/* ==========================================
   Global Styles & Variables
   ========================================== */
:root {
    /* Light Theme Colors */
    --primary-color: #4f46e5;
    --primary-hover: #4338ca;
    --secondary-color: #10b981;
    --background-color: #ffffff;
    --surface-color: #f9fafb;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --border-color: #e5e7eb;
    --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);
}

[data-theme="dark"] {
    /* Dark Theme Colors */
    --primary-color: #6366f1;
    --primary-hover: #818cf8;
    --secondary-color: #34d399;
    --background-color: #111827;
    --surface-color: #1f2937;
    --text-primary: #f9fafb;
    --text-secondary: #9ca3af;
    --border-color: #374151;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.6);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--background-color);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
    padding-top: 80px;
    min-height: 100vh;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Poppins', sans-serif;
    font-weight: 600;
    color: var(--text-primary);
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

/* ==========================================
   Navbar Styles
   ========================================== */
.navbar {
    background-color: var(--surface-color);
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-md);
    padding: 1rem 0;
    transition: all 0.3s ease;
}

.navbar-brand {
    font-family: 'Poppins', sans-serif;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color) !important;
    transition: transform 0.3s ease;
}

.navbar-brand:hover {
    transform: scale(1.05);
}

/* Hamburger Menu - Light Theme Fix */
.navbar-toggler {
    border: 2px solid var(--text-primary) !important;
    padding: 0.5rem;
}

.navbar-toggler-icon {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='%231f2937' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e") !important;
}

[data-theme="dark"] .navbar-toggler-icon {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='%23f9fafb' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e") !important;
}

[data-theme="dark"] .navbar-toggler {
    border-color: var(--text-primary) !important;
}

.nav-link {
    color: var(--text-primary) !important;
    font-weight: 500;
    padding: 0.5rem 1rem !important;
    margin: 0 0.25rem;
    border-radius: 0.375rem;
    transition: all 0.3s ease;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: width 0.3s ease;
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 80%;
}

.nav-link:hover {
    background-color: rgba(79, 70, 229, 0.1);
    color: var(--primary-color) !important;
}

.btn-theme-toggle {
    background-color: transparent;
    border: 2px solid var(--border-color);
    color: var(--text-primary);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-left: 1rem;
}

.btn-theme-toggle:hover {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
    transform: rotate(180deg);
}

/* ==========================================
   Hero Section
   ========================================== */
.hero-section {
    min-height: calc(100vh - 80px);
    padding: 4rem 0;
    position: relative;
    overflow: hidden;
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.hero-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    max-width: 600px;
}

.hero-buttons .btn {
    margin-bottom: 1rem;
}

.hero-social {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
}

.social-icon {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--surface-color);
    border: 2px solid var(--border-color);
    color: var(--text-primary);
    font-size: 1.25rem;
    transition: all 0.3s ease;
}

.social-icon:hover {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
    transform: translateY(-5px);
}

/* Code Illustration */
.code-illustration {
    perspective: 1000px;
}

.code-window {
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    transform: rotateY(-5deg);
    transition: transform 0.5s ease;
}

.code-window:hover {
    transform: rotateY(0deg);
}

.code-header {
    background-color: var(--border-color);
    padding: 0.75rem 1rem;
    display: flex;
    gap: 0.5rem;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.dot-red { background-color: #ef4444; }
.dot-yellow { background-color: #f59e0b; }
.dot-green { background-color: #10b981; }

.code-body {
    padding: 1.5rem;
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    line-height: 1.8;
}

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

.keyword { color: #c678dd; }
.class-name { color: #e5c07b; }
.string { color: #98c379; }
.bracket { color: #61afef; }
.indent { padding-left: 2rem; }
.indent2 { padding-left: 4rem; }

/* Scroll Down Indicator */
.scroll-down {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
}

.scroll-icon {
    width: 30px;
    height: 50px;
    border: 2px solid var(--text-secondary);
    border-radius: 20px;
    position: relative;
}

.scroll-icon::before {
    content: '';
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 6px;
    height: 6px;
    background-color: var(--primary-color);
    border-radius: 50%;
    animation: scroll 2s infinite;
}

@keyframes scroll {
    0%, 20% { transform: translate(-50%, 0); opacity: 1; }
    100% { transform: translate(-50%, 20px); opacity: 0; }
}

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

/* ==========================================
   Stats Section
   ========================================== */
.stats-section {
    background-color: var(--surface-color);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.stat-card {
    padding: 2rem 1rem;
    transition: transform 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-5px);
}

.stat-icon {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 1rem;
    margin-bottom: 0;
}

/* ==========================================
   Section Styles
   ========================================== */
.page-section {
    padding: 4rem 0;
}

.section-header {
    margin-bottom: 3rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.section-divider {
    width: 60px;
    height: 4px;
    background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
    margin: 1rem auto;
    border-radius: 2px;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
}

/* ==========================================
   Button Styles
   ========================================== */
.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
    padding: 0.75rem 1.5rem;
    font-weight: 600;
    border-radius: 0.5rem;
    transition: all 0.3s ease;
}

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

.btn-outline-primary {
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
    background-color: transparent;
    padding: 0.75rem 1.5rem;
    font-weight: 600;
    border-radius: 0.5rem;
    transition: all 0.3s ease;
}

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

/* ==========================================
   About Section
   ========================================== */
.about-image-wrapper {
    display: flex;
    justify-content: center;
}

.about-image-card {
    position: relative;
}

.profile-image {
    width: 300px;
    height: 300px;
    border-radius: 1rem;
    overflow: hidden;
    border: 4px solid var(--primary-color);
    box-shadow: var(--shadow-xl);
    margin-bottom: 1.5rem;
}

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

.about-info-card {
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 1.5rem;
    box-shadow: var(--shadow-md);
}

.info-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-color);
}

.info-item:last-child {
    border-bottom: none;
}

.info-item i {
    font-size: 1.5rem;
    color: var(--primary-color);
    width: 30px;
    text-align: center;
}

.info-label {
    display: block;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.info-value {
    display: block;
    font-weight: 600;
    color: var(--text-primary);
}

.highlights-section {
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 1.5rem;
    margin-top: 2rem;
}

.highlights-title {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

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

.highlight-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.highlight-item i {
    color: var(--secondary-color);
    font-size: 1.25rem;
}

/* ==========================================
   Skills Section
   ========================================== */
.skills-container .category-title {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--primary-color);
}

/* Skill Card Design - Professional & Modern */
.skill-card {
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 1.25rem 1.5rem;
    height: 100%;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.skill-card::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: linear-gradient(180deg, var(--primary-color), var(--secondary-color));
    transform: scaleY(0);
    transform-origin: top;
    transition: transform 0.3s ease;
}

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

.skill-card:hover::before {
    transform: scaleY(1);
}

.skill-card-content {
    position: relative;
    z-index: 1;
}

.skill-card-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
}

.skill-card-title i {
    color: var(--primary-color);
    font-size: 0.875rem;
}

.skill-card-description {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.5;
}

.skills-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    justify-content: center;
}

.skill-tag {
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.5rem 1rem;
    border-radius: 2rem;
    font-size: 0.875rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

.skill-tag:hover {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    transform: scale(1.05);
}

/* ==========================================
   Timeline (Experience)
   ========================================== */
.timeline {
    position: relative;
    padding: 2rem 0;
}

.timeline::before {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    left: 50%;
    width: 2px;
    background: linear-gradient(to bottom, var(--primary-color), var(--secondary-color));
    transform: translateX(-50%);
}

.timeline-item {
    margin-bottom: 3rem;
    position: relative;
}

.timeline-content {
    position: relative;
    width: 45%;
}

.timeline-left .timeline-content {
    margin-left: 0;
    margin-right: auto;
    text-align: right;
}

.timeline-right .timeline-content {
    margin-left: auto;
    margin-right: 0;
}

.timeline-icon {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: var(--primary-color);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    box-shadow: var(--shadow-lg);
    z-index: 1;
}

.timeline-card {
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 2rem;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

.timeline-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.timeline-period {
    display: inline-block;
    background-color: var(--primary-color);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.timeline-title {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.timeline-company {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.timeline-description {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.highlights-list {
    list-style: none;
    padding: 0;
    margin: 1rem 0 0 0;
}

.highlights-list li {
    padding: 0.5rem 0;
    color: var(--text-secondary);
}

.highlights-subtitle {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

/* ==========================================
   Projects Section
   ========================================== */
/* Project Card - Enhanced Design */
.project-card {
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    padding: 0;
    height: 100%;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
}

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

.project-header {
    padding: 2rem 2rem 1rem 2rem;
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.project-icon-emoji {
    font-size: 3rem;
    line-height: 1;
    flex-shrink: 0;
}

.project-header-text {
    flex: 1;
}

.project-title {
    font-size: 1.35rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    line-height: 1.4;
}

.project-subtitle {
    font-size: 0.9rem;
    color: var(--primary-color);
    font-weight: 500;
    margin: 0;
}

.project-content {
    padding: 0 2rem 2rem 2rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.project-description {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.6;
    font-size: 0.95rem;
}

.project-highlights {
    margin-bottom: 1.5rem;
    padding: 1rem;
    background-color: rgba(99, 102, 241, 0.05);
    border-radius: 0.5rem;
    border-left: 3px solid var(--primary-color);
}

.highlights-label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.highlights-list {
    margin: 0;
    padding-left: 1.25rem;
    list-style: none;
}

.highlights-list li {
    position: relative;
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    padding-left: 0.5rem;
}

.highlights-list li:before {
    content: '✓';
    position: absolute;
    left: -1rem;
    color: var(--primary-color);
    font-weight: bold;
}

.highlights-list li:last-child {
    margin-bottom: 0;
}

.project-technologies {
    margin-bottom: 1.5rem;
}

.tech-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
}

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

.tech-badge {
    display: inline-block;
    padding: 0.4rem 0.85rem;
    background-color: var(--primary-color-transparent);
    color: var(--primary-color);
    border-radius: 0.375rem;
    font-size: 0.85rem;
    font-weight: 500;
    border: 1px solid var(--primary-color);
}

.project-links {
    display: flex;
    gap: 1rem;
    margin-top: auto;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary-color);
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    font-size: 0.95rem;
}

.project-link:hover {
    color: var(--primary-hover);
    transform: translateX(5px);
}

/* ==========================================
   Education Section
   ========================================== */
.subsection-title {
    font-size: 2rem;
    margin-bottom: 2rem;
    color: var(--primary-color);
}

.education-card,
.certification-card {
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 2rem;
    height: 100%;
    transition: all 0.3s ease;
    position: relative;
}

.education-card:hover,
.certification-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.education-icon,
.certification-ribbon {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.education-period {
    display: inline-block;
    background-color: var(--primary-color);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.education-degree {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.education-institution,
.certification-issuer {
    color: var(--text-secondary);
    font-size: 1.125rem;
    margin-bottom: 0.75rem;
}

.education-location,
.certification-date {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.certification-title {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
}

/* ==========================================
   Contact Section
   ========================================== */
.contact-form-card {
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 2rem;
    box-shadow: var(--shadow-md);
}

.form-title,
.info-title {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--primary-color);
}

.form-control {
    background-color: var(--background-color);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.75rem 1rem;
    border-radius: 0.5rem;
    transition: all 0.3s ease;
}

.form-control:focus {
    background-color: var(--background-color);
    border-color: var(--primary-color);
    color: var(--text-primary);
    box-shadow: 0 0 0 0.2rem rgba(79, 70, 229, 0.25);
}

.form-label {
    color: var(--text-primary);
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.contact-info-section {
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 2rem;
    box-shadow: var(--shadow-md);
}

.contact-info-cards .info-card {
    background-color: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    padding: 1.5rem;
    margin-bottom: 1rem;
    display: flex;
    gap: 1rem;
    transition: all 0.3s ease;
}

.contact-info-cards .info-card:hover {
    transform: translateX(10px);
    box-shadow: var(--shadow-md);
}

.contact-info-cards .info-icon {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: var(--surface-color);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    font-size: 1.5rem;
    flex-shrink: 0;
}

.contact-info-cards .info-details h4 {
    font-size: 1rem;
    margin-bottom: 0.25rem;
    color: var(--text-secondary);
}

.contact-info-cards .info-details a,
.contact-info-cards .info-details p {
    color: var(--text-primary);
    margin: 0;
}

.social-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.social-btn {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: var(--background-color);
    border: 2px solid var(--border-color);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    transition: all 0.3s ease;
}

.social-btn:hover {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
    transform: translateY(-5px);
}

/* ==========================================
   Footer Styles
   ========================================== */
.footer {
    background-color: var(--surface-color);
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
}

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

.footer-text-secondary {
    color: var(--text-secondary);
    opacity: 0.9;
}

/* Dark mode için özel ayarlamalar */
[data-theme="dark"] .footer-text-secondary {
    color: #d1d5db;
    opacity: 1;
}

[data-theme="dark"] .footer-text {
    color: #f3f4f6;
}

.footer .pulse {
    animation: heartbeat 1.5s ease-in-out infinite;
}

@keyframes heartbeat {
    0%, 100% { transform: scale(1); }
    10%, 30% { transform: scale(0.9); }
    20%, 40% { transform: scale(1.1); }
}

.footer-social-links {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.footer-social-link {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--background-color);
    border: 2px solid var(--border-color);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.125rem;
    transition: all 0.3s ease;
}

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

/* ==========================================
   Scroll to Top Button
   ========================================== */
.scroll-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: var(--primary-color);
    color: white;
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 1000;
}

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

.scroll-to-top:hover {
    background-color: var(--primary-hover);
    transform: translateY(-5px);
}

/* ==========================================
   Error Page
   ========================================== */
.error-section {
    padding: 4rem 0;
}

.error-code {
    font-size: 6rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.error-title {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.error-message {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

/* ==========================================
   Animations
   ========================================== */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

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

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

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

.animate-slide-up {
    animation: slideUp 0.8s ease-out;
}

.animate-slide-left {
    animation: slideLeft 0.8s ease-out;
}

.animate-slide-right {
    animation: slideRight 0.8s ease-out;
}

/* ==========================================
   Responsive Design
   ========================================== */
@media (max-width: 991px) {
    .hero-title { font-size: 2.5rem; }
    .hero-subtitle { font-size: 1.75rem; }
    .section-title { font-size: 2rem; }
    
    .timeline::before {
        left: 30px;
    }
    
    .timeline-content {
        width: 100%;
        margin-left: 80px !important;
        text-align: left !important;
    }
    
    .timeline-icon {
        left: 30px;
    }
}

@media (max-width: 767px) {
    body { padding-top: 70px; }
    .hero-title { font-size: 2rem; }
    .hero-subtitle { font-size: 1.5rem; }
    .hero-description { font-size: 1rem; }
    .section-title { font-size: 1.75rem; }
    .stat-number { font-size: 2rem; }
    .profile-image { width: 250px; height: 250px; }
}