/* ─────────────────────────────────────────────────────────────────────────
   sergiosUpdatedCTrainingStyles.css
   TNT | Sergio's Slime Sprite — Cross Training: JS, Java & Python
   Slime-green theme + three color-keyed computer-paper code panels.
   Yellow paper = JavaScript  |  Blue paper = Java  |  Green paper = Python
──────────────────────────────────────────────────────────────────────────── */

:root {
    --sl-green:  #5CB85C;
    --sl-dark:   #2E7D32;
    --sl-light:  #a5d6a7;
    --sl-bg:     #0a120a;
    --sl-navy:   #0a180a;
    --sl-mid:    #0f1c0f;

    /* ── JavaScript: yellow computer-paper ─────────────────────────────── */
    --js-row-a:    #fffef2;
    --js-row-b:    #fff3a0;
    --js-num:      #7a5c00;
    --js-text:     #1a1200;
    --js-hdr:      #1a1500;
    --js-hdr-bd:   #c8a000;
    --js-footer:   #1a1500;
    --js-kw:       #0000bb;
    --js-cmt:      #446633;
    --js-str:      #aa2200;
    --js-num-lit:  #770099;

    /* ── Java: blue computer-paper ─────────────────────────────────────── */
    --java-row-a:   #f4f9ff;
    --java-row-b:   #b8d5f0;
    --java-num:     #003d80;
    --java-text:    #001020;
    --java-hdr:     #001428;
    --java-hdr-bd:  #3380cc;
    --java-footer:  #001428;
    --java-kw:      #000099;
    --java-cmt:     #005540;
    --java-str:     #990000;
    --java-num-lit: #660099;

    /* ── Python: green computer-paper ──────────────────────────────────── */
    --py-row-a:   #f4fff6;
    --py-row-b:   #a8dcb8;
    --py-num:     #004422;
    --py-text:    #001008;
    --py-hdr:     #001408;
    --py-hdr-bd:  #2a9944;
    --py-footer:  #001408;
    --py-kw:      #000099;
    --py-cmt:     #004400;
    --py-str:     #990000;
    --py-num-lit: #660099;
}

body { background: var(--sl-bg); color: rgba(255,255,255,0.85); }

/* ── Spark bar ─────────────────────────────────────────────────────────── */
.spark-bar {
    background: var(--sl-navy);
    padding: 0.52rem 1.2rem;
    display: flex; align-items: center; flex-wrap: wrap; gap: 1.2rem;
    border-bottom: 2px solid var(--sl-dark);
    font-size: 0.88rem;
}
.spark-links { display: flex; gap: 1.2rem; align-items: center; flex-wrap: wrap; }
.spark-links a { color: var(--sl-light); font-weight: 700; text-decoration: none; }
.spark-links a:hover { color: #fff; text-decoration: underline; }
.spark-bar > span { color: rgba(255,255,255,0.35); font-size: 0.80rem; margin-left: auto; }

/* ── Hero ──────────────────────────────────────────────────────────────── */
#hero {
    min-height: 28vh;
    background:
        linear-gradient(135deg, rgba(8,20,8,0.88) 0%, rgba(20,60,20,0.78) 100%),
        url('../images/Grass_Sample.png') center / cover no-repeat;
    background-color: var(--sl-bg);
    padding: 4rem 1rem 3rem;
    color: #fff;
    text-align: center;
}
.hero-content { max-width: 820px; margin: 0 auto; }
.hero-eyebrow {
    font-size: 0.72rem; letter-spacing: 3px; text-transform: uppercase;
    color: rgba(255,255,255,0.50); display: block; margin-bottom: 0.65rem;
}
.hero-title {
    font-family: 'Boogaloo', cursive;
    font-size: clamp(1.9rem, 5vw, 3.2rem);
    line-height: 1.12; margin-bottom: 0.75rem;
    color: var(--sl-light);
}
.hero-subtitle {
    font-size: clamp(0.88rem, 2vw, 1.05rem);
    color: rgba(255,255,255,0.70); line-height: 1.68;
    max-width: 680px; margin: 0 auto;
}

/* ── Language key row (hero) ───────────────────────────────────────────── */
.lang-key {
    display: flex; flex-wrap: wrap; gap: 0.5rem; justify-content: center;
    margin-top: 1.2rem;
}
.lang-key-pill {
    display: inline-flex; align-items: center; gap: 0.35rem;
    font-size: 0.75rem; font-weight: 700; letter-spacing: 0.5px;
    padding: 0.22rem 0.75rem; border-radius: 50px; border: 1px solid;
}
.lk-js   { border-color: rgba(247,223,30,0.50);  color: #f7df1e;  background: rgba(247,223,30,0.08);  }
.lk-java { border-color: rgba(90,200,245,0.50);  color: #5ac8f5;  background: rgba(90,200,245,0.08);  }
.lk-py   { border-color: rgba(74,222,128,0.50);  color: #4ade80;  background: rgba(74,222,128,0.08);  }
.lk-dot  { width: 8px; height: 8px; border-radius: 50%; }
.lk-dot-js   { background: #f7df1e; }
.lk-dot-java { background: #5ac8f5; }
.lk-dot-py   { background: #4ade80; }

/* ── Concepts section ──────────────────────────────────────────────────── */
#concepts {
    background: #f4f5f7;
    padding: 4.5rem 0;
}
.concepts-label {
    font-size: 0.70rem; letter-spacing: 3px; text-transform: uppercase;
    font-weight: 700; color: var(--sl-dark); margin-bottom: 0.4rem;
}
.concepts-title {
    font-family: 'Boogaloo', cursive;
    font-size: clamp(1.7rem, 3.5vw, 2.5rem);
    color: #0a0e1a; margin-bottom: 0.5rem;
}
.concepts-sub {
    font-size: 0.92rem; color: #555; margin-bottom: 2.5rem; line-height: 1.65;
}

.concept-card {
    background: #fff;
    border: 1.5px solid #e2e4e8;
    border-top: 4px solid var(--sl-green);
    border-radius: 14px;
    padding: 1.5rem 1.4rem;
    height: 100%;
}
.concept-card-icon  { font-size: 1.9rem; margin-bottom: 0.45rem; }
.concept-card-title {
    font-family: 'Boogaloo', cursive;
    font-size: 1.15rem; color: #0a0e1a; margin-bottom: 0.4rem;
}
.concept-card-body  { font-size: 0.875rem; color: #555; line-height: 1.65; margin: 0; }
.concept-card-body code {
    background: #f0f0f4; padding: 1px 5px; border-radius: 3px;
    font-family: 'Source Code Pro', monospace; font-size: 0.85em; color: #1a1a2a;
}
.concept-card-body strong { color: #1a1a2a; }
.concept-card-body .formula {
    display: block; margin: 0.55rem 0;
    background: #f1f8e9; border-left: 3px solid var(--sl-green);
    border-radius: 0 6px 6px 0; padding: 0.4rem 0.75rem;
    font-family: 'Source Code Pro', monospace; font-size: 0.82em; color: #1a2e1a;
}

/* Language badges inside concept cards */
.concept-lang-row { display: flex; gap: 0.4rem; flex-wrap: wrap; margin-top: 0.65rem; }
.clb { font-size: 0.68rem; font-weight: 700; padding: 0.15rem 0.55rem; border-radius: 50px; border: 1px solid; }
.clb-js   { border-color: #d4b000; color: #7a5800;  background: #fffbe0; }
.clb-java { border-color: #3380cc; color: #003d80;  background: #e8f3fc; }
.clb-py   { border-color: #2a9944; color: #004422;  background: #e8fce8; }

/* ── Code comparison section ───────────────────────────────────────────── */
#codeComparison {
    background: var(--sl-bg);
    padding: 5rem 0;
}
.code-section-label {
    font-size: 0.70rem; letter-spacing: 3px; text-transform: uppercase;
    font-weight: 700; color: var(--sl-green); margin-bottom: 0.4rem;
}
.code-section-title {
    font-family: 'Boogaloo', cursive;
    font-size: clamp(1.7rem, 3.5vw, 2.5rem);
    color: #fff; margin-bottom: 0.5rem;
}
.code-section-sub {
    font-size: 0.88rem; color: rgba(255,255,255,0.45);
    margin-bottom: 2.5rem; font-style: italic;
}

/* ── Language panel ────────────────────────────────────────────────────── */
.lang-panel {
    border-radius: 14px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    height: 100%;
    box-shadow: 0 4px 24px rgba(0,0,0,0.45);
}

/* ── Panel headers ─────────────────────────────────────────────────────── */
.lang-header {
    display: flex; align-items: center; gap: 0.55rem;
    padding: 0.65rem 1rem; border-bottom: 2px solid; flex-shrink: 0;
}
.lang-header-js   { background: var(--js-hdr);   border-color: var(--js-hdr-bd);   }
.lang-header-java { background: var(--java-hdr);  border-color: var(--java-hdr-bd); }
.lang-header-py   { background: var(--py-hdr);    border-color: var(--py-hdr-bd);   }

.lang-dot { width: 10px; height: 10px; border-radius: 50%; flex-shrink: 0; }
.lang-dot-js   { background: #f7df1e; }
.lang-dot-java { background: #5ac8f5; }
.lang-dot-py   { background: #4ade80; }

.lang-name {
    font-family: 'Boogaloo', cursive; font-size: 1.1rem; color: #fff;
}
.lang-filename {
    font-family: 'Source Code Pro', monospace; font-size: 0.73rem;
    color: rgba(255,255,255,0.42); flex: 1;
}

.lang-copy-btn {
    background: rgba(255,255,255,0.07);
    border: 1px solid rgba(255,255,255,0.20); border-radius: 5px;
    color: rgba(255,255,255,0.65); font-size: 0.72rem; padding: 3px 10px;
    cursor: pointer; display: flex; align-items: center; gap: 5px;
    transition: all 0.18s; font-family: inherit;
}
.lang-copy-btn:hover { background: rgba(255,255,255,0.14); color: #fff; }

/* ── Colored computer-paper code areas ─────────────────────────────────── */
.code-paper {
    flex: 1; overflow-y: auto; max-height: 680px;
    font-family: 'Source Code Pro', monospace;
    font-size: 0.775rem; line-height: 1.62;
    counter-reset: lineno;
}
.code-paper ol { list-style: none; margin: 0; padding: 0; }
.code-paper li {
    display: flex; counter-increment: lineno;
    padding: 0 0.75rem 0 0;
}
.code-paper li::before {
    content: counter(lineno);
    min-width: 2.5rem; text-align: right;
    padding-right: 0.85rem;
    user-select: none; flex-shrink: 0;
    font-size: 0.70rem; line-height: inherit;
}
.code-paper code { white-space: pre; }

/* ── JavaScript / yellow paper ─────────────────────────────────────────── */
.code-paper-js { background: var(--js-row-a); }
.code-paper-js li:nth-child(even)  { background: var(--js-row-b); }
.code-paper-js li::before          { color: var(--js-num); }
.code-paper-js code                { color: var(--js-text); }
.code-paper-js .kw  { color: var(--js-kw);      font-weight: 700; }
.code-paper-js .cm  { color: var(--js-cmt);     font-style: italic; }
.code-paper-js .st  { color: var(--js-str); }
.code-paper-js .nm  { color: var(--js-num-lit); }

/* ── Java / blue paper ──────────────────────────────────────────────────── */
.code-paper-java { background: var(--java-row-a); }
.code-paper-java li:nth-child(even) { background: var(--java-row-b); }
.code-paper-java li::before         { color: var(--java-num); }
.code-paper-java code               { color: var(--java-text); }
.code-paper-java .kw  { color: var(--java-kw);      font-weight: 700; }
.code-paper-java .cm  { color: var(--java-cmt);     font-style: italic; }
.code-paper-java .st  { color: var(--java-str); }
.code-paper-java .nm  { color: var(--java-num-lit); }

/* ── Python / green paper ───────────────────────────────────────────────── */
.code-paper-py { background: var(--py-row-a); }
.code-paper-py li:nth-child(even)  { background: var(--py-row-b); }
.code-paper-py li::before          { color: var(--py-num); }
.code-paper-py code                { color: var(--py-text); }
.code-paper-py .kw  { color: var(--py-kw);      font-weight: 700; }
.code-paper-py .cm  { color: var(--py-cmt);     font-style: italic; }
.code-paper-py .st  { color: var(--py-str); }
.code-paper-py .nm  { color: var(--py-num-lit); }

/* ── Panel footers ─────────────────────────────────────────────────────── */
.lang-footer {
    padding: 0.6rem 1rem; font-size: 0.76rem;
    color: rgba(255,255,255,0.50); flex-shrink: 0;
}
.lang-footer-js   { background: var(--js-footer);   border-top: 1px solid rgba(200,160,0,0.22);  }
.lang-footer-java { background: var(--java-footer);  border-top: 1px solid rgba(51,128,204,0.22); }
.lang-footer-py   { background: var(--py-footer);    border-top: 1px solid rgba(42,153,68,0.22);  }
.lang-footer a { font-weight: 600; text-decoration: underline; }
.lang-footer-js   a { color: #c8a000; }
.lang-footer-java a { color: #5ac8f5; }
.lang-footer-py   a { color: #4ade80; }
.lang-footer a:hover { color: #fff; }

/* ── Source download bar ───────────────────────────────────────────────── */
.source-bar {
    margin-top: 2.5rem; padding-top: 2rem;
    border-top: 1px solid rgba(255,255,255,0.07);
    display: flex; flex-wrap: wrap; gap: 0.75rem; align-items: center;
}
.source-label {
    font-size: 0.68rem; letter-spacing: 2px; text-transform: uppercase;
    color: rgba(255,255,255,0.28); font-weight: 700; width: 100%;
}
.source-btn {
    display: inline-flex; align-items: center; gap: 0.4rem;
    padding: 0.38rem 1rem; border-radius: 50px;
    font-size: 0.78rem; font-weight: 600; text-decoration: none;
    border: 1px solid; transition: background 0.18s, transform 0.12s;
}
.source-btn:hover { transform: translateY(-1px); text-decoration: none; }
.source-btn-js   { border-color: rgba(247,223,30,0.40); color: #f7df1e; }
.source-btn-js:hover   { background: rgba(247,223,30,0.10); color: #f7df1e; }
.source-btn-java { border-color: rgba(90,200,245,0.40); color: #5ac8f5; }
.source-btn-java:hover { background: rgba(90,200,245,0.10); color: #5ac8f5; }
.source-btn-py   { border-color: rgba(74,222,128,0.40); color: #4ade80; }
.source-btn-py:hover   { background: rgba(74,222,128,0.10); color: #4ade80; }

/* ── Navigation footer ─────────────────────────────────────────────────── */
#pageNav {
    background: var(--sl-navy);
    padding: 2rem 0;
    border-top: 1px solid rgba(255,255,255,0.07);
}
.nav-links {
    display: flex; align-items: center;
    justify-content: space-between; flex-wrap: wrap; gap: 1rem;
}
.nav-btn {
    display: inline-flex; align-items: center; gap: 0.5rem;
    padding: 0.55rem 1.4rem; border-radius: 50px;
    font-size: 0.875rem; font-weight: 600; text-decoration: none;
    transition: background 0.2s, transform 0.15s;
}
.nav-btn:hover { transform: translateY(-1px); text-decoration: none; }
.nav-btn-back { border: 1.5px solid rgba(255,255,255,0.22); color: rgba(255,255,255,0.70); }
.nav-btn-back:hover  { background: rgba(255,255,255,0.08); color: #fff; }
.nav-btn-ct  { background: var(--sl-dark); color: #fff; border: none; }
.nav-btn-ct:hover  { background: #1B5E20; color: #fff; }
.nav-btn-showcase { background: var(--sl-green); color: #fff; border: none; }
.nav-btn-showcase:hover { background: #3d8b37; color: #fff; }