/* IntelligenceISIT — confident, AI-native landing */
:root {
  --bg: #05080f;
  --bg-elevated: #0b1220;
  --bg-card: rgba(14, 22, 38, 0.72);
  --border: rgba(148, 163, 184, 0.12);
  --border-strong: rgba(94, 234, 212, 0.28);
  --text: #e8eef8;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  --accent: #5eead4;
  --accent-2: #818cf8;
  --accent-3: #38bdf8;
  --danger: #f472b6;
  --glow: rgba(94, 234, 212, 0.15);
  --font: "DM Sans", system-ui, sans-serif;
  --display: "Syne", "DM Sans", system-ui, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, monospace;
  --radius: 16px;
  --header-h: 72px;
  --max: 1120px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  font-size: 1.05rem;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img,
svg {
  display: block;
  max-width: 100%;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.15s ease, opacity 0.15s ease;
}

a:hover {
  color: #99f6e4;
}

/* Ambient layers */
.noise {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 50;
  opacity: 0.04;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.grid-bg {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 0;
  background-image:
    linear-gradient(rgba(148, 163, 184, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 163, 184, 0.04) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 20%, transparent 75%);
}

#constellation {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 0;
  opacity: 0.55;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 clamp(1.25rem, 4vw, 2.5rem);
  background: rgba(5, 8, 15, 0.75);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--text);
}

.logo:hover {
  color: var(--text);
}

.logo-mark {
  width: 36px;
  height: 36px;
  color: var(--accent);
}

.logo-text {
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.02em;
}

.logo-text strong {
  font-weight: 800;
  color: var(--accent);
}

.nav {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.nav a {
  color: var(--text-muted);
  font-size: 0.92rem;
  font-weight: 500;
}

.nav a:hover {
  color: var(--text);
}

.nav-cta {
  padding: 0.5rem 1rem;
  border-radius: 999px;
  background: linear-gradient(135deg, rgba(94, 234, 212, 0.15), rgba(129, 140, 248, 0.15));
  border: 1px solid var(--border-strong);
  color: var(--text) !important;
}

.nav-cta:hover {
  border-color: var(--accent);
  background: linear-gradient(135deg, rgba(94, 234, 212, 0.25), rgba(129, 140, 248, 0.2));
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  background: none;
  border: none;
  padding: 8px;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 1px;
}

/* Layout */
main {
  position: relative;
  z-index: 1;
}

.section {
  padding: clamp(4rem, 10vw, 7rem) clamp(1.25rem, 4vw, 2.5rem);
  max-width: calc(var(--max) + 5rem);
  margin: 0 auto;
}

.section-head {
  max-width: 720px;
  margin-bottom: 3rem;
}

.eyebrow {
  font-family: var(--mono);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 0.85rem;
}

.section h2 {
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(1.85rem, 4vw, 2.75rem);
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin: 0 0 1rem;
}

.section-lead {
  color: var(--text-muted);
  font-size: 1.1rem;
  margin: 0;
  max-width: 540px;
}

/* Hero */
.hero {
  position: relative;
  max-width: calc(var(--max) + 5rem);
  margin: 0 auto;
  padding: clamp(3.5rem, 12vw, 7rem) clamp(1.25rem, 4vw, 2.5rem) clamp(3rem, 8vw, 5rem);
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.4rem 0.9rem 0.4rem 0.65rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(14, 22, 38, 0.8);
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 1.75rem;
}

.pulse {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 0 rgba(94, 234, 212, 0.6);
  animation: pulse 2s ease infinite;
}

@keyframes pulse {
  0% {
    box-shadow: 0 0 0 0 rgba(94, 234, 212, 0.55);
  }
  70% {
    box-shadow: 0 0 0 10px rgba(94, 234, 212, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(94, 234, 212, 0);
  }
}

.hero h1 {
  font-family: var(--display);
  font-weight: 800;
  font-size: clamp(2.6rem, 7.5vw, 4.6rem);
  line-height: 1.05;
  letter-spacing: -0.035em;
  margin: 0 0 1.5rem;
  max-width: 14ch;
}

.gradient-text {
  background: linear-gradient(120deg, var(--accent) 0%, var(--accent-3) 45%, var(--accent-2) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-lead {
  max-width: 38rem;
  color: var(--text-muted);
  font-size: clamp(1.05rem, 2vw, 1.2rem);
  margin: 0 0 2rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-bottom: 3.5rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.4rem;
  border-radius: 999px;
  font-family: var(--font);
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease, border-color 0.15s ease;
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  color: #042f2e;
  background: linear-gradient(135deg, #5eead4, #2dd4bf);
  box-shadow: 0 0 0 1px rgba(94, 234, 212, 0.3), 0 12px 40px rgba(45, 212, 191, 0.2);
}

.btn-primary:hover {
  color: #042f2e;
  box-shadow: 0 0 0 1px rgba(94, 234, 212, 0.5), 0 16px 48px rgba(45, 212, 191, 0.35);
}

.btn-ghost {
  color: var(--text);
  background: transparent;
  border-color: var(--border);
}

.btn-ghost:hover {
  color: var(--text);
  border-color: rgba(148, 163, 184, 0.35);
  background: rgba(255, 255, 255, 0.03);
}

.btn-block {
  width: 100%;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin: 0;
  padding: 1.5rem 0 0;
  border-top: 1px solid var(--border);
}

.hero-stats div {
  padding: 0.25rem 0;
}

.hero-stats dt {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 0.35rem;
}

.hero-stats dd {
  margin: 0;
  font-weight: 600;
  font-size: 1rem;
  letter-spacing: -0.02em;
}

/* Trust */
.trust {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 1.25rem clamp(1.25rem, 4vw, 2.5rem);
  border-block: 1px solid var(--border);
  background: linear-gradient(90deg, transparent, rgba(94, 234, 212, 0.04), transparent);
}

.trust p {
  margin: 0 auto;
  max-width: 40rem;
  font-size: 0.98rem;
  color: var(--text-muted);
  font-style: italic;
}

/* Cards */
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.15rem;
}

.card {
  padding: 1.5rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
  border-color: var(--border-strong);
  transform: translateY(-2px);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.35), 0 0 0 1px rgba(94, 234, 212, 0.08);
}

.card-icon {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  margin-bottom: 1.1rem;
  color: var(--accent);
  background: rgba(94, 234, 212, 0.08);
  border: 1px solid rgba(94, 234, 212, 0.15);
}

.card-icon svg {
  width: 22px;
  height: 22px;
}

.card h3 {
  font-family: var(--display);
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 0.6rem;
}

.card p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* AI panel */
.section-ai {
  max-width: none;
  padding-left: 0;
  padding-right: 0;
}

.ai-panel {
  max-width: calc(var(--max) + 5rem);
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 4vw, 2.5rem);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  align-items: center;
}

.ai-copy p {
  color: var(--text-muted);
}

.checklist {
  list-style: none;
  padding: 0;
  margin: 1.75rem 0 0;
}

.checklist li {
  position: relative;
  padding: 0.55rem 0 0.55rem 1.75rem;
  color: var(--text);
  font-size: 0.98rem;
  border-bottom: 1px solid var(--border);
}

.checklist li:last-child {
  border-bottom: none;
}

.checklist li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.85rem;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px rgba(94, 234, 212, 0.6);
}

.terminal {
  border-radius: 14px;
  border: 1px solid var(--border);
  background: #070b14;
  box-shadow:
    0 0 0 1px rgba(94, 234, 212, 0.06),
    0 30px 80px rgba(0, 0, 0, 0.55),
    inset 0 1px 0 rgba(255, 255, 255, 0.04);
  overflow: hidden;
}

.terminal-bar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 0.75rem 1rem;
  background: rgba(255, 255, 255, 0.03);
  border-bottom: 1px solid var(--border);
}

.terminal-bar span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #334155;
}

.terminal-bar span:nth-child(1) {
  background: #f87171;
}
.terminal-bar span:nth-child(2) {
  background: #fbbf24;
}
.terminal-bar span:nth-child(3) {
  background: #34d399;
}

.terminal-bar em {
  margin-left: auto;
  font-style: normal;
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--text-dim);
}

.terminal-body {
  margin: 0;
  padding: 1.25rem 1.35rem 1.5rem;
  font-family: var(--mono);
  font-size: 0.78rem;
  line-height: 1.7;
  overflow-x: auto;
  color: #cbd5e1;
}

.t-muted {
  color: #64748b;
}
.t-cmd {
  color: var(--accent);
}
.t-str {
  color: #a5b4fc;
}
.t-ok {
  color: #34d399;
}
.t-num {
  color: #fbbf24;
}

/* Steps */
.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-card);
}

.steps li {
  display: grid;
  grid-template-columns: 88px 1fr;
  gap: 1rem;
  padding: 1.5rem 1.75rem;
  border-bottom: 1px solid var(--border);
}

.steps li:last-child {
  border-bottom: none;
}

.step-num {
  font-family: var(--mono);
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--accent);
  padding-top: 0.15rem;
}

.steps h3 {
  font-family: var(--display);
  font-size: 1.15rem;
  margin: 0 0 0.4rem;
  letter-spacing: -0.02em;
}

.steps p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* Stack */
.section-stack {
  background: radial-gradient(ellipse 80% 50% at 50% 100%, rgba(129, 140, 248, 0.08), transparent);
}

.stack-rows {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}

.stack-row {
  padding: 1.35rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: rgba(11, 18, 32, 0.6);
}

.stack-row h3 {
  font-family: var(--mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent-2);
  margin: 0 0 1rem;
}

.stack-row ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.stack-row li {
  padding: 0.4rem 0;
  font-size: 0.92rem;
  color: var(--text-muted);
  border-bottom: 1px solid rgba(148, 163, 184, 0.08);
}

.stack-row li:last-child {
  border-bottom: none;
}

/* Quote */
.quote-section {
  text-align: center;
}

.quote-section blockquote {
  margin: 0 auto;
  max-width: 42rem;
  padding: 2.5rem 2rem;
  border-radius: var(--radius);
  border: 1px solid var(--border-strong);
  background: linear-gradient(145deg, rgba(94, 234, 212, 0.06), rgba(129, 140, 248, 0.08));
}

.quote-section p {
  font-family: var(--display);
  font-size: clamp(1.25rem, 3vw, 1.65rem);
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: -0.02em;
  margin: 0 0 1rem;
}

.quote-section footer {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--text-dim);
}

/* Contact */
.contact-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  padding: clamp(1.75rem, 4vw, 2.75rem);
  border-radius: calc(var(--radius) + 4px);
  border: 1px solid var(--border);
  background:
    radial-gradient(ellipse 60% 80% at 0% 0%, rgba(94, 234, 212, 0.1), transparent 50%),
    var(--bg-elevated);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.4);
}

.contact-meta {
  list-style: none;
  margin: 2rem 0 0;
  padding: 0;
}

.contact-meta li {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  padding: 0.75rem 0;
  border-top: 1px solid var(--border);
}

.contact-meta span {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.contact-meta a {
  color: var(--text);
  font-weight: 500;
}

.contact-meta a:hover {
  color: var(--accent);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.contact-form label {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-muted);
}

.contact-form input,
.contact-form textarea {
  font: inherit;
  color: var(--text);
  background: rgba(5, 8, 15, 0.6);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.75rem 0.9rem;
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
  resize: vertical;
}

.contact-form input::placeholder,
.contact-form textarea::placeholder {
  color: var(--text-dim);
}

.contact-form input:focus,
.contact-form textarea:focus {
  border-color: rgba(94, 234, 212, 0.45);
  box-shadow: 0 0 0 3px rgba(94, 234, 212, 0.12);
}

.form-note {
  margin: 0;
  font-size: 0.78rem;
  color: var(--text-dim);
  text-align: center;
}

/* Footer */
.site-footer {
  position: relative;
  z-index: 1;
  max-width: calc(var(--max) + 5rem);
  margin: 0 auto;
  padding: 2.5rem clamp(1.25rem, 4vw, 2.5rem) 3rem;
  border-top: 1px solid var(--border);
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 1.5rem;
}

.footer-brand p {
  margin: 0.5rem 0 0;
  color: var(--text-dim);
  font-size: 0.9rem;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  justify-content: flex-end;
  align-items: start;
}

.footer-links a {
  color: var(--text-muted);
  font-size: 0.9rem;
}

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

.footer-copy {
  grid-column: 1 / -1;
  margin: 0.5rem 0 0;
  font-size: 0.8rem;
  color: var(--text-dim);
}

/* Responsive */
@media (max-width: 960px) {
  .card-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .ai-panel,
  .contact-card,
  .stack-rows {
    grid-template-columns: 1fr;
  }

  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
  }

  .site-footer {
    grid-template-columns: 1fr;
  }

  .footer-links {
    justify-content: flex-start;
  }
}

@media (max-width: 720px) {
  .nav {
    display: none;
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0.5rem 1.25rem 1.25rem;
    background: rgba(5, 8, 15, 0.96);
    border-bottom: 1px solid var(--border);
  }

  .nav.is-open {
    display: flex;
  }

  .nav a {
    padding: 0.85rem 0;
    border-bottom: 1px solid var(--border);
  }

  .nav-cta {
    margin-top: 0.75rem;
    text-align: center;
  }

  .nav-toggle {
    display: flex;
  }

  .card-grid {
    grid-template-columns: 1fr;
  }

  .steps li {
    grid-template-columns: 1fr;
    gap: 0.35rem;
  }

  .hero h1 {
    max-width: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .pulse {
    animation: none;
  }

  .card:hover {
    transform: none;
  }
}