:root {
    --pink: #e75480;
    --pink-dark: #c8436e;
    --bg: #fff3f8;
    --radius: 15px;
}

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

body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--bg);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

/* ===== Contenedor principal ===== */
.container {
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
}

/* ===== Tarjeta ===== */
.card {
    background: white;
    width: 90%;
    max-width: 400px;
    border-radius: var(--radius);
    box-shadow: 0 4px 25px rgba(0,0,0,0.1);
    padding: 2rem 1.5rem;
    text-align: center;
}

/* ===== Logo circular ===== */
.logo {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--pink);
    box-shadow: 0 0 15px rgba(231, 84, 128, 0.2);
    margin: 0 auto 1rem auto;
    display: block;
}

/* ===== Título ===== */
h3 {
    color: var(--pink);
    margin-bottom: 1.5rem;
    font-weight: 700;
}

/* ===== Inputs ===== */
.input-group {
    margin-bottom: 1rem;
    text-align: left;
}

.input-group label {
    font-weight: 600;
    color: #444;
    display: block;
    margin-bottom: 0.3rem;
}

.input-group input {
    width: 100%;
    padding: 0.6rem;
    border-radius: 10px;
    border: 1px solid #f0c4d0;
    outline: none;
    transition: 0.2s;
}

.input-group input:focus {
    border-color: var(--pink);
    box-shadow: 0 0 4px rgba(231,84,128,0.3);
}

/* ===== Botón ===== */
.btn {
    background-color: var(--pink);
    color: white;
    border: none;
    width: 100%;
    padding: 0.7rem;
    border-radius: 10px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.3s;
}

.btn:hover {
    background-color: var(--pink-dark);
}

/* ===== Enlace inferior ===== */
.volver {
    margin-top: 1rem;
}

.volver a {
    color: var(--pink);
    text-decoration: none;
    font-weight: 600;
}

.volver a:hover {
    text-decoration: underline;
}

/* ===== Responsividad ===== */
@media (max-width: 600px) {
    .card {
        padding: 1.5rem;
    }

    .logo {
        width: 90px;
        height: 90px;
    }
}