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

:root {
    --primary-color: #0066cc;
    --secondary-color: #004c99;
    --accent-color: #00a3e0;
    --text-dark: #2c3e50;
    --text-medium: #34495e;
    --text-light: #7f8c8d;
    --bg-light: #f8f9fa;
    --bg-white: #ffffff;
    --border-color: #dee2e6;
    --success-color: #28a745;
    --gradient-start: #0066cc;
    --gradient-end: #00a3e0;
}

body {
    font-family: 'Open Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    line-height: 1.7;
    color: var(--text-dark);
    background-color: var(--bg-white);
    font-size: 16px;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Montserrat', sans-serif;
    font-weight: 700;
    line-height: 1.3;
    color: var(--text-dark);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
    z-index: 1000;
    padding: 1.1rem 0;
    transition: all 0.3s ease;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    font-family: 'Montserrat', sans-serif;
    letter-spacing: -0.5px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2.5rem;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 600;
    transition: color 0.3s;
    font-size: 0.95rem;
    position: relative;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width 0.3s ease;
}

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

.nav-menu a:hover::after {
    width: 100%;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, #0a1628 0%, #1a2332 50%, #0f1419 100%);
    color: white;
    padding-top: 80px;
    position: relative;
    overflow: hidden;
}

#particles-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    opacity: 0.3;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 30% 50%, rgba(0, 102, 204, 0.08) 0%, transparent 60%);
    z-index: 2;
}

.hero .container {
    position: relative;
    z-index: 3;
}

.hero-content {
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-block;
    padding: 0.6rem 1.8rem;
    background: rgba(0, 163, 224, 0.2);
    border: 2px solid rgba(77, 212, 255, 0.5);
    border-radius: 50px;
    color: #4dd4ff;
    font-size: 0.875rem;
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 2rem;
    animation: fadeInUp 0.8s ease-out;
    backdrop-filter: blur(10px);
    font-family: 'Montserrat', sans-serif;
    box-shadow: 0 0 20px rgba(0, 163, 224, 0.3);
}

.hero-title {
    font-size: 4.5rem;
    font-weight: 700;
    margin-bottom: 1.25rem;
    animation: fadeInUp 0.8s ease-out 0.1s both;
    color: #ffffff;
    letter-spacing: -1px;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.hero-subtitle {
    font-size: 2rem;
    font-weight: 400;
    margin-bottom: 1.5rem;
    animation: fadeInUp 0.8s ease-out 0.2s both;
    color: #4dd4ff;
    font-family: 'Open Sans', sans-serif;
    text-shadow: 0 2px 8px rgba(0, 163, 224, 0.4);
}

.hero-description {
    font-size: 1.15rem;
    margin-bottom: 2.5rem;
    animation: fadeInUp 0.8s ease-out 0.3s both;
    line-height: 1.8;
    color: #d1dce5;
    max-width: 750px;
    margin-left: auto;
    margin-right: auto;
    font-weight: 300;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

.hero-stats-inline {
    display: flex;
    justify-content: center;
    gap: 3rem;
    margin-bottom: 2.5rem;
    animation: fadeInUp 0.8s ease-out 0.4s both;
}

.stat-inline {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: #4dd4ff;
    line-height: 1;
    margin-bottom: 0.25rem;
    font-family: 'Montserrat', sans-serif;
    text-shadow: 0 2px 10px rgba(0, 163, 224, 0.5);
}

.stat-label {
    font-size: 0.875rem;
    color: #c5d4e0;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    font-weight: 600;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    animation: fadeInUp 0.8s ease-out 0.5s both;
}

.btn {
    padding: 1rem 2.5rem;
    border-radius: 12px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1rem;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: linear-gradient(135deg, #0066cc 0%, #00a3e0 100%);
    color: white;
    box-shadow: 0 4px 20px rgba(0, 102, 204, 0.4);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(0, 102, 204, 0.6);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.5);
    transform: translateY(-2px);
}

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 3;
    animation: fadeInUp 1s ease-out 0.8s both;
}

.mouse {
    width: 26px;
    height: 40px;
    border: 2px solid rgba(255, 255, 255, 0.5);
    border-radius: 15px;
    position: relative;
}

.mouse::before {
    content: '';
    width: 4px;
    height: 8px;
    background: rgba(255, 255, 255, 0.8);
    border-radius: 2px;
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    animation: scroll 1.5s infinite;
}

@keyframes scroll {
    0% {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
    100% {
        opacity: 0;
        transform: translateX(-50%) translateY(12px);
    }
}

/* Section Styles */
section {
    padding: 5rem 0;
}

.section-title {
    font-size: 2.75rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 1rem;
    color: var(--text-dark);
    position: relative;
    letter-spacing: -0.5px;
}

.section-subtitle {
    text-align: center;
    font-size: 1.125rem;
    color: var(--text-light);
    margin-bottom: 3.5rem;
    max-width: 650px;
    margin-left: auto;
    margin-right: auto;
    font-weight: 400;
}

/* About Section */
.about {
    background: var(--bg-light);
}

.about-content {
    max-width: 900px;
    margin: 0 auto;
}

.about-content p {
    font-size: 1.125rem;
    color: var(--text-medium);
    margin-bottom: 1.5rem;
    line-height: 1.9;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.stat {
    text-align: center;
    padding: 2.5rem;
    background: white;
    border-radius: 16px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.stat:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 24px rgba(0, 102, 204, 0.15);
    border-color: var(--primary-color);
}

.stat h3 {
    font-size: 2.75rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    font-weight: 700;
}

.stat p {
    color: var(--text-medium);
    font-size: 1rem;
    font-weight: 600;
}

/* Skills Section */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.skill-category {
    background: white;
    padding: 2.5rem;
    border-radius: 16px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.skill-category::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s;
}

.skill-category:hover::before {
    transform: scaleX(1);
}

.skill-category:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(37, 99, 235, 0.15);
    border-color: var(--primary-color);
}

.skill-category h3 {
    color: var(--primary-color);
    margin-bottom: 1.25rem;
    font-size: 1.35rem;
    font-weight: 700;
}

.skill-category ul {
    list-style: none;
}

.skill-category li {
    padding: 0.65rem 0;
    color: var(--text-medium);
    position: relative;
    padding-left: 1.75rem;
    font-size: 0.975rem;
    line-height: 1.6;
}

.skill-category li:before {
    content: "▸";
    position: absolute;
    left: 0;
    color: var(--accent-color);
    font-weight: bold;
    font-size: 1.1rem;
}

/* Experience Section */
.experience {
    background: var(--bg-light);
}

.timeline {
    max-width: 900px;
    margin: 0 auto;
}

.timeline-item {
    background: white;
    padding: 2.5rem;
    border-radius: 16px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
    border-left: 5px solid var(--primary-color);
    border: 1px solid var(--border-color);
    border-left: 5px solid var(--primary-color);
}

.timeline-date {
    color: var(--primary-color);
    font-weight: 700;
    margin-bottom: 0.75rem;
    font-size: 0.95rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.timeline-content h3 {
    font-size: 1.65rem;
    margin-bottom: 0.35rem;
    color: var(--text-dark);
}

.timeline-content h4 {
    color: var(--text-light);
    font-weight: 600;
    margin-bottom: 1.25rem;
    font-size: 1.1rem;
}

.timeline-content ul {
    margin-left: 1.5rem;
}

.timeline-content li {
    margin-bottom: 0.85rem;
    color: var(--text-medium);
    line-height: 1.8;
    font-size: 0.975rem;
}

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

.project-card {
    background: white;
    padding: 2.5rem;
    border-radius: 16px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(180deg, var(--primary-color), var(--accent-color));
    transform: scaleY(0);
    transform-origin: top;
    transition: transform 0.4s;
}

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

.project-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 20px 40px rgba(37, 99, 235, 0.15);
    border-color: var(--primary-color);
}

.project-card h3 {
    color: var(--text-dark);
    margin-bottom: 0.85rem;
    font-size: 1.35rem;
    font-weight: 700;
}

.project-tech {
    color: var(--primary-color);
    font-weight: 700;
    margin-bottom: 1.1rem;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.project-card p {
    color: var(--text-medium);
    line-height: 1.8;
    font-size: 0.975rem;
}

/* Contact Section */
.contact {
    background: var(--bg-light);
}

.contact-content {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
}

.contact-content > p {
    font-size: 1.125rem;
    color: var(--text-medium);
    margin-bottom: 2.5rem;
}

.contact-info {
    background: white;
    padding: 2.5rem;
    border-radius: 16px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
    border: 1px solid var(--border-color);
}

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

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

.contact-label {
    font-weight: 700;
    color: var(--text-dark);
    min-width: 100px;
    text-align: right;
    font-size: 0.95rem;
}

.contact-item a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.3s;
    font-weight: 600;
}

.contact-item a:hover {
    color: var(--accent-color);
    text-decoration: underline;
}

/* Footer */
.footer {
    background: var(--text-dark);
    color: white;
    text-align: center;
    padding: 2rem 0;
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        gap: 1rem;
        font-size: 0.9rem;
    }

    .hero-title {
        font-size: 3rem;
        letter-spacing: -1px;
    }

    .hero-subtitle {
        font-size: 1.75rem;
    }

    .hero-description {
        font-size: 1rem;
    }

    .hero-stats-inline {
        gap: 1.5rem;
    }

    .stat-number {
        font-size: 2rem;
    }

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

    .btn {
        width: 100%;
        max-width: 300px;
        justify-content: center;
    }

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

    .section-subtitle {
        font-size: 1rem;
    }

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

    .contact-item {
        flex-direction: column;
        text-align: center;
    }

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

    section {
        padding: 4rem 0;
    }
}

@media (max-width: 480px) {
    .nav-brand {
        font-size: 1.25rem;
    }

    .nav-menu {
        display: none;
    }

    .hero-title {
        font-size: 2.25rem;
    }

    .hero-subtitle {
        font-size: 1.25rem;
    }

    .hero-badge {
        font-size: 0.75rem;
        padding: 0.4rem 1rem;
    }

    .hero-stats-inline {
        flex-direction: column;
        gap: 1rem;
    }

    .stat-number {
        font-size: 1.75rem;
    }

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