/* ===================================================
   i9 Labs — Design System & Styles
   =================================================== */

/* --- Design Tokens --- */
:root {
  /* Base - Dark */
  --bg-primary: #0a0a0f;
  --bg-secondary: #111118;
  --bg-tertiary: #1a1a24;

  /* Text */
  --text-primary: #f0f0f5;
  --text-secondary: #8a8a9a;
  --text-tertiary: #5a5a6e;

  /* Accent Gradient Spectrum (blue family — matches logo) */
  --accent-blue: #2563eb;
  --accent-sky: #3b82f6;
  --accent-light: #60a5fa;
  --accent-emerald: #10b981;

  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #1d439c 0%, #2563eb 40%, #60a5fa 100%);
  --gradient-primary-hover: linear-gradient(135deg, #2563eb 0%, #3b82f6 40%, #93b4df 100%);

  /* Borders & Surfaces */
  --border-subtle: rgba(255,255,255,0.06);
  --border-default: rgba(255,255,255,0.10);
  --border-accent: rgba(37,99,235,0.35);

  /* Shadows & Glows */
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
  --shadow-md: 0 8px 30px rgba(0,0,0,0.4);
  --shadow-lg: 0 20px 60px rgba(0,0,0,0.5);
  --glow-accent: 0 0 40px rgba(37,99,235,0.18);
  --glow-light: 0 0 40px rgba(96,165,250,0.14);

  /* Typography */
  --font-heading: 'Space Grotesk', ui-sans-serif, system-ui, -apple-system, sans-serif;
  --font-body: 'Inter', ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.875rem;
  --text-4xl: clamp(2.25rem, 5vw, 3.5rem);

  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 40px;
  --space-2xl: 64px;
  --space-3xl: 100px;

  /* Layout */
  --max-width: 1140px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 999px;

  /* Transitions */
  --ease-out-cubic: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --duration-fast: 150ms;
  --duration-normal: 300ms;
  --duration-slow: 500ms;
}

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; }
html, body { height: 100%; }

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--text-primary);
  background: var(--bg-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: inherit; }

.wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* Noise texture overlay */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9999;
  opacity: 0.03;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 256px 256px;
}

/* --- Typography --- */
h1, h2, h3 {
  font-family: var(--font-heading);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

h1 {
  margin: 14px 0 10px;
  font-size: var(--text-4xl);
  font-weight: 700;
  line-height: 1.06;
}

h2 {
  font-size: var(--text-2xl);
  font-weight: 600;
}

h3 {
  font-size: var(--text-lg);
  font-weight: 600;
}

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

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 22px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-default);
  text-decoration: none;
  font-family: var(--font-body);
  font-weight: 650;
  font-size: var(--text-sm);
  white-space: nowrap;
  cursor: pointer;
  transition:
    transform 0.2s var(--ease-out-cubic),
    box-shadow var(--duration-normal) ease,
    background var(--duration-normal) ease,
    border-color var(--duration-normal) ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn.primary {
  background: var(--gradient-primary);
  background-size: 200% 200%;
  color: #fff;
  border-color: transparent;
  animation: gradientShift 4s ease infinite;
}

.btn.primary:hover {
  background: var(--gradient-primary-hover);
  background-size: 200% 200%;
  box-shadow: 0 8px 30px rgba(37,99,235,0.30);
  animation: gradientShift 4s ease infinite;
}

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

.btn.ghost:hover {
  border-color: var(--border-accent);
  box-shadow: var(--glow-accent);
}

@keyframes gradientShift {
  0%   { background-position: 0% 50%; }
  50%  { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

/* --- Pill Badge --- */
.pill {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 16px;
  border-radius: var(--radius-full);
  background: var(--bg-secondary);
  color: var(--text-secondary);
  font-weight: 600;
  font-size: var(--text-xs);
  position: relative;
  isolation: isolate;
}

.pill::before {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  background: var(--gradient-primary);
  z-index: -1;
  mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  mask-composite: exclude;
  -webkit-mask-composite: xor;
  padding: 1px;
}

/* --- Header --- */
header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(10, 10, 15, 0.80);
  backdrop-filter: saturate(120%) blur(20px);
  -webkit-backdrop-filter: saturate(120%) blur(20px);
  border-bottom: 1px solid var(--border-subtle);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.brand img {
  height: 34px;
  width: auto;
  filter: drop-shadow(0 0 12px rgba(147,180,223,0.3));
}

.navlinks {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--text-secondary);
  font-weight: 600;
}

.navlinks a {
  text-decoration: none;
  padding: 8px 14px;
  border-radius: var(--radius-md);
  transition: color 0.2s ease, background 0.2s ease;
}

.navlinks a:hover {
  background: rgba(37,99,235,0.12);
  color: var(--text-primary);
}

.navcta {
  display: flex;
  align-items: center;
  gap: 10px;
}

.menuBtn {
  display: none;
  border: 1px solid var(--border-default);
  background: transparent;
  color: var(--text-primary);
  border-radius: var(--radius-md);
  padding: 10px 14px;
  font-weight: 700;
  font-family: var(--font-body);
  cursor: pointer;
  transition: border-color 0.2s ease;
}

.menuBtn:hover {
  border-color: var(--border-accent);
}

/* --- Hero --- */
.hero {
  position: relative;
  padding: 80px 0 70px;
  overflow: hidden;
  text-align: center;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 600px 400px at 20% 30%, rgba(29,67,156,0.22), transparent 70%),
    radial-gradient(ellipse 500px 350px at 75% 60%, rgba(96,165,250,0.14), transparent 60%),
    radial-gradient(ellipse 800px 300px at 50% 0%, rgba(59,130,246,0.10), transparent 50%);
  animation: meshFloat 20s ease-in-out infinite alternate;
  pointer-events: none;
}

@keyframes meshFloat {
  0%   { transform: translate(0, 0) scale(1); }
  50%  { transform: translate(-20px, 10px) scale(1.05); }
  100% { transform: translate(15px, -5px) scale(0.98); }
}

.heroContent {
  position: relative;
  z-index: 1;
  max-width: 800px;
  margin: 0 auto;
}

.hero .sub {
  margin: 0 auto;
  color: var(--text-secondary);
  font-size: clamp(16px, 1.3vw, 18px);
  max-width: 60ch;
}

.heroActions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
  justify-content: center;
}

/* KPI Cards */
.kpis {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 48px;
  position: relative;
  z-index: 1;
}

.kpi {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 20px;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  text-align: left;
  transition: border-color var(--duration-normal) ease, box-shadow var(--duration-normal) ease;
}

.kpi:hover {
  border-color: var(--border-accent);
  box-shadow: var(--glow-accent);
}

.kpi strong {
  display: block;
  font-size: var(--text-sm);
  font-family: var(--font-heading);
  color: var(--text-primary);
}

.kpi span {
  display: block;
  color: var(--text-secondary);
  font-size: var(--text-xs);
  margin-top: 4px;
}

/* --- Generic Card --- */
.card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.card h3 {
  margin: 0 0 8px;
  font-size: var(--text-lg);
}

.card p {
  margin: 0;
  color: var(--text-secondary);
  font-size: var(--text-sm);
}

/* --- Sections --- */
section {
  padding: 64px 0;
}

.sectionHead {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 24px;
}

.sectionHead h2 {
  margin: 0;
  font-size: clamp(22px, 2.4vw, 30px);
  letter-spacing: -0.01em;
}

.sectionHead p {
  margin: 4px 0 0;
  color: var(--text-secondary);
  max-width: 70ch;
}

/* --- Services Grid --- */
.grid3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.service {
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 24px;
  position: relative;
  transition:
    transform 0.3s var(--ease-out-cubic),
    border-color var(--duration-normal) ease,
    box-shadow var(--duration-normal) ease;
}

.service::before {
  content: '';
  position: absolute;
  top: 0;
  left: 20px;
  right: 20px;
  height: 2px;
  background: var(--gradient-primary);
  border-radius: 2px;
  opacity: 0;
  transition: opacity var(--duration-normal) ease;
}

.service:hover {
  transform: translateY(-4px);
  border-color: var(--border-accent);
  box-shadow: var(--glow-accent);
}

.service:hover::before {
  opacity: 1;
}

.service h3 {
  margin: 0 0 8px;
  font-size: var(--text-base);
}

.service p {
  margin: 0;
  color: var(--text-secondary);
  font-size: var(--text-sm);
  line-height: 1.6;
}

.tag {
  display: inline-flex;
  margin-top: 12px;
  padding: 6px 12px;
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 650;
  color: var(--accent-light);
  background: rgba(96,165,250,0.12);
  border: 1px solid rgba(96,165,250,0.22);
}

/* --- Steps (How We Work) --- */
.howSection {
  background:
    radial-gradient(ellipse 800px 400px at 50% 0%, rgba(37,99,235,0.10), transparent 70%);
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
  position: relative;
}

/* Connecting line */
.steps::before {
  content: '';
  position: absolute;
  top: 22px;
  left: calc(16.67% + 22px);
  right: calc(16.67% + 22px);
  height: 2px;
  background: linear-gradient(90deg, var(--accent-blue), var(--accent-light));
  opacity: 0.3;
}

.step {
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.step .num {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-primary);
  color: #fff;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 18px;
  position: relative;
  z-index: 1;
  margin-bottom: 14px;
}

.step h3 {
  margin: 0 0 8px;
  font-size: var(--text-base);
}

.step p {
  margin: 0;
  color: var(--text-secondary);
  font-size: var(--text-sm);
  line-height: 1.6;
}

/* --- Split Layout (What We Build) --- */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  align-items: stretch;
}

ul {
  margin: 10px 0 0;
  padding-left: 18px;
}

li {
  margin: 8px 0;
  color: var(--text-secondary);
  font-size: var(--text-sm);
}

li strong {
  color: var(--text-primary);
}

.examples-heading {
  margin: 32px 0 16px;
  font-size: var(--text-xl);
}

.examples-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.example-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-left: 3px solid var(--accent-blue);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition:
    border-color var(--duration-normal) ease,
    box-shadow var(--duration-normal) ease;
}

.example-card:hover {
  border-color: var(--border-accent);
  box-shadow: var(--glow-accent);
}

.example-label {
  display: inline-block;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 650;
  color: var(--accent-light);
  background: rgba(96,165,250,0.12);
  border: 1px solid rgba(96,165,250,0.22);
  margin-bottom: 10px;
}

.example-card h3 {
  margin: 0 0 8px;
  font-size: var(--text-base);
  font-family: var(--font-heading);
}

.example-card p {
  margin: 0;
  color: var(--text-secondary);
  font-size: var(--text-sm);
  line-height: 1.7;
}

/* --- FAQ --- */
.faqSection {
  background:
    radial-gradient(ellipse 600px 300px at 50% 100%, rgba(96,165,250,0.08), transparent 70%);
}

.faq {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

details {
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color var(--duration-normal) ease;
}

details[open] {
  border-color: var(--border-accent);
}

summary {
  cursor: pointer;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: var(--text-base);
  color: var(--text-primary);
  padding: 20px 24px;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: color 0.2s ease;
}

summary::-webkit-details-marker { display: none; }
summary::marker { display: none; }

summary::after {
  content: '+';
  font-size: 24px;
  font-weight: 300;
  color: var(--accent-blue);
  transition: transform var(--duration-normal) ease;
  flex-shrink: 0;
  margin-left: 16px;
  line-height: 1;
}

details[open] summary::after {
  content: '\2212';
}

details .faq-answer {
  padding: 0 24px 20px;
  margin: 0;
  color: var(--text-secondary);
  font-size: var(--text-sm);
  line-height: 1.7;
}

details p {
  margin: 0;
  color: var(--text-secondary);
  font-size: var(--text-sm);
  line-height: 1.7;
}

/* --- CTA Banner (Pre-Footer) --- */
.cta-banner {
  padding: 80px 0;
  position: relative;
  overflow: hidden;
  text-align: center;
}

.cta-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 600px 300px at 50% 50%, rgba(37,99,235,0.16), transparent 70%),
    radial-gradient(ellipse 400px 200px at 30% 70%, rgba(96,165,250,0.10), transparent 60%);
  pointer-events: none;
}

.cta-banner h2 {
  margin: 0 0 8px;
  position: relative;
}

.cta-banner p {
  margin: 0 0 24px;
  color: var(--text-secondary);
  font-size: var(--text-lg);
  position: relative;
}

.cta-banner .heroActions {
  position: relative;
}

/* --- Footer --- */
footer {
  padding: 40px 0 50px;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-subtle);
}

.foot {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
  align-items: flex-start;
}

.foot small {
  color: var(--text-tertiary);
}

.foot strong {
  color: var(--text-primary);
}

.foot a {
  color: var(--accent-blue);
  text-decoration: none;
  font-weight: 700;
  transition: color 0.2s ease;
}

.foot a:hover {
  color: var(--accent-sky);
  text-decoration: underline;
}

.footer-copy {
  margin-top: 20px;
}

.footer-copy small {
  color: var(--text-tertiary);
}

/* --- Focus Visible --- */
:focus-visible {
  outline: 2px solid var(--accent-blue);
  outline-offset: 2px;
}

.btn:focus-visible {
  outline: 2px solid var(--accent-blue);
  outline-offset: 3px;
  box-shadow: var(--glow-accent);
}

/* --- Section-specific action rows --- */
.section-actions {
  margin-top: 24px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

/* --- Responsive --- */

/* Tablet landscape */
@media (max-width: 1024px) {
  .grid3 { grid-template-columns: repeat(2, 1fr); }
  .kpis { grid-template-columns: repeat(2, 1fr); }
}

/* Tablet portrait */
@media (max-width: 768px) {
  .grid3 { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .steps::before { display: none; }
  .split { grid-template-columns: 1fr; }
  .examples-grid { grid-template-columns: 1fr; }
  .kpis { grid-template-columns: repeat(2, 1fr); }
  section { padding: 48px 0; }
  .hero { padding: 60px 0 50px; }

  .navlinks {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(10, 10, 15, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 24px;
    z-index: 100;
  }

  .nav.isOpen .navlinks {
    display: flex;
  }

  .nav.isOpen .navlinks a {
    font-size: var(--text-xl);
    font-family: var(--font-heading);
    padding: 12px 20px;
  }

  .navcta { display: none; }

  .nav.isOpen .navcta {
    display: flex;
    position: fixed;
    bottom: 48px;
    left: 24px;
    right: 24px;
    z-index: 101;
    justify-content: center;
    gap: 12px;
  }

  .menuBtn {
    display: inline-flex;
    z-index: 101;
  }

  .sectionHead {
    flex-direction: column;
    align-items: flex-start;
  }

  body::after { display: none; }
}

/* Phone */
@media (max-width: 480px) {
  .kpis { grid-template-columns: 1fr; }
  h1 { font-size: clamp(28px, 8vw, 36px); }
  .wrap { padding: 0 16px; }
  .cta-banner { padding: 60px 0; }
  .heroActions { flex-direction: column; align-items: center; }
  .section-actions { flex-direction: column; }
}

/* --- Reduced Motion --- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  [data-aos] {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
}

/* --- Privacy Page Specific --- */
.privacy-main {
  padding: 40px 0 70px;
}

.privacy-main h1 {
  font-size: clamp(28px, 4vw, 40px);
}

.privacy-main .sub {
  margin: 0 0 24px;
  color: var(--text-secondary);
}

.privacy-main section {
  padding: 0;
  margin-top: 32px;
}

.privacy-main h2 {
  margin: 0 0 8px;
  font-size: var(--text-xl);
}

.privacy-main p {
  margin: 8px 0;
  color: var(--text-secondary);
  line-height: 1.7;
}

.privacy-main a {
  color: var(--accent-blue);
  text-decoration: none;
  font-weight: 600;
  transition: color 0.2s ease;
}

.privacy-main a:hover {
  color: var(--accent-sky);
  text-decoration: underline;
}