@import url('https://fonts.googleapis.com/css2?family=Bebas+Neue&family=Rajdhani:wght@400;600;700&display=swap');

body { 
    width: 100%; 
    height: 100vh;     
    background: #000;  
    color: #fff; 
    font-family: 'Rajdhani', sans-serif; 
    overflow: hidden;    
    margin: 0;           
    padding: 0;
}

/* https://developer.mozilla.org/fr/docs/Web/HTML/Element/canvas */
#myCanvas { 
    display: block;
}
/* https://developer.mozilla.org/fr/docs/Web/CSS/gradient/linear-gradient */
.home-overlay { 
    position: absolute; 
    inset: 0; 
    background: linear-gradient(to bottom, rgba(0,0,0,0.2) 0%, rgba(0,0,0,0.6) 50%, rgba(0,0,0,0.97) 100%); 
    z-index: 1;
} 

/* https://developer.mozilla.org/fr/docs/Web/CSS/CSS_flexible_box_layout */
.home-content { 
    position: relative; 
    z-index: 5; 
    height: 100vh; 
    display: flex;      
    flex-direction: column; 
    align-items: center; 
    justify-content: center;
} 
/* https://developer.mozilla.org/fr/docs/Web/CSS/clamp */
.logo { 
    font: 500 clamp(52px, 9vw, 100px) 'Bebas Neue', sans-serif; 
    letter-spacing: 5px; 
    margin-bottom: 6px; 
} 

.logo .star { 
    color: #e02020; 
} 
/* https://stackoverflow.com/questions/4151743/how-can-i-change-the-thickness-of-my-hr-tag */
.logo-underline { 
    width: min(480px, 72vw); 
    height: 2px; 
    background: #ffffff; 
    margin-bottom: 40px; 
}
/* https://www.youtube.com/watch?v=RFGiYHPKWgg */
.username-row {
    display: flex;
    align-items: center;
    gap: 10px;
    position: relative;
    z-index: 20; 
    pointer-events: all;
}
/* https://developer.mozilla.org/fr/docs/Web/CSS/pointer-events */
#username-input {
    background: rgba(255,255,255,0.1);
    border: 2px solid rgba(255,255,255,0.5) !important; 
    outline: none !important;
    border-radius: 4px;
    color: #fff;
    font-family: 'Rajdhani', sans-serif;
    font-size: 18px;
    padding: 6px 12px;
    width: 200px;
    pointer-events: all;
    position: relative;
    z-index: 20;
}

#username-input::placeholder { 
    color: rgba(255,255,255,0.4);
}

.gradient {
    padding:1px;
    background: #dfdfdf;
    position: relative;
    border-radius: 100px; 
    width: 100px;
    height:30px;
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 1s ease-in-out;
    
}
.gradient::after {
    content: '';
    position: absolute;
    padding: 5px;
    width: 100%;
    height: 100%;
    border-radius: 100px;
    padding:5px;
    background: linear-gradient(to bottom right, red 0% 35%, black 100%);
    z-index: -1;
}
.gradient:hover {
    color: white;
    z-index: 0;
}

/* https://developer.mozilla.org/fr/docs/Web/CSS/text-decoration */
a {
    text-decoration: none;
    color: black;
}

.levelSel {
    padding:1px;
    background: #dfdfdf;
    position: relative;
    border-radius: 150px; 
    width: 250px;
    height:70px;
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 1s ease-in-out;
    
}
.levelSel::after {
    content: '';
    position: absolute;
    padding: 5px;
    width: 100%;
    height: 100%;
    border-radius: 100px;
    padding:5px;
    background: linear-gradient(to bottom right, red 0% 35%, black 100%);
    z-index: -1;
}
.levelSel:hover {
    color: white;
    z-index: 0;
}
/* https://developer.mozilla.org/fr/docs/Web/CSS/text-decoration */
a {
    text-decoration: none;
    color: black;
}

.levelSel a {
    font-family: 'Bebas Neue', sans-serif;
    font-size: 20px;
    letter-spacing: 3px;
    color: #000;
}

.levelSel a {
    font-family: 'Bebas Neue', sans-serif;
    font-size: 20px;
    letter-spacing: 3px;
    color: #000;
}
/* https://developer.mozilla.org/fr/docs/Web/CSS/position */
.screen { 
    position: fixed; 
    inset: 0; 
    display: flex; 
    justify-content: center; 
    align-items: center; 
    z-index: 10;
} 
/* https://developer.mozilla.org/fr/docs/Web/CSS/pointer-events */
.grid { 
    position: absolute;
    pointer-events: none;
    inset: 0; 
    background-image: 
        linear-gradient(rgba(255,255,255,0.08) 1px, transparent 1px), 
        linear-gradient(90deg, rgba(255,255,255,0.08) 1px, transparent 1px); 
    background-size: 60px 60px; 
    z-index: 11;
} 
video {
    width: min(700px, 90vw);
    z-index: 1;
}

#usernameDisplay {
    position: fixed;
    top: 16px;
    left: 24px;
    z-index: 10;
    margin: 0;
    color: #fff;
    font-family: 'Rajdhani', sans-serif;
    font-size: 22px;
}

#ui-panel {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    z-index: 10;
    text-align: center;
    padding: 12px 0 20px;
    background: linear-gradient(to top, rgba(0,0,0,0.9) 0%, rgba(0,0,0,0) 100%);
    pointer-events: none; 
}
#ui-panel * {
    pointer-events: auto;
}

#ui-panel h1 {
    margin: 0 0 10px;
    font-size: 22px;
    color: #fff;
    font-family: 'Rajdhani', sans-serif;
    letter-spacing: 2px;
}

.equation-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 26px;
    color: #fff;
    font-family: 'Rajdhani', sans-serif;
}
.abc {
    background-color: #1a1a1a;
    color: #fff;
    border: 2px solid #e02020 !important; 
    outline: none !important;
    border-radius: 4px;
    height: 38px;
    width: 120px;
    font-size: 22px;
    text-align: center;
    padding: 0 8px;
}

textarea {
    border: none;
    outline: none;
}

.tir {
    background-color: #000;
    color: #fff;
    border: 2px solid #fff;
    border-radius: 4px;
    height: 38px;
    width: 110px;
    font-size: 22px;
    cursor: pointer;
    font-family: 'Bebas Neue', sans-serif;
    letter-spacing: 2px;
    
}
#tirs-restants {
    position: fixed;
    top: 75px;
    left: 24px;
    z-index: 999999;
    margin: 0;
    color: #fff;
    font-family: 'Rajdhani', sans-serif;
    font-size: 22px;

}
#level {
    position: fixed;
    top: 50px;
    left: 24px;
    z-index: 999999;
    margin: 0;
    color: #fff;
    font-family: 'Rajdhani', sans-serif;
    font-size: 22px;
}
#divAffiche {
    margin-top: 8px;
    font-size: 24px;
    font-family: 'Bebas Neue', sans-serif;
    letter-spacing: 3px;
    color: #fff;
    min-height: 30px;
}
.screenShake {
    animation: shake 0.2s;
    animation-iteration-count: 1;
}

@keyframes shake {

    0% {
        transform: translate(1px, 1px) rotate(0deg);
    }

    10% {
        transform: translate(-1px, -2px) rotate(-1deg);
    }

    20% {
        transform: translate(-3px, 0px) rotate(1deg);
    }

    30% {
        transform: translate(3px, 2px) rotate(0deg);
    }

    40% {
        transform: translate(1px, -1px) rotate(1deg);
    }

    50% {
        transform: translate(-1px, 2px) rotate(-1deg);
    }

    60% {
        transform: translate(-3px, 1px) rotate(0deg);
    }

    70% {
        transform: translate(3px, 1px) rotate(-1deg);
    }

    80% {
        transform: translate(-1px, -1px) rotate(1deg);
    }

    90% {
        transform: translate(1px, 2px) rotate(0deg);
    }

    100% {
        transform: translate(1px, -2px) rotate(-1deg);
    }
}
/* https://developer.mozilla.org/fr/docs/Web/CSS/position */
#instructions-btn {
position: fixed;
top: 20px;
right: 24px;
z-index: 100;
font-family: 'Bebas Neue', sans-serif;
font-size: 15px;
letter-spacing: 3px;
color: rgba(255,255,255,0.8);
background: rgba(255,255,255,0.07);
border: 1px solid rgba(255,255,255,0.25);
padding: 9px 22px;
text-decoration: none;
}
.rtrn {
    text-align: center;
margin-top: 56px;
padding-top: 28px;
    background: #dfdfdf;
    position: relative;
    border-radius: 100px; 
    width: 100px;
    height:30px;
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 1s ease-in-out;
    
}
.rtrn::after {
    content: '';
    position: absolute;
    padding: 5px;
    width: 100%;
    height: 100%;
    border-radius: 100px;
    padding:5px;
    background: linear-gradient(to bottom right, red 0% 35%, black 100%);
    z-index: -1;
}
.rtrn:hover {
    color: white;
    z-index: 0;
}