:root {
    /* Color Palette - Modern Editorial (Warm Light) */
    --bg-primary: #F8F9FA;
    --text-primary: #1A1C1E;
    --text-secondary: #4A5568;
    --accent: #5F6F65;
    /* Muted Sage */
    --accent-hover: #4A554E;
    --border: #E2E8F0;
    --glass-border: rgba(255, 255, 255, 0.4);
    --glass-bg: rgba(255, 255, 255, 0.7);
    --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);

    /* Layout */
    --max-width: 1400px;
    --header-height: 100px;
    --grid-gap: 2rem;

    /* Spacing */
    --spacing-xs: 0.75rem;
    --spacing-sm: 1.5rem;
    --spacing-md: 3rem;
    --spacing-lg: 6rem;
    --spacing-xl: 10rem;

    /* Typography */
    --font-serif: 'Playfair Display', serif;
    --font-sans: 'Inter', sans-serif;
    --font-mono: 'JetBrains Mono', 'SF Mono', monospace;

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --radius-img: 32px;

    /* Transitions */
    --transition-smooth: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-sans);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    position: relative;
    overflow-x: hidden;
}

body::before {
    content: "";
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)' opacity='0.04'/%3E%3C/svg%3E");
    pointer-events: none;
    z-index: 9999;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-serif);
    font-weight: 500;
    line-height: 1.1;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

h1 {
    font-size: 5rem;
    letter-spacing: -0.03em;
}

h2 {
    font-size: 2.5rem;
    color: var(--text-primary);
    border-bottom: none;
    margin-bottom: var(--spacing-md);
    position: relative;
    text-align: left;
}

h2::after {
    display: none;
}

h3 {
    font-size: 1.75rem;
}

p {
    margin-bottom: var(--spacing-sm);
    color: var(--text-secondary);
    font-size: 1.125rem;
}

small,
.small-caps {
    font-family: var(--font-sans);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--accent);
}

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

ul {
    list-style: none;
}

/* Utility Classes */
/* Layout & Grid */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    width: 100%;
}

.grid-12 {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: var(--grid-gap);
}

.col-main {
    grid-column: 1 / -1;
}

@media (min-width: 900px) {
    .col-main {
        grid-column: 3 / 11;
    }
}

.section {
    padding: var(--spacing-lg) 0;
    border-bottom: 0.5px solid var(--border);
}

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

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    background-color: rgba(248, 249, 250, 0.8);
    backdrop-filter: blur(12px);
    z-index: 1000;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
}

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

.logo {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.nav-links {
    display: flex;
    gap: var(--spacing-md);
}

.nav-link {
    font-family: var(--font-sans);
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
    transition: color var(--transition-smooth);
}

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

.nav-link::after {
    display: none;
}

/* Hero Section */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding-top: var(--header-height);
    padding-bottom: var(--header-height);
    background: transparent;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
    align-items: center;
    width: 100%;
    max-width: 1000px;
    margin: 0 auto;
}

.hero-text {
    text-align: center;
    order: 2;
}

.hero-image-container {
    display: flex;
    justify-content: center;
    order: 1;
}

.hero-headshot {
    width: 280px;
    height: 280px;
    object-fit: cover;
    border-radius: var(--radius-img);
    box-shadow: 0 20px 40px -5px rgba(0, 0, 0, 0.1);
    filter: grayscale(10%) contrast(1.05);
    transition: transform var(--transition-smooth);
}

.hero-headshot:hover {
    transform: scale(1.02);
}

@media (min-width: 900px) {
    .hero-grid {
        grid-template-columns: 1.5fr 1fr;
        text-align: left;
    }

    .hero-text {
        text-align: left;
        order: 1;
    }

    .hero-image-container {
        justify-content: flex-end;
        order: 2;
    }

    .hero-subtitle {
        margin-left: 0;
        margin-right: 0;
    }

    .hero-contact {
        justify-content: flex-start;
    }
}

.hero-title {
    font-family: var(--font-serif);
    font-size: 5rem;
    color: var(--text-primary);
    background: none;
    -webkit-text-fill-color: initial;
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.03em;
    font-weight: 500;
    line-height: 1;
}

.hero-subtitle {
    font-family: var(--font-sans);
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    max-width: 600px;
    font-weight: 400;
}

.hero-contact {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-sm);
}

.contact-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: transparent;
    padding: 0;
    border-radius: 0;
    color: var(--text-primary);
    font-weight: 500;
    box-shadow: none;
    font-family: var(--font-sans);
    border-bottom: 1px solid transparent;
}

.contact-link i {
    color: var(--text-secondary);
    font-size: 0.9em;
}

.contact-link:hover {
    color: var(--text-primary);
    transform: none;
    box-shadow: none;
    border-bottom-color: var(--text-primary);
}

/* Cards */
.card {
    background: transparent;
    border: none;
    padding: var(--spacing-md);
    transition: all var(--transition-smooth);
    position: relative;
    border-radius: var(--radius-md);
}

.card:hover {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    box-shadow: var(--card-shadow);
    transform: translateY(-2px);
}

.card-title {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.card-subtitle {
    font-family: var(--font-sans);
    font-size: 0.85rem;
    color: var(--accent);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.card-date {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    opacity: 0.8;
    display: block;
}

.card-list {
    list-style: none;
    padding-left: 0;
}

.card-list li {
    position: relative;
    padding-left: 0;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
    font-size: 1rem;
}

.card-list li::before {
    display: none;
}

/* Tech Tags */
.tech-stack {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1rem;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.tech-tag {
    background: none;
    padding: 0;
    color: var(--text-secondary);
    font-weight: 400;
    border: none;
}

.tech-tag:not(:last-child)::after {
    content: "·";
    margin-left: 0.5rem;
    color: var(--border);
}

.tech-tag:hover {
    color: var(--text-primary);
    background: none;
    transform: none;
}

/* Experience Specifics */
.experience-grid {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

/* Footer */
.footer {
    padding: var(--spacing-lg) 0;
    text-align: center;
    border-top: 1px solid var(--border);
    color: var(--text-secondary);
    font-family: var(--font-mono);
    font-size: 0.8rem;
    background: transparent;
}

/* Buttons */
.btn-primary,
.btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.85rem 2rem;
    font-family: var(--font-sans);
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-smooth);
    text-decoration: none;
    letter-spacing: 0.01em;
}

.btn-primary {
    background-color: var(--accent);
    color: #fff;
    border: 2px solid var(--accent);
    box-shadow: 0 2px 8px rgba(95, 111, 101, 0.15);
}

.btn-primary:hover {
    background-color: var(--accent-hover);
    border-color: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(95, 111, 101, 0.25);
}

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

.btn-secondary:hover {
    background-color: var(--accent);
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(95, 111, 101, 0.25);
}

/* Hero CTA */
.hero-cta {
    display: flex;
    gap: 1rem;
    margin-top: var(--spacing-sm);
    flex-wrap: wrap;
}

@media (max-width: 899px) {
    .hero-cta {
        justify-content: center;
    }
}

/* Featured Section */
.featured-section {
    background: #F1F3F5;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    padding: var(--spacing-lg) 0;
}

.featured-section .container {
    max-width: var(--max-width);
}

.featured-card {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    transition: all var(--transition-smooth);
    display: block;
    text-decoration: none;
    max-width: 700px;
}

.featured-card:hover {
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.08);
    transform: translateY(-3px);
}

/* Resume Download */
.resume-download-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg) 0 var(--spacing-md);
    text-align: center;
}

.resume-download-wrapper .btn-primary {
    font-size: 1.1rem;
    padding: 1.1rem 2.8rem;
}

/* Quick Facts Grid */
.quick-facts-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.quick-fact {
    text-align: center;
    padding: var(--spacing-sm);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: var(--glass-bg);
}

.quick-fact-label {
    font-family: var(--font-sans);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--accent);
    margin-bottom: 0.5rem;
    display: block;
}

.quick-fact-value {
    font-family: var(--font-sans);
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-primary);
    line-height: 1.4;
}

@media (max-width: 600px) {
    .quick-facts-grid {
        grid-template-columns: 1fr;
    }
}

/* Scroll Animation */
.fade-in-section {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
    will-change: opacity, transform;
}

.fade-in-section.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ========== HAMBURGER MENU ========== */
.hamburger {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    cursor: pointer;
    padding: 8px;
    z-index: 1002;
    background: none;
    border: none;
}

.hamburger span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all 0.3s ease;
}

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

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

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

/* ========== MOBILE RESPONSIVE ========== */

/* Tablet & below */
@media (max-width: 900px) {
    .container {
        padding-left: 1.5rem;
        padding-right: 1.5rem;
    }

    .hamburger {
        display: flex;
        margin-left: auto;
    }

    .nav-links {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100vh;
        background-color: rgba(248, 249, 250, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: var(--spacing-lg);
        z-index: 1001;
        list-style: none;
        padding: 0;
        margin: 0;
    }

    .nav-links.open {
        display: flex;
    }

    .nav-link {
        font-size: 1.5rem;
    }

    /* Spacing reductions */
    :root {
        --spacing-lg: 3rem;
        --spacing-md: 2rem;
    }

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

/* Mobile phones */
@media (max-width: 600px) {
    :root {
        --spacing-lg: 2.5rem;
        --spacing-md: 1.5rem;
        --header-height: 70px;
    }

    h1 {
        font-size: 2.5rem;
    }

    h2 {
        font-size: 1.75rem;
        margin-bottom: var(--spacing-sm);
    }

    h3 {
        font-size: 1.35rem;
    }

    p {
        font-size: 1rem;
    }

    .hero-title {
        font-size: 3rem;
    }

    .hero-subtitle {
        font-size: 1.05rem;
    }

    .hero-headshot {
        width: 200px;
        height: 200px;
    }

    .hero-cta {
        justify-content: center;
    }

    .btn-primary,
    .btn-secondary {
        padding: 0.75rem 1.5rem;
        font-size: 0.9rem;
    }

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

    .card-title {
        font-size: 1.25rem;
    }

    /* Grid: force single column */
    .grid-2 {
        grid-template-columns: 1fr !important;
    }

    /* Footer */
    .footer .col-main {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }

    /* Detail page headings */
    .col-main h1 {
        font-size: 2rem;
    }

    /* Project content padding */
    .project-content {
        padding: var(--spacing-sm);
    }

    .logo {
        font-size: 1.25rem;
    }
}

/* Resume: Hide PDF iframe on mobile */
@media (max-width: 768px) {

    /* Resume page title + download button stacking */
    .section>div[style*="justify-content: space-between"] {
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
    }
}