:root {
    --primary-gradient: linear-gradient(90deg, #7b4397 0%, #248cdc 100%);
    --bg-gradient: linear-gradient(315deg, #0c2911 0%, #2b6331 74%, #243e29 100%); 
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --accent-color: #bb86fc;
    --text-main: #fff;
    --text-muted: #b3b3b3;
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    outline: none;
    font-family: 'Inter', sans-serif;
}

body {
    background: var(--bg-gradient);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 20px;
    color: var(--text-main);
}

.logo {
    width: 100px;
    margin-bottom: 25px;
    filter: drop-shadow(0px 4px 15px rgba(255, 255, 0, 0.5));
    mix-blend-mode: multiply;
}

main {
    width: 100%;
    max-width: 420px;
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.40);
    border-radius: 24px;
    padding: 35px 28px;
}

.input-group {
    margin-bottom: 22px;
}

label {
    display: block;
    font-weight: 300;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

label b {
    color: var(--text-main);
    font-weight: 600;
}

select, input {
    background: rgba(0, 0, 0, 0.4);
    border: 1.5px solid var(--glass-border);
    border-radius: 12px;
    height: 52px;
    width: 100%;
    font-size: 1rem;
    color: var(--text-main);
    padding: 0 16px;
    cursor: pointer;
    transition: var(--transition);
}

select:focus, input:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 3px rgba(187, 134, 252, 0.2);
    background: rgba(0, 0, 0, 0.6);
}

.botao-converter {
    width: 100%;
    height: 56px;
    background: var(--primary-gradient);
    border: none;
    border-radius: 14px;
    font-size: 1.1rem;
    font-weight: 700;
    color: #fff;
    cursor: pointer;
    transition: var(--transition);
    font-family: 'Orbitron', sans-serif;
    letter-spacing: 1.5px;
    margin-top: 10px;
    position: relative;
    overflow: hidden;
}

.botao-converter:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    filter: grayscale(0.5);
}

.botao-converter.loading {
    color: transparent;
}

.botao-converter.laoding::after {
    content: '';
    position: absolute;
    width: 24px;
    height: 24px;
    top: 50%;
    left: 50%;
    margin: -12px 0 0 -12px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.result-container {
    border-top: 1px solid var(--glass-border);
    margin-top: 35px;
    padding-top: 25px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
}

.img-cambio {
    width: 32px;
    filter: brightness(0) invert(1);
    opacity: 0.5;
    margin: 10px 0;
}

.moeda-box {
    text-align: center;
    animation:fadeIn 0.5s ease forward;
}

.valor-moeda-de, .valor-moeda-para {
    font-family: 'Orbitron', sans-serif;
    font-size: 1.5rem;
    color: var(--text-main);
    margin-top: 5px;
    background: linear-gradient(to bottom, #fff, #ccc);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.valor-entrada::-webkit-outer-spin-button,
.valor-entrada::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 420px) {
    main { 
        padding: 25px 20px;
    }
    .valor-moeda-de, .valor-moeda-para {
        font-size: 1.25rem;
    }
}