/* ============================================
   Terminal-Inspired Portfolio Stylesheet
   Dark-first design with optional light theme
   ============================================ */

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

:root {
    /* Dark Theme (Default) */
    --bg-primary: #0a0a0a;
    --bg-secondary: #111111;
    --bg-tertiary: #1a1a1a;
    --bg-card: #151515;
    
    --text-primary: #e0e0e0;
    --text-secondary: #a0a0a0;
    --text-muted: #666666;
    
    --accent-color: #00ff88;
    --accent-glow: rgba(0, 255, 136, 0.3);
    --accent-hover: #00cc6f;
    
    --border-color: #2a2a2a;
    --border-hover: #3a3a3a;
    
    --prompt-color: #00ff88;
    --command-color: #ffffff;
    
    /* Typography */
    --font-mono: 'JetBrains Mono', 'Courier New', monospace;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
    --spacing-2xl: 6rem;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
}

[data-theme="light"] {
    --bg-primary: #fafafa;
    --bg-secondary: #f5f5f5;
    --bg-tertiary: #eeeeee;
    --bg-card: #ffffff;
    
    --text-primary: #1a1a1a;
    --text-secondary: #4a4a4a;
    --text-muted: #888888;
    
    --accent-color: #0066cc;
    --accent-glow: rgba(0, 102, 204, 0.2);
    --accent-hover: #0052a3;
    
    --border-color: #e0e0e0;
    --border-hover: #d0d0d0;
    
    --prompt-color: #0066cc;
    --command-color: #1a1a1a;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.7;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background-color 0.3s ease, color 0.3s ease;
    position: relative;
}

/* Subtle grain texture */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 400 400' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)' opacity='0.03'/%3E%3C/svg%3E");
    pointer-events: none;
    z-index: 1;
    opacity: 0.5;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    position: relative;
    z-index: 2;
}

/* ============================================
   Navigation
   ============================================ */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: rgba(10, 10, 10, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    padding: var(--spacing-sm) 0;
    transition: all var(--transition-base);
}

[data-theme="light"] .navbar {
    background-color: rgba(250, 250, 250, 0.8);
}

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

.nav-brand {
    font-family: var(--font-mono);
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-prompt {
    color: var(--prompt-color);
}

.nav-name {
    color: var(--command-color);
}

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

.nav-link {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--text-secondary);
    text-decoration: none;
    text-transform: lowercase;
    transition: color var(--transition-fast);
    position: relative;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background-color: var(--accent-color);
    transition: width var(--transition-fast);
}

.nav-link:hover::after {
    width: 100%;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.theme-toggle {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-secondary);
    background: none;
    border: 1px solid var(--border-color);
    padding: 0.5rem 1rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-transform: lowercase;
}

.theme-toggle:hover {
    color: var(--accent-color);
    border-color: var(--accent-color);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background-color: var(--text-primary);
    transition: all var(--transition-fast);
}

/* ============================================
   Hero Section
   ============================================ */

.hero {
    padding-top: 120px;
    padding-bottom: var(--spacing-2xl);
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 400px;
    gap: var(--spacing-xl);
    align-items: center;
}

.hero-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.hero-intro {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

.terminal-prompt {
    color: var(--prompt-color);
    margin-right: 0.5rem;
}

.terminal-command {
    color: var(--command-color);
}

.hero-name {
    font-family: var(--font-mono);
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.hero-title {
    font-size: 1.25rem;
    color: var(--text-secondary);
    font-weight: 400;
}

.hero-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    line-height: 1.8;
    max-width: 600px;
}

.hero-links {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.hero-link {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--text-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
}

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

.link-prefix,
.link-suffix {
    color: var(--text-muted);
}

@keyframes heroGlow {
    0% {
      text-shadow: 0 0 0 rgba(0, 255, 153, 0);
      opacity: 0.9;
    }
    50% {
      text-shadow:
        0 0 6px var(--accent-color),
        0 0 14px color-mix(in srgb, var(--accent-color) 70%, transparent);
      opacity: 1;
    }
    100% {
      text-shadow: 0 0 0 rgba(0, 255, 153, 0);
      opacity: 0.9;
    }
  }
  
  .hero-link {
    animation: heroGlow 3.5s ease-in-out infinite;
  }
  
  .hero-link:hover {
    animation-play-state: paused;
    text-shadow:
      0 0 8px var(--accent-color),
      0 0 20px color-mix(in srgb, var(--accent-color) 70%, transparent);
  }
  
  .hero-link:hover .link-prefix,
  .hero-link:hover .link-suffix {
    color: var(--accent-color);
  }

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.image-container {
    width: 360px;
    height: 360px;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    position: relative;
    transition: border-color var(--transition-base);
}

.image-container:hover {
    border-color: var(--accent-color);
    box-shadow: 0 0 20px var(--accent-glow);
}

.profile-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

/* ============================================
   Sections
   ============================================ */

.section {
    padding: var(--spacing-2xl) 0;
    border-top: 1px solid var(--border-color);
}

.section-heading {
    font-family: var(--font-mono);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.section-content {
    max-width: 900px;
}

.section-content p {
    margin-bottom: var(--spacing-md);
    color: var(--text-secondary);
    line-height: 1.8;
}

.section-content p:last-child {
    margin-bottom: 0;
}

/* ============================================
   Experience Section
   ============================================ */

.experience-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.experience-item {
    padding: var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background-color: var(--bg-card);
    transition: all var(--transition-base);
}

.experience-item:hover {
    border-color: var(--border-hover);
    box-shadow: 0 0 0 1px var(--border-hover);
}

.exp-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xs);
}

.exp-title {
    font-family: var(--font-mono);
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    flex: 1;
}

.exp-date {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--text-muted);
    white-space: nowrap;
}

.exp-company {
    font-size: 1rem;
    color: var(--accent-color);
    margin-bottom: var(--spacing-xs);
}

.exp-description {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-top: var(--spacing-xs);
}

/* ============================================
   Projects Section
   ============================================ */

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--spacing-md);
}

.project-card {
    padding: var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background-color: var(--bg-card);
    transition: all var(--transition-base);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
      background: color-mix(in srgb, var(--bg-card) 85%, transparent);
  backdrop-filter: blur(8px);
}

.project-card:hover {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 1px var(--accent-color), 0 0 20px var(--accent-glow);
}

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

.project-name {
    font-family: var(--font-mono);
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    flex: 1;
}

.project-links {
    display: flex;
    gap: var(--spacing-xs);
    flex-shrink: 0;
}

.project-link {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

.project-description {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.7;
    flex: 1;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-xs);
}

.tech-tag {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    padding: 0.25rem 0.75rem;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 2px;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.project-card:hover .tech-tag {
    border-color: var(--accent-color);
    color: var(--accent-color);
}

/* ============================================
   Skills Section
   ============================================ */

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

.skill-category {
    padding: var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background-color: var(--bg-card);
}

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

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.skill-tag {
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    padding: 0.375rem 0.75rem;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 2px;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.skill-category:hover .skill-tag {
    border-color: var(--accent-color);
    color: var(--accent-color);
}

/* ============================================
   Education Section
   ============================================ */

.education-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.education-item {
    padding: var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background-color: var(--bg-card);
}

.edu-title {
    font-family: var(--font-mono);
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.edu-school {
    font-size: 1rem;
    color: var(--accent-color);
    margin-bottom: var(--spacing-xs);
}

.edu-period {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--text-muted);
}

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

.cert-title {
    font-family: var(--font-mono);
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.cert-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.cert-item {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background-color: var(--bg-card);
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.cert-name {
    font-family: var(--font-mono);
    font-size: 0.9375rem;
    color: var(--text-primary);
}

.cert-issuer {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* ============================================
   Contact Section
   ============================================ */

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.contact-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background-color: var(--bg-card);
    text-decoration: none;
    transition: all var(--transition-base);
    font-family: var(--font-mono);
    font-size: 0.9375rem;
}

.contact-link:hover {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 1px var(--accent-color);
}

.contact-link .link-prefix,
.contact-link .link-suffix {
    color: var(--text-muted);
}

.contact-value {
    color: var(--text-secondary);
    margin-left: auto;
}

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

/* ============================================
   Footer
   ============================================ */

.footer {
    padding: var(--spacing-xl) 0;
    border-top: 1px solid var(--border-color);
    margin-top: var(--spacing-2xl);
}

.footer-text {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--text-muted);
    text-align: center;
}

.footer-command {
    color: var(--text-secondary);
    margin-left: 0.5rem;
}

/* ============================================
   Responsive Design
   ============================================ */

@media (max-width: 968px) {
    .hero .container {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

    .hero-image {
        order: -1;
        justify-content: flex-start;
    }

    .image-container {
        width: 280px;
        height: 280px;
    }

    .nav-menu {
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        background-color: var(--bg-primary);
        flex-direction: column;
        padding: var(--spacing-md);
        border-bottom: 1px solid var(--border-color);
        transform: translateX(-100%);
        transition: transform var(--transition-base);
    }

    .nav-menu.active {
        transform: translateX(0);
    }

    .nav-toggle {
        display: flex;
    }

    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }
}

@media (max-width: 640px) {
    .container {
        padding: 0 var(--spacing-sm);
    }

    .hero {
        padding-top: 100px;
        padding-bottom: var(--spacing-xl);
    }

    .section {
        padding: var(--spacing-xl) 0;
    }

    .projects-grid {
        grid-template-columns: 1fr;
    }

    .skills-grid {
        grid-template-columns: 1fr;
    }

    .exp-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .image-container {
        width: 240px;
        height: 240px;
    }
}