/* ===================================
   CSS Variables & Theme Configuration
   =================================== */
:root {
    /* Colors - Light Theme */
    --color-primary: #0066cc;
    --color-primary-dark: #0052a3;
    --color-primary-light: #e6f0ff;
    --color-accent: #00a86b;
    --color-accent-light: #e6f7f1;
    
    --color-bg: #ffffff;
    --color-bg-alt: #f8f9fc;
    --color-bg-card: #ffffff;
    --color-bg-elevated: #ffffff;
    
    --color-text: #1a1a2e;
    --color-text-muted: #64748b;
    --color-text-light: #94a3b8;
    
    --color-border: #e2e8f0;
    --color-border-light: #f1f5f9;
    
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-error: #ef4444;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --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);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* Typography */
    --font-sans: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'Cascadia Code', 'Fira Code', 'Consolas', monospace;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
    
    /* Layout */
    --header-height: 4rem;
    --container-max: 1200px;
    --container-padding: 1.5rem;
}

/* Dark Theme */
[data-theme="dark"] {
    --color-primary: #60a5fa;
    --color-primary-dark: #3b82f6;
    --color-primary-light: #1e3a5f;
    --color-accent: #34d399;
    --color-accent-light: #064e3b;
    
    --color-bg: #0f172a;
    --color-bg-alt: #1e293b;
    --color-bg-card: #1e293b;
    --color-bg-elevated: #334155;
    
    --color-text: #f1f5f9;
    --color-text-muted: #94a3b8;
    --color-text-light: #64748b;
    
    --color-border: #334155;
    --color-border-light: #475569;
    
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.4), 0 10px 10px -5px rgba(0, 0, 0, 0.3);
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--header-height);
}

body {
    font-family: var(--font-sans);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    transition: background-color var(--transition-base), color var(--transition-base);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

a:hover {
    color: var(--color-primary-dark);
}

ul {
    list-style: none;
}

button {
    font-family: inherit;
    font-size: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

/* Focus styles for accessibility */
:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* Skip link for accessibility */
.skip-link {
    position: absolute;
    top: -100%;
    left: 50%;
    transform: translateX(-50%);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-primary);
    color: white;
    border-radius: var(--radius-md);
    z-index: 9999;
    transition: top var(--transition-fast);
}

.skip-link:focus {
    top: var(--spacing-md);
}

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

.section {
    padding: var(--spacing-3xl) 0;
}

.section__title {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

.section__subtitle {
    font-size: 1.1rem;
    color: var(--color-text-muted);
    text-align: center;
    margin-bottom: var(--spacing-2xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.text-highlight {
    color: var(--color-primary);
}

/* ===================================
   Header & Navigation
   =================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
    transition: background-color var(--transition-base), box-shadow var(--transition-base);
}

.header.scrolled {
    box-shadow: var(--shadow-md);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.nav__logo {
    display: flex;
    align-items: center;
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--color-text);
}

.logo-text {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    color: white;
    border-radius: var(--radius-md);
    font-weight: 700;
}

.nav__menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
}

.nav__list {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.nav__link {
    position: relative;
    color: var(--color-text-muted);
    font-weight: 500;
    padding: var(--spacing-sm) 0;
    transition: color var(--transition-fast);
}

.nav__link:hover,
.nav__link.active {
    color: var(--color-primary);
}

.nav__link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: width var(--transition-fast);
}

.nav__link:hover::after,
.nav__link.active::after {
    width: 100%;
}

.nav__toggle,
.nav__close {
    display: none;
    padding: var(--spacing-sm);
    color: var(--color-text);
}

.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    border-radius: var(--radius-full);
    background: var(--color-bg-alt);
    color: var(--color-text);
    transition: background-color var(--transition-fast), transform var(--transition-fast);
}

.theme-toggle:hover {
    background: var(--color-border);
    transform: rotate(15deg);
}

.sun-icon {
    display: block;
}

.moon-icon {
    display: none;
}

[data-theme="dark"] .sun-icon {
    display: none;
}

[data-theme="dark"] .moon-icon {
    display: block;
}

/* Mobile Navigation */
@media (max-width: 768px) {
    .nav__toggle {
        display: flex;
    }
    
    .nav__menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: min(300px, 80%);
        height: 100vh;
        background: var(--color-bg);
        flex-direction: column;
        justify-content: flex-start;
        padding: var(--spacing-3xl) var(--spacing-xl);
        gap: var(--spacing-2xl);
        box-shadow: var(--shadow-xl);
        transition: right var(--transition-base);
        z-index: 1001;
    }
    
    .nav__menu.show {
        right: 0;
    }
    
    .nav__list {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-lg);
    }
    
    .nav__link {
        font-size: 1.1rem;
    }
    
    .nav__close {
        display: flex;
        position: absolute;
        top: var(--spacing-md);
        right: var(--spacing-md);
    }
}

/* ===================================
   Hero Section
   =================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: calc(var(--header-height) + var(--spacing-2xl));
    background: linear-gradient(135deg, var(--color-bg) 0%, var(--color-bg-alt) 100%);
}

.hero__container {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
    align-items: center;
}

@media (min-width: 900px) {
    .hero__container {
        grid-template-columns: 1.2fr 0.8fr;
    }
}

.hero__content {
    text-align: center;
}

@media (min-width: 900px) {
    .hero__content {
        text-align: left;
    }
}

.hero__subtitle {
    display: inline-block;
    font-size: 1rem;
    color: var(--color-primary);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-sm);
}

.hero__title {
    font-size: clamp(2rem, 6vw, 3.5rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--spacing-sm);
    background: linear-gradient(135deg, var(--color-text) 0%, var(--color-primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero__role {
    font-size: clamp(1.25rem, 3vw, 1.75rem);
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
}

.hero__tagline {
    font-size: 1rem;
    color: var(--color-accent);
    font-weight: 500;
    margin-bottom: var(--spacing-md);
}

.hero__location {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--spacing-sm) var(--spacing-lg);
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-lg);
    justify-content: center;
}

@media (min-width: 900px) {
    .hero__location {
        justify-content: flex-start;
    }
}

.hero__experience-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    color: white;
    padding: 0.35rem 0.85rem;
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 0.85rem;
}

.hero__summary {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    max-width: 650px;
    margin-bottom: var(--spacing-xl);
}

.hero__summary-block {
    background: var(--color-bg-alt);
    border-left: 4px solid var(--color-primary);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.hero__summary-block:nth-child(2) {
    border-left-color: var(--color-accent);
}

.hero__summary-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.hero__summary-block:nth-child(2) .hero__summary-title {
    color: var(--color-accent);
}

.hero__summary-block p {
    font-size: 0.95rem;
    color: var(--color-text-muted);
    line-height: 1.7;
    margin: 0;
}

.hero__summary-block strong {
    color: var(--color-text);
    font-weight: 600;
}

@media (min-width: 900px) {
    .hero__summary {
        margin-left: 0;
        margin-right: auto;
    }
}

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

@media (min-width: 900px) {
    .hero__actions {
        justify-content: flex-start;
    }
}

.hero__social {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
}

@media (min-width: 900px) {
    .hero__social {
        justify-content: flex-start;
    }
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.75rem;
    height: 2.75rem;
    border-radius: var(--radius-full);
    background: var(--color-bg-alt);
    color: var(--color-text-muted);
    transition: background-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
}

.social-link:hover {
    background: var(--color-primary);
    color: white;
    transform: translateY(-3px);
}

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

.hero__shield {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero__profile {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.profile-photo {
    width: clamp(200px, 25vw, 280px);
    height: clamp(200px, 25vw, 280px);
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid var(--color-primary);
    box-shadow: 0 10px 40px rgba(0, 123, 255, 0.3);
    animation: float 6s ease-in-out infinite;
}

.shield-icon {
    width: clamp(150px, 20vw, 200px);
    height: clamp(150px, 20vw, 200px);
    stroke: var(--color-primary);
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-15px); }
}

/* ===================================
   Buttons
   =================================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 0.75rem 1.5rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.btn--primary {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: white;
    box-shadow: var(--shadow-md);
}

.btn--primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    color: white;
}

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

.btn--outline:hover {
    background: var(--color-primary);
    color: white;
}

.btn--small {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

/* Privacy reveal buttons */
.contact__protected {
    margin-top: 0.25rem;
}

.contact__reveal-btn {
    background: transparent;
    color: var(--color-primary);
    border: 1.5px solid var(--color-border);
    padding: 0.4rem 0.9rem;
    border-radius: var(--radius-full);
    font-weight: 500;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
}

.contact__reveal-btn:hover {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
    transform: translateY(-1px);
}

.contact__reveal-btn svg {
    opacity: 0.8;
}

.contact__revealed {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.contact__revealed a {
    color: var(--color-text);
    font-size: 0.95rem;
}

.contact__copy-btn {
    background: var(--color-bg-alt);
    color: var(--color-primary);
    border: 1px solid var(--color-border);
    padding: 0.3rem 0.6rem;
    border-radius: var(--radius-md);
    font-weight: 500;
    font-size: 0.75rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
}

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

#phone-link {
    color: var(--color-text);
    font-size: 0.95rem;
}

.icon {
    flex-shrink: 0;
}

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

.about__content {
    max-width: 800px;
    margin: 0 auto;
}

.about__intro {
    font-size: 1.15rem;
    line-height: 1.8;
    color: var(--color-text);
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

/* Vertical Timeline */
.about__timeline {
    position: relative;
    padding-left: var(--spacing-3xl);
}

.about__timeline::before {
    content: '';
    position: absolute;
    left: 1rem;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--color-primary), var(--color-primary-light));
}

.about__timeline-item {
    position: relative;
    padding-bottom: var(--spacing-2xl);
}

.about__timeline-item:last-child {
    padding-bottom: 0;
}

.about__timeline-num {
    position: absolute;
    left: calc(-1 * var(--spacing-3xl) + 0.05rem);
    top: 0;
    width: 2rem;
    height: 2rem;
    background: var(--color-primary);
    color: white;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 700;
    box-shadow: 0 0 0 4px var(--color-bg-alt);
    z-index: 1;
}

.about__timeline-content {
    background: var(--color-bg);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    transition: all var(--transition-fast);
}

.about__timeline-content:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md);
    transform: translateX(4px);
}

.about__timeline-content h3 {
    font-size: 1.15rem;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
}

.about__timeline-content p {
    color: var(--color-text-muted);
    line-height: 1.7;
    font-size: 0.95rem;
    margin: 0;
}

/* Responsive: Stack on mobile */
@media (max-width: 576px) {
    .about__timeline {
        padding-left: var(--spacing-2xl);
    }
    
    .about__timeline::before {
        left: 0.75rem;
    }
    
    .about__timeline-num {
        left: calc(-1 * var(--spacing-2xl) + 0.25rem);
        width: 1.5rem;
        height: 1.5rem;
        font-size: 0.65rem;
    }
    
    .about__timeline-content {
        padding: var(--spacing-md);
    }
    
    .about__intro {
        font-size: 1rem;
        text-align: left;
    }
}

/* ===================================
   Highlights / At a Glance Section
   UX Decision: Quick scan section for HR/Recruiters (30-60 seconds)
   Shows key impact metrics without requiring deep-dive
   =================================== */
.highlights {
    background: var(--color-bg);
}

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

.highlight-card {
    background: var(--color-bg-card);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--color-border);
    text-align: center;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
}

.highlight-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary);
}

.highlight-card__icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 4rem;
    height: 4rem;
    margin: 0 auto var(--spacing-md);
    border-radius: var(--radius-xl);
}

.highlight-card__icon--security {
    background: rgba(16, 185, 129, 0.1);
    color: #10b981;
}

.highlight-card__icon--risk {
    background: rgba(239, 68, 68, 0.1);
    color: #ef4444;
}

.highlight-card__icon--ops {
    background: rgba(99, 102, 241, 0.1);
    color: #6366f1;
}

.highlight-card__icon--cloud {
    background: rgba(59, 130, 246, 0.1);
    color: #3b82f6;
}

.highlight-card__icon--compliance {
    background: rgba(245, 158, 11, 0.1);
    color: #f59e0b;
}

.highlight-card__title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
}

.highlight-card__metrics {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

.highlight-metric {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.highlight-metric__value {
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--color-primary);
    line-height: 1.1;
}

.highlight-metric__label {
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-muted);
    margin-top: 0.25rem;
}

.highlight-card__description {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    line-height: 1.6;
    margin: 0;
}

/* ===================================
   Projects Section
   =================================== */
.projects__filters {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-2xl);
}

.filter-btn {
    padding: 0.5rem 1.25rem;
    border-radius: var(--radius-full);
    font-weight: 500;
    color: var(--color-text-muted);
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    transition: all var(--transition-fast);
}

.filter-btn:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

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

/* Projects Category Section Headers */
.projects__category {
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
}

.projects__category:first-of-type {
    margin-top: var(--spacing-lg);
}

.projects__category-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--color-primary);
}

.projects__category-title svg {
    color: var(--color-primary);
    flex-shrink: 0;
}

.projects__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: var(--spacing-lg);
}

.project-card {
    background: var(--color-bg-card);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--color-border);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast), opacity var(--transition-base);
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.project-card.hidden {
    display: none;
}

.project-card__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-md);
}

.project-card__icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 3rem;
    height: 3rem;
    background: var(--color-primary-light);
    border-radius: var(--radius-lg);
    color: var(--color-primary);
}

/* Domain Badges - UX: Quickly identify project category (SOC, DFIR, Cloud, GRC, VM, Automation) */
.project-card__badges {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
}

.project-card__domain {
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0.25rem 0.6rem;
    border-radius: var(--radius-full);
    background: var(--color-accent-light);
    color: var(--color-accent);
    border: 1px solid var(--color-accent);
}

.project-card__category {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0.25rem 0.75rem;
    background: var(--color-accent-light);
    color: var(--color-accent);
    border-radius: var(--radius-full);
}

/* Impact Metrics Badges - UX: Key numbers visible at a glance for quick scanning */
.project-card__metrics {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.metric-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    font-size: 0.75rem;
    padding: 0.35rem 0.7rem;
    background: var(--color-primary-light);
    color: var(--color-primary);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-primary);
}

.metric-badge strong {
    font-weight: 700;
    color: var(--color-primary-dark);
}

[data-theme="dark"] .metric-badge {
    background: rgba(96, 165, 250, 0.15);
    border-color: var(--color-primary);
}

[data-theme="dark"] .metric-badge strong {
    color: var(--color-primary);
}

.project-card__title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
}

.project-card__summary {
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

.project-card__toggle {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--color-primary);
    font-weight: 600;
    padding: var(--spacing-sm) 0;
    transition: gap var(--transition-fast);
}

.project-card__toggle:hover {
    gap: var(--spacing-md);
}

.project-card__toggle svg {
    transition: transform var(--transition-fast);
}

.project-card__toggle[aria-expanded="true"] svg {
    transform: rotate(180deg);
}

.project-card__details {
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
    animation: slideDown var(--transition-base);
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.project-card__details h4 {
    font-size: 0.875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.project-card__details h4:first-child {
    margin-top: 0;
}

.project-card__details p {
    color: var(--color-text-muted);
    line-height: 1.6;
}

.project-card__details ul {
    padding-left: var(--spacing-lg);
    list-style: disc;
    color: var(--color-text-muted);
}

.project-card__details li {
    margin-bottom: var(--spacing-xs);
}

.project-card__tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
}

.tag {
    font-size: 0.75rem;
    font-weight: 500;
    padding: 0.25rem 0.75rem;
    background: var(--color-bg-alt);
    color: var(--color-text-muted);
    border-radius: var(--radius-full);
    border: 1px solid var(--color-border);
}

/* ===================================
   Experience Timeline
   UX Decision: Progressive disclosure pattern - summary visible, technical details expandable
   HR gets quick scan (30-60 sec), hiring managers can deep-dive
   =================================== */
.experience {
    background: var(--color-bg-alt);
}

.timeline {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
    padding-left: var(--spacing-xl);
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(to bottom, var(--color-primary), var(--color-accent));
    border-radius: var(--radius-full);
}

.timeline__item {
    position: relative;
    padding-bottom: var(--spacing-2xl);
}

.timeline__item:last-child {
    padding-bottom: 0;
}

.timeline__marker {
    position: absolute;
    left: calc(-1 * var(--spacing-xl) - 7px);
    top: 0;
    width: 16px;
    height: 16px;
    background: var(--color-primary);
    border: 3px solid var(--color-bg-alt);
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-md);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.timeline__item:hover .timeline__marker {
    transform: scale(1.2);
    box-shadow: 0 0 0 4px var(--color-primary-light);
}

.timeline__content {
    background: var(--color-bg-card);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--color-border);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.timeline__content:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-lg);
}

.timeline__header {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.timeline__date {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-primary);
}

.timeline__company {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--color-text);
    letter-spacing: 0.01em;
}

.timeline__title {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
}

.timeline__subtitle {
    font-size: 0.95rem;
    color: var(--color-accent);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

/* Ownership & Leadership Badges - UX: Quickly shows scope and responsibility level */
.timeline__ownership {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.ownership-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0.3rem 0.7rem;
    border-radius: var(--radius-full);
    border: 1.5px solid;
}

.ownership-badge--lead {
    background: rgba(16, 185, 129, 0.1);
    color: #059669;
    border-color: #10b981;
}

.ownership-badge--owner {
    background: rgba(99, 102, 241, 0.1);
    color: #4f46e5;
    border-color: #6366f1;
}

.ownership-badge--global {
    background: rgba(245, 158, 11, 0.1);
    color: #d97706;
    border-color: #f59e0b;
}

/* Summary Section - Quick scan content */
.timeline__summary {
    margin-bottom: var(--spacing-md);
}

.timeline__summary-title {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-sm);
}

.timeline__list {
    padding-left: var(--spacing-lg);
    list-style: disc;
    color: var(--color-text-muted);
}

.timeline__list li {
    margin-bottom: var(--spacing-xs);
    line-height: 1.7;
}

.timeline__list li strong {
    color: var(--color-text);
    font-weight: 600;
}

/* Expandable Toggle Button */
.timeline__toggle {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--color-primary);
    font-weight: 600;
    font-size: 0.9rem;
    padding: var(--spacing-sm) 0;
    margin-top: var(--spacing-sm);
    transition: gap var(--transition-fast), color var(--transition-fast);
    cursor: pointer;
    background: none;
    border: none;
}

.timeline__toggle:hover {
    gap: var(--spacing-md);
    color: var(--color-primary-dark);
}

.timeline__toggle svg {
    transition: transform var(--transition-fast);
}

.timeline__toggle[aria-expanded="true"] svg {
    transform: rotate(180deg);
}

/* Technical Details Section - Deep-dive content */
.timeline__details {
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
    animation: slideDown var(--transition-base);
}

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

.detail-section:last-child {
    margin-bottom: 0;
}

.detail-section h4 {
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
    padding-bottom: var(--spacing-xs);
    border-bottom: 1px dashed var(--color-border);
}

.detail-section ul {
    padding-left: var(--spacing-lg);
    list-style: disc;
    color: var(--color-text-muted);
}

.detail-section li {
    margin-bottom: var(--spacing-xs);
    line-height: 1.7;
}

.detail-section li strong {
    color: var(--color-text);
    font-weight: 600;
}

.timeline__location {
    display: inline-block;
    font-size: 0.8em;
    font-weight: 600;
    margin-left: 0.75em;
    padding: 0.2em 0.75em;
    border-radius: 1em;
    vertical-align: middle;
}

.timeline__location.remote {
    background: rgba(0, 191, 174, 0.1);
    color: #00796b;
    border: 1.5px solid #00bfae;
}

.timeline__location.onsite {
    background: rgba(255, 152, 0, 0.1);
    color: #e65100;
    border: 1.5px solid #ff9800;
}

/* ===================================
   Skills Section
   =================================== */
.skills__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-lg);
}

.skill-group {
    background: var(--color-bg-card);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--color-border);
}

.skill-group__title {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--color-border);
}

.skill-group__title svg {
    color: var(--color-primary);
}

.skill-group__tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.skill-tag {
    font-size: 0.875rem;
    font-weight: 500;
    padding: 0.5rem 1rem;
    background: var(--color-bg-alt);
    color: var(--color-text);
    border-radius: var(--radius-full);
    border: 1px solid var(--color-border);
    transition: all var(--transition-fast);
}

.skill-tag:hover {
    border-color: var(--color-primary);
    background: var(--color-primary-light);
    color: var(--color-primary);
}

/* ===================================
   Certifications Section
   =================================== */
.certifications {
    background: var(--color-bg-alt);
}

.certifications__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--spacing-lg);
}

.cert-card {
    position: relative;
    background: var(--color-bg-card);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    text-align: center;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--color-border);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
    overflow: hidden;
}

.cert-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

/* NEW Ribbon Style */
.cert-card__ribbon {
    position: absolute;
    top: 16px;
    right: -35px;
    background: linear-gradient(135deg, #10b981, #059669);
    color: white;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0.35rem 2.5rem;
    transform: rotate(45deg);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    z-index: 10;
}

.cert-card--new {
    border-color: #10b981;
    box-shadow: var(--shadow-md), 0 0 0 1px rgba(16, 185, 129, 0.3);
}

.cert-card__badge {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 6rem;
    height: 6rem;
    margin: 0 auto var(--spacing-md);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.cert-card__badge img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.cert-card__title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
}

.cert-card__issuer {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.cert-card__description {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.cert-card__dates {
    font-size: 0.75rem;
    color: var(--color-text-light);
    margin-top: var(--spacing-sm);
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--color-border-light);
}

.cert-card__verify {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-md);
    padding: 0.4rem 0.8rem;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--color-primary);
    background: var(--color-primary-light);
    border-radius: var(--radius-full);
    transition: all var(--transition-fast);
}

.cert-card__verify:hover {
    background: var(--color-primary);
    color: white;
    transform: translateY(-2px);
}

/* ===================================
   Contact Section
   =================================== */
.contact__grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
}

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

.contact__info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.contact__item {
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-start;
}

.contact__icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 3rem;
    height: 3rem;
    background: var(--color-primary-light);
    border-radius: var(--radius-lg);
    color: var(--color-primary);
    flex-shrink: 0;
}

.contact__details h3 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
}

.contact__details p,
.contact__details a {
    color: var(--color-text-muted);
    word-break: break-word;
}

.contact__details a:hover {
    color: var(--color-primary);
}

.copy-email {
    margin-top: var(--spacing-sm);
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    color: var(--color-text);
}

.copy-email:hover {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

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

.contact__cta-content {
    background: linear-gradient(135deg, var(--color-primary-light), var(--color-accent-light));
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    text-align: center;
    border: 1px solid var(--color-border);
}

.contact__cta-content h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
}

.contact__cta-content p {
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-lg);
    max-width: 300px;
    margin-left: auto;
    margin-right: auto;
}

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

.footer p {
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

.footer__tagline {
    margin-top: var(--spacing-sm);
    color: var(--color-primary) !important;
    font-weight: 500;
}

/* ===================================
   Back to Top Button
   =================================== */
.back-to-top {
    position: fixed;
    bottom: var(--spacing-xl);
    right: var(--spacing-xl);
    width: 3rem;
    height: 3rem;
    background: var(--color-primary);
    color: white;
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-fast);
    z-index: 999;
}

.back-to-top:not([hidden]) {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--color-primary-dark);
    transform: translateY(-3px);
}

/* ===================================
   Toast Notification
   =================================== */
.toast {
    position: fixed;
    bottom: var(--spacing-xl);
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--color-text);
    color: var(--color-bg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    z-index: 9999;
}

.toast:not([hidden]) {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.toast__icon {
    color: var(--color-success);
}

.toast__message {
    font-weight: 500;
}

/* ===================================
   Reveal Animations
   =================================== */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Staggered animations for grid items */
.highlights__grid .reveal:nth-child(1) { transition-delay: 0ms; }
.highlights__grid .reveal:nth-child(2) { transition-delay: 100ms; }
.highlights__grid .reveal:nth-child(3) { transition-delay: 200ms; }
.highlights__grid .reveal:nth-child(4) { transition-delay: 300ms; }
.highlights__grid .reveal:nth-child(5) { transition-delay: 400ms; }

.projects__grid .reveal:nth-child(1) { transition-delay: 0ms; }
.projects__grid .reveal:nth-child(2) { transition-delay: 100ms; }
.projects__grid .reveal:nth-child(3) { transition-delay: 200ms; }
.projects__grid .reveal:nth-child(4) { transition-delay: 300ms; }
.projects__grid .reveal:nth-child(5) { transition-delay: 400ms; }

.certifications__grid .reveal:nth-child(1) { transition-delay: 0ms; }
.certifications__grid .reveal:nth-child(2) { transition-delay: 100ms; }
.certifications__grid .reveal:nth-child(3) { transition-delay: 200ms; }
.certifications__grid .reveal:nth-child(4) { transition-delay: 300ms; }
.certifications__grid .reveal:nth-child(5) { transition-delay: 400ms; }

/* ===================================
   Responsive Adjustments
   =================================== */
@media (max-width: 480px) {
    :root {
        --container-padding: 1rem;
    }
    
    .section {
        padding: var(--spacing-2xl) 0;
    }
    
    .hero__actions {
        flex-direction: column;
        align-items: stretch;
    }
    
    .btn {
        justify-content: center;
    }
    
    .projects__grid {
        grid-template-columns: 1fr;
    }
    
    .skills__grid {
        grid-template-columns: 1fr;
    }
    
    .timeline {
        padding-left: var(--spacing-lg);
    }
    
    .timeline__marker {
        left: calc(-1 * var(--spacing-lg) - 6px);
    }
}

/* Print styles */
@media print {
    .header,
    .back-to-top,
    .toast,
    .theme-toggle,
    .hero__actions {
        display: none !important;
    }
    
    .section {
        padding: 1rem 0;
    }
    
    body {
        color: #000;
        background: #fff;
    }
}