/* ==========================================================================
   Josh Pirtle Portfolio - Main Stylesheet
   Design System: Navy/Gray/White with Blue Accents
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Custom Properties (Design Tokens)
   -------------------------------------------------------------------------- */
:root {
    /* Colors - Light Mode */
    --color-primary: #0A1A2F;
    --color-primary-light: #1a3a5f;
    --color-accent: #4DB5FF;
    --color-accent-hover: #3A9EE6;
    --color-text: #333333;
    --color-text-light: #555555;
    --color-text-muted: #777777;
    --color-bg: #FFFFFF;
    --color-bg-alt: #F4F4F4;
    --color-bg-dark: #0A1A2F;
    --color-border: #E0E0E0;
    --color-white: #FFFFFF;

    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
    --font-size-base: 1rem;
    --line-height: 1.6;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;

    /* Borders & Shadows */
    --border-radius: 8px;
    --border-radius-sm: 6px;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.16);

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
}

/* Dark Mode Colors */
.dark {
    --color-primary: #E8ECF0;
    --color-primary-light: #B8C4D0;
    --color-text: #E8ECF0;
    --color-text-light: #B8C4D0;
    --color-text-muted: #8899AA;
    --color-bg: #0A1A2F;
    --color-bg-alt: #142840;
    --color-bg-dark: #061220;
    --color-border: #2A4A6F;
}

/* --------------------------------------------------------------------------
   Reset & Base Styles
   -------------------------------------------------------------------------- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: var(--line-height);
    color: var(--color-text);
    background-color: var(--color-bg);
    transition: background-color var(--transition-base), color var(--transition-base);
}

img {
    max-width: 100%;
    height: auto;
}

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

/* --------------------------------------------------------------------------
   Layout
   -------------------------------------------------------------------------- */
.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

section {
    padding: var(--spacing-xl) 0;
}

h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    text-align: center;
    color: var(--color-primary);
}

.dark h2 {
    color: var(--color-white);
}

.section-intro {
    text-align: center;
    font-size: 1.15rem;
    color: var(--color-text-light);
    max-width: 700px;
    margin: 0 auto var(--spacing-lg);
}

/* --------------------------------------------------------------------------
   Navigation
   -------------------------------------------------------------------------- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-sm) 0;
    transition: background-color var(--transition-base), border-color var(--transition-base);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-primary);
    text-decoration: none;
}

.dark .nav-logo {
    color: var(--color-white);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    list-style: none;
}

.nav-link {
    color: var(--color-text);
    font-weight: 500;
    font-size: 0.95rem;
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.nav-toggle span {
    display: block;
    width: 25px;
    height: 3px;
    background-color: var(--color-primary);
    border-radius: 2px;
    transition: var(--transition-fast);
}

.dark .nav-toggle span {
    background-color: var(--color-white);
}

/* Dark Mode Toggle */
.dark-mode-toggle {
    background: none;
    border: 2px solid var(--color-border);
    border-radius: 50px;
    padding: 0.35rem 0.75rem;
    cursor: pointer;
    font-size: 1rem;
    display: flex;
    align-items: center;
    gap: 0.25rem;
    transition: border-color var(--transition-fast);
}

.dark-mode-toggle:hover {
    border-color: var(--color-accent);
}

.icon-moon {
    display: none;
}

.dark .icon-sun {
    display: none;
}

.dark .icon-moon {
    display: inline;
}

/* Mobile Navigation */
@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        background-color: var(--color-bg);
        flex-direction: column;
        padding: var(--spacing-md);
        gap: var(--spacing-sm);
        border-bottom: 1px solid var(--color-border);
        transform: translateY(-150%);
        opacity: 0;
        transition: transform var(--transition-base), opacity var(--transition-base);
    }

    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
    }

    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 6px);
    }

    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -6px);
    }
}

/* --------------------------------------------------------------------------
   Hero Section
   -------------------------------------------------------------------------- */
.hero {
    background-color: var(--color-bg-dark);
    color: var(--color-white);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: calc(var(--spacing-xl) + 60px) var(--spacing-md) var(--spacing-xl);
}

.dark .hero {
    background-color: #061220;
}

.hero-content {
    max-width: 800px;
}

.hero h1 {
    font-size: 4rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: 1.5rem;
    font-weight: 400;
    margin-bottom: var(--spacing-sm);
    color: rgba(255, 255, 255, 0.9);
    letter-spacing: 0.02em;
}

.hero-description {
    font-size: 1.15rem;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--spacing-lg);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
}

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */
.cta-button,
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background-color: var(--color-accent);
    color: var(--color-white);
    padding: 1rem 2rem;
    text-decoration: none;
    border-radius: var(--border-radius-sm);
    font-size: 1rem;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: background-color var(--transition-base), transform var(--transition-fast);
}

.cta-button:hover,
.btn:hover {
    background-color: var(--color-accent-hover);
    color: var(--color-white);
    transform: translateY(-2px);
}

.cta-secondary {
    background-color: transparent;
    border: 2px solid var(--color-white);
}

.cta-secondary:hover {
    background-color: var(--color-white);
    color: var(--color-bg-dark);
}

.btn {
    padding: 0.75rem 1.5rem;
    font-size: 0.95rem;
}

.btn-disabled {
    background-color: var(--color-text-muted);
    cursor: not-allowed;
    opacity: 0.7;
}

.btn-disabled:hover {
    background-color: var(--color-text-muted);
    transform: none;
}

/* --------------------------------------------------------------------------
   Services Section
   -------------------------------------------------------------------------- */
.services {
    background-color: var(--color-bg);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.service-card {
    display: block;
    background-color: var(--color-bg-alt);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    text-decoration: none;
    color: var(--color-text);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
    border: 1px solid var(--color-border);
}

.service-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    color: var(--color-text);
}

.service-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
}

.service-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--color-primary);
}

.dark .service-card h3 {
    color: var(--color-white);
}

.service-card p {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-sm);
}

.service-link {
    display: inline-block;
    color: var(--color-accent);
    font-weight: 600;
    font-size: 0.95rem;
}

/* --------------------------------------------------------------------------
   Portfolio / Projects Section
   -------------------------------------------------------------------------- */
.portfolio {
    background-color: var(--color-bg-alt);
}

.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

.project-card {
    background-color: var(--color-bg);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: box-shadow var(--transition-base), transform var(--transition-base);
    border: 1px solid var(--color-border);
}

.project-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.project-image {
    width: 100%;
    height: 180px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.project-image.tech-support {
    background: linear-gradient(135deg, #0A1A2F 0%, #1a3a5f 100%);
}

.project-image.ai-consulting {
    background: linear-gradient(135deg, #0A1A2F 0%, #2a4a7f 100%);
}

.project-image.web-design {
    background: linear-gradient(135deg, #0A1A2F 0%, #3a5a9f 100%);
}

.project-image.voice-agent {
    background: linear-gradient(135deg, #0A1A2F 0%, #4a3a8f 100%);
}

.project-badge {
    position: absolute;
    top: var(--spacing-sm);
    left: var(--spacing-sm);
    background-color: var(--color-accent);
    color: var(--color-white);
    padding: 0.25rem 0.75rem;
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
}

.project-content {
    padding: var(--spacing-md);
}

.project-content h3 {
    font-size: 1.35rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--color-primary);
}

.dark .project-content h3 {
    color: var(--color-white);
}

.project-content p {
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-light);
}

/* --------------------------------------------------------------------------
   About Section
   -------------------------------------------------------------------------- */
.about {
    background-color: var(--color-bg);
}

.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-lg);
    align-items: start;
    max-width: 1000px;
    margin: 0 auto;
}

.about-text p {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-light);
}

.about-text p:first-child {
    font-size: 1.2rem;
    color: var(--color-text);
}

.about-highlights {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.highlight-item {
    background-color: var(--color-bg-alt);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    text-align: center;
    border: 1px solid var(--color-border);
}

.highlight-number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-accent);
    margin-bottom: 0.25rem;
}

.highlight-label {
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

@media (max-width: 768px) {
    .about-content {
        grid-template-columns: 1fr;
    }

    .about-highlights {
        flex-direction: row;
        flex-wrap: wrap;
    }

    .highlight-item {
        flex: 1;
        min-width: 140px;
    }
}

/* --------------------------------------------------------------------------
   Testimonials Section
   -------------------------------------------------------------------------- */
.testimonials {
    background-color: var(--color-bg-alt);
}

.testimonial-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.testimonial-card {
    background-color: var(--color-bg);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
    position: relative;
}

.testimonial-card::before {
    content: '"';
    position: absolute;
    top: var(--spacing-sm);
    left: var(--spacing-md);
    font-size: 4rem;
    color: var(--color-accent);
    opacity: 0.2;
    font-family: Georgia, serif;
    line-height: 1;
}

.testimonial-text {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-sm);
    font-style: italic;
    position: relative;
    z-index: 1;
}

.testimonial-author {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.author-name {
    font-weight: 600;
    color: var(--color-primary);
}

.dark .author-name {
    color: var(--color-white);
}

.author-title {
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

/* --------------------------------------------------------------------------
   Contact Section
   -------------------------------------------------------------------------- */
.contact {
    background-color: var(--color-bg-dark);
    color: var(--color-white);
    text-align: center;
}

.dark .contact {
    background-color: #061220;
}

.contact h2 {
    color: var(--color-white);
}

.contact-intro {
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: var(--spacing-md);
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

.contact-buttons {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: var(--spacing-md);
}

.contact-note {
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.6);
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.site-footer {
    background-color: var(--color-bg-dark);
    color: var(--color-white);
    padding: var(--spacing-lg) 0 var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.dark .site-footer {
    background-color: #061220;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.footer-logo {
    font-size: 1.25rem;
    font-weight: 700;
    display: block;
    margin-bottom: var(--spacing-xs);
}

.footer-tagline {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.95rem;
}

.footer-nav,
.footer-links {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.footer-nav a,
.footer-links a {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.95rem;
    transition: color var(--transition-fast);
}

.footer-nav a:hover,
.footer-links a:hover {
    color: var(--color-accent);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.9rem;
}

@media (max-width: 768px) {
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .footer-nav,
    .footer-links {
        flex-direction: row;
        justify-content: center;
        flex-wrap: wrap;
        gap: var(--spacing-sm);
    }
}

/* --------------------------------------------------------------------------
   Modal
   -------------------------------------------------------------------------- */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.75);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-base), visibility var(--transition-base);
    padding: var(--spacing-md);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    background-color: var(--color-bg);
    border-radius: var(--border-radius);
    max-width: 600px;
    width: 100%;
    max-height: 80vh;
    overflow-y: auto;
    position: relative;
    transform: scale(0.9);
    transition: transform var(--transition-base);
}

.modal-overlay.active .modal {
    transform: scale(1);
}

.modal-close {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    background: none;
    border: none;
    font-size: 2rem;
    cursor: pointer;
    color: var(--color-text-muted);
    line-height: 1;
    padding: 0.5rem;
    transition: color var(--transition-fast);
}

.modal-close:hover {
    color: var(--color-text);
}

.modal-content {
    padding: var(--spacing-md);
}

.modal-content h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary);
}

.dark .modal-content h3 {
    color: var(--color-white);
}

.modal-content p {
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-light);
    line-height: 1.7;
}

.modal-content ul {
    margin-left: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-light);
}

.modal-content li {
    margin-bottom: 0.5rem;
}

/* --------------------------------------------------------------------------
   Responsive Design
   -------------------------------------------------------------------------- */
@media (max-width: 768px) {
    h2 {
        font-size: 2rem;
    }

    section {
        padding: var(--spacing-lg) 0;
    }

    .hero {
        min-height: auto;
        padding: calc(var(--spacing-lg) + 80px) var(--spacing-sm) var(--spacing-lg);
    }

    .hero h1 {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.1rem;
    }

    .hero-description {
        font-size: 1rem;
    }

    .project-grid,
    .services-grid,
    .testimonial-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .cta-button {
        padding: 0.875rem 1.5rem;
        font-size: 0.95rem;
        width: 100%;
        justify-content: center;
    }

    .container {
        padding: 0 var(--spacing-sm);
    }

    .hero-buttons {
        flex-direction: column;
    }
}

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

/* Prevent body scroll when modal is open */
body.modal-open {
    overflow: hidden;
}

/* --------------------------------------------------------------------------
   Skip Link (Accessibility)
   -------------------------------------------------------------------------- */
.skip-link {
    position: absolute;
    top: -100%;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--color-accent);
    color: var(--color-white);
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius-sm);
    font-weight: 600;
    z-index: 9999;
    transition: top var(--transition-fast);
}

.skip-link:focus {
    top: 10px;
    outline: 3px solid var(--color-white);
    outline-offset: 2px;
}

/* --------------------------------------------------------------------------
   Focus States (Accessibility)
   -------------------------------------------------------------------------- */
a:focus,
button:focus,
input:focus,
textarea:focus,
select:focus,
[tabindex]:focus {
    outline: 3px solid var(--color-accent);
    outline-offset: 2px;
}

a:focus:not(:focus-visible),
button:focus:not(:focus-visible) {
    outline: none;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible,
[tabindex]:focus-visible {
    outline: 3px solid var(--color-accent);
    outline-offset: 2px;
}

/* --------------------------------------------------------------------------
   Back to Top Button
   -------------------------------------------------------------------------- */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    background-color: var(--color-accent);
    color: var(--color-white);
    border: none;
    border-radius: 50%;
    font-size: 1.5rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: opacity var(--transition-base), visibility var(--transition-base), transform var(--transition-base), background-color var(--transition-fast);
    z-index: 999;
    box-shadow: var(--shadow-md);
}

.back-to-top:hover {
    background-color: var(--color-accent-hover);
    transform: translateY(-2px);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

@media (max-width: 480px) {
    .back-to-top {
        bottom: 1rem;
        right: 1rem;
        width: 44px;
        height: 44px;
        font-size: 1.25rem;
    }
}

/* --------------------------------------------------------------------------
   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;
    }
}

/* --------------------------------------------------------------------------
   Print Styles
   -------------------------------------------------------------------------- */
@media print {
    .navbar,
    .back-to-top,
    .dark-mode-toggle,
    .modal-overlay {
        display: none !important;
    }

    body {
        background: white !important;
        color: black !important;
    }

    a[href^="http"]::after {
        content: " (" attr(href) ")";
        font-size: 0.8em;
    }
}