/* HEADER */
.page-header {
    background: var(--card-bg);
    border-radius: 18px;
    padding: 30px;
    margin-bottom: 30px;
    border: 1px solid rgba(0,0,0,0.1);
    box-shadow: 0 4px 20px rgba(0,0,0,0.12);
    backdrop-filter: blur(10px);
    position: relative;
}

.page-header::before {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: 18px;
    padding: 2px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-mask:
        linear-gradient(#000 0 0) content-box,
        linear-gradient(#000 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0.35;
    pointer-events: none;
}

.page-title {
    font-size: 28px;
    font-weight: 800;
    margin-bottom: 8px;
    color: var(--primary-dark);
}

.page-subtitle {
    font-size: 16px;
    opacity: 0.7;
    margin: 0;
}