/* Base Styles & Variables */
:root {
    /* Colors */
    --primary: #2b2f33;
    --accent: #f2b600;
    --text: #2b2f33;
    --text-muted: #6b6b6b;
    --background: #f7f7f7;
    --white: #ffffff;
    --light-gray: #f0f0f0;
    --border-color: #e0e0e0;
    
    /* Typography */
    --font-heading: 'Montserrat', sans-serif;
    --font-body: 'Open Sans', sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
    
    /* Border radius */
    --border-radius: 8px;
    --border-radius-lg: 12px;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    
    /* Transitions */
    --transition: all 0.3s ease;
}

/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: var(--font-body);
    color: var(--text);
    background-color: var(--background);
    line-height: 1.6;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: var(--spacing-sm);
    color: var(--primary);
}

h1 { 
    font-size: 2.5rem; 
    line-height: 1.2;
    color: var(--white);
}

h2 { 
    font-size: 2rem;
    position: relative;
    padding-bottom: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
}

h2::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 60px;
    height: 4px;
    background-color: var(--accent);
    border-radius: 2px;
}

h3 { 
    font-size: 1.5rem; 
    margin-bottom: var(--spacing-xs);
}

h4 { 
    font-size: 1.25rem; 
    margin-bottom: var(--spacing-xs);
}

p {
    margin-bottom: var(--spacing-sm);
    color: var(--text-muted);
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: var(--transition);
}

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

ul, ol {
    padding-left: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

li {
    margin-bottom: var(--spacing-xs);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

.container {
    display: flex;
    min-height: 100vh;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
    font-family: var(--font-heading);
    text-transform: uppercase;
    font-size: 0.875rem;
    letter-spacing: 0.5px;
}

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

.btn-primary:hover {
    background-color: #e0a800;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-outline {
    background-color: transparent;
    border-color: var(--accent);
    color: var(--accent);
}

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

/* Layout */
.sidebar {
    width: 350px;
    background-color: var(--primary);
    color: var(--white);
    padding: var(--spacing-lg);
    position: fixed;
    height: 100vh;
    overflow-y: auto;
    z-index: 100;
}

.main-content {
    flex: 1;
    margin-left: 350px;
    background-color: var(--background);
}

.section {
    padding: var(--spacing-xl) var(--spacing-lg);
    background-color: var(--white);
    margin-bottom: var(--spacing-md);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
}

/* Profile Section */
.profile {
    text-align: center;
    color: var(--white);
}

.avatar {
    width: 180px;
    height: 180px;
    border-radius: 50%;
    object-fit: cover;
    margin: 0 auto var(--spacing-md);
    border: 4px solid var(--accent);
}

.tagline {
    color: var(--accent);
    font-weight: 500;
    margin-bottom: var(--spacing-md);
    font-size: 1.1rem;
}

.profile-summary {
    text-align: left;
    margin: var(--spacing-lg) 0;
}

.profile-summary h2,
.contact-info h2 {
    color: var(--white);
    text-align: center;
    margin-bottom: var(--spacing-md);
}

.profile-summary h2::after,
.contact-info h2::after {
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--accent);
}

.profile-summary p {
    color: rgba(255, 255, 255, 0.8);
    text-align: left;
}

/* Contact Info */
.contact-info {
    margin-top: var(--spacing-xl);
}

.contact-info ul {
    list-style: none;
    padding: 0;
}

.contact-info li {
    display: flex;
    align-items: flex-start;
    margin-bottom: var(--spacing-sm);
    color: rgba(255, 255, 255, 0.8);
}

.contact-info i {
    margin-right: var(--spacing-sm);
    color: var(--accent);
    width: 20px;
    text-align: center;
    margin-top: 4px;
}

.contact-info a {
    color: rgba(255, 255, 255, 0.8);
    transition: var(--transition);
}

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

/* Navigation */
.main-nav {
    background-color: var(--white);
    padding: var(--spacing-sm) var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 90;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Mobile Navigation Buttons */
.hamburger,
.sidebar-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: var(--border-radius);
    transition: var(--transition);
    min-width: 44px;
    min-height: 44px;
}

.hamburger:hover,
.sidebar-toggle:hover {
    background-color: var(--light-gray);
    color: var(--accent);
}

.hamburger.active,
.sidebar-toggle.active {
    color: var(--accent);
}

/* Sidebar Close Button */
.sidebar-close {
    display: none;
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: none;
    border: none;
    color: var(--white);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: var(--border-radius);
    transition: var(--transition);
    z-index: 10;
    min-width: 44px;
    min-height: 44px;
}

.sidebar-close:hover {
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--accent);
}

.nav-links {
    display: flex;
    justify-content: flex-end;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-links li {
    margin-left: var(--spacing-md);
}

.nav-links a {
    color: var(--text);
    font-weight: 500;
    text-decoration: none;
    transition: var(--transition);
    padding: 0.5rem 0;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: 0;
    left: 0;
    background-color: var(--accent);
    transition: var(--transition);
}

.nav-links a:hover,
.nav-links a:focus,
.nav-links a.active {
    color: var(--accent);
}

.nav-links a:hover::after,
.nav-links a:focus::after,
.nav-links a.active::after {
    width: 100%;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, rgba(43, 47, 51, 0.9) 0%, rgba(43, 47, 51, 0.8) 100%), 
                url('../assets/hero.jpg') no-repeat center center/cover;
    color: var(--white);
    text-align: center;
    padding: var(--spacing-xl);
    position: relative;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    z-index: 2;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: var(--spacing-sm);
    color: var(--white);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.hero .subtitle {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-lg);
    color: var(--accent);
    font-weight: 400;
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.info-chips {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
}

.chip {
    background-color: rgba(255, 255, 255, 0.1);
    padding: 0.5rem 1rem;
    border-radius: 50px;
    font-size: 0.9rem;
    display: inline-flex;
    align-items: center;
    backdrop-filter: blur(5px);
}

/* About Section */
.about-content {
    max-width: 800px;
    margin: 0 auto;
}

.highlights {
    margin: var(--spacing-lg) 0;
}

.highlight-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    list-style: none;
    padding: 0;
    margin: var(--spacing-md) 0;
}

.highlight-list li {
    background-color: var(--light-gray);
    padding: var(--spacing-sm);
    border-radius: var(--border-radius);
    text-align: center;
    font-weight: 500;
    transition: var(--transition);
}

.highlight-list li:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-sm);
}

/* Timeline */
.timeline {
    position: relative;
    padding-left: 30px;
    margin: var(--spacing-xl) 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 7px;
    top: 0;
    bottom: 0;
    width: 2px;
    background-color: var(--accent);
}

.timeline-item {
    position: relative;
    margin-bottom: var(--spacing-lg);
    padding-left: var(--spacing-md);
}

.timeline-dot {
    position: absolute;
    left: -30px;
    top: 0;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background-color: var(--accent);
    border: 3px solid var(--white);
    box-shadow: 0 0 0 2px var(--accent);
}

.timeline-date {
    font-weight: 600;
    color: var(--accent);
    margin-bottom: var(--spacing-xs);
}

/* Skills Section */
.skills-container {
    max-width: 800px;
    margin: 0 auto;
}

.skill {
    margin-bottom: var(--spacing-md);
}

.skill-info {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--spacing-xs);
}

.progress-bar {
    height: 10px;
    background-color: var(--light-gray);
    border-radius: 5px;
    overflow: hidden;
}

.progress {
    height: 100%;
    background-color: var(--accent);
    border-radius: 5px;
    transition: width 1s ease-in-out;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-md);
    margin: var(--spacing-xl) 0;
}

.stat-card {
    background-color: var(--light-gray);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    text-align: center;
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.methodologies {
    margin-top: var(--spacing-xl);
}

.methodology-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.methodology-item {
    background-color: var(--light-gray);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    text-align: center;
    transition: var(--transition);
}

.methodology-item:hover {
    background-color: var(--accent);
    color: var(--primary);
    transform: translateY(-3px);
    box-shadow: var(--shadow-sm);
}

.methodology-item i {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-xs);
    display: block;
}

/* Contact Form */
.contact-container {
    max-width: 600px;
    margin: 0 auto;
}

.contact-form {
    display: grid;
    gap: var(--spacing-md);
}

.form-group {
    margin-bottom: var(--spacing-sm);
}

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

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-family: var(--font-body);
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 2px rgba(242, 182, 0, 0.2);
}

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

.required {
    color: #e74c3c;
}

.contact-alert {
    padding: var(--spacing-sm);
    border-radius: var(--border-radius);
    margin-top: var(--spacing-md);
    display: none;
}

.contact-alert.success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
    display: block;
}

.contact-alert.error {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
    display: block;
}

/* Footer */
.footer {
    background-color: var(--primary);
    color: var(--white);
    padding: var(--spacing-lg);
    text-align: center;
    margin-top: var(--spacing-xl);
}

.social-links {
    margin-top: var(--spacing-md);
}

.social-links a {
    color: var(--white);
    font-size: 1.5rem;
    margin: 0 var(--spacing-xs);
    transition: var(--transition);
}

.social-links a:hover {
    color: var(--accent);
    transform: translateY(-2px);
}

/* Back to Top Button */
.back-to-top {
    position: fixed;
    bottom: var(--spacing-md);
    right: var(--spacing-md);
    width: 50px;
    height: 50px;
    background-color: var(--accent);
    color: var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    box-shadow: var(--shadow-md);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 99;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background-color: var(--primary);
    color: var(--white);
    transform: translateY(-3px);
}

/* Mobile Navigation Styles */
@media (max-width: 1024px) {
    .nav-links {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100vh;
        background-color: rgba(43, 47, 51, 0.95);
        backdrop-filter: blur(10px);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        z-index: 1000;
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
    }
    
    .nav-links.active {
        display: flex;
        opacity: 1;
        visibility: visible;
    }
    
    .nav-links li {
        margin: var(--spacing-sm) 0;
    }
    
    .nav-links a {
        color: var(--white);
        font-size: 1.5rem;
        font-weight: 600;
        padding: var(--spacing-sm) var(--spacing-lg);
        border-radius: var(--border-radius);
        transition: var(--transition);
    }
    
    .nav-links a:hover,
    .nav-links a:focus,
    .nav-links a.active {
        background-color: var(--accent);
        color: var(--primary);
        transform: scale(1.05);
    }
    
    .nav-links a::after {
        display: none;
    }
    
    .hamburger {
        display: block;
        z-index: 1001;
    }
    
    /* Prevent body scroll when menu is open */
    body.no-scroll {
        overflow: hidden;
    }
}

/* Mobile Sidebar Styles */
@media (max-width: 1024px) {
    .container {
        flex-direction: column;
    }
    
    .sidebar {
        width: 350px;
        position: fixed;
        left: -350px;
        top: 0;
        height: 100vh;
        z-index: 1100;
        transition: left 0.3s ease;
        padding: var(--spacing-xl) var(--spacing-lg);
    }
    
    .sidebar.active {
        left: 0;
    }
    
    .sidebar-close {
        display: block;
    }
    
    .sidebar-toggle {
        display: block;
    }
    
    .main-content {
        margin-left: 0;
        width: 100%;
    }
    
    .main-nav {
        justify-content: space-between;
        gap: var(--spacing-sm);
    }
    
    /* Mobile Navigation Button Layout */
    .main-nav {
        display: grid;
        grid-template-columns: auto 1fr auto;
        align-items: center;
        gap: var(--spacing-sm);
    }
    
    .sidebar-toggle {
        grid-column: 1;
    }
    
    .nav-links {
        grid-column: 2;
        justify-self: center;
    }
    
    .hamburger {
        grid-column: 3;
    }
    
    /* Overlay for sidebar */
    .sidebar-overlay {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background-color: rgba(0, 0, 0, 0.5);
        z-index: 1050;
        transition: opacity 0.3s ease;
    }
    
    .sidebar-overlay.active {
        display: block;
    }
}

@media (max-width: 768px) {
    html {
        font-size: 15px;
    }
    
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .hero .subtitle {
        font-size: 1.25rem;
    }
    
    .cta-buttons {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .info-chips {
        flex-direction: column;
        align-items: center;
    }
    
    .highlight-list {
        grid-template-columns: 1fr;
    }
}

/* Print Styles */
@media print {
    .container {
        display: block;
    }
    
    .sidebar, 
    .main-nav,
    .back-to-top,
    .footer {
        display: none;
    }
    
    .main-content {
        margin: 0;
        padding: 0;
    }
    
    .section {
        page-break-inside: avoid;
        border: none;
        box-shadow: none;
        padding: 0;
        margin: 0 0 2rem 0;
    }
    
    h2 {
        page-break-after: avoid;
    }
    
    a[href^='http']::after {
        content: ' (' attr(href) ')';
        font-size: 0.8em;
        font-weight: normal;
    }
    
    .no-print {
        display: none;
    }
}