/* Shared styles for the growth/ sandbox. Mirrors the live theme but is a SEPARATE
   file — editing it never touches the production site. */
:root {
  --bg: #0c0f14; --panel: #141a22; --panel-2: #1a212b; --elev: #1e2630;
  --border: #232c38; --border-2: #2e3a48;
  --text: #e7edf4; --dim: #9aa7b4; --mute: #66727f;
  --accent: #4c8dff; --accent-2: #3a72e0; --accent-soft: rgba(76,141,255,0.14);
  --ok: #46c06b; --r: 12px; --r-sm: 8px; --shadow: 0 6px 24px rgba(0,0,0,0.35);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
* { box-sizing: border-box; }
body { margin: 0; font-family: var(--font); color: var(--text); font-size: 15px; line-height: 1.55;
  background: radial-gradient(1200px 600px at 70% -10%, #121a26 0%, var(--bg) 55%) fixed; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Header matches the main site (style.css .app-header/.app-nav) for cohesion. */
.app-header { position: sticky; top: 0; z-index: 20; display: flex; align-items: center; gap: 12px; height: 56px; padding: 0 22px;
  background: rgba(12, 15, 20, 0.82); backdrop-filter: blur(10px); border-bottom: 1px solid var(--border); }
.logo { display: flex; align-items: center; gap: 10px; }
.logo img { display: block; border-radius: 5px; }
.logo .name { font-weight: 700; font-size: 19.4px; letter-spacing: 0.2px; color: var(--text); }
.logo:hover { text-decoration: none; }
.header-spacer { flex: 1; }
.app-nav { display: flex; gap: 20px; }
.app-nav a { color: var(--dim); font-size: 13px; font-weight: 600; transition: color 0.15s; }
.app-nav a:hover { color: var(--text); text-decoration: none; }
.app-nav a.active { color: var(--text); }

.wrap { max-width: 880px; margin: 0 auto; padding: 34px 22px 72px; }
.eyebrow { color: var(--accent); font-size: 12px; font-weight: 700; letter-spacing: 1px; text-transform: uppercase; }
h1 { font-size: 30px; line-height: 1.2; margin: 8px 0 0; }
h2 { font-size: 20px; margin: 34px 0 10px; }
.lead { font-size: 17px; color: var(--dim); margin: 14px 0 0; }
p { color: var(--dim); }
.muted { color: var(--mute); font-size: 13px; }
.cta { display: inline-block; margin-top: 6px; background: linear-gradient(180deg, var(--accent) 0%, var(--accent-2) 100%);
  color: #fff; font-weight: 600; padding: 11px 20px; border-radius: var(--r-sm); }
.cta:hover { filter: brightness(1.08); text-decoration: none; }

/* ---- calculator ---- */
.calc { background: linear-gradient(180deg, var(--panel) 0%, var(--panel-2) 100%);
  border: 1px solid var(--border); border-radius: var(--r); padding: 18px; margin: 22px 0; box-shadow: var(--shadow); }
.calc .axle-label { display: block; font-size: 12px; color: var(--dim); text-transform: uppercase;
  letter-spacing: 0.5px; font-weight: 600; margin-top: 8px; }
.dims { display: flex; gap: 8px; margin: 8px 0 4px; }
.dim { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 4px; font-size: 10.5px;
  color: var(--mute); text-transform: uppercase; letter-spacing: 0.4px; }
.dim input { width: 100%; padding: 8px 9px; font-size: 14px; background: var(--bg); color: var(--text);
  border: 1px solid var(--border-2); border-radius: var(--r-sm); text-transform: none; }
.dim input:focus { outline: none; border-color: var(--accent); }
.square { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--dim); margin: 8px 0; cursor: pointer; }
.fitments { display: flex; gap: 8px; margin: 12px 0; }
.fitment { flex: 1; display: flex; flex-direction: column; align-items: center; gap: 5px; padding: 9px 4px 7px;
  background: var(--bg); border: 1px solid var(--border); border-radius: var(--r-sm); color: var(--mute);
  cursor: pointer; font-size: 11px; transition: border-color .15s, color .15s, background .15s; }
.fitment svg { width: 30px; height: 20px; }
.fitment svg path { fill: none; stroke: currentColor; stroke-width: 1.5; stroke-linejoin: round; }
.fitment svg .rim { fill: currentColor; stroke: none; }
.fitment:hover { border-color: var(--accent); color: var(--text); }
.fitment.on { border-color: var(--accent); background: var(--accent-soft); color: #cfe0ff; }
.results { border-top: 1px solid var(--border); margin-top: 12px; padding-top: 12px; display: flex; flex-direction: column; gap: 7px; }
.res-row { display: flex; align-items: baseline; gap: 10px; }
.res-label { flex: 0 0 auto; min-width: 48px; font-size: 12px; color: var(--dim); text-transform: uppercase; letter-spacing: 0.5px; font-weight: 600; }
.res-val { font-size: 14px; color: var(--text); }
.res-val strong { color: var(--accent); font-weight: 700; }
.res-sep { color: var(--mute); font-size: 12px; }
.calc.squared .axle[data-axle="rear"], .calc.squared .res-row[data-axle="rear"] { display: none; }

/* ---- listing / page content ---- */
.tire-list { list-style: none; padding: 0; margin: 16px 0; }
.tire-list li { display: flex; flex-wrap: wrap; align-items: baseline; gap: 8px; padding: 12px 0; border-bottom: 1px solid var(--border); }
.tire-name { font-weight: 600; color: var(--text); font-size: 15px; }
.tag { font-size: 11px; color: var(--dim); border: 1px solid var(--border-2); border-radius: 999px; padding: 2px 8px; }
.tag.tw { color: #cfe0ff; border-color: rgba(76,141,255,0.4); }
.price { margin-left: auto; color: var(--text); font-weight: 600; }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px,1fr)); gap: 12px; margin: 16px 0; }
/* brand wordmarks (placeholder for real logos) */
.brand-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px,1fr)); gap: 12px; margin: 20px 0; }
.wordmark { display: flex; align-items: center; justify-content: center; text-align: center; height: 78px; padding: 10px;
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--r);
  font-weight: 800; font-size: 16px; letter-spacing: 0.5px; text-transform: uppercase; color: var(--text); }
.wordmark:hover { border-color: var(--accent); color: #cfe0ff; text-decoration: none; }
.model-list { list-style: none; padding: 0; margin: 18px 0; }
.model-list li { padding: 0; border-bottom: 1px solid var(--border); }
.model-list a { display: flex; flex-wrap: wrap; align-items: baseline; gap: 10px; padding: 13px 2px; color: var(--text); }
.model-list a:hover { text-decoration: none; color: #cfe0ff; }
.model-list .mname { font-weight: 600; font-size: 16px; }
.model-list .meta { margin-left: auto; color: var(--mute); font-size: 13px; }
.size-links { display: flex; flex-wrap: wrap; gap: 8px; margin: 18px 0; }
.size-links a { padding: 8px 12px; background: var(--panel); border: 1px solid var(--border-2); border-radius: 999px;
  font-size: 14px; color: var(--text); white-space: nowrap; }
.size-links a:hover { border-color: var(--accent); color: #cfe0ff; text-decoration: none; }
.size-links a .p { color: var(--mute); font-size: 12px; margin-left: 4px; }
.dia-head { font-size: 22px; font-weight: 700; color: var(--text); margin: 30px 0 6px; padding-bottom: 7px; border-bottom: 1px solid var(--border); }
.dia-head .dia-count { font-size: 13px; font-weight: 400; color: var(--mute); margin-left: 8px; }
.card { display: block; padding: 14px 16px; background: var(--panel); border: 1px solid var(--border); border-radius: var(--r); }
.card:hover { border-color: var(--accent); text-decoration: none; }
.card .t { font-weight: 600; color: var(--text); }
.card .s { color: var(--mute); font-size: 13px; }
footer { border-top: 1px solid var(--border); margin-top: 40px; padding: 20px 22px; color: var(--mute); font-size: 13px; text-align: center; }