@import url('https://fonts.googleapis.com/css2?family=Inter&display=swap');

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

body {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: #1a242a;
}

.container {
    position: relative;
    width: 0px;
    height: 0px;
    background: #37444b;
    border-radius: 25px;
    transition: 0.5s;
    display: flex;
    justify-content: center;
    align-items: center;
}

.container.active {
    width: 400px;
    height: 400px;
    transition-delay: 0.5s;
}

.container::before {
    content: '';
    position: absolute;
    bottom: -15px;
    width: 40px;
    height: 40px;
    background: #37444b;
    border-radius: 5px;
    opacity: 0;
    transition: 0.5s;
    transform: rotate(45deg);
}

.container.active::before {
    opacity: 1;
    transition-delay: 0.5s;
}

.container .content {
    min-width: 400px;
    padding: 40px;
    color: #fff;
    opacity: 0;
    transition: 0.5s;
    transform: scale(0);
}

.container.active .content {
    opacity: 1;
    transition-delay: 0.5s;
    transform: scale(1);
}

.toggleBtn {
    position: absolute;
    bottom: -20px;
    width: 60px;
    height: 60px;
    background: #0bcf9c;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: 0.5s;
}

.toggleBtn::before {
    content: '+';
    font-size: 2.5em;
    color: #fff;
}

.container.active .toggleBtn {
    bottom: -90px;
    transform: rotate(135deg);
    background: #ff5a57;
}