/* ==========================================================================
   Performind — Sovereign BCI, Neuro-Telemetry & Cognitive Analytics Platform
   Tirja Consulting LLP
   Clean Modern Dark Mode (Violet / Cyan / Emerald)
   ========================================================================== */

:root {
  --bg-primary: #070913;
  --bg-secondary: #0d1224;
  --bg-card: #131a33;
  --bg-card-hover: #1c264a;
  --bg-glass: rgba(13, 18, 36, 0.88);
  --border-color: #232e54;
  --border-light: #36467d;
  
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  /* Brand Accents */
  --accent-violet: #8b5cf6;
  --accent-purple: #a855f7;
  --accent-cyan: #06b6d4;
  --accent-sky: #38bdf8;
  --accent-emerald: #10b981;
  --accent-amber: #f59e0b;
  --accent-rose: #f43f5e;
  
  --gradient-brand: linear-gradient(135deg, #a855f7 0%, #38bdf8 50%, #10b981 100%);
  --gradient-card: linear-gradient(180deg, #131a33 0%, #0d1224 100%);
  --gradient-glow: radial-gradient(circle, rgba(168, 85, 247, 0.22) 0%, rgba(6, 182, 212, 0.12) 40%, rgba(7, 9, 19, 0) 70%);
  
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 32px rgba(168, 85, 247, 0.25);
  
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-xl: 24px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent-sky);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: #7dd3fc;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Navbar */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  padding: 12px 0;
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
  flex-shrink: 0;
}

.brand img,
.brand-logo,
.brand-owner-logo {
  height: 36px !important;
  max-height: 36px !important;
  width: auto !important;
  max-width: 48px !important;
  display: block;
  object-fit: contain;
  flex-shrink: 0;
}

.brand-text {
  letter-spacing: -0.3px;
  background: linear-gradient(135deg, #ffffff 0%, #cbd5e1 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.tm-mark {
  font-size: 0.65rem;
  font-weight: 700;
  color: var(--accent-cyan);
  vertical-align: super;
  margin-left: 2px;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 26px;
  align-items: center;
}

.nav-link {
  color: var(--text-secondary);
  font-size: 0.94rem;
  font-weight: 500;
  padding: 6px 0;
  position: relative;
  transition: color 0.2s ease;
}

.nav-link:hover, .nav-link.active {
  color: var(--text-primary);
}

.nav-link.active::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--accent-violet);
  border-radius: 2px;
}

.menu-toggle {
  display: none;
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
}

/* Hero */
.hero {
  position: relative;
  padding: 85px 0 65px;
  text-align: center;
  overflow: hidden;
}

.hero-bg-glow {
  position: absolute;
  top: -120px;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 520px;
  background: var(--gradient-glow);
  pointer-events: none;
  z-index: 0;
}

.hero .container {
  position: relative;
  z-index: 1;
}

.hero-title {
  font-size: 3.2rem;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
  max-width: 980px;
  margin-left: auto;
  margin-right: auto;
}

.gradient-text {
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.2rem;
  color: var(--text-secondary);
  max-width: 840px;
  margin: 0 auto 34px;
  line-height: 1.65;
}

.hero-cta-group {
  display: flex;
  gap: 16px;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  border: 1px solid transparent;
}

.btn-primary {
  background: linear-gradient(135deg, #8b5cf6 0%, #06b6d4 100%);
  color: #ffffff;
  box-shadow: 0 4px 16px rgba(139, 92, 246, 0.4);
}

.btn-primary:hover {
  filter: brightness(1.12);
  color: #ffffff;
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text-primary);
  border-color: var(--border-color);
}

.btn-secondary:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-light);
  color: #ffffff;
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: 9999px;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.badge-purple {
  background: rgba(168, 85, 247, 0.15);
  color: #c084fc;
  border: 1px solid rgba(168, 85, 247, 0.35);
}

.badge-cyan {
  background: rgba(6, 182, 212, 0.15);
  color: #22d3ee;
  border: 1px solid rgba(6, 182, 212, 0.35);
}

.badge-emerald {
  background: rgba(16, 185, 129, 0.15);
  color: #34d399;
  border: 1px solid rgba(16, 185, 129, 0.35);
}

.badge-tm {
  background: rgba(139, 92, 246, 0.2);
  color: #e9d5ff;
  border: 1px solid rgba(139, 92, 246, 0.5);
  font-size: 0.78rem;
}

/* Sections */
.section {
  padding: 70px 0;
  position: relative;
}

.section-alt {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.section-header {
  text-align: center;
  max-width: 820px;
  margin: 0 auto 50px;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-top: 12px;
  margin-bottom: 14px;
}

.section-description {
  font-size: 1.08rem;
  color: var(--text-secondary);
}

/* Grids */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

/* Cards */
.card {
  background: var(--gradient-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
  display: flex;
  flex-direction: column;
}

.card:hover {
  transform: translateY(-3px);
  border-color: var(--border-light);
  box-shadow: var(--shadow-md);
}

.card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: rgba(139, 92, 246, 0.15);
  color: var(--accent-violet);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 18px;
}

.card-icon.cyan {
  background: rgba(6, 182, 212, 0.15);
  color: var(--accent-cyan);
}

.card-icon.emerald {
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-emerald);
}

.card-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.card-text {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* Brand Asset Showcase Box */
.tm-hero-box {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
  display: flex;
  align-items: center;
  gap: 32px;
  box-shadow: var(--shadow-lg);
  margin-bottom: 50px;
}

.tm-hero-img-wrap {
  width: 140px;
  height: 140px;
  border-radius: var(--radius-md);
  background: #000;
  border: 2px solid var(--accent-violet);
  box-shadow: var(--shadow-glow);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  padding: 10px;
}

.tm-hero-img-wrap img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

.tm-hero-details h3 {
  font-size: 1.45rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.tm-hero-details p {
  color: var(--text-secondary);
  font-size: 0.96rem;
  line-height: 1.6;
}

/* Use Case Gallery */
.usecase-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.usecase-card {
  background: var(--gradient-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.usecase-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent-violet);
  box-shadow: var(--shadow-lg);
}

.usecase-media {
  width: 100%;
  background: #000;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
}

.usecase-media img {
  width: 100%;
  height: auto;
  max-height: 380px;
  object-fit: cover;
  display: block;
}

.usecase-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.usecase-tag {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--accent-cyan);
  letter-spacing: 0.5px;
  margin-bottom: 8px;
}

.usecase-title {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.usecase-desc {
  font-size: 0.94rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 16px;
  flex: 1;
}

/* Feature checklist */
.feature-list {
  list-style: none;
  margin-top: 12px;
}

.feature-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 10px;
  font-size: 0.92rem;
  color: var(--text-secondary);
}

.feature-list li::before {
  content: "✔";
  color: var(--accent-emerald);
  font-weight: bold;
}

/* Diagram container */
.diagram-container {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  margin-top: 24px;
}

/* Table */
.bci-table-wrap {
  overflow-x: auto;
  margin-top: 20px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
}

.bci-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  text-align: left;
}

.bci-table th {
  background: rgba(13, 18, 36, 0.95);
  color: #cbd5e1;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-color);
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.8rem;
  letter-spacing: 0.5px;
}

.bci-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-secondary);
}

.bci-table tr:hover td {
  background: rgba(255, 255, 255, 0.02);
  color: #ffffff;
}

.bci-table code {
  color: #7dd3fc;
  font-family: var(--font-mono);
  font-size: 0.82rem;
}

/* Footer */
.footer {
  background-color: #04060d;
  border-top: 1px solid var(--border-color);
  padding: 60px 0 30px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 50px;
}

.footer-brand p {
  color: var(--text-secondary);
  font-size: 0.92rem;
  margin-top: 12px;
  max-width: 320px;
}

.footer-col h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 16px;
  letter-spacing: 0.5px;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 10px;
}

.footer-links a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  transition: color 0.2s ease;
}

.footer-links a:hover {
  color: var(--text-primary);
}

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Brain-Controlled Game Showcase */
.game-showcase-box {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  box-shadow: var(--shadow-lg);
  margin-top: 36px;
}

.game-viewer {
  background: #000;
  display: flex;
  align-items: center;
  justify-content: center;
  border-right: 1px solid var(--border-color);
  position: relative;
  min-height: 400px;
}

.game-viewer img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

.game-meta {
  padding: 36px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background: var(--gradient-card);
}

/* Report Gallery */
.reports-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-top: 36px;
}

.report-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.report-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent-violet);
  box-shadow: var(--shadow-lg);
}

.report-media {
  background: #0d1224;
  padding: 12px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
}

.report-media img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius-sm);
}

.report-body {
  padding: 22px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

/* Responsive */
@media (max-width: 992px) {
  .hero-title {
    font-size: 2.5rem;
  }
  .grid-2, .grid-3, .grid-4, .usecase-grid, .reports-grid {
    grid-template-columns: 1fr;
  }
  .tm-hero-box, .game-showcase-box {
    grid-template-columns: 1fr;
    flex-direction: column;
  }
  .game-viewer {
    border-right: none;
    border-bottom: 1px solid var(--border-color);
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  .menu-toggle {
    display: block;
  }
  .hero-title {
    font-size: 2rem;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
}