/* ========================================
   CSS Variables & Reset
   ======================================== */
:root {
    --primary-color: #6366f1;
    --secondary-color: #8b5cf6;
    --accent-color: #ec4899;
    --dark-bg: #0f172a;
    --dark-secondary: #1e293b;
    --dark-tertiary: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --gradient-1: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    --gradient-2: linear-gradient(135deg, var(--secondary-color), var(--accent-color));
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.2);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.3);
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--dark-bg);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

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

section {
    padding: 80px 0;
}

/* ========================================
   Navigation
   ======================================== */
.navbar {
    background-color: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(10px);
    padding: 20px 0;
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    box-shadow: var(--shadow-md);
}

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

.logo h2 {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
}

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

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-1);
    transition: var(--transition);
}

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

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

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

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

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

.hamburger .bar {
    width: 25px;
    height: 3px;
    background-color: var(--text-primary);
    margin: 3px 0;
    transition: var(--transition);
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    background: linear-gradient(135deg, var(--dark-bg) 0%, var(--dark-secondary) 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(99, 102, 241, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(139, 92, 246, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 10px;
    line-height: 1.2;
}

.highlight {
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 32px;
    color: var(--text-secondary);
    margin-bottom: 20px;
    min-height: 50px;
}

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

.cursor {
    display: inline-block;
    width: 3px;
    background-color: var(--primary-color);
    animation: blink 0.7s infinite;
}

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

.hero-description {
    font-size: 18px;
    color: var(--text-muted);
    margin-bottom: 30px;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    margin-bottom: 30px;
}

.btn {
    padding: 12px 30px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    display: inline-block;
    border: none;
    cursor: pointer;
    font-size: 16px;
}

.btn-primary {
    background: var(--gradient-1);
    color: white;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
}

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

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

.social-links {
    display: flex;
    gap: 15px;
}

.social-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--dark-secondary);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    transition: var(--transition);
    font-size: 18px;
}

.social-icon:hover {
    background: var(--gradient-1);
    color: white;
    transform: translateY(-3px);
}

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

.image-wrapper {
    position: relative;
    width: 400px;
    height: 400px;
}

.image-wrapper::before {
    content: '';
    position: absolute;
    top: -20px;
    left: -20px;
    right: 20px;
    bottom: 20px;
    background: var(--gradient-1);
    border-radius: 50%;
    z-index: -1;
    opacity: 0.3;
    filter: blur(40px);
}

.image-placeholder {
    width: 100%;
    height: 100%;
    background: var(--dark-secondary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 200px;
    color: var(--primary-color);
    border: 5px solid var(--dark-tertiary);
    box-shadow: var(--shadow-xl);
}

.hero-profile-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
    border: 5px solid var(--dark-tertiary);
    box-shadow: var(--shadow-xl);
}

/* ========================================
   Section Header
   ======================================== */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 10px;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    font-size: 18px;
    color: var(--text-muted);
}

/* ========================================
   About Section
   ======================================== */
.about {
    background-color: var(--dark-secondary);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 60px;
    align-items: center;
}

.about-img-wrapper {
    position: relative;
    width: 100%;
    max-width: 350px;
    height: 350px;
}

.about-img-wrapper::before {
    content: '';
    position: absolute;
    top: -15px;
    left: -15px;
    right: 15px;
    bottom: 15px;
    background: var(--gradient-2);
    border-radius: 20px;
    z-index: -1;
    opacity: 0.3;
}

.about-img-wrapper .image-placeholder {
    width: 100%;
    height: 100%;
    background: var(--dark-tertiary);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 120px;
    color: var(--secondary-color);
    box-shadow: var(--shadow-lg);
}

.about-text h3 {
    font-size: 32px;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.about-text p {
    font-size: 16px;
    color: var(--text-muted);
    margin-bottom: 20px;
    line-height: 1.8;
}

.skills {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-top: 30px;
}

.skill-item {
    background-color: var(--dark-tertiary);
    padding: 20px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    gap: 15px;
    transition: var(--transition);
}

.skill-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    background: var(--gradient-1);
}

.skill-item i {
    font-size: 28px;
    color: var(--primary-color);
}

.skill-item:hover i {
    color: white;
}

.skill-item span {
    font-size: 16px;
    font-weight: 600;
}

/* ========================================
   Services Section
   ======================================== */
.services {
    background-color: var(--dark-bg);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
}

.service-card {
    background-color: var(--dark-secondary);
    padding: 40px 30px;
    border-radius: 15px;
    transition: var(--transition);
    border: 1px solid var(--dark-tertiary);
}

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

.service-icon {
    width: 70px;
    height: 70px;
    background: var(--gradient-1);
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    font-size: 32px;
    color: white;
}

.service-card h3 {
    font-size: 24px;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.service-card p {
    color: var(--text-muted);
    margin-bottom: 20px;
    line-height: 1.8;
}

.service-features {
    list-style: none;
}

.service-features li {
    padding: 8px 0;
    color: var(--text-secondary);
    position: relative;
    padding-left: 25px;
}

.service-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

/* ========================================
   Portfolio Section
   ======================================== */
.portfolio {
    background-color: var(--dark-secondary);
}

.portfolio-filters {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 10px 25px;
    background-color: var(--dark-tertiary);
    color: var(--text-secondary);
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--gradient-1);
    color: white;
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.portfolio-item {
    border-radius: 15px;
    overflow: hidden;
    position: relative;
    transition: var(--transition);
}

.portfolio-image {
    position: relative;
    overflow: hidden;
    height: 300px;
}

.portfolio-placeholder {
    width: 100%;
    height: 100%;
    background: var(--dark-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 80px;
    color: var(--primary-color);
}

.portfolio-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.95), rgba(139, 92, 246, 0.95));
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
    padding: 20px;
}

.portfolio-item:hover .portfolio-overlay {
    opacity: 1;
}

.portfolio-overlay h3 {
    font-size: 24px;
    margin-bottom: 10px;
    color: white;
}

.portfolio-overlay p {
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 20px;
}

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

.portfolio-link:hover {
    transform: scale(1.1);
}

.portfolio-screenshot {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.portfolio-item:hover .portfolio-screenshot {
    transform: scale(1.05);
}

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

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 60px;
}

.contact-info h3 {
    font-size: 32px;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.contact-info > p {
    color: var(--text-muted);
    margin-bottom: 30px;
    line-height: 1.8;
}

.contact-details {
    margin-bottom: 30px;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    margin-bottom: 25px;
    padding: 20px;
    background-color: var(--dark-secondary);
    border-radius: 10px;
    transition: var(--transition);
}

.contact-item:hover {
    transform: translateX(10px);
    border-left: 3px solid var(--primary-color);
}

.contact-item i {
    font-size: 24px;
    color: var(--primary-color);
    width: 40px;
    height: 40px;
    background-color: var(--dark-tertiary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-item h4 {
    font-size: 18px;
    margin-bottom: 5px;
    color: var(--text-primary);
}

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

.social-links-contact {
    display: flex;
    gap: 15px;
}

.contact-form {
    background-color: var(--dark-secondary);
    padding: 40px;
    border-radius: 15px;
    box-shadow: var(--shadow-lg);
}

.form-group {
    margin-bottom: 20px;
}

.form-control {
    width: 100%;
    padding: 15px;
    background-color: var(--dark-tertiary);
    border: 2px solid transparent;
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 16px;
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-control::placeholder {
    color: var(--text-muted);
}

textarea.form-control {
    resize: vertical;
    min-height: 150px;
}

/* ========================================
   Footer
   ======================================== */
.footer {
    background-color: var(--dark-secondary);
    padding: 30px 0;
    border-top: 1px solid var(--dark-tertiary);
}

.footer-content {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.footer-text p {
    color: var(--text-muted);
}

.footer-links {
    display: flex;
    gap: 25px;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
}

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

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: var(--dark-secondary);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow-lg);
        padding: 20px 0;
    }

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

    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-title {
        font-size: 36px;
    }

    .hero-subtitle {
        font-size: 24px;
    }

    .hero-buttons {
        justify-content: center;
        flex-wrap: wrap;
    }

    .social-links {
        justify-content: center;
    }

    .image-wrapper {
        width: 300px;
        height: 300px;
    }

    .image-placeholder {
        font-size: 150px;
    }

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

    .about-img-wrapper {
        margin: 0 auto;
    }

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

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

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

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

    .footer-content {
        flex-direction: column;
        text-align: center;
    }

    .section-title {
        font-size: 32px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 28px;
    }

    .hero-subtitle {
        font-size: 20px;
    }

    .section-title {
        font-size: 28px;
    }

    .contact-form {
        padding: 25px;
    }
}