:root {
    --bg-color: #fdfbf7;
    --card-back: #ffb7b2;
    --card-front: #ffffff;
    --accent: #e63946;
    --text-main: #2b2d42;
    --text-light: #8d99ae;
    --shadow-soft: 0 10px 20px rgba(0, 0, 0, 0.05);
    --shadow-hover: 0 15px 30px rgba(230, 57, 70, 0.15);
    --font-heading: 'Playfair Display', serif;
    --font-body: 'Montserrat', sans-serif;
    --transition-speed: 0.6s;
}

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

body {
    background-color: var(--bg-color);
    font-family: var(--font-body);
    color: var(--text-main);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    overflow-x: hidden;
    padding: 10px;
    padding-top: 100px;
}

.container {
    text-align: center;
    width: 100%;
    max-width: 600px;
    padding: 10px;
}

header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 50;
    padding: 15px 0;
    margin-bottom: 0;
    background-color: var(--bg-color);
}

h1 {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    color: var(--accent);
    margin-bottom: 5px;
    letter-spacing: 1px;
    font-style: italic;
}

.subtitle {
    color: var(--text-light);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.game-board {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    margin-bottom: 20px;
    perspective: 1000px;
}

.card {
    background-color: transparent;
    aspect-ratio: 3/4;
    cursor: pointer;
    position: relative;
    transform-style: preserve-3d;
    transition: transform var(--transition-speed);
}

.card.flipped {
    transform: rotateY(180deg);
}

.card.matched .card-back {
    box-shadow: 0 0 15px rgba(230, 57, 70, 0.3);
    border-color: var(--accent);
}

.card-face {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    border-radius: 8px;
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: var(--shadow-soft);
    font-size: 1.5rem;
    transition: box-shadow 0.3s ease, border-color 0.3s ease;
    overflow: hidden;
}

.card-front {
    background-color: var(--card-back);
    color: white;
    background-image: radial-gradient(#fff 15%, transparent 16%),
        radial-gradient(#fff 15%, transparent 16%);
    background-size: 8px 8px;
    background-position: 0 0, 4px 4px;
}

.card-back {
    background-color: var(--card-front);
    transform: rotateY(180deg);
    color: var(--accent);
    border: 1px solid rgba(0, 0, 0, 0.02);
    padding: 0;
}

.card-back img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.card:hover .card-face {
    box-shadow: var(--shadow-hover);
}

.modal,
.overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(8px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 100;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.5s ease;
}

.modal.visible,
.overlay.visible {
    opacity: 1;
    pointer-events: all;
}

.modal-content,
.overlay-content {
    background: white;
    padding: 30px 20px;
    border-radius: 20px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.15);
    text-align: center;
    width: 90%;
    max-width: 400px;
    transform: translateY(20px);
    transition: transform 0.5s ease;
    border: 1px solid rgba(230, 57, 70, 0.1);
}

.modal.visible .modal-content,
.overlay.visible .overlay-content {
    transform: translateY(0);
}

.modal h2,
.overlay h1 {
    font-family: var(--font-heading);
    color: var(--accent);
    margin-bottom: 10px;
    font-size: 2rem;
}

.big-question {
    font-size: 1.2rem;
    margin: 15px 0 25px;
    font-weight: 500;
    line-height: 1.4;
}

.actions {
    display: flex;
    flex-direction: column;
    flex-direction: row;
    gap: 15px;
    justify-content: center;
    position: relative;
    min-height: 60px;
}

.btn {
    padding: 12px 25px;
    border: none;
    border-radius: 50px;
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    -webkit-tap-highlight-color: transparent;
}

.btn.primary {
    background-color: var(--accent);
    color: white;
    box-shadow: 0 5px 15px rgba(230, 57, 70, 0.3);
}

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

.btn.secondary {
    background-color: #f0f0f0;
    color: var(--text-light);
}

footer {
    margin-top: 30px;
    font-size: 0.7rem;
    color: var(--text-light);
    opacity: 0.6;
}

.card-back.message-card {
    background: white;
    color: var(--accent);
    font-family: var(--font-heading);
    font-size: 0.9rem;
    font-weight: bold;
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 2px;
    border: 2px solid var(--accent);
    box-shadow: 0 0 20px rgba(230, 57, 70, 0.2);
    word-break: break-word;
}

@media (min-width: 600px) {
    .card-back.message-card {
        font-size: 1.5rem;
    }
}

@media (min-width: 600px) {
    .container {
        padding: 40px;
    }

    h1 {
        font-size: 3.5rem;
    }

    .game-board {
        grid-template-columns: repeat(4, 1fr);
        gap: 20px;
    }

    .card-face {
        border-radius: 12px;
        font-size: 2rem;
    }

    .modal-content {
        padding: 50px;
    }

    .modal h2 {
        font-size: 2.8rem;
    }

    .big-question {
        font-size: 1.8rem;
    }
}