/* ===================================================================
   dataconiq — 3-Color Palette
   Primary:  #0B1D35 (deep navy)
   Accent:   #00BFA6 (teal)
   Surface:  #FFFFFF (white) with #F6F8FA (off-white tint)
   =================================================================== */

:root {
  --color-primary: #0B1D35;
  --color-accent: #00BFA6;
  --color-surface: #FFFFFF;
  --color-bg-tint: #F6F8FA;

  --color-text: #0B1D35;
  --color-text-muted: #4A5568;
  --color-text-light: #8896A6;
  --color-border: #E2E8F0;

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --container-max: 1140px;
  --section-padding: 120px;
  --radius: 12px;
  --radius-sm: 8px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-surface);
  overflow-x: hidden;
}

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

ul { list-style: none; }
img { max-width: 100%; display: block; }

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

/* ——— Section Labels & Titles ——— */
.section__label {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 12px;
}

.section__title {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-primary);
  margin-bottom: 48px;
  max-width: 600px;
}

/* ——— Buttons ——— */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 32px;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  border: 2px solid transparent;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}

.btn--primary {
  background: var(--color-accent);
  color: var(--color-primary);
  border-color: var(--color-accent);
}

.btn--primary:hover {
  background: #00A892;
  border-color: #00A892;
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(0, 191, 166, 0.3);
}

.btn--outline {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-border);
}

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

.btn--full { width: 100%; }

/* ——— Navigation ——— */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 28px 0;
  transition: var(--transition);
}

.nav--scrolled {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  padding: 20px 0;
  box-shadow: 0 1px 0 var(--color-border);
}

.nav__container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav__logo {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--color-primary);
  display: flex;
  align-items: center;
  gap: 12px;
  letter-spacing: -0.02em;
}

.nav__logo-symbol {
  width: 50px;
  height: auto;
  display: block;
  --logo-primary: var(--color-primary);
  --logo-accent: var(--color-accent);
}

.nav__logo-symbol .logo-primary {
  stroke: var(--logo-primary);
}

.nav__logo-symbol .logo-accent {
  stroke: var(--logo-accent);
}

.nav__logo-symbol .logo-ring {
  stroke: var(--logo-primary);
  fill: var(--color-surface);
}

.nav__logo-text {
  display: inline-block;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 40px;
}

.nav__links a {
  font-size: 0.98rem;
  font-weight: 450;
  color: var(--color-text-muted);
  transition: var(--transition);
  position: relative;
}

.nav__links a:hover {
  color: var(--color-primary);
}

.nav__links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: var(--transition);
}

.nav__links a:hover::after {
  width: 100%;
}

.nav__cta {
  background: var(--color-accent);
  color: var(--color-primary) !important;
  padding: 10px 24px;
  border-radius: var(--radius-sm);
  font-weight: 500 !important;
}

.nav__cta::after { display: none !important; }

.nav__cta:hover {
  background: #00A892;
  transform: translateY(-1px);
}

.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav__toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-primary);
  transition: var(--transition);
}

/* ——— Hero ——— */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 80px;
  background: var(--color-surface);
  position: relative;
  overflow: hidden;
}

.hero__container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  width: 100%;
}

.hero__label {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 20px;
}

.hero__title {
  font-size: clamp(2.4rem, 5vw, 3.6rem);
  font-weight: 700;
  line-height: 1.1;
  color: var(--color-primary);
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}

.hero__title-accent {
  color: var(--color-accent);
  display: inline;
}

.hero__subtitle {
  font-size: 1.1rem;
  line-height: 1.7;
  color: var(--color-text-muted);
  max-width: 480px;
  margin-bottom: 36px;
}

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

.hero__visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero__graphic {
  width: 100%;
  max-width: 400px;
}

.hero__svg {
  width: 100%;
  height: auto;
}

.node {
  animation: pulse 3s ease-in-out infinite;
}

.node--1 { animation-delay: 0s; }
.node--2 { animation-delay: 0.5s; }
.node--3 { animation-delay: 1s; }
.node--4 { animation-delay: 1.5s; }
.node--5 { animation-delay: 2s; }
.node--center { animation: pulseBig 2s ease-in-out infinite; }

.connection {
  animation: fadeConnection 3s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 0.6; r: 5; }
  50% { opacity: 1; r: 7; }
}

@keyframes pulseBig {
  0%, 100% { opacity: 0.8; r: 10; }
  50% { opacity: 1; r: 13; }
}

@keyframes fadeConnection {
  0%, 100% { opacity: 0.2; }
  50% { opacity: 0.5; }
}

/* ——— Services ——— */
.services {
  padding: var(--section-padding) 0;
  background: var(--color-bg-tint);
}

.services__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.service-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 40px 32px;
  transition: var(--transition);
  position: relative;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--color-accent);
  border-radius: var(--radius) var(--radius) 0 0;
  opacity: 0;
  transition: var(--transition);
}

.service-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(11, 29, 53, 0.08);
}

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

.service-card__icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 191, 166, 0.08);
  border-radius: var(--radius-sm);
  margin-bottom: 24px;
}

.service-card__title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.service-card__desc {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: 20px;
}

.service-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.service-card__tags li {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  padding: 4px 12px;
  background: var(--color-bg-tint);
  border-radius: 100px;
  color: var(--color-text-muted);
  letter-spacing: 0.02em;
}

/* ——— About ——— */
.about {
  padding: var(--section-padding) 0;
  background: var(--color-surface);
}

.about__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.about__text {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  margin-bottom: 20px;
  line-height: 1.8;
}

.about__stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}

.stat {
  text-align: center;
  padding: 32px 20px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  transition: var(--transition);
}

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

.stat__number {
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--color-accent);
  display: inline;
  font-variant-numeric: tabular-nums;
}

.stat__suffix {
  font-size: 1.6rem;
  font-weight: 600;
  color: var(--color-accent);
}

.stat__label {
  display: block;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-top: 4px;
  font-weight: 450;
}

/* ——— Approach ——— */
.approach {
  padding: var(--section-padding) 0;
  background: var(--color-primary);
}

.approach .section__label {
  color: var(--color-accent);
}

.approach .section__title {
  color: var(--color-surface);
}

.approach__steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}

.step {
  padding: 32px 24px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius);
  transition: var(--transition);
}

.step:hover {
  border-color: rgba(0, 191, 166, 0.3);
  background: rgba(255, 255, 255, 0.03);
}

.step__number {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-accent);
  margin-bottom: 20px;
}

.step__title {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--color-surface);
  margin-bottom: 12px;
}

.step__desc {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.55);
  line-height: 1.7;
}

/* ——— Contact ——— */
.contact {
  padding: var(--section-padding) 0;
  background: var(--color-bg-tint);
}

.contact__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}

.contact__text {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

.contact__details {
  margin-top: 20px;
  display: grid;
  gap: 8px;
}

.contact__detail {
  font-size: 0.95rem;
  color: var(--color-text-muted);
}

.contact__detail span {
  color: var(--color-primary);
  font-weight: 600;
}

.contact__detail a {
  color: var(--color-accent);
  font-weight: 500;
}

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

.form__group {
  margin-bottom: 16px;
}

.form__label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-primary);
  margin-bottom: 6px;
}

.form__input {
  width: 100%;
  padding: 12px 16px;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  color: var(--color-primary);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  outline: none;
  transition: var(--transition);
}

.form__input::placeholder {
  color: var(--color-text-light);
}

.form__input:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(0, 191, 166, 0.1);
}

.form__textarea {
  resize: vertical;
  min-height: 100px;
}

/* ——— Footer ——— */
.footer {
  padding: 60px 0 32px;
  background: var(--color-primary);
}

.footer__inner {
  display: flex;
  justify-content: space-between;
  gap: 60px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer .nav__logo {
  color: var(--color-surface);
  margin-bottom: 12px;
}

.footer .nav__logo-symbol {
  --logo-primary: var(--color-surface);
}

.footer .nav__logo-symbol .logo-ring {
  fill: var(--color-primary);
}

.footer__tagline {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.45);
  line-height: 1.6;
}

.footer__links {
  display: flex;
  gap: 60px;
}

.footer__col {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer__heading {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: 4px;
}

.footer__col a {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.4);
  transition: var(--transition);
}

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

.footer__bottom {
  padding-top: 24px;
  text-align: center;
}

.footer__bottom p {
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.3);
}

/* ——— Scroll Animations ——— */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ——— Responsive ——— */
@media (max-width: 968px) {
  :root {
    --section-padding: 80px;
  }

  .hero__container {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero__subtitle { margin: 0 auto 36px; }
  .hero__actions { justify-content: center; }

  .hero__visual {
    order: -1;
    margin-bottom: 20px;
  }

  .hero__graphic { max-width: 280px; }

  .services__grid {
    grid-template-columns: 1fr;
    max-width: 520px;
    margin: 0 auto;
  }

  .about__grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }

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

  .contact__inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}

@media (max-width: 640px) {
  :root {
    --section-padding: 60px;
  }

  .nav__links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: var(--color-surface);
    flex-direction: column;
    align-items: flex-start;
    padding: 80px 32px 32px;
    gap: 24px;
    box-shadow: -4px 0 20px rgba(0, 0, 0, 0.1);
    transition: right 0.3s ease;
  }

  .nav__links.active {
    right: 0;
  }

  .nav__toggle {
    display: flex;
  }

  .nav__toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }

  .nav__toggle.active span:nth-child(2) {
    opacity: 0;
  }

  .nav__toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }

  .hero__title {
    font-size: 2rem;
  }

  .nav__logo-symbol {
    width: 36px;
  }

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

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

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

  .footer__inner {
    flex-direction: column;
    gap: 40px;
  }
}