@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Intel+One+Mono:ital,wght@0,300;0,400;0,500;0,700;1,300;1,400;1,500;1,700&display=swap');

:root {
    /* Fonts */
    --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --font-mono: 'Intel One Mono', 'Fira Code', 'Roboto Mono', monospace;

    /* Transition */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Default Theme (Dark Mode) */
body, body.dark-mode {
    --bg: #0A0A0A;
    --bg-card: #121212;
    --text-primary: #EDEDED;
    --text-secondary: #8E8E93;
    --border: #222222;
    --border-hover: #444444;
    --accent: #FFFFFF;
    --accent-bg: #FFFFFF;
    --accent-text: #000000;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
    --dot-color: #34C759;
    --chart-invert: invert(0.9) hue-rotate(180deg) brightness(1.2);
}

/* Light Theme overrides */
body.light-mode {
    --bg: #F9F9F9;
    --bg-card: #FFFFFF;
    --text-primary: #171717;
    --text-secondary: #6B7280;
    --border: #E5E7EB;
    --border-hover: #D1D5DB;
    --accent: #000000;
    --accent-bg: #000000;
    --accent-text: #FFFFFF;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
    --dot-color: #28CD41;
    --chart-invert: grayscale(1) contrast(1.2);
}

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

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg);
    color: var(--text-primary);
    font-family: var(--font-sans);
    line-height: 1.5;
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
    padding-bottom: 4rem;
}

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

/* App Container */
.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Navigation Header */
.header-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 2rem 0;
    border-bottom: 1px solid var(--border);
    margin-bottom: 3.5rem;
}

.nav-brand {
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: -0.5px;
    color: var(--text-primary);
}

.nav-brand span {
    color: var(--text-secondary);
    font-weight: 400;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    font-weight: 500;
}

.nav-link {
    color: var(--text-secondary);
    padding: 0.25rem 0.5rem;
}

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

.nav-separator {
    color: var(--border);
    user-select: none;
}

/* Theme Toggle Button */
.theme-toggle-btn {
    background: none;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    cursor: pointer;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.theme-toggle-btn:hover {
    color: var(--text-primary);
    border-color: var(--border-hover);
    background-color: var(--bg-card);
}

body.dark-mode .sun-icon {
    display: block;
}
body.dark-mode .moon-icon {
    display: none;
}
body.light-mode .sun-icon {
    display: none;
}
body.light-mode .moon-icon {
    display: block;
}

/* Hero Section */
.hero-section {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-bottom: 4rem;
}

.hero-title {
    font-size: clamp(3rem, 10vw, 5.5rem);
    font-weight: 800;
    letter-spacing: -3px;
    line-height: 0.95;
    color: var(--text-primary);
}

.status-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    background-color: var(--bg-card);
    border: 1px solid var(--border);
    padding: 0.5rem 1rem;
    border-radius: 100px;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    width: fit-content;
    box-shadow: var(--shadow);
    color: var(--text-primary);
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.status-dot {
    width: 8px;
    height: 8px;
    background-color: var(--dot-color);
    border-radius: 50%;
    display: inline-block;
    position: relative;
    flex-shrink: 0;
}

.status-dot::after {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    border-radius: 50%;
    background-color: inherit;
    animation: pulse 2s infinite ease-in-out;
}

@keyframes pulse {
    0% { transform: scale(1); opacity: 0.8; }
    100% { transform: scale(2.8); opacity: 0; }
}

.hero-desc {
    font-size: 1.2rem;
    line-height: 1.6;
    color: var(--text-secondary);
    max-width: 720px;
    font-weight: 400;
}

.hero-desc .highlight {
    color: var(--text-primary);
    font-weight: 500;
}

.btn-group {
    display: flex;
    gap: 0.75rem;
    margin-top: 0.5rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.7rem 1.5rem;
    font-size: 0.9rem;
    font-weight: 600;
    border-radius: 100px;
    transition: var(--transition);
    cursor: pointer;
}

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

.btn-primary:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}

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

.btn-secondary:hover {
    background-color: var(--bg-card);
    border-color: var(--border-hover);
    transform: translateY(-1px);
}

/* Tasks / Currently Working On Section */
.section-container {
    border-top: 1px solid var(--border);
    padding: 3.5rem 0;
}

.section-title-wrapper {
    margin-bottom: 2rem;
}

.section-title {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.5px;
    color: var(--text-primary);
}

.task-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    font-family: var(--font-mono);
}

.task-item {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    color: var(--text-secondary);
    font-size: 0.95rem;
    transition: var(--transition);
}

.task-item:hover {
    color: var(--text-primary);
}

.task-checkbox {
    width: 18px;
    height: 18px;
    border: 1px solid var(--border);
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 0.65rem;
    color: var(--text-primary);
    background-color: var(--bg-card);
    margin-top: 2px;
}

/* Featured Card Grid */
.featured-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    overflow: hidden;
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    transition: var(--transition);
    box-shadow: var(--shadow);
    margin-bottom: 2rem;
}

.featured-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-2px);
}

.card-content {
    padding: 2.5rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 1rem;
}

.card-tags {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.tag {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    padding: 0.2rem 0.5rem;
    border: 1px solid var(--border);
    border-radius: 100px;
    color: var(--text-secondary);
    background-color: var(--bg);
}

.card-title {
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: -0.5px;
    color: var(--text-primary);
    margin-top: 0.25rem;
}

.card-description {
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: 0.95rem;
}

.card-links {
    display: flex;
    gap: 1rem;
    margin-top: 0.5rem;
}

.card-link {
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.9rem;
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    border-bottom: 1px solid transparent;
    transition: var(--transition);
}

.card-link:hover {
    border-bottom-color: var(--text-primary);
}

.card-visual {
    background: radial-gradient(circle at center, var(--border) 0%, transparent 80%);
    display: flex;
    align-items: center;
    justify-content: center;
    border-left: 1px solid var(--border);
    position: relative;
    min-height: 250px;
    overflow: hidden;
    padding: 1.5rem;
}

/* Beautiful Custom CSS Mechanical Keyboard Mockup */
.keyboard-mockup {
    width: 100%;
    max-width: 280px;
    background: #141416;
    border: 4px solid #232326;
    border-radius: 10px;
    padding: 6px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.6);
}

.keyboard-row {
    display: flex;
    gap: 4px;
    width: 100%;
}

.key {
    background: #232326;
    border-radius: 3px;
    height: 18px;
    flex: 1;
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.05), 0 1px 2px rgba(0,0,0,0.4);
    transition: var(--transition);
}

.featured-card:hover .key {
    background: #2A2A2E;
}

.key.space {
    flex: 4;
    background: #2A2A2E;
}

.featured-card:hover .key.space {
    background: #323236;
}

.key.accent-key {
    background: var(--text-primary);
}

/* Projects Cards Grid */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 1.5rem;
}

.project-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 2.25rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    transition: var(--transition);
    box-shadow: var(--shadow);
}

.project-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-2px);
}

.project-card .card-title {
    font-size: 1.4rem;
}

/* Github Contribution Section */
.github-chart-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    box-shadow: var(--shadow);
}

.github-chart-title {
    align-self: flex-start;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.github-chart-link {
    width: 100%;
    display: flex;
    justify-content: center;
    overflow-x: auto;
}

.github-chart-link img {
    max-width: 100%;
    min-width: 600px;
    height: auto;
    filter: var(--chart-invert);
    border-radius: 8px;
    padding: 0.5rem;
    transition: var(--transition);
}

/* Global Footer */
.footer {
    border-top: 1px solid var(--border);
    padding: 4rem 0 2rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2rem;
}

.footer-nav {
    display: flex;
    gap: 1rem;
    font-size: 0.9rem;
    font-weight: 500;
}

.footer-info {
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-align: center;
}

.footer-brand {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

/* Social logos list */
.social-list {
    display: flex;
    gap: 1.25rem;
    justify-content: center;
    flex-wrap: wrap;
}

.social-icon {
    color: var(--text-secondary);
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.social-icon:hover {
    color: var(--text-primary);
    transform: translateY(-2px);
}

.social-icon svg {
    fill: currentColor;
    transition: fill 0.3s ease;
}

/* Animations for SVG logos & GitHub Icon */
.github-icon-nav {
    cursor: pointer;
    transition: var(--transition);
}

.github-icon-nav.hovered {
    animation: spin-in 0.5s forwards;
    color: var(--text-primary);
}

.github-icon-nav.unhovered {
    animation: spin-out 0.5s forwards;
    color: var(--text-secondary);
}

@keyframes spin-in {
    from { transform: rotate(0deg) scale(1); }
    to { transform: rotate(360deg) scale(1.1); }
}

@keyframes spin-out {
    from { transform: rotate(360deg) scale(1.1); }
    to { transform: rotate(0deg) scale(1); }
}

/* Responsive media queries */
@media (max-width: 768px) {
    .header-nav {
        flex-direction: column;
        gap: 1.5rem;
        padding: 1.5rem 0;
        margin-bottom: 2.5rem;
    }
    .nav-menu {
        flex-direction: column;
        width: 100%;
        gap: 1rem;
    }
    .nav-links {
        justify-content: center;
        flex-wrap: wrap;
    }
    .featured-card {
        grid-template-columns: 1fr;
    }
    .card-visual {
        border-left: none;
        border-top: 1px solid var(--border);
        min-height: 200px;
    }
    .projects-grid {
        grid-template-columns: 1fr;
    }
}