/* Tektos AI stylesheet */

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

/* ===== DESIGN TOKENS ===== */
:root {
  /* colours */
  --bg:             #08091a;
  --bg-dark:        #050610;
  --bg-card:        #0d1230;
  --bg-card-border: #1a2050;
  --cyan:           #00d4ff;
  --purple:         #7c3aed;
  --cyan-dim:       rgba(0, 212, 255, 0.15);
  --text:           #e2e8f0;
  --text-muted:     #9aa3b5;
  --text-dim:       #4a5568;

  /* surfaces */
  --nav-bg:         rgba(8, 9, 26, 0.92);
  --grid-line:      rgba(0, 212, 255, 0.04);

  /* layout */
  --nav-height:     72px;
  --radius:         12px;
  --radius-lg:      20px;

  /* animation */
  --transition-theme: background 0.3s, color 0.3s, border-color 0.3s;
}

/* Light theme */
[data-theme="light"] {
  --bg:             #f4f6fb;
  --bg-dark:        #e8ecf5;
  --bg-card:        #ffffff;
  --bg-card-border: #d1d9ee;
  --cyan:           #0099cc;
  --purple:         #6d28d9;
  --cyan-dim:       rgba(0, 153, 204, 0.1);
  --text:           #0f1629;
  --text-muted:     #4a5568;
  --text-dim:       #94a3b8;
  --nav-bg:         rgba(244, 246, 251, 0.92);
  --grid-line:      rgba(0, 153, 204, 0.06);
}

/* ===== GLOBAL ===== */
html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', sans-serif;
  font-size: 16px;
  line-height: 1.7;
  overflow-x: hidden;
  transition: var(--transition-theme);
}

h1, h2, h3, h4 {
  font-family: 'Space Grotesk', sans-serif;
  line-height: 1.2;
}

a { text-decoration: none; color: inherit; }
img { max-width: 100%; }

/* Skip link for keyboard accessibility */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 8px;
  z-index: 9999;
  padding: 8px 16px;
  background: var(--cyan);
  color: #000;
  font-weight: 600;
  border-radius: var(--radius);
}
.skip-link:focus { left: 8px; }

/* Screen-reader only */
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

/* Focus ring */
:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ===== UTILITIES ===== */
.container {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
}

.gradient-text {
  background: linear-gradient(90deg, var(--cyan) 0%, var(--purple) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section       { padding: 100px 0; }
.section-dark  { background: var(--bg-dark); }

.section-label {
  font-size: 36px;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 16px;
}

.section-title {
  font-size: clamp(1.8rem, 3.5vw, 2.7rem);
  font-weight: 700;
  color: var(--text);
  margin-bottom: 48px;
}

/* ===== BUTTONS ===== */
.btn-primary {
  display: inline-block;
  background: linear-gradient(135deg, var(--cyan) 0%, var(--purple) 100%);
  color: #fff;
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 600;
  font-size: 15px;
  padding: 14px 32px;
  border-radius: 8px;
  transition: opacity 0.2s, transform 0.2s;
}
.btn-primary:hover { opacity: 0.88; transform: translateY(-1px); }

.btn-ghost {
  display: inline-block;
  border: 1px solid var(--bg-card-border);
  color: var(--text);
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 500;
  font-size: 15px;
  padding: 14px 32px;
  border-radius: 8px;
  transition: border-color 0.2s, background 0.2s;
}
.btn-ghost:hover { border-color: var(--cyan); background: var(--cyan-dim); }

/* ===== NAV ===== */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 0;
  transition: background 0.3s, box-shadow 0.3s;
}
.nav-scrolled {
  background: var(--nav-bg);
  backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 var(--bg-card-border);
}
[data-theme="light"] .nav-scrolled {
  box-shadow: 0 1px 0 var(--bg-card-border), 0 2px 8px rgba(0,0,0,0.06);
}

.nav-inner {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--nav-height);
}

.nav-logo { display: flex; align-items: center; }
.nav-logo-img {
  height: var(--nav-height);
  width: var(--nav-height);
  border-radius: 0;
  object-fit: cover;
  display: block;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
  padding: 0 16px;
}
.nav-links a {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-muted);
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--text); }

.btn-nav {
  background: var(--cyan-dim) !important;
  border: 1px solid var(--cyan) !important;
  color: var(--cyan) !important;
  padding: 8px 20px;
  border-radius: 8px;
  font-size: 14px !important;
}
.btn-nav:hover { opacity: 0.85; }

.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  align-self: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--bg-card-border);
  background: var(--bg-card);
  cursor: pointer;
  font-size: 26px;
  color: var(--text-muted);
  flex-shrink: 0;
  transition: border-color 0.2s, background 0.2s, color 0.2s;
}
.theme-toggle:hover { border-color: var(--cyan); color: var(--cyan); }

.theme-icon-dark { display: inline; font-size: 26px; }
.theme-icon-light { display: none; font-size: 32px; }
[data-theme="light"] .theme-icon-dark { display: none; }
[data-theme="light"] .theme-icon-light { display: inline; }

.nav-toggle {
  display: none;
  align-self: center;
  background: none;
  border: none;
  color: var(--text);
  font-size: 22px;
  cursor: pointer;
  width: 44px;
  height: 44px;
}

/* ===== HERO ===== */
.hero-grid-overlay {
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
  z-index: 0;
}

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 120px 24px 80px;
  position: relative;
  overflow: hidden;
  max-width: 1160px;
  margin: 0 auto;
  gap: 60px;
}

.hero-content {
  flex: 1;
  position: relative;
  z-index: 1;
  padding: 0;
}

.hero-badge {
  display: inline-block;
  background: var(--cyan-dim);
  border: 1px solid rgba(0, 212, 255, 0.3);
  color: var(--cyan);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 6px 16px;
  border-radius: 100px;
  margin-bottom: 24px;
}

.hero-title {
  font-size: clamp(1.5rem, 3.2vw, 2.4rem);
  font-weight: 700;
  color: var(--text);
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}

.hero-sub {
  font-size: 18px;
  color: var(--text-muted);
  max-width: 520px;
  margin-bottom: 40px;
  line-height: 1.75;
}

.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }

.hero-visual {
  flex: 0 0 420px;
  position: relative;
  z-index: 1;
}

.hero-img-wrap {
  width: 100%;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--bg-card-border);
}
.hero-img {
  width: 100%;
  height: 340px;
  object-fit: cover;
  display: block;
}

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  pointer-events: none;
}
.orb-1 {
  width: 280px; height: 280px;
  background: radial-gradient(circle, rgba(0,212,255,0.2) 0%, transparent 70%);
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
}
.orb-2 {
  width: 200px; height: 200px;
  background: radial-gradient(circle, rgba(124,58,237,0.25) 0%, transparent 70%);
  top: 30%; left: 60%;
}

/* ===== TOOLS ===== */
.tool-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  padding: 64px 0;
  border-bottom: 1px solid var(--bg-card-border);
}
.tool-row:last-child { border-bottom: none; }
.tool-row-reverse { direction: rtl; }
.tool-row-reverse > * { direction: ltr; }

.tool-text h3 {
  font-size: clamp(1.1rem, 2.3vw, 1.6rem);
  color: var(--text);
  margin-bottom: 24px;
  line-height: 1.25;
}
.tool-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 24px;
}
.tool-list li {
  display: flex;
  gap: 12px;
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.6;
}
.tool-list li::before {
  content: '';
  flex-shrink: 0;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--cyan);
  margin-top: 9px;
  box-shadow: 0 0 6px var(--cyan);
}
.tool-badge {
  display: inline-block;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 13px;
  font-weight: 700;
  padding: 6px 16px;
  border-radius: 100px;
  background: linear-gradient(135deg, rgba(0,212,255,0.15), rgba(124,58,237,0.15));
  border: 1px solid rgba(0,212,255,0.3);
  color: var(--cyan);
  letter-spacing: 0.04em;
}

.tool-img {
  width: 100%;
  aspect-ratio: 16/10;
  object-fit: cover;
  border-radius: var(--radius-lg);
  border: 1px solid var(--bg-card-border);
  display: block;
}

/* ===== WHY ===== */
.why-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}
.why-lead {
  font-size: 18px;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 32px;
}
.why-pillars { display: flex; flex-direction: column; gap: 36px; }
.pillar h4 { font-size: 22px; color: var(--text); margin-bottom: 8px; }
.pillar p  { font-size: 14px; color: var(--text-muted); line-height: 1.7; }

/* ===== TEAM ===== */
.team-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}
.team-card {
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: border-color 0.2s, transform 0.2s;
}
.team-card:hover { border-color: rgba(0, 212, 255, 0.3); transform: translateY(-3px); }

.team-photo-wrap { position: relative; height: 260px; overflow: hidden; }
.team-photo {
  width: 100%; height: 100%;
  object-fit: cover;
  object-position: top center;
  display: block;
  filter: grayscale(20%);
  transition: filter 0.3s;
}
.team-card:hover .team-photo { filter: grayscale(0%); }
.team-photo-glow {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 80px;
  background: linear-gradient(transparent, var(--bg-card));
}

.team-info { padding: 28px; flex: 1; }
.team-info h3 { font-size: 22px; color: var(--text); margin-bottom: 4px; }
.team-role {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 16px;
}
.team-bio { font-size: 14px; color: var(--text-muted); line-height: 1.7; margin-bottom: 12px; }
.team-links { display: flex; gap: 12px; margin-top: 20px; flex-wrap: wrap; }
.team-link {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.05em;
  padding: 5px 14px;
  border-radius: 100px;
  border: 1px solid var(--bg-card-border);
  color: var(--text-muted);
  transition: border-color 0.2s, color 0.2s;
}
.team-link:hover { border-color: var(--cyan); color: var(--cyan); }

/* ===== CONTACT ===== */
.contact-wrap { text-align: center; max-width: 680px; margin: 0 auto; }
.contact-sub {
  font-size: 17px;
  color: var(--text-muted);
  margin-bottom: 32px;
  line-height: 1.8;
}

/* ===== FOOTER ===== */
.footer {
  background: var(--bg-dark);
  border-top: 1px solid var(--bg-card-border);
  padding: 48px 0;
  transition: var(--transition-theme);
}
.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  text-align: center;
}
.footer-brand { display: flex; align-items: center; gap: 10px; margin-bottom: 4px; }
.footer-logo { width: 80px; height: 80px; border-radius: 12px; object-fit: cover; }
.footer-tagline { font-size: 14px; color: var(--text-muted); }
.footer-copy { font-size: 13px; color: var(--text-dim); }

/* ===== SCROLL FADE-IN ===== */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* ===== RESPONSIVE - tablet (max-width 900px) ===== */
@media (max-width: 900px) {
  .hero {
    flex-direction: column;
    padding-top: 100px;
    text-align: center;
  }
  .hero-sub { margin-left: auto; margin-right: auto; }
  .hero-actions { justify-content: center; }
  .hero-visual { flex: 0 0 auto; width: 100%; }

  .tool-row { grid-template-columns: 1fr; gap: 32px; direction: ltr; }
  .tool-row-reverse { direction: ltr; }
  .why-layout { grid-template-columns: 1fr; gap: 48px; }
  .team-grid { grid-template-columns: 1fr; max-width: 480px; margin: 0 auto; }
}

/* ===== RESPONSIVE - mobile (max-width 640px) ===== */
@media (max-width: 640px) {
  .nav-links {
    display: none;
    flex-direction: column;
    position: absolute;
    top: var(--nav-height);
    left: 0; right: 0;
    background: var(--nav-bg);
    backdrop-filter: blur(12px);
    padding: 20px;
    gap: 16px;
    border-bottom: 1px solid var(--bg-card-border);
  }
  .nav-links.nav-open { display: flex; }
  .nav-toggle { display: flex; }

  .hero { padding: 100px 24px 60px; }
  .hero-visual { display: none; }

  .section { padding: 64px 0; }
  .section-label { font-size: 20px; }
  .tool-row { padding: 40px 0; }
}