/* style.css */

/* --- CSS Variables & Theming --- */
:root {
    /* Light Mode (Default) - Clean, corporate, SaaS-like */
    --bg-color: #ffffff;
    --bg-alt: #f8fafc;
    --text-main: #0f172a;
    --text-muted: #475569;
    --border-color: #e2e8f0;
    --accent-color: #0f172a;
    --accent-hover: #334155;
    --btn-text: #ffffff;
    --nav-bg: rgba(255, 255, 255, 0.85);
    
    --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
    --transition: 0.3s ease;
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
}

@media (prefers-color-scheme: dark) {
    :root {
        /* Dark Mode - Sleek, professional slate */
        --bg-color: #0f172a;
        --bg-alt: #1e293b;
        --text-main: #f8fafc;
        --text-muted: #94a3b8;
        --border-color: #334155;
        --accent-color: #f8fafc;
        --accent-hover: #cbd5e1;
        --btn-text: #0f172a;
        --nav-bg: rgba(15, 23, 42, 0.85);
    }
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.6;
    transition: background-color var(--transition), color var(--transition);
}

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

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* --- Layout & Utilities --- */
.container {
    width: 100%;
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 2rem;
}

.section {
    padding: 6rem 0;
}

.section-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 3rem;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 40px;
    height: 3px;
    background-color: var(--accent-color);
    border-radius: var(--radius-sm);
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-muted);
    margin-bottom: 3rem;
    margin-top: -1.5rem;
}

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

/* --- Buttons --- */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    transition: all var(--transition);
    cursor: pointer;
    text-align: center;
}

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

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

.btn-outline {
    background-color: transparent;
    color: var(--text-main);
    border: 2px solid var(--border-color);
}

.btn-outline:hover {
    border-color: var(--accent-color);
}

/* --- Navigation --- */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background-color: var(--nav-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
    transition: background-color var(--transition), border-color var(--transition);
}

.nav-container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

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

.nav-links a:hover,
.nav-links a.active {
    color: var(--text-main);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
}

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--text-main);
    margin-bottom: 5px;
    border-radius: var(--radius-sm);
    transition: all var(--transition);
}

/* --- Hero Section --- */
.hero-section {
    padding: 12rem 0 8rem;
    min-height: 90vh;
    display: flex;
    align-items: center;
}

.hero-content {
    max-width: 700px;
}

.greeting {
    color: var(--text-muted);
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.name {
    font-size: clamp(3rem, 6vw, 4.5rem);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -1.5px;
    margin-bottom: 0.5rem;
}

.title {
    font-size: clamp(1.5rem, 3vw, 2.5rem);
    font-weight: 600;
    color: var(--text-muted);
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.hero-bio {
    font-size: 1.15rem;
    color: var(--text-muted);
    margin-bottom: 2.5rem;
    max-width: 550px;
}

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

/* --- About Section --- */
.about-content {
    display: grid;
    grid-template-columns: 3fr 2fr;
    gap: 4rem;
    align-items: center;
}

.about-text p {
    margin-bottom: 1.5rem;
    font-size: 1.05rem;
    color: var(--text-muted);
}

.about-text strong {
    color: var(--text-main);
    font-weight: 600;
}

.about-image-container {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background-color: var(--bg-alt);
    border: 1px solid var(--border-color);
}

.about-image {
    width: 100%;
    filter: grayscale(20%);
    transition: filter var(--transition);
}

.about-image:hover {
    filter: grayscale(0%);
}

/* --- Resume & Skills Section --- */
.resume-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.column-title {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    font-weight: 600;
}

.resume-item {
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--border-color);
}

.resume-item:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.resume-item-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 0.5rem;
}

.resume-item-header h4 {
    font-size: 1.1rem;
    font-weight: 600;
}

.date {
    font-size: 0.9rem;
    color: var(--text-muted);
    font-family: monospace;
}

.institution {
    font-weight: 500;
    margin-bottom: 0.75rem;
    color: var(--text-main);
}

.description {
    color: var(--text-muted);
    font-size: 0.95rem;
}

.resume-actions {
    margin-top: 1.5rem;
}

.skills-category {
    margin-bottom: 2rem;
}

.skills-category h4 {
    font-size: 1.05rem;
    margin-bottom: 1rem;
    color: var(--text-main);
}

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

.skills-tags span {
    padding: 0.4rem 0.8rem;
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-muted);
    transition: all var(--transition);
}

.skills-tags span:hover {
    border-color: var(--accent-color);
    color: var(--text-main);
}

/* --- Projects Section --- */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

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

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px -15px rgba(0, 0, 0, 0.1);
}

@media (prefers-color-scheme: dark) {
    .project-card:hover {
        box-shadow: 0 10px 30px -15px rgba(0, 0, 0, 0.5);
    }
}

.project-title {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    font-weight: 600;
}

.project-description {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.project-tech span {
    font-size: 0.8rem;
    font-family: monospace;
    color: var(--text-muted);
}

.project-links {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.project-link {
    font-size: 0.9rem;
    font-weight: 500;
    text-decoration: underline;
    text-underline-offset: 4px;
}

.project-link:hover {
    color: var(--text-muted);
}

.project-status {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-muted);
    padding: 0.2rem 0.6rem;
    background-color: var(--bg-alt);
    border-radius: var(--radius-sm);
}

/* --- Blog Section --- */
.blog-empty-state {
    text-align: center;
    padding: 4rem 2rem;
    background-color: var(--bg-color);
    border: 1px dashed var(--border-color);
    border-radius: var(--radius-lg);
}

.empty-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.blog-empty-state h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.blog-empty-state p {
    color: var(--text-muted);
    max-width: 400px;
    margin: 0 auto;
}

/* --- Contact Section --- */
.contact-content {
    max-width: 600px;
}

.contact-text {
    font-size: 1.1rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
}

.contact-btn {
    padding: 1rem 2rem;
    font-size: 1.05rem;
}

/* --- Footer --- */
.site-footer {
    padding: 2rem 0;
    text-align: center;
    border-top: 1px solid var(--border-color);
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.social-links a {
    color: var(--text-muted);
    transition: color var(--transition);
}

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

.copyright {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* --- Responsive Design --- */
@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--nav-bg);
        backdrop-filter: blur(10px);
        -webkit-backdrop-filter: blur(10px);
        flex-direction: column;
        padding: 2rem;
        gap: 1.5rem;
        border-bottom: 1px solid var(--border-color);
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .mobile-menu-btn {
        display: block;
    }

    .hero-section {
        padding: 8rem 0 4rem;
        min-height: 80vh;
    }

    .about-content,
    .resume-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }

    .about-image-container {
        max-width: 400px;
        margin: 0 auto;
    }
}