/* ============================================
   COLORS & THEME - Computer Engineering Style
   ============================================ */
:root {
    /* Primary Colors - Electric Blue & Circuit Green */
    --primary: #00d4ff;
    --primary-dark: #0099cc;
    --accent: #00ff88;
    --accent-dark: #00cc6a;

    /* Background Colors - Professional Textured Gray/Black Theme */
    --bg-primary: #111111;
    --bg-secondary: #161616;
    --bg-card: #1c1c1c;
    --bg-card-hover: #222222;

    /* Text Colors */
    --text-primary: #ffffff;
    --text-secondary: #d1d5db;
    --text-muted: #9ca3af;

    /* Utility Colors */
    --border-color: #333333;
    --shadow-color: rgba(0, 0, 0, 0.5);
    --gradient-1: linear-gradient(135deg, #00d4ff 0%, #0099cc 100%);
    --gradient-2: linear-gradient(135deg, #00ff88 0%, #00cc6a 100%);

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;

    /* Border Radius */
    --radius-sm: 0.5rem;
    --radius-md: 1rem;
    --radius-lg: 1.5rem;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-medium: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* ============================================
   RESET & BASE STYLES
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    background-color: var(--bg-primary);
    /* Fixes top margin/overscroll color */
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background-color: var(--bg-primary);
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
    background-size: 30px 30px;
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* ============================================
   NAVIGATION BAR
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    width: 100%;
    background: rgba(5, 5, 5, 0.98);
    /* Pure Neutral Black */
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    padding: 1rem 0;
    transition: all var(--transition-medium);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo a {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, #ffffff 0%, #d1d5db 100%);
    /* Silver/White Professional */
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    text-decoration: none;
    transition: opacity var(--transition-fast);
}

.nav-logo a:hover {
    opacity: 0.8;
}

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

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-1);
    transition: width var(--transition-medium);
}

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

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

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 0.4rem;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    border-radius: 3px;
    transition: all var(--transition-medium);
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero-section {
    min-height: 100vh;
    padding: 8rem 0 4rem;
    position: relative;
    overflow: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
    padding-top: 2rem;
}



.hero-tag {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid var(--primary);
    padding: 0.5rem 1rem;
    border-radius: 2rem;
    color: var(--primary);
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 1.5rem;
}

.circuit-icon {
    font-size: 1.2rem;
    animation: pulse 2s ease-in-out infinite;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1.5rem;
}

.hero-title u {
    text-decoration-color: blue;
    text-decoration-thickness: 2px;
    text-underline-offset: 4px;
}

.gradient-text {
    background: var(--gradient-1);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Subtle link styling - only visible on hover */
.subtle-link {
    text-decoration: none;
    position: relative;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.subtle-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-1);
    transition: width var(--transition-medium);
}

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

.subtle-link:hover {
    opacity: 0.9;
    filter: brightness(1.1);
}

/* Subtle tag link - slight pop-out effect on hover */
.subtle-tag-link {
    color: inherit;
    text-decoration: none;
    display: inline-block;
    transition: all var(--transition-medium);
    cursor: pointer;
}

.subtle-tag-link:hover {
    transform: scale(1.05);
    text-shadow: 0 0 15px rgba(0, 212, 255, 0.4);
    filter: brightness(1.1);
}

.hero-description {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.8;
}

.hero-stats {
    display: flex;
    gap: 3rem;
    margin-bottom: 2rem;
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    background: var(--gradient-2);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-top: 0.3rem;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.btn {
    padding: 1rem 2rem;
    border-radius: var(--radius-sm);
    text-decoration: none;
    font-weight: 600;
    transition: all var(--transition-medium);
    display: inline-block;
}

.btn-primary {
    background: var(--gradient-1);
    color: var(--bg-primary);
    box-shadow: 0 10px 30px var(--shadow-color);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 40px var(--shadow-color);
}

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

.btn-secondary:hover {
    background: rgba(0, 212, 255, 0.1);
    transform: translateY(-2px);
}

/* Circuit Board Visualization - Enhanced Artistic Design */
.hero-visual {
    position: relative;
    height: 500px;
    margin-top: 2.5px;
}

.circuit-board {
    position: relative;
    width: 100%;
    height: 100%;
    height: 100%;
    height: 100%;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, #111111 0%, #1a1a1a 50%, #222222 100%);
    border: 2px solid rgba(0, 212, 255, 0.3);
    overflow: hidden;
    box-shadow:
        0 0 40px rgba(0, 212, 255, 0.15),
        inset 0 0 60px rgba(0, 100, 150, 0.1);
}

/* Central Microchip */
.microchip {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 120px;
    height: 120px;
    z-index: 10;
}

.chip-core {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #1a1a1a 0%, #0a0a0a 100%);
    border: 3px solid var(--primary);
    border-radius: 8px;
    box-shadow:
        0 0 30px rgba(0, 212, 255, 0.6),
        inset 0 0 20px rgba(0, 212, 255, 0.2);
    animation: chip-pulse 3s ease-in-out infinite;
    position: relative;
}

.chip-core::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 70%;
    height: 70%;
    background: radial-gradient(circle, rgba(0, 212, 255, 0.3) 0%, transparent 70%);
    border-radius: 4px;
    animation: core-glow 2s ease-in-out infinite;
}

.chip-pin {
    position: absolute;
    background: linear-gradient(90deg, var(--accent) 0%, var(--primary) 100%);
    box-shadow: 0 0 10px var(--primary);
}

.chip-pin-top,
.chip-pin-bottom {
    width: 60%;
    height: 4px;
    left: 20%;
}

.chip-pin-left,
.chip-pin-right {
    width: 4px;
    height: 60%;
    top: 20%;
}

.chip-pin-top {
    top: -8px;
}

.chip-pin-bottom {
    bottom: -8px;
}

.chip-pin-left {
    left: -8px;
}

.chip-pin-right {
    right: -8px;
}

/* Circuit Traces */
.circuit-trace {
    position: absolute;
    background: linear-gradient(90deg,
            transparent 0%,
            rgba(0, 212, 255, 0.6) 50%,
            transparent 100%);
    box-shadow: 0 0 10px rgba(0, 212, 255, 0.4);
    animation: trace-glow 3s ease-in-out infinite;
}

/* Horizontal Traces */
.trace-h-1 {
    top: 15%;
    left: 0;
    width: 40%;
    height: 2px;
    animation-delay: 0s;
}

.trace-h-2 {
    top: 30%;
    right: 0;
    width: 35%;
    height: 2px;
    animation-delay: 0.5s;
}

.trace-h-3 {
    top: 60%;
    left: 0;
    width: 30%;
    height: 2px;
    animation-delay: 1s;
}

.trace-h-4 {
    bottom: 25%;
    right: 0;
    width: 45%;
    height: 2px;
    animation-delay: 1.5s;
}

.trace-h-5 {
    bottom: 10%;
    left: 5%;
    width: 40%;
    height: 2px;
    animation-delay: 2s;
}

/* Vertical Traces */
.trace-v-1 {
    top: 0;
    left: 20%;
    width: 2px;
    height: 35%;
    animation-delay: 0.3s;
}

.trace-v-2 {
    top: 0;
    right: 25%;
    width: 2px;
    height: 40%;
    animation-delay: 0.8s;
}

.trace-v-3 {
    bottom: 0;
    left: 15%;
    width: 2px;
    height: 30%;
    animation-delay: 1.3s;
}

.trace-v-4 {
    bottom: 0;
    right: 15%;
    width: 2px;
    height: 45%;
    animation-delay: 1.8s;
}

/* Connection Nodes */
.connection-node {
    position: absolute;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow:
        0 0 15px var(--accent),
        0 0 25px rgba(0, 255, 136, 0.5);
    animation: node-pulse-enhanced 2s ease-in-out infinite;
    z-index: 5;
}

.connection-node::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 20px;
    height: 20px;
    border: 2px solid var(--accent);
    border-radius: 50%;
    opacity: 0;
    animation: node-ripple 2s ease-out infinite;
}

.node-1 {
    top: 15%;
    left: 20%;
    animation-delay: 0s;
}

.node-2 {
    top: 15%;
    right: 25%;
    animation-delay: 0.3s;
}

.node-3 {
    top: 30%;
    left: 35%;
    animation-delay: 0.6s;
}

.node-4 {
    top: 30%;
    right: 35%;
    animation-delay: 0.9s;
}

.node-5 {
    bottom: 25%;
    left: 45%;
    animation-delay: 1.2s;
}

.node-6 {
    bottom: 25%;
    right: 15%;
    animation-delay: 1.5s;
}

.node-7 {
    bottom: 10%;
    left: 5%;
    animation-delay: 1.8s;
}

.node-8 {
    top: 60%;
    left: 0;
    animation-delay: 2.1s;
}

/* Data Flow Indicators */
.data-flow {
    position: absolute;
    width: 8px;
    height: 8px;
    background: var(--primary);
    border-radius: 50%;
    box-shadow: 0 0 20px var(--primary);
    animation: data-flow-move 4s linear infinite;
}

.flow-1 {
    top: 15%;
    left: 0;
    animation-name: flow-horizontal-1;
}

.flow-2 {
    top: 30%;
    right: 0;
    animation-name: flow-horizontal-2;
    animation-delay: 1s;
}

.flow-3 {
    top: 0;
    left: 20%;
    animation-name: flow-vertical-1;
    animation-delay: 2s;
}

.flow-4 {
    bottom: 0;
    right: 15%;
    animation-name: flow-vertical-2;
    animation-delay: 3s;
}

/* Corner Pins */
.corner-pin {
    position: absolute;
    width: 16px;
    height: 16px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    border: 2px solid var(--border-color);
    border-radius: 3px;
    box-shadow: 0 0 15px rgba(0, 212, 255, 0.5);
    animation: pin-glow 2s ease-in-out infinite;
}

.pin-tl {
    top: 15px;
    left: 15px;
    animation-delay: 0s;
}

.pin-tr {
    top: 15px;
    right: 15px;
    animation-delay: 0.5s;
}

.pin-bl {
    bottom: 15px;
    left: 15px;
    animation-delay: 1s;
}

.pin-br {
    bottom: 15px;
    right: 15px;
    animation-delay: 1.5s;
}

/* ============================================
   ENHANCED ANIMATIONS
   ============================================ */
@keyframes chip-pulse {

    0%,
    100% {
        box-shadow:
            0 0 30px rgba(0, 212, 255, 0.6),
            inset 0 0 20px rgba(0, 212, 255, 0.2);
        border-color: var(--primary);
    }

    50% {
        box-shadow:
            0 0 50px rgba(0, 212, 255, 0.9),
            inset 0 0 30px rgba(0, 212, 255, 0.4);
        border-color: var(--accent);
    }
}

@keyframes core-glow {

    0%,
    100% {
        opacity: 0.6;
        transform: translate(-50%, -50%) scale(1);
    }

    50% {
        opacity: 1;
        transform: translate(-50%, -50%) scale(1.1);
    }
}

@keyframes trace-glow {

    0%,
    100% {
        opacity: 0.4;
        box-shadow: 0 0 10px rgba(0, 212, 255, 0.4);
    }

    50% {
        opacity: 0.8;
        box-shadow: 0 0 20px rgba(0, 212, 255, 0.8);
    }
}

@keyframes node-pulse-enhanced {

    0%,
    100% {
        transform: scale(1);
        box-shadow:
            0 0 15px var(--accent),
            0 0 25px rgba(0, 255, 136, 0.5);
    }

    50% {
        transform: scale(1.3);
        box-shadow:
            0 0 25px var(--accent),
            0 0 40px rgba(0, 255, 136, 0.8);
    }
}

@keyframes node-ripple {
    0% {
        opacity: 1;
        transform: translate(-50%, -50%) scale(0.5);
    }

    100% {
        opacity: 0;
        transform: translate(-50%, -50%) scale(2);
    }
}

@keyframes flow-horizontal-1 {
    0% {
        left: 0;
        opacity: 0;
    }

    10% {
        opacity: 1;
    }

    90% {
        opacity: 1;
    }

    100% {
        left: 40%;
        opacity: 0;
    }
}

@keyframes flow-horizontal-2 {
    0% {
        right: 0;
        opacity: 0;
    }

    10% {
        opacity: 1;
    }

    90% {
        opacity: 1;
    }

    100% {
        right: 35%;
        opacity: 0;
    }
}

@keyframes flow-vertical-1 {
    0% {
        top: 0;
        opacity: 0;
    }

    10% {
        opacity: 1;
    }

    90% {
        opacity: 1;
    }

    100% {
        top: 35%;
        opacity: 0;
    }
}

@keyframes flow-vertical-2 {
    0% {
        bottom: 0;
        opacity: 0;
    }

    10% {
        opacity: 1;
    }

    90% {
        opacity: 1;
    }

    100% {
        bottom: 45%;
        opacity: 0;
    }
}

@keyframes pin-glow {

    0%,
    100% {
        box-shadow: 0 0 15px rgba(0, 212, 255, 0.5);
        opacity: 0.8;
    }

    50% {
        box-shadow: 0 0 25px rgba(0, 212, 255, 0.8);
        opacity: 1;
    }
}

/* ============================================
   SECTION STYLES
   ============================================ */
.projects-section,
.courses-section {
    padding: var(--spacing-xl) 0;
    position: relative;
}

/* Professional Section Divider Line - Thick Themed Beam */
.courses-section::before,
.projects-section::before,
.contact-section::before,
.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg,
            transparent 0%,
            var(--primary-dark) 20%,
            var(--accent) 50%,
            var(--primary-dark) 80%,
            transparent 100%);
    box-shadow: 0 0 15px rgba(0, 212, 255, 0.3);
    border-radius: 50%;
    /* Tapered edges effect */
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.section-subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
}

/* ============================================
   PROJECTS GRID
   ============================================ */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.project-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 2rem;
    transition: all var(--transition-medium);
    position: relative;
    overflow: hidden;
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-1);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-medium);
}

.project-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--primary);
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 212, 255, 0.2);
}

.project-card:hover::before {
    transform: scaleX(1);
}

.project-header {
    margin-bottom: 0.5rem;
}

.project-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
}

.project-title-link {
    color: inherit;
    text-decoration: none;
    transition: all var(--transition-medium);
    display: inline-block;
    position: relative;
}

.project-title-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-1);
    transition: width var(--transition-medium);
}

.project-title-link:hover {
    color: var(--primary);
    transform: translateX(3px);
}

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

.project-type {
    display: inline-block;
    padding: 0.25rem 0.6rem;
    border-radius: 0.3rem;
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    border: 1px solid;
    transition: all var(--transition-fast);
    margin-bottom: 1rem;
}

.project-type.academic {
    background: rgba(0, 212, 255, 0.1);
    color: var(--primary);
    border-color: rgba(0, 212, 255, 0.3);
}

.project-type.personal {
    background: rgba(0, 255, 136, 0.1);
    color: var(--accent);
    border-color: rgba(0, 255, 136, 0.3);
}

.project-description {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.7;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.tag {
    background: rgba(0, 212, 255, 0.1);
    color: var(--primary);
    padding: 0.4rem 1rem;
    border-radius: 2rem;
    font-size: 0.85rem;
    font-weight: 500;
    border: 1px solid rgba(0, 212, 255, 0.3);
}

.project-links {
    display: flex;
    gap: 1.4rem;
    flex-wrap: wrap;
    margin-top: 1rem;
    margin-bottom: 1rem;
    align-items: flex-start;
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 1.1rem;
    font-weight: 600;
    padding: 0.75rem 1.5rem;
    border: 1px solid rgba(0, 212, 255, 0.3);
    border-radius: 0.5rem;
    background: rgba(0, 212, 255, 0.05);
    transition: all var(--transition-medium);
}

.project-link:hover {
    color: var(--primary);
    background: rgba(0, 212, 255, 0.15);
    border-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 212, 255, 0.3);
}

.project-link svg {
    transition: transform var(--transition-fast);
}

.project-link:hover svg {
    transform: translateX(3px);
}

/* Remove box styling from project links in course cards */
.course-card .project-link {
    padding: 0;
    border: none;
    border-radius: 0;
    background: transparent;
    font-size: 1.1rem;
}

.course-card .project-link:hover {
    background: transparent;
    border-color: transparent;
    transform: none;
    box-shadow: none;
}

/* ============================================
   SKILLS SECTION
   ============================================ */
.skills-section {
    padding: var(--spacing-lg) 0;
    background: transparent;
}

.skills-categories {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.skill-category {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    transition: all var(--transition-medium);
}

.skill-category:hover {
    border-color: rgba(0, 212, 255, 0.3);
    box-shadow: 0 10px 30px rgba(0, 212, 255, 0.1);
}

.category-header {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    margin-bottom: 1.2rem;
    padding-bottom: 0.8rem;
    border-bottom: 1px solid var(--border-color);
}

.category-icon {
    font-size: 1.5rem;
    filter: grayscale(0.2);
}

.category-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    background: var(--gradient-1);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
    gap: 0.6rem;
}

.skill-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(0, 212, 255, 0.05);
    border: 1px solid rgba(0, 212, 255, 0.15);
    padding: 0.5rem 0.8rem;
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
    cursor: default;
}

.skill-item:hover {
    background: rgba(0, 212, 255, 0.1);
    border-color: var(--primary);
    color: var(--text-primary);
    transform: translateY(-2px);
}

.skill-icon {
    font-size: 0.9rem;
    flex-shrink: 0;
}

/* ============================================
   COURSES GRID
   ============================================ */
/* Alternating Section Backgrounds */
.courses-section {
    background: rgba(0, 0, 0, 0.3);
    /* Subtle dark shift */
}

.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.course-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 2rem;
    transition: all var(--transition-medium);
    position: relative;
}

.course-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 0;
    background: var(--gradient-2);
    transition: height var(--transition-medium);
    border-radius: var(--radius-md) 0 0 var(--radius-md);
}

.course-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--accent);
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 255, 136, 0.15);
}

.course-card:hover::before {
    height: 100%;
}

.course-header-meta {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.course-category {
    display: inline-block;
    padding: 0.25rem 0.6rem;
    border-radius: 0.3rem;
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    border: 1px solid;
    transition: all var(--transition-fast);
}

.course-category.software {
    background: rgba(0, 212, 255, 0.1);
    color: var(--primary);
    border-color: rgba(0, 212, 255, 0.3);
}

.course-category.hardware {
    background: rgba(255, 136, 0, 0.1);
    color: #ff8800;
    border-color: rgba(255, 136, 0, 0.3);
}

.course-category.hybrid {
    background: linear-gradient(90deg, rgba(0, 212, 255, 0.15) 0%, rgba(255, 136, 0, 0.15) 100%);
    color: transparent;
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-image: linear-gradient(90deg, #00d4ff 0%, #ff8800 100%);
    border: 1px solid;
    border-image: linear-gradient(90deg, rgba(0, 212, 255, 0.5), rgba(255, 136, 0, 0.5)) 1;
}

.course-code {
    display: inline-block;
    background: rgba(0, 255, 136, 0.1);
    color: var(--accent);
    padding: 0.4rem 1rem;
    border-radius: 0.5rem;
    font-family: 'JetBrains Mono', monospace;
    font-weight: 600;
    font-size: 1rem;
    border: 1px solid rgba(0, 255, 136, 0.3);
}

.course-code-link {
    color: inherit;
    display: inline-block;
    transition: all var(--transition-medium);
}

.course-code-link::after {
    display: none;
}

.course-code-link:hover {
    transform: translateY(-2px);
    opacity: 1;
    filter: brightness(1.2);
    box-shadow: 0 4px 12px rgba(0, 255, 136, 0.3);
}

.course-title {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.course-description {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.7;
}

/* ============================================
   POSITIONS BAR (Hero Section)
   ============================================ */
.positions-bar {
    margin: 2rem 0 1.5rem;
    padding: 1.5rem 2rem;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.positions-heading {
    font-size: 1rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--primary);
    margin-bottom: 1.2rem;
    padding-bottom: 0.6rem;
    border-bottom: 2px solid rgba(0, 212, 255, 0.2);
    display: inline-block;
}

.positions-list {
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
}

.position-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 0.75rem 1rem;
    border-left: 3px solid rgba(0, 212, 255, 0.25);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    background: rgba(0, 212, 255, 0.03);
    transition: all var(--transition-fast);
}

.position-item:hover {
    border-left-color: var(--primary);
    background: rgba(0, 212, 255, 0.07);
    transform: translateX(4px);
}

.position-icon {
    font-size: 1.3rem;
    line-height: 1;
    flex-shrink: 0;
    margin-top: 0.15rem;
}

.position-text {
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
}

.position-role {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-primary);
}

.position-detail {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.course-highlights {
    margin-bottom: 1.5rem;
}

.highlights-title {
    font-size: 0.9rem;
    color: var(--accent);
    margin-bottom: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

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

.highlights-list li {
    position: relative;
    padding-left: 1.5rem;
    margin-bottom: 0.6rem;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.highlights-list li::before {
    content: '▹';
    position: absolute;
    left: 0;
    color: var(--accent);
    font-weight: bold;
}

.course-skills {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
}

.skill-tag {
    background: rgba(0, 255, 136, 0.1);
    color: var(--accent);
    padding: 0.4rem 0.9rem;
    border-radius: 2rem;
    font-size: 0.8rem;
    font-weight: 500;
    border: 1px solid rgba(0, 255, 136, 0.3);
}

/* ============================================
   CONTACT SECTION
   ============================================ */
.contact-section {
    padding: var(--spacing-xl) 0;
    background: rgba(0, 0, 0, 0.3);
    /* Subtle dark shift */
    position: relative;
}

.contact-content {
    max-width: 800px;
    margin: 0 auto;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    padding: 1.5rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: all var(--transition-medium);
}

.contact-link {
    text-decoration: none;
    color: inherit;
    cursor: pointer;
}

.contact-item:hover {
    background: var(--bg-card-hover);
    border-color: var(--primary);
    transform: translateX(10px);
}

.contact-icon {
    font-size: 2.5rem;
    filter: grayscale(0.3);
    display: flex;
    align-items: center;
    justify-content: center;
}

.contact-logo-img {
    width: 2.5rem;
    height: 2.5rem;
    object-fit: contain;
    display: block;
}

.linkedin-img {
    border-radius: 5px;
    /* Crops white corners */
    transform: scale(1.1);
    /* Slight zoom to ensuring white edges are hidden if any */
}

.contact-item h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.contact-item span,
.contact-item a,
.contact-item p {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
    font-size: 1.1rem;
}

.contact-link:hover span {
    color: var(--primary);
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    background: transparent;
    position: relative;
    /* For the divider */
    padding: 2rem 0;
    text-align: center;
}

.footer p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* ============================================
   ANIMATIONS
   ============================================ */
@keyframes pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.5;
    }
}

@keyframes circuit-flow {

    0%,
    100% {
        opacity: 0.2;
    }

    50% {
        opacity: 0.6;
    }
}

@keyframes node-pulse {

    0%,
    100% {
        transform: scale(1);
        box-shadow: 0 0 20px var(--accent);
    }

    50% {
        transform: scale(1.2);
        box-shadow: 0 0 30px var(--accent);
    }
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 968px) {
    .hero-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .hero-visual {
        height: 300px;
    }

    .hero-title {
        font-size: 2.5rem;
    }

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

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

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: rgba(5, 5, 5, 0.98);
        width: 100%;
        text-align: center;
        transition: left var(--transition-medium);
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.3);
        padding: 2rem 0;
        border-bottom: 1px solid var(--border-color);
    }

    .nav-menu.active {
        left: 0;
    }

    .hamburger {
        display: flex;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-description {
        font-size: 1rem;
    }

    .hero-stats {
        gap: 1.5rem;
    }

    .stat-number {
        font-size: 2rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .contact-item {
        flex-direction: column;
        text-align: center;
    }

    .contact-item:hover {
        transform: translateY(-5px);
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }

    .hero-section {
        padding: 6rem 0 2rem;
    }

    .hero-title {
        font-size: 1.75rem;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .btn {
        width: 100%;
        text-align: center;
    }

    .projects-grid,
    .courses-grid {
        gap: 1.5rem;
    }

    .skills-grid {
        grid-template-columns: 1fr;
        gap: 0.6rem;
    }

    .skill-item {
        font-size: 0.8rem;
        padding: 0.5rem 0.8rem;
    }

    .category-title {
        font-size: 1.1rem;
    }
}