:root {
    --bg-color: #f6ebd2;       
    --text-primary: #2c2c2c;  
    --accent: #5e503f;        
    --border-color: #d1ccbd;  
    --nav-line-color: #ccc;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    padding: 0;
    overflow-x: hidden;
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: 'Libre Baskerville', serif;
    /* lined paper texture effect from a image*/
    background-image: url("https://www.transparenttextures.com/patterns/p6.png");
}

nav {
    position: fixed;
    top: 50%;
    right: 40px;
    transform: translateY(-50%);
    z-index: 100;
    font-family: 'Courier New', Courier, monospace; 
}

.side-nav {
    padding: 0px;
    margin: 0px;
    list-style: none;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 15px; 
}

.nav-items {
    display: flex;
    align-items: center;
    cursor: pointer;
    position: relative;    
}

.nav-text {
    font-size: 12px;
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 1px;
    opacity: 0;
    transform: translateX(10px);
    transition: all 0.3s ease;
    margin-right: 15px;
    color: var(--text-primary);
}

.nav-line {
    display: block;
    width: 30px;
    height: 2px;
    background-color: var(--nav-line-color);
    border-radius: 0;
    transition: all 0.4s cubic-bezier(0.25, 1, 0.5, 1);
}

.nav-items:hover .nav-line {
    background-color: var(--accent);
    width: 50px;
}

.nav-items:hover .nav-text {
    opacity: 0.6;
    transform: translateX(0);
}

.nav-items.active .nav-line {
    width: 70px;
    height: 4px;
    background-color: var(--text-primary);
}

.nav-items.active .nav-text {
    opacity: 1;
    transform: translateX(0);
}

section {
    min-height: 100vh;
    padding: 80px 15% 80px 10%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    border-bottom: 1px solid var(--border-color);
    position: relative;
}

.container {
    max-width: 800px;
}

.hero {
    text-align: center;
    align-items: center;
}

.vintage-border {
    border: 3px double var(--text-primary);
    padding: 60px 40px;
    display: inline-block;
}

.subtitle {
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.9rem;
    letter-spacing: 4px;
    margin-bottom: 10px;
}

.hero h1 {
    font-size: clamp(2.5rem, 8vw, 4.5rem);
    margin: 0;
    text-transform: uppercase;
    font-weight: 700;
}

.tagline {
    font-style: italic;
    margin-top: 20px;
    color: var(--accent);
}

.section-title {
    font-size: 2rem;
    text-transform: uppercase;
    letter-spacing: 3px;
    border-bottom: 1px solid var(--text-primary);
    margin-bottom: 40px;
    padding-bottom: 10px;
    width: fit-content;
}

.drop-cap {
    float: left;
    font-size: 5.5rem;
    line-height: 0.8;
    margin-top: 8px;
    margin-right: 12px;
    color: var(--accent);
    font-family: 'Libre Baskerville', serif;
}

.text-block p {
    line-height: 1.8;
    margin-bottom: 20px;
    font-size: 1.1rem;
}

.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.project-card {
    border: 1px solid var(--text-primary);
    padding: 25px;
    background: rgba(255, 255, 255, 0.2); 
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    flex-direction: column;
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: 8px 8px 0px var(--accent);
    background: var(--bg-color);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    border-bottom: 1px dashed var(--text-primary);
    padding-bottom: 15px;
    margin-bottom: 15px;
}

.serial-no {
    font-family: 'Courier New', monospace;
    font-size: 0.7rem;
    font-weight: bold;
    border: 1px solid var(--text-primary);
    padding: 2px 5px;
}

.tech-icons {
    font-size: 1.8rem;
    display: flex;
    gap: 10px;
    color: var(--accent);
}

.project-card h3 {
    margin: 10px 0;
    text-transform: uppercase;
    font-size: 1.2rem;
    letter-spacing: 1px;
}

.project-card p {
    font-size: 0.9rem;
    line-height: 1.5;
    flex-grow: 1;
}

.view-link {
    margin-top: 20px;
    text-decoration: none;
    color: var(--text-primary);
    font-size: 0.8rem;
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.view-link:hover {
    text-decoration: underline;
}

.anatomy-chart {
    position: relative;
    padding-left: 40px;
    margin-top: 50px;
}

.anatomy-chart::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--text-primary); 
}

.anatomy-branch {
    position: relative;
    margin-bottom: 50px;
}

.anatomy-branch::before {
    content: '';
    position: absolute;
    left: -40px;
    top: 15px;
    width: 40px;
    height: 2px;
    background: var(--text-primary);
}

.anatomy-branch::after {
    content: '';
    position: absolute;
    left: -44px;
    top: 12px;
    width: 8px;
    height: 8px;
    background: var(--bg-color);
    border: 2px solid var(--text-primary);
    border-radius: 50%;
}

.branch-label {
    font-family: 'Libre Baskerville', serif;
    font-size: 1.4rem;
    font-style: italic;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 15px;
    color: var(--accent);
}

.branch-content {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
}

.branch-content span {
    font-family: 'Courier New', Courier, monospace;
    font-size: 1rem;
    padding: 5px 15px;
    border: 1px solid var(--border-color);
    background: rgba(0,0,0,0.03);
    position: relative;
    transition: all 0.3s ease;
}

.branch-content span:hover {
    background: var(--text-primary);
    color: var(--bg-color);
    transform: translateX(5px);
}

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

.vintage-btn {
    display: inline-block;
    margin-top: 30px;
    padding: 15px 40px;
    border: 1px solid var(--text-primary);
    background: transparent;
    color: var(--text-primary);
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 2px;
    font-size: 0.8rem;
    font-weight: bold;
    transition: all 0.3s ease;
}

.vintage-btn:hover {
    background-color: var(--text-primary);
    color: var(--bg-color);
    box-shadow: 5px 5px 0px var(--accent);
}

.nav-icon {
    display: none;
    font-size: 1.2rem;
    color: var(--text-primary);
    margin-right: 15px;
}

@media (max-width: 768px) {
    .nav-text {
        display: none !important;
    }

    .nav-icon {
        display: block;
        opacity: 0.4; 
        font-size: 0.8rem;
        transition: all 0.3s ease;
    }

    .nav-items.active .nav-icon {
        opacity: 1;
        transform: scale(1.2);
        color: var(--accent);
    }

    .nav-line {
        width: 10px;
    }
    
    .nav-items.active .nav-line {
        width: 20px;
        background-color: var(--accent);
    }
}

@media (width >= 1320px) {
    .project-grid{
        grid-template-columns: repeat(2, minmax(350px, 1fr));
    }
}