/* ==============================================
   RESPONSIVE ENHANCEMENTS FOR QBPOS HELP
   ============================================== */

/* Base Reset for Better Cross-Browser Compatibility */
* {
    box-sizing: border-box;
}

html {
    -webkit-text-size-adjust: 100%;
    -ms-text-size-adjust: 100%;
}

body {
    margin: 0;
    padding: 0;
    overflow-x: hidden;
}

/* Improve Image Responsiveness */
img {
    max-width: 100%;
    height: auto;
    display: inline-block;
}

/* Enhanced Focus States for Accessibility */
a:focus,
button:focus,
input:focus,
select:focus,
textarea:focus {
    outline: 2px solid #4a90e2;
    outline-offset: 2px;
}

/* Skip to Content Link for Screen Readers */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: #4a90e2;
    color: white;
    padding: 8px;
    text-decoration: none;
    z-index: 100;
}

.skip-link:focus {
    top: 0;
}

/* ==============================================
   MOBILE STYLES (0px - 767px)
   ============================================== */
@media only screen and (max-width: 767px) {
    html {
        font-size: 18px !important;
    }
    
    body {
        font-size: 18px !important;
        padding: 8px !important;
        line-height: 1.6 !important;
        word-wrap: break-word !important;
        overflow-wrap: break-word !important;
    }
    
    /* All content text on mobile - 18px with wrapping */
    p, div, span, td, th, li {
        font-size: 18px !important;
        line-height: 1.6 !important;
        word-wrap: break-word !important;
        overflow-wrap: break-word !important;
    }
    
    /* Links should wrap too */
    a {
        font-size: 18px !important;
        word-wrap: break-word !important;
        overflow-wrap: break-word !important;
    }
    
    /* Tables should fit screen */
    table {
        width: 100% !important;
        max-width: 100% !important;
        table-layout: auto !important;
        word-wrap: break-word !important;
    }
    
    /* Prevent horizontal overflow */
    * {
        max-width: 100%;
        box-sizing: border-box;
    }
    
    img {
        max-width: 100% !important;
        height: auto !important;
    }
    
    h1 { font-size: 26px !important; }
    h2 { font-size: 22px !important; }
    h3 { font-size: 20px !important; }
    h4 { font-size: 18px !important; }
    
    /* Compact tree navigation for mobile */
    .dtree {
        font-size: 16px !important;
        line-height: 1.4 !important;
    }
    
    .dtree a {
        padding: 6px 8px !important;
        margin: 0 !important;
        display: inline-block !important;
        min-height: 36px !important;
        line-height: 1.4 !important;
        color: #333 !important;
    }
    
    .dtree img {
        width: 16px !important;
        height: 16px !important;
        margin-right: 5px !important;
        vertical-align: middle !important;
    }
    
    .dtree p {
        margin: 4px 0 !important;
        padding: 2px 0 !important;
        font-size: 12px !important;
    }
    
    .dtree > p {
        border-bottom: 1px solid #ddd !important;
        padding-bottom: 3px !important;
        margin-bottom: 4px !important;
    }
    
    .dtree > p a {
        display: inline-block !important;
        padding: 6px 10px !important;
        margin: 2px !important;
        background: #f5f5f5 !important;
        border: 1px solid #ddd !important;
        border-radius: 4px !important;
        font-size: 12px !important;
        min-height: 32px !important;
    }
    
    /* Compact tree structure */
    .dtree .dTreeNode,
    .dtree div {
        line-height: 1.3 !important;
        padding: 0 !important;
        margin: 0 !important;
    }
    
    .dtree .clip {
        margin-left: 16px !important;
    }
    
    /* Welcome Box Mobile Optimization */
    header[role="banner"] {
        margin: 0 0 12px 0 !important;
    }
    
    header[role="banner"] > div {
        padding: 10px !important;
        margin: 8px 0 !important;
    }
    
    header[role="banner"] h3 {
        font-size: 16px !important;
        margin-bottom: 8px !important;
    }
    
    header[role="banner"] p {
        font-size: 13px !important;
        line-height: 1.4 !important;
    }
    
    /* Footer compact */
    footer[role="contentinfo"] {
        font-size: 11px !important;
        padding: 10px 8px !important;
        margin-top: 20px !important;
    }
}

/* ==============================================
   SMALL MOBILE PHONES (360px - 480px)
   iPhone SE, Galaxy S, smaller Android
   ============================================== */
@media only screen and (min-width: 360px) and (max-width: 480px) {
    body {
        font-size: 17px !important;
        padding: 6px !important;
    }
    
    p, div, span, td, th, li, a {
        font-size: 17px !important;
    }
    
    .dtree {
        font-size: 15px !important;
    }
    
    .dtree a {
        padding: 8px 6px !important;
        min-height: 40px !important;
    }
}

/* ==============================================
   MEDIUM MOBILE PHONES (481px - 767px)
   iPhone 12/13/14, larger Android phones
   ============================================== */
@media only screen and (min-width: 481px) and (max-width: 767px) {
    body {
        font-size: 18px !important;
        padding: 8px !important;
    }
    
    p, div, span, td, th, li, a {
        font-size: 18px !important;
    }
    
    .dtree {
        font-size: 16px !important;
    }
}

/* ==============================================
   TABLET STYLES (768px - 1024px)
   iPad, Android tablets
   ============================================== */
@media only screen and (min-width: 768px) and (max-width: 1024px) {
    html {
        font-size: 18px;
    }
    
    body {
        font-size: 18px;
        padding: 10px;
        line-height: 1.5;
        word-wrap: break-word;
        overflow-wrap: break-word;
    }
    
    /* All content text on tablet/iPad */
    p, div, span, td, th, li {
        font-size: 18px !important;
        line-height: 1.5 !important;
        word-wrap: break-word !important;
        overflow-wrap: break-word !important;
    }
    
    a {
        font-size: 18px !important;
        word-wrap: break-word !important;
    }
    
    /* Tables fit screen */
    table {
        max-width: 100% !important;
        word-wrap: break-word !important;
    }
    
    h1 { font-size: 26px !important; }
    h2 { font-size: 22px !important; }
    h3 { font-size: 20px !important; }
    h4 { font-size: 18px !important; }
    
    .dtree {
        font-size: 16px !important;
        line-height: 1.4 !important;
    }
    
    .dtree a {
        padding: 4px 6px !important;
        margin: 0 !important;
        line-height: 1.4 !important;
    }
    
    .dtree img {
        width: 16px !important;
        height: 16px !important;
        margin-right: 2px !important;
    }
    
    .dtree p {
        margin: 4px 0 2px 0 !important;
        padding: 2px 0 !important;
    }
    
    /* Tablet-specific touch improvements */
    .dtree a:hover {
        background-color: #e8f4ff;
    }
}

/* ==============================================
   DESKTOP STYLES (1025px and above)
   Desktop navigation: 13px (DO NOT CHANGE)
   NO CONTENT FONT CHANGES - Keep inline 13pt styles
   ============================================== */
@media only screen and (min-width: 1025px) {
    /* Content area margins for desktop readability */
    body {
        margin: 25px 25px 25px 35px;
        padding: 0;
    }
    
    /* Desktop navigation ONLY - LOCKED at 13px */
    .dtree {
        font-size: 13px !important;
        line-height: 1.3 !important;
    }
    
    .dtree * {
        font-size: 13px !important;
    }
    
    .dtree a {
        padding: 2px 4px !important;
        margin: 0 !important;
        line-height: 1.3 !important;
        display: inline-block !important;
    }
    
    .dtree img {
        width: 16px !important;
        height: 16px !important;
        margin-right: 4px !important;
        vertical-align: middle !important;
    }
    
    .dtree p {
        margin: 4px 0 2px 0 !important;
        padding: 2px 0 !important;
        line-height: 1.1 !important;
    }
    
    .dtree > p {
        padding-bottom: 3px !important;
        margin-bottom: 4px !important;
    }
    
    .dtree div {
        line-height: 1.1 !important;
        margin: 0 !important;
        padding: 0 !important;
    }
    
    .dtree .clip {
        margin-left: 16px !important;
    }
    
    .dtree a:hover {
        background-color: #e8f4ff !important;
    }
    
    /* Smooth scrolling for desktop */
    html {
        scroll-behavior: smooth;
    }
}

/* ==============================================
   PRINT STYLES
   ============================================== */
@media print {
    header[role="banner"],
    footer[role="contentinfo"],
    nav[role="navigation"] {
        display: none;
    }
    
    body {
        font-size: 12pt;
        color: #000;
        background: #fff;
    }
    
    a {
        text-decoration: none;
        color: #000;
    }
    
    a[href]:after {
        content: " (" attr(href) ")";
        font-size: 10pt;
        color: #666;
    }
}

/* ==============================================
   DARK MODE SUPPORT (if user prefers dark mode)
   ============================================== */
@media (prefers-color-scheme: dark) {
    body {
        background-color: #1e1e1e;
        color: #e0e0e0;
    }
    
    .dtree a {
        color: #e0e0e0 !important;
    }
    
    .dtree a:hover,
    .dtree a.nodeSel {
        background-color: #2d2d2d !important;
    }
    
    header[role="banner"] > div {
        background-color: #2a3f5f !important;
        border-color: #5a90d2 !important;
        color: #e0e0e0 !important;
    }
    
    header[role="banner"] h3 {
        color: #7ab3ff !important;
    }
    
    footer[role="contentinfo"] {
        border-top-color: #444 !important;
        color: #999 !important;
    }
}

/* ==============================================
   REDUCED MOTION for Accessibility
   ============================================== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* ==============================================
   HIGH CONTRAST MODE Support
   ============================================== */
@media (prefers-contrast: high) {
    body {
        background: #fff;
        color: #000;
    }
    
    a {
        color: #0000ff;
        text-decoration: underline;
    }
    
    a:focus {
        outline: 3px solid #000;
    }
}