/* CSS Custom Properties */
:root {
    --primary-color: #00bcd4;
    --primary-dark: #00acc1;
    --secondary-color: #ff6b6b;
    --accent-color: #4ecdc4;
    --text-primary: #333333;
    --text-secondary: #666666;
    --text-light: #999999;
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-card: #ffffff;
    --border-color: #e0e0e0;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 8px 15px rgba(0, 0, 0, 0.2);
    --transition: all 0.3s ease;
    --border-radius: 8px;
    --max-width: 1200px;
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

/* Dark Mode Variables */
[data-theme="dark"] {
    --text-primary: #ffffff;
    --text-secondary: #cccccc;
    --text-light: #999999;
    --bg-primary: #1a1a1a;
    --bg-secondary: #2d2d2d;
    --bg-card: #2d2d2d;
    --border-color: #404040;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
    --shadow-hover: 0 8px 15px rgba(0, 0, 0, 0.4);
}

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

html {
    scroll-behavior: smooth;
}

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

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: 1rem;
}

h1 {
    font-size: 3rem;
}

h2 {
    font-size: 2.5rem;
}

h3 {
    font-size: 2rem;
}

h4 {
    font-size: 1.5rem;
}

p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

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

.section-title {
    text-align: center;
    margin-bottom: 3rem;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: var(--primary-color);
    border-radius: 2px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 12px 24px;
    background: transparent;
    color: var(--text-primary);
    text-decoration: none;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-weight: 500;
    transition: var(--transition);
    cursor: pointer;
    font-size: 1rem;
}

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

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

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

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

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

.btn-small {
    padding: 8px 16px;
    font-size: 0.9rem;
}

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

[data-theme="dark"] .navbar {
    background: rgba(26, 26, 26, 0.95);
}

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

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 1rem 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo a {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

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

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition);
}

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

.nav-toggle-container {
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* Language Switcher */
.language-switcher {
    position: relative;
}

.language-toggle {
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1rem;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: var(--border-radius);
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.language-toggle:hover {
    background: var(--bg-secondary);
}

.language-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: var(--transition);
    z-index: 1000;
    min-width: 120px;
}

.language-dropdown.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.language-option {
    width: 100%;
    padding: 0.75rem 1rem;
    background: none;
    border: none;
    color: var(--text-primary);
    text-align: left;
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.9rem;
}

.language-option:hover {
    background: var(--bg-secondary);
}

.language-option.active {
    color: var(--primary-color);
    background: var(--bg-secondary);
}

.theme-toggle {
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.2rem;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.theme-toggle:hover {
    background: var(--bg-secondary);
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.hamburger .bar {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    transition: var(--transition);
}

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

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

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

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    position: relative;
    overflow: hidden;
}

.hero-container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
}

.hero-content {
    text-align: center;
    animation: fadeInUp 1s ease-out;
}

.hero h1 {
    font-size: 4rem;
    margin-bottom: 1rem;
    animation: fadeInUp 1s ease-out 0.2s both;
}

.typing-container {
    margin-bottom: 2rem;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.typing-text {
    color: var(--primary-color);
    font-weight: 600;
    position: relative;
}

.typing-text::after {
    content: '|';
    animation: blink 1s infinite;
}

.hero-description {
    font-size: 1.2rem;
    max-width: 600px;
    margin: 0 auto 2rem;
    animation: fadeInUp 1s ease-out 0.4s both;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 1s ease-out 0.6s both;
}

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
}

.scroll-arrow {
    width: 20px;
    height: 20px;
    border: 2px solid var(--primary-color);
    border-top: none;
    border-left: none;
    transform: rotate(45deg);
}

/* About Section */
.about {
    padding: 100px 0;
    background: var(--bg-secondary);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 4rem;
    align-items: center;
}

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

.profile-photo {
    width: 300px;
    height: 300px;
    border-radius: 50%;
    object-fit: cover;
    border: 5px solid var(--primary-color);
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.profile-photo:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-hover);
}

.about-text h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.about-stats {
    display: flex;
    gap: 2rem;
    margin-top: 2rem;
}

.stat {
    text-align: center;
}

.stat h4 {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.stat p {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* Education Section */
.education {
    padding: 100px 0;
    background: var(--bg-primary);
}

.education-content {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.education-card {
    display: flex;
    gap: 2rem;
    align-items: center;
    background: var(--bg-card);
    padding: 3rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
    max-width: 800px;
    margin: 0 auto;
}

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

.education-logo {
    font-size: 4rem;
    color: var(--primary-color);
    flex-shrink: 0;
}

.education-logo-img {
    width: 120px;
    height: auto;
    object-fit: contain;
}

.education-info h3 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.degree {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.duration {
    color: var(--text-secondary);
    font-weight: 500;
    margin-bottom: 1rem;
}

.education-details p {
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
}

/* Skills Section */
.skills {
    padding: 100px 0;
    background: var(--bg-secondary);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.skill-item {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: var(--border-radius);
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.skill-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.skill-icon {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

/* Technology-specific icon colors */
.skill-item:nth-child(1) .skill-icon .fa-html5 {
    color: #E34F26;
}

.skill-item:nth-child(2) .skill-icon .fa-css3-alt {
    color: #1572B6;
}

.skill-item:nth-child(3) .skill-icon .fa-js-square {
    color: #F7DF1E;
}

.skill-item:nth-child(4) .skill-icon .fa-aws {
    color: #FF9900;
}

.skill-item:nth-child(5) .skill-icon .fa-linux {
    color: #1793D1;
}

.skill-item:nth-child(6) .skill-icon .fa-github {
    color: #333;
}

[data-theme="dark"] .skill-item:nth-child(6) .skill-icon .fa-github {
    color: #fff;
}

.skill-item:nth-child(7) .skill-icon .fa-gitlab {
    color: #FC6D26;
}

.skill-item:nth-child(8) .skill-icon .fa-java {
    color: #007396;
}

.skill-item:nth-child(10) .skill-icon .fa-microsoft {
    color: #00A1F1;
}

.skill-item:nth-child(11) .skill-icon .fa-hashtag {
    color: #239120;
}

.skill-item:nth-child(12) .skill-icon .fa-android {
    color: #A4C639;
}

.skill-item h3 {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.skill-item p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Projects Section */
.projects {
    padding: 100px 0;
    background: var(--bg-primary);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

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

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

.project-image {
    height: 200px;
    background: var(--bg-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.project-placeholder {
    font-size: 4rem;
    color: var(--primary-color);
    opacity: 0.7;
}

.project-content {
    padding: 1.5rem;
}

.project-content h3 {
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.project-content p {
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

.project-tech {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.tech-tag {
    background: var(--primary-color);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
}

.project-links {
    display: flex;
    gap: 1rem;
}

/* Certificates Section */
.certificates {
    padding: 100px 0;
    background: var(--bg-secondary);
}

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

.certificate-card {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
    text-align: center;
}

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

.certificate-image {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.certificate-content h3 {
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.certificate-content p {
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

.certificate-issuer {
    color: var(--primary-color);
    font-weight: 600;
    font-size: 0.9rem;
}

/* Resume Section */
.resume {
    padding: 100px 0;
    background: var(--bg-primary);
}

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

.resume-content p {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Contact Section */
.contact {
    padding: 100px 0;
    background: var(--bg-secondary);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.contact-info h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

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

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

.contact-item p {
    color: var(--text-secondary);
    margin: 0;
}

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

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    text-decoration: none;
    transition: var(--transition);
}

.social-links a:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
}

.contact-form {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-family: inherit;
    font-size: 1rem;
    color: var(--text-primary);
    background: var(--bg-primary);
    transition: var(--transition);
}

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

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

/* Form Message Styles */
.form-message {
    padding: 1rem;
    margin-top: 1rem;
    border-radius: var(--border-radius);
    font-weight: 500;
    text-align: center;
    animation: fadeInUp 0.5s ease-out;
}

.form-message.success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.form-message.error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.form-message.loading {
    background: #d1ecf1;
    color: #0c5460;
    border: 1px solid #bee5eb;
}

/* Success Dialog Styles */
.dialog-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 10000;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.dialog-overlay.show {
    opacity: 1;
    visibility: visible;
}

.dialog-content {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
    max-width: 500px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    transform: scale(0.8) translateY(-50px);
    transition: transform 0.3s ease;
}

.dialog-overlay.show .dialog-content {
    transform: scale(1) translateY(0);
}

.dialog-header {
    padding: 2rem 2rem 1rem;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

.dialog-header i {
    font-size: 3rem;
    color: #28a745;
    margin-bottom: 1rem;
}

.dialog-header h3 {
    margin: 0;
    color: var(--text-primary);
    font-size: 1.5rem;
}

.dialog-body {
    padding: 1.5rem 2rem;
    text-align: center;
}

.dialog-body p {
    margin: 0;
    color: var(--text-secondary);
    font-size: 1.1rem;
    line-height: 1.6;
}

.dialog-footer {
    padding: 1rem 2rem 2rem;
    text-align: center;
    border-top: 1px solid var(--border-color);
}

.dialog-footer .btn {
    min-width: 120px;
}

/* Button Loading States */
.btn {
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
}

.btn-content,
.btn-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: all 0.3s ease;
}

.btn-loading {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: inherit;
    opacity: 0;
    transform: translateY(100%);
}

.btn.loading .btn-content {
    opacity: 0;
    transform: translateY(-100%);
}

.btn.loading .btn-loading {
    opacity: 1;
    transform: translateY(0);
}

.btn.loading {
    pointer-events: none;
}

/* Success Notification */
.success-notification {
    position: fixed;
    top: 20px;
    right: 20px;
    background: linear-gradient(135deg, #28a745, #20c997);
    color: white;
    padding: 1rem 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: 0 10px 30px rgba(40, 167, 69, 0.3);
    z-index: 10001;
    transform: translateX(400px);
    opacity: 0;
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    min-width: 300px;
}

.success-notification.show {
    transform: translateX(0);
    opacity: 1;
}

.success-notification .notification-content {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.success-notification .notification-icon {
    font-size: 1.5rem;
    color: #fff;
}

.success-notification .notification-text h4 {
    margin: 0 0 0.25rem 0;
    font-size: 1rem;
    font-weight: 600;
}

.success-notification .notification-text p {
    margin: 0;
    font-size: 0.875rem;
    opacity: 0.9;
}

/* Mobile notification */
@media (max-width: 768px) {
    .success-notification {
        right: 10px;
        left: 10px;
        transform: translateY(-100px);
        min-width: auto;
    }
    
    .success-notification.show {
        transform: translateY(0);
    }
}

/* Footer */
.footer {
    background: var(--bg-card);
    padding: 2rem 0;
    text-align: center;
    border-top: 1px solid var(--border-color);
}

.footer-content p {
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
}

/* Back to Top Button */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.2rem;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 1000;
}

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

.back-to-top:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

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

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: var(--bg-card);
        width: 100%;
        text-align: center;
        transition: var(--transition);
        box-shadow: var(--shadow);
        padding: 2rem 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-menu li {
        margin: 1rem 0;
    }

    .hamburger {
        display: flex;
    }
    
    .language-dropdown {
        right: auto;
        left: 0;
    }

    .hero h1 {
        font-size: 2.5rem;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .about-content {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }

    .about-stats {
        justify-content: center;
    }

    .education-card {
        flex-direction: column;
        text-align: center;
        padding: 2rem;
    }

    .contact-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .skills-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    }

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

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

    .project-links {
        flex-direction: column;
    }

    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 45px;
        height: 45px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .profile-photo {
        width: 250px;
        height: 250px;
    }

    .about-stats {
        flex-direction: column;
        align-items: center;
        gap: 1rem;
    }

    .university-card {
        padding: 1.5rem;
    }

    .skill-item {
        padding: 1.5rem;
    }

    .project-content {
        padding: 1rem;
    }

    .certificate-card {
        padding: 1.5rem;
    }

    .contact-form {
        padding: 1.5rem;
    }
}

/* Scroll animations */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Loading animation */
.loading {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 1;
    visibility: visible;
    transition: all 0.5s ease-out;
}

.loading.hidden {
    opacity: 0;
    visibility: hidden;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 3px solid var(--border-color);
    border-top: 3px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}