:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary: #f3f4f6;
    --dark: #111827;
    --light: #ffffff;
    --gray: #6b7280;
    --light-gray: #e5e7eb;
}

[data-theme="dark"] {
    --primary: #3b82f6;
    --primary-dark: #2563eb;
    --secondary: #1f2937;
    --dark: #f9fafb;
    --light: #111827;
    --gray: #9ca3af;
    --light-gray: #374151;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: var(--light);
    color: var(--dark);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Header */
header {
    background-color: var(--light);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 0;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

.nav-links {
    display: flex;
    list-style: none;
}

.nav-links li {
    margin-left: 2rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--dark);
    font-weight: 500;
    transition: color 0.3s;
}

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

.nav-buttons {
    display: flex;
    gap: 1rem;
}

.btn-icon {
    background: none;
    border: none;
    font-size: 1.2rem;
    cursor: pointer;
    padding: 0.3rem;
    border-radius: 50%;
    width: 35px;
    height: 35px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s;
    background-color: var(--secondary);
    color: var(--dark);
}

.btn-icon:hover {
    background-color: var(--primary);
    color: var(--light);
}

/* Hero Section */
.hero {
    padding: 10rem 0 5rem;
    display: flex;
    align-items: center;
    min-height: 100vh;
}

.hero-content {
    max-width: 600px;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hero p {
    font-size: 1.2rem;
    color: var(--gray);
    margin-bottom: 2rem;
}

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

.btn {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    border-radius: 5px;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.3s;
    cursor: pointer;
    border: none;
    font-size: 1rem;
}

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

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

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

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

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

.section-title {
    font-size: 2rem;
    margin-bottom: 2rem;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 50px;
    height: 3px;
    background-color: var(--primary);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
}

.about-info p {
    margin-bottom: 1rem;
}

/* Skills Section */
.skills {
    background-color: var(--secondary);
}

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

.skill-category {
    margin-bottom: 2rem;
}

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

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

.skill-list li {
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
}

.skill-list li::before {
    content: '•';
    color: var(--primary);
    font-weight: bold;
    margin-right: 0.5rem;
}

/* Experience Section */
.experience-container {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.experience-item {
    padding: 2rem;
    background-color: var(--light);
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s;
}

.experience-item:hover {
    transform: translateY(-5px);
}

.experience-title {
    display: flex;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.experience-company {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--primary);
}

.experience-date {
    color: var(--gray);
}

.experience-role {
    font-weight: 600;
    margin-bottom: 1rem;
}

.experience-description ul {
    list-style: none;
}

.experience-description li {
    margin-bottom: 0.5rem;
    position: relative;
    padding-left: 1.5rem;
}

.experience-description li::before {
    content: '→';
    color: var(--primary);
    position: absolute;
    left: 0;
}

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

.contact-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
}

.contact-info p {
    margin-bottom: 1rem;
}

.contact-links {
    margin-top: 1.5rem;
}

.contact-link {
    display: flex;
    align-items: center;
    margin-bottom: 1rem;
    color: var(--dark);
    text-decoration: none;
}

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

.contact-form {
    background-color: var(--light);
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-control {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid var(--light-gray);
    border-radius: 5px;
    font-size: 1rem;
}

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

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

/* Form status messages */
.form-message {
    padding: 1rem;
    margin-top: 1rem;
    border-radius: 5px;
    display: none;
}

.form-message.success {
    background-color: #d1fae5;
    color: #065f46;
    border: 1px solid #34d399;
    display: block;
}

.form-message.error {
    background-color: #fee2e2;
    color: #b91c1c;
    border: 1px solid #f87171;
    display: block;
}

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

/* Media Queries */
@media (max-width: 768px) {
    .about-content,
    .contact-container {
        grid-template-columns: 1fr;
    }
    
    .hero {
        padding: 8rem 0 3rem;
    }
    
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .nav-links {
        display: none;
    }
    
    nav {
        justify-content: space-between;
    }
    
    .nav-buttons {
        margin-left: auto;
    }
}