/* ============================================
   BASE STYLES
   ============================================ */

body {
    position: relative;
    margin: 0;
    padding: 0;
    overflow: hidden;
}

body::before,
body::after {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    transition: opacity 1s ease;
}

body::before {
    background: linear-gradient(140deg, #c9cdd8, #f1f1f1);
    opacity: 1;
    z-index: -2;
}

body::after {
    background: linear-gradient(140deg, #2d2d33, #0b0b1a);
    opacity: 0;
    z-index: -1;
}

body.dark-mode::before {
    opacity: 0;
}

body.dark-mode::after {
    opacity: 1;
}

/* ============================================
   CONTAINER
   ============================================ */

.container {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}


/* ============================================
   BUTTON
   ============================================ */

.button {
    position: relative;
    width: 480px;
    height: 200px;
    border-radius: 100px;
    overflow: hidden;
    cursor: pointer;
    box-shadow: 2px 4px 10px rgba(0, 0, 0, 0.6);

}

.button::before,
.button::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border-radius: 100px;
    transition: opacity 1s ease;
    z-index: 1;
}

.button::before {
    background: linear-gradient(90deg, #5bc3ff, #255977);
    opacity: 1;
}

.button::after {
    background: linear-gradient(140deg, #161625, #121220);
    opacity: 0;
}

body.dark-mode .button::before {
    opacity: 0;
}

body.dark-mode .button::after {
    opacity: 1;
    box-shadow:
        inset 0px 15px 10px #10101b80,
        0 8px 20px rgba(0, 0, 0, 0.6),
        0 2px 5px rgba(0, 0, 0, 0.4);
}

/* ============================================
   SUN / MOON
   ============================================ */

.sun-moon {
    position: absolute;
    left: 0;
    z-index: 10;
    width: 160px;
    height: 160px;
    margin: 20px;
    background-color: rgb(255, 183, 29);
    border-radius: 100%;
    box-shadow:
        inset 0px 10px 4px rgb(199, 142, 20),
        inset 0px -8px 4px rgb(255, 206, 99),
        0 0 30px rgba(255, 183, 29, 0.5);
    transform: rotate(180deg);
    transition: left 1s, right 1s, transform 1s;
}

body.dark-mode .sun-moon {
    right: 0px;
    left: calc(100% - 200px);
    background-color: rgb(206, 206, 206);
    box-shadow:
        inset 0px 10px 8px rgb(255, 255, 255),
        inset 0px -8px 8px #6e6e6e,
        0 0 40px rgba(220, 220, 220, 0.3);
    transform: rotate(0deg);
}


/* ============================================
   CRATERS
   ============================================ */

body.dark-mode .crater1 {
    position: absolute;
    margin-top: 60px;
    margin-left: 22px;
    width: 60px;
    height: 60px;
    background-color: #8f8f8f;
    border-radius: 100%;
    box-shadow: inset 2px 2px 4px rgba(0, 0, 0, 0.3);
    opacity: 1;
}

body.dark-mode .crater2 {
    position: absolute;
    margin-top: 25px;
    margin-left: 85px;
    width: 30px;
    height: 30px;
    background-color: #8f8f8f;
    border-radius: 100%;
    box-shadow: inset 6px 6px 4px rgba(0, 0, 0, 0.3);
    opacity: 1;
}

body.dark-mode .crater3 {
    position: absolute;
    margin-top: 100px;
    margin-left: 95px;
    width: 20px;
    height: 20px;
    background-color: #8f8f8f;
    border-radius: 100%;
    box-shadow: inset 2px 2px 4px rgba(0, 0, 0, 0.3);
    opacity: 1;
}


/* ============================================
   CLOUDS
   ============================================ */

.cloud {
    position: absolute;
    bottom: 0;
    background-color: rgb(245, 245, 245);
    border-radius: 50%;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    transition: bottom 1s, opacity 1s;
}

body.dark-mode .cloud {
    opacity: 0;
    bottom: -200px;
}

.c1 {
    z-index: 9;
    width: 250px;
    height: 250px;
    margin-bottom: -150px;
}

.c2 {
    z-index: 8;
    width: 200px;
    height: 200px;
    margin-bottom: -100px;
    margin-left: 180px;
}

.c3 {
    z-index: 7;
    width: 250px;
    height: 250px;
    margin-bottom: -100px;
    margin-left: 325px;
}


/* ============================================
   STARS
   ============================================ */

.star {
    position: absolute;
    width: 100px;
    height: 100px;
    background: rgba(228, 228, 228, 0.925);
    clip-path: polygon(50% 0%, 65% 25%, 100% 50%, 65% 75%,
            50% 100%, 35% 75%, 0% 50%, 35% 25%);
    opacity: 0;
    transform: scale(0.5);
    z-index: 5;
    transition: opacity 1s ease, transform 5s ease;
}

body.dark-mode .star {
    opacity: 1;
    transform: scale(1);
}


.s1 {
    top: 50px;
    left: 250px;
    width: 20px;
    height: 20px;
}

.s2 {
    top: 110px;
    left: 235px;
    width: 8px;
    height: 8px;
}

.s3 {
    top: 140px;
    left: 200px;
    width: 10px;
    height: 10px;
}

.s4 {
    top: 40px;
    left: 190px;
    width: 8px;
    height: 8px;
}

.s5 {
    top: 90px;
    left: 180px;
    width: 5px;
    height: 5px;
}

.s6 {
    top: 24px;
    left: 100px;
    width: 18px;
    height: 18px;
}

.s7 {
    top: 90px;
    left: 110px;
    width: 8px;
    height: 8px;
}

.s8 {
    top: 165px;
    left: 120px;
    width: 5px;
    height: 5px;
}

.s9 {
    top: 50px;
    left: 55px;
    width: 7px;
    height: 7px;
}

.s10 {
    top: 140px;
    left: 80px;
    width: 5px;
    height: 5px;
}

.s11 {
    top: 152px;
    left: 65px;
    width: 5px;
    height: 5px;
}