/* ============================================
   Smiggy's World — How-To & Bench Tools Guide
   100% Theme-Aware (Dark, Amber, Matrix, Light)
   ============================================ */

:root { --text-color: var(--text-primary); }

.howto-hero-eyebrow {
    display: inline-block; font-family: var(--font-mono); font-size: 0.74rem; font-weight: 600;
    letter-spacing: 0.1em; text-transform: uppercase; color: var(--accent); background: var(--accent-glow);
    border: 1px solid var(--border-hover); padding: 0.28rem 0.75rem; border-radius: 999px; margin-bottom: 0.85rem;
}
.howto-hero-ctas { display: flex; flex-wrap: wrap; gap: 0.75rem; justify-content: center; margin-top: 1.35rem; }
.howto-workflow-section { padding-top: 2rem; }
.howto-workflow-banner { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 1rem; margin-bottom: 1.75rem; }
.howto-wf-step { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.15rem 1.25rem; }
.howto-wf-num {
    display: inline-block; font-family: var(--font-mono); font-size: 0.7rem; font-weight: 700;
    color: var(--accent); background: var(--accent-glow); padding: 0.15rem 0.5rem; border-radius: 4px; margin-bottom: 0.4rem;
}
.howto-wf-step strong { display: block; font-family: var(--font-heading); font-size: 0.96rem; color: var(--text-color); margin-bottom: 0.3rem; }
.howto-wf-step p { font-size: 0.82rem; color: var(--text-secondary); line-height: 1.55; margin: 0; }

/* --- Chapter Navigation & Filter Strip --- */
.howto-nav-bar {
    display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 0.85rem;
    background: var(--bg-secondary); border: 1px solid var(--border); border-radius: var(--radius);
    padding: 0.9rem 1rem; margin-bottom: 2rem; position: sticky; top: calc(var(--nav-height) + 8px);
    z-index: 40; backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
}
.howto-chapter-pills { display: flex; flex-wrap: wrap; gap: 0.45rem; align-items: center; }
.howto-chap-pill {
    display: inline-flex; align-items: center; gap: 0.4rem; padding: 0.42rem 0.8rem; border-radius: 999px;
    font-family: var(--font-heading); font-size: 0.8rem; font-weight: 600; color: var(--text-secondary);
    background: var(--bg-card-solid); border: 1px solid var(--border); transition: all var(--transition); text-decoration: none;
}
.howto-chap-pill:hover, .howto-chap-pill.is-active { color: var(--accent); background: var(--accent-glow); border-color: var(--accent); }
.howto-chap-pill-num { font-family: var(--font-mono); font-size: 0.7rem; opacity: 0.8; }
.howto-search-wrap { flex: 1 1 250px; max-width: 340px; }
.howto-filter-input {
    width: 100%; padding: 0.48rem 0.85rem; background: var(--bg-primary); color: var(--text-color);
    border: 1px solid var(--border); border-radius: 8px; font-family: var(--font-body); font-size: 0.83rem;
}
.howto-filter-input:focus { outline: none; border-color: var(--accent); box-shadow: var(--shadow-glow); }

/* --- Chapter Article Card --- */
.howto-chapters-stack { display: flex; flex-direction: column; gap: 2.25rem; }
.howto-chapter { scroll-margin-top: calc(var(--nav-height) + 80px); }
.howto-chapter-header { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 0.75rem; margin-bottom: 0.85rem; }
.howto-chapter-meta, .howto-chapter-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 0.6rem; }
.howto-chapter-num {
    font-family: var(--font-mono); font-size: 0.74rem; font-weight: 700; color: var(--bg-primary);
    background: var(--accent); padding: 0.2rem 0.55rem; border-radius: 5px; letter-spacing: 0.06em;
}
.howto-chapter-badge {
    font-family: var(--font-mono); font-size: 0.75rem; color: var(--text-secondary);
    background: var(--bg-secondary); border: 1px solid var(--border); padding: 0.2rem 0.65rem; border-radius: 999px;
}
.howto-permalink {
    font-family: var(--font-mono); font-size: 0.76rem; color: var(--text-secondary);
    border: 1px solid var(--border); padding: 0.35rem 0.65rem; border-radius: 6px; background: var(--bg-secondary);
}
.howto-permalink:hover { color: var(--accent); border-color: var(--border-hover); }
.howto-chapter-title { font-family: var(--font-heading); font-size: 1.5rem; color: var(--text-color); margin-bottom: 0.55rem; }
.howto-anchor-link { color: inherit; }
.howto-chapter-summary { color: var(--text-secondary); font-size: 0.94rem; line-height: 1.7; margin-bottom: 1rem; }
.howto-related-strip {
    display: flex; flex-wrap: wrap; align-items: center; gap: 0.45rem; margin-bottom: 1.35rem;
    padding: 0.65rem 0.85rem; background: var(--bg-secondary); border: 1px solid var(--border); border-radius: 8px;
}
.howto-related-label { font-family: var(--font-mono); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-muted); margin-right: 0.25rem; }
.howto-related-chip {
    font-size: 0.78rem; font-weight: 500; padding: 0.22rem 0.65rem; border-radius: 999px;
    background: var(--bg-card-solid); border: 1px solid var(--border); color: var(--accent);
}
.howto-related-chip:hover { background: var(--accent-glow); border-color: var(--accent); }

/* --- Interactive UI Preview Window (<figure class="tool-preview-window">) --- */
.tool-preview-window {
    margin: 1.25rem 0 1.65rem; background: var(--bg-primary); border: 1px solid var(--border-hover);
    border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow);
}
.tpw-titlebar {
    display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 0.5rem;
    padding: 0.55rem 0.95rem; background: var(--bg-secondary); border-bottom: 1px solid var(--border);
}
.tpw-dots { display: inline-flex; gap: 0.35rem; }
.tpw-dots span { width: 9px; height: 9px; border-radius: 50%; background: var(--text-muted); opacity: 0.85; }
.tpw-dots span:first-child { background: var(--error); }
.tpw-dots span:nth-child(2) { background: var(--warning); }
.tpw-dots span:nth-child(3) { background: var(--success); }
.tpw-window-title { font-family: var(--font-mono); font-size: 0.72rem; font-weight: 600; color: var(--text-secondary); letter-spacing: 0.05em; }
.tpw-status-badge {
    font-family: var(--font-mono); font-size: 0.7rem; color: var(--accent); background: var(--accent-glow);
    border: 1px solid var(--border-hover); padding: 0.12rem 0.55rem; border-radius: 999px;
}
.tpw-body { padding: 1.15rem; }
.tpw-caption { padding: 0.65rem 1rem; background: var(--bg-secondary); border-top: 1px solid var(--border); font-size: 0.8rem; color: var(--text-secondary); }
.tpw-toolbar {
    display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 0.6rem;
    margin-bottom: 1rem; padding-bottom: 0.75rem; border-bottom: 1px solid var(--border);
}
.tpw-pill-group { display: flex; flex-wrap: wrap; align-items: center; gap: 0.38rem; }
.tpw-label { font-family: var(--font-mono); font-size: 0.72rem; color: var(--text-muted); margin-right: 0.25rem; }
.tpw-pill {
    font-family: var(--font-heading); font-size: 0.75rem; font-weight: 600; color: var(--text-secondary);
    background: var(--bg-card-solid); border: 1px solid var(--border); border-radius: 999px;
    padding: 0.28rem 0.68rem; cursor: pointer; transition: all var(--transition);
}
.tpw-pill:hover, .tpw-pill.is-active { color: var(--accent); background: var(--accent-glow); border-color: var(--accent); }
.tpw-mono-tag { font-family: var(--font-mono); font-size: 0.74rem; color: var(--text-muted); }

.tpw-ic-stage, .tpw-hub-grid, .tpw-d64-grid, .tpw-conn-grid, .tpw-scope-grid, .tpw-calc-grid {
    display: grid; grid-template-columns: 1.15fr 1fr; gap: 1rem; align-items: stretch;
}
.tpw-dip-chip { background: var(--bg-secondary); border: 1px solid var(--border); border-radius: 10px; padding: 0.85rem; }
.tpw-dip-notch { width: 28px; height: 10px; margin: 0 auto 0.5rem; border: 1.5px solid var(--text-muted); border-top: none; border-radius: 0 0 14px 14px; }
.tpw-dip-cols { display: grid; grid-template-columns: 1fr auto 1fr; gap: 0.5rem; align-items: center; }
.tpw-dip-col { display: flex; flex-direction: column; gap: 0.32rem; }
.tpw-dip-core { display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 0.65rem 0.5rem; border: 1px dashed var(--border-hover); border-radius: 6px; text-align: center; }
.tpw-dip-part { font-family: var(--font-mono); font-weight: 700; font-size: 0.84rem; color: var(--accent); }
.tpw-dip-sub, .tpw-dip-hint { font-size: 0.68rem; color: var(--text-muted); }
.tpw-pin {
    display: flex; align-items: center; justify-content: space-between; gap: 0.35rem; padding: 0.25rem 0.45rem;
    background: var(--bg-primary); border: 1px solid var(--border); border-radius: 5px;
    color: var(--text-color); font-family: var(--font-mono); font-size: 0.72rem; cursor: pointer; transition: all var(--transition);
}
.tpw-pin:hover, .tpw-pin.is-selected { border-color: var(--accent); background: var(--accent-glow); }
.tpw-pin.is-dimmed { opacity: 0.28; }
.tpw-pin-num { color: var(--text-muted); font-size: 0.68rem; }
.tpw-pin-flag { font-size: 0.62rem; padding: 0.05rem 0.32rem; border-radius: 3px; background: var(--bg-secondary); color: var(--accent); border: 1px solid var(--border); }

.tpw-inspector, .tpw-hub-card, .tpw-calc-card, .tpw-showcase-card {
    background: var(--bg-secondary); border: 1px solid var(--border); border-radius: 10px; padding: 0.95rem 1.05rem;
}
.tpw-inspector-head { font-family: var(--font-mono); font-size: 0.7rem; font-weight: 700; letter-spacing: 0.07em; text-transform: uppercase; color: var(--accent); margin-bottom: 0.6rem; }
.tpw-kv { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 0.4rem; padding: 0.38rem 0; border-bottom: 1px solid var(--border); font-size: 0.8rem; }
.tpw-k { color: var(--text-muted); }
.tpw-v { color: var(--text-color); font-family: var(--font-mono); font-size: 0.78rem; }
.tpw-badge {
    display: inline-block; padding: 0.1rem 0.45rem; border-radius: 4px; font-family: var(--font-mono);
    font-size: 0.7rem; font-weight: 600; background: var(--accent-glow); color: var(--accent); border: 1px solid var(--border-hover);
}
.tpw-badge--warn { color: var(--warning); border-color: var(--warning); background: transparent; }
.tpw-badge--ok   { color: var(--success); border-color: var(--success); background: transparent; }
.tpw-badge--err  { color: var(--error);   border-color: var(--error);   background: transparent; }
.tpw-inspector-actions { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 0.75rem; }
.tpw-link-btn {
    font-family: var(--font-heading); font-size: 0.76rem; font-weight: 600; padding: 0.35rem 0.75rem;
    border-radius: 6px; background: var(--accent); color: var(--bg-primary); text-decoration: none;
}
.tpw-link-btn:hover { color: var(--bg-primary); opacity: 0.92; }
.tpw-link-btn--ghost { background: var(--bg-primary); color: var(--accent); border: 1px solid var(--border-hover); }
.tpw-link-btn--ghost:hover { color: var(--accent-hover); border-color: var(--accent); }
.tpw-mini-list { padding-left: 1.1rem; font-size: 0.8rem; color: var(--text-secondary); line-height: 1.6; }
.tpw-sub-row { display: flex; flex-direction: column; align-items: flex-start; gap: 0.25rem; padding: 0.45rem 0; border-bottom: 1px solid var(--border); font-size: 0.8rem; color: var(--text-secondary); }

.tpw-d64-disc-box, .tpw-conn-svg-box, .tpw-scope-screen {
    background: var(--bg-secondary); border: 1px solid var(--border); border-radius: 10px;
    padding: 0.85rem; display: flex; flex-direction: column; align-items: center; justify-content: center;
}
.tpw-d64-svg { width: 170px; height: 170px; }
.tpw-conn-svg { width: 185px; height: 185px; }
.tpw-svg-pin { cursor: pointer; transition: transform var(--transition); }
.tpw-svg-pin:hover circle, .tpw-svg-pin.is-selected circle { stroke: var(--warning); stroke-width: 2.8px; fill: var(--accent-glow); }
.tpw-scope-svg { width: 100%; height: auto; max-height: 150px; }
.tpw-d64-hud { width: 100%; margin-top: 0.55rem; padding: 0.45rem 0.65rem; background: var(--bg-primary); border: 1px solid var(--border); border-radius: 6px; font-size: 0.75rem; text-align: center; }
.tpw-code-block { background: var(--code-bg); border: 1px solid var(--border); border-radius: 8px; padding: 0.65rem 0.8rem; font-family: var(--font-mono); font-size: 0.76rem; }
.tpw-code-line { display: flex; flex-wrap: wrap; gap: 0.55rem; padding: 0.2rem 0; }
.tpw-addr, .tpw-cmt { color: var(--text-muted); }
.tpw-hex { color: var(--text-secondary); min-width: 64px; }
.tpw-op { color: var(--text-color); font-weight: 600; min-width: 78px; }
.tpw-ic-chip-link { color: var(--accent); font-weight: 600; }
.tpw-mini-table div { display: flex; justify-content: space-between; align-items: center; padding: 0.3rem 0; border-bottom: 1px solid var(--border); font-size: 0.78rem; }

.tpw-resistor-graphic { display: flex; align-items: center; justify-content: center; margin: 0.65rem 0; }
.tpw-lead { width: 36px; height: 4px; background: var(--text-muted); }
.tpw-res-body { display: inline-flex; align-items: stretch; gap: 10px; padding: 0 14px; height: 30px; background: var(--bg-primary); border: 2px solid var(--text-secondary); border-radius: 8px; }
.tpw-band { width: 8px; display: inline-block; background: var(--accent); }
.tpw-band--tol { margin-left: 8px; background: var(--warning); }
.tpw-band--yellow { background: var(--warning); }
.tpw-band--violet { background: var(--accent-secondary); }
.tpw-band--red    { background: var(--error); }
.tpw-band--orange { background: var(--accent-secondary); }
.tpw-band--brown  { background: var(--text-secondary); }
.tpw-band--green  { background: var(--success); }
.tpw-band--black  { background: var(--text-muted); }

.tpw-showcase-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 0.9rem; }
.tpw-showcase-card h4 { font-family: var(--font-heading); font-size: 0.95rem; color: var(--text-color); margin: 0.45rem 0 0.35rem; }
.tpw-muted { font-size: 0.78rem; color: var(--text-secondary); line-height: 1.55; margin: 0; }

/* --- Capabilities, Steps, Callouts & Matrix --- */
.howto-details-grid { display: grid; grid-template-columns: 1fr 1.25fr; gap: 1.5rem; margin-bottom: 1.35rem; }
.howto-subhead { display: flex; align-items: center; gap: 0.45rem; font-family: var(--font-heading); font-size: 1.02rem; color: var(--text-color); margin-bottom: 0.75rem; }
.howto-feature-list { padding-left: 1.15rem; color: var(--text-secondary); font-size: 0.87rem; line-height: 1.65; }
.howto-feature-list li + li { margin-top: 0.5rem; }
.howto-step-list { list-style: none; padding: 0; display: flex; flex-direction: column; gap: 0.75rem; }
.howto-step-item { display: flex; align-items: flex-start; gap: 0.75rem; padding: 0.75rem 0.9rem; background: var(--bg-secondary); border: 1px solid var(--border); border-radius: 8px; }
.howto-step-index {
    flex-shrink: 0; width: 24px; height: 24px; border-radius: 50%; background: var(--accent-glow);
    border: 1px solid var(--accent); color: var(--accent); font-family: var(--font-mono); font-size: 0.75rem;
    font-weight: 700; display: inline-flex; align-items: center; justify-content: center;
}
.howto-step-body strong { display: block; font-family: var(--font-heading); font-size: 0.9rem; color: var(--text-color); margin-bottom: 0.2rem; }
.howto-step-body p { font-size: 0.83rem; color: var(--text-secondary); line-height: 1.58; margin: 0; }

.howto-callouts-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.howto-callout { padding: 0.9rem 1.05rem; border-radius: 8px; border: 1px solid var(--border); background: var(--bg-secondary); }
.howto-callout--tip { border-left: 3px solid var(--accent); }
.howto-callout--danger { border-left: 3px solid var(--error); }
.howto-callout-title { display: flex; align-items: center; gap: 0.4rem; font-family: var(--font-mono); font-size: 0.74rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 0.35rem; }
.howto-callout--tip .howto-callout-title { color: var(--accent); }
.howto-callout--danger .howto-callout-title { color: var(--error); }
.howto-callout p { font-size: 0.82rem; color: var(--text-secondary); line-height: 1.55; margin: 0; }

.howto-matrix-subhead { font-family: var(--font-heading); font-size: 1rem; color: var(--accent); margin: 1rem 0 0.75rem; }
.howto-matrix-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 0.85rem; }
.howto-matrix-card {
    display: flex; flex-direction: column; justify-content: space-between; padding: 0.95rem 1.05rem;
    background: var(--bg-secondary); border: 1px solid var(--border); border-radius: 10px; text-decoration: none; transition: all var(--transition);
}
.howto-matrix-card:hover { border-color: var(--accent); transform: translateY(-2px); }
.howto-matrix-title { font-family: var(--font-heading); font-size: 0.92rem; font-weight: 600; color: var(--text-color); margin-bottom: 0.3rem; }
.howto-matrix-desc { font-size: 0.78rem; color: var(--text-secondary); line-height: 1.5; margin-bottom: 0.55rem; }
.howto-matrix-cta { font-family: var(--font-mono); font-size: 0.72rem; color: var(--accent); }
.howto-hub-pills { display: flex; flex-wrap: wrap; gap: 0.45rem; }
.howto-hub-pill { padding: 0.35rem 0.75rem; background: var(--bg-secondary); border: 1px solid var(--border); border-radius: 999px; font-size: 0.8rem; font-weight: 500; color: var(--text-color); }
.howto-hub-pill:hover { color: var(--accent); border-color: var(--accent); background: var(--accent-glow); }
.howto-faq-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1.15rem; margin-top: 1rem; }
.howto-faq-item { padding: 1rem; background: var(--bg-secondary); border: 1px solid var(--border); border-radius: 10px; }
.howto-faq-item h3 { font-family: var(--font-heading); font-size: 0.94rem; color: var(--text-color); margin-bottom: 0.4rem; }
.howto-faq-item p { font-size: 0.83rem; color: var(--text-secondary); line-height: 1.6; margin: 0; }

@media (max-width: 900px) {
    .tpw-ic-stage, .tpw-hub-grid, .tpw-d64-grid, .tpw-conn-grid, .tpw-scope-grid, .tpw-calc-grid, .howto-details-grid, .howto-callouts-row { grid-template-columns: 1fr; }
    .howto-nav-bar { position: static; }
}