/* Overall page */
body {
    margin: 0;
    padding: 40px 24px;
    background: #0f172a;
    color: #e2e8f0;
    font-family: system-ui, sans-serif;
    line-height: 1.7;
}

main {
    max-width: 850px;
    margin: 0 auto;
}

a {
    color: #7dd3fc;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

/* Markdown content */
.markdown-body h1,
.markdown-body h2,
.markdown-body h3 {
    color: #f8fafc;
    line-height: 1.3;
    margin-top: 1.8em;
}

.markdown-body h1 {
    font-size: 2.2rem;
}

.markdown-body h2 {
    font-size: 1.6rem;
    border-bottom: 1px solid #334155;
    padding-bottom: 8px;
}

.markdown-body p {
    margin: 1em 0;
}

.markdown-body ul,
.markdown-body ol {
    padding-left: 2rem;
}

.markdown-body li {
    margin: 4px 0;
}

/* Inline code */
.markdown-body :not(pre) > code {
    background: #1e293b;
    color: #fda4af;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.9em;
}

/* Fenced code blocks */
.markdown-body pre {
    background: #020617;
    border: 1px solid #334155;
    border-radius: 10px;
    padding: 18px;
    overflow-x: auto;
    margin: 24px 0;
}

.markdown-body pre code {
    background: transparent;
    color: #e2e8f0;
    font-family: "DejaVu Sans Mono", monospace;
    font-size: 0.9rem;
    line-height: 1.6;
    white-space: pre;
}

/* Blockquotes */
.markdown-body blockquote {
    margin: 24px 0;
    padding: 8px 20px;
    border-left: 4px solid #38bdf8;
    background: #1e293b;
    color: #cbd5e1;
    border-radius: 0 8px 8px 0;
}


/* Copy button for Markdown code blocks */

.markdown-body pre {
    position: relative;
    padding-top: 52px;
}

.markdown-body .copy-button {
    position: absolute;
    top: 10px;
    right: 10px;

    padding: 5px 12px;
    border: 1px solid #475569;
    border-radius: 6px;

    background: #1e293b;
    color: #e2e8f0;

    font-size: 0.8rem;
    font-family: inherit;
    cursor: pointer;
}

.markdown-body .copy-button:hover {
    background: #334155;
}

.markdown-body .copy-button:focus-visible {
    outline: 2px solid #38bdf8;
    outline-offset: 2px;
}
/* Blog layout */

.blog-layout {
    display: grid;
    grid-template-columns: 240px minmax(0, 1fr);
    gap: 40px;
    max-width: 1200px;
    margin: 0 auto;
}

.blog-layout main {
    width: 100%;
    min-width: 0;
}

/* Sidebar */

.sidebar {
    border-right: 1px solid #334155;
    padding-right: 24px;
}

.sidebar h2 {
    font-size: 1.1rem;
    color: #f8fafc;
}

.sidebar ul {
    list-style: none;
    padding: 0;
}

.sidebar li {
    margin: 12px 0;
}

.sidebar a {
    color: #94a3b8;
}

.sidebar a:hover {
    color: #38bdf8;
}

/* Mobile layout */

@media (max-width: 700px) {
    .blog-layout {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .sidebar {
        border-right: 0;
        border-bottom: 1px solid #334155;
        padding-right: 0;
        padding-bottom: 16px;
    }
}

/* Homepage */

.home-page {
    max-width: 800px;
    margin: 0 auto;
    padding: 64px 24px;
}

.home-header {
    margin-bottom: 64px;
}

.home-header h1 {
    font-size: 3rem;
    margin-bottom: 12px;
}

.home-header p {
    color: #94a3b8;
    font-size: 1.1rem;
    line-height: 1.7;
}

.post-list h2 {
    margin-bottom: 24px;
}

.post-card {
    padding: 24px 0;
    border-bottom: 1px solid #334155;
}

.post-card h3 {
    margin: 0 0 12px;
    font-size: 1.4rem;
}

.post-card h3 a {
    color: #e2e8f0;
    text-decoration: none;
}

.post-card h3 a:hover,
.read-more:hover {
    color: #38bdf8;
}

.read-more {
    color: #94a3b8;
    font-size: 0.9rem;
    text-decoration: none;
}
/* Global navbar */

.site-header {
    width: 100%;
    border-bottom: 1px solid #334155;
    background: #0f172a;
}

.navbar {
    max-width: 1200px;
    margin: 0 auto;
    padding: 18px 24px;

    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.navbar-brand {
    color: #f8fafc;
    font-size: 1.3rem;
    font-weight: 700;
    text-decoration: none;
}

.navbar-links {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 24px;
}

.navbar-links a {
    color: #94a3b8;
    font-size: 0.95rem;
    text-decoration: none;
    transition: color 0.2s;
}

.navbar-links a:hover,
.navbar-brand:hover {
    color: #38bdf8;
}



/* Mobile navbar */

@media (max-width: 600px) {
    .navbar {
        flex-direction: column;
        align-items: flex-start;
    }

    .navbar-links {
        gap: 16px;
    }
}
/* Global watermark */

.site-watermark {
    position: fixed;
    bottom: 16px;
    right: 20px;

    top: auto;
    transform: none;
    writing-mode: horizontal-tb;

    color: #94a3b8;
    opacity: 0.35;

    font-size: 0.75rem;
    font-family: monospace;
    letter-spacing: 0.08em;

    pointer-events: none;
    user-select: none;
    z-index: 10;
}
@media (max-width: 600px) {
    .site-watermark {
        right: 10px;
        bottom: 10px;
        font-size: 0.65rem;
    }
}

/* Admin Dashboard */

.admin-dashboard {
    width: min(100%, 1000px);
    margin: 0 auto;
    padding: 48px 24px 80px;
    color: #e2e8f0;
}

.admin-dashboard > h1 {
    margin: 0 0 12px;
    font-size: clamp(2rem, 4vw, 2.75rem);
    color: #f8fafc;
}

.admin-dashboard > p {
    margin-bottom: 32px;
    color: #94a3b8;
}

.admin-dashboard > section {
    margin-bottom: 28px;
    padding: 28px;
    border: 1px solid #334155;
    border-radius: 16px;
    background: #1e293b;
}

.admin-dashboard > section[hidden] {
    display: none;
}

.admin-dashboard h2 {
    margin: 0 0 20px;
    color: #f8fafc;
    font-size: 1.4rem;
}

.admin-dashboard [role="status"] {
    color: #94a3b8;
    line-height: 1.6;
}

/* Post management list */

#admin-posts-list ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: 14px;
}

#admin-posts-list li {
    padding: 20px;
    border: 1px solid #334155;
    border-radius: 12px;
    background: #0f172a;
}

#admin-posts-list li strong {
    display: block;
    margin-bottom: 8px;
    color: #f8fafc;
    font-size: 1.1rem;
    overflow-wrap: anywhere;
}

#admin-posts-list li p {
    margin: 0 0 16px;
    color: #94a3b8;
    font-size: 0.9rem;
    overflow-wrap: anywhere;
}

/* Create and edit forms */

.admin-dashboard form {
    display: grid;
    gap: 18px;
}

.admin-dashboard form > div {
    display: grid;
    gap: 8px;
}

.admin-dashboard label {
    color: #cbd5e1;
    font-size: 0.95rem;
    font-weight: 600;
}

.admin-dashboard input:not([type="hidden"]),
.admin-dashboard textarea {
    box-sizing: border-box;
    width: 100%;
    min-width: 0;
    padding: 12px 14px;
    border: 1px solid #475569;
    border-radius: 9px;
    background: #0f172a;
    color: #f8fafc;
    font: inherit;
    line-height: 1.5;
}

.admin-dashboard textarea {
    resize: vertical;
}

.admin-dashboard input:focus-visible,
.admin-dashboard textarea:focus-visible {
    outline: 2px solid #38bdf8;
    outline-offset: 2px;
    border-color: #38bdf8;
}

/* Dashboard buttons */

.admin-dashboard button {
    padding: 10px 16px;
    border: 1px solid #475569;
    border-radius: 9px;
    background: #334155;
    color: #f8fafc;
    font: inherit;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s, border-color 0.2s;
}

.admin-dashboard button:hover:not(:disabled) {
    background: #475569;
}

.admin-dashboard button:focus-visible {
    outline: 2px solid #38bdf8;
    outline-offset: 3px;
}

.admin-dashboard button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Primary actions: Save Draft and Save Changes */

.admin-dashboard form button[type="submit"] {
    background: #0369a1;
    border-color: #0284c7;
    color: #fff;
}

.admin-dashboard form button[type="submit"]:hover:not(:disabled) {
    background: #0284c7;
}

/* Post actions: Edit, Publish, Delete */

#admin-posts-list li button {
    margin: 0 8px 8px 0;
}

#admin-posts-list li button:nth-of-type(2) {
    background: #166534;
    border-color: #15803d;
}

#admin-posts-list li button:nth-of-type(2):hover:not(:disabled) {
    background: #15803d;
}

/* Delete is always the last button in each post row. */

#admin-posts-list li button:last-of-type:not(:first-of-type) {
    border-color: #b91c1c;
    background: #7f1d1d;
}

#admin-posts-list li button:last-of-type:not(:first-of-type):hover:not(:disabled) {
    background: #991b1b;
}

/* Mobile layout */

@media (max-width: 600px) {
    .admin-dashboard {
        padding: 28px 16px 64px;
    }

    .admin-dashboard > section {
        padding: 18px;
        border-radius: 12px;
    }

    #admin-posts-list li {
        padding: 16px;
    }

    #admin-posts-list li button {
        margin-bottom: 10px;
    }
}

/* Admin Login */

.admin-login-page {
    width: min(100% - 32px, 440px);
    margin: 72px auto 100px;
    padding: 36px;
    box-sizing: border-box;
    border: 1px solid #334155;
    border-radius: 16px;
    background: #1e293b;
    color: #e2e8f0;
    box-shadow: 0 16px 48px rgb(0 0 0 / 15%);
}

.admin-login-page h1 {
    margin: 0 0 28px;
    color: #f8fafc;
    font-size: 2rem;
    text-align: center;
}

#admin-login-form {
    display: grid;
    gap: 20px;
}

#admin-login-form > div {
    display: grid;
    gap: 8px;
}

#admin-login-form label {
    color: #cbd5e1;
    font-size: 0.95rem;
    font-weight: 600;
}

#admin-login-form input {
    box-sizing: border-box;
    width: 100%;
    min-width: 0;
    padding: 12px 14px;
    border: 1px solid #475569;
    border-radius: 9px;
    background: #0f172a;
    color: #f8fafc;
    font: inherit;
}

#admin-login-form input:focus-visible {
    outline: 2px solid #38bdf8;
    outline-offset: 2px;
    border-color: #38bdf8;
}

#admin-login-button {
    width: 100%;
    padding: 13px 18px;
    border: 1px solid #0284c7;
    border-radius: 9px;
    background: #0369a1;
    color: #fff;
    font: inherit;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
}

#admin-login-button:hover:not(:disabled) {
    background: #0284c7;
}

#admin-login-button:focus-visible {
    outline: 2px solid #38bdf8;
    outline-offset: 3px;
}

#admin-login-button:disabled {
    opacity: 0.55;
    cursor: not-allowed;
}

#admin-login-message {
    margin: 0;
    min-height: 1.5em;
    color: #94a3b8;
    font-size: 0.9rem;
    line-height: 1.5;
    text-align: center;
}

@media (max-width: 600px) {
    .admin-login-page {
        margin: 36px auto 64px;
        padding: 24px 20px;
        border-radius: 12px;
    }

    .admin-login-page h1 {
        font-size: 1.7rem;
    }
}

/* =========================================================
   BLOG DESIGN REFINEMENT — calm navy + accessible cyan
   Append-only overrides: preserves existing HTML selectors.
   ========================================================= */
:root {
  color-scheme: dark;
  --page: #0b1220;
  --surface: #121e30;
  --surface-raised: #19283c;
  --line: #304158;
  --text: #e8eef6;
  --muted: #b2c1d3;
  --heading: #f7faff;
  --accent: #80d8f7;
  --accent-strong: #38bdf8;
  --radius: 14px;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  background: var(--page);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.8;
  padding: 0;
  -webkit-font-smoothing: antialiased;
}
::selection { background: #164e63; color: #fff; }
a { color: var(--accent); text-underline-offset: 3px; }
a:hover { color: #b9edff; }
:focus-visible { outline: 2px solid var(--accent-strong); outline-offset: 3px; }
.site-header { background: #0e1929; border-bottom: 1px solid var(--line); }
.navbar { min-height: 76px; padding: 16px 28px; }
.navbar-brand { font-size: 1.35rem; letter-spacing: -.035em; color: var(--heading); }
.navbar-links { gap: 12px; }
.navbar-links a { color: var(--muted); padding: 8px 12px; border-radius: 9px; font-weight: 500; }
.navbar-links a:hover, .navbar-links a[aria-current="page"] { color: var(--heading); background: var(--surface-raised); text-decoration: none; }
.blog-layout { max-width: 1200px; gap: clamp(24px, 4vw, 56px); padding: 48px 28px 88px; }
.blog-layout main { max-width: 800px; }
.sidebar { border-right: 1px solid var(--line); padding-right: 24px; }
.sidebar h2 { color: var(--heading); font-size: .95rem; letter-spacing: .04em; text-transform: uppercase; }
.sidebar li { margin: 5px 0; }
.sidebar a { display: block; color: var(--muted); padding: 9px 12px; border-radius: 9px; line-height: 1.5; }
.sidebar a:hover, .sidebar a[aria-current="page"] { color: var(--accent); background: var(--surface); text-decoration: none; }
.markdown-body { font-size: 1.0625rem; line-height: 1.85; overflow-wrap: break-word; }
.markdown-body > :first-child { margin-top: 0; }
.markdown-body h1, .markdown-body h2, .markdown-body h3,
.markdown-body h4 { color: var(--heading); letter-spacing: -.025em; line-height: 1.35; }
.markdown-body h1 { font-size: clamp(2rem, 4vw, 2.65rem); margin: 0 0 1.1rem; }
.markdown-body h2 { font-size: clamp(1.45rem, 2.6vw, 1.85rem); border-bottom: 1px solid var(--line); padding-bottom: 12px; margin-top: 2.2em; }
.markdown-body h3 { font-size: 1.3rem; margin-top: 1.8em; }
.markdown-body p { margin: 1.15em 0; }
.markdown-body strong { color: var(--heading); }
.markdown-body ul, .markdown-body ol { padding-left: 1.65rem; }
.markdown-body li { margin: .45em 0; padding-left: .15rem; }
.markdown-body li::marker { color: var(--accent); }
.markdown-body :not(pre) > code { background: #233247; color: #ffb9c6; padding: .18em .42em; border: 1px solid #34465e; border-radius: 6px; font-size: .87em; overflow-wrap: anywhere; }
.markdown-body pre { background: #080f1c; border: 1px solid #34465e; border-radius: var(--radius); padding: 54px 20px 20px; margin: 28px 0; box-shadow: 0 12px 32px #0002; }
.markdown-body pre code { font-size: .91rem; line-height: 1.7; color: #e6edf6; }
.markdown-body .copy-button { top: 12px; right: 12px; background: #223248; color: var(--heading); border: 1px solid #42536a; border-radius: 8px; padding: 6px 12px; }
.markdown-body .copy-button:hover { background: #30465f; }
.markdown-body blockquote { background: #152a3a; border-left: 4px solid var(--accent-strong); border-radius: 0 12px 12px 0; color: #d4e4f1; padding: 12px 22px; }
.markdown-body img { display: block; max-width: 100%; height: auto; border-radius: 12px; margin: 28px auto; }
.markdown-body table { display: block; width: 100%; overflow-x: auto; border-collapse: collapse; margin: 24px 0; font-size: .94rem; }
.markdown-body th, .markdown-body td { padding: 12px 16px; border: 1px solid var(--line); text-align: left; }
.markdown-body th { background: var(--surface-raised); color: var(--heading); }
.markdown-body tr:nth-child(even) { background: #121e30; }
.markdown-body hr { border: 0; border-top: 1px solid var(--line); margin: 40px 0; }
.home-page { max-width: 900px; padding: 70px 28px 100px; }
.home-header { margin-bottom: 52px; }
.home-header h1 { color: var(--heading); font-size: clamp(2.35rem, 5vw, 3.6rem); line-height: 1.2; letter-spacing: -.045em; }
.home-header p { color: var(--muted); max-width: 640px; font-size: 1.1rem; }
.post-list h2 { color: var(--heading); font-size: 1.4rem; }
.post-card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px 26px; margin: 14px 0; transition: border-color .2s, background .2s, transform .2s; }
.post-card:hover { background: var(--surface-raised); border-color: #53728f; transform: translateY(-2px); }
.post-card h3 { font-size: 1.35rem; line-height: 1.4; margin-bottom: 8px; }
.post-card h3 a { color: var(--heading); }
.post-card p { color: var(--muted); }
.read-more { color: var(--accent); font-weight: 600; }
.site-watermark { opacity: .45; color: var(--muted); }
.admin-dashboard { color: var(--text); }
.admin-dashboard > h1, .admin-dashboard h2, .admin-login-page h1 { color: var(--heading); }
.admin-dashboard > p, .admin-dashboard [role="status"], #admin-posts-list li p { color: var(--muted); }
.admin-dashboard > section, .admin-login-page { background: var(--surface); border-color: var(--line); box-shadow: 0 12px 32px #0002; }
#admin-posts-list li { background: var(--page); border-color: var(--line); }
.admin-dashboard label, #admin-login-form label { color: var(--text); }
.admin-dashboard input:not([type="hidden"]), .admin-dashboard textarea, #admin-login-form input { background: var(--page); border-color: #53667f; color: var(--heading); }
.admin-dashboard input::placeholder, .admin-dashboard textarea::placeholder, #admin-login-form input::placeholder { color: #9bacc0; }
.admin-dashboard button, #admin-login-button { min-height: 42px; }
.admin-dashboard form button[type="submit"], #admin-login-button { background: #075e8e; border-color: #1883b8; }
.admin-dashboard form button[type="submit"]:hover:not(:disabled), #admin-login-button:hover:not(:disabled) { background: #0878af; }
@media (max-width: 700px) {
  .blog-layout { grid-template-columns: minmax(0, 1fr); gap: 28px; padding: 28px 18px 64px; }
  .sidebar { border-right: 0; border-bottom: 1px solid var(--line); padding: 0 0 16px; }
  .sidebar ul { display: flex; flex-wrap: wrap; gap: 4px 8px; }
  .sidebar li { margin: 0; }
  .home-page { padding: 44px 18px 70px; }
  .post-card { padding: 20px; }
  .markdown-body { font-size: 1rem; line-height: 1.8; }
  .markdown-body pre { margin-left: -4px; margin-right: -4px; padding-left: 14px; padding-right: 14px; }
}
@media (max-width: 600px) {
  .navbar { padding: 16px 18px; gap: 12px; }
  .navbar-links { gap: 4px; }
  .navbar-links a { padding: 7px 10px; }
  .admin-dashboard { padding: 28px 16px 64px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; }
}