/* =============================================
   Professional Portfolio CSS
   Author: Portfolio Template
   Version: 1.0
   ============================================= */

/* =============================================
   CSS VARIABLES (Custom Properties)
   ============================================= */
:root {
    /* Light Mode Colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #e9ecef;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-tertiary: #9ca3af;
    --border-color: #e5e7eb;
    --accent-primary: #1e40af;
    --accent-hover: #1e3a8a;
    --accent-light: #dbeafe;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --card-bg: #ffffff;
    --input-bg: #ffffff;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    
    /* Typography */
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
    --font-mono: 'Courier New', Courier, monospace;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Borders */
    --border-radius-sm: 0.25rem;
    --border-radius-md: 0.5rem;
    --border-radius-lg: 1rem;
    
    /* Layout */
    --container-width: 1200px;
    --navbar-height: 70px;
}

/* Dark Mode Variables */
[data-theme="dark"] {
    --bg-primary: #111827;
    --bg-secondary: #1f2937;
    --bg-tertiary: #374151;
    --text-primary: #f9fafb;
    --text-secondary: #d1d5db;
    --text-tertiary: #9ca3af;
    --border-color: #374151;
    --accent-primary: #3b82f6;
    --accent-hover: #60a5fa;
    --accent-light: #1e40af;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.3);
    --card-bg: #1f2937;
    --input-bg: #374151;
}

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

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

body {
    font-family: var(--font-sans);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color var(--transition-normal), color var(--transition-normal);
    overflow-x: hidden;
}

/* =============================================
   TYPOGRAPHY
   ============================================= */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: var(--spacing-sm);
    color: var(--text-secondary);
}

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

a:hover {
    color: var(--accent-hover);
}

ul, ol {
    list-style: none;
}

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

/* =============================================
   LAYOUT UTILITIES
   ============================================= */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.section {
    padding: var(--spacing-2xl) 0;
}

.section-alt {
    background-color: var(--bg-secondary);
}

.section-title {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    font-size: 2.5rem;
}

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

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

/* =============================================
   GRID SYSTEM
   ============================================= */
.grid {
    display: grid;
    gap: var(--spacing-lg);
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-lg);
}

/* =============================================
   NAVIGATION
   ============================================= */
.navbar {
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-sm);
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: var(--navbar-height);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.logo i {
    color: var(--accent-primary);
}

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

.nav-link {
    color: var(--text-secondary);
    font-weight: 500;
    padding: var(--spacing-xs) 0;
    border-bottom: 2px solid transparent;
    transition: all var(--transition-fast);
    position: relative;
}

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

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

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

.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 0.25rem;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
}

.mobile-toggle span {
    display: block;
    width: 25px;
    height: 3px;
    background-color: var(--text-primary);
    transition: all var(--transition-fast);
    border-radius: var(--border-radius-sm);
}

.mobile-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.mobile-toggle.active span:nth-child(2) {
    opacity: 0;
}

.mobile-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

/* Theme Toggle Button */
.theme-toggle {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    width: 40px;
    height: 40px;
    border-radius: var(--border-radius-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease, transform 0.3s ease;
}

.theme-toggle:hover {
    background-color: var(--accent-primary);
    color: white;
    transform: rotate(20deg);
}

/* =============================================
   BUTTONS
   ============================================= */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    border: 2px solid transparent;
    border-radius: var(--border-radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-align: center;
    white-space: nowrap;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn i {
    transition: transform var(--transition-fast);
}

.btn:hover i {
    transform: translateX(3px);
}

.btn-primary {
    background-color: var(--accent-primary);
    color: white;
    position: relative;
    z-index: 1;
}

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

.btn-outline {
    background-color: transparent;
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    position: relative;
    z-index: 1;
}

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

.btn-block {
    width: 100%;
    justify-content: center;
}

/* =============================================
   HERO SECTION
   ============================================= */
.hero {
    padding: var(--spacing-2xl) 0;
    min-height: calc(100vh - var(--navbar-height));
    display: flex;
    align-items: center;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.hero-title {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

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

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.hero-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    line-height: 1.8;
}

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

/* =============================================
   CARDS
   ============================================= */
.card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--accent-primary);
    transform: translateX(-100%);
    transition: transform var(--transition-normal);
}

.card:hover::before {
    transform: translateX(0);
}

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

.card-icon {
    font-size: 3rem;
    color: var(--accent-primary);
    margin-bottom: var(--spacing-md);
    transition: transform var(--transition-normal);
}

.card:hover .card-icon {
    transform: scale(1.1) rotate(5deg);
}

.card-title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.card-subtitle {
    color: var(--text-secondary);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.card-date {
    color: var(--text-tertiary);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-sm);
}

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

/* =============================================
   PROJECT CARDS
   ============================================= */
.project-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    transition: all var(--transition-normal);
    position: relative;
}

.project-card::after {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    bottom: -50%;
    left: -50%;
    background: linear-gradient(to bottom, rgba(255,255,255,0) 0%, rgba(255,255,255,0.03) 100%);
    transform: rotate(45deg) translateX(-100%);
    transition: transform 0.6s;
}

.project-card:hover::after {
    transform: rotate(45deg) translateX(100%);
}

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

.project-image {
    background-color: var(--bg-secondary);
    padding: var(--spacing-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-tertiary);
    height: 200px;
}

.themed-preview-image {
    width: 100%;
    max-width: 520px;
}

.themed-preview-image img {
    width: 100%;
    height: 100%;
    max-height: 168px;
    object-fit: contain;
}

.themed-preview-image .preview-light {
    display: none;
}

.themed-preview-image .preview-dark {
    display: block;
}

html[data-theme='light'] .themed-preview-image .preview-light {
    display: block;
}

html[data-theme='light'] .themed-preview-image .preview-dark {
    display: none;
}

html[data-theme='dark'] .themed-preview-image .preview-dark {
    display: block;
}

html[data-theme='dark'] .themed-preview-image .preview-light {
    display: none;
}

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

.project-title {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.project-description {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.7;
}

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

.tag {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background-color: var(--accent-light);
    color: var(--accent-primary);
    border-radius: var(--border-radius-sm);
    font-size: 0.875rem;
    font-weight: 500;
    transition: all var(--transition-fast);
    cursor: default;
}

.tag:hover {
    transform: translateY(-2px) scale(1.05);
    box-shadow: 0 4px 8px rgba(30, 64, 175, 0.2);
}

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

.link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--accent-primary);
    font-weight: 500;
    transition: all var(--transition-fast);
    position: relative;
}

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

.link:hover::after {
    width: 100%;
}

.link:hover {
    color: var(--accent-hover);
    transform: translateX(3px);
}

.link i {
    transition: transform var(--transition-fast);
}

.link:hover i {
    transform: translateX(3px);
}

/* =============================================
   PAGE HEADER
   ============================================= */
.page-header {
    background-color: var(--bg-secondary);
    padding: var(--spacing-xl) 0;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

.page-title {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

.page-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
}

/* =============================================
   ABOUT PAGE
   ============================================= */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-xl);
    align-items: center;
}

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

.profile-placeholder {
    width: 300px;
    height: 300px;
    border-radius: 50%;
    background-color: var(--bg-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    border: 5px solid var(--accent-primary);
    color: var(--text-tertiary);
}

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

.about-content p {
    font-size: 1.125rem;
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
}

.about-actions {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
    flex-wrap: wrap;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
}

.stat {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background-color: var(--bg-secondary);
    border-radius: var(--border-radius-md);
}

.stat i {
    font-size: 2rem;
    color: var(--accent-primary);
}

.stat-content strong {
    display: block;
    font-size: 1.5rem;
    color: var(--text-primary);
}

.stat-content span {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* =============================================
   SKILLS SECTION
   ============================================= */
.skills-container {
    display: grid;
    gap: var(--spacing-lg);
}

.skill-category {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
}

.skill-category-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
    font-size: 1.25rem;
}

.skill-category-title i {
    color: var(--accent-primary);
}

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

.skill-tag {
    padding: 0.5rem 1rem;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    font-weight: 500;
    color: var(--text-primary);
    transition: all var(--transition-fast);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.skill-tag::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--accent-primary);
    transition: left var(--transition-normal);
}

.skill-tag:hover::before {
    left: 0;
}

.skill-tag span {
    position: relative;
    z-index: 1;
}

.skill-tag:hover {
    color: white;
    border-color: var(--accent-primary);
    transform: translateY(-2px);
}

/* =============================================
   TIMELINE
   ============================================= */
.timeline {
    position: relative;
    padding-left: var(--spacing-xl);
}

.timeline::before {
    content: '';
    position: absolute;
    left: 20px;
    top: 0;
    bottom: 0;
    width: 2px;
    background-color: var(--border-color);
}

.timeline-item {
    position: relative;
    margin-bottom: var(--spacing-xl);
    animation: fadeInLeft 0.6s ease-out both;
}

.timeline-item:nth-child(2) {
    animation-delay: 0.2s;
}

.timeline-item:nth-child(3) {
    animation-delay: 0.4s;
}

.timeline-icon {
    position: absolute;
    left: -35px;
    top: 0;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--accent-primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 0 4px var(--bg-primary);
    transition: all var(--transition-normal);
}

.timeline-item:hover .timeline-icon {
    transform: scale(1.2);
    box-shadow: 0 0 0 4px var(--bg-primary), 0 0 20px var(--accent-primary);
}

.timeline-content {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
}

.timeline-title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.timeline-company {
    color: var(--accent-primary);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.timeline-date {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--text-tertiary);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-sm);
}

.timeline-description {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* =============================================
   CERTIFICATION LIST
   ============================================= */
.certification-list {
    list-style: none;
}

.certification-list li {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) 0;
    color: var(--text-secondary);
}

.certification-list li i {
    color: var(--accent-primary);
}

/* =============================================
   CONTACT PAGE
   ============================================= */
.contact-main-section {
    padding-bottom: var(--spacing-lg);
}

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

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

.contact-form-container h2,
.contact-info h2 {
    margin-bottom: var(--spacing-md);
}

.contact-info p {
    margin-bottom: var(--spacing-lg);
}

/* Form Styles */
.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.form-group label {
    font-weight: 600;
    color: var(--text-primary);
}

.form-input,
.form-textarea {
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    background-color: var(--input-bg);
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 1rem;
    transition: all var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--accent-light);
}

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

/* Contact Methods */
.contact-methods {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

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

.method-icon {
    width: 50px;
    height: 50px;
    border-radius: var(--border-radius-md);
    background-color: var(--accent-light);
    color: var(--accent-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.method-content h3 {
    font-size: 1rem;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.method-content p,
.method-content a {
    color: var(--text-secondary);
}

/* Contact Social */
.contact-social {
    margin-top: var(--spacing-xl);
}

.contact-social h3 {
    margin-bottom: var(--spacing-md);
}

.social-links-large {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.social-link-large {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    flex: 0 0 auto;
    white-space: nowrap;
    padding: var(--spacing-md);
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    color: var(--text-primary);
    font-weight: 500;
    transition: all var(--transition-fast);
}

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

.social-link-large i {
    font-size: 1.25rem;
}

/* Map Placeholder */
.map-placeholder {
    background-color: var(--bg-tertiary);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-2xl);
    text-align: center;
    color: var(--text-tertiary);
}

.map-placeholder i {
    margin-bottom: var(--spacing-md);
}

.map-placeholder p {
    margin-bottom: var(--spacing-xs);
}

/* =============================================
   CTA BOX
   ============================================= */
.cta-box {
    background-color: var(--card-bg);
    border: 2px solid var(--accent-primary);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
}

.cta-box h2 {
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.cta-box p {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-lg);
    color: var(--text-secondary);
}

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

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

@media (max-width: 1024px) {
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
}

.footer-section h3,
.footer-section h4 {
    margin-bottom: var(--spacing-md);
}

.footer-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 1.25rem;
}

.footer-title i {
    color: var(--accent-primary);
}

.footer-heading {
    font-size: 1.125rem;
    color: var(--text-primary);
}

.footer-text {
    color: var(--text-secondary);
    line-height: 1.7;
}

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

.footer-links li a {
    color: var(--text-secondary);
    transition: all var(--transition-fast);
    display: inline-block;
    position: relative;
    padding-left: var(--spacing-sm);
}

.footer-links li a::before {
    content: '→';
    position: absolute;
    left: 0;
    opacity: 0;
    transition: all var(--transition-fast);
}

.footer-links li a:hover::before {
    opacity: 1;
}

.footer-links li a:hover {
    color: var(--accent-primary);
    transform: translateX(var(--spacing-xs));
}

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

.social-link {
    width: 40px;
    height: 40px;
    border-radius: var(--border-radius-md);
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-primary);
    transition: all var(--transition-fast);
    position: relative;
    overflow: hidden;
}

.social-link::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: var(--accent-primary);
    transform: translate(-50%, -50%);
    transition: width 0.4s, height 0.4s;
}

.social-link:hover::before {
    width: 100px;
    height: 100px;
}

.social-link i {
    position: relative;
    z-index: 1;
    transition: transform var(--transition-fast);
}

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

.social-link:hover i {
    transform: scale(1.2);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
}

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

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

/* Tablet */
@media (max-width: 768px) {
    :root {
        --navbar-height: 60px;
    }
    
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    h3 { font-size: 1.5rem; }
    
    .section {
        padding: var(--spacing-xl) 0;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    /* Navigation */
    .mobile-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: var(--navbar-height);
        flex-direction: column;
        background-color: var(--bg-primary);
        width: 100%;
        padding: var(--spacing-lg);
        box-shadow: var(--shadow-lg);
        transition: left var(--transition-normal);
        border-top: 1px solid var(--border-color);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-link {
        padding: var(--spacing-sm) 0;
        border-bottom: none;
        border-left: 3px solid transparent;
        padding-left: var(--spacing-sm);
    }
    
    .nav-link:hover,
    .nav-link.active {
        border-left-color: var(--accent-primary);
        border-bottom-color: transparent;
    }
    
    /* Hero */
    .hero {
        min-height: auto;
        padding: var(--spacing-xl) 0;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1.25rem;
    }
    
    .hero-description {
        font-size: 1rem;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .hero-buttons .btn {
        width: 100%;
    }
    
    /* Grids */
    .grid-2,
    .grid-3,
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    /* About */
    .about-grid {
        grid-template-columns: 1fr;
    }
    
    .profile-placeholder {
        width: 200px;
        height: 200px;
    }
    
    .about-stats {
        grid-template-columns: 1fr;
    }
    
    /* Timeline */
    .timeline {
        padding-left: var(--spacing-lg);
    }
    
    .timeline::before {
        left: 10px;
    }
    
    .timeline-icon {
        left: -25px;
        width: 30px;
        height: 30px;
        font-size: 0.875rem;
    }
    
    /* Contact */
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .social-links-large {
        grid-template-columns: 1fr;
    }
    
    /* Footer */
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
}

/* Mobile */
@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .page-title {
        font-size: 2rem;
    }
    
    .page-subtitle {
        font-size: 1rem;
    }
    
    .hero-title {
        font-size: 1.75rem;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    .profile-placeholder {
        width: 150px;
        height: 150px;
    }
    
    .profile-placeholder i {
        font-size: 3rem;
    }
    
    .btn {
        padding: 0.625rem 1.25rem;
        font-size: 0.875rem;
    }
    
    .card,
    .project-card,
    .timeline-content {
        padding: var(--spacing-md);
    }
}

/* Large Desktop */
@media (min-width: 1400px) {
    .container {
        max-width: 1320px;
    }
}

/* =============================================
   ANIMATIONS
   ============================================= */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

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

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

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

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

.hero-content,
.page-header {
    animation: fadeIn 0.6s ease-out;
}

.hero-title {
    animation: fadeInLeft 0.8s ease-out;
}

.hero-subtitle {
    animation: fadeInRight 0.8s ease-out 0.2s both;
}

.hero-description {
    animation: fadeIn 1s ease-out 0.4s both;
}

.hero-buttons {
    animation: slideInUp 1s ease-out 0.6s both;
}

/* Navbar scroll animation */
.navbar {
    animation: slideInUp 0.5s ease-out;
}

/* =============================================
   ACCESSIBILITY
   ============================================= */
*:focus {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
}

button:focus,
a:focus {
    outline-offset: 4px;
}

/* Reduced motion for users who prefer it */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.3s !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.3s !important;
    }
    
    html {
        scroll-behavior: auto;
    }
}

/* =============================================
   TECH HELP PAGE SPECIFIC STYLES
   ============================================= */
.tech-help-intro {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.lead-text {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--text-secondary);
}

.service-list {
    list-style: none;
    padding: 0;
    margin-top: var(--spacing-md);
}

.service-list li {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    padding: var(--spacing-xs) 0;
    color: var(--text-secondary);
}

.service-list li i {
    color: var(--accent-primary);
    margin-top: 0.25rem;
    flex-shrink: 0;
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.step-card {
    text-align: center;
    padding: var(--spacing-lg);
}

.step-number {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background-color: var(--accent-primary);
    color: white;
    font-size: 1.5rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-md);
    transition: all var(--transition-normal);
    position: relative;
}

.step-number::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: 50%;
    border: 2px solid var(--accent-primary);
    animation: pulse 2s infinite;
}

.step-card:hover .step-number {
    transform: scale(1.1);
    box-shadow: 0 0 20px rgba(30, 64, 175, 0.5);
}

.step-title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.step-description {
    color: var(--text-secondary);
    line-height: 1.7;
}

.service-option-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
}

.option-icon {
    font-size: 3rem;
    color: var(--accent-primary);
    margin-bottom: var(--spacing-md);
}

.service-option-card h3 {
    margin-bottom: var(--spacing-md);
}

.service-option-card p {
    margin-bottom: var(--spacing-lg);
}

.testimonial-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    text-align: center;
}

.testimonial-stars {
    color: #fbbf24;
    margin-bottom: var(--spacing-md);
    font-size: 1.25rem;
}

.testimonial-text {
    font-style: italic;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.7;
}

.testimonial-author {
    font-weight: 600;
    color: var(--text-primary);
}

.cta-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
    margin-top: var(--spacing-lg);
}

/* =============================================
   FEATURED PROJECT BADGE
   ============================================= */
.featured-project {
    border: 2px solid var(--accent-primary);
}

.featured-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    background-color: var(--accent-primary);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: var(--border-radius-sm);
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.footer-section i {
    margin-right: var(--spacing-xs);
}

/* =============================================
   404 ERROR PAGE
   ============================================= */
.error-404 {
    min-height: calc(100vh - var(--navbar-height) - 300px);
    display: flex;
    align-items: center;
    padding: var(--spacing-2xl) 0;
}

.error-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.error-icon {
    font-size: 5rem;
    color: var(--accent-primary);
    margin-bottom: var(--spacing-md);
}

.error-code {
    font-size: 8rem;
    font-weight: 700;
    color: var(--accent-primary);
    line-height: 1;
    margin-bottom: var(--spacing-sm);
}

.error-title {
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.error-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    line-height: 1.7;
}

.error-actions {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: var(--spacing-2xl);
}

.error-suggestions {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

.error-suggestions h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
}

.suggestion-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: var(--spacing-md);
}

.suggestion-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-md);
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

.suggestion-link:hover {
    background-color: var(--accent-primary);
    color: white;
    border-color: var(--accent-primary);
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.suggestion-link i {
    font-size: 1.5rem;
}

.suggestion-link span {
    font-size: 0.875rem;
    font-weight: 500;
}

/* =============================================
   FOOTER ADJUSTMENTS
   ============================================= */
.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

@media (max-width: 768px) {
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .error-code {
        font-size: 5rem;
    }
    
    .error-title {
        font-size: 1.5rem;
    }
    
    .suggestion-links {
        grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    }
}

/* =============================================
   BLOG STYLES
   ============================================= */

.blog-search-section {
    padding: var(--spacing-md) 0;
}

.search-box {
    position: relative;
    max-width: 600px;
    margin: 0 auto;
}

.search-box i {
    position: absolute;
    left: var(--spacing-md);
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
    pointer-events: none;
}

.search-input {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-md) var(--spacing-md) calc(var(--spacing-md) * 3);
    background-color: var(--card-bg);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-md);
    font-size: 1rem;
    color: var(--text-primary);
    transition: all var(--transition);
}

.search-input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(30, 64, 175, 0.1);
}

.search-results-count {
    text-align: center;
    margin-top: var(--spacing-md);
    color: var(--text-secondary);
    font-size: 0.9rem;
    display: none;
}

.highlight {
    background-color: rgba(30, 64, 175, 0.2);
    padding: 0.1rem 0.2rem;
    border-radius: 2px;
    font-weight: 600;
}

.loading {
    text-align: center;
    color: var(--text-secondary);
    padding: var(--spacing-xl);
}

/* Blog Article Styles */
.article-content {
    background: var(--card-bg);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    margin-bottom: var(--spacing-xl);
}

.article-header {
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-lg);
    border-bottom: 2px solid var(--accent-primary);
}

.article-header h1 {
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    font-size: 2.5rem;
}

.article-meta {
    display: flex;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.article-meta span {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-xl);
    color: var(--accent-primary);
    text-decoration: none;
    font-weight: 500;
    transition: all var(--transition);
}

.back-link:hover {
    transform: translateX(-4px);
}

.article-body {
    line-height: 1.8;
    color: var(--text-primary);
}

.article-body h2 {
    color: var(--text-primary);
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
    font-size: 1.75rem;
}

.article-body h3 {
    color: var(--text-primary);
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
    font-size: 1.35rem;
}

.article-body p {
    margin-bottom: var(--spacing-md);
}

.article-body ul,
.article-body ol {
    margin-bottom: var(--spacing-md);
    padding-left: var(--spacing-xl);
}

.article-body li {
    margin-bottom: var(--spacing-xs);
}

.article-body code {
    background: var(--bg-secondary);
    padding: 0.2rem 0.5rem;
    border-radius: 3px;
    font-family: 'Courier New', 'Consolas', monospace;
    font-size: 0.9em;
    color: var(--accent-primary);
}

.article-body pre {
    background: var(--bg-secondary);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-md);
    overflow-x: auto;
    margin: var(--spacing-lg) 0;
    border-left: 4px solid var(--accent-primary);
}

.article-body pre code {
    background: none;
    padding: 0;
    color: var(--text-primary);
}

.article-body blockquote {
    border-left: 4px solid var(--accent-primary);
    padding-left: var(--spacing-lg);
    margin: var(--spacing-lg) 0;
    font-style: italic;
    color: var(--text-secondary);
}

.article-body img {
    max-width: 100%;
    height: auto;
    border-radius: var(--border-radius-md);
    margin: var(--spacing-lg) 0;
}

.article-body a {
    color: var(--accent-primary);
    text-decoration: underline;
}

.article-body a:hover {
    color: var(--accent-hover);
}

/* =============================================
   PRINT STYLES
   ============================================= */
@media print {
    .navbar,
    .theme-toggle,
    .mobile-toggle,
    .hero-buttons,
    .project-links,
    .cta-box,
    .footer {
        display: none;
    }
    
    body {
        font-size: 12pt;
        color: #000;
        background: #fff;
    }
    
    a {
        text-decoration: underline;
    }
}