* {
   box-sizing: border-box;
}

body {
    font-family: system-ui, -apple-system, sans-serif;
    background: linear-gradient(135deg, #0f172a, #020617);
    color: #fff;
    margin: 0;
    padding: 20px;
}

/* TITULOS */
h1 {
    text-align: center;
    font-size: 36px;
    margin-bottom: 5px;
}

.descripcionWeb {
    font-size: 15px;
    text-align: center;
    color: #94a3b8;
    margin-bottom: 20px;
}

/* CONTENEDOR */
.container {
    max-width: 700px;
    margin: auto;
}

/* TARJETAS */
.card {
    background: rgba(30, 41, 59, 0.7);
    backdrop-filter: blur(10px);
    padding: 18px;
    margin-bottom: 15px;
    border-radius: 16px;
    border: 1px solid rgba(255,255,255,0.05);
    transition: transform 0.2s ease;
}

.card:hover {
    transform: scale(1.01);
}

/* INPUTS */
select, input {
    padding: 8px;
    margin: 6px 4px;
    border-radius: 8px;
    border: none;
    background: #0f172a;
    color: #fff;
    outline: none;
    border: 1px solid transparent;
    transition: border 0.2s;
}

select:focus, input:focus {
    border: 1px solid #38bdf8;
}

/* BOTONES */
button {
    width: 100%;
    padding: 12px;
    margin-top: 8px;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    background: linear-gradient(135deg, #38bdf8, #0ea5e9);
    color: #000;
    font-weight: bold;
    transition: all 0.2s ease;
}

button:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 10px rgba(56, 189, 248, 0.3);
}

/* BOTONES SECUNDARIOS */
#toggleConfigBtn {
    background: #1e293b;
    color: #fff;
}

.deleteBtn {
    width: 100px;
}

/* TOTAL */
.total {
    margin-top: 20px;
    padding: 20px;
    border-radius: 16px;
    text-align: center;
    font-weight: bold;
    background: linear-gradient(135deg, #22c55e, #16a34a);
    color: #022c22;
    font-size: 20px;
    line-height: 1.6;
}

/* Animación del total */
.total {
    transition: all 0.3s ease;
}

.total.animate {
    transform: scale(1.05);
    box-shadow: 0 0 20px rgba(34, 197, 94, 0.6);
}

/* Animación de aparición */
.fade-in {
    animation: fadeIn 0.4s ease;
}

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

/* GASTOS */
.expense-item {
    display: flex;
    justify-content: space-between;
    background: #020617;
    padding: 8px;
    border-radius: 8px;
    margin-top: 6px;
    transition: transform 0.25s ease, opacity 0.25s ease;
}

.expense-item.removing {
    opacity: 0;
    transform: translateX(40px);
}

/* CONFIG */
.config-panel {
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transform: translateY(-8px);
    transition: all 0.35s ease;
    margin-bottom: 0;
}

.config-panel.active {
    max-height: 300px;
    opacity: 1;
    transform: translateY(0);
}

/* FOOTER */
footer {
    text-align: center;
    margin-top: 40px;
    font-size: 13px;
    color: #94a3b8;
}

a {
    color: #38bdf8;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

/* INPUT PEQUEÑO */
.inputRuta {
    width: 60px;
}

/* RESPONSIVE */
@media (max-width: 500px) {
    h1 {
        font-size: 28px;
    }

    .total {
        font-size: 18px;
    }
}