/* ============================================================
   GFG-STYLE THEME — GeeksforGeeks-inspired green, content-first
   Loaded AFTER style.css; light, clean, readable. All free.
   ============================================================ */

/* ---- Brand tokens (green) — apply in both themes ---------- */
:root {
    --primary:        #2f8d46;
    --primary-dark:   #1f6e35;
    --primary-light:  #e7f6ec;
    --accent:         #2f8d46;
    --accent-dark:    #1f6e35;
    --gfg-green:      #2f8d46;
    --gfg-green-d:    #1f6e35;
    --gfg-ink:        #2f2f2f;
    --gfg-line:       #e5e8eb;
    --gfg-soft:       #f6f8f7;
}

/* Light is the GFG default look */
:root:not([data-theme="dark"]) {
    --text:        #2f2f2f;
    --text-light:  #4d4d4d;
    --text-muted:  #6b7280;
    --bg:          #ffffff;
    --bg-light:    #f6f8f7;
    --border:      #e5e8eb;
    --card-bg:     #ffffff;
}
:root:not([data-theme="dark"]) body { background: #f6f8f7; }

/* ============================================================
   TOP NAV — white, green brand (GFG header)
   ============================================================ */
:root:not([data-theme="dark"]) .platform-bar {
    background: #ffffff !important;
    border-bottom: 1px solid var(--gfg-line);
    box-shadow: 0 1px 6px rgba(0,0,0,.05);
    backdrop-filter: none !important; -webkit-backdrop-filter: none !important;
}
.nav-accent-line { background: var(--gfg-green) !important; height: 3px; }
.nav-logo-mark {
    background: linear-gradient(135deg, #2f8d46, #1f6e35) !important;
    box-shadow: 0 2px 8px rgba(47,141,70,.35);
}
:root:not([data-theme="dark"]) .nav-logo-usa     { color: var(--gfg-green) !important; }
:root:not([data-theme="dark"]) .nav-logo-content { color: #1a1a1a !important; }
:root:not([data-theme="dark"]) .nav-logo-sep     { color: var(--gfg-line) !important; }
:root:not([data-theme="dark"]) .nav-link { color: #4a4a4a !important; font-weight: 600; position: relative; }
:root:not([data-theme="dark"]) .nav-link:hover { color: var(--gfg-green) !important; }
.nav-link::after {
    content: ""; position: absolute; left: 0; right: 0; bottom: -4px; height: 2px;
    background: var(--gfg-green); transform: scaleX(0); transform-origin: left;
    transition: transform .2s;
}
.nav-link:hover::after { transform: scaleX(1); }

.nav-btn-filled {
    background: var(--gfg-green) !important; color: #fff !important;
    border: 1px solid var(--gfg-green) !important; font-weight: 700;
}
.nav-btn-filled:hover { background: var(--gfg-green-d) !important; }
:root:not([data-theme="dark"]) .nav-btn-ghost,
:root:not([data-theme="dark"]) .nav-btn-outline {
    color: var(--gfg-green) !important; border-color: var(--gfg-green) !important;
}
:root:not([data-theme="dark"]) .nav-btn-ghost:hover,
:root:not([data-theme="dark"]) .nav-btn-outline:hover { background: var(--primary-light) !important; }
:root:not([data-theme="dark"]) .nav-icon-btn { color: #4a4a4a; }

/* ============================================================
   HERO / category rail — GFG green chips
   ============================================================ */
.cat-chip {
    border-radius: 6px !important;
    font-weight: 600 !important;
}
.cat-chip:hover, .cat-chip.active {
    background: var(--gfg-green) !important;
    border-color: var(--gfg-green) !important;
    color: #fff !important;
    box-shadow: 0 2px 8px rgba(47,141,70,.25) !important;
}

/* ============================================================
   ARTICLE CARDS — GFG list style (white, green top accent)
   ============================================================ */
:root:not([data-theme="dark"]) .article-card {
    background: #fff !important;
    border: 1px solid var(--gfg-line) !important;
    border-radius: 8px !important;
    box-shadow: 0 1px 3px rgba(0,0,0,.06) !important;
    transition: box-shadow .2s, transform .2s, border-color .2s;
    position: relative;
}
.article-card { overflow: hidden; }
.article-card::before {
    content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px;
    background: var(--gfg-green); transform: scaleX(0); transform-origin: left;
    transition: transform .25s; z-index: 2;
}
:root:not([data-theme="dark"]) .article-card:hover {
    box-shadow: 0 8px 22px rgba(0,0,0,.10) !important;
    border-color: #cfe6d6 !important;
    transform: translateY(-3px);
}
.article-card:hover::before { transform: scaleX(1); }

/* category pill on card */
.card-body a[href*="/pub/"], .card-body div > a[style*="primary-light"] {
    border-radius: 5px !important;
}

/* read-more → green with arrow */
.read-more { color: var(--gfg-green) !important; font-weight: 700; }
.article-card:hover .read-more { gap: 9px; }
.read-more::after { content: " ›"; }

/* section header bar green */
.section-header h2::before, .articles-list h2::after { background: var(--gfg-green) !important; }
.articles-list h2 { border-bottom-color: var(--primary-light) !important; }

/* ============================================================
   ARTICLE READING PAGE — clean GFG tutorial look
   ============================================================ */
:root:not([data-theme="dark"]) .article-full {
    background: #fff !important;
    border: 1px solid var(--gfg-line) !important;
    border-radius: 10px !important;
    box-shadow: 0 1px 4px rgba(0,0,0,.05) !important;
}
:root:not([data-theme="dark"]) .article-header h1 { color: #1a1a1a; }
:root:not([data-theme="dark"]) .article-body { color: #2f2f2f; font-size: 1.08rem; }

/* GFG-style green section headings with left bar */
.article-body h2 {
    padding: 6px 0 8px 14px !important;
    position: relative;
}
:root:not([data-theme="dark"]) .article-body h2 {
    color: #1a1a1a !important;
    border-bottom: 1px solid var(--gfg-line) !important;
}
.article-body h2::before {
    content: "" !important; position: absolute !important;
    left: 0 !important; top: 50% !important; bottom: auto !important;
    transform: translateY(-50%);
    width: 5px !important; height: 1.05em !important;
    background: var(--gfg-green) !important; border-radius: 3px;
}
:root:not([data-theme="dark"]) .article-body h3 { color: #222; }
:root:not([data-theme="dark"]) .article-body a {
    color: var(--gfg-green); text-decoration-color: rgba(47,141,70,.4);
}
:root:not([data-theme="dark"]) .article-body a:hover { color: var(--gfg-green-d); }
.article-body li::marker { color: var(--gfg-green) !important; }

/* GFG code blocks — light gray with green left rail + copy-friendly */
:root:not([data-theme="dark"]) .article-body pre {
    background: #f4f6f8 !important;
    border: 1px solid var(--gfg-line) !important;
    border-left: 4px solid var(--gfg-green) !important;
    border-radius: 8px !important;
    font-size: .92rem;
    line-height: 1.6;
}
:root:not([data-theme="dark"]) .article-body code {
    background: var(--primary-light) !important;
    color: var(--gfg-green-d) !important;
    border-radius: 4px;
}
:root:not([data-theme="dark"]) .article-body pre code { background: none !important; color: #1f2937 !important; }

/* tags + related green */
.article-tags a, .tag-link {
    background: var(--primary-light) !important; color: var(--gfg-green-d) !important;
    border-radius: 5px !important;
}
.article-tags a:hover, .tag-link:hover { background: var(--gfg-green) !important; color: #fff !important; }
.related-articles { border-top-color: var(--primary-light) !important; }

/* ============================================================
   BUTTONS (load more, newsletter) → green
   ============================================================ */
:root:not([data-theme="dark"]) #loadMoreBtn,
:root:not([data-theme="dark"]) .sidebar-section button[type="submit"],
:root:not([data-theme="dark"]) .newsletter-footer button {
    background: var(--gfg-green) !important; color: #fff !important; border: none !important;
    border-radius: 6px !important;
}
:root:not([data-theme="dark"]) #loadMoreBtn:hover { background: var(--gfg-green-d) !important; }

/* sidebar cards */
:root:not([data-theme="dark"]) .sidebar-section {
    background: #fff !important; border: 1px solid var(--gfg-line) !important;
    border-radius: 8px !important; box-shadow: 0 1px 3px rgba(0,0,0,.05) !important;
}

/* ============================================================
   FOOTER — green top accent on the existing dark footer
   ============================================================ */
.footer-status-dot { background: var(--gfg-green) !important; }
.reading-progress { background: linear-gradient(90deg, var(--gfg-green), #54c172) !important; }
.back-to-top { background: var(--gfg-green) !important; }

/* ============================================================
   CODE COPY BUTTON (GFG-style)
   ============================================================ */
.article-body pre { position: relative; padding-top: 40px !important; }
.code-copy-btn {
    position: absolute; top: 8px; right: 8px;
    display: inline-flex; align-items: center; gap: 5px;
    font: 700 .72rem/1 'Inter', sans-serif;
    padding: 6px 13px; border-radius: 6px;
    border: 1px solid var(--gfg-line, #e5e8eb);
    background: var(--card-bg, #fff);
    color: var(--gfg-green-d, #1f6e35);
    cursor: pointer; opacity: .55;
    transition: opacity .2s, background .2s, color .2s, border-color .2s;
}
.article-body pre:hover .code-copy-btn { opacity: 1; }
.code-copy-btn:hover { background: var(--gfg-green, #2f8d46); color: #fff; border-color: var(--gfg-green, #2f8d46); }
.code-copy-btn.copied { background: var(--gfg-green, #2f8d46); color: #fff; border-color: var(--gfg-green, #2f8d46); opacity: 1; }
.code-copy-btn::before { content: "⧉"; font-size: .85rem; }
.code-copy-btn.copied::before { content: "✓"; }

/* Last-Updated pill + author byline (article meta) */
.article-meta .updated-on {
    background: var(--primary-light) !important;
    color: var(--gfg-green-d) !important;
    padding: 3px 10px; border-radius: 20px;
    font-weight: 700; font-size: .78rem;
}
.article-meta .article-author { font-weight: 600; color: var(--text-light); }

/* ============================================================
   FIX: article card padding (.article-full lost the padding that
   lived on the legacy .article-content) — so the cover image
   (margin:0 -44px) bled past the card edges. Restore padding and
   hard-reset any transform so the cover can never tilt/overflow.
   ============================================================ */
.article-full { padding: 36px 44px; }
@media (max-width: 768px) { .article-full { padding: 22px 20px; } }
@media (max-width: 480px) { .article-full { padding: 16px 14px; } }

.article-cover { transform: none !important; rotate: 0deg !important; overflow: hidden; }
.article-cover img { transform: none !important; rotate: 0deg !important; display: block; width: 100%; }

/* ============================================================
   GFG-STYLE LEFT TOPIC SIDEBAR (article + publication pages)
   ============================================================ */
main.container:has(.topic-sidebar) {
    grid-template-columns: 270px minmax(0, 1fr) !important;
    max-width: 1440px !important;
    gap: 36px !important;
    align-items: start !important;
}
main.container:has(.topic-sidebar) > *:not(.topic-sidebar) { grid-column: 2 !important; }
.topic-sidebar {
    grid-column: 1 !important;
    grid-row: 1 / -1;
    position: sticky; top: 78px; align-self: start;
    max-height: calc(100vh - 96px); overflow-y: auto;
}
.topic-sidebar-inner {
    background: #fff;
    border: 1px solid var(--gfg-line, #e5e8eb);
    border-radius: 10px;
    padding: 16px 14px;
    box-shadow: 0 1px 3px rgba(0,0,0,.05);
}
[data-theme="dark"] .topic-sidebar-inner { background: var(--card-bg); border-color: var(--border); }
.topic-head {
    display: flex; align-items: center; gap: 7px;
    font-weight: 800; font-size: 1rem; color: #1a1a1a;
    padding: 4px 8px 12px; border-bottom: 2px solid var(--gfg-green, #2f8d46);
    margin-bottom: 10px;
}
[data-theme="dark"] .topic-head { color: var(--text); }
.topic-head .topic-ic { font-size: 1.15rem; }
.topic-sub {
    font-size: .7rem; font-weight: 700; text-transform: uppercase;
    letter-spacing: .09em; color: var(--text-muted, #6b7280);
    padding: 0 8px 6px;
}
.topic-sub-2 { padding-top: 8px; border-top: 1px solid var(--gfg-line, #e5e8eb); }
.topic-list { display: flex; flex-direction: column; }
.topic-list a {
    display: block; padding: 7px 10px; border-radius: 6px;
    font-size: .86rem; line-height: 1.35; color: #3a3a3a;
    text-decoration: none; border-left: 3px solid transparent;
    transition: background .15s, color .15s, border-color .15s;
}
[data-theme="dark"] .topic-list a { color: var(--text-light); }
.topic-list a:hover {
    background: var(--primary-light, #e7f6ec);
    color: var(--gfg-green-d, #1f6e35);
    border-left-color: var(--gfg-green, #2f8d46);
}
.topic-list.topic-more a { font-size: .82rem; color: var(--text-light, #4d4d4d); }
.topic-allbtn {
    display: block; text-align: center; margin-top: 14px;
    padding: 9px; border-radius: 6px;
    background: var(--gfg-green, #2f8d46); color: #fff !important;
    font-weight: 700; font-size: .82rem; text-decoration: none;
}
.topic-allbtn:hover { background: var(--gfg-green-d, #1f6e35); }

/* collapse to single column below 1024px (content keeps TOC + breadcrumbs) */
@media (max-width: 1024px) {
    main.container:has(.topic-sidebar) { grid-template-columns: 1fr !important; max-width: 900px !important; }
    main.container:has(.topic-sidebar) > *:not(.topic-sidebar) { grid-column: 1 !important; }
    .topic-sidebar { display: none !important; }
}

/* ============================================================
   DARK MODE — eye-comfort reading experience
   (the legacy dark body text #94a3b8 was too dim, on no card)
   ============================================================ */
[data-theme="dark"] body { background: #0f1420; }
[data-theme="dark"] { --text-light: #d3dae7; --text: #eef2f8; }

/* a defined reading panel instead of bare page background */
[data-theme="dark"] .article-full {
    background: #171d2b !important;
    border: 1px solid #283143 !important;
    border-radius: 10px;
    box-shadow: 0 1px 6px rgba(0,0,0,.45);
}

/* body copy: brighter, slightly larger, relaxed line-height, off-white
   (not pure white → avoids halation/glare) */
[data-theme="dark"] .article-body {
    color: #d6dce8 !important;
    font-size: 1.09rem;
    line-height: 1.85;
    letter-spacing: .002em;
}
[data-theme="dark"] .article-body > p:first-of-type { color: #e8ecf4 !important; }
[data-theme="dark"] .article-header h1 { color: #f4f7fb !important; }
[data-theme="dark"] .article-subtitle { color: #aeb7c8 !important; }
[data-theme="dark"] .article-body h2,
[data-theme="dark"] .article-body h3 { color: #f2f5fa !important; }
[data-theme="dark"] .article-body h2 { border-bottom-color: #2a3445 !important; }
[data-theme="dark"] .article-body strong,
[data-theme="dark"] .article-body b { color: #f4f7fb !important; }

/* links + markers: lighter green for AA contrast on dark */
[data-theme="dark"] .article-body a { color: #74d68d; text-decoration-color: rgba(116,214,141,.45); }
[data-theme="dark"] .article-body a:hover { color: #93e1a8; }
[data-theme="dark"] .article-body li::marker { color: #54c172 !important; }

/* code: comfortable dark surface */
[data-theme="dark"] .article-body pre {
    background: #0d1117 !important;
    border: 1px solid #283143 !important;
    border-left: 4px solid #2f8d46 !important;
}
[data-theme="dark"] .article-body pre code { color: #d6dce8 !important; }
[data-theme="dark"] .article-body code { background: #1c2536 !important; color: #84dc9c !important; }

/* blockquotes / tables readable */
[data-theme="dark"] .article-body blockquote { color: #c4ccdb !important; border-left-color: #2f8d46 !important; }
[data-theme="dark"] .article-body td,
[data-theme="dark"] .article-body th { border-color: #283143 !important; color: #d6dce8; }

/* ============================================================
   MEMBER: Follow button + list header row
   ============================================================ */
.list-head-row { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.follow-btn {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 8px 18px; border-radius: 30px;
    border: 1.5px solid var(--gfg-green, #2f8d46);
    background: var(--gfg-green, #2f8d46); color: #fff !important;
    font-weight: 700; font-size: .85rem; cursor: pointer;
    text-decoration: none; white-space: nowrap; transition: all .18s;
}
.follow-btn:hover { background: var(--gfg-green-d, #1f6e35); }
.follow-btn.following { background: transparent; color: var(--gfg-green, #2f8d46) !important; }
.follow-btn.following:hover { background: var(--primary-light, #e7f6ec); }
.member-rail .articles-grid { grid-template-columns: repeat(auto-fill, minmax(min(280px,100%),1fr)); }