:root {
    --primary: #0f172a; /* Deep Navy */
    --accent: #3b82f6;  /* Professional Blue */
    --text-main: #1e293b;
    --text-light: #64748b;
    --bg-light: #ffffff;
    --bg-grey: #f1f5f9;
    --bg-dark: #0f172a;
    --gradient-1: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    --gradient-2: linear-gradient(135deg, #3b82f6 0%, #1e40af 100%);
}

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

body {
    font-family: 'Inter', sans-serif;
    color: var(--text-main);
    line-height: 1.7;
    background: linear-gradient(180deg, #f8fafc 0%, #f1f5f9 50%, #e0e7ff 100%);
    background-attachment: fixed;
    scroll-behavior: smooth;
    min-height: 100vh;
}

.container { width: 90%; max-width: 1100px; margin: 0 auto; }

/* Navigation */
nav {
    padding: 16px 0;
    position: sticky;
    top: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    z-index: 1000;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
}

.nav-flex { display: flex; justify-content: space-between; align-items: center; }
.logo { font-weight: 800; font-size: 1.5rem; color: var(--primary); }
.logo span { color: var(--accent); }
.nav-links { display: flex; list-style: none; gap: 5px; }
.nav-links li { margin-left: 10px; }
.nav-links a { 
    text-decoration: none; 
    color: var(--text-main); 
    font-weight: 500; 
    transition: 0.3s; 
    padding: 8px 12px;
    border-radius: 6px;
}
.nav-links a:hover { 
    color: var(--accent); 
    background: rgba(59, 130, 246, 0.1);
}

/* Hero Section */
.hero { 
    padding: 120px 0 80px 0;
    background: linear-gradient(135deg, rgba(15, 23, 42, 0.95) 0%, rgba(30, 41, 59, 0.95) 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(59, 130, 246, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(59, 130, 246, 0.05) 0%, transparent 50%);
    pointer-events: none;
}

.hero .container {
    position: relative;
    z-index: 1;
}
.intro { color: var(--accent); font-weight: 600; letter-spacing: 1px; }
h1 { font-size: 4rem; color: #ffffff; line-height: 1.1; margin: 10px 0; }
h2.typewriter { font-size: 2.5rem; color: var(--accent); margin: 10px 0 30px 0; font-weight: 700; }
.hero-bio { 
    font-size: 1.25rem; 
    color: #cbd5e1; 
    max-width: 600px; 
    margin: 20px 0 40px 0; 
    line-height: 1.8;
}

.hero-btns { display: flex; gap: 20px; flex-wrap: wrap; }

.btn {
    padding: 14px 28px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    display: inline-block;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.primary { 
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    color: white;
}
.primary:hover { 
    background: var(--gradient-2);
    transform: translateY(-3px); 
    box-shadow: 0 12px 25px rgba(59, 130, 246, 0.3);
}

.secondary { 
    border: 2px solid var(--primary); 
    color: var(--primary); 
    background: transparent;
    font-weight: 600;
}
.secondary:hover {
    background: rgba(59, 130, 246, 0.1);
    border-color: var(--accent);
    color: var(--accent);
    transform: translateY(-3px);
}

/* Sections */
.section-padding { 
    padding: 100px 0;
    background: var(--bg-light);
}
.grey-bg { 
    background: var(--bg-grey);
}
.section-title { 
    font-size: 2rem; 
    margin-bottom: 50px; 
    position: relative; 
    color: var(--primary);
    font-weight: 700;
}
.section-title::after { 
    content: ''; 
    width: 60px; 
    height: 5px; 
    background: var(--gradient-2);
    position: absolute; 
    bottom: -15px; 
    left: 0; 
    border-radius: 3px;
}

/* Skills */
.skills-grid { 
    display: grid; 
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); 
    gap: 30px; 
}
.skill-category { 
    padding: 30px;
    background: white;
    border-radius: 12px;
    border-left: 5px solid var(--accent);
    transition: 0.3s;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
}
.skill-category:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 30px rgba(59, 130, 246, 0.15);
    border-left-color: var(--accent);
}
.skill-category h4 { 
    color: var(--primary); 
    margin-bottom: 10px; 
    font-size: 1.2rem;
    font-weight: 700;
}
.skill-category p { 
    color: var(--text-light); 
    font-size: 0.95rem;
}

/* Projects */
.project-grid { 
    display: grid; 
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); 
    gap: 30px; 
}
.project-card { 
    background: white; 
    border-radius: 12px; 
    overflow: hidden; 
    transition: all 0.3s ease;
    border: 1px solid #e2e8f0;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    position: relative;
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-2);
}

.project-card:hover { 
    transform: translateY(-12px); 
    box-shadow: 0 16px 40px rgba(59, 130, 246, 0.15);
    border-color: var(--accent);
}
.project-content { padding: 30px; }
.tech-stack { 
    font-size: 0.75rem; 
    color: var(--accent); 
    font-weight: 700; 
    text-transform: uppercase; 
    display: inline-block;
    margin-bottom: 12px;
    letter-spacing: 1px;
}
.project-content h4 { 
    margin: 10px 0; 
    font-size: 1.4rem; 
    color: var(--primary);
    font-weight: 700;
}
.project-content p { 
    color: var(--text-light);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* Education Timeline */
.edu-timeline {
    display: grid;
    gap: 20px;
}
.edu-item {
    display: flex;
    gap: 20px;
    padding: 25px;
    background: white;
    border-radius: 12px;
    border-left: 5px solid var(--accent);
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
}
.edu-item:hover {
    transform: translateX(8px);
    box-shadow: 0 8px 25px rgba(59, 130, 246, 0.15);
}
.edu-icon {
    font-size: 2rem;
    min-width: 50px;
    text-align: center;
}
.edu-info h4 {
    color: var(--primary);
    margin-bottom: 5px;
    font-size: 1.1rem;
    font-weight: 700;
}
.edu-institute {
    color: var(--accent);
    font-weight: 600;
    font-size: 0.95rem;
}
.edu-date {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-top: 5px;
}

/* About Section */
.about-content {
    max-width: 800px;
    margin: 0 auto;
    background: white;
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
}
.about-text {
    font-size: 1.1rem;
    color: var(--text-light);
    margin-bottom: 25px;
    line-height: 1.8;
    text-align: justify;
}
.cta-buttons {
    display: flex;
    gap: 15px;
    margin-top: 30px;
    flex-wrap: wrap;
}

/* CV Modal */
.cv-modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(15, 23, 42, 0.85);
    overflow-y: auto;
    backdrop-filter: blur(5px);
}

.cv-modal-content {
    background: white;
    margin: 30px auto;
    padding: 50px;
    border-radius: 16px;
    max-width: 900px;
    position: relative;
    box-shadow: 0 25px 50px rgba(0,0,0,0.3);
    border-top: 5px solid var(--accent);
}

.close-btn {
    position: absolute;
    right: 25px;
    top: 20px;
    font-size: 2.5rem;
    font-weight: bold;
    color: var(--text-light);
    cursor: pointer;
    transition: 0.3s;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: #f1f5f9;
}

.close-btn:hover {
    color: var(--primary);
    background: var(--accent);
    color: white;
    transform: rotate(90deg);
}

.cv-header {
    text-align: center;
    margin-bottom: 40px;
    padding-bottom: 30px;
    border-bottom: 3px solid var(--accent);
}

.cv-header h1 {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: 5px;
    font-weight: 800;
}

.cv-title {
    color: var(--accent);
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 15px;
    letter-spacing: 2px;
}

.cv-contact {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
    font-size: 0.95rem;
}

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

.cv-contact a:hover {
    text-decoration: underline;
    opacity: 0.8;
}

.cv-section {
    margin-bottom: 40px;
}

.cv-section-title {
    font-size: 1.3rem;
    color: var(--primary);
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--accent);
    font-weight: 700;
}

.cv-section p {
    color: var(--text-light);
    margin-bottom: 15px;
    line-height: 1.8;
}

.cv-skills-list {
    list-style: none;
    padding: 0;
}

.cv-skills-list li {
    padding: 12px 0;
    color: var(--text-main);
    border-bottom: 1px solid #e2e8f0;
}

.cv-skills-list strong {
    color: var(--primary);
    font-weight: 700;
}

.cv-project {
    margin-bottom: 30px;
    padding-left: 20px;
    border-left: 4px solid var(--accent);
}

.cv-project h3 {
    color: var(--primary);
    margin-bottom: 5px;
    font-weight: 700;
}

.cv-tech {
    color: var(--accent);
    font-size: 0.95rem;
    margin-bottom: 10px;
    font-weight: 600;
}

.cv-project ul {
    list-style: none;
    padding-left: 0;
}

.cv-project li {
    color: var(--text-light);
    margin-bottom: 8px;
    padding-left: 20px;
    position: relative;
}

.cv-project li:before {
    content: "→";
    position: absolute;
    left: 0;
    color: var(--accent);
    font-weight: bold;
}

.cv-edu-item {
    margin-bottom: 25px;
    padding: 15px;
    background: #f8fafc;
    border-radius: 8px;
    border-left: 4px solid var(--accent);
}

.cv-edu-item h3 {
    color: var(--primary);
    margin-bottom: 5px;
    font-weight: 700;
}

.cv-edu-item p {
    color: var(--text-light);
}

.cv-certs-list {
    list-style: none;
    padding: 0;
}

.cv-certs-list li {
    padding: 12px 0;
    padding-left: 30px;
    color: var(--text-main);
    position: relative;
    border-bottom: 1px solid #e2e8f0;
}

.cv-certs-list li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--accent);
    font-weight: bold;
    font-size: 1.2rem;
}

/* Footer */
footer { 
    padding: 80px 0; 
    background: var(--gradient-1);
    color: white;
    position: relative;
    overflow: hidden;
}

footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(59, 130, 246, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(59, 130, 246, 0.05) 0%, transparent 50%);
    pointer-events: none;
}

footer .container {
    position: relative;
    z-index: 1;
}

footer h2 { 
    font-size: 2.5rem; 
    margin-bottom: 20px;
    font-weight: 700;
}
footer p {
    font-size: 1.1rem;
    margin-bottom: 10px;
    opacity: 0.95;
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin: 40px 0;
    padding: 30px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 12px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 20px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 10px;
    transition: all 0.3s ease;
}

.contact-item:hover {
    background: rgba(59, 130, 246, 0.2);
    transform: translateY(-5px);
}

.contact-icon {
    font-size: 2.5rem;
    display: block;
}

.contact-item div {
    text-align: left;
}

.contact-label {
    font-size: 0.9rem;
    opacity: 0.8;
    margin-bottom: 5px;
}

.contact-value {
    color: white;
    text-decoration: none;
    font-size: 1.1rem;
    font-weight: 600;
    transition: all 0.3s;
    display: inline-block;
}

.contact-value:hover {
    color: #e0e7ff;
    text-decoration: underline;
}
.footer-links { 
    margin: 40px 0; 
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 20px;
}
.footer-links a { 
    color: white; 
    text-decoration: none; 
    opacity: 0.85;
    transition: all 0.3s;
    font-weight: 500;
    padding: 8px 16px;
    border-radius: 6px;
}
.footer-links a:hover { 
    opacity: 1; 
    color: #e0e7ff;
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}
.copyright { 
    margin-top: 40px; 
    font-size: 0.9rem; 
    opacity: 0.6;
    text-align: center;
}

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

/* Contact Form */
.contact-form-container {
    max-width: 700px;
    margin: 0 auto;
}

.form-subtitle {
    font-size: 1.1rem;
    color: var(--text-light);
    text-align: center;
    margin-bottom: 40px;
    line-height: 1.6;
}

.contact-form {
    background: white;
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.08);
    border-top: 5px solid var(--accent);
}

.form-group {
    margin-bottom: 25px;
    display: flex;
    flex-direction: column;
}

.form-group label {
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 8px;
    font-size: 0.95rem;
}

.form-group input,
.form-group textarea {
    padding: 12px 16px;
    border: 2px solid #e2e8f0;
    border-radius: 8px;
    font-family: 'Inter', sans-serif;
    font-size: 1rem;
    color: var(--text-main);
    transition: all 0.3s ease;
    background: #f8fafc;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent);
    background: white;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: #cbd5e1;
}

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

.contact-form .btn {
    width: 100%;
    margin-top: 10px;
    padding: 16px 28px;
    font-size: 1rem;
    letter-spacing: 0.5px;
}

.contact-form .btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

@media (max-width: 768px) {
    h1 { font-size: 2.5rem; }
    .nav-links { 
        display: flex;
        flex-direction: column;
        gap: 10px;
    }
    
    .cv-modal-content {
        padding: 25px;
        margin: 15px;
    }
    
    .cv-header h1 {
        font-size: 1.8rem;
    }
    
    .cv-contact {
        flex-direction: column;
        gap: 10px;
    }
    
    .hero-btns {
        flex-direction: column;
    }
    
    .about-text {
        font-size: 1rem;
    }

    .contact-info {
        grid-template-columns: 1fr;
        gap: 15px;
    }

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

    .contact-item div {
        text-align: center;
    }
}