:root {
    --portal-primary: #0f172a;
    --portal-primary-hover: #1e293b;
    --portal-accent: #2563eb;
    --portal-bg: #f8fafc;
    --portal-surface: #ffffff;
    --portal-border: #e2e8f0;
    --portal-muted: #64748b;
    --portal-radius: 14px;
}

body { 
    background-color: var(--portal-bg); 
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
    color: #1e293b;
    -webkit-tap-highlight-color: transparent;
    padding-bottom: 76px; /* Clearance for fixed bottom navigation bar */
}

/* Modern Minimalist Header Bar */
.portal-header { 
    background: var(--portal-primary); 
    color: #ffffff; 
    padding: 1.25rem 1rem 1.15rem; 
    border-bottom: 2px solid rgba(255, 255, 255, 0.08);
}
.portal-brand-icon {
    width: 38px;
    height: 38px;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.1);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: #60a5fa;
    font-size: 1.25rem;
}
.portal-header-title {
    font-size: 1.05rem;
    font-weight: 700;
    letter-spacing: -0.2px;
}
.portal-header-sub {
    font-size: 0.76rem;
    color: rgba(255, 255, 255, 0.6);
}

/* Modern Minimalist Cards */
.nav-card {
    border-radius: var(--portal-radius);
    background: var(--portal-surface);
    border: 1px solid var(--portal-border);
    transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
    text-decoration: none !important;
    color: inherit !important;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    height: 100%;
    overflow: hidden;
}
.nav-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 25px -4px rgba(15, 23, 42, 0.08);
    border-color: #cbd5e1;
}
.nav-card:active {
    transform: scale(0.985);
}

.icon-box {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    flex-shrink: 0;
}

.card-services { border-top: 3px solid #2563eb; }
.card-services .icon-box { background: #eff6ff; color: #2563eb; }

.card-patient { border-top: 3px solid #16a34a; }
.card-patient .icon-box { background: #f0fdf4; color: #16a34a; }

.card-report { border-top: 3px solid #9333ea; }
.card-report .icon-box { background: #faf5ff; color: #9333ea; }

.card-priority { border-top: 3px solid #dc2626; }
.card-priority .icon-box { background: #fef2f2; color: #dc2626; }

.card-footer-action {
    background-color: #f8fafc;
    border-top: 1px solid var(--portal-border);
    padding: 0.65rem 1.15rem;
    font-size: 0.80rem;
    font-weight: 600;
}

/* Fixed Modern Bottom Navigation Bar */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 62px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-top: 1px solid var(--portal-border);
    display: flex;
    justify-content: space-around;
    align-items: center;
    z-index: 1030;
    box-shadow: 0 -2px 12px rgba(15, 23, 42, 0.05);
}

.bottom-nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--portal-muted);
    text-decoration: none;
    font-size: 0.68rem;
    font-weight: 600;
    transition: color 0.15s ease, transform 0.1s ease;
    width: 25%;
    height: 100%;
}

.bottom-nav-item i {
    font-size: 1.22rem;
    line-height: 1;
    margin-bottom: 2px;
}

.bottom-nav-item.active {
    color: var(--portal-accent);
}

.bottom-nav-item:active {
    transform: scale(0.92);
}