:root {
    /* light theme */
    --bg: #f7f8fb;
    /* page background (light) */
    --card: #ffffff;
    /* card / header bg */
    --text: #0f1724;
    /* main text */
    --muted: #55616a;
    /* muted text */
    --accent: #0b74d1;
    /* primary accent */
    --glass: rgba(255, 255, 255, 0.6);
    --radius: 12px;

    /* code block background for light theme (dark-ish) */
    --code-bg: #0b1220;
    --ghost-border: rgba(0, 0, 0, 0.06);
    --icon-hover: rgba(0, 0, 0, 0.04);
}

[data-theme="dark"] {
    /* dark theme (solid navy). change to a dark grey if you prefer (e.g. #0f1724) */
    --bg: #000814;
    /* solid navy background */
    --card: #000d1a;
    /* card slightly lighter than bg */
    --text: #e6eef6;
    --muted: #9fb2c8;
    --accent: #3aa0ff;
    --glass: rgba(255, 255, 255, 0.03);

    /* code block background in dark mode */
    --code-bg: #06101a;
    --ghost-border: rgba(255, 255, 255, 0.06);
    --icon-hover: rgba(255, 255, 255, 0.02);
}

/* base */
* {
    box-sizing: border-box;
}

html,
body {
    height: 100%;
}

body {
    margin: 0;
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
    /* solid background color (no gradient) */
    background: var(--bg);
    color: var(--text);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    line-height: 1.45;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px;
}

/* header */
.site-header {
    background: var(--card);
    box-shadow: 0 6px 20px rgba(3, 10, 18, 0.06);
    position: sticky;
    top: 0;
    z-index: 30;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 24px;
}

.brand h1 {
    margin: 0;
    font-size: 1.1rem;
}

.brand .tagline {
    margin: 4px 0 0;
    color: var(--muted);
    font-size: .95rem;
}

/* bigger, more noticeable name */
.name {
    font-size: 1.8rem;
    font-weight: 700;
    letter-spacing: 0.3px;
    margin: 0;
    line-height: 1;
}

.brand .tagline {
    margin-top: 6px;
}

/* icon link styles */
.header-actions {
    display: flex;
    align-items: center;
    gap: 10px;
}

.icon-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    border-radius: 8px;
    text-decoration: none;
    color: var(--text);
    /* ensure SVGs using currentColor follow theme */
    background: transparent;
    border: 1px solid transparent;
}

.icon-link:hover {
    background: var(--icon-hover);
}

/* use block-level svg scaling */
.icon-link svg {
    display: block;
    width: 20px;
    height: 20px;
}

/* theme button (text) */
.theme-btn {
    background: transparent;
    border: 1px solid var(--ghost-border);
    padding: 8px 12px;
    border-radius: 10px;
    cursor: pointer;
    font-weight: 600;
    color: var(--text);
}

.theme-btn:hover {
    filter: brightness(0.98);
}

/* buttons */
.btn {
    background: var(--accent);
    color: white;
    padding: 8px 12px;
    border-radius: 10px;
    text-decoration: none;
    display: inline-block;
}

.btn.ghost {
    background: transparent;
    border: 1px solid var(--ghost-border);
    color: var(--text);
}

/* larger, prominent GitHub button used on project header */
.open-github-btn {
    padding: 10px 14px;
    font-weight: 700;
    border-radius: 10px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    color: white;
    background: var(--accent);
    /* primary color; follows theme variable */
    border: 1px solid rgba(0, 0, 0, 0.04);
    box-shadow: 0 4px 10px rgba(2, 14, 28, 0.06);
}

/* hover / focus */
.open-github-btn:hover,
.open-github-btn:focus {
    transform: translateY(-1px);
    box-shadow: 0 6px 14px rgba(2, 14, 28, 0.09);
    text-decoration: none;
}

/* if you prefer a ghost (outline) variant that still looks big, uncomment and use:
.open-github-btn.ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--ghost-border);
  box-shadow: none;
}
*/

/* responsive tweak: slightly smaller on narrow screens */
@media (max-width: 520px) {
    .open-github-btn {
        padding: 8px 10px;
        font-size: 0.95rem;
    }
}


.icon-btn {
    background: transparent;
    border: none;
    font-size: 1.05rem;
    cursor: pointer;
    padding: 8px 10px;
    border-radius: 8px;
}

/* hero */
.hero {
    display: flex;
    flex-direction: column;
    gap: 16px;
    padding: 28px 0;
}

.hero h2 {
    margin: 0;
    font-size: 1.4rem;
}

.lead {
    color: var(--muted);
}

.skills {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 8px;
}

.badge {
    background: var(--glass);
    padding: 6px 10px;
    border-radius: 999px;
    font-weight: 600;
    color: var(--muted);
    font-size: .85rem;
}

/* projects grid */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 18px;
    margin-top: 12px;
}

.card {
    background: var(--card);
    border-radius: 12px;
    padding: 14px;
    box-shadow: 0 6px 18px rgba(2, 14, 28, 0.06);
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.card .thumb {
    height: 140px;
    border-radius: 10px;
    background: #dfe9f8;
    background-size: cover;
    background-position: center;
}

.card h4 {
    margin: 0;
}

.meta {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.tech {
    font-size: .82rem;
    padding: 6px 8px;
    border-radius: 8px;
    background: var(--glass);
    color: var(--muted);
}

.card .row {
    display: flex;
    gap: 8px;
    align-items: center;
}

.card .actions {
    margin-top: auto;
    display: flex;
    gap: 8px;
}

.small {
    font-size: .9rem;
    color: var(--muted);
}



/* project page layout */
.project-container {
    display: grid;
    grid-template-columns: 260px minmax(0, 1fr);
    gap: 18px;
    margin-top: 20px;
}

.toc {
    background: var(--card);
    padding: 12px;
    border-radius: 10px;
    position: sticky;
    top: 84px;
    height: calc(100vh - 120px);
    overflow: auto;
}

.toc h4 {
    margin: 0 0 8px 0;
}

.toc a {
    display: block;
    padding: 6px 4px;
    color: var(--muted);
    text-decoration: none;
    border-radius: 6px;
}

.toc a:hover {
    background: var(--glass);
    color: var(--text);
}

.doc {
    background: var(--card);
    padding: 18px;
    border-radius: 12px;
    min-height: 60vh;
    min-width: 0;
}

/* markdown & code */
.markdown-content {
    max-width: 100%;
    overflow-wrap: anywhere;
    color: var(--text);
}

/* Use a theme-aware variable for code block bg */
.markdown-content pre {
    background: var(--code-bg);
    padding: 12px;
    border-radius: 8px;
    overflow: auto;
    color: var(--text);
    max-width: 100%;
}

/* headings and code font */
.markdown-content h1,
.markdown-content h2,
.markdown-content h3 {
    margin-top: 1.2rem;
}

.markdown-content code {
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, "Roboto Mono", monospace;
    color: var(--text);
}

/* ensure long inline code & words wrap */
.markdown-content code {
    word-break: break-word;
}

.markdown-content pre code {
    white-space: pre;
}

/* copy btn inside pre */
.copy-btn {
    font-size: .8rem;
    border: 1px solid rgba(255, 255, 255, 0.06);
    background: transparent;
    padding: 6px 8px;
    border-radius: 8px;
    cursor: pointer;
    margin-left: 8px;
}

.site-footer {
    margin: 40px 0 80px;
    color: var(--muted);
    text-align: center;
}

/* responsive */
@media (max-width: 900px) {
    .project-container {
        grid-template-columns: 1fr;
    }

    .toc {
        position: relative;
        height: auto;
    }

    .header-inner {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }

    .name {
        font-size: 1.4rem;
    }

    .icon-link {
        width: 36px;
        height: 36px;
    }
}

/* 1) header height variable for consistent offsets */
:root {
    --header-height: 84px;
    /* tune this if your header size changes */
}

/* 2) When jumping to anchors, make sure headings appear below the sticky header */
.markdown-content h1,
.markdown-content h2,
.markdown-content h3 {
    /* add a margin for scrolling so headings are visible */
    scroll-margin-top: calc(var(--header-height) + 12px);
}

/* 3) On small screens hide the TOC to prevent overlap (mobile-friendly) */
@media (max-width: 900px) {
    .toc {
        display: none;
        /* hide TOC on mobile so it doesn't block the title */
        /* if you prefer collapsible TOC instead of hiding, see notes below */
    }

    /* ensure doc area can use full width and doesn't get pushed */
    .project-container {
        grid-template-columns: 1fr;
    }

    /* slightly increase top padding so the H1 doesn't sit flush under header */
    .doc {
        padding-top: 22px;
        min-width: 0;
    }
}

/* 4) defensive rule: prevent children from forcing page width (helps overflow) */
.doc,
.markdown-content {
    min-width: 0;
    word-break: break-word;
}

/* -------- spacing tweaks ---------- */

/* 1) more space between main content and footer site-wide */
.site-footer {
    margin: 100px 0 120px;
}

/* 2) give the header brand (back link + title) more horizontal breathing room */
body.project .brand {
    display: flex;
    align-items: center;
    gap: 16px;
    /* space between back link and name */
}

.brand .back {
    margin-right: 6px;
    /* extra nudge (optional) */
    color: var(--muted);
    text-decoration: none;
    font-weight: 600;
}

/* --- NEW: more vertical breathing room in header --- */
/* apply only on project pages */
body.project :root {
    --header-height: 96px;
}

body.project .site-header .header-inner {
    padding-top: 22px;
    padding-bottom: 22px;
    padding-left: 24px;
    padding-right: 24px;
}

/* 3) small-screen adjustments */
@media (max-width: 900px) {
    .site-footer {
        margin: 60px 0 80px;
    }

    .brand {
        gap: 10px;
    }

    .brand .back {
        margin-right: 4px;
    }

    body.project :root {
        --header-height: 76px;
    }

    body.project .site-header .header-inner {
        padding-top: 14px;
        padding-bottom: 14px;
        padding-left: 20px;
        padding-right: 20px;
    }
}

/* Markdown & TOC link colors (applies to both sidebar TOC and any TOC/links inside rendered markdown) */

/* Sidebar TOC (existing) */
.toc a {
    color: var(--muted);
    /* default neutral color */
    text-decoration: none;
    padding: 6px 6px;
    display: block;
    border-radius: 6px;
    transition: background 150ms ease, color 150ms ease;
}

/* Links inside the rendered markdown (including markdown-generated TOC) */
.markdown-content a {
    color: var(--accent);
    /* change this to whatever highlight color you want */
    text-decoration: underline;
    /* optional: underline for clarity */
    transition: color 150ms ease, background 150ms ease;
}

/* Hover for both */
.toc a:hover,
.markdown-content a:hover {
    background: rgba(0, 0, 0, 0.04);
    /* subtle hover; theme-aware overrides below */
    color: var(--text);
}

/* Visited links shouldn't keep the browser default color */
.toc a:visited,
.markdown-content a:visited {
    color: var(--muted);
}

/* Focus for keyboard accessibility */
.toc a:focus,
.markdown-content a:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(11, 116, 209, 0.10);
    background: rgba(11, 116, 209, 0.06);
}

/* Active/selected TOC item (sidebar) */
.toc a.active {
    background: var(--accent);
    color: #fff;
}

/* Theme-aware tweaks for dark mode */
[data-theme="dark"] .toc a:hover,
[data-theme="dark"] .markdown-content a:hover {
    background: rgba(255, 255, 255, 0.03);
}

[data-theme="dark"] .markdown-content a {
    color: var(--accent);
    /* keeps accent appropriate in dark theme */
}

[data-theme="dark"] .toc a:focus,
[data-theme="dark"] .markdown-content a:focus {
    box-shadow: 0 0 0 3px rgba(58, 160, 255, 0.10);
}

/* General code block styling */
pre[class*="language-"],
code[class*="language-"] {
    background: #1e1e1e !important;
    /* dark background */
    color: #d4d4d4 !important;
    /* light text */
}

/* Comments */
.token.comment {
    color: #6a9955 !important;
    /* greenish */
}

/* Strings */
.token.string {
    color: #ce9178 !important;
    /* reddish */
}

/* Keywords / commands */
.token.keyword,
.token.builtin {
    color: #569cd6 !important;
    /* bluish */
}