/* Reset and Base Styles */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

/* Custom Properties (CSS Variables) */
:root {
    /* Colors - Texas Rangers inspired palette */
    --primary-navy: #0A1F44;
    --accent-red: #C62828;
    --background-light: #F8FAFC;
    --text-slate: #1F2937;
    --text-muted: #6B7280;
    --white: #FFFFFF;
    --border-light: #E5E7EB;
    --shadow-light: rgba(0, 0, 0, 0.1);
    --shadow-medium: rgba(0, 0, 0, 0.15);
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
    --font-heading: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
    
    /* Font Sizes */
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;
    --text-4xl: 2.25rem;
    --text-5xl: 3rem;
    
    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    
    /* Container */
    --container-max-width: 1200px;
    
    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 250ms ease-in-out;
    --transition-slow: 350ms ease-in-out;
    
    /* Breakpoints */
    --bp-sm: 640px;
    --bp-md: 768px;
    --bp-lg: 1024px;
    --bp-xl: 1280px;
}

/* Base HTML Elements */
html {
    scroll-behavior: smooth;
    font-size: 16px;
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }
}

body {
    font-family: var(--font-primary);
    font-size: var(--text-base);
    line-height: 1.6;
    color: var(--text-slate);
    background-color: var(--white);
    overflow-x: hidden;
}

/* Skip Link for Accessibility */
.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: var(--primary-navy);
    color: var(--white);
    padding: 8px;
    text-decoration: none;
    border-radius: 4px;
    z-index: 1000;
    transition: var(--transition-fast);
}

.skip-link:focus {
    top: 6px;
}

/* Container */
.container {
    width: 100%;
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--space-4);
}

@media (min-width: 640px) {
    .container {
        padding: 0 var(--space-6);
    }
}

@media (min-width: 768px) {
    .container {
        padding: 0 var(--space-8);
    }
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 600;
    line-height: 1.2;
    color: var(--primary-navy);
}

/* Section Titles */
.section-title {
    font-size: var(--text-3xl);
    text-align: center;
    margin-bottom: var(--space-12);
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -var(--space-4);
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: var(--accent-red);
    border-radius: 2px;
}

@media (min-width: 768px) {
    .section-title {
        font-size: var(--text-4xl);
        margin-bottom: var(--space-16);
    }
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-light);
    z-index: 100;
    transition: var(--transition-base);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.nav-brand {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: var(--text-xl);
}

.nav-logo {
    color: var(--primary-navy);
    background: linear-gradient(135deg, var(--primary-navy), var(--accent-red));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Navigation Menu */
.nav-menu {
    display: none;
    list-style: none;
    align-items: center;
    gap: var(--space-8);
}

.nav-link {
    color: var(--text-slate);
    text-decoration: none;
    font-weight: 500;
    padding: var(--space-2) 0;
    position: relative;
    transition: var(--transition-fast);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-red);
    transition: var(--transition-base);
}

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

.nav-link:hover,
.nav-link.active {
    color: var(--primary-navy);
}

/* Mobile Navigation Toggle */
.nav-toggle {
    display: flex;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-2);
    z-index: 101;
}

.nav-toggle-icon {
    width: 24px;
    height: 2px;
    background: var(--primary-navy);
    border-radius: 1px;
    transition: var(--transition-base);
}

/* Desktop Navigation */
@media (min-width: 768px) {
    .nav-menu {
        display: flex;
    }
    
    .nav-toggle {
        display: none;
    }
}

/* Mobile Navigation Menu */
@media (max-width: 767px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--white);
        border-bottom: 1px solid var(--border-light);
        flex-direction: column;
        padding: var(--space-4);
        gap: var(--space-4);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition-base);
    }
    
    .nav-menu.active {
        display: flex;
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-toggle.active .nav-toggle-icon:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .nav-toggle.active .nav-toggle-icon:nth-child(2) {
        opacity: 0;
    }
    
    .nav-toggle.active .nav-toggle-icon:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }
}

/* Hero Section */
.hero {
    padding: calc(70px + var(--space-16)) 0 var(--space-16);
    background: 
        linear-gradient(
            135deg, 
            rgba(10, 31, 68, 0.85) 0%, 
            rgba(10, 31, 68, 0.75) 50%,
            rgba(198, 40, 40, 0.7) 100%
        ),
        url('assets/hero-background.jpg');
    background-size: cover;
    background-position: center center;
    background-attachment: fixed;
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-12);
    align-items: center;
}

.hero-title {
    font-size: var(--text-4xl);
    font-weight: 700;
    margin-bottom: var(--space-4);
    color: var(--white);
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
    animation: fadeInUp 0.8s ease-out;
}

.hero-subtitle {
    display: block;
    font-size: var(--text-xl);
    font-weight: 400;
    color: #FFB3BA;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.3);
    margin-top: var(--space-2);
}

.hero-description {
    font-size: var(--text-lg);
    color: rgba(255, 255, 255, 0.9);
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.3);
    margin-bottom: var(--space-8);
    max-width: 600px;
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-4);
    animation: fadeInUp 0.8s ease-out 0.4s both;
}

.hero-image {
    display: flex;
    justify-content: center;
    animation: fadeIn 0.8s ease-out 0.6s both;
}

.headshot {
    width: 280px;
    height: 280px;
    object-fit: cover;
    border-radius: 50%;
    border: 4px solid var(--white);
    box-shadow: 0 20px 40px var(--shadow-medium);
    transition: var(--transition-slow);
}

.headshot:hover {
    transform: scale(1.05);
    box-shadow: 0 25px 50px var(--shadow-medium);
}

/* Mobile-friendly background */
@media (max-width: 767px) {
    .hero {
        background-attachment: scroll;
    }
}

@media (min-width: 768px) {
    .hero-content {
        grid-template-columns: 1fr 300px;
        gap: var(--space-16);
    }
    
    .hero-title {
        font-size: var(--text-5xl);
    }
    
    .hero-subtitle {
        font-size: var(--text-2xl);
    }
    
    .headshot {
        width: 300px;
        height: 300px;
    }
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    font-size: var(--text-base);
    font-weight: 500;
    text-decoration: none;
    border-radius: 8px;
    border: 2px solid transparent;
    cursor: pointer;
    transition: var(--transition-base);
    white-space: nowrap;
}

.btn-primary {
    background: var(--primary-navy);
    color: var(--white);
    border-color: var(--primary-navy);
}

.btn-primary:hover {
    background: transparent;
    color: var(--primary-navy);
    border-color: var(--primary-navy);
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(10, 31, 68, 0.15);
}

.btn-secondary {
    background: transparent;
    color: var(--accent-red);
    border-color: var(--accent-red);
}

.btn-secondary:hover {
    background: var(--accent-red);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(198, 40, 40, 0.15);
}

.btn-icon {
    flex-shrink: 0;
}

/* Experience Section */
.experience {
    padding: var(--space-20) 0;
    background: var(--white);
}

.timeline {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: var(--space-4);
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--border-light);
}

.timeline-item {
    position: relative;
    padding-left: var(--space-12);
    margin-bottom: var(--space-12);
}

.timeline-item:last-child {
    margin-bottom: 0;
}

.timeline-marker {
    position: absolute;
    left: 0;
    top: var(--space-2);
    width: var(--space-4);
    height: var(--space-4);
    background: var(--accent-red);
    border: 3px solid var(--white);
    border-radius: 50%;
    box-shadow: 0 0 0 3px var(--border-light);
}

.timeline-content {
    background: var(--white);
    border: 1px solid var(--border-light);
    border-radius: 12px;
    padding: var(--space-6);
    box-shadow: 0 4px 6px var(--shadow-light);
    transition: var(--transition-base);
}

.timeline-content:hover {
    box-shadow: 0 10px 20px var(--shadow-medium);
    transform: translateY(-2px);
}

.timeline-header {
    margin-bottom: var(--space-4);
}

.timeline-title {
    font-size: var(--text-xl);
    font-weight: 600;
    color: var(--primary-navy);
    margin-bottom: var(--space-2);
}

.timeline-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-4);
    font-size: var(--text-sm);
    color: var(--text-muted);
}

.timeline-company {
    font-weight: 600;
    color: var(--accent-red);
}

.timeline-achievements {
    list-style: none;
    margin-left: 0;
}

.timeline-achievements li {
    position: relative;
    padding-left: var(--space-6);
    margin-bottom: var(--space-3);
    line-height: 1.6;
}

.timeline-achievements li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--accent-red);
    font-weight: bold;
    font-size: var(--text-lg);
}

.timeline-achievements li:last-child {
    margin-bottom: 0;
}

@media (min-width: 768px) {
    .timeline::before {
        left: 50%;
        transform: translateX(-50%);
    }
    
    .timeline-item {
        width: 50%;
        padding: 0 var(--space-8);
        margin-bottom: var(--space-16);
    }
    
    .timeline-item:nth-child(odd) {
        left: 0;
        text-align: right;
    }
    
    .timeline-item:nth-child(even) {
        left: 50%;
        text-align: left;
    }
    
    .timeline-marker {
        left: 50%;
        transform: translateX(-50%);
    }
}

/* Skills Section */
.skills {
    padding: var(--space-20) 0;
    background: var(--background-light);
}

.skills-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-8);
}

.skill-category {
    background: var(--white);
    border-radius: 12px;
    padding: var(--space-6);
    box-shadow: 0 4px 6px var(--shadow-light);
    transition: var(--transition-base);
}

.skill-category:hover {
    box-shadow: 0 10px 20px var(--shadow-medium);
    transform: translateY(-2px);
}

.skill-category-title {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-size: var(--text-xl);
    font-weight: 600;
    color: var(--primary-navy);
    margin-bottom: var(--space-4);
}

.skill-icon {
    color: var(--accent-red);
    flex-shrink: 0;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    list-style: none;
}

.skill-tag {
    background: var(--background-light);
    color: var(--text-slate);
    padding: var(--space-2) var(--space-3);
    border-radius: 20px;
    font-size: var(--text-sm);
    font-weight: 500;
    border: 1px solid var(--border-light);
    transition: var(--transition-fast);
}

.skill-tag:hover {
    background: var(--primary-navy);
    color: var(--white);
    border-color: var(--primary-navy);
    transform: translateY(-1px);
}

@media (min-width: 768px) {
    .skills-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .skills-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-10);
    }
}

/* Projects Section */
.projects {
    padding: var(--space-20) 0;
    background: var(--white);
}

.projects-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-8);
}

.project-card {
    background: var(--white);
    border: 1px solid var(--border-light);
    border-radius: 12px;
    padding: var(--space-6);
    box-shadow: 0 4px 6px var(--shadow-light);
    transition: var(--transition-base);
}

.project-card:hover {
    box-shadow: 0 15px 30px var(--shadow-medium);
    transform: translateY(-4px);
    border-color: var(--accent-red);
}

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--space-4);
    gap: var(--space-4);
}

.project-title {
    font-size: var(--text-xl);
    font-weight: 600;
    color: var(--primary-navy);
    margin-bottom: var(--space-2);
}

.project-meta {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
    text-align: right;
    flex-shrink: 0;
}

.project-role {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--accent-red);
}

.project-year {
    font-size: var(--text-sm);
    color: var(--text-muted);
}

.project-description {
    color: var(--text-slate);
    line-height: 1.6;
    margin-bottom: var(--space-6);
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    list-style: none;
}

.tech-tag {
    background: var(--background-light);
    color: var(--primary-navy);
    padding: var(--space-1) var(--space-3);
    border-radius: 16px;
    font-size: var(--text-xs);
    font-weight: 600;
    border: 1px solid var(--border-light);
}

@media (min-width: 768px) {
    .projects-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .projects-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--space-10);
    }
}

/* Education Section */
.education {
    padding: var(--space-20) 0;
    background: var(--background-light);
}

.education-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-6);
    max-width: 800px;
    margin: 0 auto;
}

.education-item {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    background: var(--white);
    border-radius: 12px;
    padding: var(--space-6);
    box-shadow: 0 4px 6px var(--shadow-light);
    transition: var(--transition-base);
}

.education-item:hover {
    box-shadow: 0 10px 20px var(--shadow-medium);
    transform: translateY(-2px);
}

.education-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary-navy), var(--accent-red));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
}

.education-content {
    flex: 1;
}

.education-title {
    font-size: var(--text-lg);
    font-weight: 600;
    color: var(--primary-navy);
    margin-bottom: var(--space-2);
}

.education-institution {
    font-weight: 600;
    color: var(--accent-red);
    margin-bottom: var(--space-1);
}

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

@media (min-width: 768px) {
    .education-grid {
        grid-template-columns: 1fr;
    }
}

/* Referrals Section */
.referrals {
    padding: var(--space-20) 0;
    background: var(--white);
}

.referrals-content {
    max-width: 900px;
    margin: 0 auto;
}

.referral-item {
    background: var(--background-light);
    border-radius: 16px;
    padding: var(--space-8);
    box-shadow: 0 4px 6px var(--shadow-light);
    transition: var(--transition-base);
    border-left: 4px solid var(--accent-red);
}

.referral-item:hover {
    box-shadow: 0 10px 20px var(--shadow-medium);
    transform: translateY(-2px);
}

.referral-quote {
    margin-bottom: var(--space-6);
}

.referral-quote blockquote {
    font-size: var(--text-lg);
    line-height: 1.7;
    color: var(--text-slate);
    font-style: italic;
    position: relative;
}

.referral-quote blockquote::before {
    content: '"';
    font-size: 4rem;
    color: var(--accent-red);
    position: absolute;
    top: -1rem;
    left: -1rem;
    line-height: 1;
    font-family: Georgia, serif;
}

.referral-quote p {
    margin-bottom: var(--space-4);
}

.referral-quote p:last-child {
    margin-bottom: 0;
}

.referral-author {
    border-top: 1px solid var(--border-light);
    padding-top: var(--space-4);
    text-align: right;
}

.referral-signature {
    font-size: var(--text-xl);
    color: var(--primary-navy);
    margin-bottom: var(--space-2);
}

.referral-title {
    font-size: var(--text-base);
    font-weight: 600;
    color: var(--accent-red);
    margin-bottom: var(--space-1);
}

.referral-organization {
    font-size: var(--text-base);
    font-weight: 500;
    color: var(--text-slate);
    margin-bottom: var(--space-1);
}

.referral-contact {
    font-size: var(--text-sm);
    color: var(--text-muted);
    margin-bottom: var(--space-1);
}

.referral-date {
    font-size: var(--text-sm);
    color: var(--text-muted);
    font-style: italic;
}

@media (min-width: 768px) {
    .referral-item {
        padding: var(--space-10);
    }
    
    .referral-quote blockquote {
        font-size: var(--text-xl);
        padding-left: var(--space-8);
    }
}

/* Contact Section */
.contact {
    padding: var(--space-20) 0;
    background: var(--white);
}

.contact-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.contact-intro {
    font-size: var(--text-lg);
    color: var(--text-muted);
    margin-bottom: var(--space-12);
    line-height: 1.6;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-8);
}

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-6);
    background: var(--background-light);
    border-radius: 12px;
    transition: var(--transition-base);
}

.contact-item:hover {
    background: var(--white);
    box-shadow: 0 4px 12px var(--shadow-light);
    transform: translateY(-2px);
}

.contact-icon {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary-navy), var(--accent-red));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    padding: var(--space-2);
}

.contact-info {
    flex: 1;
    text-align: left;
}

.contact-label {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--text-muted);
    margin-bottom: var(--space-1);
}

.contact-value {
    font-size: var(--text-base);
    color: var(--text-slate);
    font-weight: 500;
}

.contact-link {
    color: var(--primary-navy);
    text-decoration: none;
    transition: var(--transition-fast);
}

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

@media (min-width: 768px) {
    .contact-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Back to Top Button */
.back-to-top {
    position: fixed;
    bottom: var(--space-6);
    right: var(--space-6);
    width: 50px;
    height: 50px;
    background: var(--primary-navy);
    color: var(--white);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px var(--shadow-medium);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition-base);
    z-index: 50;
}

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

.back-to-top:hover {
    background: var(--accent-red);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px var(--shadow-medium);
}

/* Footer */
.footer {
    background: var(--primary-navy);
    color: var(--white);
    padding: var(--space-8) 0;
    text-align: center;
}

.footer p {
    font-size: var(--text-sm);
    opacity: 0.8;
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

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

/* Focus Styles for Accessibility */
*:focus {
    outline: 2px solid var(--accent-red);
    outline-offset: 2px;
}

.btn:focus,
.nav-link:focus,
.contact-link:focus {
    outline-color: var(--accent-red);
    outline-width: 2px;
    outline-style: solid;
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .hero-title,
    .hero-description,
    .hero-actions,
    .hero-image {
        animation: none;
    }
}

/* Print Styles */
@media print {
    .header,
    .nav-toggle,
    .back-to-top,
    .btn {
        display: none !important;
    }
    
    .hero {
        padding-top: var(--space-4);
        min-height: auto;
    }
    
    .section-title::after {
        display: none;
    }
    
    .timeline-content,
    .skill-category,
    .project-card,
    .education-item,
    .contact-item {
        box-shadow: none;
        border: 1px solid var(--border-light);
    }
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
    :root {
        --shadow-light: rgba(0, 0, 0, 0.3);
        --shadow-medium: rgba(0, 0, 0, 0.4);
    }
    
    .nav-link::after {
        height: 3px;
    }
    
    .timeline-marker {
        border-width: 4px;
    }
}