@import url('https://fonts.googleapis.com/css2?family=Fredoka:wght@400;500;600;700&family=Nunito:wght@400;600;700&display=swap');

*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg: hsl(40, 33%, 96%);
    --fg: hsl(220, 20%, 18%);
    --card-bg: hsl(0, 0%, 100%);
    --card-back: hsl(210, 56%, 41%);
    --card-matched: hsl(145, 60%, 45%);
    --primary: hsl(210, 56%, 45%);
    --muted: hsl(220, 15%, 90%);
    --muted-fg: hsl(220, 10%, 41%);
    --border: hsl(220, 15%, 87%);
    --radius: 1rem;
}

body {
    font-family: 'Nunito', sans-serif;
    background: var(--bg);
    color: var(--fg);
    min-height: 100dvh;
    overflow-x: hidden;
}

h1,
h2,
h3 {
    font-family: 'Fredoka', sans-serif;
}

.hidden {
    display: none !important;
}

/* Ecrans */
.screen {
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    padding: 1.5rem;
}

/* Menu */
h1 {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: 0.25rem;
}

.subtitle {
    font-size: 1.1rem;
    color: var(--muted-fg);
}

.menu-buttons {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    width: 100%;
    max-width: 18rem;
}

.btn {
    width: 100%;
    padding: 1rem;
    border: none;
    border-radius: var(--radius);
    font-family: 'Fredoka', sans-serif;
    font-weight: 600;
    font-size: 1.1rem;
    color: white;
    cursor: pointer;
    transition: transform 0.15s;
}

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

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

.btn-easy {
    background: hsl(145, 62%, 27%);
}

.btn-medium {
    background: hsl(210, 56%, 45%);
}

.btn-hard {
    background: hsl(340, 65%, 48%);
}

.btn-primary {
    background: var(--primary);
}

.btn-muted {
    background: var(--muted);
    color: var(--muted-fg);
}

.copyright {
  font-size: 0.95rem;
  color: var(--muted-fg);
  opacity: 0.92;
  margin-top: 1rem;
}

.btn-sub {
    display: block;
    font-family: 'Nunito', sans-serif;
    font-size: 0.85rem;
    font-weight: 400;
    opacity: 1;
}

/* Header du jeu */
#game {
    justify-content: flex-start;
    padding: 0.75rem;
}

.game-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    margin-bottom: 0.75rem;
}

.link-btn {
    background: none;
    border: none;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--muted-fg);
    cursor: pointer;
    font-family: 'Nunito', sans-serif;
    transition: color 0.15s;
}

.link-btn:hover {
    color: var(--fg);
}

.difficulty-label {
    font-family: 'Fredoka', sans-serif;
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--primary);
}

.moves-label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--muted-fg);
}

/* Grille */
.grid {
    display: grid;
    gap: 0.5rem;
    width: 100%;
    max-width: 28rem;
    margin: 0 auto;
    flex: 1;
    align-content: center;
}

/* Cartes */
.card-flip {
    perspective: 600px;
    aspect-ratio: 1;
}

.card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    transition: transform 0.3s ease;
    transform-style: preserve-3d;
}

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

.card-face {
    position: absolute;
    inset: 0;
    backface-visibility: hidden;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
}

.card-back {
    background: var(--card-back);
    cursor: pointer;
    box-shadow: 0 2px 8px hsla(210, 60%, 52%, 0.3);
    transition: filter 0.15s, transform 0.15s;
}

.card-back:hover {
    filter: brightness(1.1);
}

.card-back-label {
    font-size: 1.5rem;
    font-weight: 700;
    color: white;
    user-select: none;
}

.card-front {
    transform: rotateY(180deg);
    background: var(--card-bg);
    border: 2px solid var(--border);
}

.card-emoji {
    font-size: 2rem;
    user-select: none;
}

/* Etats */
.card-matched .card-front {
    border-color: var(--card-matched);
    background: hsla(145, 60%, 45%, 0.1);
}

.card-wrong .card-inner {
    animation: shake 0.3s ease;
}

/* Victoire */
.win-emoji {
    font-size: 3.75rem;
    display: block;
    margin-bottom: 1rem;
}

.bold {
    font-weight: 700;
    color: var(--fg);
}

/* Animations */
.bounce-in {
    animation: bounceIn 0.3s ease-out;
    text-align: center;
}

@keyframes bounceIn {
    0% {
        transform: scale(0.8);
        opacity: 0;
    }

    60% {
        transform: scale(1.05);
    }

    100% {
        transform: scale(1);
        opacity: 1;
    }
}

@keyframes shake {

    0%,
    100% {
        transform: rotateY(180deg) translateX(0);
    }

    25% {
        transform: rotateY(180deg) translateX(-4px);
    }

    75% {
        transform: rotateY(180deg) translateX(4px);
    }
}

@media (min-width: 640px) {
    .grid {
        gap: 0.75rem;
    }

    .card-emoji {
        font-size: 2.5rem;
    }
}