/* ===== CUSTOM CSS VARIABLES ===== */
:root {
    --primary-color: #3B82F6;
    --primary-dark: #2563EB;
    --secondary-color: #64748B;
    --accent-color: #F59E0B;
    --text-dark: #1E293B;
    --text-light: #64748B;
    --bg-light: #F8FAFC;
    --bg-white: #FFFFFF;
    --border-color: #E2E8F0;
    --shadow-light: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-medium: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-large: 0 10px 25px rgba(0, 0, 0, 0.15);
    --gradient-primary: linear-gradient(135deg, #3B82F6 0%, #8B5CF6 100%);
    --gradient-secondary: linear-gradient(135deg, #F59E0B 0%, #EF4444 100%);
}

/* ===== GLOBAL STYLES ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-white);
    overflow-x: hidden;
}

html {
    scroll-behavior: smooth;
}

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

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 1rem;
    position: relative;
}

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

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
}

/* ===== NAVIGATION ===== */
.navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    transition: all 0.3s ease;
    padding: 1rem 0;
}

.navbar-brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color) !important;
    text-decoration: none;
}

.navbar-nav .nav-link {
    color: var(--text-dark) !important;
    font-weight: 500;
    margin: 0 0.5rem;
    padding: 0.5rem 1rem !important;
    border-radius: 8px;
    transition: all 0.3s ease;
    position: relative;
}

.navbar-nav .nav-link:hover {
    color: var(--primary-color) !important;
    background-color: rgba(59, 130, 246, 0.1);
}

.navbar-nav .nav-link.active {
    color: var(--primary-color) !important;
    background-color: rgba(59, 130, 246, 0.1);
}

/* ===== HERO SECTION ===== */
.hero-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    background-attachment: fixed;
    color: white;
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.3);
    z-index: 1;
}

.hero-section .container {
    position: relative;
    z-index: 2;
}

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

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.1;
}

.hero-subtitle {
    font-size: 1.5rem;
    font-weight: 400;
    margin-bottom: 1.5rem;
    color: rgba(255, 255, 255, 0.9);
}

.hero-description {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    color: rgba(255, 255, 255, 0.8);
    max-width: 500px;
}

.hero-buttons {
    margin-bottom: 2rem;
}

.hero-buttons .btn {
    margin: 0.5rem;
    padding: 0.75rem 2rem;
    font-weight: 600;
    border-radius: 50px;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.hero-buttons .btn-primary {
    background: var(--gradient-primary);
    border: none;
    box-shadow: var(--shadow-medium);
}

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

.hero-buttons .btn-outline-primary {
    border: 2px solid white;
    color: white;
    background: transparent;
}

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

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

.social-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background: rgba(255, 255, 255, 0.1);
    color: white;
    border-radius: 50%;
    text-decoration: none;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

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

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
    animation: fadeInRight 1s ease-out 0.3s both;
}

.hero-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 2rem;
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: var(--shadow-large);
}

.code-snippet {
    background: #1a1a1a;
    border-radius: 12px;
    overflow: hidden;
    font-family: 'Fira Code', monospace;
    box-shadow: var(--shadow-large);
}

.code-header {
    background: #2d2d2d;
    padding: 0.75rem 1rem;
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

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

.dot.red { background: #ff5f57; }
.dot.yellow { background: #ffbd2e; }
.dot.green { background: #28ca42; }

.code-body {
    padding: 1.5rem;
    color: #e6e6e6;
    font-size: 0.9rem;
    line-height: 1.6;
}

.code-body .keyword { color: #ff79c6; }
.code-body .variable { color: #8be9fd; }
.code-body .property { color: #50fa7b; }
.code-body .string { color: #f1fa8c; }

/* ===== ABOUT SECTION ===== */
.about-section {
    background: var(--bg-light);
    padding: 5rem 0;
}

.about-image {
    text-align: center;
    margin-bottom: 2rem;
}

.about-image img {
    width: 250px;
    height: 250px;
    object-fit: cover;
    border: 5px solid white;
    box-shadow: var(--shadow-large);
    transition: transform 0.3s ease;
}

.about-image img:hover {
    transform: scale(1.05);
}

.about-content {
    animation: fadeInLeft 1s ease-out;
}

.about-text {
    font-size: 1.1rem;
    color: var(--text-light);
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.about-stats {
    display: flex;
    gap: 2rem;
    margin: 2rem 0;
    flex-wrap: wrap;
}

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

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

.stat-label {
    color: var(--text-light);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* ===== PROJECTS SECTION ===== */
.projects-section {
    padding: 5rem 0;
    background: var(--bg-white);
}

.project-card {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: var(--shadow-light);
    transition: all 0.3s ease;
    height: 100%;
    border: 1px solid var(--border-color);
}

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

.project-image {
    position: relative;
    overflow: hidden;
    height: 200px;
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.project-card:hover .project-image img {
    transform: scale(1.1);
}

.project-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(59, 130, 246, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

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

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

.project-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background: white;
    color: var(--primary-color);
    border-radius: 50%;
    text-decoration: none;
    transition: all 0.3s ease;
}

.project-link:hover {
    transform: scale(1.1);
    color: var(--primary-color);
}

.project-content {
    padding: 1.5rem;
}

.project-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--text-dark);
}

.project-description {
    color: var(--text-light);
    margin-bottom: 1rem;
    line-height: 1.6;
}

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

.tech-tag {
    background: rgba(59, 130, 246, 0.1);
    color: var(--primary-color);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
}

/* ===== SKILLS SECTION ===== */
.skills-section {
    background: var(--bg-light);
    padding: 5rem 0;
}

.skill-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    box-shadow: var(--shadow-light);
    transition: all 0.3s ease;
    height: 100%;
    border: 1px solid var(--border-color);
}

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

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

.skill-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--text-dark);
}

.skill-description {
    color: var(--text-light);
    line-height: 1.6;
}

/* ===== CONTACT SECTION ===== */
.contact-section {
    background: var(--bg-white);
    padding: 5rem 0;
}

.contact-form {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: var(--shadow-medium);
    border: 1px solid var(--border-color);
}

.form-control {
    border: 2px solid var(--border-color);
    border-radius: 10px;
    padding: 0.75rem 1rem;
    font-size: 1rem;
    transition: all 0.3s ease;
    background: var(--bg-light);
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(59, 130, 246, 0.25);
    background: white;
}

.contact-info {
    text-align: center;
    padding: 1.5rem;
}

.contact-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    color: white;
    font-size: 1.5rem;
}

.contact-info h4 {
    color: var(--text-dark);
    margin-bottom: 0.5rem;
}

.contact-info p {
    color: var(--text-light);
    margin: 0;
}

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

.contact-info a:hover {
    color: var(--primary-dark);
}

/* ===== FOOTER ===== */
.footer {
    background: var(--text-dark);
    color: white;
    border-top: 1px solid var(--border-color);
}

.footer-text {
    color: rgba(255, 255, 255, 0.8);
}

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

.footer-social .social-link {
    background: rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.8);
}

.footer-social .social-link:hover {
    background: var(--primary-color);
    color: white;
}

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

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

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

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.25rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .about-stats {
        justify-content: center;
        gap: 1rem;
    }
    
    .hero-buttons .btn {
        display: block;
        width: 100%;
        margin: 0.5rem 0;
    }
    
    .footer-social {
        justify-content: center;
        margin-top: 1rem;
    }
    
    .navbar-nav {
        text-align: center;
        padding-top: 1rem;
    }
    
    .hero-social {
        justify-content: center;
    }
}

@media (max-width: 576px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    .about-image img {
        width: 200px;
        height: 200px;
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .contact-form {
        padding: 1.5rem;
    }
}

/* ===== UTILITY CLASSES ===== */
.text-gradient {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.btn-gradient {
    background: var(--gradient-primary);
    border: none;
    color: white;
    transition: all 0.3s ease;
}

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

/* ===== SCROLL ANIMATIONS ===== */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.6s ease;
}

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

/* ===== LOADING STATES ===== */
.loading {
    position: relative;
    overflow: hidden;
}

.loading::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    animation: loading 1.5s infinite;
}

@keyframes loading {
    0% { left: -100%; }
    100% { left: 100%; }
}