/* ===============================================
   HASAN'S PORTFOLIO - MAIN STYLESHEET
   Design System: Deep Blue, Emerald Green, Light Gray
   Fonts: Montserrat (headings), Roboto (body)
   =============================================== */

/* ===============================================
   1. CSS VARIABLES & RESET
   =============================================== */

:root {
    /* Colors */
    --primary-color: #1E3A8A;
    --primary-light: #3B82F6;
    --primary-dark: #1E40AF;
    --secondary-color: #10B981;
    --secondary-light: #34D399;
    --secondary-dark: #059669;
    --accent-color: #F59E0B;
    
    /* Grays */
    --gray-50: #F9FAFB;
    --gray-100: #F3F4F6;
    --gray-200: #E5E7EB;
    --gray-300: #D1D5DB;
    --gray-400: #9CA3AF;
    --gray-500: #6B7280;
    --gray-600: #4B5563;
    --gray-700: #374151;
    --gray-800: #1F2937;
    --gray-900: #111827;
    
    /* Text Colors */
    --text-primary: #1F2937;
    --text-secondary: #4B5563;
    --text-light: #6B7280;
    
    /* Background */
    --bg-primary: #FFFFFF;
    --bg-secondary: #F9FAFB;
    --bg-dark: #1F2937;
    
    /* Fonts */
    --font-heading: 'Montserrat', sans-serif;
    --font-body: 'Roboto', sans-serif;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s 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);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
}

/* Dark Mode Variables */
[data-theme="dark"] {
    --text-primary: #F9FAFB;
    --text-secondary: #E5E7EB;
    --text-light: #D1D5DB;
    --bg-primary: #111827;
    --bg-secondary: #1F2937;
    --bg-dark: #030712;
    --gray-100: #374151;
    --gray-200: #4B5563;
    --gray-800: #E5E7EB;
    --gray-900: #F3F4F6;
}

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

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

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

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

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

ul, ol {
    list-style: none;
}

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

/* ===============================================
   2. TYPOGRAPHY
   =============================================== */

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    color: var(--text-primary);
}

h1 { font-size: 3.5rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 1.875rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

.highlight {
    color: var(--secondary-color);
}

/* ===============================================
   3. LAYOUT & CONTAINER
   =============================================== */

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

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

/* ===============================================
   4. NAVIGATION
   =============================================== */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: var(--bg-primary);
    box-shadow: var(--shadow-md);
    z-index: 1000;
    transition: all var(--transition-normal);
}

.navbar.scrolled {
    box-shadow: var(--shadow-lg);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
}

.logo {
    font-family: var(--font-heading);
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--primary-color);
}

.logo-dot {
    color: var(--secondary-color);
}

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

.nav-link {
    font-weight: 500;
    color: var(--text-secondary);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    position: relative;
}

.nav-link:hover {
    color: var(--primary-color);
    background-color: var(--gray-100);
}

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

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60%;
    height: 2px;
    background-color: var(--secondary-color);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    padding: var(--spacing-xs);
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--text-primary);
    border-radius: 2px;
    transition: all var(--transition-fast);
}

/* ===============================================
   5. DARK MODE TOGGLE
   =============================================== */

.dark-mode-toggle {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 3.5rem;
    height: 3.5rem;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    box-shadow: var(--shadow-xl);
    z-index: 999;
    transition: all var(--transition-normal);
}

.dark-mode-toggle:hover {
    transform: scale(1.1);
    box-shadow: 0 25px 35px -5px rgba(0, 0, 0, 0.2);
}

/* ===============================================
   6. BUTTONS
   =============================================== */

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 0.875rem 2rem;
    border-radius: var(--radius-lg);
    font-weight: 600;
    font-size: 1rem;
    transition: all var(--transition-normal);
    cursor: pointer;
}

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

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

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

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

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

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

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

.btn-icon {
    background: rgba(255, 255, 255, 0.95);
    color: var(--primary-color);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    font-weight: 600;
    transition: all var(--transition-normal);
}

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

/* ===============================================
   7. HERO SECTION
   =============================================== */

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, #EBF4FF 0%, #E0F2F1 100%);
    opacity: 0.6;
    z-index: -1;
}

[data-theme="dark"] .hero-background {
    background: linear-gradient(135deg, rgba(30, 58, 138, 0.1) 0%, rgba(16, 185, 129, 0.1) 100%);
}

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

.hero-content {
    z-index: 1;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: var(--spacing-md);
    line-height: 1.1;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    font-weight: 500;
}

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

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

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

.hero-social a {
    width: 3rem;
    height: 3rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 1.25rem;
    transition: all var(--transition-normal);
}

.hero-social a:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

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

.hero-image-placeholder {
    width: 400px;
    height: 400px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 8rem;
    box-shadow: var(--shadow-xl);
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
}

.scroll-indicator a {
    font-size: 2rem;
    color: var(--primary-color);
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
    40% { transform: translateX(-50%) translateY(-10px); }
    60% { transform: translateX(-50%) translateY(-5px); }
}

/* ===============================================
   8. SECTION HEADERS
   =============================================== */

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: var(--spacing-sm);
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 2px;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-light);
    margin-top: var(--spacing-md);
}

/* ===============================================
   9. ABOUT SECTION
   =============================================== */

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

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

.about-text h3 {
    font-size: 1.875rem;
    margin-bottom: var(--spacing-md);
    color: var(--primary-color);
}

.about-text p {
    font-size: 1.0625rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

.about-text .btn {
    margin-top: var(--spacing-md);
}

.about-skills h3 {
    font-size: 1.875rem;
    margin-bottom: var(--spacing-lg);
    color: var(--primary-color);
}

.skills-grid {
    display: grid;
    gap: var(--spacing-lg);
}

.skill-category {
    background: var(--bg-primary);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.skill-category h4 {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    color: var(--primary-color);
    font-size: 1.25rem;
}

.skill-category i {
    color: var(--secondary-color);
}

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

.badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: linear-gradient(135deg, var(--primary-light), var(--primary-color));
    color: white;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 600;
    transition: all var(--transition-fast);
}

.badge:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ===============================================
   10. PORTFOLIO SECTION
   =============================================== */

.portfolio {
    background-color: var(--bg-primary);
}

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

.filter-btn {
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-lg);
    font-weight: 600;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

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

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
}

.project-card {
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-normal);
}

.project-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.project-image {
    position: relative;
    overflow: hidden;
    height: 250px;
}

.project-image-placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 4rem;
}

.project-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(30, 58, 138, 0.95);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.project-card:hover .project-overlay {
    opacity: 1;
}

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

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

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

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

.tech-badge {
    padding: 0.375rem 0.75rem;
    background: var(--gray-200);
    color: var(--text-primary);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
}

[data-theme="dark"] .tech-badge {
    background: var(--gray-700);
}

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

.project-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--primary-color);
    font-weight: 600;
    transition: all var(--transition-fast);
}

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

/* ===============================================
   11. SERVICES SECTION
   =============================================== */

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

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

.service-card {
    background: var(--bg-primary);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-normal);
    text-align: center;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.service-icon {
    width: 5rem;
    height: 5rem;
    margin: 0 auto var(--spacing-lg);
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 2.5rem;
}

.service-title {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
    color: var(--primary-color);
}

.service-description {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

.service-features {
    text-align: left;
    margin-bottom: var(--spacing-lg);
}

.service-features li {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    color: var(--text-secondary);
}

.service-features i {
    color: var(--secondary-color);
    font-size: 1.125rem;
}

/* ===============================================
   12. BLOG SECTION
   =============================================== */

.blog {
    background-color: var(--bg-primary);
}

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

.blog-card {
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-normal);
}

.blog-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.blog-image {
    position: relative;
    height: 220px;
}

.blog-image-placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 3.5rem;
}

.blog-category {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    padding: 0.5rem 1rem;
    background: white;
    color: var(--primary-color);
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 0.875rem;
}

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

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

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

.blog-title {
    font-size: 1.375rem;
    margin-bottom: var(--spacing-sm);
    color: var(--primary-color);
    line-height: 1.4;
}

.blog-excerpt {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

.blog-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--secondary-color);
    font-weight: 600;
    transition: all var(--transition-fast);
}

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

.blog-cta {
    text-align: center;
    margin-top: var(--spacing-xl);
}

/* ===============================================
   13. CONTACT SECTION
   =============================================== */

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

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--spacing-2xl);
    margin-top: var(--spacing-xl);
}

.contact-info h3 {
    font-size: 1.875rem;
    margin-bottom: var(--spacing-md);
    color: var(--primary-color);
}

.contact-info > p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    line-height: 1.8;
}

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

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

.contact-icon {
    width: 3rem;
    height: 3rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.25rem;
    flex-shrink: 0;
}

.contact-item h4 {
    font-size: 1.125rem;
    margin-bottom: 0.25rem;
    color: var(--primary-color);
}

/* ===============================================
   14. PROJECT MODAL STYLES
   =============================================== */

.modal-header-title {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 2rem;
}

.modal-description {
    color: var(--text-secondary);
    margin-bottom: 2rem;
    font-size: 1.125rem;
    line-height: 1.8;
}

.modal-section-box {
    background: var(--bg-secondary);
    padding: 1.5rem;
    border-radius: 0.75rem;
    margin-bottom: 2rem;
}

.modal-section-title {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.modal-section-text {
    color: var(--text-secondary);
    line-height: 1.8;
}

.modal-icon-accent {
    color: var(--accent-color);
}

.modal-icon-secondary {
    color: var(--secondary-color);
}

.modal-icon-primary-light {
    color: var(--primary-light);
}

.modal-tech-section {
    margin-bottom: 2rem;
}

.modal-tech-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.modal-tech-badge {
    padding: 0.5rem 1rem;
    background: linear-gradient(135deg, var(--primary-light), var(--primary-color));
    color: white;
    border-radius: 0.5rem;
    font-size: 0.875rem;
    font-weight: 600;
}

.modal-features-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
}

.modal-list-item {
    display: flex;
    gap: 0.75rem;
    align-items: start;
    color: var(--text-secondary);
    line-height: 1.6;
}

.modal-list-icon {
    color: var(--secondary-color);
    margin-top: 0.25rem;
    flex-shrink: 0;
}

.modal-results-box {
    background: linear-gradient(135deg, rgba(30, 58, 138, 0.1), rgba(16, 185, 129, 0.1));
    padding: 1.5rem;
    border-radius: 0.75rem;
    margin-bottom: 2rem;
}

[data-theme="dark"] .modal-results-box {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(16, 185, 129, 0.1));
}

.modal-results-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.modal-result-item {
    display: flex;
    gap: 0.75rem;
    align-items: start;
    color: var(--text-secondary);
    line-height: 1.6;
    font-weight: 600;
}

.modal-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-top: 2rem;
}

.contact-item p,
.contact-item a {
    color: var(--text-secondary);
}

.contact-item a:hover {
    color: var(--secondary-color);
}

.contact-social h4 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-md);
    color: var(--primary-color);
}

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

.social-links a {
    width: 3rem;
    height: 3rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--bg-primary);
    color: var(--primary-color);
    font-size: 1.25rem;
    transition: all var(--transition-normal);
}

.social-links a:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

/* ===============================================
   14. CONTACT FORM
   =============================================== */

.contact-form {
    background: var(--bg-primary);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
}

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

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
    color: var(--text-primary);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-md);
    font-family: var(--font-body);
    font-size: 1rem;
    background: var(--bg-primary);
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(30, 58, 138, 0.1);
}

.form-group textarea {
    resize: vertical;
}

.form-message {
    margin-top: var(--spacing-md);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    text-align: center;
    font-weight: 600;
    display: none;
}

.form-message.success {
    display: block;
    background: rgba(16, 185, 129, 0.1);
    color: var(--secondary-color);
    border: 2px solid var(--secondary-color);
}

.form-message.error {
    display: block;
    background: rgba(239, 68, 68, 0.1);
    color: #EF4444;
    border: 2px solid #EF4444;
}

/* ===============================================
   15. FOOTER
   =============================================== */

.footer {
    background: var(--bg-dark);
    color: var(--gray-300);
    padding: var(--spacing-2xl) 0 var(--spacing-lg);
}

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 2fr;
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-xl);
}

.footer-brand h3 {
    font-size: 2rem;
    color: white;
    margin-bottom: var(--spacing-sm);
}

.footer-brand p {
    color: var(--gray-400);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
}

.footer-column h4 {
    color: white;
    margin-bottom: var(--spacing-md);
    font-size: 1.125rem;
}

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

.footer-column a {
    color: var(--gray-400);
    transition: color var(--transition-fast);
}

.footer-column a:hover {
    color: var(--secondary-color);
}

.footer-bottom {
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--gray-700);
    text-align: center;
    color: var(--gray-400);
}

/* ===============================================
   16. MODAL
   =============================================== */

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    z-index: 2000;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    max-width: 900px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    padding: var(--spacing-xl);
    position: relative;
    animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-close {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    width: 2.5rem;
    height: 2.5rem;
    background: var(--gray-200);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background: var(--gray-300);
    transform: rotate(90deg);
}

/* ===============================================
   17. RESPONSIVE DESIGN
   =============================================== */

/* Tablets */
@media (max-width: 1024px) {
    h1 { font-size: 3rem; }
    h2 { font-size: 2rem; }
    
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-image {
        display: none;
    }
    
    .hero-cta {
        justify-content: center;
    }
    
    .hero-social {
        justify-content: center;
    }
    
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
}

/* Mobile */
@media (max-width: 768px) {
    html {
        font-size: 14px;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--bg-primary);
        flex-direction: column;
        padding: var(--spacing-lg);
        box-shadow: var(--shadow-lg);
        transform: translateX(-100%);
        transition: transform var(--transition-normal);
    }
    
    .nav-menu.active {
        transform: translateX(0);
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.25rem;
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .portfolio-grid {
        grid-template-columns: 1fr;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .blog-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
    }
    
    .dark-mode-toggle {
        width: 3rem;
        height: 3rem;
        bottom: 1rem;
        right: 1rem;
    }
}

/* ===============================================
   18. UTILITIES
   =============================================== */

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

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

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

.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }

.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }

/* ===============================================
   19. ANIMATIONS
   =============================================== */

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

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.slide-up {
    animation: slideUp 0.6s ease;
}

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

/* ===============================================
   20. PROJECT MODAL SPECIFIC STYLES
   =============================================== */

.modal-header-title {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 2rem;
}

.modal-description {
    color: var(--text-secondary);
    margin-bottom: 2rem;
    font-size: 1.125rem;
    line-height: 1.8;
}

.modal-section-box {
    background: var(--bg-secondary);
    padding: 1.5rem;
    border-radius: 0.75rem;
    margin-bottom: 2rem;
}

.modal-section-title {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.modal-section-text {
    color: var(--text-secondary);
    line-height: 1.8;
}

.modal-icon-accent {
    color: var(--accent-color);
}

.modal-icon-secondary {
    color: var(--secondary-color);
}

.modal-icon-primary-light {
    color: var(--primary-light);
}

.modal-tech-section {
    margin-bottom: 2rem;
}

.modal-tech-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.modal-tech-badge {
    padding: 0.5rem 1rem;
    background: linear-gradient(135deg, var(--primary-light), var(--primary-color));
    color: white;
    border-radius: 0.5rem;
    font-size: 0.875rem;
    font-weight: 600;
}

.modal-features-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
}

.modal-list-item {
    display: flex;
    gap: 0.75rem;
    align-items: start;
    color: var(--text-secondary);
    line-height: 1.6;
}

.modal-list-icon {
    color: var(--secondary-color);
    margin-top: 0.25rem;
    flex-shrink: 0;
}

.modal-results-box {
    background: linear-gradient(135deg, rgba(30, 58, 138, 0.1), rgba(16, 185, 129, 0.1));
    padding: 1.5rem;
    border-radius: 0.75rem;
    margin-bottom: 2rem;
}

[data-theme="dark"] .modal-results-box {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(16, 185, 129, 0.1));
}

.modal-results-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.modal-result-item {
    display: flex;
    gap: 0.75rem;
    align-items: start;
    color: var(--text-secondary);
    line-height: 1.6;
    font-weight: 600;
}

.modal-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-top: 2rem;
}