/* main card */
.base-hero {
    flex: 1;
    min-height: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    padding-top: 48px;
    overflow: hidden;
}
.base-container {
    max-width: 400px;
    width: 100%;
    padding: 0 1.5rem;
}
.base-card {
    background: var(--glass-bg);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    padding: 2.5rem;
    text-align: center;
}
.base-card h1 {
    font-size: 24px;
    font-weight: 600;
    color: var(--fg);
    margin-bottom: 0.5rem;
}
.base-card .sub {
    font-size: 13px;
    color: var(--fg-dim);
    margin-bottom: 2rem;
}

/* button */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    background: linear-gradient(to right, 
        var(--primary) 0%, 
        var(--primary-fade) 100%);
    
    color: var(--primary-fg);
    font-size: 14px;
    font-weight: 600;
    padding: 0 2rem;
    height: 48px;
    width: 100%;
    border-radius: 0.5rem;
    border: none;
    cursor: pointer;
    margin-top: 0.5rem;
    box-shadow: 0px 0px 15px -4px var(--primary);
    transition: 
        transform 0.2s cubic-bezier(0.4, 0, 0.2, 1),
        box-shadow 0.2s cubic-bezier(0.4, 0, 0.2, 1),
        filter 0.2s ease;
}
.btn:hover {
    filter: brightness(0.93);
}
.btn:disabled {
    filter: grayscale(70%);
}