/* ═══════════════════════════════════════════════
   NEXUS STUDIO — styles.css
   Dark · Premium · Modern
═══════════════════════════════════════════════ */

/* ── Variables ── */
:root {
  --black:   #080a0f;
  --black-2: #0d1017;
  --black-3: #131720;
  --white:   #f5f6fa;
  --white-dim: rgba(245,246,250,.65);
  --blue:    #2563eb;
  --blue-lt: #3b82f6;
  --blue-glow: rgba(37,99,235,.25);
  --border:  rgba(255,255,255,.07);
  --border-hover: rgba(37,99,235,.5);

  --font-display: 'Syne', sans-serif;
  --font-body:    'DM Sans', sans-serif;

  --radius: 12px;
  --radius-lg: 20px;
  --transition: .3s cubic-bezier(.4,0,.2,1);
  --section-pad: 120px;
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--black);
  color: var(--white);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { display: block; max-width: 100%; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font: inherit; }

/* ── Typography ── */
h1,h2,h3,h4 { font-family: var(--font-display); line-height: 1.1; }

/* ── Container ── */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ── Section Helpers ── */
.section { padding: var(--section-pad) 0; }
.section__label {
  font-family: var(--font-display);
  font-size: .75rem;
  font-weight: 600;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--blue-lt);
  margin-bottom: 16px;
  display: block;
}
.section__title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  color: var(--white);
  margin-bottom: 24px;
}
.section__header { text-align: center; margin-bottom: 64px; }

/* ── Reveal Animations ── */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity .7s ease, transform .7s ease;
}
.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}
.reveal--delay-1 { transition-delay: .12s; }
.reveal--delay-2 { transition-delay: .24s; }
.reveal--delay-3 { transition-delay: .36s; }
.reveal--delay-4 { transition-delay: .48s; }

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--radius);
  font-family: var(--font-display);
  font-size: .9rem;
  font-weight: 600;
  letter-spacing: .03em;
  transition: var(--transition);
  white-space: nowrap;
}
.btn--primary {
  background: var(--blue);
  color: #fff;
  box-shadow: 0 0 0 0 var(--blue-glow);
}
.btn--primary:hover {
  background: var(--blue-lt);
  box-shadow: 0 8px 32px var(--blue-glow);
  transform: translateY(-2px);
}
.btn--ghost {
  background: transparent;
  color: var(--white-dim);
  border: 1px solid var(--border);
}
.btn--ghost:hover {
  border-color: var(--border-hover);
  color: var(--white);
  background: rgba(37,99,235,.08);
}
.btn--nav {
  background: rgba(37,99,235,.15);
  color: var(--blue-lt);
  border: 1px solid var(--border-hover);
  padding: 10px 20px;
  font-size: .85rem;
}
.btn--nav:hover { background: var(--blue); color: #fff; }
.btn--white {
  background: var(--white);
  color: var(--black);
  font-weight: 700;
}
.btn--white:hover { background: #dbeafe; transform: translateY(-2px); }
.btn--full { width: 100%; justify-content: center; }

/* ─────────────────────────────────────
   NAV
───────────────────────────────────── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 20px 0;
  transition: background var(--transition), padding var(--transition), box-shadow var(--transition);
}
.nav.scrolled {
  background: rgba(8,10,15,.92);
  backdrop-filter: blur(16px);
  padding: 14px 0;
  box-shadow: 0 1px 0 var(--border);
}
.nav__inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 40px;
}
.nav__logo {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -.02em;
  margin-right: auto;
}
.nav__logo span { color: var(--blue); }
.nav__links {
  display: flex;
  gap: 32px;
}
.nav__link {
  font-size: .88rem;
  font-weight: 500;
  color: var(--white-dim);
  position: relative;
  transition: color var(--transition);
}
.nav__link::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0;
  width: 0; height: 2px;
  background: var(--blue-lt);
  transition: width var(--transition);
}
.nav__link:hover { color: var(--white); }
.nav__link:hover::after { width: 100%; }
.nav__burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
}
.nav__burger span {
  width: 22px; height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: var(--transition);
  display: block;
}
.nav__burger.active span:nth-child(1) { transform: rotate(45deg) translate(5px,5px); }
.nav__burger.active span:nth-child(2) { opacity: 0; }
.nav__burger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px,-5px); }

/* ─────────────────────────────────────
   HERO
───────────────────────────────────── */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding: 120px 24px 80px;
}
.hero__bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}
.hero__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 40%, black 30%, transparent 100%);
}
.hero__orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  pointer-events: none;
}
.hero__orb--1 {
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(37,99,235,.22) 0%, transparent 70%);
  top: -100px; right: -100px;
  animation: orbFloat 8s ease-in-out infinite;
}
.hero__orb--2 {
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(59,130,246,.15) 0%, transparent 70%);
  bottom: 0; left: 10%;
  animation: orbFloat 10s ease-in-out infinite reverse;
}
@keyframes orbFloat {
  0%,100% { transform: translate(0,0); }
  50% { transform: translate(20px,-30px); }
}

.hero__content {
  position: relative;
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
}
.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(37,99,235,.12);
  border: 1px solid rgba(37,99,235,.3);
  color: var(--blue-lt);
  font-family: var(--font-display);
  font-size: .78rem;
  font-weight: 600;
  letter-spacing: .15em;
  text-transform: uppercase;
  padding: 7px 16px;
  border-radius: 999px;
  margin-bottom: 28px;
}
.hero__badge::before {
  content: '';
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--blue-lt);
  animation: pulse 2s ease infinite;
}
@keyframes pulse {
  0%,100% { opacity: 1; transform: scale(1); }
  50% { opacity: .5; transform: scale(.8); }
}

.hero__headline {
  font-size: clamp(3rem, 8vw, 6.5rem);
  font-weight: 800;
  line-height: 1.0;
  letter-spacing: -.03em;
  margin-bottom: 28px;
}
.hero__gradient-text {
  background: linear-gradient(135deg, var(--blue-lt) 0%, #60a5fa 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero__sub {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--white-dim);
  max-width: 520px;
  margin-bottom: 40px;
  font-weight: 300;
}
.hero__actions { display: flex; gap: 16px; flex-wrap: wrap; }

.hero__scroll-indicator {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}
.hero__scroll-indicator span {
  font-size: .7rem;
  letter-spacing: .15em;
  text-transform: uppercase;
  color: rgba(255,255,255,.3);
}
.hero__scroll-line {
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, rgba(255,255,255,.3), transparent);
  animation: scrollLine 2s ease-in-out infinite;
}
@keyframes scrollLine {
  0%,100% { transform: scaleY(1); opacity: .6; }
  50% { transform: scaleY(.5); opacity: 1; }
}

/* ─────────────────────────────────────
   STATS
───────────────────────────────────── */
.stats {
  background: var(--black-2);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 56px 0;
}
.stats__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
}
.stat {
  text-align: center;
  padding: 24px 16px;
  border-right: 1px solid var(--border);
}
.stat:last-child { border-right: none; }
.stat__number {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 800;
  color: var(--white);
  line-height: 1;
}
.stat__suffix {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--blue-lt);
}
.stat__label {
  font-size: .82rem;
  color: var(--white-dim);
  margin-top: 8px;
  letter-spacing: .05em;
  text-transform: uppercase;
}

/* ─────────────────────────────────────
   ABOUT
───────────────────────────────────── */
.about { background: var(--black); }
.about__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}
.about__img-block {
  position: relative;
  aspect-ratio: 1;
  max-width: 440px;
}
.about__img-accent {
  position: absolute;
  inset: -20px;
  border: 1px solid var(--border-hover);
  border-radius: var(--radius-lg);
  opacity: .4;
}
.about__img-main {
  position: relative;
  width: 100%;
  height: 100%;
  background: var(--black-3);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.about__img-main::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 50%, var(--blue-glow) 0%, transparent 70%);
}
.about__icon-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  position: relative;
}
.about__icon {
  width: 80px; height: 80px;
  background: var(--black-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  transition: var(--transition);
}
.about__icon:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: 0 12px 32px var(--blue-glow);
}
.about__body {
  color: var(--white-dim);
  margin-bottom: 16px;
  font-size: .95rem;
}

/* ─────────────────────────────────────
   SERVICES
───────────────────────────────────── */
.services { background: var(--black-2); }
.services__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.service-card {
  background: var(--black-2);
  padding: 48px;
  border-right: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition);
  position: relative;
  overflow: hidden;
}
.service-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 3px;
  background: linear-gradient(90deg, var(--blue), transparent);
  opacity: 0;
  transition: opacity var(--transition);
}
.service-card:hover { background: var(--black-3); }
.service-card:hover::before { opacity: 1; }
.service-card__icon {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 800;
  color: rgba(37,99,235,.2);
  line-height: 1;
  margin-bottom: 24px;
  transition: color var(--transition);
}
.service-card:hover .service-card__icon { color: rgba(37,99,235,.5); }
.service-card__title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 12px;
}
.service-card__desc {
  color: var(--white-dim);
  font-size: .9rem;
  margin-bottom: 28px;
}
.service-card__link {
  font-family: var(--font-display);
  font-size: .85rem;
  font-weight: 600;
  color: var(--blue-lt);
  transition: gap var(--transition);
  display: inline-flex;
  gap: 4px;
}
.service-card__link:hover { gap: 8px; }

/* ─────────────────────────────────────
   TESTIMONIALS
───────────────────────────────────── */
.testimonials { background: var(--black); }
.testimonials__track {
  display: flex;
  overflow: hidden;
}
.testimonial-card {
  min-width: 100%;
  background: var(--black-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 56px;
  transition: transform .5s cubic-bezier(.4,0,.2,1);
}
.testimonial-card__stars {
  color: #f59e0b;
  font-size: 1.1rem;
  letter-spacing: .1em;
  margin-bottom: 24px;
}
.testimonial-card__quote {
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  font-weight: 300;
  color: var(--white);
  line-height: 1.6;
  margin-bottom: 40px;
  font-style: italic;
  max-width: 720px;
}
.testimonial-card__author {
  display: flex;
  align-items: center;
  gap: 16px;
}
.testimonial-card__avatar {
  width: 48px; height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--blue), var(--blue-lt));
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: .8rem;
  font-weight: 700;
  flex-shrink: 0;
}
.testimonial-card__author strong {
  display: block;
  font-family: var(--font-display);
  font-weight: 700;
}
.testimonial-card__author span {
  font-size: .85rem;
  color: var(--white-dim);
}
.testimonials__dots {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-top: 32px;
}
.dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--border);
  border: 1px solid var(--border);
  transition: var(--transition);
}
.dot--active, .dot:hover {
  background: var(--blue-lt);
  border-color: var(--blue-lt);
  transform: scale(1.3);
}

/* ─────────────────────────────────────
   CTA BANNER
───────────────────────────────────── */
.cta-banner {
  position: relative;
  padding: 100px 24px;
  text-align: center;
  overflow: hidden;
}
.cta-banner__bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, #0d1a3a 0%, #0a0f1e 50%, #0d1a3a 100%);
}
.cta-banner__bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 60% 80% at 50% 50%, rgba(37,99,235,.25) 0%, transparent 70%);
}
.cta-banner__inner { position: relative; }
.cta-banner__title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 800;
  margin-bottom: 20px;
}
.cta-banner__sub {
  color: var(--white-dim);
  font-size: 1.1rem;
  margin-bottom: 40px;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}

/* ─────────────────────────────────────
   CONTACT
───────────────────────────────────── */
.contact { background: var(--black-2); }
.contact__inner {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 80px;
  align-items: start;
}
.contact__body {
  color: var(--white-dim);
  font-size: .95rem;
  margin-bottom: 40px;
}
.contact__details { display: flex; flex-direction: column; gap: 16px; }
.contact__detail {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: .9rem;
  color: var(--white-dim);
}
.contact__detail-icon {
  width: 36px; height: 36px;
  background: rgba(37,99,235,.12);
  border: 1px solid var(--border-hover);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: .9rem;
}

/* ─ Form ─ */
.contact-form { display: flex; flex-direction: column; gap: 20px; }
.form-group { display: flex; flex-direction: column; gap: 8px; }
.form-group label {
  font-size: .82rem;
  font-weight: 600;
  letter-spacing: .05em;
  text-transform: uppercase;
  color: var(--white-dim);
  font-family: var(--font-display);
}
.form-group input,
.form-group textarea,
.form-group select {
  background: var(--black-3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--white);
  font-family: var(--font-body);
  font-size: .95rem;
  padding: 14px 18px;
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
  appearance: none;
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: rgba(255,255,255,.25); }
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 3px var(--blue-glow);
}
.form-group input.error,
.form-group textarea.error { border-color: #ef4444; }
.form-error {
  font-size: .8rem;
  color: #f87171;
  display: none;
}
.form-error.show { display: block; }
.form-success {
  display: none;
  background: rgba(22,163,74,.12);
  border: 1px solid rgba(22,163,74,.3);
  color: #4ade80;
  padding: 14px 18px;
  border-radius: var(--radius);
  font-size: .9rem;
  text-align: center;
}
.form-success.show { display: block; }

.btn__loader {
  width: 16px; height: 16px;
  border: 2px solid rgba(255,255,255,.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin .6s linear infinite;
  display: none;
}
.btn--loading .btn__loader { display: block; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ─────────────────────────────────────
   FOOTER
───────────────────────────────────── */
.footer {
  background: var(--black);
  border-top: 1px solid var(--border);
  padding: 40px 0;
}
.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 24px;
}
.footer__logo {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 800;
}
.footer__logo span { color: var(--blue); }
.footer__links {
  display: flex;
  gap: 32px;
}
.footer__links a {
  font-size: .85rem;
  color: var(--white-dim);
  transition: color var(--transition);
}
.footer__links a:hover { color: var(--white); }
.footer__copy {
  font-size: .8rem;
  color: rgba(255,255,255,.25);
}

/* ─────────────────────────────────────
   RESPONSIVE
───────────────────────────────────── */
@media (max-width: 1024px) {
  :root { --section-pad: 80px; }
  .about__inner { grid-template-columns: 1fr; gap: 48px; }
  .about__img-block { max-width: 360px; aspect-ratio: 1; }
  .contact__inner { grid-template-columns: 1fr; gap: 48px; }
}

@media (max-width: 768px) {
  :root { --section-pad: 64px; }

  /* Nav */
  .nav__links {
    position: fixed;
    top: 0; right: -100%;
    width: 75%;
    height: 100vh;
    background: rgba(8,10,15,.97);
    backdrop-filter: blur(24px);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 40px;
    transition: right var(--transition);
    border-left: 1px solid var(--border);
  }
  .nav__links.open { right: 0; }
  .nav__link { font-size: 1.2rem; }
  .btn--nav { display: none; }
  .nav__burger { display: flex; }

  /* Stats */
  .stats__grid { grid-template-columns: repeat(2, 1fr); }
  .stat { border-right: none; border-bottom: 1px solid var(--border); }
  .stat:nth-child(odd) { border-right: 1px solid var(--border); }
  .stat:nth-child(3), .stat:nth-child(4) { border-bottom: none; }

  /* Services */
  .services__grid { grid-template-columns: 1fr; }
  .service-card { padding: 32px; }

  /* Testimonial */
  .testimonial-card { padding: 32px; }

  /* Footer */
  .footer__inner { flex-direction: column; text-align: center; }
  .footer__links { justify-content: center; }
}

@media (max-width: 480px) {
  .hero { padding: 100px 24px 60px; }
  .hero__headline { font-size: 2.8rem; }
  .hero__actions { flex-direction: column; }
  .hero__actions .btn { width: 100%; justify-content: center; }
  .stats__grid { grid-template-columns: 1fr 1fr; }
}