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

:root {
    --color-bg: #000000;
    --color-text: #FFFFFF;
    --color-text-secondary: #A0A0A0;
    --color-accent: #5B7C99;
    --color-border: #2A2A2A;
    --spacing-xs: 0.375rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4.5rem;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', sans-serif;
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.6;
    font-size: 16px;
}

/* Typography */
h1 {
    font-size: clamp(1.75rem, 5vw, 3.5rem);
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.02em;
}

h2 {
    font-size: clamp(1.5rem, 3vw, 2.25rem);
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.01em;
}

h3 {
    font-size: clamp(1.125rem, 2vw, 1.25rem);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

p {
    font-size: clamp(1rem, 1.5vw, 1.125rem);
    line-height: 1.7;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
}

a {
    color: var(--color-text);
    text-decoration: none;
    transition: color 0.2s ease;
}

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

/* Navigation */
nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-weight: 600;
    font-size: 1.125rem;
    z-index: 1001;
    display: flex;
    align-items: center;
}

.nav-logo img {
    height: 40px;
    width: auto;
    transition: opacity 0.2s ease;
}

.nav-logo:hover img {
    opacity: 0.8;
}


.nav-links {
    display: flex;
    gap: var(--spacing-md);
    list-style: none;
}

.nav-links a {
    font-size: 0.9375rem;
    font-weight: 500;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--color-accent);
    transition: width 0.2s ease;
}

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

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
    z-index: 1001;
}

.mobile-menu-toggle span {
    display: block;
    width: 25px;
    height: 2px;
    background: var(--color-text);
    transition: all 0.3s ease;
}

.mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(7px, 7px);
}

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

.mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.container-narrow {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

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

.hero {
    min-height: 90vh;
    display: flex;
    align-items: center;
    padding-top: calc(var(--spacing-xl) + 80px);
}

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

/* Hero Layout with Background Photo */
.hero-layout {
    position: relative;
    display: flex;
    align-items: center;
    min-height: 70vh;
}

.hero-layout::before {
    content: '';
    position: absolute;
    right: -100px;
    top: 50%;
    transform: translateY(-50%);
    width: 500px;
    height: 500px;
    background-image: url('erik-unger-transparent.png');
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
    opacity: 0.15;
    z-index: -1;
    pointer-events: none;
}

.hero-layout .hero-content {
    position: relative;
    z-index: 1;
    max-width: 700px;
}


.subheadline {
    font-size: clamp(1.125rem, 2vw, 1.25rem);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}

/* About Hero with Photo */
.about-hero {
    display: flex;
    gap: var(--spacing-lg);
    align-items: center;
    flex-wrap: wrap;
}

.about-photo {
    flex: 0 0 250px;
}

.profile-image {
    width: 100%;
    max-width: 250px;
    height: auto;
    border-radius: 12px;
    border: 2px solid var(--color-border);
    transition: transform 0.3s ease, border-color 0.3s ease;
}

.profile-image:hover {
    transform: scale(1.02);
    border-color: var(--color-accent);
}

.about-intro {
    flex: 1;
    min-width: 300px;
}

.about-intro h1 {
    margin-bottom: var(--spacing-sm);
}

.about-intro .subheadline {
    margin-bottom: var(--spacing-md);
    font-size: 1.125rem;
    font-weight: 500;
}

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

/* Buttons / CTAs */
.cta-group {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.875rem 1.75rem;
    font-size: 1rem;
    font-weight: 500;
    border-radius: 6px;
    transition: all 0.2s ease;
    cursor: pointer;
    border: none;
    white-space: nowrap;
}

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

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

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

.btn-secondary:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

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

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

.text-link {
    display: inline-flex;
    align-items: center;
    font-weight: 500;
    gap: 0.5rem;
}

.text-link::after {
    content: '→';
    transition: transform 0.2s ease;
}

.text-link:hover::after {
    transform: translateX(4px);
}

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

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.stat-item {
    text-align: center;
    padding: var(--spacing-md);
}

.stat-number {
    font-size: clamp(2rem, 4vw, 2.5rem);
    font-weight: 600;
    color: var(--color-accent);
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
}

/* Cards */
.card {
    padding: var(--spacing-md);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    transition: all 0.2s ease;
}

.card:hover {
    border-color: var(--color-accent);
    transform: translateY(-2px);
}

.card-title {
    font-size: clamp(1.125rem, 2vw, 1.25rem);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.card-description {
    color: var(--color-text-secondary);
    font-size: clamp(0.9375rem, 1.5vw, 1rem);
    margin-bottom: var(--spacing-sm);
}

/* Highlight Box */
.highlight-box {
    background: rgba(91, 124, 153, 0.1);
    border: 1px solid var(--color-accent);
    border-radius: 8px;
    padding: var(--spacing-lg);
    margin: var(--spacing-lg) 0;
}

.highlight-box h3 {
    color: var(--color-accent);
}

/* Skills */
.skills-category {
    margin-bottom: var(--spacing-md);
}

.skills-category h3 {
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
}

.skills-category p {
    margin-bottom: var(--spacing-sm);
}

/* Principles List */
.principles-list {
    list-style: none;
    margin-top: var(--spacing-md);
}

.principles-list li {
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--color-border);
    font-size: clamp(1rem, 1.5vw, 1.125rem);
}

.principles-list li:last-child {
    border-bottom: none;
}

/* Timeline / Milestones */
.milestone {
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid var(--color-border);
    position: relative;
}

.milestone:last-child {
    border-bottom: none;
}

/* Featured Milestone Styling */
.milestone-featured {
    background: rgba(91, 124, 153, 0.08);
    border: 1px solid var(--color-accent);
    border-radius: 8px;
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    transition: all 0.3s ease;
}

.milestone-featured:hover {
    background: rgba(91, 124, 153, 0.12);
    transform: translateX(4px);
}

.featured-badge {
    display: inline-block;
    background: var(--color-accent);
    color: var(--color-bg);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
    margin-bottom: var(--spacing-xs);
}

.milestone-year {
    font-weight: 600;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-accent);
    margin-bottom: var(--spacing-xs);
}

.milestone-title {
    font-size: clamp(1.125rem, 2vw, 1.25rem);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text);
}

.milestone-featured .milestone-title {
    color: var(--color-text);
}

.milestone-description {
    color: var(--color-text-secondary);
    font-size: clamp(0.9375rem, 1.5vw, 1rem);
}

.milestone-featured .milestone-description {
    color: var(--color-text-secondary);
}

/* Contact */
.contact-options {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
}

.contact-item {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    padding: var(--spacing-md);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    transition: all 0.2s ease;
    text-decoration: none;
    color: var(--color-text);
}

.contact-item:hover {
    border-color: var(--color-accent);
    transform: translateX(4px);
}

.contact-label {
    font-weight: 600;
    margin-right: var(--spacing-sm);
    min-width: 100px;
}

.contact-value {
    color: var(--color-text);
}

/* Social Icons */
.social-links {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
    flex-wrap: wrap;
}

.social-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border: 1px solid var(--color-border);
    border-radius: 50%;
    transition: all 0.2s ease;
}

.social-link:hover {
    border-color: var(--color-accent);
    transform: translateY(-2px);
}

/* Footer */
footer {
    border-top: 1px solid var(--color-border);
    padding: var(--spacing-xl) 0 var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
}

.footer-section h3 {
    margin-bottom: var(--spacing-md);
    font-size: 1rem;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: var(--spacing-sm);
}

.footer-links a {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
}

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

.footer-bottom {
    text-align: center;
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
    color: var(--color-text-secondary);
    font-size: 0.875rem;
}

/* Project Detail */
.project-hero {
    padding-top: calc(var(--spacing-xl) + 80px);
    padding-bottom: var(--spacing-lg);
}

.project-section {
    padding: var(--spacing-lg) 0;
    border-top: 1px solid var(--color-border);
}

.project-section:first-of-type {
    border-top: none;
}

/* Utilities */
.mt-lg {
    margin-top: var(--spacing-lg);
}

.mb-lg {
    margin-bottom: var(--spacing-lg);
}

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

/* Responsive Design */

/* Tablet: 768px - 1024px */
@media (max-width: 1024px) {
    .container {
        padding: 0 var(--spacing-md);
    }

    .grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .about-hero {
        flex-direction: column;
        text-align: center;
    }

    .about-photo {
        flex: 0 0 auto;
    }

    .profile-image {
        max-width: 200px;
    }
}

/* Mobile: 320px - 768px */
@media (max-width: 768px) {
    :root {
        --spacing-xl: 3rem;
        --spacing-lg: 2rem;
    }

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

    .mobile-menu-toggle {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 70%;
        max-width: 300px;
        height: 100vh;
        background: rgba(0, 0, 0, 0.98);
        flex-direction: column;
        padding: 80px var(--spacing-md) var(--spacing-md);
        gap: var(--spacing-md);
        transition: right 0.3s ease;
        border-left: 1px solid var(--color-border);
    }

    .nav-links.active {
        right: 0;
    }

    .nav-links a {
        font-size: 1.125rem;
        padding: var(--spacing-sm) 0;
    }

    .nav-links a::after {
        display: none;
    }

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

    .hero {
        min-height: 85vh;
        padding-top: calc(var(--spacing-lg) + 70px);
    }

    .hero-layout::before {
        width: 300px;
        height: 300px;
        right: -50px;
        opacity: 0.1;
    }


    .about-hero {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-md);
    }

    .about-photo {
        flex: 0 0 auto;
        width: 100%;
        display: flex;
        justify-content: center;
    }

    .profile-image {
        max-width: 180px;
    }

    .about-intro {
        min-width: auto;
    }

    .cta-group {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .btn {
        width: 100%;
        padding: 1rem 1.5rem;
    }

    .grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }

    .stats-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }

    .stat-item {
        padding: var(--spacing-sm);
    }

    .highlight-box {
        padding: var(--spacing-md);
    }

    .milestone-featured {
        padding: var(--spacing-sm);
    }

    .milestone-featured:hover {
        transform: none;
    }

    .featured-badge {
        font-size: 0.7rem;
        padding: 0.2rem 0.6rem;
    }

    .contact-label {
        min-width: auto;
        width: 100%;
        margin-bottom: var(--spacing-xs);
    }

    .contact-item {
        flex-direction: column;
        align-items: flex-start;
    }

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

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

/* Small Mobile: < 480px */
@media (max-width: 480px) {
    .nav-links {
        width: 80%;
    }

    h1 {
        font-size: 1.75rem;
    }

    .stat-number {
        font-size: 1.75rem;
    }

    .btn {
        font-size: 0.9375rem;
        padding: 0.875rem 1.25rem;
    }

    .profile-image {
        max-width: 150px;
    }
}

/* Large Desktop: > 1440px */
@media (min-width: 1440px) {
    .container {
        max-width: 1400px;
    }

    .grid {
        grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    }
}