/* Site kabuğu, ana sayfa ve rulman aracına özel stiller. Temel tokenlar base.css'te. */
[hidden] { display: none !important; }

/* Üst bar */
.site-header { position: sticky; top: 0; z-index: 10; background: var(--bar); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.site-bar { max-width: 1180px; margin: 0 auto; padding: 12px 16px; display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.site-brand { display: flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; font: 600 20.5px/1 var(--font-head); }
.site-logo { width: 36px; height: 36px; animation: spin 16s linear infinite; }
.nav { display: flex; gap: 4px; flex-wrap: wrap; }
.nav a { color: var(--muted); text-decoration: none; font-weight: 800; padding: 8px 9px; border-radius: 999px; }
.nav a:hover { color: var(--ink); background: var(--field); }
.nav a.active { color: var(--accent); background: var(--accent-soft); }
.nav a:focus-visible, .site-brand:focus-visible { outline: 3px solid var(--accent-soft); outline-offset: 2px; border-radius: 999px; }

.site-main { max-width: 1180px; margin: 0 auto; padding: 8px 16px 32px; }
.side { top: 88px; }
.mesh-box { min-width: 0; }

/* Ana sayfa */
.home-hero { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); gap: 28px; align-items: center; padding: 28px 0 8px; }
.eyebrow { margin: 0 0 8px; color: var(--accent); font-weight: 800; font-size: 15px; letter-spacing: 0.08em; text-transform: uppercase; }
.home-hero h1 { font-size: 46px; line-height: 1.1; letter-spacing: -0.02em; margin-bottom: 12px; text-wrap: balance; }
.lead { margin: 0 0 20px; font-size: 19.5px; color: var(--muted); max-width: 52ch; }
.hero-cta { display: flex; gap: 10px; flex-wrap: wrap; }
a.btn { display: inline-flex; text-decoration: none; }
.hero-art { display: flex; justify-content: center; }
.hero-art svg { width: min(340px, 100%); height: auto; }
.section-title { font: 600 26px var(--font-head); margin: 36px 0 14px; }
.tools { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 16px; }
.tool-card { display: block; background: var(--surface); border-radius: var(--r); box-shadow: var(--shadow); padding: 20px; color: var(--ink); text-decoration: none; transition: transform 0.15s, box-shadow 0.15s; }
a.tool-card:hover { transform: translateY(-3px); box-shadow: 0 14px 30px rgba(30, 37, 68, 0.12); }
a.tool-card:focus-visible { outline: 3px solid var(--accent-soft); outline-offset: 3px; }
.tool-card h3 { font: 600 20.5px var(--font-head); margin: 10px 0 6px; }
.tool-card p { margin: 0; color: var(--muted); font-size: 16px; }
.tool-card.soon { opacity: 0.6; }
.tool-tag { display: inline-block; font-size: 14px; font-weight: 800; padding: 4px 10px; border-radius: 999px; background: var(--line); color: var(--muted); }
.tool-tag.ok { background: var(--ok-soft); color: var(--ok); }

/* Hakkında ve alt bilgi */
.about { max-width: 70ch; }
.about h2 { font: 600 24px var(--font-head); margin: 0 0 10px; }
.about p { color: var(--muted); margin: 0 0 12px; }
.site-footer { max-width: 1180px; margin: 0 auto; padding: 20px 16px 36px; border-top: 1px solid var(--line); color: var(--muted); font-size: 15px; }

/* Rulman aracı */
.pchips { display: flex; flex-wrap: wrap; gap: 8px; }
.pbtn { font: 700 15px/1 var(--font-body); background: var(--accent-soft); color: var(--accent); border: 0; border-radius: 999px; padding: 9px 13px; cursor: pointer; transition: transform 0.15s; }
.pbtn:hover { transform: translateY(-2px); }
.gval { fill: var(--ink); font: 600 28px var(--font-head); }
.gsub { fill: var(--muted); font: 700 14px var(--font-body); }
.kpi { background: var(--accent-soft); border-radius: 14px; padding: 10px 12px; min-width: 0; }
.kpi span { font-size: 14.5px; color: var(--muted); font-weight: 700; }
.kpi b { display: block; font: 600 20.5px/1.2 var(--font-num); font-variant-numeric: tabular-nums; overflow-wrap: anywhere; }
.bd-outer { fill: #cfd9ee; stroke: var(--ink); stroke-width: 1.5; }
.bd-cavity { fill: var(--surface2); }
.bd-inner { fill: #9fb3d9; stroke: var(--ink); stroke-width: 1.5; }
.bd-bore { fill: var(--field); stroke: var(--ink); stroke-width: 1.2; }
.bd-spoke { fill: var(--ink); }
.bd-ball { fill: var(--teal); stroke: #0b6e62; stroke-width: 1.2; }
.bd-ball.roller { fill: var(--amber); stroke: #9a6410; }
.bd-arrow { stroke: var(--bad); stroke-width: 3; fill: none; }
.bd-head { fill: var(--bad); }
.bd-axial { fill: var(--accent-soft); stroke: var(--accent); stroke-width: 2; }
.bd-axial-dot { fill: var(--accent); }
.bd-lbl { fill: var(--ink); font: 800 16px var(--font-body); }
.bars { display: grid; gap: 4px; }
.bar-row { display: grid; grid-template-columns: 52px minmax(0, 1fr) 118px; gap: 12px; align-items: center; padding: 6px 0; }
.bar-row span { font-weight: 800; color: var(--muted); font-size: 16px; }
.bar-row b { font: 600 15px var(--font-num); text-align: right; font-variant-numeric: tabular-nums; }
.bar-track { position: relative; height: 14px; background: var(--line); border-radius: 999px; }
.bar-fill { height: 100%; background: var(--accent); border-radius: 999px; transition: width 0.4s ease; }
.bar-row.sel .bar-fill { background: var(--teal); }
.bar-target { position: absolute; top: -4px; bottom: -4px; width: 3px; margin-left: -1px; background: var(--amber); border-radius: 2px; }
.bar-legend { font-size: 14.5px; color: var(--muted); margin-top: 8px; }

@media (max-width: 860px) {
  .home-hero { grid-template-columns: minmax(0, 1fr); }
  .home-hero h1 { font-size: 36px; }
  .hero-art { order: -1; }
  .hero-art svg { width: min(240px, 100%); }
}
@media (max-width: 560px) {
  .bar-row { grid-template-columns: 44px minmax(0, 1fr) 96px; }
}

/* Geniş seçim alanları: rulman tipi ve dönen halka */
.field.wide label { display: block; font-weight: 800; }
.field.wide small { display: block; color: var(--muted); font-size: 14.5px; font-weight: 600; margin-top: 2px; }
.field.wide .num { width: 100%; margin-top: 8px; }
.field.wide .num select { width: 100%; text-align: left; }

/* Mekanik araçlar ve formül bağlantıları */
.bar-row.long { grid-template-columns: 150px minmax(0, 1fr) 64px; }
.bar-row.long span { white-space: normal; line-height: 1.25; }
.formula-link { margin: 14px 2px 0; font-weight: 800; }
.formula-link a { color: var(--accent); }
.view section[id^="f-"] { scroll-margin-top: 96px; }
.gauge-box { grid-column: 1 / -1; }
.gauge-box svg { max-width: 360px; margin: 0 auto; }