:root {
    /* Light mode - Smooth & Violet */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --text-primary: #0f172a;
    --text-secondary: #334155;
    --text-tertiary: #64748b;

    /* Violet Accents - Back by popular demand */
    --accent-primary: #4f46e5;
    /* Indigo 600 */
    --accent-secondary: #818cf8;
    /* Indigo 400 */
    --accent-hover: #4338ca;
    /* Indigo 700 */

    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    /* Neomorphic Shadows */
    --neo-shadow-light: 9px 9px 16px rgba(163, 177, 198, 0.3), -9px -9px 16px rgba(255, 255, 255, 0.8);
    --neo-shadow-dark: 5px 5px 10px rgba(0, 0, 0, 0.3), -5px -5px 10px rgba(255, 255, 255, 0.05);

    --card-bg: #ffffff;
    --nav-bg: #f8fafc;
    /* Matches bg-secondary for Neo effect */
}

@media (prefers-color-scheme: dark) {
    :root {
        /* Dark mode - Midnight Violet */
        --bg-primary: #020617;
        --bg-secondary: #0f172a;
        --bg-tertiary: #1e293b;
        --text-primary: #f8fafc;
        --text-secondary: #cbd5e1;
        --text-tertiary: #94a3b8;

        --accent-primary: #6366f1;
        /* Indigo 500 */
        --accent-secondary: #818cf8;
        --accent-hover: #e0e7ff;

        --border-color: #1e293b;
        --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.5);
        --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.5);
        --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
        --neo-shadow-light: none;
        /* Neo subtle on dark */

        --card-bg: #0f172a;
        --nav-bg: #0f172a;
    }
}

body.light-mode {
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --text-primary: #0f172a;
    --text-secondary: #334155;
    --text-tertiary: #64748b;
    --accent-primary: #4f46e5;
    --accent-secondary: #818cf8;
    --accent-hover: #4338ca;

    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --neo-shadow-light: 6px 6px 12px #cad4e0, -6px -6px 12px #ffffff;

    --card-bg: #ffffff;
    --nav-bg: #f8fafc;
}

body.dark-mode {
    --bg-primary: #020617;
    --bg-secondary: #0f172a;
    --bg-tertiary: #1e293b;
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-tertiary: #94a3b8;
    --accent-primary: #6366f1;
    --accent-secondary: #818cf8;
    --accent-hover: #e0e7ff;

    --border-color: #1e293b;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.5);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
    --neo-shadow-light: 5px 5px 10px rgba(0, 0, 0, 0.5), -5px -5px 10px rgba(255, 255, 255, 0.05);

    --card-bg: #0f172a;
    --nav-bg: #0f172a;
}

/* Marquee Effects */
.marquee {
    overflow: hidden;
    white-space: nowrap;
    position: relative;
    background: var(--bg-tertiary);
    padding: 16px 0;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.marquee-content {
    display: inline-block;
    padding-left: 100%;
    animation: marquee 30s linear infinite;
}

.marquee-content span {
    padding: 0 50px;
    color: var(--text-secondary);
    font-weight: 500;
}

@keyframes marquee {
    0% {
        transform: translate(0, 0);
    }

    100% {
        transform: translate(-100%, 0);
    }
}

/* Skills marquee */
.skills-marquee {
    margin: 40px 0;
    padding: 24px 0;
    background: linear-gradient(90deg, var(--bg-secondary), var(--bg-tertiary), var(--bg-secondary));
    overflow: hidden;
    position: relative;
}

.skills-marquee-content {
    display: flex;
    animation: scroll 20s linear infinite;
}

.skills-marquee-content span {
    padding: 8px 20px;
    margin: 0 12px;
    background: var(--card-bg);
    border-radius: 20px;
    color: var(--text-primary);
    font-weight: 500;
    border: 1px solid var(--border-color);
    white-space: nowrap;
}

@keyframes scroll {
    0% {
        transform: translateX(0);
    }

    100% {
        transform: translateX(-50%);
    }
}

/* Pause marquee on hover */
.marquee:hover .marquee-content,
.skills-marquee:hover .skills-marquee-content {
    animation-play-state: paused;
}

/* Enhanced Animations and Transitions */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fallFromTop {
    from {
        opacity: 0;
        transform: translateY(-100px) rotate(-5deg);
    }

    to {
        opacity: 1;
        transform: translateY(0) rotate(0);
    }
}

@keyframes fallFromRight {
    from {
        opacity: 0;
        transform: translateX(100px) rotate(5deg);
    }

    to {
        opacity: 1;
        transform: translateX(0) rotate(0);
    }
}

@keyframes fallFromBottom {
    from {
        opacity: 0;
        transform: translateY(100px) rotate(5deg);
    }

    to {
        opacity: 1;
        transform: translateY(0) rotate(0);
    }
}

@keyframes fallFromLeft {
    from {
        opacity: 0;
        transform: translateX(-100px) rotate(-5deg);
    }

    to {
        opacity: 1;
        transform: translateX(0) rotate(0);
    }
}

@keyframes smashFromLeft {
    0% {
        opacity: 0;
        transform: translateX(-200px) scale(0.8);
    }

    40% {
        opacity: 1;
        transform: translateX(-20px) scale(1.1);
    }

    50% {
        opacity: 1;
        transform: translateX(0) scale(1.2);
    }

    60% {
        opacity: 1;
        transform: translateX(10px) scale(1.1);
    }

    100% {
        opacity: 1;
        transform: translateX(0) scale(1);
    }
}

@keyframes smashFromRight {
    0% {
        opacity: 0;
        transform: translateX(200px) scale(0.8);
    }

    40% {
        opacity: 1;
        transform: translateX(20px) scale(1.1);
    }

    50% {
        opacity: 1;
        transform: translateX(0) scale(1.2);
    }

    60% {
        opacity: 1;
        transform: translateX(-10px) scale(1.1);
    }

    100% {
        opacity: 1;
        transform: translateX(0) scale(1);
    }
}

@keyframes lightning {

    0%,
    100% {
        opacity: 0;
    }

    10%,
    30%,
    50%,
    70%,
    90% {
        opacity: 1;
    }

    20%,
    40%,
    60%,
    80% {
        opacity: 0.3;
    }
}

@keyframes pulse {

    0%,
    100% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.05);
    }
}

@keyframes shimmer {
    0% {
        background-position: -1000px 0;
    }

    100% {
        background-position: 1000px 0;
    }
}

/* Animated gradient backgrounds */
.animated-gradient {
    background: linear-gradient(270deg, var(--bg-secondary), var(--bg-tertiary), var(--bg-secondary));
    background-size: 600% 600%;
    animation: gradientShift 8s ease infinite;
}

@keyframes gradientShift {
    0% {
        background-position: 0% 50%;
    }

    50% {
        background-position: 100% 50%;
    }

    100% {
        background-position: 0% 50%;
    }
}

/* Enhanced hover effects */
.btn {
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.btn:hover::before {
    left: 100%;
}

/* Card entrance animations */
.card-animate {
    animation: fadeInUp 0.6s ease forwards;
    opacity: 0;
}

.card-animate:nth-child(1) {
    animation-delay: 0.1s;
}

.card-animate:nth-child(2) {
    animation-delay: 0.2s;
}

.card-animate:nth-child(3) {
    animation-delay: 0.3s;
}

.card-animate:nth-child(4) {
    animation-delay: 0.4s;
}

.card-animate:nth-child(5) {
    animation-delay: 0.5s;
}

.card-animate:nth-child(6) {
    animation-delay: 0.6s;
}

.fall-from-top {
    animation: fallFromTop 0.8s ease forwards;
    opacity: 0;
}

.fall-from-right {
    animation: fallFromRight 0.8s ease forwards;
    opacity: 0;
}

.fall-from-bottom {
    animation: fallFromBottom 0.8s ease forwards;
    opacity: 0;
}

.fall-from-left {
    animation: fallFromLeft 0.8s ease forwards;
    opacity: 0;
}

.smash-left {
    animation: smashFromLeft 1.2s ease forwards;
    opacity: 0;
}

.smash-right {
    animation: smashFromRight 1.2s ease forwards;
    opacity: 0;
}

.lightning-effect {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100px;
    height: 100px;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.9) 0%, rgba(255, 255, 255, 0) 70%);
    border-radius: 50%;
    animation: lightning 0.6s ease-in-out;
    pointer-events: none;
    z-index: 10;
}

.metrics-grid {
    position: relative;
}

/* Smooth text transitions */
.hero-title,
.hero-subtitle {
    animation: slideInLeft 0.8s ease forwards;
    opacity: 0;
}

.hero-title {
    font-size: 56px;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 24px;
    color: var(--text-primary);
    text-shadow: none;
    letter-spacing: -0.02em;
    animation-delay: 0.2s;
}

.hero-subtitle {
    font-size: 20px;
    color: var(--text-secondary);
    margin-bottom: 32px;
    animation-delay: 0.4s;
}

/* Enhanced navigation */
.navbar {
    animation: fadeInUp 0.5s ease forwards;
}

/* Logo hover effect */
.logo {
    transition: all 0.3s ease;
    position: relative;
}

.logo:hover {
    transform: scale(1.05);
    text-shadow: 0 0 20px rgba(55, 65, 81, 0.3);
}

/* Enhanced card hover effects */
.metric-card,
.expertise-card,
.use-case-card,
.value-card {
    position: relative;
    overflow: hidden;
}

.metric-card::before,
.expertise-card::before,
.use-case-card::before,
.value-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(55, 65, 81, 0.1), transparent);
    transition: left 0.6s ease;
}

.metric-card:hover::before,
.expertise-card:hover::before,
.use-case-card:hover::before,
.value-card:hover::before {
    left: 100%;
}

/* Smooth scroll behavior */
html {
    scroll-behavior: smooth;
}

/* Loading animations */
.loading {
    animation: pulse 1.5s ease infinite;
}

/* Enhanced transitions for all interactive elements */
a,
button,
.btn,
.theme-toggle {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Focus states with smooth transitions */
a:focus,
button:focus,
.btn:focus,
.theme-toggle:focus {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
    transition: outline 0.2s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.7;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Navigation - Neomorphic */
.navbar {
    position: fixed;
    top: 24px;
    left: 0;
    right: 0;
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    /* Center with margin instead of transform */
    background: var(--nav-bg);
    border-bottom: none;
    z-index: 1000;
    border-radius: 16px;
    padding: 8px 24px;
    box-shadow: var(--neo-shadow-light);
    border: 1px solid rgba(255, 255, 255, 0.4);
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 0;
    width: 100%;
    /* Ensure content takes full width */
    position: relative;
    /* Context for mobile menu absolute positioning */
}

/* Mobile Menu Button - Default Hidden */
.mobile-menu-btn {
    display: none;
    background: transparent;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    padding: 8px;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.mobile-menu-btn:hover {
    background: var(--bg-secondary);
}

.logo {
    font-size: 24px;
    font-weight: 700;
    color: var(--accent-primary);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

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

.btn-resume {
    padding: 8px 16px;
    background: var(--accent-primary);
    color: white !important;
    border-radius: 6px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 6px -1px rgba(79, 70, 229, 0.2);
    border: none;
    text-transform: none;
    letter-spacing: normal;
    font-size: inherit;
}

.btn-resume:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 10px 15px -3px rgba(79, 70, 229, 0.3);
}

.btn-linkedin {
    color: #0077b5;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    opacity: 0.9;
}

.btn-linkedin:hover {
    transform: translateY(-2px);
    opacity: 1;
    filter: drop-shadow(0 4px 3px rgba(0, 119, 181, 0.2));
}

body.dark-mode .btn-linkedin {
    color: #58b6ed;
}

@media (prefers-color-scheme: dark) {
    .btn-linkedin {
        color: #58b6ed;
    }
}

.theme-toggle {
    background: var(--nav-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    /* Use the variable defined in root/dark mode for consistent look */
    box-shadow: var(--neo-shadow-dark);
}

/* Specific adjustment for light mode if needed, but neo-shadow-dark (actually neo-shadow-light var usage) handles switching */
body.light-mode .theme-toggle {
    box-shadow: 3px 3px 6px rgba(163, 177, 198, 0.4), -3px -3px 6px rgba(255, 255, 255, 0.8);
}

body.dark-mode .theme-toggle {
    background: rgba(255, 255, 255, 0.05);
    /* Slight lightening to stand out from nav */
    box-shadow: 2px 2px 5px rgba(0, 0, 0, 0.4);
    border-color: rgba(255, 255, 255, 0.1);
    color: #ffffff;
    /* Ensure icon is bright */
}

.theme-toggle:hover {
    background: var(--accent-primary);
    color: white;
}

.theme-toggle svg {
    width: 20px;
    height: 20px;
}

.sun-icon {
    display: none;
}

.moon-icon {
    display: none;
    stroke: currentColor;
    fill: none;
}

body.light-mode .moon-icon {
    display: block;
    filter: drop-shadow(0 0 1px currentColor);
}

body.light-mode .sun-icon {
    display: none;
}

body.dark-mode .sun-icon {
    display: block;
    filter: drop-shadow(0 0 3px white);
    color: white;
}

body.dark-mode .moon-icon {
    display: none;
}

.system-icon {
    display: none;
}

body:not(.light-mode):not(.dark-mode) .system-icon {
    display: block;
}

body:not(.light-mode):not(.dark-mode) .sun-icon,
body:not(.light-mode):not(.dark-mode) .moon-icon {
    display: none;
}

/* Hero Section */
.hero {
    padding: 140px 0 80px;
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-title {
    font-size: 48px;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 24px;
    color: var(--text-primary);
    letter-spacing: normal;
}

.hero-subtitle {
    font-size: 20px;
    color: var(--text-secondary);
    margin-bottom: 32px;
}

.hero-cta {
    display: flex;
    gap: 16px;
}

.btn {
    display: inline-block;
    padding: 14px 32px;
    font-weight: 600;
    border-radius: 8px;
    text-decoration: none;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.btn-primary {
    background: var(--accent-primary);
    color: white;
    box-shadow: 0 4px 6px -1px rgba(79, 70, 229, 0.2);
    border-radius: 8px;
    text-transform: none;
    letter-spacing: normal;
    padding: 14px 32px;
    font-size: 16px;
}

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 10px 15px -3px rgba(79, 70, 229, 0.4);
}

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

.btn-secondary:hover {
    background: var(--accent-primary);
    color: white;
    box-shadow: 0 4px 6px -1px rgba(79, 70, 229, 0.2);
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.headshot-placeholder {
    position: relative;
    width: 320px;
    height: 320px;
    border-radius: 50%;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    background: var(--bg-secondary);
    border: 4px solid var(--card-bg);
}

.headshot-placeholder img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block !important;
    border-radius: 50%;
}

.headshot-placeholder img.loaded {
    display: block !important;
}

.headshot-fallback {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    color: var(--text-tertiary);
    border-radius: 50%;
    background: var(--bg-tertiary);
}

/* Sections */
.section {
    padding: 80px 0;
}

.section-title {
    font-size: 40px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 48px;
    color: var(--text-primary);
}

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

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

.lead {
    font-size: 24px;
    font-weight: 500;
    margin-bottom: 24px;
    color: var(--text-primary);
}

.about-content p {
    font-size: 18px;
    margin-bottom: 20px;
    color: var(--text-secondary);
}

.summary-box {
    background: var(--card-bg);
    padding: 32px;
    border-radius: 12px;
    border-left: 4px solid var(--accent-primary);
    margin: 32px 0;
    box-shadow: var(--shadow-sm);
}

.summary-box p {
    margin: 0;
}

.about-content h3 {
    font-size: 24px;
    margin: 40px 0 24px;
    color: var(--text-primary);
}

.value-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin: 32px 0;
}

/* Responsive layout for value cards */
@media (max-width: 1024px) {
    .value-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .value-grid {
        grid-template-columns: 1fr;
    }
}

.value-card {
    background: var(--card-bg);
    padding: 32px;
    border-radius: 12px;
    text-align: center;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
}

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

.value-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

.value-card h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.value-card p {
    font-size: 14px;
    color: var(--text-tertiary);
    margin: 0;
}

.approach {
    text-align: center;
    font-size: 18px;
    margin-top: 40px;
    color: var(--text-secondary);
}

/* Metrics Section */
.metrics-section {
    background: var(--bg-primary);
}

.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 24px;
    max-width: 1000px;
    margin: 0 auto;
}

.metric-card {
    background: var(--card-bg);
    padding: 40px 24px;
    border-radius: 12px;
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.metric-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: #14b8a6;
}

.metric-card.highlight {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
}

.metric-value {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.metric-card.highlight .metric-value {
    color: white;
    font-size: 20px;
}

.metric-label {
    font-size: 14px;
    color: var(--text-primary);
    font-weight: 500;
}

.metric-card.highlight .metric-label {
    color: rgba(255, 255, 255, 0.95);
}

.achievement-card {
    background: var(--card-bg);
    padding: 32px;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
    border: 2px solid transparent;
    grid-column: span 2;
}

.achievement-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: #14b8a6;
}

.achievement-header {
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--border-color);
}

.achievement-header h3 {
    font-size: 24px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.achievement-body p {
    color: var(--text-primary);
    line-height: 1.6;
    margin: 0;
}

/* Responsive for achievement card */
@media (max-width: 768px) {
    .achievement-card {
        grid-column: span 1;
    }
}

/* Expertise Section */
.expertise-section {
    background: var(--bg-secondary);
}

.expertise-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
}

/* Responsive layout for expertise cards */
@media (max-width: 768px) {
    .expertise-grid {
        grid-template-columns: 1fr;
    }
}

.expertise-card {
    background: var(--card-bg);
    padding: 32px;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

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

.expertise-card h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.expertise-card ul {
    list-style: none;
}

.expertise-card li {
    padding: 8px 0;
    padding-left: 24px;
    position: relative;
    color: var(--text-primary);
}

.expertise-card li:before {
    content: "→";
    position: absolute;
    left: 0;
    color: var(--text-primary);
    font-weight: 600;
}

/* Use Cases */
.use-cases-section {
    background: var(--bg-primary);
}

.use-cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 32px;
}

.use-case-card {
    background: var(--card-bg);
    padding: 32px;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
    border-left: 4px solid #14b8a6;
}

.use-case-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.use-case-icon {
    font-size: 32px;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.use-case-card h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.use-case-card p {
    color: var(--text-primary);
    line-height: 1.6;
}

/* Value Prop Section */
.value-section {
    background: var(--bg-secondary);
}

.value-prop-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 48px;
    max-width: 900px;
    margin: 0 auto;
}

.value-prop-column h2 {
    font-size: 28px;
    margin-bottom: 24px;
    color: var(--text-primary);
}

.value-list {
    list-style: none;
}

.value-list li {
    padding: 12px 0;
    padding-left: 32px;
    position: relative;
    color: var(--text-secondary);
    font-size: 16px;
}

.value-list li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--accent-primary);
    font-weight: 700;
    font-size: 20px;
}

/* Contact Section */
.contact-section {
    background: var(--bg-primary);
}

.contact-content {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
}

.contact-intro {
    font-size: 20px;
    margin-bottom: 16px;
    color: var(--text-secondary);
}

.contact-list {
    list-style: none;
    margin: 24px 0;
    text-align: left;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

.contact-list li {
    padding: 12px 0;
    padding-left: 32px;
    position: relative;
    color: var(--text-secondary);
    font-size: 18px;
}

.contact-list li:before {
    content: "→";
    position: absolute;
    left: 0;
    color: var(--accent-primary);
    font-weight: 700;
}

.contact-cta {
    font-size: 20px;
    margin: 32px 0;
    color: var(--text-primary);
    font-weight: 500;
}

.contact-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin-top: 32px;
}

/* Footer */
.footer {
    background: var(--bg-secondary);
    padding: 32px 0;
    text-align: center;
    border-top: 1px solid var(--border-color);
}

.footer p {
    color: var(--text-tertiary);
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-links {
        gap: 16px;
        font-size: 14px;
        /* Mobile Menu Base State */
        display: none;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--nav-bg);
        padding: 24px;
        border-radius: 12px;
        box-shadow: var(--shadow-lg);
        margin-top: 12px;
        backdrop-filter: blur(10px);
        border: 1px solid rgba(255, 255, 255, 0.1);
        text-align: center;
    }

    .nav-links.active {
        display: flex;
        animation: slideDown 0.3s ease forwards;
    }

    @keyframes slideDown {
        from {
            opacity: 0;
            transform: translateY(-10px);
        }

        to {
            opacity: 1;
            transform: translateY(0);
        }
    }

    /* Show links inside active menu */
    .nav-links.active a {
        display: block;
        padding: 12px;
        width: 100%;
    }

    /* Mobile Menu Button Visible */
    .mobile-menu-btn {
        display: flex;
        align-items: center;
        justify-content: center;
    }

    /* Old hiding logic replaced by above toggle logic */
    /* .nav-links a:not(.btn-resume):not(.theme-toggle) {
        display: none;
    } */

    .hero-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .hero-title {
        font-size: 32px;
    }

    .hero-subtitle {
        font-size: 18px;
    }

    .headshot-placeholder {
        width: 240px;
        height: 240px;
    }

    .section-title {
        font-size: 32px;
    }

    .metrics-grid {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    }

    .expertise-grid,
    .use-cases-grid {
        grid-template-columns: 1fr;
    }

    .value-prop-grid {
        grid-template-columns: 1fr;
    }

    .contact-buttons {
        flex-direction: column;
        width: 100%;
    }

    .contact-buttons .btn {
        width: 100%;
        display: flex;
        justify-content: center;
        align-items: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .hero {
        padding: 100px 0 60px;
    }

    .section {
        padding: 60px 0;
    }

    .btn {
        padding: 12px 24px;
        font-size: 14px;
    }
}