/* ==========================================
   PROFESSIONAL PORTFOLIO - LIGHT THEME
   Inspired by Modern Data Science Portfolios
   Color Palette: White, Light Gray, Dark Navy, Muted Red
   ========================================== */

:root {
    /* Primary Colors - Light Theme */
    --color-white: #ffffff;
    --color-off-white: #f9fafb;
    --color-light-gray: #f3f4f6;
    --color-gray: #e5e7eb;
    --color-text-dark: #1f2937;
    --color-text-gray: #6b7280;
    --color-text-light: #9ca3af;
    
    /* Accent Colors */
    --color-red-primary: #991b1b;
    --color-red-light: #b91c1c;
    --color-red-dark: #7f1d1d;
    --color-red-subtle: #fee2e2;
    
    /* Navy for Dark Sections */
    --color-navy-dark: #1e293b;
    --color-navy: #0f172a;
    
    /* Typography */
    --font-serif: 'Playfair Display', 'Georgia', serif;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 3rem;
    --spacing-xl: 3.5rem;
    
    /* Transitions */
    --transition: 0.3s ease;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

/* ==========================================
   GLOBAL STYLES
   ========================================== */

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-sans);
    background-color: var(--color-white);
    color: var(--color-text-gray);
    line-height: 1.7;
    overflow-x: hidden;
}

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

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

.bg-light {
    background-color: var(--color-off-white);
}

.bg-dark {
    background-color: var(--color-navy-dark);
    color: var(--color-white);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-serif);
    color: var(--color-text-dark);
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
}

h1 { font-size: 3.5rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 1.875rem; }
h4 { font-size: 1.5rem; }

p {
    margin-bottom: var(--spacing-sm);
    line-height: 1.7;
}

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

/* Section Titles */
.section-title {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-dark);
    font-weight: 600;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--color-text-gray);
    margin-bottom: var(--spacing-lg);
    font-weight: 400;
}

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

/* Section Label */
.section-label {
    font-size: 0.9375rem;
    font-weight: 700;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-red-primary);
    margin-bottom: var(--spacing-md);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.875rem 2rem;
    border-radius: 4px;
    font-weight: 600;
    font-size: 1rem;
    transition: var(--transition);
    cursor: pointer;
    border: 2px solid transparent;
    text-align: center;
    font-family: var(--font-sans);
}

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

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

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

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
}

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

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

/* ==========================================
   NAVIGATION
   ========================================== */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--color-gray);
    transition: var(--transition);
}

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

.logo,
.logo a {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-text-dark);
    text-decoration: none;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2.5rem;
}

.nav-link {
    color: var(--color-text-gray);
    font-weight: 500;
    font-size: 0.9375rem;
    position: relative;
}

.nav-link:hover {
    color: var(--color-text-dark);
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
}

.hamburger span {
    width: 25px;
    height: 2px;
    background: var(--color-text-dark);
    border-radius: 2px;
    transition: var(--transition);
}

/* ==========================================
   HERO SECTION
   ========================================== */

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: flex-start;
    background: linear-gradient(135deg, #0f1419 0%, #1a1f2e 50%, #1a1426 100%);
    position: relative;
    padding-top: 80px;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    right: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    opacity: 0.8;
}

/* Flowing wave pattern with connected nodes */
.hero-background::before {
    content: '';
    position: absolute;
    top: 10%;
    right: -10%;
    width: 70%;
    height: 80%;
    background-image: 
        radial-gradient(circle at 15% 25%, rgba(59, 130, 246, 0.4) 0%, transparent 2%),
        radial-gradient(circle at 25% 35%, rgba(139, 92, 246, 0.3) 0%, transparent 2%),
        radial-gradient(circle at 35% 30%, rgba(59, 130, 246, 0.35) 0%, transparent 2%),
        radial-gradient(circle at 45% 40%, rgba(239, 68, 68, 0.4) 0%, transparent 2%),
        radial-gradient(circle at 55% 35%, rgba(220, 38, 38, 0.3) 0%, transparent 2%),
        radial-gradient(circle at 65% 45%, rgba(239, 68, 68, 0.35) 0%, transparent 2%),
        radial-gradient(circle at 75% 40%, rgba(220, 38, 38, 0.3) 0%, transparent 2%),
        radial-gradient(circle at 85% 50%, rgba(185, 28, 28, 0.25) 0%, transparent 2%),
        radial-gradient(circle at 20% 55%, rgba(59, 130, 246, 0.3) 0%, transparent 2%),
        radial-gradient(circle at 30% 65%, rgba(139, 92, 246, 0.35) 0%, transparent 2%),
        radial-gradient(circle at 40% 60%, rgba(59, 130, 246, 0.3) 0%, transparent 2%),
        radial-gradient(circle at 50% 70%, rgba(239, 68, 68, 0.35) 0%, transparent 2%),
        radial-gradient(circle at 60% 65%, rgba(220, 38, 38, 0.4) 0%, transparent 2%),
        radial-gradient(circle at 70% 75%, rgba(239, 68, 68, 0.3) 0%, transparent 2%),
        radial-gradient(circle at 80% 70%, rgba(185, 28, 28, 0.3) 0%, transparent 2%),
        radial-gradient(circle at 90% 80%, rgba(220, 38, 38, 0.25) 0%, transparent 2%);
    background-size: 100% 100%;
    background-repeat: no-repeat;
    animation: flowWave 15s ease-in-out infinite;
}

/* Connecting lines between nodes */
.hero-background::after {
    content: '';
    position: absolute;
    top: 10%;
    right: -10%;
    width: 70%;
    height: 80%;
    background-image:
        /* Upper wave connections - Blue to Purple */
        linear-gradient(125deg, transparent 14%, rgba(59, 130, 246, 0.3) 15%, rgba(59, 130, 246, 0.3) 15.5%, transparent 16%),
        linear-gradient(110deg, transparent 24%, rgba(99, 102, 241, 0.25) 25%, rgba(99, 102, 241, 0.25) 25.5%, transparent 26%),
        linear-gradient(115deg, transparent 34%, rgba(139, 92, 246, 0.3) 35%, rgba(139, 92, 246, 0.3) 35.5%, transparent 36%),
        
        /* Middle wave connections - Purple to Red gradient */
        linear-gradient(120deg, transparent 44%, rgba(167, 139, 250, 0.25) 45%, rgba(220, 38, 38, 0.35) 45.8%, transparent 46.5%),
        linear-gradient(118deg, transparent 54%, rgba(239, 68, 68, 0.4) 55%, rgba(239, 68, 68, 0.4) 55.5%, transparent 56%),
        linear-gradient(122deg, transparent 64%, rgba(220, 38, 38, 0.35) 65%, rgba(220, 38, 38, 0.35) 65.5%, transparent 66%),
        linear-gradient(116deg, transparent 74%, rgba(239, 68, 68, 0.3) 75%, rgba(239, 68, 68, 0.3) 75.5%, transparent 76%),
        linear-gradient(120deg, transparent 84%, rgba(185, 28, 28, 0.25) 85%, rgba(185, 28, 28, 0.25) 85.5%, transparent 86%),
        
        /* Lower wave connections - Blue */
        linear-gradient(55deg, transparent 19%, rgba(59, 130, 246, 0.25) 20%, rgba(59, 130, 246, 0.25) 20.5%, transparent 21%),
        linear-gradient(60deg, transparent 29%, rgba(99, 102, 241, 0.3) 30%, rgba(99, 102, 241, 0.3) 30.5%, transparent 31%),
        linear-gradient(58deg, transparent 39%, rgba(59, 130, 246, 0.25) 40%, rgba(59, 130, 246, 0.25) 40.5%, transparent 41%),
        
        /* Lower wave connections - Red */
        linear-gradient(62deg, transparent 49%, rgba(220, 38, 38, 0.3) 50%, rgba(239, 68, 68, 0.35) 50.8%, transparent 51.5%),
        linear-gradient(56deg, transparent 59%, rgba(239, 68, 68, 0.4) 60%, rgba(239, 68, 68, 0.4) 60.5%, transparent 61%),
        linear-gradient(60deg, transparent 69%, rgba(220, 38, 38, 0.3) 70%, rgba(220, 38, 38, 0.3) 70.5%, transparent 71%),
        linear-gradient(58deg, transparent 79%, rgba(185, 28, 28, 0.25) 80%, rgba(185, 28, 28, 0.25) 80.5%, transparent 81%),
        linear-gradient(62deg, transparent 89%, rgba(220, 38, 38, 0.2) 90%, rgba(220, 38, 38, 0.2) 90.5%, transparent 91%);
    
    background-size: 100% 100%;
    background-repeat: no-repeat;
    animation: flowWave 15s ease-in-out infinite;
    animation-delay: 0.2s;
}

@keyframes flowWave {
    0%, 100% {
        transform: translateX(0) translateY(0);
        opacity: 0.8;
    }
    25% {
        transform: translateX(-10px) translateY(-5px);
        opacity: 0.9;
    }
    50% {
        transform: translateX(-5px) translateY(-10px);
        opacity: 0.85;
    }
    75% {
        transform: translateX(-15px) translateY(-5px);
        opacity: 0.9;
    }
}

.hero-content {
    position: relative;
    z-index: 2;
    width: 100%;
    padding: var(--spacing-xl) 0;
}

.hero-text {
    max-width: 700px;
}

.hero-label {
    font-size: 0.875rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: #ef4444;
    margin-bottom: 0.75rem;
    font-family: var(--font-sans);
}

.hero-title {
    font-size: 3.75rem;
    font-weight: 400;
    line-height: 1.15;
    margin-bottom: 1.5rem;
    color: rgba(255, 255, 255, 1);
    font-family: var(--font-serif);
    letter-spacing: -0.02em;
}

.hero-heading {
    font-size: 3.75rem;
    font-weight: 400;
    line-height: 1.15;
    margin-bottom: 1.5rem;
    color: var(--color-white);
    font-family: var(--font-serif);
    letter-spacing: -0.02em;
}

.hero-credentials {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.95);
    margin-bottom: 2.5rem;
    font-weight: 400;
    line-height: 1.6;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.btn-hero-primary {
    background-color: #991b1b;
    color: var(--color-white);
    padding: 1rem 2rem;
    border: none;
    font-weight: 600;
}

.btn-hero-primary:hover {
    background-color: #7f1d1d;
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(153, 27, 27, 0.3);
}

.btn-hero-secondary {
    background: transparent;
    color: var(--color-white);
    border: 2px solid rgba(255, 255, 255, 0.3);
    padding: 1rem 2rem;
    font-weight: 600;
}

.btn-hero-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.5);
    transform: translateY(-2px);
}

.btn-hero-primary i,
.btn-hero-secondary i {
    margin-left: 0.5rem;
    font-size: 0.875rem;
}

/* ==========================================
   NEWS TICKER
   ========================================== */

.news-ticker {
    background: var(--color-light-gray);
    padding: 1rem 0;
    overflow: hidden;
    border-top: 1px solid var(--color-gray);
    border-bottom: 1px solid var(--color-gray);
}

.ticker-wrapper {
    overflow: hidden;
}

.ticker-content {
    display: flex;
    animation: scroll 30s linear infinite;
    white-space: nowrap;
}

.ticker-item {
    display: inline-block;
    padding: 0 3rem;
    color: var(--color-text-gray);
    font-size: 0.875rem;
}

.ticker-item i {
    color: var(--color-red-primary);
    margin-right: 0.5rem;
}

@keyframes scroll {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

/* ==========================================
   ABOUT SECTION
   ========================================== */

.about-content {
    display: grid;
    grid-template-columns: 2fr 3fr;
    gap: var(--spacing-xl);
    align-items: start;
}

.about-image {
    position: relative;
}

.image-placeholder {
    width: 100%;
    aspect-ratio: 3/4;
    background: var(--color-light-gray);
    border-radius: 4px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    border: 2px dashed var(--color-gray);
}

.image-placeholder i {
    font-size: 3rem;
    color: var(--color-text-light);
}

.image-placeholder p {
    color: var(--color-text-gray);
    font-size: 0.875rem;
}

.about-text h2 {
    margin-bottom: var(--spacing-md);
}

.about-text p {
    color: var(--color-text-gray);
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

/* ==========================================
   CORE COMPETENCIES
   ========================================== */

.competencies-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.competency-card {
    background: var(--color-white);
    padding: var(--spacing-lg);
    border-radius: 4px;
    border: 1px solid var(--color-gray);
    transition: var(--transition);
}

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

.competency-icon {
    width: 60px;
    height: 60px;
    margin-bottom: var(--spacing-md);
    background: var(--color-red-subtle);
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    color: var(--color-red-primary);
}

.competency-card h3 {
    font-size: 1.375rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-dark);
}

.competency-card p {
    color: var(--color-text-gray);
    font-size: 0.9375rem;
    line-height: 1.7;
}

/* ==========================================
   RESUME SECTION
   ========================================== */

.resume-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    margin-top: var(--spacing-lg);
}

.resume-column-title {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--color-text-dark);
}

.resume-column-title i {
    color: var(--color-red-primary);
    font-size: 1.25rem;
}

.resume-item {
    padding-left: 2rem;
    margin-bottom: var(--spacing-lg);
    position: relative;
}

.resume-item:before {
    content: '';
    position: absolute;
    left: 0;
    top: 6px;
    width: 10px;
    height: 10px;
    background: var(--color-red-primary);
    border-radius: 50%;
}

.resume-date {
    display: inline-block;
    background: var(--color-light-gray);
    color: var(--color-text-gray);
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
}

.resume-item h4 {
    font-size: 1.25rem;
    margin-bottom: 0.25rem;
    color: var(--color-text-dark);
}

.resume-location {
    color: var(--color-red-primary);
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
}

.resume-item p:last-child {
    color: var(--color-text-gray);
    line-height: 1.7;
    font-size: 0.9375rem;
}

.resume-download {
    margin-top: var(--spacing-lg);
}

/* ==========================================
   TECHNICAL SKILLS
   ========================================== */

.skills-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.skill-category {
    background: var(--color-white);
    padding: var(--spacing-md);
    border-radius: 4px;
    border: 1px solid var(--color-gray);
}

.skill-category h3 {
    font-size: 0.8125rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: #6b7280;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
    font-family: var(--font-sans);
}

.skill-category h3 i {
    color: var(--color-red-primary);
    font-size: 1rem;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.skill-tags span {
    background: #f3f4f6;
    color: var(--color-text-dark);
    padding: 0.5rem 1rem;
    border-radius: 4px;
    font-size: 0.875rem;
    font-weight: 500;
    transition: var(--transition);
    cursor: default;
    border: 1px solid transparent;
}

.skill-tags span:hover {
    background: #e5e7eb;
    border-color: #d1d5db;
}

.skill-tag {
    background: var(--color-light-gray);
    color: var(--color-text-dark);
    padding: 0.4rem 0.875rem;
    border-radius: 4px;
    font-size: 0.875rem;
    font-weight: 500;
    transition: var(--transition);
    cursor: default;
}

.skill-tag:hover {
    background: var(--color-gray);
}

/* ==========================================
   PORTFOLIO SECTION
   ========================================== */

.portfolio-filters {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
}

.filter-btn {
    background: var(--color-light-gray);
    color: var(--color-text-gray);
    border: none;
    padding: 0.625rem 1.5rem;
    border-radius: 4px;
    cursor: pointer;
    font-weight: 500;
    font-size: 0.9375rem;
    transition: var(--transition);
    font-family: var(--font-sans);
}

.filter-btn:hover {
    background: var(--color-gray);
    color: var(--color-text-dark);
}

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

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.5rem;
    margin-top: var(--spacing-lg);
}

.portfolio-card {
    background: var(--color-white);
    border-radius: 4px;
    overflow: hidden;
    transition: var(--transition);
    border: 1px solid var(--color-gray);
}

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

.portfolio-image-container {
    width: 100%;
    height: 180px;
    overflow: hidden;
    background: #f3f4f6;
    display: flex;
    align-items: center;
    justify-content: center;
}

.portfolio-image-container img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.portfolio-image {
    width: 100%;
    height: 220px;
    background: var(--color-navy);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.portfolio-image i {
    font-size: 4rem;
    color: rgba(255, 255, 255, 0.3);
}

.portfolio-category {
    position: absolute;
    top: 1rem;
    left: 1rem;
    background: var(--color-red-primary);
    color: var(--color-white);
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.portfolio-content {
    padding: 1.25rem;
}

.portfolio-content h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--color-text-dark);
    font-family: var(--font-sans);
}

.portfolio-content p {
    color: var(--color-text-gray);
    margin-bottom: var(--spacing-md);
    font-size: 0.9375rem;
    line-height: 1.6;
}

.portfolio-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: var(--spacing-md);
}

.portfolio-tags span {
    background: var(--color-light-gray);
    color: var(--color-text-gray);
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 500;
}

.portfolio-tag {
    background: var(--color-light-gray);
    color: var(--color-text-gray);
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 500;
}

.portfolio-buttons {
    display: flex;
    gap: 0.75rem;
    margin-top: var(--spacing-sm);
}

.portfolio-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    background: var(--color-light-gray);
    color: var(--color-text-dark);
    border-radius: 4px;
    font-size: 0.875rem;
    font-weight: 500;
    text-decoration: none;
    transition: var(--transition);
    border: 1px solid transparent;
}

.portfolio-btn:hover {
    background: var(--color-gray);
    border-color: var(--color-gray);
}

.portfolio-btn-primary {
    background: var(--color-red-primary);
    color: var(--color-white);
}

.portfolio-btn-primary:hover {
    background: var(--color-red-dark);
}

.portfolio-links {
    display: flex;
    gap: var(--spacing-sm);
}

.portfolio-link {
    flex: 1;
    text-align: center;
    padding: 0.625rem;
    background: var(--color-light-gray);
    border-radius: 4px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-dark);
    transition: var(--transition);
}

.portfolio-link:hover {
    background: var(--color-red-primary);
    color: var(--color-white);
}

.portfolio-link i {
    margin-right: 0.25rem;
}

/* ==========================================
   WORK / CLIENT COLLABORATIONS
   ========================================== */

.work-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.work-card {
    background: var(--color-white);
    padding: 2rem;
    border-radius: 8px;
    border: 1px solid #e5e7eb;
    transition: var(--transition);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.work-card:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    transform: translateY(-2px);
}

.work-icon {
    width: 56px;
    height: 56px;
    background: #fee2e2;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--color-red-primary);
    margin-bottom: 1.5rem;
}

.work-card h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--color-text-dark);
    font-weight: 600;
    font-family: var(--font-serif);
}

.work-role {
    color: var(--color-red-primary);
    font-weight: 500;
    margin-bottom: 1.5rem;
    font-size: 0.9375rem;
    font-family: var(--font-sans);
}

.work-deliverables h4 {
    font-size: 0.9375rem;
    margin-bottom: 1rem;
    color: var(--color-text-dark);
    font-family: var(--font-sans);
    font-weight: 600;
}

.work-deliverables ul {
    list-style: none;
    margin-bottom: 1.5rem;
}

.work-deliverables li {
    color: #6b7280;
    margin-bottom: 0.75rem;
    padding-left: 1.25rem;
    position: relative;
    font-size: 0.9375rem;
    line-height: 1.6;
}

.work-deliverables li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--color-red-primary);
    font-weight: bold;
}

.work-tools {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tool-tag {
    background: #f3f4f6;
    color: #6b7280;
    padding: 0.375rem 0.875rem;
    border-radius: 4px;
    font-size: 0.8125rem;
    font-weight: 500;
    border: 1px solid transparent;
    transition: var(--transition);
}

.tool-tag:hover {
    background: #e5e7eb;
    border-color: #d1d5db;
}

/* ==========================================
   BLOG SECTION
   ========================================== */

.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.blog-card {
    background: var(--color-white);
    border-radius: 4px;
    overflow: hidden;
    transition: var(--transition);
    border: 1px solid var(--color-gray);
}

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

.blog-image {
    width: 100%;
    height: 200px;
    background: var(--color-navy);
    display: flex;
    align-items: center;
    justify-content: center;
}

.blog-image i {
    font-size: 3rem;
    color: rgba(255, 255, 255, 0.3);
}

.blog-content {
    padding: var(--spacing-md);
}

.blog-meta {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    font-size: 0.875rem;
    color: var(--color-text-light);
}

.blog-meta i {
    color: var(--color-red-primary);
    margin-right: 0.25rem;
}

.blog-categories {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: var(--spacing-sm);
}

.blog-category {
    background: var(--color-red-subtle);
    color: var(--color-red-primary);
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
}

.blog-content h3 {
    font-size: 1.375rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-dark);
}

.blog-content p {
    color: var(--color-text-gray);
    margin-bottom: var(--spacing-md);
    font-size: 0.9375rem;
    line-height: 1.6;
}

.blog-link {
    color: var(--color-red-primary);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9375rem;
}

.blog-link:hover {
    color: var(--color-red-dark);
}

/* ==========================================
   CERTIFICATIONS
   ========================================== */

.certifications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.certification-card {
    background: var(--color-white);
    border-radius: 8px;
    overflow: hidden;
    transition: var(--transition);
    border: 1px solid #e5e7eb;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
    display: flex;
    flex-direction: column;
}

.certification-card:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    transform: translateY(-4px);
}

.certification-image {
    width: 100%;
    height: 220px;
    background: var(--color-light-gray);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    position: relative;
}

.certification-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.certification-image i {
    font-size: 4rem;
    color: var(--color-text-light);
}

.certification-content {
    padding: 1.5rem;
    text-align: center;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.certification-category {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-red-primary);
    margin-bottom: 0.75rem;
}

.certification-card h3 {
    font-size: 1.125rem;
    margin-bottom: 0.5rem;
    color: var(--color-text-dark);
    font-weight: 600;
    line-height: 1.4;
}

.certification-issuer {
    color: #6b7280;
    font-weight: 400;
    font-size: 0.9375rem;
    margin-bottom: 0.5rem;
}

.certification-date {
    color: #9ca3af;
    font-size: 0.875rem;
    margin-bottom: 1.25rem;
}

.certification-link {
    color: var(--color-red-primary);
    font-weight: 600;
    font-size: 0.9375rem;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: auto;
    transition: var(--transition);
}

.certification-link:hover {
    color: var(--color-red-dark);
    gap: 0.75rem;
}

.certification-badge {
    position: absolute;
    top: 12px;
    right: 12px;
    background: var(--color-red-primary);
    color: white;
    padding: 0.375rem 0.75rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    z-index: 1;
}

/* ==========================================
   CONTACT SECTION
   ========================================== */

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--spacing-xl);
    align-items: start;
}

.contact-info h2 {
    color: var(--color-white);
}

.contact-info p {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.8;
    margin-bottom: var(--spacing-lg);
}

.contact-buttons {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.social-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: 0.875rem 1.5rem;
    border-radius: 4px;
    font-weight: 500;
    transition: var(--transition);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: var(--color-white);
    background: rgba(255, 255, 255, 0.05);
}

.social-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateX(4px);
}

.contact-form {
    background: rgba(255, 255, 255, 0.05);
    padding: var(--spacing-lg);
    border-radius: 4px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.875rem;
    border: 1px solid rgba(255, 255, 255, 0.2);
    background: rgba(255, 255, 255, 0.05);
    color: var(--color-white);
    border-radius: 4px;
    font-family: var(--font-sans);
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-red-primary);
    background: rgba(255, 255, 255, 0.08);
}

.form-group textarea {
    resize: vertical;
}

/* ==========================================
   FOOTER
   ========================================== */

.footer {
    background: var(--color-white);
    padding: var(--spacing-lg) 0;
    border-top: 1px solid var(--color-gray);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.footer-left p {
    color: var(--color-text-gray);
    font-size: 0.9375rem;
}

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

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

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

.footer-social {
    display: flex;
    gap: var(--spacing-sm);
}

.footer-social a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-light-gray);
    border-radius: 4px;
    color: var(--color-text-gray);
    transition: var(--transition);
}

.footer-social a:hover {
    background: var(--color-red-primary);
    color: var(--color-white);
}

/* ==========================================
   SCROLL TO TOP
   ========================================== */

.scroll-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    background: var(--color-red-primary);
    color: var(--color-white);
    border: none;
    border-radius: 4px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    box-shadow: var(--shadow-lg);
    transition: var(--transition);
    opacity: 0;
    visibility: hidden;
    z-index: 999;
}

.scroll-top.visible {
    opacity: 1;
    visibility: visible;
}

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

/* ==========================================
   REVEAL ANIMATIONS
   ========================================== */

.reveal-left,
.reveal-right,
.reveal-up {
    opacity: 0;
    transition: all 0.8s ease;
}

.reveal-left {
    transform: translateX(-50px);
}

.reveal-right {
    transform: translateX(50px);
}

.reveal-up {
    transform: translateY(50px);
}

.reveal-left.active,
.reveal-right.active,
.reveal-up.active {
    opacity: 1;
    transform: translate(0);
}

.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }
.delay-4 { transition-delay: 0.4s; }
.delay-5 { transition-delay: 0.5s; }

.fade-in {
    animation: fadeIn 1s ease-in forwards;
    opacity: 0;
}

.fade-in-delay-1 {
    animation: fadeIn 1s ease-in 0.2s forwards;
    opacity: 0;
}

.fade-in-delay-2 {
    animation: fadeIn 1s ease-in 0.4s forwards;
    opacity: 0;
}

.fade-in-delay-3 {
    animation: fadeIn 1s ease-in 0.6s forwards;
    opacity: 0;
}

.fade-in-delay-4 {
    animation: fadeIn 1s ease-in 0.8s forwards;
    opacity: 0;
}

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

/* ==========================================
   RESPONSIVE DESIGN
   ========================================== */

@media (max-width: 968px) {
    h1 { font-size: 3rem; }
    h2 { font-size: 2rem; }
    h3 { font-size: 1.5rem; }
    
    .hero-heading { font-size: 2.5rem; }
    .hero-text { max-width: 100%; }
    .hero-background { width: 100%; opacity: 0.3; }
    .section-title { font-size: 2rem; }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: rgba(255, 255, 255, 0.98);
        width: 100%;
        text-align: center;
        transition: var(--transition);
        box-shadow: var(--shadow-lg);
        padding: var(--spacing-md) 0;
        border-bottom: 1px solid var(--color-gray);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .hamburger {
        display: flex;
    }
    
    .hamburger.active span:nth-child(1) {
        transform: rotate(45deg) translate(8px, 8px);
    }
    
    .hamburger.active span:nth-child(2) {
        opacity: 0;
    }
    
    .hamburger.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }
    
    .about-content,
    .resume-content,
    .work-grid,
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .competencies-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .skills-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .portfolio-grid,
    .blog-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    h1 { font-size: 2.5rem; }
    h2 { font-size: 1.75rem; }
    
    .hero-heading { font-size: 2rem; }
    .hero-credentials { font-size: 1rem; }
    .section-title { font-size: 1.75rem; }
    
    .competencies-grid,
    .skills-grid {
        grid-template-columns: 1fr;
    }
    
    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }
    
    .btn {
        width: 100%;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
    
    .certifications-grid {
        grid-template-columns: 1fr;
    }
}