/* ===========================
   Acutus Custom Styles - Responsive & Accessibility Layer
   ===========================
   
   PURPOSE:
   Mobile-first responsive enhancements and WCAG AA accessibility features
   for Bootstrap-based pages using base.html.
   
   USAGE:
   - Use with base.html and pages that extend it
   - Pair with style.css for complete styling
   - NOT for standalone pages (use styles.css instead)
   
   INCLUDES:
   - Skip link (accessibility)
   - Focus states (WCAG 2.1 compliant)
   - Header enhancements with scroll effects
   - Navigation link animations
   - Button hover effects
   - Card transitions
   - Hero section radial gradient
   - Form validation styling
   - Loading states
   - Responsive typography (clamp-based)
   - Utility classes (text colors, backgrounds)
   - Print styles
   - Mobile breakpoints (767px, 768-1023px)
   - Reduced motion support
   - High contrast mode support
   
   CONSOLIDATION NOTE (Nov 2025):
   This file works with style.css for base.html pages.
   Standalone pages (help.html, examples.html) now only use styles.css.
   =========================== */

/* Import unified design system */
@import url('unified-design-system.css');

/* ===== CSS Variables for Consistency ===== */
:root {
    /* Legacy variables mapped to unified system */
    --primary-color: var(--acutus-primary);
    --primary-dark: var(--acutus-primary-dark);
    --bg-dark: var(--acutus-dark-800);
    --bg-dark-alt: var(--acutus-dark-600);
    --text-dark: var(--acutus-dark-800);
    --text-muted: var(--acutus-gray-500);
    --text-light: rgba(255, 255, 255, 0.9);
    --border-color: var(--acutus-gray-300);
    --border-color-light: rgba(0, 212, 255, 0.1);
    
    /* Spacing (mapped to unified system) */
    --spacing-xs: var(--acutus-space-1);
    --spacing-sm: var(--acutus-space-2);
    --spacing-md: var(--acutus-space-4);
    --spacing-lg: var(--acutus-space-6);
    --spacing-xl: var(--acutus-space-8);
    --spacing-xxl: var(--acutus-space-12);
    
    /* Border Radius (mapped to unified system) */
    --radius-sm: var(--acutus-radius-sm);
    --radius-md: var(--acutus-radius-md);
    --radius-lg: var(--acutus-radius-lg);
    --radius-xl: var(--acutus-radius-xl);
    
    /* Transitions (mapped to unified system) */
    --transition-fast: var(--acutus-transition-fast);
    --transition-base: var(--acutus-transition-base);
    --transition-slow: var(--acutus-transition-slow);
    
    /* Shadows (mapped to unified system) */
    --shadow-sm: var(--acutus-shadow-sm);
    --shadow-md: var(--acutus-shadow-md);
    --shadow-lg: var(--acutus-shadow-lg);
    --shadow-xl: var(--acutus-shadow-xl);
}

/* ===== Base Styles ===== */
* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--acutus-font-family);
    line-height: var(--acutus-leading-normal);
    color: var(--text-dark);
    background-color: var(--acutus-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

main {
    flex: 1;
}

/* ===== Skip Link (Accessibility) ===== */
.skip-link {
    position: absolute;
    top: -100px;
    left: 0;
    background: var(--primary-color);
    color: var(--bg-dark);
    padding: var(--acutus-space-4);
    text-decoration: none;
    font-weight: var(--acutus-weight-semibold);
    z-index: 10000;
    border-radius: 0 0 var(--radius-md) 0;
}

.skip-link:focus {
    top: 0;
    outline: 3px solid var(--primary-dark);
    outline-offset: 2px;
}

/* ===== Focus States (WCAG 2.1) ===== */
a:focus,
button:focus,
input:focus,
select:focus,
textarea:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

a:focus-visible,
button:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* ===== Header Enhancements ===== */
header {
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: all var(--transition-base);
}

header.scrolled {
    box-shadow: var(--acutus-shadow-lg);
}

/* Mobile Menu Animation */
.navbar-collapse {
    transition: all var(--transition-slow);
}

@media (max-width: 767px) {
    .navbar-collapse {
        background: var(--bg-dark);
        padding: var(--spacing-md);
        border-radius: var(--radius-md);
        margin-top: var(--spacing-md);
    }
}

/* ===== Navigation Links ===== */
.nav-link {
    position: relative;
    transition: color var(--transition-base);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: all var(--transition-base);
    transform: translateX(-50%);
}

.nav-link:hover::after,
.nav-link:focus::after {
    width: 100%;
}

/* ===== Buttons ===== */
.btn {
    transition: all var(--transition-base);
    font-weight: var(--acutus-weight-semibold);
    border-radius: var(--radius-md);
}

.btn-primary {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: var(--bg-dark);
}

.btn-primary:hover,
.btn-primary:focus {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-outline-primary {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.btn-outline-primary:hover,
.btn-outline-primary:focus {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: var(--bg-dark);
    transform: translateY(-2px);
}

/* ===== Cards ===== */
.card {
    transition: all var(--transition-slow);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--acutus-primary-light);
}

/* ===== Hero Section ===== */
.hero {
    background: linear-gradient(135deg, var(--bg-dark) 0%, var(--bg-dark-alt) 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 50% 50%, rgba(0, 212, 255, 0.1) 0%, transparent 70%);
    pointer-events: none;
}

/* ===== Animations ===== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

.pulse {
    animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

/* ===== Forms ===== */
.form-control:focus,
.form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.25rem rgba(0, 212, 255, 0.25);
}

.form-label {
    font-weight: var(--acutus-weight-semibold);
    margin-bottom: var(--spacing-sm);
}

.form-control,
.form-select {
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    transition: all var(--transition-base);
}

.form-control:hover,
.form-select:hover {
    border-color: var(--text-muted);
}

/* Form Validation */
.was-validated .form-control:valid,
.form-control.is-valid {
    border-color: var(--acutus-success);
}

.was-validated .form-control:invalid,
.form-control.is-invalid {
    border-color: var(--acutus-danger);
}

/* ===== Badges ===== */
.badge {
    font-weight: var(--acutus-weight-semibold);
    padding: var(--acutus-space-2) var(--acutus-space-3);
    border-radius: var(--radius-sm);
}

/* ===== Loading States ===== */
.loading {
    position: relative;
    pointer-events: none;
    opacity: 0.6;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid var(--primary-color);
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* ===== Responsive Typography ===== */
h1, h2, h3, h4, h5, h6 {
    font-weight: var(--acutus-weight-bold);
    line-height: var(--acutus-leading-tight);
    margin-bottom: var(--spacing-lg);
}

h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
}

h2 {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
}

h3 {
    font-size: clamp(1.5rem, 3.5vw, 2rem);
}

p {
    margin-bottom: var(--spacing-md);
}

/* ===== Utility Classes ===== */
.text-primary-custom {
    color: var(--primary-color) !important;
}

.bg-primary-custom {
    background-color: var(--primary-color) !important;
}

.bg-dark-custom {
    background: linear-gradient(135deg, var(--bg-dark) 0%, var(--bg-dark-alt) 100%);
}

.shadow-custom {
    box-shadow: var(--shadow-md);
}

.shadow-custom-lg {
    box-shadow: var(--shadow-lg);
}

/* ===== Accessibility Helpers ===== */
.visually-hidden {
    position: absolute !important;
    width: 1px !important;
    height: 1px !important;
    padding: 0 !important;
    margin: -1px !important;
    overflow: hidden !important;
    clip: rect(0, 0, 0, 0) !important;
    white-space: nowrap !important;
    border: 0 !important;
}

/* ===== Typography & Color Utility Classes ===== */
/* Use these classes instead of inline color styles for design consistency */

/* Text Colors */
.text-light-hero {
    color: var(--text-light) !important; /* White/near-white for hero sections */
}

.text-dark {
    color: var(--text-dark) !important; /* Dark color for headings */
}

.text-muted {
    color: var(--text-muted) !important; /* Muted gray for body text */
}

.text-acutus-accent {
    color: var(--primary-color) !important; /* Electric blue accent */
}

.text-white {
    color: var(--acutus-white) !important;
}

/* Background Gradients */
.bg-hero-gradient {
    background: linear-gradient(180deg, #0a0f1a 0%, var(--acutus-dark-800) 100%) !important;
}

.bg-dark-gradient {
    background: linear-gradient(135deg, #0a0f1a 0%, var(--acutus-dark-800) 100%) !important;
}

.bg-light-gradient {
    background: linear-gradient(180deg, #fafbfc 0%, var(--acutus-white) 100%) !important;
}

/* Background Colors */
.bg-acutus-accent {
    background-color: var(--primary-color) !important;
}

.bg-acutus-accent-tint {
    background-color: rgba(0, 212, 255, 0.1) !important; /* Translucent accent for chips/badges */
}

.bg-acutus-dark {
    background-color: var(--acutus-dark-800) !important;
}

/* Button Utilities */
.btn-acutus-primary {
    background: var(--primary-color);
    color: #0a0f1a;
    border: none;
    font-weight: 700;
    transition: all var(--transition-base);
}

.btn-acutus-primary:hover {
    background: var(--acutus-primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--acutus-shadow-primary);
}

/* ===== Print Styles ===== */
@media print {
    header, footer, .no-print {
        display: none !important;
    }
    
    body {
        color: #000;
        background: #fff;
    }
    
    a {
        text-decoration: underline;
    }
    
    a[href]::after {
        content: " (" attr(href) ")";
    }
}

/* ===== Mobile Breakpoints ===== */
@media (max-width: 767px) {
    :root {
        font-size: 14px;
    }
    
    .container {
        padding-left: var(--spacing-md);
        padding-right: var(--spacing-md);
    }
    
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.75rem;
    }
    
    h3 {
        font-size: 1.5rem;
    }
    
    .btn-lg {
        font-size: 1rem;
        padding: 0.75rem 1.5rem;
    }
}

/* ===== Tablet Breakpoint ===== */
@media (min-width: 768px) and (max-width: 1023px) {
    :root {
        font-size: 15px;
    }
}

/* ===== Reduced Motion (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 (Accessibility) ===== */
@media (prefers-contrast: high) {
    :root {
        --acutus-primary: #00ffff;
        --border-color: #000000;
    }
    
    .btn-outline-primary {
        border-width: 2px;
    }
}

/* ===== Dark Mode Support ===== */
@media (prefers-color-scheme: dark) {
    /* Future implementation for dark mode */
}