/* ========== Global Styles ========== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --accent-color: #e74c3c;
    --light-bg: #ecf0f1;
    --dark-text: #2c3e50;
    --light-text: #7f8c8d;
    --white: #ffffff;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

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

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ========== Navigation ========== */
.navbar {
    background-color: var(--primary-color);
    color: var(--white);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow);
}

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

.nav-brand {
    font-size: 1.8rem;
    font-weight: bold;
    color: var(--secondary-color);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-link {
    color: var(--white);
    text-decoration: none;
    cursor: pointer;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    transition: var(--transition);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    background-color: var(--secondary-color);
    color: var(--white);
}

/* ========== Sections ========== */
.section {
    display: none;
    padding: 3rem 0;
    min-height: calc(100vh - 200px);
    animation: fadeIn 0.5s ease;
}

.section.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

h2 {
    font-size: 2.5rem;
    margin-bottom: 2rem;
    color: var(--primary-color);
    border-bottom: 3px solid var(--secondary-color);
    padding-bottom: 1rem;
}

.cv-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 2rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.cv-header h2 {
    margin-bottom: 0;
    flex: 1;
    min-width: 200px;
}

.btn-download {
    padding: 0.8rem 1.5rem;
    background-color: var(--secondary-color);
    color: var(--white);
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}

.btn-download:hover {
    background-color: var(--accent-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

/* ========== Home Section ========== */
.home-content {
    padding: 2rem;
}

.profile-section {
    display: flex;
    gap: 3rem;
    align-items: center;
    background-color: var(--white);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.photo-container {
    flex: 0 0 250px;
    text-align: center;
    position: relative;
}

#profilePhoto {
    width: 200px;
    height: 200px;
    border-radius: 12px;
    object-fit: cover;
    border: 4px solid var(--secondary-color);
    display: block;
    margin: 0 auto 1rem;
    box-shadow: var(--shadow);
}

.intro-text {
    flex: 1;
}

.intro-text h1 {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.intro-text p {
    font-size: 1.1rem;
    color: var(--light-text);
    margin-bottom: 1rem;
    line-height: 1.8;
}

/* ========== CV Section ========== */
.cv-section {
    margin-bottom: 3rem;
    background-color: var(--white);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.cv-section h3 {
    font-size: 1.8rem;
    color: var(--secondary-color);
    margin-bottom: 1.5rem;
    border-left: 4px solid var(--secondary-color);
    padding-left: 1rem;
}

.cv-item {
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--light-bg);
}

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

.cv-item h4 {
    font-size: 1.3rem;
    color: var(--dark-text);
    margin-bottom: 0.5rem;
}

.institution,
.company {
    color: var(--secondary-color);
    font-weight: 600;
    font-size: 0.95rem;
    margin-bottom: 0.5rem;
}

.description {
    color: var(--light-text);
    line-height: 1.8;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
}

.skill-tag {
    background-color: var(--secondary-color);
    color: var(--white);
    padding: 0.8rem 1.5rem;
    border-radius: 20px;
    text-align: center;
    font-weight: 600;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.skill-tag:hover {
    background-color: var(--accent-color);
    transform: translateY(-3px);
}

/* ========== Contact Section ========== */
.contact-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-top: 2rem;
}

.contact-info {
    background-color: var(--white);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.contact-info h3 {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.info-item {
    margin-bottom: 1.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--light-bg);
}

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

.info-item strong {
    color: var(--secondary-color);
    display: block;
    margin-bottom: 0.5rem;
}

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

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

.social-link {
    display: inline-block;
    padding: 0.6rem 1.2rem;
    background-color: var(--secondary-color);
    color: var(--white);
    text-decoration: none;
    border-radius: 6px;
    font-size: 0.9rem;
    transition: var(--transition);
}

.social-link:hover {
    background-color: var(--accent-color);
}

/* ========== Contact Form ========== */
.contact-form {
    background-color: var(--white);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: var(--shadow);
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--dark-text);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

.btn-submit {
    width: 100%;
    padding: 1rem;
    background-color: var(--secondary-color);
    color: var(--white);
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.btn-submit:hover {
    background-color: var(--accent-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

/* ========== Footer ========== */
.footer {
    background-color: var(--primary-color);
    color: var(--white);
    text-align: center;
    padding: 2rem;
    margin-top: 3rem;
}

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

    .profile-section {
        flex-direction: column;
        text-align: center;
    }

    .photo-container {
        flex: none;
    }

    .intro-text h1 {
        font-size: 1.8rem;
    }

    h2 {
        font-size: 1.8rem;
    }

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

    .skills-grid {
        grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    }
}

@media (max-width: 600px) {
    .nav-menu {
        gap: 0.5rem;
    }

    .nav-link {
        padding: 0.5rem 0.7rem;
        font-size: 0.9rem;
    }

    .nav-brand {
        font-size: 1.3rem;
    }

    .section {
        padding: 1.5rem 0;
    }

    .cv-section,
    .contact-info,
    .contact-form {
        padding: 1rem;
    }

    #profilePhoto {
        width: 150px;
        height: 150px;
    }
}