/* Base & Design Tokens */
:root {
    --bg-dark: #121212;
    --bg-card: #1e1e1e;
    --text-primary: #e0e0e0;
    --text-secondary: #aaaaaa;
    --accent-blue: #f35e16;
    --accent-glow: rgba(243, 94, 22, 0.15);
    --border-color: #2d2d2d;
    
    --font-sans: Verdana, Geneva, sans-serif;
    --font-heading: Verdana, Geneva, sans-serif;
}

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

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    font-family: var(--font-sans);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Header & Navigation */
header {
    border-bottom: 1px solid var(--border-color);
    backdrop-filter: blur(12px);
    background-color: rgba(18, 18, 18, 0.8);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 1.5rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo a {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--accent-blue);
    text-decoration: none;
    letter-spacing: -0.025em;
}

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

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: color 0.2s ease, transform 0.2s ease;
}

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

/* Main Content Wrapper */
main {
    flex: 1;
    max-width: 800px;
    width: 100%;
    margin: 0 auto;
    padding: 4rem 2rem;
}

/* Hero Section */
.hero {
    margin-bottom: 4rem;
}

.hero h1 {
    font-family: var(--font-heading);
    font-size: 2.75rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    letter-spacing: -0.05em;
}

.hero p {
    color: var(--text-secondary);
    font-size: 1.2rem;
    max-width: 600px;
}

/* Section Title */
.section-title {
    font-family: var(--font-heading);
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 2rem;
    letter-spacing: -0.03em;
}

/* Post Cards */
.post-list {
    display: grid;
    gap: 2rem;
}

.post-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    text-decoration: none;
    color: inherit;
    display: block;
    transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1), 
                border-color 0.2s ease,
                box-shadow 0.2s ease;
}

.post-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent-blue);
    box-shadow: 0 12px 20px -8px var(--accent-glow);
}

.post-meta {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    display: flex;
    gap: 1rem;
}

.post-card h3 {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    line-height: 1.3;
}

.post-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* Blog Post Detail */
.post-header {
    margin-bottom: 3rem;
}

.post-header h1 {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 800;
    line-height: 1.25;
    margin-bottom: 1rem;
    letter-spacing: -0.04em;
}

.post-content {
    font-size: 1.1rem;
    color: #e2e8f0;
}

.post-content p {
    margin-bottom: 1.75rem;
}

.post-content h2 {
    font-family: var(--font-heading);
    font-size: 1.75rem;
    font-weight: 700;
    margin-top: 3rem;
    margin-bottom: 1rem;
    letter-spacing: -0.03em;
}

.post-content h3 {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    font-weight: 600;
    margin-top: 2rem;
    margin-bottom: 0.75rem;
}

.post-content pre {
    background-color: #161616;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
    margin: 2rem 0;
    overflow-x: auto;
    font-size: 0.9rem;
}

.post-content code {
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

.post-content :not(pre) > code {
    background-color: #2d2d2d;
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    font-size: 0.9em;
}

.post-content ul, .post-content ol {
    margin-bottom: 1.75rem;
    padding-left: 1.5rem;
}

.post-content li {
    margin-bottom: 0.5rem;
}

.post-content a {
    color: var(--accent-blue);
    text-decoration: underline;
    text-underline-offset: 4px;
    transition: color 0.1s ease;
}

.post-content a:hover {
    color: #ff8a50;
}

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

/* Projects Grid and Filter Styles */
.project-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 2.5rem;
    justify-content: center;
}

.filter-btn {
    font-family: var(--font-sans);
    font-size: 0.85rem;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 0.5rem 1.2rem;
    border-radius: 20px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.filter-btn:hover {
    color: var(--text-primary);
    border-color: var(--accent-blue);
    background-color: rgba(243, 94, 22, 0.05);
}

.filter-btn.active {
    background-color: var(--accent-blue);
    border-color: var(--accent-blue);
    color: #000000;
    font-weight: 600;
    box-shadow: 0 4px 12px var(--accent-glow);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.project-card-container {
    animation: fadeInUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) both;
}

/* Staggered load animation */
.project-card-container:nth-child(1) { animation-delay: 0.05s; }
.project-card-container:nth-child(2) { animation-delay: 0.1s; }
.project-card-container:nth-child(3) { animation-delay: 0.15s; }
.project-card-container:nth-child(4) { animation-delay: 0.2s; }
.project-card-container:nth-child(5) { animation-delay: 0.25s; }
.project-card-container:nth-child(6) { animation-delay: 0.3s; }
.project-card-container:nth-child(7) { animation-delay: 0.35s; }
.project-card-container:nth-child(8) { animation-delay: 0.4s; }
.project-card-container:nth-child(9) { animation-delay: 0.45s; }

.project-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
    height: 100%;
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1),
                border-color 0.3s ease,
                box-shadow 0.3s ease;
    box-sizing: border-box;
}

.project-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent-blue);
    box-shadow: 0 12px 24px -10px var(--accent-glow);
}

.project-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
    font-size: 0.8rem;
}

.project-company {
    font-weight: 700;
    color: var(--accent-blue);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.project-time {
    color: var(--text-secondary);
}

.project-title {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    line-height: 1.3;
    color: var(--text-primary);
}

.project-summary {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.5;
    margin-bottom: 0;
}

/* Details section */
.project-details {
    margin-top: 1.25rem;
}

.project-highlights {
    margin: 0 0 1rem 0;
    padding-left: 1.2rem;
    font-size: 0.85rem;
    color: #e2e8f0;
}

.project-highlights li {
    margin-bottom: 0.4rem;
    line-height: 1.4;
}

.tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    margin-bottom: 1rem;
}

.tech-tag {
    font-size: 0.7rem;
    background-color: var(--bg-dark);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.2rem 0.5rem;
    border-radius: 5px;
    font-weight: 500;
}

.project-cta {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--accent-blue);
    display: flex;
    align-items: center;
    gap: 0.25rem;
    margin-top: auto;
    transition: color 0.2s ease;
}

.project-card:hover .project-cta {
    color: #ff8a50;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (max-width: 640px) {
    .hero h1 {
        font-size: 2.2rem;
    }
    
    .post-header h1 {
        font-size: 2rem;
    }
    
    main {
        padding: 2rem 1rem;
    }
    
    .nav-container {
        padding: 1rem 1rem;
    }
}