/* Modern CSS with Dark Purple Theme */

:root {
    /* Dark mode colors (default) - Tokyo Night inspired */
    --primary-color: #BB9AF7;
    --primary-dark: #9D7CD8;
    --primary-light: #C0CAF5;
    --background: #1A1B26;
    --surface: #24283B;
    --surface-light: #292E42;
    --text-primary: #C0CAF5;
    --text-secondary: #9AA5CE;
    --accent: #F7768E;
    --border: #414868;
    --shadow: rgba(0, 0, 0, 0.5);

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;

    /* Typography */
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-mono: "SF Mono", Monaco, Consolas, "Liberation Mono", "Courier New", monospace;

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

/* Light mode colors */
[data-theme="light"] {
    --primary-color: #7C3AED;
    --primary-dark: #6B46C1;
    --primary-light: #8B5CF6;
    --background: #FFFFFF;
    --surface: #F9FAFB;
    --surface-light: #F3F4F6;
    --text-primary: #111827;
    --text-secondary: #6B7280;
    --accent: #9333EA;
    --border: #E5E7EB;
    --shadow: rgba(0, 0, 0, 0.1);
}

/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background-color: var(--background);
    color: var(--text-primary);
    line-height: 1.6;
    transition: var(--transition);
    overflow-x: hidden;
}

/* Theme Toggle */
.theme-toggle {
    position: fixed;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    z-index: 1001;
    background: var(--surface);
    border: 2px solid var(--border);
    border-radius: 50%;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 4px 12px var(--shadow);
}

.theme-toggle:hover {
    background: var(--surface-light);
    transform: scale(1.1);
}

.theme-toggle svg {
    width: 24px;
    height: 24px;
    color: var(--text-primary);
    transition: var(--transition);
}

.theme-toggle .sun-icon {
    display: none;
}

[data-theme="light"] .theme-toggle .sun-icon {
    display: block;
}

[data-theme="light"] .theme-toggle .moon-icon {
    display: none;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(var(--background-rgb, 15, 15, 21), 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
    transition: var(--transition);
}

[data-theme="light"] .navbar {
    background: rgba(255, 255, 255, 0.95);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-md) var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition);
}

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

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-2xl);
}

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

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width 0.3s ease;
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: transparent;
    border: none;
    cursor: pointer;
}

.nav-toggle span {
    width: 25px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition);
}

/* Main Content */
main {
    padding-top: 60px;
    background: var(--background);
}

.section {
    padding: var(--spacing-3xl) 0;
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    width: 100%;
}

/* Hero Section */
.hero {
    background: transparent;
    position: relative;
    overflow: hidden;
}

.hero-content {
    text-align: center;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: clamp(2.5rem, 8vw, 4rem);
    font-weight: 800;
    margin-bottom: var(--spacing-md);
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(1.2rem, 3vw, 1.5rem);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-2xl);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: var(--spacing-md) var(--spacing-2xl);
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: white;
    box-shadow: 0 4px 15px rgba(107, 70, 193, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(107, 70, 193, 0.4);
}

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

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

/* Section Titles */
.section-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    margin-bottom: var(--spacing-2xl);
    text-align: center;
    color: var(--primary-color);
}

/* About Section */
.about {
    background: transparent;
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-3xl);
    align-items: center;
    margin-bottom: var(--spacing-3xl);
}

.about-image img {
    width: 100%;
    max-width: 300px;
    border-radius: 16px;
    box-shadow: 0 10px 30px var(--shadow);
}

.about-content p {
    margin-bottom: var(--spacing-lg);
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.about-links {
    display: flex;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.social-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--surface-light);
    border-radius: 8px;
    color: var(--text-primary);
    text-decoration: none;
    transition: var(--transition);
}

.social-link:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

/* Projects */
.projects-section {
    margin-top: var(--spacing-3xl);
}

.projects-section h3 {
    font-size: 1.8rem;
    margin-bottom: var(--spacing-xl);
    color: var(--primary-light);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}

.project-card {
    background: rgba(36, 40, 59, 0.5);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: var(--spacing-xl);
    transition: var(--transition);
}

.project-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 30px var(--shadow);
    border-color: var(--primary-color);
}

.project-icon {
    width: 60px;
    height: 60px;
    object-fit: contain;
    margin-bottom: var(--spacing-md);
}

.project-card h4 {
    font-size: 1.4rem;
    margin-bottom: var(--spacing-sm);
    color: var(--primary-color);
}

.project-role {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.project-features {
    list-style: none;
    margin-bottom: var(--spacing-lg);
}

.project-features li {
    padding: var(--spacing-xs) 0;
    color: var(--text-secondary);
    position: relative;
    padding-left: var(--spacing-lg);
}

.project-features li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--primary-color);
}

/* Blog Section */
.blog {
    background: transparent;
}

.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: var(--spacing-xl);
}

.blog-post {
    background: rgba(36, 40, 59, 0.5);
    backdrop-filter: blur(10px);
    border-radius: 12px;
    padding: var(--spacing-xl);
    transition: var(--transition);
    cursor: pointer;
}

.blog-post:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 30px var(--shadow);
}

.blog-post h3 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.blog-post-date {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-md);
}

.blog-post-excerpt {
    color: var(--text-secondary);
    line-height: 1.6;
}

.blog-empty {
    text-align: center;
    padding: var(--spacing-3xl);
    color: var(--text-secondary);
}

/* Resume Section */
.resume {
    background: transparent;
}

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

.resume-content p {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-2xl);
}

/* Contact Section */
.contact {
    background: transparent;
}

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

.contact-content p {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-2xl);
}

/* Footer */
.footer {
    background: var(--surface);
    padding: var(--spacing-xl) 0;
    text-align: center;
    border-top: 1px solid var(--border);
}

.footer p {
    color: var(--text-secondary);
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 60px;
        flex-direction: column;
        background: var(--surface);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px var(--shadow);
        padding: var(--spacing-xl) 0;
    }

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

    .nav-toggle {
        display: flex;
    }

    .about-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .about-image {
        display: flex;
        justify-content: center;
    }

    .about-links {
        justify-content: center;
    }

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

    .blog-grid {
        grid-template-columns: 1fr;
    }

    .theme-toggle {
        top: auto;
        bottom: var(--spacing-lg);
    }
}