/* ── Theme Variables ───────────────────────────────────── */
:root {
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-code: #1e1e2e;
    --text-primary: #1a1a2e;
    --text-secondary: #4a4a6a;
    --text-muted: #6b7280;
    --accent: #2563eb;
    --accent-hover: #1d4ed8;
    --accent-light: #dbeafe;
    --border: #e5e7eb;
    --border-light: #f0f0f0;
    --card-bg: #ffffff;
    --card-shadow: 0 1px 3px rgba(0,0,0,0.08);
    --input-bg: #ffffff;
    --input-border: #d1d5db;
    --tag-bg: #dbeafe;
    --tag-border: #93c5fd;
    --tag-text: #1e40af;
    --code-inline-bg: #f1f5f9;
    --table-header-bg: #f8f9fa;
    --table-stripe-bg: #fafbfc;
    --btn-bg: transparent;
    --btn-text: var(--text-primary);
    --btn-border: var(--text-primary);
    --btn-hover-bg: var(--text-primary);
    --btn-hover-text: var(--bg-primary);
}

[data-theme="dark"] {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-code: #0d1117;
    --text-primary: #e2e8f0;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --accent: #3b82f6;
    --accent-hover: #60a5fa;
    --accent-light: #1e3a5f;
    --border: #334155;
    --border-light: #1e293b;
    --card-bg: #1e293b;
    --card-shadow: 0 1px 3px rgba(0,0,0,0.3);
    --input-bg: #1e293b;
    --input-border: #475569;
    --tag-bg: #1e3a5f;
    --tag-border: #2563eb;
    --tag-text: #93c5fd;
    --code-inline-bg: #1e293b;
    --table-header-bg: #1e293b;
    --table-stripe-bg: #162032;
    --btn-bg: transparent;
    --btn-text: var(--text-primary);
    --btn-border: var(--text-primary);
    --btn-hover-bg: var(--accent);
    --btn-hover-text: #ffffff;
}

/* ── Reset ────────────────────────────────────────────── */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

/* ── Base ─────────────────────────────────────────────── */
html {
    scroll-behavior: smooth;
}

body {
    font-family: 'DM Sans', system-ui, -apple-system, sans-serif;
    color: var(--text-primary);
    background: var(--bg-primary);
    line-height: 1.7;
    transition: background 0.2s ease, color 0.2s ease;
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: color 0.2s ease;
}

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

h1, h2, h3, h4 {
    line-height: 1.3;
    color: var(--text-primary);
}

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

/* ── Layout ───────────────────────────────────────────── */
.container-fluid {
    width: 100%;
    padding: 0 2rem;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* ── Nav ──────────────────────────────────────────────── */
nav {
    width: 100%;
    padding: 1.25rem 0;
    border-bottom: 1px solid var(--border);
    background: var(--bg-primary);
    position: sticky;
    top: 0;
    z-index: 100;
}

nav .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-brand {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

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

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

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

nav ul a {
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
    transition: color 0.2s ease;
}

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

.theme-toggle {
    background: none;
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 0.4rem 0.6rem;
    cursor: pointer;
    font-size: 1.1rem;
    line-height: 1;
    color: var(--text-secondary);
    transition: border-color 0.2s ease, color 0.2s ease;
}

.theme-toggle:hover {
    border-color: var(--accent);
    color: var(--accent);
}

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

/* ── About ────────────────────────────────────────────── */
.about {
    width: 100%;
    padding: 5rem 0;
    border-top: 1px solid var(--border);
}

.about h2 {
    text-align: center;
    margin-bottom: 2.5rem;
    font-size: 2rem;
}

.about-inner {
    display: flex;
    align-items: center;
    gap: 4rem;
}

.about-text {
    flex: 1;
    text-align: center;
}

.about-text h2 {
    font-size: 1.75rem;
    margin-bottom: 0.25rem;
}

.about-text h3 {
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--accent);
    margin-bottom: 1rem;
}

.about-text p {
    line-height: 1.8;
}

.about-socials {
    display: flex;
    justify-content: center;
    gap: 1.25rem;
    margin-top: 1.5rem;
}

.about-socials a {
    color: var(--text-muted);
    transition: color 0.2s ease;
}

.about-socials a:hover {
    color: var(--accent);
}

.about-image img {
    width: 300px;
    height: 300px;
    object-fit: cover;
    border-radius: 12px;
    box-shadow: var(--card-shadow);
}

@media (max-width: 768px) {
    .about-inner {
        flex-direction: column;
    }

    .about-image img {
        width: 100%;
        height: auto;
    }
}

/* ── Tech Stack ───────────────────────────────────────── */
.tech-stack {
    width: 100%;
    padding: 5rem 0;
    border-top: 1px solid var(--border);
}

.tech-stack h2 {
    text-align: center;
    margin-bottom: 2.5rem;
    font-size: 2rem;
}

.tech-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 2.5rem;
}

.tech-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    width: 100px;
}

.tech-item img {
    width: 56px;
    height: 56px;
    object-fit: contain;
    transition: transform 0.2s ease;
}

.tech-item:hover img {
    transform: scale(1.1);
}

.tech-item span {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-primary);
}

.logo-grpc {
    filter: none;
}

:root .logo-grpc {
    filter: brightness(0);
}

[data-theme="dark"] .logo-grpc {
    filter: none;
}

/* ── Blog ─────────────────────────────────────────────── */
.blog {
    width: 100%;
    padding: 5rem 0;
    border-top: 1px solid var(--border);
}

.blog h2 {
    margin-bottom: 2.5rem;
    text-align: center;
    font-size: 2rem;
}

.blog-post {
    display: flex;
    align-items: flex-start;
    gap: 2rem;
    padding: 2rem 0;
    border-top: 1px solid var(--border-light);
}

.blog-post img {
    width: 180px;
    height: 120px;
    object-fit: cover;
    border-radius: 8px;
    flex-shrink: 0;
}

.blog-post-content {
    flex: 1;
}

.blog-post-content h3 {
    margin-bottom: 0.5rem;
    font-size: 1.15rem;
}

.blog-post-content h3 a {
    color: var(--text-primary);
}

.blog-post-content h3 a:hover {
    color: var(--accent);
}

.blog-post-content p {
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
}

.blog-post-content a:last-child {
    margin-top: 0.5rem;
    display: inline-block;
    font-weight: 500;
    font-size: 0.9rem;
}

.blog-footer {
    text-align: center;
    padding-top: 2.5rem;
}

@media (max-width: 768px) {
    .blog-post {
        flex-direction: column;
    }

    .blog-post img {
        width: 100%;
        height: auto;
    }
}

/* ── Footer ───────────────────────────────────────────── */
footer {
    width: 100%;
    padding: 2.5rem 0;
    text-align: center;
    border-top: 1px solid var(--border);
    color: var(--text-muted);
    font-size: 0.9rem;
}

.footer-socials {
    display: flex;
    justify-content: center;
    gap: 1.25rem;
    margin-bottom: 1rem;
}

.footer-socials a {
    color: var(--text-muted);
    transition: color 0.2s ease;
}

.footer-socials a:hover {
    color: var(--accent);
}

/* ── Blog List ────────────────────────────────────────── */
.blog-list {
    width: 100%;
    padding: 4rem 0;
}

.blog-list h2 {
    text-align: center;
    margin-bottom: 2rem;
    font-size: 2rem;
}

.tag-filter {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2.5rem;
}

#tag-buttons {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.6rem;
}

.tag-btn {
    padding: 0.4rem 0.85rem;
    font-size: 0.85rem;
    font-family: 'DM Sans', sans-serif;
    font-weight: 500;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: var(--bg-secondary);
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.15s ease;
}

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

.tag-btn.active {
    background: var(--accent);
    border-color: var(--accent);
    color: #ffffff;
}

.clear-tags {
    padding: 0.4rem 0.85rem;
    font-size: 0.85rem;
    font-family: 'DM Sans', sans-serif;
    font-weight: 500;
    border: 1px solid #ef4444;
    border-radius: 999px;
    background: transparent;
    color: #ef4444;
    cursor: pointer;
    transition: all 0.15s ease;
}

.clear-tags:hover {
    background: #ef4444;
    color: #ffffff;
}

/* ── Single Post ──────────────────────────────────────── */
.single {
    width: 100%;
    padding: 4rem 0;
}

.single h1 {
    margin-bottom: 0.5rem;
    text-align: center;
    font-size: 2.25rem;
    letter-spacing: -0.02em;
}

.single > .container > p {
    text-align: center;
    color: var(--text-muted);
}

.single img {
    width: 400px;
    max-width: 100%;
    height: auto;
    border-radius: 10px;
    margin: 1.5rem auto;
    display: block;
}

.single-content {
    margin-top: 2rem;
    overflow-x: hidden;
}

.single-content h2 {
    margin-top: 3rem;
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.single-content h3 {
    margin-top: 2rem;
    margin-bottom: 0.75rem;
    font-size: 1.25rem;
}

.single-content p {
    margin-bottom: 1rem;
}

.single-content ul,
.single-content ol {
    margin-bottom: 1rem;
    padding-left: 1.5rem;
    color: var(--text-secondary);
}

.single-content li {
    margin-bottom: 0.35rem;
}

.single-content strong {
    color: var(--text-primary);
    font-weight: 600;
}

.single-content pre {
    overflow-x: auto;
    background: var(--bg-code);
    color: #d4d4d4;
    padding: 1.25rem;
    border-radius: 8px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
    line-height: 1.6;
    margin: 1.5rem 0;
    border: 1px solid var(--border);
}

.single-content code {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85em;
}

.single-content :not(pre) > code {
    background: var(--code-inline-bg);
    padding: 0.15rem 0.4rem;
    border-radius: 4px;
    font-size: 0.8em;
    color: var(--accent);
}

.single-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
    overflow-x: auto;
    display: block;
    font-size: 0.95rem;
}

.single-content th,
.single-content td {
    border: 1px solid var(--border);
    padding: 0.6rem 0.85rem;
    text-align: left;
}

.single-content th {
    background: var(--table-header-bg);
    font-weight: 600;
    color: var(--text-primary);
}

.single-content tr:nth-child(even) {
    background: var(--table-stripe-bg);
}

.single-content > p:first-child,
.single-content > p:nth-child(2) {
    text-align: center;
}

.single-content blockquote {
    border-left: 3px solid var(--accent);
    padding: 0.5rem 1rem;
    margin: 1.5rem 0;
    color: var(--text-muted);
    background: var(--bg-secondary);
    border-radius: 0 6px 6px 0;
}

/* ── Contact ──────────────────────────────────────────── */
.contact {
    width: 100%;
    padding: 5rem 0;
    border-top: 1px solid var(--border);
}

.contact h2 {
    text-align: center;
    margin-bottom: 2.5rem;
    font-size: 2rem;
}

.contact-form {
    max-width: 600px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--input-border);
    border-radius: 6px;
    font-size: 1rem;
    font-family: 'DM Sans', sans-serif;
    background: var(--input-bg);
    color: var(--text-primary);
    transition: border-color 0.2s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-light);
}

.form-footer {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.btn,
.form-footer button {
    padding: 0.75rem 2rem;
    font-size: 1rem;
    font-family: 'DM Sans', sans-serif;
    font-weight: 500;
    cursor: pointer;
    border: 2px solid var(--btn-border);
    border-radius: 6px;
    background: var(--btn-bg);
    color: var(--btn-text);
    text-decoration: none;
    display: inline-block;
    transition: all 0.2s ease;
}

.btn:hover,
.form-footer button:hover {
    background: var(--btn-hover-bg);
    color: var(--btn-hover-text);
    border-color: var(--btn-hover-bg);
}

.form-footer button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* ── Tags (inline on posts) ───────────────────────────── */
.blog-post-content a[href^="/tags/"] {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--tag-text);
    background: var(--tag-bg);
    padding: 0.15rem 0.5rem;
    border-radius: 999px;
    margin-right: 0.25rem;
}

.blog-post-content a[href^="/tags/"]:hover {
    background: var(--accent);
    color: white;
}

/* ── 404 ──────────────────────────────────────────────── */
.not-found {
    width: 100%;
    padding: 6rem 0;
}

.not-found-content {
    text-align: center;
    max-width: 500px;
    margin: 0 auto;
}

.not-found-content h1 {
    font-size: 8rem;
    font-weight: 700;
    letter-spacing: -0.04em;
    line-height: 1;
    color: var(--accent);
    margin-bottom: 2rem;
}

.not-found-terminal {
    background: var(--bg-code);
    color: #d4d4d4;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9rem;
    padding: 1.25rem 1.5rem;
    border-radius: 8px;
    text-align: left;
    margin-bottom: 2rem;
    border: 1px solid var(--border);
    line-height: 1.8;
}

.not-found-terminal .prompt {
    color: var(--accent);
    font-weight: 500;
}

.not-found-terminal .response {
    color: #ef4444;
}

.not-found-content p {
    margin-bottom: 2rem;
    font-size: 1.05rem;
}

/* ── Image Modal ──────────────────────────────────────── */
.post-image-wrapper {
    position: relative;
    display: block;
    cursor: pointer;
    margin: 1.5rem auto;
    width: fit-content;
}

.post-image-wrapper .post-image {
    display: block;
    transition: opacity 0.2s ease;
    margin: 0;
}

.post-image-wrapper:hover .post-image {
    opacity: 0.85;
}

.zoom-icon {
    position: absolute;
    bottom: 0.75rem;
    right: 0.75rem;
    background: rgba(0, 0, 0, 0.6);
    color: #ffffff;
    border-radius: 50%;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0.7;
    transition: opacity 0.2s ease;
}

.post-image-wrapper:hover .zoom-icon {
    opacity: 1;
}

.image-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    z-index: 1000;
    justify-content: center;
    align-items: center;
}

.image-modal img {
    width: 95vw;
    max-height: 95vh;
    object-fit: contain;
    border-radius: 8px;
}

.image-modal-close {
    position: fixed;
    top: 1.25rem;
    right: 1.5rem;
    background: none;
    border: none;
    color: #ffffff;
    font-size: 2.5rem;
    cursor: pointer;
    line-height: 1;
    z-index: 1001;
    transition: opacity 0.2s ease;
}

.image-modal-close:hover {
    opacity: 0.7;
}

/* ── Preloader ────────────────────────────────────────── */
.preloader {
    display: none;
}

/* ── Responsive ───────────────────────────────────────── */
@media (max-width: 768px) {
    nav .container {
        flex-direction: column;
        gap: 1rem;
    }

    .nav-right {
        gap: 1.5rem;
    }

    .about, .blog, .contact {
        padding: 3rem 0;
    }

    .single h1 {
        font-size: 1.75rem;
    }
}