/* ==========================================================================
   IKSORA AI — Design System
   ========================================================================== */

:root {
  /* Colors */
  --c-bg: #0a0b0d;
  --c-bg-alt: #0f1114;
  --c-surface: #131519;
  --c-border: rgba(255, 255, 255, 0.08);
  --c-border-strong: rgba(255, 255, 255, 0.16);
  --c-text: #f5f4f1;
  --c-text-muted: #a3a5ab;
  --c-text-faint: #6b6d74;
  --c-accent: #7fe0c4;      /* sophisticated muted teal/mint */
  --c-accent-dim: #4f8f7d;
  --c-accent-contrast: #06110d;

  /* Typography */
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-display: 'Space Grotesk', 'Inter', -apple-system, sans-serif;

  /* Spacing */
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2rem;
  --space-5: 3rem;
  --space-6: 4rem;
  --space-7: 6rem;
  --space-8: 9rem;

  /* Layout */
  --container-max: 1240px;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;

  /* Motion */
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --dur-fast: 180ms;
  --dur-mid: 400ms;
  --dur-slow: 800ms;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--c-bg);
  color: var(--c-text);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; margin: 0; padding: 0; }
button { font-family: inherit; cursor: pointer; }
h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 600; margin: 0; letter-spacing: -0.02em; }
p { margin: 0; }

/* Subtle grain overlay for premium texture */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 9999;
  pointer-events: none;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-4);
}

.eyebrow {
  font-family: var(--font-display);
  font-size: 0.8rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-accent);
  margin: 0 0 var(--space-2);
}

.text-accent { color: var(--c-accent); }

/* ---------- Focus states ---------- */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--c-accent);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.6rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  transition: transform var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
  will-change: transform;
}
.btn--primary {
  background: var(--c-accent);
  color: var(--c-accent-contrast);
}
.btn--primary:hover { transform: translateY(-2px); background: #96e8d1; }
.btn--ghost {
  background: transparent;
  border-color: var(--c-border-strong);
  color: var(--c-text);
}
.btn--ghost:hover { border-color: var(--c-accent); color: var(--c-accent); transform: translateY(-2px); }
.btn--sm { padding: 0.55rem 1.2rem; font-size: 0.85rem; }
.btn--lg { padding: 1rem 2rem; font-size: 1rem; }
.btn--block { width: 100%; }

/* ---------- Navbar ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  width: 100%;
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background var(--dur-mid) var(--ease), border-color var(--dur-mid) var(--ease), backdrop-filter var(--dur-mid) var(--ease);
}
.nav.is-scrolled {
  background: rgba(10, 11, 13, 0.8);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom-color: var(--c-border);
}
.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem var(--space-4);
  gap: var(--space-4);
}
.nav__logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.04em;
}
.nav__logo-mark {
  width: 10px;
  height: 10px;
  border-radius: 2px;
  background: var(--c-accent);
  display: inline-block;
}
.nav__logo-accent { color: var(--c-accent); }
.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-left: auto;
}
.nav__link {
  font-size: 0.92rem;
  color: var(--c-text-muted);
  position: relative;
  padding: 0.25rem 0;
  transition: color var(--dur-fast) var(--ease);
}
.nav__link::after {
  content: "";
  position: absolute;
  left: 0; bottom: -2px;
  width: 0; height: 1px;
  background: var(--c-accent);
  transition: width var(--dur-fast) var(--ease);
}
.nav__link:hover, .nav__link.is-active { color: var(--c-text); }
.nav__link:hover::after, .nav__link.is-active::after { width: 100%; }
.nav__cta { margin-left: var(--space-3); }
.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  padding: 6px;
}
.nav__toggle span {
  width: 22px;
  height: 2px;
  background: var(--c-text);
  transition: transform var(--dur-fast) var(--ease), opacity var(--dur-fast) var(--ease);
}
.nav__toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav__toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.mobile-menu {
  display: none;
  flex-direction: column;
  gap: var(--space-4);
  padding: var(--space-4);
  background: var(--c-bg-alt);
  border-top: 1px solid var(--c-border);
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--dur-mid) var(--ease);
}
.mobile-menu.is-open { max-height: 480px; }
.mobile-menu__links { display: flex; flex-direction: column; gap: var(--space-3); }
.mobile-menu__links a { font-size: 1.1rem; color: var(--c-text-muted); }
.mobile-menu__links a.is-active { color: var(--c-accent); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: center;
  padding: var(--space-7) 0 var(--space-6);
  overflow: hidden;
}
.hero__bg { position: absolute; inset: 0; z-index: 0; }
.hero__grid { position: absolute; inset: 0; width: 100%; height: 100%; opacity: 0.5; }
.hero__orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.28;
}
.hero__orb--1 {
  width: 480px; height: 480px;
  background: var(--c-accent);
  top: -120px; right: -80px;
  animation: floatSlow 14s ease-in-out infinite;
}
.hero__orb--2 {
  width: 360px; height: 360px;
  background: var(--c-accent-dim);
  bottom: -140px; left: -60px;
  animation: floatSlow 18s ease-in-out infinite reverse;
}
@keyframes floatSlow {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(30px, 20px); }
}
.hero__nodes { position: absolute; top: 0; right: 0; width: min(50vw, 800px); height: 100%; opacity: 0.7; }
.hero__nodes .node { fill: var(--c-accent); }
.hero__nodes .edge { stroke: var(--c-border-strong); stroke-width: 1; }
.node-group { animation: drift 10s ease-in-out infinite; }
@keyframes drift {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-14px); }
}
.hero__inner { position: relative; z-index: 1; max-width: 780px; }
.hero__title {
  font-size: clamp(2.6rem, 6.5vw, 5.2rem);
  line-height: 1.04;
  margin: 0 0 var(--space-3);
}
.hero__sub {
  font-size: clamp(1rem, 1.6vw, 1.2rem);
  color: var(--c-text-muted);
  max-width: 56ch;
  margin-bottom: var(--space-4);
}
.hero__actions { display: flex; gap: var(--space-3); flex-wrap: wrap; }

.scroll-cue {
  position: absolute;
  bottom: var(--space-4);
  left: 50%;
  transform: translateX(-50%);
  width: 24px; height: 40px;
  border: 1px solid var(--c-border-strong);
  border-radius: 20px;
  z-index: 1;
}
.scroll-cue span {
  display: block;
  width: 4px; height: 8px;
  background: var(--c-accent);
  border-radius: 2px;
  margin: 6px auto 0;
  animation: scrollCue 1.8s ease-in-out infinite;
}
@keyframes scrollCue {
  0% { transform: translateY(0); opacity: 1; }
  70% { transform: translateY(14px); opacity: 0; }
  100% { transform: translateY(0); opacity: 0; }
}

/* ---------- Tech strip ---------- */
.tech-strip {
  border-top: 1px solid var(--c-border);
  border-bottom: 1px solid var(--c-border);
  padding: var(--space-3) 0;
  overflow: hidden;
}
.tech-strip__track {
  display: flex;
  gap: var(--space-3);
  white-space: nowrap;
  color: var(--c-text-faint);
  font-family: var(--font-display);
  font-size: 0.9rem;
  letter-spacing: 0.03em;
  animation: marquee 30s linear infinite;
  width: max-content;
}
.tech-strip__dot { color: var(--c-accent-dim); }
@keyframes marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}
@media (prefers-reduced-motion: reduce) {
  .tech-strip__track { animation: none; }
}

/* ---------- Sections ---------- */
.section { padding: var(--space-7) 0; }
.section--alt { background: var(--c-bg-alt); }
.section__head { max-width: 640px; margin-bottom: var(--space-5); }
.section__title {
  font-size: clamp(1.8rem, 3.2vw, 2.6rem);
  line-height: 1.15;
}

/* ---------- Service list (What We Do) ---------- */
.service-list { border-top: 1px solid var(--c-border); }
.service-row {
  display: grid;
  grid-template-columns: 80px 1fr 40px;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-4) 0;
  border-bottom: 1px solid var(--c-border);
  transition: background var(--dur-fast) var(--ease);
}
.service-row:hover { background: rgba(255,255,255,0.02); }
.service-row__num {
  font-family: var(--font-display);
  color: var(--c-accent-dim);
  font-size: 1.1rem;
}
.service-row__title { font-size: 1.3rem; margin-bottom: 0.35rem; }
.service-row__desc { color: var(--c-text-muted); max-width: 60ch; }
.service-row__arrow {
  font-size: 1.4rem;
  color: var(--c-accent);
  opacity: 0;
  transform: translateX(-6px);
  transition: opacity var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease);
  justify-self: end;
}
.service-row:hover .service-row__arrow { opacity: 1; transform: translateX(0); }

/* ---------- Editorial grid (solutions preview) ---------- */
.editorial-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5) var(--space-4);
}
.editorial-item__mark {
  font-family: var(--font-display);
  color: var(--c-accent-dim);
  font-size: 0.85rem;
  margin-bottom: var(--space-2);
}
.editorial-item__title { font-size: 1.15rem; margin-bottom: 0.5rem; }
.editorial-item__desc { color: var(--c-text-muted); font-size: 0.95rem; }

/* ---------- Process grid ---------- */
.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-3);
}
.process-card {
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  transition: border-color var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease);
}
.process-card:hover { border-color: var(--c-border-strong); transform: translateY(-4px); }
.process-card__num { font-family: var(--font-display); color: var(--c-accent); font-size: 0.9rem; }
.process-card__title { font-size: 1.15rem; margin: var(--space-2) 0 0.5rem; }
.process-card__desc { color: var(--c-text-muted); font-size: 0.92rem; }

/* ---------- Why grid ---------- */
.why-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-4);
}
.why-card {
  padding: var(--space-4) 0;
  border-top: 1px solid var(--c-border);
}
.why-card__title { font-size: 1.1rem; margin-bottom: 0.5rem; }
.why-card__desc { color: var(--c-text-muted); font-size: 0.92rem; }

/* ---------- CTA block ---------- */
.cta-block {
  padding: var(--space-7) 0;
  background: radial-gradient(circle at 50% 0%, rgba(127,224,196,0.10), transparent 60%), var(--c-bg);
  border-top: 1px solid var(--c-border);
  border-bottom: 1px solid var(--c-border);
  text-align: center;
}
.cta-block__title {
  font-size: clamp(1.8rem, 4vw, 3rem);
  margin-bottom: var(--space-2);
}
.cta-block__sub { color: var(--c-text-muted); margin-bottom: var(--space-4); }

/* ---------- Careers teaser ---------- */
.careers-teaser__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
}
.careers-teaser__desc { color: var(--c-text-muted); max-width: 48ch; margin-top: var(--space-2); }

/* ---------- Forms ---------- */
.contact-form { max-width: 720px; display: flex; flex-direction: column; gap: var(--space-3); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-3); }
.field { display: flex; flex-direction: column; gap: 0.4rem; }
.field label { font-size: 0.85rem; color: var(--c-text-muted); }
.field .optional { color: var(--c-text-faint); font-weight: 400; }
.field input, .field textarea {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  padding: 0.8rem 1rem;
  color: var(--c-text);
  font-family: var(--font-body);
  font-size: 0.95rem;
  transition: border-color var(--dur-fast) var(--ease);
  resize: vertical;
}
.field input:focus, .field textarea:focus { border-color: var(--c-accent); }
.form-hint { color: var(--c-text-faint); font-size: 0.85rem; }

.form-state { padding: var(--space-3); border-radius: var(--radius-md); margin-bottom: var(--space-3); }
.form-state--success { background: rgba(127,224,196,0.1); border: 1px solid var(--c-accent-dim); }
.form-state--error { background: rgba(224,127,127,0.08); border: 1px solid rgba(224,127,127,0.4); }
.form-state--error ul { padding-left: 1.2rem; list-style: disc; }

/* ---------- Footer ---------- */
.footer { padding: var(--space-6) 0 var(--space-4); border-top: 1px solid var(--c-border); }
.footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: var(--space-4);
  padding-bottom: var(--space-5);
}
.footer__tagline { color: var(--c-text-muted); margin-top: var(--space-2); }
.footer__col-title { display: block; color: var(--c-text-faint); font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: var(--space-2); }
.footer__nav, .footer__social { display: flex; flex-direction: column; gap: 0.6rem; }
.footer__nav a, .footer__social a { color: var(--c-text-muted); font-size: 0.92rem; }
.footer__nav a:hover, .footer__social a:hover { color: var(--c-accent); }
.footer__bottom {
  border-top: 1px solid var(--c-border);
  padding-top: var(--space-3);
  color: var(--c-text-faint);
  font-size: 0.85rem;
}

/* ---------- Page hero (inner pages) ---------- */
.page-hero { padding: var(--space-7) 0 var(--space-5); }
.page-hero__title { font-size: clamp(2.2rem, 5vw, 3.6rem); max-width: 900px; }
.page-hero__sub { color: var(--c-text-muted); max-width: 60ch; margin-top: var(--space-3); font-size: 1.05rem; }

/* ---------- Editorial layout (About) ---------- */
.editorial__grid { display: grid; grid-template-columns: 1fr 2fr; gap: var(--space-5); }
.editorial__body p { color: var(--c-text-muted); max-width: 70ch; margin-bottom: var(--space-3); font-size: 1.05rem; }
.editorial__body p:last-child { margin-bottom: 0; }

/* ---------- Solutions page ---------- */
.solutions-list { display: flex; flex-direction: column; }
.solution-block {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: var(--space-4);
  padding: var(--space-5) 0;
  border-top: 1px solid var(--c-border);
}
.solution-block:last-child { border-bottom: 1px solid var(--c-border); }
.solution-block__index { font-family: var(--font-display); font-size: 1.5rem; color: var(--c-accent-dim); }
.solution-block__title { font-size: 1.6rem; margin-bottom: var(--space-3); }
.solution-block__grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-3) var(--space-4); }
.solution-block__label { display: block; font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--c-text-faint); margin-bottom: 0.3rem; }
.solution-block__grid p { color: var(--c-text-muted); font-size: 0.95rem; }

/* ---------- Careers page ---------- */
.notice { color: var(--c-text-faint); font-size: 0.9rem; margin-top: var(--space-2); }
.positions-list { border-top: 1px solid var(--c-border); }
.position-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-4) 0;
  border-bottom: 1px solid var(--c-border);
  flex-wrap: wrap;
}
.position-row__title { font-size: 1.15rem; margin-bottom: 0.3rem; }
.position-row__summary { color: var(--c-text-muted); font-size: 0.92rem; max-width: 60ch; }
.position-row__meta { display: flex; gap: var(--space-3); color: var(--c-text-faint); font-size: 0.85rem; white-space: nowrap; }

/* ---------- Contact page ---------- */
.contact-layout { display: grid; grid-template-columns: 1fr 2fr; gap: var(--space-6); }
.contact-info__title { font-size: 1.6rem; margin-bottom: var(--space-2); }
.contact-info__desc { color: var(--c-text-muted); margin-bottom: var(--space-3); max-width: 40ch; }
.contact-info__email { color: var(--c-accent); font-weight: 600; }

/* ---------- Error / 404 pages ---------- */
.error-page { padding: var(--space-8) 0; text-align: center; }
.error-page__inner { display: flex; flex-direction: column; align-items: center; gap: var(--space-2); }
.error-page__title { font-size: clamp(1.8rem, 4vw, 2.6rem); margin-top: var(--space-1); }
.error-page__desc { color: var(--c-text-muted); max-width: 50ch; margin-bottom: var(--space-3); }
.error-page__stack {
  text-align: left;
  max-width: 100%;
  overflow-x: auto;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  padding: var(--space-3);
  font-size: 0.8rem;
  color: var(--c-text-faint);
}

/* ---------- Scroll reveal ---------- */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity var(--dur-slow) var(--ease), transform var(--dur-slow) var(--ease);
}
.reveal.is-visible { opacity: 1; transform: translateY(0); }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .hero__orb, .node-group, .scroll-cue span { animation: none; }
  * { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
}