/* =========================================================
   Quantix — Marketing Website Styles
   1. Reset / normalize
   2. CSS variables (:root)
   3. Base typography
   4. Layout primitives
   5. Components
   6. Page-specific blocks
   7. Responsive overrides
   8. Utility classes
   ========================================================= */

/* ---------- 1. Reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body,
h1, h2, h3, h4, h5, h6,
p, ul, ol, figure, blockquote { margin: 0; }

ul, ol { padding: 0; list-style: none; }

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

a { color: inherit; text-decoration: none; }

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
}

input, textarea, select {
  font: inherit;
  color: inherit;
}

/* ---------- 2. Variables ---------- */
:root {
  --bg: #ffffff;
  --bg-alt: #f7f8fa;
  --bg-deep: #0a0c10;
  --text: #0a0c10;
  --text-muted: #5b6470;
  --text-soft: #8b94a3;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --accent-soft: rgba(37, 99, 235, 0.08);
  --border: #e6e8ec;
  --border-strong: #d4d8de;
  --success: #10b981;

  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 20px;

  --shadow-sm: 0 1px 2px rgba(10, 12, 16, 0.04);
  --shadow: 0 6px 24px rgba(10, 12, 16, 0.06);
  --shadow-lg: 0 18px 48px rgba(10, 12, 16, 0.10);

  --container: 1200px;
  --gutter: 24px;
  --header-h: 68px;

  --font-sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --ease: cubic-bezier(.2,.6,.2,1);
}

/* ---------- 3. Typography ---------- */
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4 {
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--text);
}

h1 { font-size: clamp(36px, 7vw, 60px); }
h2 { font-size: clamp(28px, 4.4vw, 40px); }
h3 { font-size: clamp(20px, 2.4vw, 22px); letter-spacing: -0.01em; }
h4 { font-size: 18px; letter-spacing: -0.01em; }

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

.lead {
  font-size: clamp(17px, 2.2vw, 20px);
  line-height: 1.55;
  color: var(--text-muted);
}

.eyebrow {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  padding: 6px 12px;
  background: var(--accent-soft);
  border-radius: 999px;
}

/* ---------- 4. Layout primitives ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.section {
  padding: 64px 0;
}

.section--tight { padding: 48px 0; }
.section--alt { background: var(--bg-alt); }

.grid {
  display: grid;
  gap: 20px;
}

.grid--2 { grid-template-columns: 1fr; }
.grid--3 { grid-template-columns: 1fr; }
.grid--5 { grid-template-columns: 1fr; }

/* ---------- 5. Components ---------- */

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 22px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  transition: background-color .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease), transform .2s var(--ease);
  white-space: nowrap;
}

.btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.btn--primary {
  background: var(--accent);
  color: #fff;
}
.btn--primary:hover { background: var(--accent-hover); }

.btn--secondary {
  border-color: var(--border-strong);
  color: var(--text);
  background: #fff;
}
.btn--secondary:hover { border-color: var(--text); }

.btn--ghost {
  color: var(--accent);
  padding-left: 0;
  padding-right: 0;
}
.btn--ghost:hover { color: var(--accent-hover); }

.btn--lg { padding: 16px 26px; font-size: 16px; }

.btn .arrow { transition: transform .2s var(--ease); }
.btn:hover .arrow { transform: translateX(3px); }

/* Card */
.card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: border-color .2s var(--ease), transform .2s var(--ease), box-shadow .2s var(--ease);
}
.card:hover {
  border-color: var(--border-strong);
  box-shadow: var(--shadow);
}
.card h3 { margin-bottom: 10px; }
.card p { font-size: 15px; }

.card__icon {
  width: 44px;
  height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  background: var(--accent-soft);
  color: var(--accent);
  margin-bottom: 18px;
}
.card__icon svg { width: 22px; height: 22px; }

/* Header */
.header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: saturate(180%) blur(10px);
  -webkit-backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color .2s var(--ease), box-shadow .2s var(--ease);
}
.header.scrolled {
  border-bottom-color: var(--border);
  box-shadow: var(--shadow-sm);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
}

.brand { display: inline-flex; align-items: center; }
.brand img { height: 26px; width: auto; }

.nav {
  display: none;
  align-items: center;
  gap: 28px;
}
.nav a {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-muted);
  transition: color .15s var(--ease);
}
.nav a:hover { color: var(--text); }
.nav a.is-active { color: var(--text); }

.header__cta { display: none; }

.burger {
  width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: #fff;
}
.burger:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.burger span,
.burger span::before,
.burger span::after {
  content: "";
  display: block;
  width: 18px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform .25s var(--ease), top .25s var(--ease), opacity .15s var(--ease);
}
.burger span { position: relative; }
.burger span::before { position: absolute; top: -6px; left: 0; }
.burger span::after  { position: absolute; top:  6px; left: 0; }

body.menu-open .burger span { background: transparent; }
body.menu-open .burger span::before { top: 0; transform: rotate(45deg); }
body.menu-open .burger span::after  { top: 0; transform: rotate(-45deg); }

/* Mobile overlay menu */
.mobile-menu {
  position: fixed;
  inset: var(--header-h) 0 0 0;
  background: #fff;
  transform: translateY(-8px);
  opacity: 0;
  pointer-events: none;
  transition: opacity .2s var(--ease), transform .2s var(--ease);
  z-index: 40;
  display: flex;
  flex-direction: column;
  padding: 24px var(--gutter) 40px;
}
body.menu-open .mobile-menu {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}
.mobile-menu a:not(.btn) {
  display: block;
  padding: 16px 0;
  font-size: 22px;
  font-weight: 600;
  color: var(--text);
  border-bottom: 1px solid var(--border);
}
.mobile-menu .btn {
  margin-top: 24px;
  align-self: flex-start;
  font-size: 16px;
}
.mobile-menu .btn--primary { color: #fff; }

/* Footer */
.footer {
  background: var(--bg-deep);
  color: #c7ccd6;
  padding: 56px 0 32px;
  margin-top: 64px;
}
.footer h4 { color: #fff; margin-bottom: 14px; }
.footer__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}
.footer__brand p {
  color: #8b94a3;
  font-size: 14px;
  max-width: 340px;
  margin-top: 14px;
}
.footer__brand .brand img { filter: brightness(0) invert(1); height: 26px; }
.footer__col ul li { padding: 6px 0; font-size: 14px; }
.footer__col a { color: #c7ccd6; transition: color .15s var(--ease); }
.footer__col a:hover { color: #fff; }
.footer__bottom {
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,0.08);
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 13px;
  color: #8b94a3;
}

/* ---------- 6. Page-specific blocks ---------- */

/* Hero */
.hero {
  padding: 72px 0 56px;
  position: relative;
  overflow: hidden;
}
.hero::after {
  content: "";
  position: absolute;
  inset: -20% -20% auto auto;
  width: 540px;
  height: 540px;
  background: radial-gradient(closest-side, var(--accent-soft), transparent 70%);
  pointer-events: none;
  z-index: -1;
}
.hero__eyebrow { margin-bottom: 20px; }
.hero h1 { margin-bottom: 22px; max-width: 18ch; }
.hero .lead { max-width: 60ch; margin-bottom: 32px; }
.hero__cta { display: flex; flex-wrap: wrap; gap: 12px; }

.page-hero {
  padding: 56px 0 24px;
  border-bottom: 1px solid var(--border);
}
.page-hero .eyebrow { margin-bottom: 16px; }
.page-hero h1 { margin-bottom: 16px; max-width: 20ch; }
.page-hero .lead { max-width: 64ch; }

/* Section heading block */
.section__head {
  max-width: 720px;
  margin-bottom: 40px;
}
.section__head .eyebrow { margin-bottom: 14px; }
.section__head h2 { margin-bottom: 14px; }

/* Services teaser/grid */
.services-grid { display: grid; grid-template-columns: 1fr; gap: 16px; }

/* Positioning block */
.positioning {
  background: var(--bg-deep);
  color: #fff;
  border-radius: var(--radius-lg);
  padding: 56px 28px;
  text-align: center;
}
.positioning .eyebrow {
  background: rgba(255,255,255,0.08);
  color: #fff;
}
.positioning h2 { color: #fff; margin: 16px 0; }
.positioning p { color: #c7ccd6; max-width: 60ch; margin: 0 auto; font-size: 17px; }

/* CTA banner */
.cta-banner {
  background: var(--accent);
  color: #fff;
  border-radius: var(--radius-lg);
  padding: 48px 28px;
  text-align: center;
}
.cta-banner h2 { color: #fff; margin-bottom: 12px; }
.cta-banner p { color: rgba(255,255,255,0.85); margin-bottom: 24px; max-width: 56ch; margin-left: auto; margin-right: auto; }
.cta-banner .btn--secondary {
  background: #fff;
  color: var(--accent);
  border-color: #fff;
}
.cta-banner .btn--secondary:hover { background: #f1f5ff; }

/* Brief about */
.brief {
  display: grid;
  gap: 24px;
  grid-template-columns: 1fr;
  align-items: center;
}
.brief__copy h2 { margin-bottom: 14px; }
.brief__copy p { margin-bottom: 16px; font-size: 17px; }
.brief__stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.stat {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
}
.stat strong {
  display: block;
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.02em;
}
.stat span { font-size: 13px; color: var(--text-muted); }

/* About — Mission / Vision */
.statement {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 28px;
  background: #fff;
  position: relative;
}
.statement--accent {
  background: linear-gradient(180deg, var(--accent-soft), #fff);
  border-color: rgba(37, 99, 235, 0.18);
}
.statement .eyebrow { margin-bottom: 12px; }
.statement h2 { margin-bottom: 14px; }
.statement p { font-size: 17px; max-width: 64ch; }

.statement-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

/* Principles list */
.principles { display: grid; gap: 16px; grid-template-columns: 1fr; }
.principle {
  display: flex;
  gap: 16px;
  padding: 22px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: #fff;
}
.principle__num {
  flex: 0 0 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--accent-soft);
  color: var(--accent);
  font-family: var(--font-mono);
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
}
.principle h3 { font-size: 17px; margin-bottom: 4px; }
.principle p { font-size: 14px; margin: 0; }

/* Approach timeline */
.approach { display: grid; grid-template-columns: 1fr; gap: 16px; counter-reset: step; }
.step {
  position: relative;
  padding: 28px 24px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: #fff;
  counter-increment: step;
}
.step::before {
  content: "0" counter(step);
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.05em;
  margin-bottom: 10px;
}
.step h3 { margin-bottom: 8px; }
.step p { font-size: 15px; margin: 0; }

/* Why us */
.why-list {
  display: grid;
  gap: 14px;
  grid-template-columns: 1fr;
}
.why-list li {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 18px 20px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: #fff;
  font-weight: 500;
  color: var(--text);
}
.why-list svg {
  flex: 0 0 22px;
  width: 22px;
  height: 22px;
  color: var(--success);
  margin-top: 1px;
}

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}
.contact-info p { margin-bottom: 18px; font-size: 17px; }
.info-line {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 18px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 12px;
}
.info-line svg {
  width: 20px; height: 20px;
  color: var(--accent);
  flex: 0 0 20px;
}
.info-line strong { display: block; font-size: 13px; color: var(--text-muted); font-weight: 500; }
.info-line a, .info-line span { font-size: 16px; color: var(--text); font-weight: 600; }
.info-line a:hover { color: var(--accent); }

.contact-form {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  background: #fff;
  display: grid;
  gap: 16px;
}
.field { display: grid; gap: 6px; }
.field label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
}
.field input,
.field textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: #fff;
  font-size: 15px;
  transition: border-color .15s var(--ease), box-shadow .15s var(--ease);
}
.field input:focus,
.field textarea:focus {
  outline: 0;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.field textarea { resize: vertical; min-height: 120px; }
.form-note { font-size: 12px; color: var(--text-soft); }

/* ---------- 7. Responsive ---------- */
@media (min-width: 600px) {
  .services-grid { grid-template-columns: 1fr 1fr; }
  .principles { grid-template-columns: 1fr 1fr; }
  .why-list { grid-template-columns: 1fr 1fr; }
}

@media (min-width: 768px) {
  :root { --gutter: 32px; }
  .section { padding: 80px 0; }
  .grid--2 { grid-template-columns: 1fr 1fr; }
  .grid--3 { grid-template-columns: repeat(3, 1fr); }

  .brief { grid-template-columns: 1.1fr 1fr; gap: 48px; }
  .brief__stats { grid-template-columns: 1fr 1fr; }

  .statement-grid { grid-template-columns: 1fr 1fr; }
  .approach { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr 1fr; }
  .footer__grid { grid-template-columns: 1.4fr 1fr 1fr; gap: 48px; }
  .positioning { padding: 72px 48px; }
  .cta-banner { padding: 64px 40px; }
}

@media (min-width: 1024px) {
  :root { --gutter: 40px; --header-h: 76px; }
  .section { padding: 96px 0; }
  .hero { padding: 96px 0 80px; }
  .page-hero { padding: 80px 0 32px; }

  .nav { display: inline-flex; }
  .header__cta { display: inline-flex; }
  .burger { display: none; }

  .services-grid { grid-template-columns: repeat(3, 1fr); }
  .services-grid--5 > :nth-child(4),
  .services-grid--5 > :nth-child(5) { grid-column: span 1; }
  .principles { grid-template-columns: repeat(3, 1fr); }
  .approach { grid-template-columns: repeat(4, 1fr); }
  .why-list { grid-template-columns: repeat(3, 1fr); }
  .footer__grid { grid-template-columns: 1.6fr 1fr 1fr 1fr; }
}

/* ---------- 8. Utilities ---------- */
.text-center { text-align: center; }
.mx-auto { margin-left: auto; margin-right: auto; }
.mt-24 { margin-top: 24px; }
.mt-32 { margin-top: 32px; }
.mt-40 { margin-top: 40px; }
.muted { color: var(--text-muted); }
.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;
}

/* Respect reduced motion */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; animation: none !important; }
}