/**
 * Michael G. Nichols - Personal Website Styles
 * Version: 2.0
 * Last Updated: December 2025
 * 
 * CSS Architecture:
 * 1. CSS Custom Properties (Variables)
 * 2. Reset & Base Styles
 * 3. Typography
 * 4. Layout Components
 * 5. Navigation
 * 6. Hero Section
 * 7. Content Sections
 * 8. Components (Cards, Buttons, Forms)
 * 9. Footer
 * 10. Utility Classes
 * 11. Accessibility
 * 12. Media Queries
 * 13. Print Styles
 */

/* =============================================================================
   1. CSS CUSTOM PROPERTIES
   ============================================================================= */

:root {
    /* Colors - Dark Theme */
    --color-dark: #0f1419;
    --color-dark-soft: #1a1f26;
    --color-dark-muted: #2d333b;
    
    /* Colors - Navy Brand */
    --color-navy: #1f3a5f;
    --color-navy-light: #2a4a73;
    --color-navy-dark: #162d4a;
    
    /* Colors - Neutrals */
    --color-white: #ffffff;
    --color-off-white: #f8f9fa;
    --color-gray-100: #f1f3f5;
    --color-gray-200: #e9ecef;
    --color-gray-300: #dee2e6;
    --color-gray-400: #ced4da;
    --color-gray-500: #868e96;
    --color-gray-600: #6c757d;
    --color-gray-700: #495057;
    --color-gray-800: #343a40;
    --color-gray-900: #212529;
    
    /* Colors - Accent (Phaneros Teal) */
    --color-accent: #7eb8da;
    --color-accent-soft: #9ecae8;
    --color-accent-dark: #5a9bc4;
    
    /* Colors - Semantic */
    --color-text-primary: var(--color-gray-800);
    --color-text-secondary: var(--color-gray-600);
    --color-text-muted: var(--color-gray-500);
    --color-text-inverse: var(--color-white);
    --color-link: var(--color-navy);
    --color-link-hover: var(--color-accent);
    
    /* Typography */
    --font-serif: 'Libre Baskerville', Georgia, 'Times New Roman', serif;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    
    --font-size-xs: 0.75rem;     /* 12px */
    --font-size-sm: 0.875rem;    /* 14px */
    --font-size-base: 1rem;      /* 16px */
    --font-size-md: 1.125rem;    /* 18px */
    --font-size-lg: 1.25rem;     /* 20px */
    --font-size-xl: 1.5rem;      /* 24px */
    --font-size-2xl: 2rem;       /* 32px */
    --font-size-3xl: 2.5rem;     /* 40px */
    --font-size-4xl: 3rem;       /* 48px */
    --font-size-5xl: 3.5rem;     /* 56px */
    
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    
    --line-height-tight: 1.25;
    --line-height-snug: 1.375;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.625;
    --line-height-loose: 1.75;
    
    --letter-spacing-tight: -0.02em;
    --letter-spacing-normal: 0;
    --letter-spacing-wide: 0.05em;
    --letter-spacing-wider: 0.1em;
    --letter-spacing-widest: 0.15em;
    
    /* Spacing Scale */
    --spacing-0: 0;
    --spacing-1: 0.25rem;   /* 4px */
    --spacing-2: 0.5rem;    /* 8px */
    --spacing-3: 0.75rem;   /* 12px */
    --spacing-4: 1rem;      /* 16px */
    --spacing-5: 1.25rem;   /* 20px */
    --spacing-6: 1.5rem;    /* 24px */
    --spacing-8: 2rem;      /* 32px */
    --spacing-10: 2.5rem;   /* 40px */
    --spacing-12: 3rem;     /* 48px */
    --spacing-16: 4rem;     /* 64px */
    --spacing-20: 5rem;     /* 80px */
    --spacing-24: 6rem;     /* 96px */
    --spacing-32: 8rem;     /* 128px */
    
    /* Layout */
    --max-width-xs: 20rem;      /* 320px */
    --max-width-sm: 24rem;      /* 384px */
    --max-width-md: 28rem;      /* 448px */
    --max-width-lg: 32rem;      /* 512px */
    --max-width-xl: 36rem;      /* 576px */
    --max-width-2xl: 42rem;     /* 672px */
    --max-width-3xl: 48rem;     /* 768px */
    --max-width-4xl: 56rem;     /* 896px */
    --max-width-5xl: 64rem;     /* 1024px */
    --max-width-6xl: 72rem;     /* 1152px */
    --max-width-7xl: 80rem;     /* 1280px */
    --max-width-content: 75rem; /* 1200px */
    --max-width-narrow: 50rem;  /* 800px */
    
    /* Borders */
    --border-radius-sm: 0.25rem;
    --border-radius-md: 0.375rem;
    --border-radius-lg: 0.5rem;
    --border-radius-xl: 0.75rem;
    --border-radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;
    
    /* Z-index Scale */
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-fixed: 300;
    --z-modal-backdrop: 400;
    --z-modal: 500;
    --z-popover: 600;
    --z-tooltip: 700;
    
    /* Focus Ring */
    --focus-ring: 0 0 0 3px rgba(31, 58, 95, 0.4);
    --focus-ring-accent: 0 0 0 3px rgba(126, 184, 218, 0.4);
}

/* =============================================================================
   2. RESET & BASE STYLES
   ============================================================================= */

*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 100%; /* Respects user browser settings */
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    -moz-text-size-adjust: 100%;
    text-size-adjust: 100%;
}

/* Reduce motion for users who prefer it */
@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }
    
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

body {
    font-family: var(--font-sans);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-normal);
    line-height: var(--line-height-relaxed);
    color: var(--color-text-primary);
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

/* Remove default list styles */
ul,
ol {
    list-style: none;
}

/* Media elements */
img,
picture,
video,
canvas,
svg {
    display: block;
    max-width: 100%;
    height: auto;
}

/* Inherit fonts for form elements */
input,
button,
textarea,
select {
    font: inherit;
    color: inherit;
}

/* Remove default button styles */
button {
    background: none;
    border: none;
    cursor: pointer;
}

/* Remove anchor underlines by default */
a {
    color: inherit;
    text-decoration: none;
}

/* Prevent text overflow */
p,
h1,
h2,
h3,
h4,
h5,
h6 {
    overflow-wrap: break-word;
}

/* =============================================================================
   3. TYPOGRAPHY
   ============================================================================= */

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-serif);
    font-weight: var(--font-weight-bold);
    line-height: var(--line-height-tight);
    color: var(--color-dark);
    letter-spacing: var(--letter-spacing-tight);
}

h1 {
    font-size: clamp(var(--font-size-2xl), 5vw, var(--font-size-5xl));
}

h2 {
    font-size: clamp(var(--font-size-xl), 3vw, var(--font-size-3xl));
}

h3 {
    font-size: clamp(var(--font-size-md), 2vw, var(--font-size-xl));
}

h4 {
    font-size: var(--font-size-lg);
}

p {
    margin-bottom: var(--spacing-4);
}

p:last-child {
    margin-bottom: 0;
}

strong,
b {
    font-weight: var(--font-weight-semibold);
}

em,
i {
    font-style: italic;
}

small {
    font-size: var(--font-size-sm);
}

/* =============================================================================
   4. LAYOUT COMPONENTS
   ============================================================================= */

.container {
    width: 100%;
    max-width: var(--max-width-content);
    margin-inline: auto;
    padding-inline: var(--spacing-6);
}

.section {
    padding-block: var(--spacing-24);
    padding-inline: var(--spacing-6);
}

.section-light {
    background-color: var(--color-white);
}

.section-dark {
    background-color: var(--color-dark);
}

.section-dark h2,
.section-dark h3,
.section-dark h4 {
    color: var(--color-white);
}

.section-dark p {
    color: var(--color-gray-200);
}

.section-accent {
    background-color: var(--color-navy);
}

.section-accent h2,
.section-accent h3 {
    color: var(--color-white);
}

.section-accent p {
    color: var(--color-gray-200);
}

.section-title {
    text-align: center;
    margin-bottom: var(--spacing-16);
}

/* =============================================================================
   5. NAVIGATION
   ============================================================================= */

.nav {
    position: fixed;
    inset-inline: 0;
    top: 0;
    z-index: var(--z-fixed);
    background-color: rgba(15, 20, 25, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: var(--max-width-content);
    margin-inline: auto;
    padding: var(--spacing-4) var(--spacing-6);
}

.nav-logo {
    font-family: var(--font-serif);
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
    color: var(--color-white);
    letter-spacing: var(--letter-spacing-wide);
    transition: color var(--transition-base);
}

.nav-logo:hover {
    color: var(--color-accent);
}

.nav-logo:focus-visible {
    outline: none;
    box-shadow: var(--focus-ring-accent);
    border-radius: var(--border-radius-sm);
}

.nav-links {
    display: flex;
    gap: var(--spacing-8);
    align-items: center;
}

.nav-links a {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-gray-300);
    transition: color var(--transition-base);
}

.nav-links a:hover {
    color: var(--color-white);
}

.nav-links a:focus-visible {
    outline: none;
    box-shadow: var(--focus-ring-accent);
    border-radius: var(--border-radius-sm);
}

.nav-cta {
    background-color: var(--color-accent);
    color: var(--color-dark) !important;
    padding: var(--spacing-2) var(--spacing-4);
    border-radius: var(--border-radius-md);
    transition: background-color var(--transition-base);
}

.nav-cta:hover {
    background-color: var(--color-accent-soft) !important;
}

/* Mobile Navigation Toggle */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: var(--spacing-2);
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background-color: var(--color-white);
    transition: transform var(--transition-base), opacity var(--transition-base);
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
    opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* =============================================================================
   6. HERO SECTION
   ============================================================================= */

.hero {
    display: flex;
    align-items: center;
    min-height: 100vh;
    min-height: 100dvh; /* Dynamic viewport height for mobile */
    background: linear-gradient(135deg, var(--color-dark) 0%, var(--color-dark-soft) 50%, var(--color-navy) 100%);
    padding-block: var(--spacing-32);
    padding-inline: var(--spacing-6);
    padding-top: calc(var(--spacing-32) + 60px); /* Account for fixed nav */
}

.hero-content {
    max-width: var(--max-width-narrow);
    margin-inline: auto;
}

.hero-tagline {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    text-transform: uppercase;
    letter-spacing: var(--letter-spacing-widest);
    color: var(--color-accent);
    margin-bottom: var(--spacing-4);
}

.hero-title {
    color: var(--color-white);
    margin-bottom: var(--spacing-6);
}

.hero-description {
    font-size: var(--font-size-md);
    color: var(--color-gray-300);
    margin-bottom: var(--spacing-8);
    max-width: 600px;
}

.hero-cta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-4);
}

/* =============================================================================
   7. CONTENT SECTIONS
   ============================================================================= */

/* Intro Section */
.intro-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: var(--spacing-20);
    align-items: start;
}

.intro-text h2 {
    margin-bottom: var(--spacing-6);
}

.intro-text p {
    color: var(--color-text-secondary);
}

.intro-text .link-arrow {
    display: inline-block;
    margin-top: var(--spacing-4);
}

.intro-credentials {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-6);
}

.credential {
    background-color: var(--color-gray-100);
    padding: var(--spacing-6);
    border-radius: var(--border-radius-lg);
    border-left: 3px solid var(--color-accent);
}

.credential-label {
    display: block;
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    text-transform: uppercase;
    letter-spacing: var(--letter-spacing-wider);
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-2);
}

.credential h3 {
    font-size: var(--font-size-md);
    margin-bottom: var(--spacing-2);
}

.credential p {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    margin-bottom: 0;
}

.credential-publisher {
    font-style: italic;
    margin-top: var(--spacing-2) !important;
}

/* Services Section */
.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-6);
}

.service-card {
    padding: var(--spacing-8);
    background-color: var(--color-dark-soft);
    border-radius: var(--border-radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: border-color var(--transition-base);
}

.service-card:hover {
    border-color: var(--color-accent);
}

.service-card h3 {
    margin-bottom: var(--spacing-4);
}

.service-card p {
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-4);
}

.service-card .link-arrow {
    color: var(--color-accent);
}

/* Stats Section */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-6);
    margin-bottom: var(--spacing-16);
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-family: var(--font-serif);
    font-size: clamp(var(--font-size-2xl), 4vw, var(--font-size-4xl));
    font-weight: var(--font-weight-bold);
    color: var(--color-navy);
    margin-bottom: var(--spacing-2);
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.recognition {
    text-align: center;
    padding-top: var(--spacing-8);
    border-top: 1px solid var(--color-gray-200);
}

.recognition-label {
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    text-transform: uppercase;
    letter-spacing: var(--letter-spacing-wider);
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-4);
}

.recognition-logos {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

/* CTA Block */
.cta-block {
    text-align: center;
    max-width: 600px;
    margin-inline: auto;
}

.cta-block h2 {
    color: var(--color-white);
    margin-bottom: var(--spacing-4);
}

.cta-block p {
    margin-bottom: var(--spacing-6);
}

/* =============================================================================
   8. COMPONENTS
   ============================================================================= */

/* Buttons */
.btn {
    display: inline-block;
    padding: var(--spacing-4) var(--spacing-6);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    text-align: center;
    border-radius: var(--border-radius-md);
    transition: all var(--transition-base);
    cursor: pointer;
}

.btn:focus-visible {
    outline: none;
    box-shadow: var(--focus-ring-accent);
}

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

.btn-primary:hover {
    background-color: var(--color-accent-soft);
    transform: translateY(-1px);
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-white);
    border: 1px solid var(--color-gray-500);
}

.btn-secondary:hover {
    border-color: var(--color-white);
    background-color: rgba(255, 255, 255, 0.05);
}

/* Link Arrow */
.link-arrow {
    display: inline-block;
    font-weight: var(--font-weight-medium);
    color: var(--color-navy);
    transition: color var(--transition-base);
}

.link-arrow:hover {
    color: var(--color-accent);
}

.link-arrow:focus-visible {
    outline: none;
    box-shadow: var(--focus-ring);
    border-radius: var(--border-radius-sm);
}

/* Quote Block */
.quote-block {
    background-color: var(--color-gray-100);
    padding: var(--spacing-8);
    border-left: 4px solid var(--color-accent);
    margin-block: var(--spacing-8);
    border-radius: 0 var(--border-radius-lg) var(--border-radius-lg) 0;
}

.quote-block p {
    font-family: var(--font-serif);
    font-size: var(--font-size-md);
    font-style: italic;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-4);
}

.quote-block cite {
    font-family: var(--font-sans);
    font-size: var(--font-size-sm);
    font-style: normal;
    color: var(--color-text-muted);
}

/* Feature List */
.feature-list {
    margin-block: var(--spacing-6);
}

.feature-list li {
    position: relative;
    padding-left: var(--spacing-6);
    margin-bottom: var(--spacing-4);
}

.feature-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.6em;
    width: 8px;
    height: 8px;
    background-color: var(--color-accent);
    border-radius: var(--border-radius-full);
}

.section-dark .feature-list li {
    color: var(--color-gray-200);
}

/* Speaking List */
.speaking-list {
    display: grid;
    gap: var(--spacing-6);
}

.speaking-item {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: var(--spacing-6);
    padding-bottom: var(--spacing-6);
    border-bottom: 1px solid var(--color-gray-200);
}

.speaking-type {
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    text-transform: uppercase;
    letter-spacing: var(--letter-spacing-wider);
    color: var(--color-accent);
}

.speaking-item h3 {
    font-family: var(--font-sans);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-2);
}

.speaking-item p {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

/* Forms */
.contact-form {
    max-width: 600px;
    margin-inline: auto;
}

.form-group {
    margin-bottom: var(--spacing-6);
}

.form-group label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-2);
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: var(--spacing-4);
    font-size: var(--font-size-base);
    background-color: var(--color-white);
    border: 1px solid var(--color-gray-300);
    border-radius: var(--border-radius-md);
    transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--color-navy);
    box-shadow: var(--focus-ring);
}

.form-group textarea {
    min-height: 150px;
    resize: vertical;
}

.contact-info {
    margin-top: var(--spacing-16);
    padding-top: var(--spacing-8);
    border-top: 1px solid var(--color-gray-200);
    text-align: center;
}

.contact-info p {
    color: var(--color-text-secondary);
}

.contact-info a {
    color: var(--color-navy);
    font-weight: var(--font-weight-medium);
}

.contact-info a:hover {
    color: var(--color-accent);
}

/* Page Headers */
.page-header {
    background: linear-gradient(135deg, var(--color-dark) 0%, var(--color-navy) 100%);
    padding-block: var(--spacing-24);
    padding-inline: var(--spacing-6);
    padding-top: calc(var(--spacing-24) + 60px);
    text-align: center;
}

.page-header h1 {
    color: var(--color-white);
    margin-bottom: var(--spacing-4);
}

.page-header p {
    color: var(--color-gray-300);
    max-width: 600px;
    margin-inline: auto;
    font-size: var(--font-size-md);
}

/* Content Sections */
.content-section {
    padding-block: var(--spacing-16);
    padding-inline: var(--spacing-6);
}

.content-section h2 {
    margin-bottom: var(--spacing-6);
}

.content-narrow {
    max-width: var(--max-width-narrow);
    margin-inline: auto;
}

/* About Photo */
.about-intro {
    display: flex;
    gap: var(--spacing-8);
    align-items: flex-start;
}

.about-photo {
    width: 180px;
    flex-shrink: 0;
    border-radius: var(--border-radius-lg);
}

.about-text h2 {
    margin-top: 0;
}

@media (max-width: 768px) {
    .about-intro {
        flex-direction: column;
    }
    
    .about-photo {
        width: 150px;
        margin-inline: auto;
    }
}

/* =============================================================================
   9. FOOTER
   ============================================================================= */

.footer {
    background-color: var(--color-dark);
    padding: var(--spacing-10) var(--spacing-6);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: var(--max-width-content);
    margin-inline: auto;
    margin-bottom: var(--spacing-6);
}

.footer-name {
    font-family: var(--font-serif);
    font-weight: var(--font-weight-bold);
    color: var(--color-white);
    margin-bottom: var(--spacing-2);
}

.footer-location {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.footer-links {
    display: flex;
    gap: var(--spacing-6);
}

.footer-links a {
    font-size: var(--font-size-sm);
    color: var(--color-gray-400);
    transition: color var(--transition-base);
}

.footer-links a:hover {
    color: var(--color-white);
}

.footer-links a:focus-visible {
    outline: none;
    box-shadow: var(--focus-ring-accent);
    border-radius: var(--border-radius-sm);
}

.footer-links svg {
    display: block;
}

.footer-copyright {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    text-align: center;
    padding-top: var(--spacing-6);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    max-width: var(--max-width-content);
    margin-inline: auto;
}

/* =============================================================================
   10. 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;
}

.text-center {
    text-align: center;
}

.text-accent {
    color: var(--color-accent);
}

/* =============================================================================
   11. ACCESSIBILITY
   ============================================================================= */

/* Skip Link */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background-color: var(--color-accent);
    color: var(--color-dark);
    padding: var(--spacing-2) var(--spacing-4);
    font-weight: var(--font-weight-semibold);
    z-index: calc(var(--z-modal) + 1);
    transition: top var(--transition-base);
}

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

/* Focus styles already defined on interactive elements */

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --color-accent: #e6b800;
        --color-gray-300: #c0c0c0;
    }
    
    .btn,
    .nav-cta {
        border: 2px solid currentColor;
    }
}

/* =============================================================================
   12. MEDIA QUERIES
   ============================================================================= */

/* Tablet */
@media (max-width: 1024px) {
    .intro-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-12);
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Mobile */
@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        background-color: var(--color-dark);
        padding: var(--spacing-6);
        gap: var(--spacing-4);
        border-top: 1px solid rgba(255, 255, 255, 0.1);
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .hero {
        min-height: auto;
        padding-top: calc(var(--spacing-16) + 60px);
        padding-bottom: var(--spacing-16);
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .hero-cta .btn {
        text-align: center;
    }
    
    .section {
        padding-block: var(--spacing-16);
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        flex-direction: column;
        gap: var(--spacing-6);
        text-align: center;
    }
    
    .speaking-item {
        grid-template-columns: 1fr;
        gap: var(--spacing-2);
    }
}

/* Small Mobile */
@media (max-width: 480px) {
    :root {
        --spacing-6: 1rem;
    }
    
    .container,
    .section {
        padding-inline: var(--spacing-4);
    }
}

/* =============================================================================
   13. PRINT STYLES
   ============================================================================= */

@media print {
    *,
    *::before,
    *::after {
        background: transparent !important;
        color: #000 !important;
        box-shadow: none !important;
        text-shadow: none !important;
    }
    
    a,
    a:visited {
        text-decoration: underline;
    }
    
    a[href]::after {
        content: " (" attr(href) ")";
    }
    
    .nav,
    .hero-cta,
    .btn,
    .footer {
        display: none;
    }
    
    .hero {
        min-height: auto;
        padding: var(--spacing-8);
    }
    
    .section {
        padding: var(--spacing-4);
        page-break-inside: avoid;
    }
}