(--text-color);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(45, 52, 54, 0.1);
}

.draw-button:active {
    transform: translateY(0);
}

/* Loading State */
.loading .oracle-card {
    opacity: 0.6;
}

/* Footer Styling */
footer {
    width: 100%;
    text-align: center;
    margin-top: 2rem;
}

.footer-container {
    padding-top: 1rem;
    border-top: 1px solid rgba(45, 52, 54, 0.05);
}

.copyright {
    font-size: 0.7rem;
    color: var(--text-muted);
    margin: 0;
    opacity: 0.8;
}

/* Mobile responsive adjustments */
@media (max-height: 700px) {
    .wrapper {
        padding: 1rem 1.5rem;
    }
    header {
        margin-bottom: 1rem;
    }
    .site-title {
        font-size: 1.5rem;
    }
    .card-perspective {
        width: 260px;
        height: 390px;
    }
    main {
        gap: 1.5rem;
    }
    .prompt-text {
        font-size: 1.05rem;
        line-height: 1.8;
    }
}