h1 {
    color: #3b82f6; /* bleu Esportify */
    text-align: center;
    margin: 2.5rem 0 2rem; /* espace en bas réduit */
    font-weight: 600;
    letter-spacing: 1.5px;
    font-size: 2rem;
}

form {
    max-width: 500px;
    margin: 0 auto 4rem;
    padding: 2.5rem;
    background: #1e293b;
    border-radius: 10px;
}

label {
    color: #60a5fa;
    font-weight: 500;
    margin-bottom: 0.5rem;
    display: block;
    font-size: 1rem;
}

input[type="email"],
input[type="password"] {
    width: 100%;
    padding: 0.7rem 1rem;
    border: 2px solid #3b82f6;
    border-radius: 8px;
    background: #0f172a;
    color: #cbd5e1;
    font-size: 1.05rem;
    margin-bottom: 1.2rem;
    transition: border-color 0.25s ease;
}

input:focus {
    border-color: #60a5fa;
    outline: none;
}

button.btn {
    width: 100%;
    padding: 1rem 0;
    background-color: #3b82f6;
    border: none;
    border-radius: 8px;
    color: white;
    font-weight: 600;
    font-size: 1.2rem;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

button.btn:hover {
    background-color: #2563eb;
}

.alert-danger {
    max-width: 500px;
    margin: 1rem auto;
    background: #7f1d1d;
    color: white;
    padding: 0.9rem 1.2rem;
    border-radius: 8px;
    text-align: center;
    font-weight: 600;
}

.mb-3 {
    text-align: center;
    color: #cbd5e1;
    margin-bottom: 1.2rem;
}

a {
    color: #3b82f6;
    text-decoration: underline;
}