/**
 * Dot Business Integrated Solutions - Styles
 * 
 * Design Philosophy:
 * - Base layer: 90s aesthetic (gray background, beveled borders, underlined links)
 * - Overlay layer: Modern, clean card with rounded corners and shadows
 * 
 * Color Palette:
 * - Background: #c0c0c0 (classic Windows gray)
 * - Bevel Light: #ffffff
 * - Bevel Dark: #808080
 * - Primary Purple: #6B4C9A (slightly different from IBM reference - more muted)
 * - Gradient End: #3D2A5C (deeper purple)
 * - Link Blue: #0000EE (classic 90s link blue)
 * - Visited Link: #551A8B
 */

/* ==========================================================================
   CSS Custom Properties (Variables)
   ========================================================================== */

:root {
    /* 90s Color Palette */
    --bg-gray: #c0c0c0;
    --bg-gray-dark: #a0a0a0;
    --bevel-light: #ffffff;
    --bevel-dark: #808080;
    --bevel-darker: #404040;
    
    /* Brand Colors */
    --purple-primary: #6B4C9A;
    --purple-deep: #3D2A5C;
    --purple-light: #9B7BC7;
    
    /* Link Colors (90s classic) */
    --link-blue: #0000EE;
    --link-visited: #551A8B;
    --link-active: #EE0000;
    
    /* Modern Overlay Colors */
    --overlay-bg: #ffffff;
    --overlay-shadow: rgba(0, 0, 0, 0.25);
    --overlay-text: #1a1a1a;
    --overlay-text-muted: #666666;
    
    /* Typography */
    --font-serif: "Times New Roman", Times, serif;
    --font-sans: "Times New Roman", Times, serif;
    --font-mono: "Times New Roman", Times, serif;
    --font-modern: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
    
    /* Spacing */
    --container-max-width: 800px;
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-medium: 250ms ease;
}

/* ==========================================================================
   Reset and Base Styles
   ========================================================================== */

*, *::before, *::after {
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

body {
    margin: 0;
    padding: var(--spacing-md);
    min-height: 100vh;
    background-color: var(--bg-gray);
    font-family: var(--font-sans);
    font-size: 1rem;
    line-height: 1.5;
    color: #000000;
}

/* Reduced motion preference support */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ==========================================================================
   Container
   ========================================================================== */

.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    background-color: var(--bg-gray);
}

/* ==========================================================================
   Header - 90s Style with Gradient Panel
   ========================================================================== */

.header {
    display: flex;
    flex-wrap: wrap;
    gap: 0;
    margin-bottom: var(--spacing-lg);
    
    /* 90s beveled border - outset effect */
    border: 3px solid;
    border-color: var(--bevel-light) var(--bevel-dark) var(--bevel-dark) var(--bevel-light);
    background-color: var(--bg-gray);
}

/* Logo Box - Left side of header */
.header-logo-box {
    flex: 0 0 auto;
    width: 280px;
    height: 120px;
    background-color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
    overflow: hidden;
    
    /* Inset bevel for the logo area */
    border: 2px solid;
    border-color: var(--bevel-dark) var(--bevel-light) var(--bevel-light) var(--bevel-dark);
}

.header-logo {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    width: auto;
    height: auto;
}

.header-logo-fallback {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--purple-primary);
}

/* Gradient Panel - Right side of header */
.header-gradient-panel {
    flex: 1 1 auto;
    min-height: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
    
    /* Gradient: white to purple (left to right) */
    background: linear-gradient(
        to right,
        #ffffff 0%,
        #d4c4e8 25%,
        var(--purple-light) 50%,
        var(--purple-primary) 75%,
        var(--purple-deep) 100%
    );
    
    /* Inset bevel */
    border: 2px solid;
    border-color: var(--bevel-dark) var(--bevel-light) var(--bevel-light) var(--bevel-dark);
}

.header-title-text {
    font-family: var(--font-serif);
    font-size: 2rem;
    font-weight: normal;
    color: #ffffff;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
    letter-spacing: 0.05em;
}

/* ==========================================================================
   Main Content
   ========================================================================== */

.main-content {
    padding: var(--spacing-md);
    background-color: var(--bg-gray);
}

.page-title {
    font-family: var(--font-sans);
    font-size: 1.25rem;
    font-weight: bold;
    color: #000000;
    margin: 0 0 var(--spacing-sm) 0;
}

.title-rule {
    border: none;
    height: 2px;
    background: linear-gradient(
        to right,
        var(--bevel-dark),
        var(--bevel-darker)
    );
    margin: 0 0 var(--spacing-lg) 0;
}

/* ==========================================================================
   Project List - 90s Link Style
   ========================================================================== */

.project-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.project-row {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-xs);
    cursor: pointer;
    text-decoration: none;
    color: inherit;
    position: relative;
    
    /* Reset button styles for 90s link list look */
    background: none;
    border: none;
    font-size: inherit;
    font-family: inherit;
    text-align: left;
    width: 100%;
    
    /* For keyboard focus positioning */
    outline: none;
    
    /* Smooth hover area - prevent jitter */
    margin: 2px 0;
}

/* 90s-style icon placeholder box */
.project-icon-box {
    flex: 0 0 auto;
    width: 48px;
    height: 48px;
    background-color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    
    /* Inset bevel */
    border: 2px solid;
    border-color: var(--bevel-dark) var(--bevel-light) var(--bevel-light) var(--bevel-dark);
}

.project-icon {
    width: 40px;
    height: 40px;
    object-fit: contain;
}

/* Fallback icon (simple colored square) */
.project-icon-fallback {
    width: 24px;
    height: 24px;
    background: linear-gradient(135deg, var(--purple-light), var(--purple-primary));
}

.project-name {
    font-family: var(--font-sans);
    font-size: 1rem;
    color: var(--link-blue);
    text-decoration: underline;
}

/* Hover and focus states for project rows */
.project-row:hover .project-name,
.project-row:focus .project-name {
    color: var(--link-active);
}

.project-row:visited .project-name {
    color: var(--link-visited);
}

/* Focus visible styling for keyboard navigation */
.project-row:focus-visible {
    outline: 2px dashed var(--purple-primary);
    outline-offset: 2px;
}

/* Active/pressed state */
.project-row:active .project-name {
    color: var(--link-active);
}

/* ==========================================================================
   Footer
   ========================================================================== */

.footer {
    margin-top: var(--spacing-xl);
    padding: var(--spacing-md);
}

.footer-rule {
    border: none;
    height: 1px;
    background-color: var(--bevel-dark);
    margin: 0 0 var(--spacing-md) 0;
}

.footer-text {
    font-family: var(--font-sans);
    font-size: 0.875rem;
    color: #000000;
    margin: 0;
    text-align: center;
}

.footer-text a {
    color: var(--link-blue);
    text-decoration: underline;
}

.footer-text a:hover {
    color: var(--link-active);
}

.footer-copyright {
    font-family: var(--font-sans);
    font-size: 0.75rem;
    color: #666666;
    margin: var(--spacing-xs) 0 0 0;
    text-align: center;
}

/* ==========================================================================
   Modern Overlay - Desktop Card
   ========================================================================== */

.overlay-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: transparent;
    z-index: 1000;
    pointer-events: none;
    opacity: 0;
    transition: opacity var(--transition-medium);
}

.overlay-backdrop.active {
    pointer-events: auto;
    opacity: 1;
}

/* Desktop: backdrop doesn't block interaction with page */
@media (min-width: 769px) {
    .overlay-backdrop.active {
        pointer-events: none;
    }
    
    .overlay-backdrop.active .overlay-card {
        pointer-events: auto;
    }
}

/* Mobile: backdrop has semi-transparent background */
@media (max-width: 768px) {
    .overlay-backdrop.active {
        background-color: rgba(0, 0, 0, 0.5);
    }
}

.overlay-card {
    position: absolute;
    background-color: var(--overlay-bg);
    border-radius: 12px;
    box-shadow: 
        0 10px 25px -5px rgba(0, 0, 0, 0.15),
        0 8px 10px -6px rgba(0, 0, 0, 0.1);
    padding: var(--spacing-lg);
    min-width: 280px;
    max-width: 320px;
    opacity: 0;
    transform: translateY(-4px);
    transition: 
        opacity 0.2s cubic-bezier(0.4, 0, 0.2, 1),
        transform 0.2s cubic-bezier(0.4, 0, 0.2, 1),
        left 0.15s cubic-bezier(0.4, 0, 0.2, 1),
        top 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    pointer-events: auto;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.18);
    
    /* Add invisible padding area for easier hovering */
    position: absolute;
}

.overlay-card::before {
    content: '';
    position: absolute;
    top: -8px;
    left: -8px;
    right: -8px;
    bottom: -8px;
    pointer-events: auto;
}

.overlay-backdrop.active .overlay-card {
    opacity: 1;
    transform: translateY(0);
}

/* Mobile: Bottom sheet style */
@media (max-width: 768px) {
    .overlay-card {
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        max-width: 100%;
        min-width: 100%;
        border-radius: 20px 20px 0 0;
        padding: var(--spacing-lg) var(--spacing-lg) var(--spacing-xl) var(--spacing-lg);
        transform: translateY(100%);
        background: linear-gradient(to bottom, rgba(255, 255, 255, 0.98), rgba(255, 255, 255, 1));
        backdrop-filter: blur(20px);
    }
    
    .overlay-backdrop.active .overlay-card {
        transform: translateY(0);
    }
}

/* Close button */
.overlay-close {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    width: 28px;
    height: 28px;
    border: none;
    background: rgba(0, 0, 0, 0.05);
    font-size: 1.25rem;
    color: var(--overlay-text-muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: 
        background-color var(--transition-fast),
        color var(--transition-fast);
}

.overlay-close:hover {
    background-color: rgba(0, 0, 0, 0.1);
    color: var(--overlay-text);
}

.overlay-close:focus-visible {
    outline: 2px solid var(--purple-primary);
    outline-offset: 2px;
}

/* Desktop: Hide close button (overlay closes on mouse leave) */
@media (min-width: 769px) {
    .overlay-close {
        /* Keep visible for accessibility, but less prominent */
        opacity: 0.4;
    }
    
    .overlay-close:hover,
    .overlay-close:focus-visible {
        opacity: 1;
    }
}

/* Overlay content */
.overlay-icon-container {
    width: 56px;
    height: 56px;
    margin: 0 auto var(--spacing-md);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12);
    transition: transform 0.15s ease;
}

.overlay-icon {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: opacity 0.15s ease;
}

.overlay-title {
    font-family: var(--font-modern);
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--overlay-text);
    margin: 0 0 var(--spacing-sm) 0;
    text-align: center;
    letter-spacing: -0.01em;
    transition: opacity 0.15s ease;
}

.overlay-description {
    font-family: var(--font-modern);
    font-size: 0.875rem;
    color: var(--overlay-text-muted);
    margin: 0 0 var(--spacing-lg) 0;
    text-align: center;
    line-height: 1.5;
    display: none;
    transition: opacity 0.15s ease;
}

.overlay-description.has-content {
    display: block;
}

/* Action buttons */
.overlay-actions {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    align-items: center;
    transition: opacity 0.15s ease;
}

.overlay-action {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: 12px var(--spacing-lg);
    border-radius: 8px;
    font-family: var(--font-modern);
    font-size: 0.9375rem;
    font-weight: 500;
    text-decoration: none;
    transition: 
        background-color var(--transition-fast),
        transform var(--transition-fast),
        opacity var(--transition-fast),
        box-shadow var(--transition-fast);
}

.overlay-action:focus-visible {
    outline: 2px solid var(--purple-primary);
    outline-offset: 2px;
}

.overlay-action:active {
    transform: scale(0.98);
}

/* Primary action (website) */
.overlay-action--primary {
    background-color: var(--purple-primary);
    color: #ffffff;
    width: 100%;
    box-shadow: 0 2px 4px rgba(107, 76, 154, 0.2);
}

.overlay-action--primary:hover {
    background-color: var(--purple-deep);
    box-shadow: 0 4px 8px rgba(107, 76, 154, 0.3);
    transform: translateY(-1px);
}

/* App Store badge link - just the image */
.overlay-action--appstore {
    background: transparent;
    padding: 0;
    border: none;
    transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.overlay-action--appstore:hover {
    opacity: 0.85;
    transform: translateY(-1px);
}

.overlay-action--appstore img {
    height: 44px;
    width: auto;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
}

/* Secondary actions (Social) */
.overlay-action--secondary {
    background-color: #f5f5f7;
    color: var(--overlay-text);
    width: 100%;
    border: 1px solid #e5e5ea;
}

.overlay-action--secondary:hover {
    background-color: #e8e8ed;
    border-color: #d1d1d6;
}

/* Action icons (inline SVG or text) */
.overlay-action-icon {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

/* ==========================================================================
   Utility Classes
   ========================================================================== */

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ==========================================================================
   Responsive Adjustments
   ========================================================================== */

@media (max-width: 600px) {
    body {
        padding: var(--spacing-sm);
    }
    
    .header {
        flex-direction: column;
    }
    
    .header-logo-box {
        width: 100%;
        height: 60px;
    }
    
    .header-gradient-panel {
        min-height: 60px;
    }
    
    .header-title-text {
        font-size: 1.75rem;
    }
    
    .page-title {
        font-size: 1.125rem;
    }
}

/* ==========================================================================
   Print Styles
   ========================================================================== */

@media print {
    body {
        background-color: #ffffff;
    }
    
    .overlay-backdrop {
        display: none;
    }
    
    .header-gradient-panel {
        background: var(--purple-primary);
        -webkit-print-color-adjust: exact;
        print-color-adjust: exact;
    }
}