@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;600&display=swap');

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

body {
    background: #0f172a;
    color: white;
}

/* HEADER */
.page-title {
    text-align: center;
    margin: 40px 0;
    font-size: 2rem;
    font-weight: 600;
}

/* MAIN */
main {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 30px;
    padding-bottom: 40px;
}

/* CONTAINERS */
.container {
    min-width: 320px;
    padding: 30px;
    border-radius: 20px;
    backdrop-filter: blur(10px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}

/* TEMPERATURE (degradê) */
.temperature {
    background: linear-gradient(135deg, #3b82f6, #7c3aed, #ef4444);
}

/* DISTANCE (clean tech) */
.distance {
    background: linear-gradient(135deg, #1e293b, #334155);
    border: 1px solid rgba(255,255,255,0.1);
}

/* TITLES */
.container-title {
    text-align: center;
    margin-bottom: 20px;
    font-weight: 500;
}

/* LAYOUT INTERNO */
.converting {
    display: flex;
    justify-content: space-between;
    gap: 20px;
}

.left-side, .right-side {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 18px;
    width: 100%;
}

/* INPUT */
.convert-input {
    background: transparent;
    border: none;
    border-bottom: 2px solid rgba(255,255,255,0.3);
    color: white;
    font-size: 1rem;
    text-align: center;
    padding: 6px;
    width: 100%;
    transition: 0.3s;
}

.convert-input:focus {
    outline: none;
    border-bottom: 2px solid white;
}

/* OUTPUT */
.output {
    opacity: 0.7;
}

/* SELECT */
.dropdown {
    width: 100%;
    padding: 6px;
    border-radius: 10px;
    border: none;
    background: rgba(255,255,255,0.1);
    color: white;
    backdrop-filter: blur(5px);
    cursor: pointer;
}

.dropdown:focus {
    outline: none;
}

option {
    background: #1e293b;
}

/* SWITCH AREA */
.switch {
    display: flex;
    align-items: center;
    gap: 10px;
}

.unit-measure {
    font-size: 0.8rem;
    opacity: 0.8;
}

/* SWITCH */
.measure-switch {
    display: none;
}

.measure-switch-label {
    width: 50px;
    height: 22px;
    background: rgba(255,255,255,0.2);
    border-radius: 20px;
    position: relative;
    cursor: pointer;
    transition: 0.3s;
}

.measure-switch-label::before {
    content: "";
    position: absolute;
    width: 18px;
    height: 18px;
    background: white;
    border-radius: 50%;
    top: 2px;
    left: 3px;
    transition: 0.3s;
}

/* SWITCH ATIVO */
.measure-switch:checked + .measure-switch-label {
    background: #22c55e;
}

.measure-switch:checked + .measure-switch-label::before {
    transform: translateX(26px);
}

/* RESPONSIVO */
@media (max-width: 700px) {
    .converting {
        flex-direction: column;
    }

    .container {
        width: 90%;
    }
}

footer {
    position: fixed;
    bottom: 40px;
    width: 100vw;
}

.contact {
    display: flex;
    justify-content: center;
    font-size: 3rem;
    gap: 30px;
}

.fa-brands {
    transition: 0.2s ease-in-out;
}

.fa-brands:hover {
    transform: translateY(-12px) scale(110%);
}

a {
    color: aliceblue;
}