/* ===== ENHANCED PORTFOLIO STYLES ===== */

/* === ROOT VARIABLES === */
:root {
    /* Modern Color Palette */
    --primary-color: #0891b2; /* Teal/Sky Blue Accent */
    --primary-dark: #0e7490;
    --primary-light: #22d3ee;
    --secondary-color: #6366f1;
    --accent-color: #f97316;
    
    /* Neutral Colors */
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --text-white: #ffffff;
    --background-primary: #ffffff;
    --background-secondary: #f8fafc;
    --background-tertiary: #f1f5f9;
    --border-color: #e2e8f0;
    --shadow-light: rgba(0, 0, 0, 0.05);
    --shadow-medium: rgba(0, 0, 0, 0.1);
    --shadow-strong: rgba(0, 0, 0, 0.15);
    
    /* Dark Theme Colors */
    --dark-bg-primary: #0f172a;
    --dark-bg-secondary: #1e293b;
    --dark-bg-tertiary: #334155;
    --dark-text-primary: #f8fafc;
    --dark-text-secondary: #cbd5e1;
    --dark-text-muted: #94a3b8;
    --dark-border: #334155;
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    --font-size-6xl: 3.75rem;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 2.5rem;
    --spacing-3xl: 3rem;
    --spacing-4xl: 4rem;
    --spacing-5xl: 5rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 50%;
    
    /* Transitions */
    --transition-fast: 0.15s ease-out;
    --transition-normal: 0.3s ease-out;
    --transition-slow: 0.5s ease-out;
    
    /* Z-Index */
    --z-dropdown: 1000;
    --z-modal: 1050;
    --z-tooltip: 1060;
}

/* Dark Theme */
[data-theme="dark"] {
    --text-primary: var(--dark-text-primary);
    --text-secondary: var(--dark-text-secondary);
    --text-muted: var(--dark-text-muted);
    --background-primary: var(--dark-bg-primary);
    --background-secondary: var(--dark-bg-secondary);
    --background-tertiary: var(--dark-bg-tertiary);
    --border-color: var(--dark-border);
    --shadow-light: rgba(0, 0, 0, 0.3);
    --shadow-medium: rgba(0, 0, 0, 0.4);
    --shadow-strong: rgba(0, 0, 0, 0.5);
}

/* === RESET & BASE STYLES === */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: var(--font-primary);
    font-size: var(--font-size-base);
    line-height: 1.7;
    color: var(--text-primary);
    background: var(--background-primary);
    transition: background-color var(--transition-normal), color var(--transition-normal);
    overflow-x: hidden;
}

/* === LOADING ANIMATION === */
.loader-wrapper {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity var(--transition-slow), visibility var(--transition-slow);
}

.loader-wrapper.hidden {
    opacity: 0;
    visibility: hidden;
}

.loader {
    text-align: center;
    color: white;
}

.loader-chart {
    font-size: 4rem;
    margin-bottom: var(--spacing-lg);
    animation: pulse 2s infinite ease-in-out;
}

.loader-text {
    font-size: var(--font-size-lg);
    font-weight: 500;
    animation: fadeInOut 2s infinite ease-in-out;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.1); opacity: 0.7; }
}

@keyframes fadeInOut {
    0%, 100% { opacity: 0.7; }
    50% { opacity: 1; }
}

/* === NAVIGATION === */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: var(--z-dropdown);
    transition: all var(--transition-normal);
}

[data-theme="dark"] .navbar {
    background: rgba(15, 23, 42, 0.95);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 4px 20px var(--shadow-light);
}

[data-theme="dark"] .navbar.scrolled {
    background: rgba(15, 23, 42, 0.98);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.nav-logo a {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

.nav-menu {
    display: flex;
    gap: var(--spacing-2xl);
    list-style: none;
}

.nav-link {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    position: relative;
    transition: color var(--transition-fast);
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width var(--transition-normal);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.theme-toggle {
    background: none;
    border: 2px solid var(--border-color);
    color: var(--text-primary);
    width: 44px;
    height: 44px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-normal);
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
}

.nav-toggle .bar {
    width: 24px;
    height: 3px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all var(--transition-normal);
}

.nav-toggle.active .bar:nth-child(1) {
    transform: rotate(45deg) translate(8px, 8px);
}

.nav-toggle.active .bar:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active .bar:nth-child(3) {
    transform: rotate(-45deg) translate(8px, -8px);
}

/* === HERO SECTION === */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    background: linear-gradient(135deg, 
        rgba(8, 145, 178, 0.05) 0%, 
        rgba(99, 102, 241, 0.05) 50%, 
        rgba(249, 115, 22, 0.05) 100%);
    overflow: hidden;
}

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

.floating-shapes {
    position: absolute;
    width: 100%;
    height: 100%;
}

.shape {
    position: absolute;
    border-radius: var(--radius-xl);
    background: linear-gradient(45deg, var(--primary-light), var(--secondary-color));
    opacity: 0.1;
    animation: float 15s infinite ease-in-out;
}

.shape-1 {
    width: 100px;
    height: 100px;
    top: 20%;
    left: 10%;
    animation-delay: 0s;
}

.shape-2 {
    width: 150px;
    height: 150px;
    top: 60%;
    right: 10%;
    animation-delay: 5s;
}

.shape-3 {
    width: 80px;
    height: 80px;
    bottom: 20%;
    left: 20%;
    animation-delay: 10s;
}

.shape-4 {
    width: 120px;
    height: 120px;
    top: 40%;
    right: 30%;
    animation-delay: 7s;
}

@keyframes float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    33% { transform: translateY(-30px) rotate(120deg); }
    66% { transform: translateY(30px) rotate(240deg); }
}

.hero-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
    position: relative;
    z-index: 1;
}

.hero-content {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: var(--spacing-5xl);
    align-items: center;
    min-height: 600px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: 600;
    margin-bottom: var(--spacing-xl);
    animation: glow 2s infinite ease-in-out alternate;
}

@keyframes glow {
    from { box-shadow: 0 0 20px rgba(8, 145, 178, 0.3); }
    to { box-shadow: 0 0 30px rgba(8, 145, 178, 0.6); }
}

.hero-title {
    font-size: var(--font-size-6xl);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
}

.highlight-text {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    position: relative;
}

.typing-animation::after {
    content: '|';
    animation: blink 1s infinite;
    color: var(--primary-color);
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

.hero-description {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-2xl);
    line-height: 1.8;
}

.hero-certifications {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-2xl);
}

.cert-badge {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: var(--background-secondary);
    border: 1px solid var(--border-color);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--text-primary);
    transition: all var(--transition-normal);
}

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

.hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-3xl);
}

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

.stat-number {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--primary-color);
    display: block;
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    font-weight: 500;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

/* === BUTTON STYLES === */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-base);
    font-weight: 600;
    text-decoration: none;
    border: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(8, 145, 178, 0.3);
}

.btn-resume {
    background: linear-gradient(135deg, var(--secondary-color), var(--accent-color));
    color: white;
}

.btn-resume:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.3);
}

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

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

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

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

/* Button Effect Classes */
.glow-effect {
    animation: buttonGlow 3s infinite ease-in-out;
}

@keyframes buttonGlow {
    0%, 100% { box-shadow: 0 4px 15px rgba(8, 145, 178, 0.3); }
    50% { box-shadow: 0 8px 25px rgba(8, 145, 178, 0.5); }
}

.pulse-effect {
    animation: pulse 2s infinite;
}

.hover-slide:hover {
    transform: translateX(5px);
}

/* === HERO VISUAL === */
.profile-container {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.profile-card {
    background: var(--background-primary);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-xl);
    box-shadow: 0 20px 40px var(--shadow-medium);
    border: 1px solid var(--border-color);
    text-align: center;
    position: relative;
    z-index: 2;
    transition: all var(--transition-slow);
}

.floating-element {
    animation: floatProfile 6s infinite ease-in-out;
}

@keyframes floatProfile {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.profile-img-wrapper {
    position: relative;
    margin-bottom: var(--spacing-lg);
}

.profile-img {
    width: 200px;
    height: 200px;
    border-radius: var(--radius-full);
    object-fit: cover;
    border: 4px solid var(--primary-color);
    transition: all var(--transition-normal);
}

.profile-img:hover {
    transform: scale(1.05);
    border-color: var(--secondary-color);
}

.profile-overlay {
    position: absolute;
    top: 10px;
    right: 10px;
}

.profile-badge {
    background: linear-gradient(135deg, var(--accent-color), var(--primary-color));
    color: white;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-md);
    font-size: var(--font-size-xs);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.pulse-badge {
    animation: pulse 2s infinite;
}

.profile-info h3 {
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
    font-size: var(--font-size-xl);
    font-weight: 600;
}

.profile-info p {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-xs);
}

.profile-status {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.status-dot {
    width: 8px;
    height: 8px;
    background: #10b981;
    border-radius: var(--radius-full);
    animation: statusPulse 2s infinite;
}

@keyframes statusPulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.floating-elements {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
}

.floating-card {
    position: absolute;
    background: linear-gradient(135deg, var(--background-secondary), var(--background-primary));
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm) var(--spacing-md);
    box-shadow: 0 4px 12px var(--shadow-light);
    backdrop-filter: blur(10px);
    transition: all var(--transition-normal);
    min-width: 80px;
    text-align: center;
}

.floating-card:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 6px 18px var(--shadow-medium);
    border-color: var(--primary-color);
}

.floating-card-1 {
    top: 20%;
    left: -20px;
    animation: floatCard1 8s infinite ease-in-out;
}

.floating-card-2 {
    top: 10%;
    right: -30px;
    animation: floatCard2 10s infinite ease-in-out;
}

.floating-card-3 {
    bottom: 30%;
    left: -30px;
    animation: floatCard3 9s infinite ease-in-out;
}

.floating-card-4 {
    bottom: 20%;
    right: -20px;
    animation: floatCard4 7s infinite ease-in-out;
}

@keyframes floatCard1 {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(2deg); }
}

@keyframes floatCard2 {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(15px) rotate(-2deg); }
}

@keyframes floatCard3 {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-15px) rotate(1deg); }
}

@keyframes floatCard4 {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(20px) rotate(-1deg); }
}

.floating-card span {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text-primary);
    text-align: center;
    line-height: 1.2;
}

/* === RECOMMENDATION SECTION === */
.recommendation {
    padding: var(--spacing-5xl) 0;
    background: var(--background-secondary);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-5xl);
}

.section-title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.section-subtitle {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
}

.testimonial-slider {
    position: relative;
    max-width: 1000px;
    margin: 0 auto;
}

.testimonial-container {
    position: relative;
    overflow: hidden;
    border-radius: var(--radius-2xl);
}

.testimonial-slide {
    display: none;
    animation: slideIn 0.5s ease-out;
}

.testimonial-slide.active {
    display: block;
}

@keyframes slideIn {
    from { opacity: 0; transform: translateX(30px); }
    to { opacity: 1; transform: translateX(0); }
}

.recommendation-card {
    background: var(--background-primary);
    padding: var(--spacing-3xl);
    border-radius: var(--radius-2xl);
    box-shadow: 0 20px 40px var(--shadow-light);
    border: 1px solid var(--border-color);
    display: flex;
    gap: var(--spacing-2xl);
    align-items: flex-start;
}

.recommender-photo {
    position: relative;
    flex-shrink: 0;
}

.photo-placeholder {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: var(--font-size-2xl);
}

.linkedin-verified {
    position: absolute;
    bottom: -5px;
    right: -5px;
    width: 28px;
    height: 28px;
    background: #0077b5;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: var(--font-size-sm);
    border: 3px solid var(--background-primary);
}

.quote-content {
    flex: 1;
}

.quote-icon {
    font-size: var(--font-size-3xl);
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
    opacity: 0.7;
}

.recommendation-text {
    font-size: var(--font-size-lg);
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-2xl);
    font-style: italic;
}

.recommender-info {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    gap: var(--spacing-xl);
}

.recommender-details h4 {
    color: var(--text-primary);
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.recommender-details p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.recommendation-date {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--text-muted);
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-md);
}

.recommendation-skills {
    display: flex;
    gap: var(--spacing-xs);
    flex-wrap: wrap;
}

.skill-tag {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-md);
    font-size: var(--font-size-xs);
    font-weight: 500;
}

.linkedin-badge {
    text-align: center;
    background: var(--background-secondary);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
}

.linkedin-badge i {
    color: #0077b5;
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-xs);
}

.linkedin-badge span {
    display: block;
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
}

.credibility-score .stars {
    display: flex;
    gap: 2px;
    justify-content: center;
}

.credibility-score .stars i {
    color: #fbbf24;
    font-size: var(--font-size-sm);
}

.testimonial-nav {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
}

.nav-dot {
    width: 12px;
    height: 12px;
    border-radius: var(--radius-full);
    background: var(--border-color);
    border: none;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.nav-dot.active,
.nav-dot:hover {
    background: var(--primary-color);
    transform: scale(1.2);
}

.slider-controls {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 100%;
    display: flex;
    justify-content: space-between;
    pointer-events: none;
}

.slider-btn {
    background: var(--background-primary);
    border: 1px solid var(--border-color);
    width: 48px;
    height: 48px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-primary);
    cursor: pointer;
    pointer-events: all;
    transition: all var(--transition-normal);
    box-shadow: 0 4px 12px var(--shadow-light);
}

.slider-btn:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    transform: scale(1.1);
}

.prev-btn {
    transform: translateX(-24px);
}

.next-btn {
    transform: translateX(24px);
}

/* === ABOUT SECTION === */
.about {
    padding: var(--spacing-5xl) 0;
    background: var(--background-primary);
}

.about-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
}

.about-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-5xl);
    margin-top: var(--spacing-4xl);
}

.about-intro-card {
    background: var(--background-secondary);
    padding: var(--spacing-3xl);
    border-radius: var(--radius-2xl);
    border: 1px solid var(--border-color);
    margin-bottom: var(--spacing-3xl);
    text-align: center;
}

.card-icon {
    font-size: var(--font-size-4xl);
    color: var(--primary-color);
    margin-bottom: var(--spacing-lg);
}

.about-intro-card h3 {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
}

.about-intro-card p {
    font-size: var(--font-size-lg);
    line-height: 1.8;
    color: var(--text-secondary);
}

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

.expertise-card {
    background: var(--background-primary);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    text-align: center;
    transition: all var(--transition-normal);
    box-shadow: 0 4px 12px var(--shadow-light);
}

.expertise-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 25px var(--shadow-medium);
    border-color: var(--primary-color);
}

.expertise-icon {
    font-size: var(--font-size-3xl);
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
}

.expertise-card h4 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.expertise-card p {
    color: var(--text-secondary);
    line-height: 1.7;
}

.about-sidebar {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2xl);
}

.stats-card,
.education-card {
    background: var(--background-secondary);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 12px var(--shadow-light);
}

.stats-card h3,
.education-card h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

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

.stat-item {
    text-align: center;
    padding: var(--spacing-md);
    background: var(--background-primary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
}

.stat-item .stat-number {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--primary-color);
    display: block;
    margin-bottom: var(--spacing-xs);
}

.stat-item .stat-label {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    font-weight: 500;
}

.education-item {
    display: flex;
    gap: var(--spacing-lg);
    align-items: flex-start;
}

.education-icon {
    font-size: var(--font-size-2xl);
    color: var(--primary-color);
    margin-top: var(--spacing-xs);
}

.education-details h4 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.education-details p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
}

.education-school {
    font-weight: 500;
    color: var(--primary-color);
}

.education-date {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
}

/* === EXPERIENCE SECTION === */
.experience {
    padding: var(--spacing-5xl) 0;
    background: var(--background-secondary);
}

.experience-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-3xl);
    margin-top: var(--spacing-4xl);
}

.experience-item {
    background: var(--background-primary);
    padding: var(--spacing-3xl);
    border-radius: var(--radius-2xl);
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 12px var(--shadow-light);
    transition: all var(--transition-normal);
    position: relative;
}

.experience-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: var(--radius-sm) 0 0 var(--radius-sm);
}

.experience-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 25px var(--shadow-medium);
}

.experience-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.experience-header h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--text-primary);
}

.company-location h4 {
    font-size: var(--font-size-lg);
    color: var(--primary-color);
    font-weight: 500;
    margin-bottom: var(--spacing-xs);
}

.location {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
}

.duration {
    background: var(--background-secondary);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.experience-description ul {
    list-style: none;
    padding: 0;
}

.experience-description li {
    position: relative;
    padding-left: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
    color: var(--text-secondary);
    line-height: 1.7;
}

.experience-description li::before {
    content: '▶';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-size: var(--font-size-sm);
}

/* === SKILLS SECTION === */
.skills {
    padding: var(--spacing-5xl) 0;
    background: var(--background-primary);
}

.skills .section-title {
    text-align: center;
    margin-bottom: var(--spacing-4xl);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-2xl);
}

.skill-category {
    background: var(--background-secondary);
    padding: var(--spacing-3xl);
    border-radius: var(--radius-2xl);
    border: 1px solid var(--border-color);
    text-align: center;
    transition: all var(--transition-normal);
    box-shadow: 0 4px 12px var(--shadow-light);
}

.skill-category:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 25px var(--shadow-medium);
    border-color: var(--primary-color);
}

.skill-category .skill-icon {
    font-size: var(--font-size-4xl);
    color: var(--primary-color);
    margin-bottom: var(--spacing-lg);
}

.skill-category h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xl);
}

.skill-items {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    justify-content: center;
}

.skill-item {
    background: var(--background-primary);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    font-size: var(--font-size-sm);
    font-weight: 500;
    transition: all var(--transition-normal);
    cursor: default;
}

.skill-item.expert {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    border-color: var(--primary-color);
}

.skill-item.intermediate {
    background: var(--background-tertiary);
    color: var(--text-primary);
    border-color: var(--primary-light);
}

.skill-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px var(--shadow-light);
}

/* === PROJECTS SECTION === */
.projects {
    padding: var(--spacing-5xl) 0;
    background: var(--background-secondary);
}

.projects-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
}

.projects-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-3xl);
    margin-top: var(--spacing-4xl);
}

.project-card {
    background: var(--background-primary);
    border-radius: var(--radius-2xl);
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 12px var(--shadow-light);
    overflow: hidden;
    transition: all var(--transition-normal);
}

.project-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 25px var(--shadow-medium);
}

.featured-project {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
}

.project-image {
    position: relative;
    overflow: hidden;
}

.project-screenshot {
    width: 100%;
    height: 250px;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.project-card:hover .project-screenshot {
    transform: scale(1.05);
}

.project-overlay {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
}

.project-badge,
.project-type {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-md);
    font-size: var(--font-size-xs);
    font-weight: 600;
}

.project-content {
    padding: var(--spacing-2xl);
}

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

.project-header h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--text-primary);
}

.project-category {
    background: var(--background-secondary);
    color: var(--text-secondary);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-md);
    font-size: var(--font-size-xs);
    font-weight: 500;
}

.project-content p {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-lg);
}

.project-highlights {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
}

.highlight-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    background: var(--background-secondary);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

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

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-lg);
}

.tech-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-md);
    font-size: var(--font-size-xs);
    font-weight: 500;
}

.tech-secondary {
    background: var(--background-secondary);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-md);
    font-size: var(--font-size-xs);
    font-weight: 500;
}

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

.project-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--primary-color);
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
    font-size: var(--font-size-sm);
}

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

.projects-cta {
    text-align: center;
    margin-top: var(--spacing-4xl);
    padding: var(--spacing-3xl);
    background: var(--background-primary);
    border-radius: var(--radius-2xl);
    border: 1px solid var(--border-color);
}

.projects-cta p {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
}

.btn-outline-large {
    padding: var(--spacing-lg) var(--spacing-2xl);
    font-size: var(--font-size-lg);
}

/* === CONTACT SECTION === */
.contact {
    padding: var(--spacing-5xl) 0;
    background: var(--background-primary);
}

.contact .section-title {
    text-align: center;
    margin-bottom: var(--spacing-4xl);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-5xl);
    max-width: 1200px;
    margin: 0 auto;
}

.contact-info h3 {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
}

.contact-info p {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-2xl);
}

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

.contact-method {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: var(--background-secondary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

.contact-method:hover {
    background: var(--primary-color);
    color: white;
    transform: translateX(4px);
}

.contact-method i {
    font-size: var(--font-size-lg);
    color: var(--primary-color);
}

.contact-method:hover i {
    color: white;
}

.contact-form {
    background: var(--background-secondary);
    padding: var(--spacing-3xl);
    border-radius: var(--radius-2xl);
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 12px var(--shadow-light);
}

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

.form-group label {
    display: block;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--background-primary);
    color: var(--text-primary);
    font-size: var(--font-size-base);
    transition: all var(--transition-normal);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(8, 145, 178, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.field-error {
    color: #ef4444;
    font-size: var(--font-size-sm);
    margin-top: var(--spacing-xs);
}

.form-group input.error,
.form-group textarea.error {
    border-color: #ef4444;
}

/* === FOOTER === */
.footer {
    background: var(--background-tertiary);
    padding: var(--spacing-4xl) 0 var(--spacing-2xl);
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-3xl);
}

.footer-main {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-4xl);
}

.footer-brand h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

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

.footer-links {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-2xl);
}

.footer-section h4 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
}

.footer-section ul {
    list-style: none;
}

.footer-section li {
    margin-bottom: var(--spacing-sm);
}

.footer-section a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-2xl);
    border-top: 1px solid var(--border-color);
}

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

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

.social-link {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: var(--background-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    color: var(--text-secondary);
    text-decoration: none;
    transition: all var(--transition-normal);
}

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

.social-tooltip {
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--text-primary);
    color: var(--background-primary);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    margin-bottom: var(--spacing-xs);
}

.social-link:hover .social-tooltip {
    opacity: 1;
    visibility: visible;
}

/* === CONTAINER & SECTION UTILITIES === */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
}

section {
    padding: var(--spacing-5xl) 0;
}

/* === BACK TO TOP === */
.back-to-top {
    position: fixed;
    bottom: var(--spacing-xl);
    right: var(--spacing-xl);
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    z-index: var(--z-tooltip);
    box-shadow: 0 4px 12px rgba(8, 145, 178, 0.3);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(8, 145, 178, 0.4);
}

/* === NOTIFICATION === */
.notification {
    position: fixed;
    top: var(--spacing-xl);
    right: var(--spacing-xl);
    background: linear-gradient(135deg, #10b981, #059669);
    color: white;
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: 0 8px 25px rgba(16, 185, 129, 0.3);
    transform: translateX(100%);
    transition: transform var(--transition-normal);
    z-index: var(--z-tooltip);
}

.notification.show {
    transform: translateX(0);
}

.notification-content {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.notification i {
    font-size: var(--font-size-lg);
}

/* === RESPONSIVE DESIGN === */
@media (max-width: 1200px) {
    .hero-content {
        gap: var(--spacing-3xl);
    }
    
    .floating-card-1,
    .floating-card-2,
    .floating-card-3,
    .floating-card-4 {
        display: none;
    }

    .about-grid,
    .contact-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-3xl);
    }

    .featured-project {
        grid-template-columns: 1fr;
    }

    .project-image {
        order: -1;
    }

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

    .footer-main {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }
}

@media (max-width: 968px) {
    .nav-menu {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 280px;
        height: calc(100vh - 80px);
        background: var(--background-primary);
        border-right: 1px solid var(--border-color);
        flex-direction: column;
        align-items: flex-start;
        padding: var(--spacing-2xl);
        gap: var(--spacing-lg);
        transition: left var(--transition-normal);
        box-shadow: 4px 0 20px var(--shadow-light);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-3xl);
        text-align: center;
    }
    
    .hero-title {
        font-size: var(--font-size-4xl);
    }
    
    .hero-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-lg);
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .recommendation-card {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-xl);
    }
    
    .recommender-info {
        flex-direction: column;
        align-items: center;
        gap: var(--spacing-lg);
    }
    
    .slider-controls {
        display: none;
    }

    .about-container,
    .projects-container {
        padding: 0 var(--spacing-lg);
    }

    .about-intro-card,
    .skill-category,
    .project-card,
    .contact-form {
        padding: var(--spacing-xl);
    }

    .stats-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }

    .skills-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }

    .experience-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }

    .contact-methods {
        gap: var(--spacing-md);
    }

    .footer-links {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

    .footer-bottom {
        flex-direction: column;
        gap: var(--spacing-lg);
        text-align: center;
    }
}

@media (max-width: 640px) {
    .nav-container {
        padding: 0 var(--spacing-md);
    }
    
    .hero-container,
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .hero-title {
        font-size: var(--font-size-3xl);
    }
    
    .hero-stats {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
        max-width: 280px;
    }
    
    .hero-certifications {
        flex-direction: column;
        align-items: center;
    }
    
    .recommendation-card {
        padding: var(--spacing-xl);
    }
    
    .back-to-top {
        bottom: var(--spacing-md);
        right: var(--spacing-md);
    }
    
    .notification {
        top: var(--spacing-md);
        right: var(--spacing-md);
        left: var(--spacing-md);
        transform: translateY(-100%);
    }
    
    .notification.show {
        transform: translateY(0);
    }

    .about-container,
    .projects-container {
        padding: 0 var(--spacing-md);
    }

    .about-intro-card,
    .skill-category,
    .project-card,
    .contact-form,
    .experience-item {
        padding: var(--spacing-lg);
    }

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

    .project-tech,
    .project-highlights {
        flex-direction: column;
        gap: var(--spacing-xs);
    }

    .project-links {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .project-link {
        justify-content: center;
    }

    .social-links {
        justify-content: center;
        flex-wrap: wrap;
    }

    .contact-method {
        padding: var(--spacing-md);
    }
}

/* === ACCESSIBILITY === */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .floating-element,
    .floating-card,
    .shape {
        animation: none;
    }
}

/* Focus styles for keyboard navigation */
a:focus,
button:focus,
input:focus,
textarea:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --shadow-light: rgba(0, 0, 0, 0.3);
        --shadow-medium: rgba(0, 0, 0, 0.5);
        --shadow-strong: rgba(0, 0, 0, 0.7);
    }
}

/* Additional sections styles will be added here as we continue... */