:root {
    --sp-primary:       #AC92EC;
    --sp-primary-hover: #9b7fe0;
    --sp-body-bg:       #f4f6f9;
    --sp-card-border:   #e0e0e0;
}

body {
    min-height: 100vh;
    background: var(--sp-body-bg);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
}

.login-card {
    width: 100%;
    max-width: 540px;
    background: #fff;
    border: 1px solid var(--sp-card-border);
    border-radius: .75rem;
    box-shadow: 0 4px 24px rgba(0,0,0,.18);
    overflow: hidden;
}

.login-card-header {
    padding: 2rem 2.5rem 1.5rem;
    text-align: center;
}

.login-card-header img {
    height: 56px;
    margin-bottom: .75rem;
}

.login-card-header .subtitle {
    display: flex;
    align-items: center;
    gap: .6rem;
    font-size: .85rem;
    color: #aaa;
    font-weight: 400;
    margin: 0;
}

.login-card-header .subtitle::before,
.login-card-header .subtitle::after {
    content: '';
    flex: 1;
    height: 1px;
    background: #e8e8e8;
}

.login-card-body {
    padding: 2rem 2.5rem;
}

.input-group-text {
    background: #f8f9fa;
    border-right: none;
    color: #6c757d;
}

.form-control {
    border-left: none;
}

.form-control::placeholder {
    color: #c0c0c0;
}

.form-control:focus {
    border-color: var(--sp-primary);
    box-shadow: 0 0 0 .2rem rgba(172,146,236,.2);
}

.form-control:focus + .input-group-text,
.input-group:focus-within .input-group-text {
    border-color: var(--sp-primary);
}

.btn-login {
    background: var(--sp-primary);
    border: none;
    color: #fff;
    font-weight: 600;
    padding: .75rem;
    font-size: 1rem;
    transition: background .2s;
}

.btn-login:hover {
    background: var(--sp-primary-hover);
    color: #fff;
}