/* ============================================
   SEMI-MODERN PROFESSIONAL THEME - RESUME
   ============================================ */

/* CSS Variables - Professional Palette */
:root {
    /* Primary Colors */
    --primary: #3b82f6;
    --primary-light: #60a5fa;
    --primary-dark: #2563eb;
    
    /* Accent Colors */
    --accent: #0ea5e9;
    --accent-light: #38bdf8;
    
    /* Backgrounds */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-card: #ffffff;
    --bg-card-hover: #f1f5f9;
    
    /* Text Colors */
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    
    /* Border & Effects */
    --border-color: #e2e8f0;
    --border-light: #cbd5e1;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -2px rgba(0, 0, 0, 0.04);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
    --shadow-hover: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    --gradient-subtle: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    
    /* Fonts */
    --font-display: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', monospace;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 16px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Header & Navigation */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-sm) var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
    transition: all 0.3s ease;
}

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

.nav-links {
    display: flex;
    gap: var(--spacing-sm);
}

.nav-link {
    font-family: var(--font-body);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    transition: all 0.25s ease;
}

.nav-link:hover {
    color: var(--primary);
    background-color: var(--bg-secondary);
}

/* Main Content */
main {
    padding-top: 80px;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl) var(--spacing-md);
    position: relative;
    background: var(--gradient-subtle);
}

.hero-content {
    max-width: 800px;
    text-align: center;
    z-index: 1;
}

.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: rgba(59, 130, 246, 0.08);
    border: 1px solid rgba(59, 130, 246, 0.15);
    border-radius: var(--radius-lg);
    font-family: var(--font-body);
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--primary);
    margin-bottom: var(--spacing-md);
}

.status-dot {
    width: 8px;
    height: 8px;
    background: var(--primary);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

.hero h1 {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 8vw, 4.5rem);
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.03em;
    line-height: 1.1;
}

.subtitle {
    font-family: var(--font-body);
    font-size: 1.25rem;
    font-weight: 500;
    color: var(--primary);
    margin-bottom: var(--spacing-sm);
}

.description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.cta-group {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

.btn-primary,
.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 2rem;
    font-family: var(--font-body);
    font-size: 0.95rem;
    font-weight: 600;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
    border-radius: var(--radius-md);
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

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

.btn-secondary:hover {
    background: rgba(59, 130, 246, 0.05);
    transform: translateY(-2px);
}

.btn-arrow {
    transition: transform 0.3s ease;
}

.btn-primary:hover .btn-arrow {
    transform: translateX(4px);
}

/* Hero Visual */
.hero-visual {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
}

.neural-network {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 50% 50%, rgba(59, 130, 246, 0.04) 0%, transparent 50%);
}

/* Section Styles */
.section {
    padding: var(--spacing-xl) var(--spacing-md);
    position: relative;
}

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

.section-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
}

.title-number {
    font-family: var(--font-mono);
    font-size: 1rem;
    color: var(--text-muted);
    font-weight: 500;
}

.title-text {
    color: var(--text-primary);
}

.title-line {
    flex: 1;
    height: 1px;
    background: linear-gradient(90deg, var(--border-color), transparent);
}

/* About Section */
.about-content {
    margin-bottom: var(--spacing-lg);
}

.about-text {
    font-size: 1.1rem;
    color: var(--text-secondary);
    line-height: 1.8;
    max-width: 800px;
    margin: 0 auto;
}

/* Education Grid */
.education-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-md);
}

.education-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: var(--spacing-md);
    transition: all 0.3s ease;
    position: relative;
    border-radius: var(--radius-lg);
}

.education-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--gradient-primary);
    border-radius: var(--radius-sm) 0 0 var(--radius-sm);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.education-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--primary-light);
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.education-card:hover::before {
    opacity: 1;
}

.edu-icon {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
}

.education-card h3 {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.edu-degree {
    color: var(--primary);
    font-family: var(--font-body);
    font-size: 0.95rem;
    font-weight: 500;
    margin-bottom: 0.25rem;
}

.edu-date {
    color: var(--text-muted);
    font-family: var(--font-body);
    font-size: 0.85rem;
}

/* Experience Timeline */
.experience-timeline {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.experience-item {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: var(--spacing-md);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: var(--spacing-md);
    transition: all 0.3s ease;
    position: relative;
    border-radius: var(--radius-lg);
}

.experience-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 4px;
    height: 100%;
    background: var(--gradient-primary);
    border-radius: var(--radius-sm) 0 0 var(--radius-sm);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.experience-item:hover {
    background: var(--bg-card-hover);
    border-color: var(--primary-light);
    box-shadow: var(--shadow-md);
    transform: translateX(4px);
}

.experience-item:hover::before {
    opacity: 1;
}

.exp-date {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--primary);
    font-weight: 500;
    padding-top: 0.25rem;
    text-align: right;
}

.exp-content h3 {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.exp-company {
    color: var(--accent);
    font-family: var(--font-body);
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
}

.exp-details {
    list-style: none;
    padding-left: 0;
}

.exp-details li {
    position: relative;
    padding-left: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

.exp-details li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--primary);
    font-weight: bold;
}

/* Skills Grid */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

.skill-category {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
}

.skill-category h3 {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tag {
    display: inline-block;
    padding: 0.4rem 0.8rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    font-family: var(--font-body);
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: all 0.3s ease;
    border-radius: var(--radius-md);
}

.tag:hover {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
    transform: translateY(-2px);
}

/* Projects Grid */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-md);
}

.project-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: var(--spacing-md);
    transition: all 0.3s ease;
    position: relative;
    border-radius: var(--radius-lg);
}

.project-card::after {
    content: '';
    position: absolute;
    bottom: 0;
    right: 0;
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, transparent 50%, var(--accent) 50%);
    border-radius: 0 0 var(--radius-lg) 0;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.project-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--accent-light);
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.project-card:hover::after {
    opacity: 1;
}

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-sm);
}

.project-id {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
}

.project-card h3 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.project-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: var(--spacing-sm);
    line-height: 1.6;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.project-tech span {
    font-family: var(--font-body);
    font-size: 0.75rem;
    font-weight: 500;
    padding: 0.3rem 0.6rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
}

/* Contact Section */
.contact-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.contact-text {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

.contact-links {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    align-items: center;
}

.contact-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 1rem 2rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    text-decoration: none;
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 0.95rem;
    font-weight: 500;
    transition: all 0.3s ease;
    width: 100%;
    max-width: 400px;
    justify-content: center;
    border-radius: var(--radius-md);
}

.contact-link:hover {
    border-color: var(--primary);
    background: var(--bg-card-hover);
    box-shadow: var(--shadow-md);
    transform: translateX(8px);
}

.link-icon {
    font-size: 1.2rem;
    color: var(--primary);
}

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

/* Footer */
footer {
    padding: var(--spacing-md);
    text-align: center;
    border-top: 1px solid var(--border-color);
    background: var(--bg-secondary);
}

.footer-content p {
    font-family: var(--font-body);
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 0.25rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .hero {
        padding: var(--spacing-lg) var(--spacing-sm);
    }
    
    .section {
        padding: var(--spacing-lg) var(--spacing-sm);
    }
    
    .section-title {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-xs);
    }
    
    .title-line {
        width: 100%;
    }
    
    .cta-group {
        flex-direction: column;
        align-items: center;
    }
    
    .btn-primary,
    .btn-secondary {
        width: 100%;
        max-width: 300px;
        justify-content: center;
    }
    
    .education-grid,
    .skills-grid,
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .experience-item {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }
    
    .exp-date {
        text-align: left;
        margin-bottom: var(--spacing-xs);
    }
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--border-light);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-light);
}

/* Selection Styling */
::selection {
    background: var(--primary);
    color: white;
}