/* ═══════════════════════════════════════════════════════
   SysMindLab — shared styles for all public pages
   ═══════════════════════════════════════════════════════ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #0f1117;
  --surface: #1a1d27;
  --surface2: #22263a;
  --border: #2e3250;
  --accent: #6c63ff;
  --text: #e2e8f0;
  --muted: #7c85a2;
  --good: #43e97b;
  --warn: #f7971e;
  --bad: #ff6584;
  --accent-glow: rgba(108, 99, 255, 0.15);
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  line-height: 1.6;
  min-height: 100vh;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── NAVIGATION ── */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(15, 17, 23, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 0 1.5rem;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.nav-logo {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text);
  white-space: nowrap;
  text-decoration: none;
}
.nav-logo:hover { text-decoration: none; color: var(--accent); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  list-style: none;
}

.nav-links a {
  color: var(--muted);
  font-size: 0.9rem;
  padding: 0.35rem 0.75rem;
  border-radius: 6px;
  transition: color 0.15s, background 0.15s;
}

.nav-links a:hover {
  color: var(--text);
  background: var(--surface);
  text-decoration: none;
}

.nav-links a.active {
  color: var(--text);
  background: var(--surface2);
}

/* CTA button in nav */
.nav-cta {
  background: var(--accent) !important;
  color: #fff !important;
  font-weight: 600 !important;
  padding: 0.4rem 1rem !important;
  border-radius: 7px !important;
  margin-left: 0.5rem;
  transition: opacity 0.15s, transform 0.15s !important;
}
.nav-cta:hover {
  opacity: 0.88;
  transform: translateY(-1px);
  background: var(--accent) !important;
  text-decoration: none !important;
}

/* Mobile burger */
.nav-burger {
  display: none;
  background: none;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-size: 1.1rem;
  padding: 0.3rem 0.6rem;
  cursor: pointer;
}

@media (max-width: 680px) {
  .nav-links { display: none; flex-direction: column; }
  .nav-links.open {
    display: flex;
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    padding: 0.75rem 1.5rem;
    gap: 0.25rem;
  }
  .nav-burger { display: block; }
}

/* ── FOOTER ── */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 2rem 1.5rem 1.5rem;
  text-align: center;
  font-size: 0.82rem;
  color: var(--muted);
  margin-top: auto;
}

.site-footer a { color: var(--muted); }
.site-footer a:hover { color: var(--text); text-decoration: none; }

.footer-links {
  margin-top: 0.6rem;
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.footer-legal {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  font-size: 0.72rem;
  color: #4a5168;
  line-height: 1.7;
}

/* ── SHARED BUTTON ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.55rem 1.3rem;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  border: none;
  text-decoration: none;
}
.btn:hover { text-decoration: none; }

.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:hover {
  background: #7b74ff;
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(108, 99, 255, 0.35);
}

.btn-secondary {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-secondary:hover { background: var(--surface2); }