* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    min-height: 100vh;
    padding: 0 16px 50px;

    font-family: "Inter", sans-serif;
    color: #f8fafc;

    background:
        radial-gradient(
            circle at 10% 0%,
            rgba(59, 130, 246, 0.16),
            transparent 35%
        ),
        radial-gradient(
            circle at 90% 100%,
            rgba(56, 189, 248, 0.10),
            transparent 35%
        ),
        #0f172a;
}

/* =========================
   CABEÇALHO
========================= */

.titulo {
    width: min(850px, 100%);
    margin: 0 auto;
    padding: 42px 0 24px;
}

.titulo-topo {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 15px;
}

.titulo h1 {
    color: #e0f2fe;

    font-size: 30px;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.titulo p {
    margin-top: 8px;

    color: #94a3b8;

    font-size: 14px;
}

.codigo-retro {
    padding: 6px 9px;

    border: 1px solid rgba(56, 189, 248, 0.15);
    border-radius: 7px;

    background: rgba(56, 189, 248, 0.04);

    color: #38bdf8;

    font-family: "IBM Plex Mono", monospace;
    font-size: 9px;
    letter-spacing: 1px;
}

/* =========================
   CONVERSOR
========================= */

.conversor {
    width: min(850px, 100%);
    margin: 0 auto;

    padding: 24px;

    border: 1px solid rgba(148, 163, 184, 0.14);
    border-radius: 22px;

    background:
        linear-gradient(
            145deg,
            rgba(23, 37, 84, 0.96),
            rgba(15, 23, 42, 0.98)
        );

    box-shadow:
        0 20px 50px rgba(0, 0, 0, 0.25);
}

/* =========================
   MODO
========================= */

.modo {
    display: grid;
    grid-template-columns: 1fr 1fr;

    overflow: hidden;

    border: 1px solid rgba(148, 163, 184, 0.13);
    border-radius: 12px;

    background: rgba(15, 23, 42, 0.55);
}

.modo button {
    min-height: 48px;

    border: 0;
    border-right: 1px solid rgba(148, 163, 184, 0.1);

    background: transparent;

    color: #64748b;

    font-family: "Inter", sans-serif;
    font-size: 12px;
    font-weight: 600;

    cursor: pointer;

    transition: 0.2s ease;
}

.modo button:last-child {
    border-right: 0;
}

.modo button:hover {
    color: #cbd5e1;
    background: rgba(59, 130, 246, 0.05);
}

.modo button.modo-ativo {
    color: #bae6fd;

    background:
        linear-gradient(
            135deg,
            rgba(37, 99, 235, 0.22),
            rgba(56, 189, 248, 0.08)
        );

    box-shadow:
        inset 0 -2px 0 #38bdf8;
}

/* =========================
   CAMPOS
========================= */

.entrada,
.resultado {
    margin-top: 20px;

    overflow: hidden;

    border: 1px solid rgba(148, 163, 184, 0.13);
    border-radius: 14px;

    background: rgba(2, 6, 23, 0.28);

    transition: 0.2s ease;
}

.entrada:focus-within,
.resultado:focus-within {
    border-color: rgba(56, 189, 248, 0.35);

    box-shadow:
        0 0 0 3px rgba(56, 189, 248, 0.035);
}

.campo-topo,
.resultado-topo {
    display: flex;
    align-items: center;
    justify-content: space-between;

    min-height: 45px;
    padding: 0 14px;

    border-bottom: 1px solid rgba(148, 163, 184, 0.09);
}

.campo-topo label,
.resultado-topo label {
    color: #e2e8f0;

    font-size: 12px;
    font-weight: 600;
}

.campo-topo span,
.resultado-topo > div span {
    margin-left: 7px;

    color: #475569;

    font-family: "IBM Plex Mono", monospace;
    font-size: 8px;
    letter-spacing: 1px;
}

.entrada textarea,
.resultado textarea {
    display: block;

    width: 100%;
    min-height: 200px;

    padding: 16px;

    border: 0;
    outline: 0;

    resize: vertical;

    background: transparent;

    color: #dbeafe;

    font-family: "Inter", sans-serif;
    font-size: 13px;
    line-height: 1.7;

    caret-color: #38bdf8;
}

.resultado textarea {
    min-height: 220px;

    font-family: "IBM Plex Mono", monospace;
    font-size: 12px;
}

textarea::placeholder {
    color: #475569;
}

.campo-rodape {
    display: flex;
    justify-content: space-between;

    padding: 9px 14px;

    border-top: 1px solid rgba(148, 163, 184, 0.08);

    color: #475569;

    font-family: "IBM Plex Mono", monospace;
    font-size: 8px;
}

/* =========================
   BOTÕES
========================= */

.acoes {
    display: flex;
    gap: 10px;

    margin-top: 16px;
}

.acoes button {
    min-height: 42px;

    padding: 0 18px;

    border-radius: 10px;

    font-family: "Inter", sans-serif;
    font-size: 12px;
    font-weight: 600;

    cursor: pointer;

    transition: 0.2s ease;
}

.btn-principal {
    border: 1px solid rgba(56, 189, 248, 0.4);

    background:
        linear-gradient(
            135deg,
            #2563eb,
            #1687d9
        );

    color: white;

    box-shadow:
        0 8px 20px rgba(37, 99, 235, 0.16);
}

.btn-principal:hover {
    transform: translateY(-1px);

    box-shadow:
        0 10px 24px rgba(37, 99, 235, 0.24);
}

.btn-secundario {
    border: 1px solid rgba(148, 163, 184, 0.14);

    background: rgba(30, 41, 59, 0.6);

    color: #94a3b8;
}

.btn-secundario:hover {
    border-color: rgba(148, 163, 184, 0.28);

    color: #e2e8f0;
}

#copiar {
    padding: 7px 11px;

    border: 1px solid rgba(56, 189, 248, 0.14);
    border-radius: 8px;

    background: rgba(56, 189, 248, 0.04);

    color: #64748b;

    font-size: 10px;
    font-weight: 600;

    cursor: pointer;

    transition: 0.2s ease;
}

#copiar:hover {
    border-color: rgba(56, 189, 248, 0.35);

    background: rgba(56, 189, 248, 0.08);

    color: #7dd3fc;
}

/* =========================
   MENSAGEM
========================= */

.mensagem {
    min-height: 18px;

    margin-top: 9px;

    color: #fbbf24;

    font-size: 10px;
}

/* =========================
   INFORMAÇÕES
========================= */

.info {
    width: min(850px, 100%);
    margin: 14px auto 0;

    display: grid;
    grid-template-columns: repeat(3, 1fr);

    border: 1px solid rgba(148, 163, 184, 0.1);
    border-radius: 13px;

    background: rgba(15, 23, 42, 0.55);
}

.info-item {
    display: flex;
    flex-direction: column;
    gap: 5px;

    padding: 13px 16px;
}

.info-item + .info-item {
    border-left: 1px solid rgba(148, 163, 184, 0.08);
}

.info-item span {
    color: #475569;

    font-size: 9px;
}

.info-item strong {
    color: #94a3b8;

    font-family: "IBM Plex Mono", monospace;
    font-size: 10px;
    font-weight: 500;
}

.info-item .status {
    color: #38bdf8;
}

/* =========================
   DETALHE RETRÔ
========================= */

.rodape-retro {
    width: min(850px, 100%);
    margin: 11px auto 0;

    color: rgba(56, 189, 248, 0.18);

    font-family: "IBM Plex Mono", monospace;
    font-size: 8px;
    letter-spacing: 2px;

    text-align: right;
}

/* =========================
   RESPONSIVO
========================= */

@media (max-width: 650px) {

    body {
        padding: 0 12px 40px;
    }

    .titulo {
        padding-top: 30px;
    }

    .titulo h1 {
        font-size: 26px;
    }

    .conversor {
        padding: 20px;
    }
}

@media (max-width: 500px) {

    .titulo-topo {
        align-items: flex-start;
    }

    .codigo-retro {
        font-size: 8px;
    }

    .titulo h1 {
        font-size: 23px;
    }

    .titulo p {
        font-size: 12px;
    }

    .conversor {
        padding: 17px;
        border-radius: 18px;
    }

    .modo button {
        min-height: 45px;
        padding: 0 8px;

        font-size: 11px;
    }

    .entrada textarea,
    .resultado textarea {
        min-height: 170px;

        padding: 13px;

        font-size: 12px;
    }

    .resultado textarea {
        min-height: 185px;
    }

    .acoes button {
        flex: 1;
    }

    .info-item {
        padding: 11px;
    }
}

@media (max-width: 360px) {

    .titulo {
        padding-top: 23px;
    }

    .titulo-topo {
        align-items: center;
    }

    .codigo-retro {
        display: none;
    }

    .modo {
        grid-template-columns: 1fr;
    }

    .modo button {
        border-right: 0;
        border-bottom: 1px solid rgba(148, 163, 184, 0.1);
    }

    .modo button:last-child {
        border-bottom: 0;
    }

    .info {
        grid-template-columns: 1fr;
    }

    .info-item + .info-item {
        border-left: 0;
        border-top: 1px solid rgba(148, 163, 184, 0.08);
    }
}