@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
    --bg-color: #0d1117;
    --text-color: #c9d1d9;
    --desc-text: #8b949e;
    --heading-color: #ffffff;
    --accent-color: #58a6ff;
    --card-bg: #161b22;
    --card-border: #30363d;
    --nav-bg: rgba(13, 17, 23, 0.85);
    --btn-hover-bg: rgba(88, 166, 255, 0.1);
    --transition: all 0.3s ease;
}

[data-theme="light"] {
    --bg-color: #f6f8fa;
    --text-color: #24292f;
    --desc-text: #57606a;
    --heading-color: #0969da;
    --accent-color: #0969da;
    --card-bg: #ffffff;
    --card-border: #d0d7de;
    --nav-bg: rgba(246, 248, 250, 0.85);
    --btn-hover-bg: rgba(9, 105, 218, 0.1);
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Typography styles */
h1, h2, h3 {
    color: var(--heading-color);
    font-weight: 600;
}

a {
    text-decoration: none;
    color: var(--accent-color);
    transition: var(--transition);
}

a:hover {
    color: #79c0ff;
}

/* Navigation */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    padding: 1.5rem 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--nav-bg);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid transparent;
    transition: var(--transition);
}

nav.scrolled {
    padding: 1rem 5%;
    border-bottom-color: var(--card-border);
}

.logo span {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--heading-color);
    letter-spacing: -0.5px;
}

.logo .xyz {
    color: var(--accent-color);
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 2rem;
}

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

.nav-links a {
    color: var(--text-color);
    font-size: 0.95rem;
    font-weight: 500;
}

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

.theme-toggle {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.2rem;
    color: var(--text-color);
    transition: var(--transition);
    padding: 0;
    line-height: 1;
}

/* Make the moon silver instead of yellow */
:root:not([data-theme="light"]) .theme-toggle {
    filter: grayscale(100%) brightness(1.8);
}

.theme-toggle:hover {
    transform: scale(1.1);
}

/* Section Common */
section {
    padding: 6rem 5% 4rem;
    max-width: 1100px;
    margin: 0 auto;
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 2.5rem;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 60%;
    height: 3px;
    background-color: var(--accent-color);
    border-radius: 2px;
}

/* Hero Section */
.hero {
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding-top: 0;
}

.hero p.greeting {
    color: var(--accent-color);
    font-weight: 500;
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.hero h1 {
    font-size: clamp(3rem, 8vw, 5rem);
    line-height: 1.1;
    margin-bottom: 1rem;
    letter-spacing: -1px;
}

.hero h2 {
    font-size: clamp(1.5rem, 4vw, 2.5rem);
    color: var(--desc-text);
    margin-bottom: 1.5rem;
}

.hero p.summary {
    max-width: 600px;
    font-size: 1.1rem;
    margin-bottom: 2.5rem;
}

.btn {
    display: inline-block;
    padding: 0.8rem 1.8rem;
    background-color: transparent;
    border: 1px solid var(--accent-color);
    color: var(--accent-color);
    border-radius: 4px;
    font-weight: 500;
    cursor: pointer;
}

.btn:hover {
    background-color: var(--btn-hover-bg);
}

/* About Grid */
.about-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

/* Skills */
.skills-container {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-top: 1.5rem;
}

.skill-tag {
    background-color: var(--btn-hover-bg);
    color: var(--accent-color);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
    border: 1px solid var(--accent-color);
}

/* Projects */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 2rem;
}

.project-card {
    background-color: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 8px;
    padding: 2rem;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.project-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-color);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

.project-top h3 {
    font-size: 1.4rem;
    margin-bottom: 0.5rem;
}

.project-top .subtitle {
    font-size: 0.9rem;
    color: var(--desc-text);
    margin-bottom: 1rem;
}

.project-desc {
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
    font-family: inherit;
    font-size: 0.85rem;
    color: var(--desc-text);
    margin-top: auto;
}

/* Certifications */
.cert-list {
    list-style: none;
}

.cert-list li {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    padding: 1rem 1.5rem;
    border-radius: 6px;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
}

.cert-list li::before {
    content: '🏆';
    margin-right: 1.2rem;
    font-size: 1.2rem;
}

/* Contact */
.contact-section {
    text-align: center;
    max-width: 600px;
    padding-bottom: 8rem;
}

.contact-section .section-title::after {
    left: 50%;
    transform: translateX(-50%);
}

.contact-section p {
    margin-bottom: 2rem;
}

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

/* Responsive */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    .nav-right {
        gap: 1rem;
    }
    .hero h1 {
        font-size: 2.5rem;
    }
    section {
        padding: 5rem 5% 3rem;
    }
}