/* ============================================
   USAMA MASOOD PORTFOLIO - MODERN DESIGN SYSTEM
   Mobile-First | Dark Theme | Glassmorphism
   ============================================ */

/* CSS Custom Properties */
:root {
    /* Colors - Dark Theme */
    --bg-primary: #050510;
    --bg-secondary: #0a0a1a;
    --bg-tertiary: #10102a;
    --bg-card: rgba(20, 20, 45, 0.6);
    --bg-card-hover: rgba(30, 30, 60, 0.8);

    /* Accent Colors */
    --accent-primary: #10b981;
    --accent-secondary: #059669;
    --accent-tertiary: #34d399;
    --accent-glow: rgba(16, 185, 129, 0.4);

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #10b981 0%, #059669 50%, #34d399 100%);
    --gradient-secondary: linear-gradient(135deg, #0ea5e9 0%, #10b981 100%);
    --gradient-mesh: radial-gradient(ellipse at 30% 20%, rgba(16, 185, 129, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 70% 80%, rgba(5, 150, 105, 0.1) 0%, transparent 50%);

    /* Text Colors */
    --text-primary: #ffffff;
    --text-secondary: #a1a1aa;
    --text-tertiary: #71717a;
    --text-accent: #6ee7b7;

    /* Borders */
    --border-subtle: rgba(255, 255, 255, 0.06);
    --border-medium: rgba(255, 255, 255, 0.1);
    --border-accent: rgba(16, 185, 129, 0.3);

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 40px var(--accent-glow);

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;

    /* Sizing */
    --container-max: 1200px;
    --nav-height: 70px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;
    --transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);

    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --radius-full: 9999px;
}

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

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

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

/* Selection */
::selection {
    background: var(--accent-primary);
    color: white;
}

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

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

/* Lists */
ul,
ol {
    list-style: none;
}

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

/* ============================================
   NAVIGATION
   ============================================ */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: var(--nav-height);
    background: rgba(5, 5, 16, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-subtle);
    transition: all var(--transition-base);
}

.nav.scrolled {
    background: rgba(5, 5, 16, 0.95);
    box-shadow: var(--shadow-md);
}

.nav-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-lg);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-toggle {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 44px;
    height: 44px;
    background: transparent;
    border: none;
    cursor: pointer;
    z-index: 1001;
}

.hamburger {
    position: relative;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition-fast);
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition-fast);
}

.hamburger::before {
    top: -8px;
}

.hamburger::after {
    bottom: -8px;
}

.nav-toggle.active .hamburger {
    background: transparent;
}

.nav-toggle.active .hamburger::before {
    top: 0;
    transform: rotate(45deg);
}

.nav-toggle.active .hamburger::after {
    bottom: 0;
    transform: rotate(-45deg);
}

.nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 100%;
    max-width: 320px;
    height: 100vh;
    background: var(--bg-secondary);
    padding: calc(var(--nav-height) + var(--space-xl)) var(--space-xl) var(--space-xl);
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    transition: right var(--transition-slow);
    border-left: 1px solid var(--border-subtle);
}

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

.nav-link {
    display: block;
    padding: var(--space-md) var(--space-lg);
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-secondary);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
    color: var(--text-primary);
    background: rgba(99, 102, 241, 0.1);
}

.nav-cta {
    margin-top: var(--space-md);
    background: var(--gradient-primary);
    color: var(--text-primary) !important;
    text-align: center;
}

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

    .nav-menu {
        position: static;
        width: auto;
        max-width: none;
        height: auto;
        background: transparent;
        padding: 0;
        flex-direction: row;
        align-items: center;
        gap: var(--space-xs);
        border: none;
    }

    .nav-link {
        padding: var(--space-sm) var(--space-md);
        font-size: 0.875rem;
    }

    .nav-cta {
        margin-top: 0;
        margin-left: var(--space-sm);
        padding: var(--space-sm) var(--space-lg);
    }
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
    position: relative;
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: calc(var(--nav-height) + var(--space-xl)) var(--space-lg) var(--space-4xl);
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.hero-gradient {
    position: absolute;
    inset: 0;
    background: var(--gradient-mesh);
}

.hero-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(99, 102, 241, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(99, 102, 241, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, black 20%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 20%, transparent 70%);
}

.hero-particles {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

/* Hero Wrapper - Layout for content and photo */
.hero-wrapper {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-3xl);
    width: 100%;
    max-width: 1100px;
}

@media (min-width: 900px) {
    .hero-wrapper {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
    }
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 600px;
    text-align: center;
}

@media (min-width: 900px) {
    .hero-content {
        text-align: left;
        flex: 1;
    }

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

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

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

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

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

/* Hero Profile Photo */
.hero-photo {
    flex-shrink: 0;
    animation: fadeInUp 0.6s ease 0.3s forwards;
    opacity: 0;
}

.photo-wrapper {
    position: relative;
    width: 280px;
    height: 280px;
}

@media (min-width: 768px) {
    .photo-wrapper {
        width: 320px;
        height: 320px;
    }
}

.profile-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: var(--radius-xl);
    border: 3px solid var(--border-accent);
    box-shadow: var(--shadow-lg);
    position: relative;
    z-index: 2;
}

.photo-glow {
    position: absolute;
    inset: -20px;
    background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
    border-radius: var(--radius-xl);
    z-index: 1;
    animation: photoGlow 3s ease-in-out infinite alternate;
}

@keyframes photoGlow {
    from {
        opacity: 0.5;
        transform: scale(0.95);
    }

    to {
        opacity: 1;
        transform: scale(1);
    }
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid var(--border-accent);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-accent);
    margin-bottom: var(--space-xl);
    animation: fadeInUp 0.6s ease forwards;
    max-width: 100%;
    flex-wrap: wrap;
    justify-content: center;
    text-align: center;
    white-space: normal;
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: #22c55e;
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {

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

    50% {
        opacity: 0.5;
        transform: scale(1.2);
    }
}

.hero-title {
    margin-bottom: var(--space-lg);
    animation: fadeInUp 0.6s ease 0.1s forwards;
    opacity: 0;
    text-align: center;
}

.hero-greeting {
    display: block;
    font-size: 1.125rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: var(--space-sm);
}

.hero-name {
    display: block;
    font-size: clamp(2.5rem, 8vw, 4rem);
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.1;
}

.hero-subtitle {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--space-sm);
    font-size: 1.25rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: var(--space-lg);
    animation: fadeInUp 0.6s ease 0.2s forwards;
    opacity: 0;
}

.hero-divider {
    color: var(--accent-primary);
}

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

.hero-typing-line {
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: var(--space-lg);
    animation: fadeInUp 0.6s ease 0.25s forwards;
    opacity: 0;
    /* Strict height to prevent layout shift */
    height: 1.6em;
    line-height: 1.6;
    overflow: hidden;
}

.hero-description {
    font-size: 1rem;
    color: var(--text-secondary);
    max-width: 540px;
    margin: 0 auto var(--space-xl);
    animation: fadeInUp 0.6s ease 0.3s forwards;
    opacity: 0;
}

.hero-description strong {
    color: var(--text-primary);
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
    padding: var(--space-lg);
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(10px);
    animation: fadeInUp 0.6s ease 0.4s forwards;
    opacity: 0;
}

@media (max-width: 480px) {
    .hero-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-sm);
        padding: var(--space-md);
    }
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: clamp(1.5rem, 4vw, 2rem);
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.hero-actions {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
    animation: fadeInUp 0.6s ease 0.5s forwards;
    opacity: 0;
}

@media (min-width: 480px) {
    .hero-actions {
        flex-direction: row;
        justify-content: center;
    }
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    font-size: 0.9375rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
    border: none;
    outline: none;
    max-width: 100%;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 20px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(99, 102, 241, 0.4);
}

.btn-secondary {
    background: var(--bg-card);
    color: var(--text-primary);
    border: 1px solid var(--border-medium);
}

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

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

.btn-outline:hover {
    border-color: var(--accent-primary);
    background: rgba(99, 102, 241, 0.1);
}

/* Hero Socials */
.hero-socials {
    display: flex;
    justify-content: center;
    gap: var(--space-md);
    animation: fadeInUp 0.6s ease 0.6s forwards;
    opacity: 0;
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    transition: all var(--transition-base);
}

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

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: var(--space-xl);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    color: var(--text-tertiary);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    animation: fadeIn 1s ease 1s forwards;
    opacity: 0;
}

.scroll-mouse {
    width: 24px;
    height: 38px;
    border: 2px solid var(--border-medium);
    border-radius: 12px;
    display: flex;
    justify-content: center;
    padding-top: 6px;
}

.scroll-wheel {
    width: 4px;
    height: 8px;
    background: var(--accent-primary);
    border-radius: 2px;
    animation: scrollDown 1.5s ease-in-out infinite;
}

@keyframes scrollDown {
    0% {
        opacity: 1;
        transform: translateY(0);
    }

    100% {
        opacity: 0;
        transform: translateY(10px);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

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

@keyframes fadeIn {
    to {
        opacity: 1;
    }
}

/* ============================================
   SECTIONS - GENERAL
   ============================================ */
.section {
    padding: var(--space-4xl) 0;
    position: relative;
}

.section-header {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    margin-bottom: var(--space-3xl);
}

.section-tag {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--accent-primary);
}

.section-title {
    font-size: clamp(1.75rem, 5vw, 2.5rem);
    font-weight: 700;
    color: var(--text-primary);
}

.section-line {
    flex: 1;
    height: 1px;
    background: linear-gradient(90deg, var(--border-medium), transparent);
}

/* ============================================
   ABOUT SECTION
   ============================================ */
.about {
    background: var(--bg-secondary);
}

.about-content {
    display: grid;
    gap: var(--space-3xl);
}

@media (min-width: 768px) {
    .about-content {
        grid-template-columns: 280px 1fr;
        gap: var(--space-4xl);
    }
}

.about-image {
    display: flex;
    justify-content: center;
}

.image-frame {
    position: relative;
    width: 200px;
    height: 200px;
}

.image-placeholder {
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    font-weight: 800;
    color: white;
}

.image-decoration {
    position: absolute;
    inset: -10px;
    border: 2px solid var(--accent-primary);
    border-radius: var(--radius-lg);
    transform: rotate(6deg);
    opacity: 0.3;
}

.about-text p {
    color: var(--text-secondary);
    margin-bottom: var(--space-lg);
}

.about-intro {
    font-size: 1.125rem;
    color: var(--text-primary) !important;
}

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

.about-text em {
    color: var(--text-accent);
    font-style: normal;
}

.about-expertise {
    margin-top: var(--space-2xl);
}

.about-expertise h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-lg);
}

.expertise-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
}

@media (min-width: 480px) {
    .expertise-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.expertise-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md);
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    color: var(--text-secondary);
    transition: all var(--transition-base);
}

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

.expertise-icon {
    font-size: 1.25rem;
}

/* ============================================
   EXPERIENCE SECTION
   ============================================ */
.timeline {
    position: relative;
}

.timeline-item {
    display: grid;
    grid-template-columns: 24px 1fr;
    gap: var(--space-xl);
    padding-bottom: var(--space-3xl);
}

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

.timeline-marker {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.timeline-dot {
    width: 14px;
    height: 14px;
    background: var(--accent-primary);
    border-radius: 50%;
    box-shadow: 0 0 0 4px var(--bg-primary), 0 0 20px var(--accent-glow);
    z-index: 1;
}

.timeline-line {
    flex: 1;
    width: 2px;
    background: linear-gradient(180deg, var(--accent-primary), transparent);
    margin-top: var(--space-md);
}

.timeline-item:last-child .timeline-line {
    display: none;
}

.timeline-content {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    transition: all var(--transition-base);
}

.timeline-content:hover {
    border-color: var(--border-accent);
    box-shadow: var(--shadow-glow);
}

.timeline-header {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.company-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    background: var(--gradient-secondary);
    border-radius: var(--radius-md);
    font-weight: 700;
    font-size: 0.875rem;
    color: white;
}

.timeline-meta h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
}

.timeline-location {
    font-size: 0.875rem;
    color: var(--text-tertiary);
}

.role {
    padding: var(--space-lg) 0;
    border-top: 1px solid var(--border-subtle);
}

.role:first-of-type {
    border-top: none;
    padding-top: 0;
}

.role-header {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: baseline;
    gap: var(--space-sm);
    margin-bottom: var(--space-md);
}

.role-header h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.role-date {
    font-size: 0.875rem;
    font-family: var(--font-mono);
    color: var(--accent-primary);
}

.role-highlights {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.role-highlights li {
    position: relative;
    padding-left: var(--space-lg);
    font-size: 0.9375rem;
    color: var(--text-secondary);
}

.role-highlights li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--accent-primary);
}

.role-highlights li strong {
    color: var(--text-primary);
}

.loading-placeholder {
    text-align: center;
    padding: var(--space-2xl);
}

.placeholder-text {
    color: var(--text-tertiary);
    font-style: italic;
}

/* ============================================
   PATENTS SECTION
   ============================================ */
.patents {
    background: var(--bg-secondary);
}

.patents-grid {
    display: grid;
    gap: var(--space-lg);
}

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

.patent-card {
    display: flex;
    gap: var(--space-lg);
    padding: var(--space-xl);
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.patent-card:hover {
    border-color: var(--border-accent);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.patent-icon {
    flex-shrink: 0;
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(99, 102, 241, 0.1);
    border-radius: var(--radius-md);
    color: var(--accent-primary);
}

.patent-content h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
    line-height: 1.4;
}

.patent-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    margin-bottom: var(--space-sm);
}

.patent-number {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-tertiary);
}

.patent-status {
    font-size: 0.75rem;
    font-weight: 600;
    padding: 2px 8px;
    border-radius: var(--radius-sm);
}

.patent-status.granted {
    background: rgba(34, 197, 94, 0.2);
    color: #22c55e;
}

.patent-status.pending {
    background: rgba(234, 179, 8, 0.2);
    color: #eab308;
}

.patent-assignee {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
}

.patent-link {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--accent-primary);
    transition: color var(--transition-fast);
}

.patent-link:hover {
    color: var(--accent-tertiary);
}

.patent-link.disabled {
    color: var(--text-tertiary);
    pointer-events: none;
}

/* ============================================
   PUBLICATIONS SECTION
   ============================================ */
.publications-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-md);
    margin-bottom: var(--space-3xl);
    padding: var(--space-xl);
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    text-align: center;
}

.pub-stat-number {
    display: block;
    font-size: clamp(1.5rem, 4vw, 2.5rem);
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.pub-stat-label {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.publications-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.publication-item {
    display: flex;
    gap: var(--space-lg);
    padding: var(--space-lg);
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

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

.publication-item.featured {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(139, 92, 246, 0.05));
    border-color: var(--border-accent);
}

.publication-citations {
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 60px;
    padding: var(--space-md);
    background: rgba(99, 102, 241, 0.1);
    border-radius: var(--radius-md);
}

.citation-count {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--accent-primary);
}

.citation-label {
    font-size: 0.625rem;
    color: var(--text-tertiary);
    text-transform: uppercase;
}

.publication-content h3 {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-xs);
    line-height: 1.4;
}

.publication-venue {
    font-size: 0.8125rem;
    color: var(--text-tertiary);
    margin-bottom: var(--space-sm);
}

.publication-highlight {
    font-size: 0.8125rem;
    color: var(--text-accent);
    margin-bottom: var(--space-sm);
}

.publication-link {
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--accent-primary);
}

.publication-link:hover {
    color: var(--accent-tertiary);
}

.publications-more {
    display: flex;
    justify-content: center;
    margin-top: var(--space-2xl);
}

/* ============================================
   PROJECTS SECTION
   ============================================ */
.projects {
    background: var(--bg-secondary);
}

.projects-grid {
    display: grid;
    gap: var(--space-lg);
}

@media (min-width: 640px) {
    .projects-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

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

.project-card {
    padding: var(--space-xl);
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.project-card:hover {
    border-color: var(--border-accent);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.project-card.featured {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(139, 92, 246, 0.05));
    border-color: rgba(99, 102, 241, 0.3);
}

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

.project-icon {
    font-size: 1.5rem;
}

.project-year {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-tertiary);
}

.project-card h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
}

.project-card p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
    line-height: 1.6;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
}

.tag {
    padding: 4px 10px;
    background: rgba(99, 102, 241, 0.1);
    border-radius: var(--radius-sm);
    font-size: 0.6875rem;
    font-weight: 500;
    color: var(--text-accent);
}

.project-impact {
    margin-top: var(--space-md);
    padding-top: var(--space-md);
    border-top: 1px solid var(--border-subtle);
}

.impact-badge {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--accent-tertiary);
}

/* ============================================
   AWARDS SECTION
   ============================================ */
.awards-featured {
    display: grid;
    gap: var(--space-lg);
    margin-bottom: var(--space-3xl);
}

@media (min-width: 640px) {
    .awards-featured {
        grid-template-columns: repeat(2, 1fr);
    }
}

.award-card {
    display: flex;
    gap: var(--space-lg);
    padding: var(--space-xl);
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.award-card:hover {
    border-color: var(--border-accent);
    transform: translateY(-4px);
}

.visa-card {
    background: linear-gradient(135deg, rgba(234, 179, 8, 0.1), rgba(99, 102, 241, 0.05));
    border-color: rgba(234, 179, 8, 0.3);
}

.award-badge {
    flex-shrink: 0;
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #eab308, #f59e0b);
    border-radius: var(--radius-md);
    color: white;
}

.award-content h3 {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-xs);
}

.award-issuer {
    font-size: 0.8125rem;
    color: var(--text-accent);
    margin-bottom: var(--space-sm);
}

.award-description {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.awards-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.award-item {
    display: flex;
    gap: var(--space-lg);
    padding: var(--space-lg);
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

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

.award-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(99, 102, 241, 0.1);
    border-radius: var(--radius-md);
    font-size: 1.5rem;
}

.award-icon.winner {
    background: linear-gradient(135deg, rgba(234, 179, 8, 0.2), rgba(234, 179, 8, 0.1));
}

.award-info h4 {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 2px;
}

.award-company {
    font-size: 0.8125rem;
    color: var(--text-accent);
    margin-bottom: var(--space-sm);
}

.award-info p {
    font-size: 0.8125rem;
    color: var(--text-secondary);
}

/* ============================================
   CONTACT SECTION
   ============================================ */
.contact {
    background: var(--bg-secondary);
}

.contact-content {
    max-width: 600px;
    margin: 0 auto;
}

.contact-intro {
    font-size: 1.125rem;
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: var(--space-3xl);
}

.contact-methods {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    margin-bottom: var(--space-3xl);
}

.contact-method {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    padding: var(--space-lg);
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

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

.method-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(99, 102, 241, 0.1);
    border-radius: var(--radius-md);
    color: var(--accent-primary);
}

.method-label {
    display: block;
    font-size: 0.75rem;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.method-value {
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--text-primary);
}

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

.contact-services h4 {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-md);
}

.contact-services ul {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-sm);
}

.contact-services li {
    padding: var(--space-sm) var(--space-md);
    background: rgba(99, 102, 241, 0.1);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    color: var(--text-accent);
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    padding: var(--space-2xl) 0;
    border-top: 1px solid var(--border-subtle);
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-lg);
    text-align: center;
}

@media (min-width: 768px) {
    .footer-content {
        flex-direction: row;
        justify-content: space-between;
        text-align: left;
    }
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.footer-logo {
    font-size: 1.25rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.footer-links {
    display: flex;
    gap: var(--space-lg);
}

.footer-links a {
    font-size: 0.875rem;
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

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

.footer-socials {
    display: flex;
    gap: var(--space-md);
}

.footer-socials a {
    color: var(--text-tertiary);
    transition: color var(--transition-fast);
}

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

/* ============================================
   EDUCATION SECTION (within Experience)
   ============================================ */
.education-section {
    margin-top: var(--space-3xl);
    padding-top: var(--space-2xl);
    border-top: 1px solid var(--border-subtle);
}

.subsection-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-xl);
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.subsection-title::after {
    content: '';
    flex: 1;
    height: 1px;
    background: linear-gradient(90deg, var(--border-medium), transparent);
}

.education-grid {
    display: grid;
    gap: var(--space-lg);
}

@media (min-width: 768px) {
    .education-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.education-card {
    display: flex;
    gap: var(--space-md);
    padding: var(--space-lg);
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

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

.edu-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.edu-content h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-xs);
}

.edu-school {
    font-size: 0.875rem;
    color: var(--accent-primary);
    margin-bottom: var(--space-xs);
}

.edu-focus {
    font-size: 0.8125rem;
    color: var(--text-secondary);
}

.edu-thesis {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    font-style: italic;
    margin-top: var(--space-xs);
}

/* Company Logo Variations */
.company-logo.tmobile-logo {
    background: linear-gradient(135deg, #e20074 0%, #ff4da6 100%);
    font-size: 1.5rem;
    font-weight: 800;
}

.company-logo.ou-logo {
    background: linear-gradient(135deg, #841617 0%, #c4302b 100%);
    font-size: 0.875rem;
}

.company-logo.lums-logo {
    background: linear-gradient(135deg, #003366 0%, #0066cc 100%);
    font-size: 0.625rem;
    letter-spacing: 0.05em;
}

.company-logo.riphah-logo {
    background: linear-gradient(135deg, #1a5f2f 0%, #2d9f54 100%);
    font-size: 0.625rem;
}

.company-logo.att-logo {
    background: linear-gradient(135deg, #0078d4 0%, #00bcf2 100%);
    font-size: 0.75rem;
}

/* ============================================
   TESTIMONIALS SECTION
   ============================================ */
.testimonials {
    background: var(--bg-secondary);
}

.testimonials-grid {
    display: grid;
    gap: var(--space-lg);
}

@media (min-width: 640px) {
    .testimonials-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .testimonials-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.testimonial-card {
    padding: var(--space-xl);
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    position: relative;
}

.testimonial-card:hover {
    border-color: var(--border-accent);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.testimonial-quote {
    position: absolute;
    top: var(--space-md);
    left: var(--space-lg);
    font-size: 4rem;
    font-weight: 800;
    color: var(--accent-primary);
    opacity: 0.2;
    line-height: 1;
    font-family: Georgia, serif;
}

.testimonial-text {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-xl);
    position: relative;
    z-index: 1;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding-top: var(--space-md);
    border-top: 1px solid var(--border-subtle);
}

.author-info h4 {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--text-primary);
}

.author-info p {
    font-size: 0.8125rem;
    color: var(--accent-primary);
}

/* ============================================
   ANIMATIONS - SCROLL REVEAL
   ============================================ */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

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

/* Stagger children */
.stagger-children>* {
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.4s ease;
}

.stagger-children.active>*:nth-child(1) {
    transition-delay: 0.1s;
}

.stagger-children.active>*:nth-child(2) {
    transition-delay: 0.2s;
}

.stagger-children.active>*:nth-child(3) {
    transition-delay: 0.3s;
}

.stagger-children.active>*:nth-child(4) {
    transition-delay: 0.4s;
}

.stagger-children.active>*:nth-child(5) {
    transition-delay: 0.5s;
}

.stagger-children.active>*:nth-child(6) {
    transition-delay: 0.6s;
}

.stagger-children.active>*:nth-child(7) {
    transition-delay: 0.7s;
}

.stagger-children.active>*:nth-child(8) {
    transition-delay: 0.8s;
}

.stagger-children.active>* {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================
   UTILITY CLASSES
   ============================================ */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Mobile-first typography sizing */
@media (min-width: 640px) {
    body {
        font-size: 17px;
    }
}

@media (min-width: 1024px) {
    body {
        font-size: 18px;
    }
}

/* ============================================
   SKILLS SECTION
   ============================================ */
.skills {
    background: var(--bg-secondary);
}

.skills-grid {
    display: grid;
    gap: var(--space-xl);
}

@media (min-width: 768px) {
    .skills-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.skill-category {
    padding: var(--space-xl);
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.skill-category:hover {
    border-color: var(--border-accent);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.skill-category-header {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.skill-icon {
    font-size: 1.5rem;
}

.skill-category h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.skill-tag {
    padding: 6px 12px;
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.2);
    border-radius: var(--radius-full);
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--text-accent);
    transition: all var(--transition-fast);
}

.skill-tag:hover {
    background: rgba(99, 102, 241, 0.2);
    border-color: var(--accent-primary);
}

/* ============================================
   VOLUNTEERING SECTION
   ============================================ */
.volunteering-grid {
    display: grid;
    gap: var(--space-lg);
}

@media (min-width: 768px) {
    .volunteering-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.volunteer-card {
    display: flex;
    gap: var(--space-lg);
    padding: var(--space-xl);
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.volunteer-card:hover {
    border-color: var(--border-accent);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.volunteer-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(139, 92, 246, 0.1));
    border-radius: var(--radius-md);
    font-size: 1.5rem;
}

.volunteer-content h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-xs);
}

.volunteer-org {
    font-size: 0.875rem;
    color: var(--accent-primary);
    font-weight: 500;
    margin-bottom: var(--space-sm);
}

.volunteer-desc {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ============================================
   CERTIFICATIONS SECTION
   ============================================ */
.certifications {
    background: var(--bg-secondary);
}

.certifications-grid {
    display: grid;
    gap: var(--space-lg);
}

@media (min-width: 640px) {
    .certifications-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .certifications-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.certification-card {
    display: flex;
    gap: var(--space-lg);
    padding: var(--space-xl);
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.certification-card:hover {
    border-color: var(--border-accent);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.cert-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(234, 179, 8, 0.15), rgba(234, 179, 8, 0.05));
    border-radius: var(--radius-md);
    font-size: 1.5rem;
}

.cert-content h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-xs);
}

.cert-issuer {
    font-size: 0.8125rem;
    color: var(--text-tertiary);
    margin-bottom: var(--space-sm);
}

.cert-link {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--accent-primary);
    transition: color var(--transition-fast);
}

.cert-link:hover {
    color: var(--accent-tertiary);
}

/* Education thesis link styling */
.edu-thesis a {
    color: var(--accent-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.edu-thesis a:hover {
    color: var(--accent-tertiary);
    text-decoration: underline;
}

/* About section profile image */
.about-profile-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: var(--radius-lg);
}

/* About section rotating carousel */
.about-carousel {
    position: relative;
    width: 100%;
    height: 100%;
    overflow: hidden;
    border-radius: var(--radius-lg);
}

.about-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0;
    animation: slideRotate 10s infinite;
    border-radius: var(--radius-lg);
}

.about-slide:nth-child(1) {
    animation-delay: 0s;
}

.about-slide:nth-child(2) {
    animation-delay: 5s;
}

@keyframes slideRotate {
    0% {
        opacity: 0;
        transform: scale(1.05);
    }

    5% {
        opacity: 1;
        transform: scale(1);
    }

    45% {
        opacity: 1;
        transform: scale(1);
    }

    50% {
        opacity: 0;
        transform: scale(0.98);
    }

    100% {
        opacity: 0;
    }
}