/* ============================================================
   MechatronicSurge — shared stylesheet
   Edit colors in :root below; everything else follows from it.
   ============================================================ */

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --navy: #0a1220;
  --navy-deep: #060d18;
  --navy-card: #0f1c2e;
  --navy-raise: #14243a;
  --amber: #f59e0b;
  --amber-soft: #fbbf24;
  --amber-glow: rgba(245, 158, 11, 0.35);
  --steel: #38bdf8;
  --text: #e2e8f0;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  --border: rgba(245, 158, 11, 0.15);
  --border-soft: rgba(148, 163, 184, 0.14);
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background-color: var(--navy);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Blueprint grid texture */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(245, 158, 11, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(245, 158, 11, 0.03) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
  z-index: 0;
}

/* Radial glow behind hero */
body::after {
  content: "";
  position: fixed;
  top: -20%;
  left: 50%;
  transform: translateX(-50%);
  width: 80vw;
  height: 60vh;
  background: radial-gradient(ellipse at center, var(--amber-glow) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
  opacity: 0.4;
}

.container {
  position: relative;
  z-index: 1;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
}
.container.narrow { max-width: 860px; }

/* ─── Nav ─── */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  background: rgba(6, 13, 24, 0.72);
  border-bottom: 1px solid var(--border-soft);
}
.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0.85rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  color: #fff;
  text-decoration: none;
  font-weight: 700;
  letter-spacing: -0.01em;
  font-size: 1rem;
  white-space: nowrap;
}
.brand-mark {
  width: 22px; height: 22px;
  border: 2px solid var(--amber);
  border-radius: 6px;
  position: relative;
  flex: none;
}
.brand-mark::after {
  content: "";
  position: absolute;
  inset: 4px;
  background: var(--amber);
  border-radius: 2px;
  opacity: 0.85;
}
.nav-links { display: flex; gap: 1.5rem; align-items: center; }
.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s ease;
  white-space: nowrap;
}
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--amber); }

/* ─── Hero ─── */
.hero {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 5.5rem 0 3.5rem;
}
.hero h1 {
  font-size: clamp(2.6rem, 8vw, 5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, #fff 0%, var(--amber-soft) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-shadow: 0 0 40px var(--amber-glow);
  margin-bottom: 1.1rem;
  line-height: 1.08;
}
.hero .tagline {
  font-size: clamp(1.05rem, 2.5vw, 1.3rem);
  color: var(--text-muted);
  max-width: 560px;
}
.hero .lede {
  margin-top: 1.1rem;
  max-width: 620px;
  color: var(--text-dim);
  font-size: 1rem;
}
.accent-line {
  width: 60px; height: 3px;
  background: linear-gradient(90deg, transparent, var(--amber), transparent);
  margin: 2rem auto 0;
  border-radius: 2px;
}

/* Sub-page hero */
.page-hero { padding: 4rem 0 2.5rem; }
.page-hero h1 {
  font-size: clamp(2.2rem, 6vw, 3.4rem);
  font-weight: 800;
  letter-spacing: -0.025em;
  color: #fff;
  line-height: 1.1;
  margin-bottom: 0.9rem;
}
.page-hero .tagline {
  font-size: clamp(1.05rem, 2.2vw, 1.25rem);
  color: var(--text-muted);
  max-width: 640px;
}

/* ─── Buttons ─── */
.btn-row { display: flex; gap: 0.9rem; flex-wrap: wrap; justify-content: center; margin-top: 2rem; }
.btn-row.left { justify-content: flex-start; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.7rem 1.35rem;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, color 0.2s ease;
  border: 1px solid transparent;
}
.btn-primary {
  background: linear-gradient(135deg, var(--amber) 0%, var(--amber-soft) 100%);
  color: #1a1206;
  box-shadow: 0 6px 20px rgba(245, 158, 11, 0.22);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 28px rgba(245, 158, 11, 0.32); }
.btn-ghost { border-color: var(--border); color: var(--text); background: rgba(15, 28, 46, 0.6); }
.btn-ghost:hover { border-color: rgba(245, 158, 11, 0.45); color: var(--amber-soft); transform: translateY(-2px); }

/* ─── Section scaffolding ─── */
.section { padding: 4rem 0; }
.section-head { margin-bottom: 2.25rem; }
.section-head.center { text-align: center; }
.eyebrow {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--amber);
  display: block;
  margin-bottom: 0.65rem;
}
.section-head h2 {
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  font-weight: 700;
  color: #fff;
  letter-spacing: -0.02em;
  line-height: 1.2;
}
.section-head p {
  margin-top: 0.75rem;
  color: var(--text-muted);
  max-width: 640px;
}
.section-head.center p { margin-left: auto; margin-right: auto; }

/* ─── Flagship split blocks ─── */
.flagship {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
  padding: 3.25rem 0;
  border-top: 1px solid var(--border-soft);
}
.flagship.reverse .flagship-copy { order: 2; }
.flagship h3 {
  font-size: clamp(1.5rem, 3.5vw, 2rem);
  font-weight: 700;
  color: #fff;
  letter-spacing: -0.02em;
  margin: 0.4rem 0 0.85rem;
}
.flagship p { color: var(--text-muted); margin-bottom: 1.25rem; }

/* ─── Status pill ─── */
.status {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0.3rem 0.65rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--amber-soft);
  background: rgba(245, 158, 11, 0.07);
}
.status::before {
  content: "";
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--amber);
  box-shadow: 0 0 8px var(--amber);
}
.status.live { color: #6ee7b7; border-color: rgba(110, 231, 183, 0.28); background: rgba(110, 231, 183, 0.07); }
.status.live::before { background: #34d399; box-shadow: 0 0 8px #34d399; }

/* ─── Feature list ─── */
.feature-list { list-style: none; display: grid; gap: 0.6rem; margin-bottom: 1.5rem; }
.feature-list li {
  position: relative;
  padding-left: 1.4rem;
  color: var(--text-muted);
  font-size: 0.95rem;
}
.feature-list li::before {
  content: "";
  position: absolute;
  left: 0; top: 0.62em;
  width: 7px; height: 7px;
  border: 1.5px solid var(--amber);
  transform: rotate(45deg);
}
.feature-list strong { color: var(--text); font-weight: 600; }

/* ─── Screenshot frame (drop-in image slots) ─── */
.shot {
  position: relative;
  background: var(--navy-card);
  border: 1px solid var(--border-soft);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 18px 46px rgba(0, 0, 0, 0.45);
}
.shot::before {
  content: "";
  display: block;
  height: 30px;
  background: linear-gradient(180deg, var(--navy-raise), var(--navy-card));
  border-bottom: 1px solid var(--border-soft);
}
.shot .dots {
  position: absolute;
  top: 11px; left: 12px;
  display: flex; gap: 6px;
}
.shot .dots i {
  width: 8px; height: 8px; border-radius: 50%;
  background: rgba(148, 163, 184, 0.35);
  display: block;
}
.shot .dots i:first-child { background: rgba(245, 158, 11, 0.5); }
.shot img { display: block; width: 100%; height: auto; }
.shot img[hidden], .shot .slot[hidden] { display: none !important; }
.shot .slot {
  aspect-ratio: 16 / 10;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  text-align: center;
  padding: 1.5rem;
  background-image:
    linear-gradient(rgba(245, 158, 11, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(245, 158, 11, 0.05) 1px, transparent 1px);
  background-size: 28px 28px;
}
.shot .slot .slot-title {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--amber);
}
.shot .slot .slot-path {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--text-dim);
  word-break: break-all;
}
.shot.tall .slot { aspect-ratio: 3 / 4; }
.shots-pair { max-width: 720px; margin: 0 auto; }

/* ─── Cards ─── */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
.card {
  background: var(--navy-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.75rem;
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
  position: relative;
  overflow: hidden;
  display: block;
  text-decoration: none;
  color: inherit;
}
.card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--amber), transparent);
  opacity: 0;
  transition: opacity 0.25s ease;
}
.card:hover {
  transform: translateY(-4px);
  border-color: rgba(245, 158, 11, 0.35);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.35), 0 0 20px var(--amber-glow);
}
.card:hover::before { opacity: 1; }
.card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.55rem;
  color: #fff;
  letter-spacing: -0.01em;
}
.card p { font-size: 0.93rem; color: var(--text-muted); line-height: 1.55; }
.card .card-meta {
  display: block;
  margin-top: 1rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-dim);
}
a.card:hover .card-meta { color: var(--amber); }

/* Card icons (CSS-drawn, no assets needed) */
.card-icon { width: 48px; height: 48px; margin-bottom: 1.15rem; display: flex; align-items: center; justify-content: center; }
.icon-ai { width: 36px; height: 36px; border: 2px solid var(--amber); border-radius: 10px; position: relative; }
.icon-ai::before { content: ""; position: absolute; top: 7px; left: 7px; width: 8px; height: 8px; background: var(--amber); border-radius: 50%; box-shadow: 14px 0 0 var(--amber); }
.icon-ai::after { content: ""; position: absolute; bottom: 7px; left: 9px; width: 18px; height: 3px; background: var(--amber); border-radius: 2px; }
.icon-voice { width: 28px; height: 36px; border: 2px solid var(--amber); border-radius: 14px 14px 8px 8px; position: relative; }
.icon-voice::before { content: ""; position: absolute; bottom: -8px; left: 50%; transform: translateX(-50%); width: 14px; height: 6px; border: 2px solid var(--amber); border-top: none; border-radius: 0 0 6px 6px; }
.icon-voice::after { content: ""; position: absolute; bottom: -14px; left: 50%; transform: translateX(-50%); width: 20px; height: 2px; background: var(--amber); border-radius: 1px; }
.icon-agent { width: 36px; height: 36px; position: relative; }
.icon-agent span { position: absolute; width: 12px; height: 12px; border: 2px solid var(--amber); border-radius: 50%; }
.icon-agent span:nth-child(1) { top: 0; left: 12px; }
.icon-agent span:nth-child(2) { bottom: 0; left: 0; }
.icon-agent span:nth-child(3) { bottom: 0; right: 0; }
.icon-agent::before { content: ""; position: absolute; top: 10px; left: 17px; width: 2px; height: 14px; background: var(--amber); transform: rotate(30deg); transform-origin: top; }
.icon-agent::after { content: ""; position: absolute; top: 10px; right: 17px; width: 2px; height: 14px; background: var(--amber); transform: rotate(-30deg); transform-origin: top; }

/* ─── Spec table ─── */
.spec {
  border: 1px solid var(--border-soft);
  border-radius: 12px;
  overflow: hidden;
  background: rgba(15, 28, 46, 0.55);
}
.spec-row {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 1rem;
  padding: 0.85rem 1.25rem;
  border-bottom: 1px solid var(--border-soft);
  font-size: 0.92rem;
}
.spec-row:last-child { border-bottom: none; }
.spec-row dt {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--amber);
  padding-top: 0.15rem;
}
.spec-row dd { color: var(--text-muted); }

/* ─── Tag chips ─── */
.chips { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.chip {
  font-family: var(--mono);
  font-size: 0.75rem;
  padding: 0.3rem 0.7rem;
  border-radius: 6px;
  border: 1px solid var(--border-soft);
  color: var(--text-muted);
  background: rgba(15, 28, 46, 0.7);
}

/* ─── Contact strip ─── */
.contact {
  background: var(--navy-deep);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 1.75rem 0;
  text-align: center;
  position: relative;
  z-index: 1;
}
.contact a {
  color: var(--amber-soft);
  text-decoration: none;
  font-size: 1.1rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  transition: color 0.2s ease, text-shadow 0.2s ease;
}
.contact a:hover { color: #fff; text-shadow: 0 0 12px var(--amber-glow); }

/* ─── Footer ─── */
footer { padding: 2.5rem 0 3rem; text-align: center; position: relative; z-index: 1; }
.footer-links { display: flex; justify-content: center; gap: 2.5rem; margin-bottom: 1.5rem; flex-wrap: wrap; }
.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.2s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}
.footer-links a:hover { color: var(--amber); }
.footer-links svg { width: 18px; height: 18px; fill: currentColor; }
.copyright { font-size: 0.8rem; color: var(--text-dim); }

.back-link {
  display: flex;
  width: fit-content;
  align-items: center;
  gap: 0.4rem;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
}
.back-link:hover { color: var(--amber); }

/* ─── Architecture diagram helpers ─── */
.diagram { width: 100%; height: auto; display: block; }
.diagram text { font-family: var(--mono); }

/* ─── Responsive ─── */
@media (max-width: 860px) {
  .flagship { grid-template-columns: 1fr; gap: 2rem; padding: 2.5rem 0; }
  .flagship.reverse .flagship-copy { order: 0; }
  .grid-3 { grid-template-columns: 1fr; max-width: 420px; margin: 0 auto; }
  .grid-2 { grid-template-columns: 1fr; }
  .spec-row { grid-template-columns: 1fr; gap: 0.25rem; }
  .nav-links { gap: 1rem; }
  .nav-links a { font-size: 0.82rem; }
}
@media (max-width: 560px) {
  .nav-inner { flex-direction: column; gap: 0.55rem; padding: 0.7rem 1rem; }
  .nav-links { gap: 1rem; flex-wrap: wrap; justify-content: center; }
  .footer-links { flex-direction: column; gap: 1rem; }
}

/* Extra CSS icons */
.icon-memory { width: 34px; height: 34px; position: relative; }
.icon-memory::before, .icon-memory::after {
  content: ""; position: absolute; left: 0; width: 34px; height: 9px;
  border: 2px solid var(--amber); border-radius: 3px;
}
.icon-memory::before { top: 2px; }
.icon-memory::after { bottom: 2px; opacity: 0.55; }
.icon-memory span {
  position: absolute; top: 15px; left: 0; width: 34px; height: 9px;
  border: 2px solid var(--amber); border-radius: 3px; opacity: 0.8;
}
.icon-persona { width: 36px; height: 34px; position: relative; }
.icon-persona::before, .icon-persona::after {
  content: ""; position: absolute; top: 4px; width: 22px; height: 22px;
  border: 2px solid var(--amber); border-radius: 50%;
}
.icon-persona::before { left: 0; }
.icon-persona::after { right: 0; opacity: 0.5; }
.icon-clock { width: 34px; height: 34px; border: 2px solid var(--amber); border-radius: 50%; position: relative; }
.icon-clock::before {
  content: ""; position: absolute; top: 7px; left: 14px; width: 2px; height: 10px;
  background: var(--amber); border-radius: 1px;
}
.icon-clock::after {
  content: ""; position: absolute; top: 15px; left: 14px; width: 9px; height: 2px;
  background: var(--amber); border-radius: 1px;
}