/* ============ Force visibility (no AOS) + pure-CSS reveal ============ */
[data-aos]{opacity:1 !important;transform:none !important}
@media (prefers-reduced-motion: no-preference){
  [data-aos]{opacity:0;transform:translateY(18px);transition:opacity .55s ease, transform .55s cubic-bezier(.2,.7,.2,1)}
  [data-aos].is-in{opacity:1;transform:none}
  [data-aos="zoom-in"]{transform:scale(.92)}
  [data-aos="zoom-in"].is-in{transform:scale(1)}
  [data-aos="fade-left"]{transform:translateX(28px)}
  [data-aos="fade-left"].is-in{transform:none}
}

/* ============ DESIGN TOKENS ============ */
:root{
  --ink:#0f172a; --ink-2:#1e293b; --muted:#64748b; --line:#e2e8f0; --line-2:#cbd5e1;
  --bg:#f6f8fb; --card:#ffffff;
  --brand:#059669; --brand-2:#10b981; --brand-d:#047857;
  --brand-grad:linear-gradient(135deg,#059669 0%,#0d9488 60%,#0891b2 100%);
  --accent:#f59e0b; --accent-d:#d97706;
  --warn:#b45309; --warn-bg:#fef3c7;
  --shadow-sm:0 1px 2px rgba(15,23,42,.05);
  --shadow:0 4px 6px -1px rgba(15,23,42,.07), 0 2px 4px -2px rgba(15,23,42,.05);
  --shadow-lg:0 14px 30px -10px rgba(15,23,42,.18), 0 6px 12px -8px rgba(15,23,42,.10);
  --shadow-xl:0 25px 50px -15px rgba(5,150,105,.25);
  --radius:14px; --radius-lg:22px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;background:var(--bg);color:var(--ink);font:16px/1.6 "Inter",-apple-system,BlinkMacSystemFont,sans-serif;-webkit-font-smoothing:antialiased}
/* Scoped — only inside our app/nav/footer so we don't break theme/plugin icons (e.g. back-to-top) */
.cye-app img,.cye-app svg,.nav svg,footer svg{display:block;max-width:100%}
a{color:var(--brand-d);text-decoration:none}
a:hover{color:var(--brand)}
button{font-family:inherit}

h1,h2,h3{letter-spacing:-.015em;color:var(--ink);line-height:1.15}
h1{font-size:clamp(2rem,4.4vw,3.4rem);font-weight:800;margin:0}
h2{font-size:clamp(1.5rem,3vw,2.1rem);font-weight:700;margin:0 0 .5em}
h3{font-size:1.15rem;font-weight:700;margin:0 0 .5em}

.container{max-width:1240px;margin:0 auto;padding:0 20px}

/* ============ NAV ============ */
.nav{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.85);backdrop-filter:saturate(180%) blur(14px);border-bottom:1px solid var(--line)}
.nav-inner{display:flex;align-items:center;gap:18px;padding:12px 0}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;color:var(--ink);font-size:1.05rem}
.brand .logo{width:34px;height:34px;border-radius:10px;background:var(--brand-grad);display:grid;place-items:center;color:#fff;box-shadow:var(--shadow)}
.brand .logo svg{stroke-width:2.5}
.navlinks{display:flex;gap:6px;flex:1;margin-left:14px;flex-wrap:wrap}
.navlinks a{padding:8px 12px;border-radius:8px;font-weight:500;color:var(--ink-2);font-size:.92rem;transition:.18s}
.navlinks a:hover{background:var(--bg);color:var(--brand-d)}
.nav .cta{background:var(--brand-grad);color:#fff;padding:9px 16px;border-radius:10px;font-weight:600;font-size:.9rem;box-shadow:0 6px 16px -4px rgba(5,150,105,.45);transition:transform .18s}
.nav .cta:hover{transform:translateY(-1px);color:#fff}
@media (max-width:780px){.navlinks{display:none}}

/* ============ HERO ============ */
.hero{padding:36px 0 16px;position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background:
  radial-gradient(900px 400px at 80% -10%, rgba(16,185,129,.18), transparent 60%),
  radial-gradient(700px 360px at 0% 20%, rgba(8,145,178,.14), transparent 60%);
  pointer-events:none}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center;position:relative}
@media (max-width:980px){.hero-grid{grid-template-columns:1fr;gap:24px}}
.eyebrow{display:inline-flex;align-items:center;gap:8px;background:rgba(16,185,129,.1);color:var(--brand-d);padding:6px 12px;border-radius:999px;font-size:.82rem;font-weight:600;margin-bottom:14px}
.eyebrow .dot{width:8px;height:8px;border-radius:50%;background:var(--brand);box-shadow:0 0 0 4px rgba(16,185,129,.25);animation:pulse 1.8s infinite}
@keyframes pulse{0%,100%{box-shadow:0 0 0 4px rgba(16,185,129,.25)}50%{box-shadow:0 0 0 8px rgba(16,185,129,0)}}
.hero h1 span.grad{background:var(--brand-grad);-webkit-background-clip:text;background-clip:text;color:transparent;display:inline-block}
.hero h1 .sub{display:block;font-size:.46em;font-weight:600;color:var(--muted);margin-top:10px;letter-spacing:-.005em}
.hero p.lede{font-size:1.12rem;color:var(--muted);max-width:54ch;margin:16px 0 18px}

/* H2 inside tool */
.tool-h2{font-size:1.35rem;font-weight:700;margin:0 0 4px;color:var(--ink)}
.tool-sub{margin:0 0 14px;color:var(--muted);font-size:.92rem}
.usp{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:18px}
.usp .chip{display:inline-flex;align-items:center;gap:6px;background:#fff;border:1px solid var(--line);padding:6px 12px;border-radius:999px;font-size:.82rem;font-weight:500;color:var(--ink-2);box-shadow:var(--shadow-sm)}
.usp .chip svg{color:var(--brand);width:14px;height:14px;stroke-width:3}
.hero-actions{display:flex;gap:10px;flex-wrap:wrap}
.btn-primary{display:inline-flex;align-items:center;gap:8px;background:var(--brand-grad);color:#fff;padding:12px 20px;border-radius:11px;font-weight:600;font-size:.95rem;border:0;cursor:pointer;box-shadow:0 8px 22px -6px rgba(5,150,105,.5);transition:transform .18s, box-shadow .18s}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 14px 30px -8px rgba(5,150,105,.6);color:#fff}
.btn-ghost{display:inline-flex;align-items:center;gap:8px;background:#fff;color:var(--ink);padding:12px 18px;border-radius:11px;font-weight:600;font-size:.95rem;border:1px solid var(--line);cursor:pointer;transition:.18s}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand-d)}

/* live stats counters under hero */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:26px}
@media (max-width:680px){.stats{grid-template-columns:repeat(2,1fr)}}
.stat{background:#fff;border:1px solid var(--line);border-radius:14px;padding:14px;box-shadow:var(--shadow-sm)}
.stat b{display:block;font-size:1.6rem;font-weight:800;color:var(--brand-d);font-family:"JetBrains Mono",monospace;line-height:1}
.stat span{font-size:.82rem;color:var(--muted);display:block;margin-top:4px}

/* hero illustration — isometric cube (clipped safely inside its column) */
.hero-vis{position:relative;height:430px;max-width:520px;margin-left:auto;margin-right:0;width:100%}
@media (max-width:980px){.hero-vis{margin:0 auto;height:380px}}
.hero-vis svg.iso{position:absolute;inset:0;margin:auto;width:min(340px,68%);height:auto;animation:floaty 6s ease-in-out infinite}
@keyframes floaty{0%,100%{transform:translateY(0)}50%{transform:translateY(-10px)}}
.float-badge{position:absolute;background:#fff;border:1px solid var(--line);border-radius:14px;padding:10px 12px;box-shadow:var(--shadow-lg);display:flex;align-items:center;gap:10px;animation:floaty 5s ease-in-out infinite;max-width:180px}
.float-badge .ico{width:36px;height:36px;border-radius:10px;display:grid;place-items:center;color:#fff;flex-shrink:0}
.float-badge b{display:block;font-size:.92rem;font-weight:700;white-space:nowrap}
.float-badge span{font-size:.75rem;color:var(--muted);white-space:nowrap}
.fb-1{top:2%;left:0;animation-delay:.4s}
.fb-1 .ico{background:linear-gradient(135deg,#f59e0b,#ef4444)}
.fb-2{bottom:8%;right:0;animation-delay:1.2s}
.fb-2 .ico{background:linear-gradient(135deg,#06b6d4,#3b82f6)}
.fb-3{top:46%;right:2%;animation-delay:.8s}
.fb-3 .ico{background:linear-gradient(135deg,#10b981,#0ea5e9)}
@media (max-width:560px){.float-badge{padding:8px 10px}.float-badge b{font-size:.85rem}.float-badge span{font-size:.7rem}.fb-1{top:0;left:-4px}.fb-2{bottom:0;right:-4px}.fb-3{top:42%;right:-4px}}

/* ============ TOOL SECTION ============ */
.tool-section{padding:30px 0 30px}
.tool-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:24px;align-items:flex-start}
@media (max-width:1080px){.tool-grid{grid-template-columns:1fr}}

.tool{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);padding:22px;position:relative;overflow:hidden}
.tool::before{content:"";position:absolute;inset:0 0 auto 0;height:4px;background:var(--brand-grad)}

.modes{display:flex;gap:4px;background:var(--bg);padding:4px;border-radius:12px;margin-bottom:18px}
.modes button{flex:1;border:0;background:transparent;padding:10px 12px;border-radius:9px;cursor:pointer;font-weight:600;color:var(--muted);font-size:.9rem;display:inline-flex;align-items:center;justify-content:center;gap:6px;transition:.18s}
.modes button.on{background:#fff;color:var(--ink);box-shadow:var(--shadow-sm)}
.modes button svg{width:16px;height:16px}

.field{display:flex;flex-direction:column;margin-bottom:12px}
.field label{font-size:.82rem;color:var(--muted);margin-bottom:5px;font-weight:500;display:flex;align-items:center;gap:6px}
.field .tip{cursor:help;background:var(--bg);color:var(--muted);border-radius:50%;width:16px;height:16px;display:inline-grid;place-items:center;font-size:.7rem;border:1px solid var(--line)}
.input, select{width:100%;padding:11px 13px;border:1px solid var(--line);border-radius:10px;font-size:.95rem;background:#fff;color:var(--ink);transition:.18s;font-family:inherit}
.input:focus, select:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 4px rgba(16,185,129,.15)}
.row{display:grid;gap:10px;grid-template-columns:1fr 130px}
.row.three{grid-template-columns:1fr 1fr 1fr}
@media (max-width:560px){.row, .row.three{grid-template-columns:1fr 1fr}}

.toggles{display:flex;flex-wrap:wrap;gap:6px;margin:6px 0 8px}
.toggles button{background:#fff;border:1.5px solid var(--line);border-radius:999px;padding:6px 12px;font-size:.82rem;cursor:pointer;color:var(--muted);font-weight:600;transition:.18s}
.toggles button:hover{border-color:var(--line-2)}
.toggles button.on{background:rgba(16,185,129,.1);border-color:var(--brand);color:var(--brand-d)}

.advanced{margin-top:10px;border-top:1px dashed var(--line);padding-top:14px}
.advanced summary{cursor:pointer;font-weight:600;color:var(--brand-d);font-size:.9rem;display:flex;align-items:center;gap:6px;list-style:none}
.advanced summary::-webkit-details-marker{display:none}
.advanced summary::before{content:"";width:0;height:0;border-left:5px solid var(--brand-d);border-top:4px solid transparent;border-bottom:4px solid transparent;transition:transform .18s}
.advanced[open] summary::before{transform:rotate(90deg)}

.actions{display:flex;gap:8px;align-items:end;margin-top:8px}
.actions .btn-primary{flex:1}

/* ============ PREVIEW + RESULTS PANEL ============ */
.preview-panel{display:flex;flex-direction:column;gap:14px;position:sticky;top:80px}
.preview-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:0;overflow:hidden;box-shadow:var(--shadow)}
.preview-vis{background:
  radial-gradient(600px 200px at 50% 0%, rgba(16,185,129,.12), transparent),
  linear-gradient(180deg,#f8fafc,#eef2f7);
  height:240px;display:grid;place-items:center;position:relative;border-bottom:1px solid var(--line)}
.preview-vis svg.shapeSvg{width:90%;max-width:300px;max-height:200px;transition:opacity .25s}
.preview-label{position:absolute;left:14px;top:14px;background:#fff;border:1px solid var(--line);border-radius:8px;padding:5px 10px;font-size:.74rem;font-weight:600;color:var(--muted);text-transform:uppercase;letter-spacing:.05em}
.preview-vol{position:absolute;right:14px;top:14px;font-family:"JetBrains Mono",monospace;font-size:.85rem;color:var(--brand-d);background:#fff;border:1px solid var(--line);border-radius:8px;padding:5px 10px;font-weight:700}

.result-main{padding:22px 22px 14px;background:linear-gradient(180deg,#fff, #f8fafc)}
.result-label{font-size:.78rem;color:var(--muted);font-weight:600;text-transform:uppercase;letter-spacing:.06em;margin-bottom:6px}
.result-num{display:flex;align-items:baseline;gap:10px;flex-wrap:wrap}
.result-num .num{font-size:3rem;font-weight:800;color:var(--ink);font-family:"JetBrains Mono",monospace;letter-spacing:-.02em;background:var(--brand-grad);-webkit-background-clip:text;background-clip:text;color:transparent;line-height:1}
.result-num .u{color:var(--muted);font-weight:600;font-size:1rem}

.kpi-grid{padding:14px 18px;display:grid;grid-template-columns:repeat(3,1fr);gap:8px;background:#fff;border-top:1px solid var(--line)}
@media (max-width:520px){.kpi-grid{grid-template-columns:repeat(2,1fr)}}
.kpi{padding:10px;background:var(--bg);border-radius:10px}
.kpi b{display:block;font-family:"JetBrains Mono",monospace;font-size:1.02rem;color:var(--ink);font-weight:700}
.kpi span{font-size:.72rem;color:var(--muted);margin-top:2px;display:block}

.cost-card{margin:14px 18px 18px;background:linear-gradient(135deg,#0f172a,#1e293b);color:#fff;border-radius:14px;padding:16px 18px;display:flex;justify-content:space-between;align-items:center;gap:10px;flex-wrap:wrap;position:relative;overflow:hidden}
.cost-card::after{content:"";position:absolute;width:200px;height:200px;border-radius:50%;background:radial-gradient(circle, rgba(16,185,129,.4), transparent 70%);right:-60px;top:-60px;pointer-events:none}
.cost-card .lab{font-size:.82rem;opacity:.7;font-weight:500}
.cost-card .lab small{display:block;font-size:.7rem;opacity:.7;margin-top:2px}
.cost-card b{font-size:1.7rem;font-weight:800;font-family:"JetBrains Mono",monospace;color:#fff;position:relative}

.warn{margin:0 18px 14px;background:var(--warn-bg);color:var(--warn);padding:10px 12px;border-radius:10px;font-size:.85rem;display:none;align-items:center;gap:8px;border:1px solid #fde68a}
.warn svg{flex-shrink:0;width:18px;height:18px}

.share{padding:0 18px 18px;display:flex;gap:6px;flex-wrap:wrap}
.share button{background:#fff;border:1px solid var(--line);border-radius:9px;padding:8px 12px;font-size:.82rem;cursor:pointer;font-weight:500;color:var(--ink-2);display:inline-flex;align-items:center;gap:6px;transition:.18s}
.share button:hover{border-color:var(--brand);color:var(--brand-d);background:rgba(16,185,129,.05)}
.share button svg{width:14px;height:14px;stroke-width:2.2}

/* number counter animation */
.num.flash{animation:flash .35s ease}
@keyframes flash{0%{transform:scale(1)}50%{transform:scale(1.04)}100%{transform:scale(1)}}

/* ============ SECTIONS ============ */
.section{padding:48px 0}
.section-head{text-align:center;margin-bottom:32px;max-width:680px;margin-left:auto;margin-right:auto}
.section-head .eyebrow{margin-bottom:10px}
.section-head p{color:var(--muted);font-size:1.05rem;margin:.4em 0 0}

/* ============ HOW BIG IS A CUBIC YARD — VISUAL ============ */
.scale-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
@media (max-width:880px){.scale-grid{grid-template-columns:repeat(2,1fr)}}
.scale-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:18px;text-align:center;box-shadow:var(--shadow-sm);transition:.25s;position:relative;overflow:hidden}
.scale-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:rgba(16,185,129,.4)}
.scale-card svg{height:90px;margin:0 auto 12px;color:var(--ink-2)}
.scale-card b{display:block;font-size:1.6rem;color:var(--brand-d);font-family:"JetBrains Mono",monospace;font-weight:800}
.scale-card span{display:block;color:var(--muted);font-size:.88rem;margin-top:2px}

/* ============ SHAPE GALLERY ============ */
.shape-gallery{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}
@media (max-width:1000px){.shape-gallery{grid-template-columns:repeat(3,1fr)}}
@media (max-width:560px){.shape-gallery{grid-template-columns:repeat(2,1fr)}}
.shape-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:20px 14px;text-align:center;cursor:pointer;transition:.22s;position:relative}
.shape-card:hover{transform:translateY(-3px);border-color:var(--brand);box-shadow:var(--shadow-lg)}
.shape-card .img{height:90px;display:grid;place-items:center;margin-bottom:8px}
.shape-card .img svg{height:80px;color:var(--ink-2);transition:.3s}
.shape-card:hover .img svg{color:var(--brand);transform:rotate(-4deg) scale(1.06)}
.shape-card b{display:block;font-size:.92rem;font-weight:700;color:var(--ink)}
.shape-card span{font-size:.74rem;color:var(--muted);font-family:"JetBrains Mono",monospace}

/* ============ MATERIAL BAR CHART ============ */
.density-table{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:8px;overflow:hidden;box-shadow:var(--shadow)}
.dens-row{display:grid;grid-template-columns:170px 1fr 90px 90px;gap:14px;align-items:center;padding:12px 14px;border-radius:10px;transition:.18s;position:relative}
@media (max-width:680px){.dens-row{grid-template-columns:120px 1fr 70px;gap:8px}.dens-row .col-waste{display:none}}
.dens-row:hover{background:var(--bg)}
.dens-mat{display:flex;align-items:center;gap:10px;font-weight:600;font-size:.94rem}
.dens-mat .swatch{width:34px;height:34px;border-radius:9px;display:grid;place-items:center;color:#fff;font-size:1.1rem;font-weight:700;flex-shrink:0}
.dens-bar{height:10px;background:var(--bg);border-radius:999px;overflow:hidden;position:relative}
.dens-bar .fill{height:100%;border-radius:999px;background:var(--brand-grad);width:0;animation:growbar 1.5s ease-out forwards}
@keyframes growbar{from{width:0}}
.dens-row b{font-family:"JetBrains Mono",monospace;color:var(--ink);font-size:.92rem;text-align:right}
.dens-row .col-waste{font-size:.82rem;color:var(--muted);text-align:right}

/* swatch colors per material */
.sw-concrete{background:linear-gradient(135deg,#94a3b8,#475569)}
.sw-topsoil{background:linear-gradient(135deg,#92400e,#451a03)}
.sw-mulch{background:linear-gradient(135deg,#a16207,#713f12)}
.sw-gravel{background:linear-gradient(135deg,#78716c,#44403c)}
.sw-pea{background:linear-gradient(135deg,#d4d4d8,#a1a1aa)}
.sw-crushed{background:linear-gradient(135deg,#a8a29e,#57534e)}
.sw-sand{background:linear-gradient(135deg,#fcd34d,#d97706)}
.sw-fill{background:linear-gradient(135deg,#854d0e,#3f2706)}
.sw-compost{background:linear-gradient(135deg,#65a30d,#365314)}
.sw-decor{background:linear-gradient(135deg,#cbd5e1,#64748b)}
.sw-asphalt{background:linear-gradient(135deg,#1e293b,#020617)}
.sw-limestone{background:linear-gradient(135deg,#e7e5e4,#a8a29e);color:#44403c}
.sw-riprap{background:linear-gradient(135deg,#525b6c,#1e293b)}

/* ============ EXAMPLES — RECIPE CARDS ============ */
.examples-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
@media (max-width:980px){.examples-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:600px){.examples-grid{grid-template-columns:1fr}}
.ex-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.25s;box-shadow:var(--shadow-sm);display:flex;flex-direction:column}
.ex-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg)}
.ex-img{height:140px;background:var(--brand-grad);display:grid;place-items:center;position:relative;overflow:hidden}
.ex-img svg{width:90px;color:#fff;opacity:.85}
.ex-img::after{content:"";position:absolute;inset:0;background:radial-gradient(circle at 30% 30%, rgba(255,255,255,.25), transparent 60%)}
.ex-num{position:absolute;top:10px;left:12px;background:rgba(0,0,0,.25);color:#fff;border-radius:50%;width:28px;height:28px;display:grid;place-items:center;font-weight:700;font-size:.88rem;backdrop-filter:blur(8px)}
.ex-body{padding:16px;flex:1;display:flex;flex-direction:column}
.ex-body h3{margin:0 0 8px;font-size:1rem}
.ex-body p{margin:0;color:var(--muted);font-size:.88rem;flex:1}
.ex-result{margin-top:10px;padding:10px 12px;background:var(--bg);border-radius:10px;display:flex;justify-content:space-between;align-items:center;font-size:.85rem}
.ex-result b{font-family:"JetBrains Mono",monospace;color:var(--brand-d);font-size:1rem}
.ex-tags{display:flex;gap:6px;margin-top:10px;flex-wrap:wrap}
.ex-tags a{background:rgba(16,185,129,.1);color:var(--brand-d);padding:3px 9px;border-radius:999px;font-size:.74rem;font-weight:600}

/* ============ INTERNAL LINK — BENTO GRID ============ */
.bento{display:grid;grid-template-columns:repeat(12,1fr);gap:14px}
@media (max-width:900px){.bento{grid-template-columns:repeat(6,1fr)}}
.bento-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:22px;transition:.25s;position:relative;overflow:hidden}
.bento-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);border-color:rgba(16,185,129,.4)}
.bento-card .head{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.bento-card .head .ic{width:42px;height:42px;border-radius:11px;display:grid;place-items:center;color:#fff;flex-shrink:0}
.bento-card .head .ic svg{width:22px;height:22px;stroke-width:2.2}
.bento-card .head h3{margin:0;font-size:1.05rem}
.bento-card .head p{margin:0;font-size:.78rem;color:var(--muted)}
.b-mat .ic{background:linear-gradient(135deg,#f59e0b,#d97706)}
.b-shape .ic{background:linear-gradient(135deg,#06b6d4,#0891b2)}
.b-proj .ic{background:linear-gradient(135deg,#10b981,#059669)}
.b-conv .ic{background:linear-gradient(135deg,#8b5cf6,#6d28d9)}
.b-grav .ic{background:linear-gradient(135deg,#64748b,#334155)}
.b-guide .ic{background:linear-gradient(135deg,#ef4444,#b91c1c)}
.b-links{display:flex;flex-wrap:wrap;gap:6px}
.b-links a{padding:7px 12px;background:var(--bg);border:1px solid var(--line);border-radius:8px;font-size:.85rem;color:var(--ink-2);font-weight:500;transition:.18s}
.b-links a:hover{background:#fff;border-color:var(--brand);color:var(--brand-d);transform:translateY(-1px)}
.bento .span6{grid-column:span 6}
.bento .span4{grid-column:span 4}
.bento .span12{grid-column:span 12}
@media (max-width:900px){.bento .span6,.bento .span4,.bento .span12{grid-column:span 6}}

/* ============ TRUCK CAPACITY VISUAL ============ */
.truck-list{display:flex;flex-direction:column;gap:10px}
.truck-row{background:#fff;border:1px solid var(--line);border-radius:14px;padding:14px 18px;display:grid;grid-template-columns:60px 1fr 110px;gap:14px;align-items:center;box-shadow:var(--shadow-sm)}
.truck-row svg{width:54px;height:36px;color:var(--ink-2)}
.truck-row b{display:block;font-weight:700}
.truck-row p{margin:0;color:var(--muted);font-size:.85rem}
.truck-cap{font-family:"JetBrains Mono",monospace;font-weight:700;color:var(--brand-d);text-align:right}

/* ============ HOW IT'S CALCULATED — formula breakdown ============ */
.formula-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow);padding:30px;max-width:900px;margin:0 auto;position:relative;overflow:hidden}
.formula-card::before{content:"";position:absolute;inset:0 0 auto 0;height:4px;background:var(--brand-grad)}
.formula-meta{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:10px;margin-bottom:20px;padding-bottom:18px;border-bottom:1px dashed var(--line)}
.formula-meta .lab{font-size:.78rem;color:var(--muted);text-transform:uppercase;letter-spacing:.06em;font-weight:600}
.formula-meta .shape-name{font-size:1.4rem;font-weight:700;color:var(--ink);display:flex;align-items:center;gap:10px}
.formula-meta .shape-name svg{width:32px;height:32px;color:var(--brand)}
.formula-meta .live-vals{background:rgba(16,185,129,.1);color:var(--brand-d);padding:6px 12px;border-radius:999px;font-size:.82rem;font-weight:600;font-family:"JetBrains Mono",monospace}
.steps{display:flex;flex-direction:column;gap:14px}
.step{display:grid;grid-template-columns:42px 1fr;gap:14px;align-items:start;padding:14px 16px;background:var(--bg);border-radius:12px;border:1px solid var(--line);position:relative;transition:.18s}
.step:hover{border-color:rgba(16,185,129,.4);background:#fff}
.step .n{width:32px;height:32px;border-radius:10px;background:var(--brand-grad);color:#fff;display:grid;place-items:center;font-weight:700;font-size:.92rem;box-shadow:0 4px 10px -2px rgba(5,150,105,.4)}
.step .body h3{margin:0 0 4px;font-size:.92rem;font-weight:700;color:var(--ink)}
.step .body p{margin:0;font-size:.86rem;color:var(--muted);line-height:1.5}
.step .eq{margin-top:8px;padding:10px 14px;background:#0f172a;color:#a7f3d0;border-radius:8px;font-family:"JetBrains Mono",monospace;font-size:.92rem;font-weight:600;overflow-x:auto;white-space:nowrap;-webkit-overflow-scrolling:touch}
.step .eq::-webkit-scrollbar{height:6px}
.step .eq::-webkit-scrollbar-thumb{background:#334155;border-radius:3px}

/* Mobile: let equations WRAP instead of horizontal-scroll, and shrink formula card padding */
@media (max-width:680px){
  .formula-card{padding:18px 14px;border-radius:14px}
  .formula-meta{margin-bottom:14px;padding-bottom:12px}
  .formula-meta .shape-name{font-size:1.1rem}
  .formula-meta .live-vals{font-size:.74rem;padding:5px 9px;word-break:break-word;white-space:normal;line-height:1.4}
  .step{grid-template-columns:32px 1fr;gap:10px;padding:12px}
  .step .n{width:26px;height:26px;font-size:.82rem}
  .step .body h3{font-size:.88rem}
  .step .body p{font-size:.8rem}
  .step .eq{font-size:.78rem;padding:9px 11px;white-space:normal;word-break:break-word;overflow-x:visible;line-height:1.55}
  .step.final .eq{font-size:.92rem}
}
.step .eq .v{color:#fde68a}
.step .eq .res{color:#34d399;font-weight:800}
.step.final .eq{background:linear-gradient(135deg,#047857,#0f766e);color:#fff;font-size:1.05rem}
.step.final .eq .res{color:#fef3c7}

/* ============ LATEST BLOG ============ */
.blog-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
@media (max-width:980px){.blog-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:600px){.blog-grid{grid-template-columns:1fr}}
.blog-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm);transition:.25s;display:flex;flex-direction:column;text-decoration:none;color:inherit}
.blog-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:rgba(16,185,129,.4);text-decoration:none;color:inherit}
.blog-thumb{aspect-ratio:16/9;background:linear-gradient(135deg,#a7f3d0,#0f766e);position:relative;overflow:hidden}
.blog-thumb svg{position:absolute;inset:0;width:100%;height:100%;opacity:.85}
.blog-cat{position:absolute;top:12px;left:12px;background:rgba(15,23,42,.85);color:#fff;font-size:.7rem;font-weight:700;padding:4px 10px;border-radius:999px;letter-spacing:.04em;text-transform:uppercase;backdrop-filter:blur(8px)}
.blog-body{padding:18px;flex:1;display:flex;flex-direction:column}
.blog-body h3{margin:0 0 8px;font-size:1.02rem;line-height:1.35;color:var(--ink)}
.blog-card:hover .blog-body h3{color:var(--brand-d)}
.blog-body p{margin:0;color:var(--muted);font-size:.86rem;flex:1}
.blog-meta{display:flex;justify-content:space-between;align-items:center;margin-top:12px;padding-top:12px;border-top:1px solid var(--line);font-size:.78rem;color:var(--muted)}
.blog-meta .read{color:var(--brand-d);font-weight:600;display:inline-flex;align-items:center;gap:4px}
.blog-more{text-align:center;margin-top:28px}
.blog-more .btn-primary{padding:13px 26px;font-size:1rem}

/* ============ FAQ ============ */
.faq-list{display:flex;flex-direction:column;gap:10px;max-width:880px;margin:0 auto}
.faq-list details{background:#fff;border:1px solid var(--line);border-radius:14px;padding:0;transition:.2s;overflow:hidden}
.faq-list details[open]{border-color:rgba(16,185,129,.5);box-shadow:var(--shadow)}
.faq-list summary{padding:16px 20px;font-weight:600;color:var(--ink);font-size:1rem;cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:10px;list-style:none}
.faq-list summary::-webkit-details-marker{display:none}
.faq-list summary::after{content:"+";font-size:1.4rem;color:var(--muted);font-weight:300;transition:.2s;flex-shrink:0}
.faq-list details[open] summary::after{transform:rotate(45deg);color:var(--brand-d)}
.faq-list details p{margin:0;padding:0 20px 18px;color:var(--muted);font-size:.95rem;line-height:1.65}

/* ============ CTA BANNER ============ */
.cta-banner{background:linear-gradient(135deg,#0f172a 0%, #064e3b 100%);color:#fff;border-radius:24px;padding:42px;display:grid;grid-template-columns:1fr auto;gap:24px;align-items:center;position:relative;overflow:hidden}
.cta-banner::before{content:"";position:absolute;width:500px;height:500px;border-radius:50%;background:radial-gradient(circle, rgba(16,185,129,.3), transparent 65%);right:-150px;top:-200px}
.cta-banner h2{color:#fff;margin:0}
.cta-banner p{color:rgba(255,255,255,.7);margin:8px 0 0;max-width:50ch}
.cta-banner .btn-primary{background:#fff;color:var(--brand-d);box-shadow:none}
.cta-banner .btn-primary:hover{background:#f0fdf4}
@media (max-width:720px){.cta-banner{grid-template-columns:1fr;padding:28px}}

/* ============ FOOTER ============ */
footer{background:#0b1220;color:#94a3b8;padding:48px 0 20px;margin-top:48px}
footer a{color:#cbd5e1}
footer a:hover{color:#fff}
.foot-grid{display:grid;grid-template-columns:1.4fr repeat(4,1fr);gap:32px}
@media (max-width:880px){.foot-grid{grid-template-columns:1fr 1fr}}
.foot-grid h4{color:#fff;font-size:.92rem;margin:0 0 12px;letter-spacing:.04em;text-transform:uppercase}
.foot-grid ul{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:8px;font-size:.9rem}
.foot-brand p{font-size:.88rem;line-height:1.7;max-width:36ch;color:#94a3b8;margin:14px 0 0}
.foot-copy{border-top:1px solid #1e293b;padding-top:18px;margin-top:32px;font-size:.82rem;color:#64748b;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}

/* ============ MOBILE SHEET behavior for tool ============ */
@media (max-width:780px){
  .preview-panel{position:static}
  .modes button span{display:none}
  .modes button svg{margin:0}
}

/* tooltip popovers */
[data-tip]{position:relative}
[data-tip]:hover::after{content:attr(data-tip);position:absolute;bottom:calc(100% + 6px);left:50%;transform:translateX(-50%);background:#0f172a;color:#fff;padding:6px 10px;border-radius:6px;font-size:.78rem;white-space:nowrap;z-index:50;pointer-events:none}

/* skip link */
.skip{position:absolute;left:-9999px;top:0}
.skip:focus{position:fixed;left:12px;top:12px;background:#000;color:#fff;padding:10px 14px;border-radius:8px;z-index:100}

/* ============ SCHEMA section header ============ */
.crumb{font-size:.85rem;color:var(--muted);margin:6px 0 28px;display:flex;align-items:center;gap:6px}
.crumb a{color:var(--muted)}
.crumb a:hover{color:var(--brand-d)}
.crumb svg{width:14px;height:14px}

.dark-section{background:#0f172a;color:#e2e8f0;padding:60px 0;margin-top:30px;border-radius:32px 32px 0 0}
.dark-section h2{color:#fff}
.dark-section .section-head p{color:rgba(226,232,240,.7)}
.dark-section .eyebrow{background:rgba(16,185,129,.18);color:#34d399}
.dark-section .truck-row{background:#1e293b;border-color:#334155;color:#e2e8f0}
.dark-section .truck-row svg{color:#cbd5e1}
.dark-section .truck-row p{color:#94a3b8}
.dark-section .truck-cap{color:#34d399}

/* ===================================================================
   CONCRETE TEMPLATE — additions (reuse by any concrete-style tool)
   =================================================================== */

/* PSI selector pills */
.psi-pills{display:grid;grid-template-columns:repeat(5,1fr);gap:8px;margin:8px 0}
@media (max-width:680px){.psi-pills{grid-template-columns:repeat(2,1fr)}}
.psi-pill{background:#fff;border:1.5px solid var(--line);border-radius:12px;padding:14px 10px;cursor:pointer;text-align:center;transition:.18s}
.psi-pill:hover{border-color:var(--line-2)}
.psi-pill.on{background:linear-gradient(135deg,#fff7ed,#fed7aa);border-color:var(--accent);color:var(--accent-d);box-shadow:0 4px 12px -4px rgba(245,158,11,.35)}
.psi-pill b{display:block;font-family:"JetBrains Mono",monospace;font-size:1.05rem;color:var(--ink)}
.psi-pill.on b{color:var(--accent-d)}
.psi-pill span{display:block;font-size:.72rem;color:var(--muted);margin-top:2px;line-height:1.3}

/* Bag comparison cards */
.bags-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:16px}
@media (max-width:680px){.bags-grid{grid-template-columns:1fr}}
.bag-card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px;text-align:center;position:relative;overflow:hidden;transition:.22s}
.bag-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);border-color:rgba(245,158,11,.4)}
.bag-card::before{content:"";position:absolute;inset:0 0 auto 0;height:4px;background:linear-gradient(90deg,#f59e0b,#d97706)}
.bag-card .icn{font-size:2.2rem;line-height:1;margin-bottom:6px}
.bag-card b{display:block;font-size:.95rem;font-weight:700;color:var(--ink)}
.bag-card .yield{margin:8px 0 6px;font-family:"JetBrains Mono",monospace;font-size:1.25rem;color:var(--brand-d);font-weight:800}
.bag-card .needed{padding:8px 12px;background:var(--brand-l);border-radius:8px;color:var(--brand-d);font-family:"JetBrains Mono",monospace;font-weight:700;font-size:1rem;margin-top:10px}
.bag-card .needed small{font-size:.7rem;color:var(--muted);font-weight:500;display:block;margin-top:2px}

/* Mix ratio visualization */
.mix-vis{display:grid;grid-template-columns:1fr 2fr 3fr;gap:6px;margin:18px 0;height:72px;border-radius:14px;overflow:hidden;border:1px solid var(--line)}
.mix-vis div{display:grid;place-items:center;color:#fff;font-weight:700;font-family:"JetBrains Mono",monospace;font-size:.85rem;text-align:center;padding:8px}
.mix-vis div b{display:block;font-size:1.15rem}
.mix-vis .m-cement{background:linear-gradient(135deg,#475569,#1e293b)}
.mix-vis .m-sand{background:linear-gradient(135deg,#fcd34d,#d97706)}
.mix-vis .m-gravel{background:linear-gradient(135deg,#78716c,#1c1917)}

/* Bags vs ready-mix breakeven banner */
.breakeven{background:linear-gradient(135deg,#fef3c7,#fde68a);border:1px solid #f59e0b;border-radius:14px;padding:16px 20px;display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin:20px 0}
.breakeven .b-ic{width:44px;height:44px;border-radius:12px;background:linear-gradient(135deg,#f59e0b,#d97706);color:#fff;display:grid;place-items:center;flex-shrink:0}
.breakeven .b-body{flex:1;min-width:200px}
.breakeven b{display:block;color:#78350f;font-size:1rem}
.breakeven span{font-size:.88rem;color:#92400e}

/* ===================================================================
   SUBTOOL — slim layout for sub-tool pages (not homepage).
   Reused by /materials/concrete/, /materials/gravel/, etc.
   =================================================================== */
.subtool-hero{padding:18px 0 6px;position:relative}
.subtool-hero h1{font-size:clamp(1.55rem,3.3vw,2.3rem);line-height:1.2;margin:6px 0 6px}
.subtool-hero h1 .sub{display:block;font-size:.5em;font-weight:600;color:var(--muted);margin-top:8px;letter-spacing:-.005em}
.subtool-hero .lede{font-size:1.02rem;color:var(--muted);max-width:62ch;margin:10px 0 14px}

/* Inline ready-mix truck list — light bg variant of .truck-row */
.subtool-trucks{display:flex;flex-direction:column;gap:10px;max-width:780px;margin:0 auto}
.subtool-trucks .truck-row{background:#fff;border:1px solid var(--line);color:var(--ink);box-shadow:var(--shadow-sm)}
.subtool-trucks .truck-row svg{color:var(--ink-2)}
.subtool-trucks .truck-row p{color:var(--muted)}
.subtool-trucks .truck-cap{color:var(--brand-d)}

/* 2-col examples grid (instead of 3-col homepage default) */
.examples-grid.subtool-2col{grid-template-columns:repeat(2,1fr)}
@media (max-width:760px){.examples-grid.subtool-2col{grid-template-columns:1fr}}

/* Flat related-calculators block (replaces big bento on subtool pages) */
.subtool-related{background:var(--card);border:1px solid var(--line);border-radius:var(--radius-lg);padding:26px;margin:18px 0;box-shadow:var(--shadow-sm)}
.subtool-related-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
@media (max-width:900px){.subtool-related-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:520px){.subtool-related-grid{grid-template-columns:1fr}}
.subtool-related-group h3{font-size:.74rem;color:var(--muted);text-transform:uppercase;letter-spacing:.08em;font-weight:700;margin:0 0 10px}
.subtool-related-group ul{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:7px}
.subtool-related-group ul li a{font-size:.92rem;color:var(--ink-2);font-weight:500;display:inline-flex;align-items:center;gap:6px;transition:.18s}
.subtool-related-group ul li a:hover{color:var(--brand-d);transform:translateX(2px)}

/* Slim blog grid (3 cards on subtool) */
.blog-grid.subtool-3{grid-template-columns:repeat(3,1fr)}
@media (max-width:900px){.blog-grid.subtool-3{grid-template-columns:repeat(2,1fr)}}
@media (max-width:580px){.blog-grid.subtool-3{grid-template-columns:1fr}}

/* Small inline embed CTA (replaces homepage banner) */
.subtool-embed-inline{background:#fef3c7;border:1px dashed #f59e0b;border-radius:12px;padding:13px 18px;display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin:20px 0;max-width:760px}
.subtool-embed-inline > svg{color:#b45309;width:22px;height:22px;flex-shrink:0}
.subtool-embed-inline .body{flex:1;min-width:200px;font-size:.92rem;color:#78350f}
.subtool-embed-inline .body b{color:#451a03}
.subtool-embed-inline button{background:#0f172a;color:#fff;border:0;padding:9px 16px;border-radius:9px;font-weight:600;cursor:pointer;font-size:.88rem;display:inline-flex;align-items:center;gap:6px}
.subtool-embed-inline button:hover{background:var(--brand-d)}

/* Combined PSI + thickness table */
.thickness-table th:nth-child(1){width:32%}
.thickness-table .psi{font-family:"JetBrains Mono",monospace;font-weight:700;color:var(--accent-d)}
.thickness-table .thick{font-family:"JetBrains Mono",monospace;font-weight:700;color:var(--brand-d)}

/* Subtitle below H1 (separate from H1 so Google reads clean H1 only) */
.subtool-tagline{font-size:1.05rem;font-weight:600;color:var(--muted);margin:6px 0 14px;line-height:1.4;max-width:62ch}

/* ===================================================================
   GRAVEL — sub-type hub cards (used by /materials/gravel/)
   This page is dual-role: tool + mini-pillar hub to 10 sub-pillar pages.
   The .gravel-types-grid section is the main visual hub.
   =================================================================== */
.gravel-types-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:14px;margin:18px 0}
@media (max-width:1080px){.gravel-types-grid{grid-template-columns:repeat(3,1fr)}}
@media (max-width:680px){.gravel-types-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:420px){.gravel-types-grid{grid-template-columns:1fr}}

.gtype-card{background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden;transition:.22s;display:flex;flex-direction:column;text-decoration:none;color:inherit;box-shadow:var(--shadow-sm);position:relative}
.gtype-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);border-color:rgba(16,185,129,.4);text-decoration:none;color:inherit}
.gtype-card .gimg{height:96px;background:linear-gradient(180deg,#f8fafc,#eef2f7);border-bottom:1px solid var(--line);display:grid;place-items:center;position:relative}
.gtype-card .gimg svg{width:74px;height:auto}
.gtype-card .gbody{padding:13px 14px;display:flex;flex-direction:column;flex:1}
.gtype-card h3{margin:0 0 4px;font-size:.96rem;line-height:1.25}
.gtype-card .gtype-density{font-family:"JetBrains Mono",monospace;font-size:.78rem;color:var(--brand-d);font-weight:700;margin-bottom:4px}
.gtype-card .gtype-use{font-size:.78rem;color:var(--muted);line-height:1.4;flex:1;margin:0 0 8px}
.gtype-card .gtype-cta{font-size:.78rem;color:var(--brand-d);font-weight:600;display:inline-flex;align-items:center;gap:4px;border-top:1px dashed var(--line);padding-top:8px;margin-top:auto}
.gtype-card:hover .gtype-cta{gap:8px}

/* Density table with sub-pillar links inline */
.density-link-table{width:100%;border-collapse:collapse;font-size:.92rem;background:#fff;border-radius:14px;overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow-sm)}
.density-link-table th,.density-link-table td{padding:10px 12px;border-bottom:1px solid var(--line);text-align:left}
.density-link-table tbody tr:last-child td{border-bottom:0}
.density-link-table tbody tr:hover{background:var(--bg)}
.density-link-table th{background:#f8fafc;font-size:.78rem;text-transform:uppercase;letter-spacing:.05em;color:var(--muted);font-weight:700}
.density-link-table td a{color:var(--brand-d);font-weight:600}
.density-link-table .density{font-family:"JetBrains Mono",monospace;color:var(--ink);font-weight:700;text-align:right}

/* Sub-type CTA inside tool result panel */
.subtype-cta{background:linear-gradient(135deg,#ecfdf5,#d1fae5);border:1px solid #10b981;border-radius:10px;padding:10px 14px;margin:12px 18px 0;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:8px;font-size:.85rem}
.subtype-cta b{color:var(--brand-d);font-weight:700}
.subtype-cta a{background:#fff;border:1px solid var(--brand);color:var(--brand-d);padding:5px 10px;border-radius:8px;font-weight:600;font-size:.82rem;text-decoration:none;display:inline-flex;align-items:center;gap:4px}
.subtype-cta a:hover{background:var(--brand);color:#fff}

/* Project preset chips */
.project-presets{display:flex;flex-wrap:wrap;gap:6px;margin:8px 0 4px}
.project-presets button{background:#fff;border:1.5px solid var(--line);border-radius:999px;padding:6px 12px;font-size:.8rem;cursor:pointer;color:var(--muted);font-weight:600;transition:.18s;display:inline-flex;align-items:center;gap:5px}
.project-presets button:hover{border-color:var(--line-2)}
.project-presets button.on{background:linear-gradient(135deg,#ecfdf5,#d1fae5);border-color:var(--brand);color:var(--brand-d)}
.project-presets button svg{width:13px;height:13px}