/* ===== RESET & VARIABLES ===== */
:root {
    /* Koulè */
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --accent-color: #e74c3c;
    --light-color: #ecf0f1;
    --dark-color: #1a1a1a;
    --gray-color: #7f8c8d;
    --light-gray: #f8f9fa;
    
    /* Degrade */
    --gradient-primary: linear-gradient(135deg, var(--primary-color), #34495e);
    --gradient-accent: linear-gradient(135deg, var(--accent-color), #c0392b);
    
    /* Ombre */
    --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, 0.1);
    
    /* Radyis */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --radius-full: 50%;
    
    /* Espasman */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-xxl: 5rem;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    line-height: 1.6;
    color: var(--dark-color);
    background-color: var(--light-color);
    overflow-x: hidden;
}

/* ===== UTILITY CLASSES ===== */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.section {
    padding: var(--space-xxl) 0;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: var(--space-sm);
    text-align: center;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--gray-color);
    text-align: center;
    margin-bottom: var(--space-xl);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-sm) var(--space-lg);
    border-radius: var(--radius-md);
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    border: 2px solid transparent;
    cursor: pointer;
    font-size: 1rem;
}

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

.primary-button:hover,
.primary-button:focus {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    background: linear-gradient(135deg, #34495e, var(--primary-color));
}

.secondary-button {
    background: transparent;
    color: var(--secondary-color);
    border-color: var(--secondary-color);
}

.secondary-button:hover,
.secondary-button:focus {
    background-color: var(--secondary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ===== HEADER & NAVIGATION ===== */
.header {
    background-color: white;
    box-shadow: var(--shadow-sm);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-md) 0;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.menu-toggle {
    display: none;
}

.menu-button {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-xs);
}

.menu-icon {
    width: 24px;
    height: 24px;
    fill: var(--primary-color);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--space-lg);
}

.nav-menu a {
    color: var(--dark-color);
    text-decoration: none;
    font-weight: 500;
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    transition: all 0.3s ease;
}

.nav-menu a:hover,
.nav-menu a:focus {
    color: var(--secondary-color);
    background-color: var(--light-color);
}

/* ===== HERO SECTION ===== */
.hero-section {
    padding-top: calc(var(--space-xxl) * 1.5);
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--space-xl);
    align-items: center;
}

.profile-image-container {
    position: relative;
}

.profile-image {
    width: 100%;
    max-width: 300px;
    height: auto;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    border: 5px solid white;
}

.title {
    font-size: 3rem;
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: var(--space-xs);
}

.subtitle {
    font-size: 1.25rem;
    color: var(--secondary-color);
    margin-bottom: var(--space-lg);
    font-weight: 500;
}

.biography p {
    margin-bottom: var(--space-md);
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--dark-color);
}

/* ===== SERVICES SECTION ===== */
.services-section {
    background-color: white;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-lg);
    margin-top: var(--space-xl);
}

.service-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    box-shadow: var(--shadow-md);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid var(--light-color);
}

.service-card:hover,
.service-card:focus-within {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.service-icon {
    width: 80px;
    height: 80px;
    margin-bottom: var(--space-md);
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    padding: var(--space-sm);
}

.service-icon img {
    width: 40px;
    height: 40px;
    filter: brightness(0) invert(1);
}

.service-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: var(--space-sm);
}

.service-description {
    color: var(--gray-color);
    line-height: 1.7;
}

/* ===== COLLABORATION SECTION ===== */
.collaboration-section {
    background: var(--gradient-primary);
    color: white;
}

.collaboration-section .section-title {
    color: white;
}

.collaboration-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--space-xl);
    align-items: center;
}

.collaboration-description {
    font-size: 1.2rem;
    margin-bottom: var(--space-lg);
    opacity: 0.9;
}

.values-list {
    list-style: none;
    margin-top: var(--space-lg);
}

.values-list li {
    margin-bottom: var(--space-md);
    padding-left: var(--space-lg);
    position: relative;
    line-height: 1.7;
}

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

.values-list strong {
    color: var(--accent-color);
}

.fsf-badge-container {
    text-align: center;
}

.fsf-link {
    display: inline-block;
    transition: transform 0.3s ease;
}

.fsf-link:hover,
.fsf-link:focus {
    transform: scale(1.05);
}

.fsf-badge {
    width: 100%;
    max-width: 200px;
    height: auto;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
}

.fsf-text {
    margin-top: var(--space-md);
    font-size: 0.9rem;
    opacity: 0.8;
}

/* ===== CODE SECTION ===== */
.skills-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
    margin-top: var(--space-xl);
}

.skills-title,
.certifications-title {
    font-size: 1.8rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: var(--space-md);
}

.skills-items {
    list-style: none;
    margin-bottom: var(--space-lg);
}

.skills-items li {
    padding: var(--space-sm);
    margin-bottom: var(--space-xs);
    background-color: var(--light-color);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--secondary-color);
}

.certifications-description {
    color: var(--gray-color);
    margin-bottom: var(--space-lg);
}

.cisco-badges {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.cisco-badge-link {
    display: inline-block;
    transition: transform 0.3s ease;
}

.cisco-badge-link:hover,
.cisco-badge-link:focus {
    transform: scale(1.1);
}

.cisco-badge {
    width: 100px;
    height: 100px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
}

/* ===== BLOG SECTION ===== */
.blog-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-xl);
}

.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-lg);
}

.blog-card {
    background: white;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid var(--light-color);
}

.blog-card:hover,
.blog-card:focus-within {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.blog-card-content {
    padding: var(--space-lg);
}

.blog-date {
    display: inline-block;
    font-size: 0.9rem;
    color: var(--secondary-color);
    font-weight: 500;
    margin-bottom: var(--space-sm);
}

.blog-card-title {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: var(--space-sm);
    line-height: 1.4;
}

.blog-card-excerpt {
    color: var(--gray-color);
    line-height: 1.6;
}

/* ===== CONTACT SECTION ===== */
.contact-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
    margin-top: var(--space-xl);
}

.contact-form {
    background: white;
    padding: var(--space-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.form-group {
    margin-bottom: var(--space-lg);
}

.form-label {
    display: block;
    margin-bottom: var(--space-xs);
    font-weight: 600;
    color: var(--primary-color);
}

.form-input,
.form-textarea {
    width: 100%;
    padding: var(--space-sm);
    border: 2px solid var(--light-color);
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.form-input:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--secondary-color);
}

.form-submit {
    width: 100%;
    padding: var(--space-md);
    font-size: 1.1rem;
}

.social-contact {
    padding: var(--space-xl);
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.social-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: var(--space-xs);
}

.social-description {
    color: var(--gray-color);
    margin-bottom: var(--space-lg);
}

.social-links {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
}

.social-link {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm);
    border-radius: var(--radius-md);
    text-decoration: none;
    color: var(--dark-color);
    background-color: var(--light-color);
    transition: all 0.3s ease;
}

.social-link:hover,
.social-link:focus {
    background-color: var(--secondary-color);
    color: white;
    transform: translateX(5px);
}

.social-icon {
    width: 24px;
    height: 24px;
}

.contact-info {
    padding-top: var(--space-lg);
    border-top: 1px solid var(--light-color);
}

.contact-info-title {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: var(--space-sm);
}

.contact-info p {
    margin-bottom: var(--space-xs);
    color: var(--gray-color);
}

.contact-info a {
    color: var(--secondary-color);
    text-decoration: none;
}

.contact-info a:hover {
    text-decoration: underline;
}

/* ===== FOOTER ===== */
.footer {
    background-color: var(--primary-color);
    color: white;
    padding: var(--space-xl) 0;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--space-xl);
}

.license-info {
    font-size: 0.9rem;
    opacity: 0.8;
}

.license-info a {
    color: var(--accent-color);
    text-decoration: none;
}

.license-info a:hover {
    text-decoration: underline;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.footer-link {
    color: white;
    text-decoration: none;
    opacity: 0.8;
    transition: opacity 0.3s ease;
}

.footer-link:hover,
.footer-link:focus {
    opacity: 1;
    color: var(--accent-color);
}

.copyright {
    font-size: 0.9rem;
    opacity: 0.7;
}

.footer-note {
    margin-top: var(--space-sm);
    font-style: italic;
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 992px) {
    .hero-content,
    .collaboration-content,
    .skills-container,
    .contact-container {
        grid-template-columns: 1fr;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .title {
        font-size: 2.5rem;
    }
}

@media (max-width: 768px) {
    .menu-button {
        display: block;
    }
    
    .menu-toggle:checked ~ .nav-menu {
        display: flex;
    }
    
    .nav-menu {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: white;
        padding: var(--space-md);
        box-shadow: var(--shadow-md);
        border-radius: 0 0 var(--radius-md) var(--radius-md);
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--space-lg);
    }
    
    .blog-header {
        flex-direction: column;
        gap: var(--space-md);
        text-align: center;
    }
}

@media (max-width: 576px) {
    .section {
        padding: var(--space-xl) 0;
    }
    
    .services-grid,
    .blog-grid {
        grid-template-columns: 1fr;
    }
    
    .cisco-badges {
        justify-content: center;
    }
    
    .social-links {
        align-items: center;
    }
    
    .contact-form,
    .social-contact {
        padding: var(--space-lg);
    }
}

/* ===== ACCESSIBILITY ===== */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
}

:focus-visible {
    outline: 3px solid var(--secondary-color);
    outline-offset: 2px;
}

.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--primary-color);
    color: white;
    padding: var(--space-sm);
    text-decoration: none;
    z-index: 1001;
}

.skip-link:focus {
    top: 0;
}

/* ===== PRINT STYLES ===== */
@media print {
    .header,
    .footer,
    .social-contact,
    .button {
        display: none;
    }
    
    body {
        background: white;
        color: black;
        font-size: 12pt;
    }
    
    .section {
        padding: 0;
        margin: 1cm 0;
    }
    
    a {
        color: black;
        text-decoration: underline;
    }
    
    a[href]:after {
        content: " (" attr(href) ")";
        font-size: 10pt;
    }
    
    .profile-image {
        max-width: 150px;
    }
}