/* --- CSS Variables & Resets --- */
:root {
    --bg-color: #F9F9F9; /* Very light gray */
    --surface-color: #FFFFFF; /* White */
    --surface-color-hover: #F0F0F0; /* Light gray */
    --text-primary: #111111; /* Near black */
    --text-secondary: #555555; /* Medium dark gray */
    --accent-primary: #000000; /* Pure black */
    --accent-secondary: #333333; /* Dark gray */
    --border-color: #E5E5E5;
    --transition-fast: 0.2s ease;
    --transition-normal: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 90px;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* --- Typography --- */
h1, h2, h3, h4 {
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.02em;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color var(--transition-fast), background var(--transition-fast);
}

/* --- Navigation --- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 24px 0;
    background: var(--surface-color);
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
    transition: padding var(--transition-fast);
}

.navbar.scrolled {
    padding: 16px 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.nav-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 3rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: 1px;
    text-transform: uppercase;
}

.logo::before {
    content: '/';
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 2.5rem;
}

.nav-links a {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.nav-links a:hover {
    color: var(--text-primary);
}

/* --- Global Section Styles --- */
.section {
    padding: 120px 3rem;
    max-width: 1400px;
    margin: 0 auto;
}

.section-title {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--text-primary);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 2rem;
    position: relative;
    display: block;
}

.section-title::before {
    content: '/';
}

.section-title::after {
    display: none; /* Remove previous gradient line */
}

/* --- Hero Section --- */
.hero {
    min-height: 85vh;
    display: flex;
    align-items: center;
    position: relative;
    padding-top: 140px;
}

.hero-content {
    max-width: 900px;
    position: relative;
    z-index: 2;
}

.greeting {
    font-size: 0.9rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
}

.greeting::before {
    content: '/';
}

.name {
    font-size: clamp(3rem, 7vw, 6.5rem);
    font-weight: 700;
    margin-bottom: 1rem;
    letter-spacing: -0.03em;
    color: var(--text-primary);
}

.tagline {
    font-size: clamp(1.5rem, 3vw, 2.5rem);
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    letter-spacing: -0.01em;
}

.summary {
    font-size: 1.15rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin-bottom: 3rem;
    line-height: 1.7;
}

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

.btn {
    padding: 0.9rem 2rem;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: inline-block;
    text-align: center;
}

.btn-primary {
    background: var(--text-primary);
    color: var(--surface-color);
    border: 1px solid var(--text-primary);
}

.btn-primary:hover {
    background: #333;
    border-color: #333;
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--text-primary);
}

.btn-secondary:hover {
    background: var(--text-primary);
    color: var(--surface-color);
}

/* Hide hero shape */
.hero-shape {
    display: none;
}

/* --- About Section --- */
.about-container {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 5rem;
    align-items: start;
}

.about-text p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    font-size: 1.25rem;
    line-height: 1.7;
}

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

.skills {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.skill-tag {
    background: transparent;
    color: var(--text-primary);
    padding: 0.6rem 1.2rem;
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 500;
    border: 1px solid var(--border-color);
    transition: border-color var(--transition-fast);
}

.skill-tag:hover {
    border-color: var(--text-primary);
}

/* --- Projects / Experience Section --- */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2.5rem;
}

.project-card {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 8px; /* Slightly rounded, almost flat */
    padding: 2.5rem;
    transition: border-color var(--transition-fast);
    display: flex;
    flex-direction: column;
    box-shadow: none; /* Removing previous shadows */
}

/* Fix inline styles applied from HTML for education cards */
#education .project-card {
    border-color: var(--border-color) !important;
}

.project-card:hover {
    border-color: var(--text-primary);
    transform: none;
}

.project-icon {
    font-size: 2rem;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
}

.project-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.project-card p {
    color: var(--text-secondary);
    margin-bottom: 2rem;
    flex-grow: 1;
    font-size: 1.05rem;
}

.project-card p strong {
    color: var(--text-primary);
}

.project-link {
    color: var(--text-primary);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.95rem;
}

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

.project-card:hover .project-link i {
    transform: translateX(5px);
}

/* --- Contact Section --- */
.contact-box {
    background: var(--surface-color);
    border-radius: 8px;
    padding: 5rem 3rem;
    text-align: center;
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.contact-box::before {
    display: none;
}

.contact-box h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: 1.5rem;
}

.contact-box p {
    color: var(--text-secondary);
    font-size: 1.15rem;
    margin-bottom: 3rem;
    max-width: 600px;
    margin-inline: auto;
    line-height: 1.7;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

.social-btn {
    width: 50px;
    height: 50px;
    border-radius: 50px;
    background: transparent;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    transition: all var(--transition-fast);
}

.social-btn:hover {
    background: var(--text-primary);
    border-color: var(--text-primary);
    color: var(--surface-color);
}

/* --- Footer --- */
footer {
    text-align: center;
    padding: 3rem 2rem;
    color: var(--text-secondary);
    border-top: 1px solid var(--border-color);
    font-size: 0.9rem;
}

/* --- Animations (Scroll Reveal) --- */
.fade-in {
    opacity: 0;
    transform: translateY(15px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.fade-in.appear {
    opacity: 1;
    transform: translateY(0);
}

/* --- Responsive Design --- */
@media (max-width: 900px) {
    .about-container {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
}

@media (max-width: 768px) {
    .nav-content {
        padding: 0 1.5rem;
    }

    .nav-links {
        display: none;
    }
    
    .section {
        padding: 80px 1.5rem;
    }

    .contact-box {
        padding: 3rem 1.5rem;
    }

    .hero {
        padding-top: 120px;
    }
}