/* ── Breadcrumb ── */
.breadcrumb-bar { background:var(--bg); border-bottom:1px solid var(--border); padding:10px 20px; font-size:0.8rem; color:var(--textcolor); }
.breadcrumb-bar a { color:#00AAFE; text-decoration:none; }
.breadcrumb-bar a:hover { text-decoration:underline; }

/* ── Page Layout ── */
.page-wrap { max-width:1200px; margin:0 auto; padding:32px 16px 60px; display:grid; grid-template-columns:1fr 268px; gap:24px; align-items:start; }
.page-title { font-size:1.45rem; font-weight:700; color:var(--heading); margin:0 0 4px; }
.page-subtitle { font-size:0.875rem; color:var(--textcolor); margin:0 0 24px; }
.card-dark { background:var(--bg2); border:1px solid var(--border); border-radius:12px; padding:22px; margin-bottom:18px; }
.card-dark h2 { font-size:1rem; font-weight:700; color:var(--heading); margin:0 0 12px; }
.card-dark p { font-size:0.88rem; color:var(--textcolor); line-height:1.7; margin:0 0 10px; }
.card-dark strong { color:var(--input-color); }

/* ── Sidebar ── */
.sidebar { display:flex; flex-direction:column; gap:14px; }
.sidebar-card { background:var(--bg2); border:1px solid var(--border); border-radius:12px; padding:16px 18px; }
.sidebar-title { font-size:0.78rem; font-weight:700; color:#9ca3af; text-transform:uppercase; letter-spacing:.07em; margin-bottom:12px; }
.ref-row { display:flex; justify-content:space-between; gap:8px; font-size:0.78rem; padding:5px 0; border-bottom:1px solid var(--bg3); }
.ref-row:last-child { border-bottom:none; }
.ref-l { color:#9ca3af; } .ref-r { color:var(--heading); font-weight:700; }

.related-item { display:flex; align-items:center; gap:12px; padding:9px 0; text-decoration:none; border-bottom:1px solid var(--bg3); }
.related-item:last-child { border-bottom:none; padding-bottom:0; }
.related-item:hover { opacity:.8; }
.related-icon { width:32px; height:32px; border-radius:8px; display:flex; align-items:center; justify-content:center; font-size:15px; flex-shrink:0; }
.related-name { font-size:0.82rem; font-weight:600; color:var(--input-color); }
.related-desc { font-size:0.74rem; color:var(--textcolor); margin-top:1px; }

.tip-row { display:flex; gap:8px; margin-bottom:9px; align-items:flex-start; }
.tip-dot { width:6px; height:6px; border-radius:50%; background:#00AAFE; flex-shrink:0; margin-top:5px; }
.tip-text { font-size:0.8rem; color:var(--textcolor); line-height:1.55; }
.tip-text strong { color:#9ca3af; }
.section-label { font-size:0.72rem; font-weight:700; color:var(--textcolor); text-transform:uppercase; letter-spacing:.07em; margin:16px 0 10px; }

/* ── Form Interactive Controls ── */
.form-group { display:flex; flex-direction:column; gap:6px; margin-bottom:14px; }
.form-label { font-size:0.78rem; font-weight:600; color:#9ca3af; }
.input-wrap { display:flex; align-items:center; background:var(--input-bg); border:1px solid var(--input-border); border-radius:8px; overflow:hidden; transition:border-color .15s, box-shadow .15s; }
.input-wrap:focus-within { border-color:#00AAFE; box-shadow:0 0 0 3px rgba(0,170,254,.15); }
.input-wrap input, .input-wrap select { flex:1; padding:9px 10px; font-size:0.9rem; font-family:'Inter',sans-serif; color:var(--input-color); background:transparent; border:none; outline:none; }
.input-wrap select option { background:var(--bg2); }
.input-prefix, .input-suffix { padding:9px 10px; font-size:0.85rem; color:var(--textcolor); background:var(--bg2); white-space:nowrap; flex-shrink:0; }
.two-col { display:grid; grid-template-columns:1fr 1fr; gap:14px; }

/* ── Precision Range Sliders ── */
.slider-group { margin-bottom:14px; }
.slider-head { display:flex; justify-content:space-between; align-items:center; margin-bottom:6px; }
.slider-lbl { font-size:0.82rem; font-weight:600; color:var(--input-color); }
.slider-val { font-size:0.85rem; font-weight:700; color:#00AAFE; min-width:36px; text-align:right; }
input[type=range] { width:100%; -webkit-appearance:none; height:6px; background:var(--border); border-radius:3px; outline:none; }
input[type=range]::-webkit-slider-thumb { -webkit-appearance:none; width:18px; height:18px; border-radius:50%; background:linear-gradient(90deg, #00AAFE, #005CFB); cursor:pointer; border:2px solid #fff; }
input[type=range]::-moz-range-thumb { width:18px; height:18px; border-radius:50%; background:linear-gradient(90deg, #00AAFE, #005CFB); cursor:pointer; border:2px solid #fff; }

.calc-btn { width:100%; padding:12px; background:linear-gradient(90deg, #00AAFE, #005CFB); color:#fff; font-size:0.95rem; font-weight:700; border:none; border-radius:9px; cursor:pointer; transition:opacity .14s; font-family:'Inter',sans-serif; margin-top:4px; }
.calc-btn:hover { opacity:.88; }

/* ── Grade / Output Results Interface ── */
.results-section { display:none; margin-top:20px; }
.results-section.show { display:block; }
.grade-hero { background:linear-gradient(135deg, rgba(0,170,254,.15), rgba(0,92,251,.1)); border:1px solid rgba(0,170,254,.25); border-radius:12px; padding:22px 24px; margin-bottom:16px; display:grid; grid-template-columns:1fr 1fr; gap:16px; text-align:center; }
.hero-label { font-size:0.72rem; font-weight:700; color:#9ca3af; text-transform:uppercase; letter-spacing:.07em; margin-bottom:6px; }
.hero-val { font-size:2rem; font-weight:700; color:var(--heading); letter-spacing:-0.5px; }
.hero-sub { font-size:0.78rem; color:var(--textcolor); margin-top:4px; }
.result-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:10px; margin-bottom:16px; }
.rbox { background:var(--bg); border:1px solid var(--bg3); border-radius:9px; padding:12px 14px; }
.rbox-label { font-size:0.68rem; font-weight:700; color:#4b5563; text-transform:uppercase; letter-spacing:.06em; margin-bottom:4px; }
.rbox-val { font-size:1rem; font-weight:700; color:var(--input-color); }
.rbox-val.green { color:#22c55e; } .rbox-val.purple { color:#00AAFE; } .rbox-val.yellow { color:#facc15; }

.insight-list { list-style:none; padding:0; margin:0; display:flex; flex-direction:column; gap:8px; }
.insight-list li { background:var(--bg); border:1px solid var(--border); border-left:3px solid #00AAFE; border-radius:8px; padding:10px 14px; font-size:0.84rem; color:var(--input-color); line-height:1.5; }
.insight-list li.top { border-left-color:#22c55e; }

/* ── Content Blocks ── */
.blog-section { max-width:1200px; margin:0 auto; padding:0 16px 72px; }
.blog-section-header { display:flex; align-items:center; gap:12px; margin-bottom:28px; }
.blog-section-badge { font-size:0.68rem; font-weight:700; color:#00AAFE; text-transform:uppercase; letter-spacing:.1em; background:rgba(0,170,254,.1); border:1px solid rgba(0,170,254,.22); border-radius:20px; padding:4px 12px; }
.blog-section-title { font-size:1.2rem; font-weight:700; color:var(--heading); margin:0; }
.blog-intro { background:var(--bg2); border:1px solid var(--border); border-radius:12px; padding:22px 24px; margin-bottom:24px; font-size:0.9rem; color:#9ca3af; line-height:1.75; }
.blog-intro strong { color:var(--input-color); } .blog-intro p { margin:0 0 12px; } .blog-intro p:last-child { margin-bottom:0; }
.blog-grid { display:grid; grid-template-columns:1fr 1fr; gap:16px; margin-bottom:24px; }
.blog-card { background:var(--bg2); border:1px solid var(--border); border-radius:12px; padding:20px 22px; }
.blog-card-icon { width:36px; height:36px; border-radius:9px; background:rgba(0,170,254,.13); border:1px solid rgba(0,170,254,.2); display:flex; align-items:center; justify-content:center; font-size:17px; margin-bottom:13px; color:#00AAFE; }
.blog-card h3 { font-size:0.92rem; font-weight:700; color:var(--heading); margin:0 0 8px; }
.blog-card p { font-size:0.82rem; color:var(--textcolor); line-height:1.7; margin:0; }

/* ── Accordion FAQ Modules ── */
.faq-item { background:var(--bg2); border:1px solid var(--border); border-radius:10px; margin-bottom:8px; cursor:pointer; overflow:hidden; }
.faq-item:hover { border-color:var(--card-hover-border); }
.faq-q { display:flex; align-items:center; justify-content:space-between; padding:15px 18px; gap:12px; }
.faq-q-text { font-size:0.88rem; font-weight:600; color:var(--input-color); }
.faq-chevron { width:18px; height:18px; color:#00AAFE; flex-shrink:0; transition:transform .2s; }
.faq-item.open .faq-chevron { transform:rotate(180deg); }
.faq-a { max-height:0; overflow:hidden; transition:max-height .3s ease; }
.faq-a-inner { padding:0 18px 15px; font-size:0.84rem; color:var(--textcolor); line-height:1.75; border-top:1px solid var(--border); padding-top:13px; }
.faq-item.open .faq-a { max-height:400px; }
.faq-a-inner strong { color:#9ca3af; }

/* ── Utilities Sharing Elements ── */
.share-bar { max-width:1200px; margin:0 auto; padding:0 16px 48px; }
.share-inner { background:var(--bg2); border:1px solid var(--border); border-radius:12px; padding:20px 24px; display:flex; align-items:center; justify-content:space-between; gap:16px; flex-wrap:wrap; }
.share-heading { font-size:0.88rem; font-weight:700; color:var(--input-color); } .share-sub { font-size:0.76rem; color:var(--textcolor); }
.share-btns { display:flex; gap:8px; flex-wrap:wrap; }
.share-btn { display:inline-flex; align-items:center; gap:7px; padding:9px 16px; border-radius:8px; font-size:0.82rem; font-weight:700; text-decoration:none; border:none; cursor:pointer; transition:opacity .15s, transform .12s; white-space:nowrap; }
.share-btn:hover { opacity:.88; transform:translateY(-1px); }
.share-btn-tw { background:#000; color:#fff; } .share-btn-fb { background:#1877f2; color:#fff; } .share-btn-wa { background:#25d366; color:#fff; }
.share-btn svg { width:15px; height:15px; fill:currentColor; flex-shrink:0; }

/* ── Platform Footer Elements ── */
.site-footer { text-align:center; padding:24px 16px; font-size:0.8rem; color:#4b5563; border-top:1px solid var(--border); background:var(--bg); }
.footer-links { display:flex; justify-content:center; gap:20px; margin-top:8px; flex-wrap:wrap; }
.footer-links a { color:#4b5563; text-decoration:none; font-size:0.78rem; } .footer-links a:hover { color:#9ca3af; }

/* ── Grid Micro Responsive System ── */
@media (max-width:900px) { .page-wrap { grid-template-columns:1fr; } .sidebar { display:grid; grid-template-columns:1fr 1fr; gap:14px; } .blog-grid { grid-template-columns:1fr; } }
@media (max-width:700px) { .nav-links { display:none; } .hamburger { display:flex; } .page-wrap { padding:20px 14px 40px; } .grade-hero { grid-template-columns:1fr; } .result-grid { grid-template-columns:1fr 1fr; } .two-col { grid-template-columns:1fr; } }
@media (max-width:580px) { .sidebar { grid-template-columns:1fr; } .result-grid { grid-template-columns:1fr; } }