/* ============================================================
   ARKBERG DIGITAL — STYLESHEET
   Color Palette:
     --bg-0:      #03071E  (deep space)
     --bg-1:      #07112A  (primary bg)
     --bg-2:      #0D1835  (surface)
     --bg-3:      #112247  (card/elevated)
     --accent-1:  #4895EF  (electric blue — brand primary)
     --accent-2:  #4CC9F0  (cyan — secondary highlight)
     --accent-3:  #7B2FBE  (violet — AI/depth accent)
     --text-1:    #E8F4FD  (primary text)
     --text-2:    #8FA8C0  (secondary text)
     --text-3:    #4A6480  (muted text)
   ============================================================ */

:root {
  --bg-0: #03071E;
  --bg-1: #07112A;
  --bg-2: #0D1835;
  --bg-3: #112247;
  --accent-1: #4895EF;
  --accent-2: #4CC9F0;
  --accent-3: #7B2FBE;
  --accent-1-dim: rgba(72, 149, 239, 0.15);
  --accent-2-dim: rgba(76, 201, 240, 0.12);
  --accent-3-dim: rgba(123, 47, 190, 0.15);
  --glow-1: rgba(72, 149, 239, 0.4);
  --glow-2: rgba(76, 201, 240, 0.3);
  --text-1: #E8F4FD;
  --text-2: #8FA8C0;
  --text-3: #4A6480;
  --border: rgba(72, 149, 239, 0.15);
  --border-hover: rgba(76, 201, 240, 0.4);
  --gradient: linear-gradient(135deg, var(--accent-1), var(--accent-2));
  --gradient-rev: linear-gradient(135deg, var(--accent-3), var(--accent-1));
  --radius: 12px;
  --radius-lg: 20px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --nav-height: 72px;
  --font: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
}

/* ---- Reset ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font);
  background: var(--bg-1);
  color: var(--text-1);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img, svg { display: block; }
input, textarea, select, button { font: inherit; }

/* ---- Utility ---- */
.container {
  width: 100%;
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 24px;
}
.gradient-text {
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.accent { color: var(--accent-2); }
.section { padding: 100px 0; }
.section__tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-2);
  background: var(--accent-2-dim);
  border: 1px solid rgba(76, 201, 240, 0.25);
  padding: 4px 14px;
  border-radius: 100px;
  margin-bottom: 20px;
}
.section__header { text-align: center; max-width: 680px; margin: 0 auto 64px; }
.section__title { font-size: clamp(2rem, 4vw, 2.8rem); font-weight: 700; line-height: 1.2; margin-bottom: 16px; }
.section__desc { font-size: 1.05rem; color: var(--text-2); line-height: 1.7; }

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: var(--transition);
  white-space: nowrap;
}
.btn--primary {
  background: var(--gradient);
  color: #fff;
  box-shadow: 0 0 24px rgba(72, 149, 239, 0.35);
}
.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 32px rgba(72, 149, 239, 0.55);
}
.btn--ghost {
  background: transparent;
  color: var(--text-1);
  border: 1.5px solid var(--border);
}
.btn--ghost:hover {
  border-color: var(--accent-2);
  color: var(--accent-2);
  background: var(--accent-2-dim);
}
.btn--full { width: 100%; justify-content: center; }
.btn--outline {
  background: transparent;
  color: var(--accent-1);
  border: 1.5px solid var(--accent-1);
}
.btn--outline:hover {
  background: var(--accent-1-dim);
  transform: translateY(-2px);
}

/* ---- Animation base ---- */
[data-animate] { opacity: 0; transform: translateY(28px); transition: opacity 0.7s ease, transform 0.7s ease; }
[data-animate="fade-right"] { transform: translateX(-32px); }
[data-animate="fade-left"] { transform: translateX(32px); }
[data-animate].is-visible { opacity: 1; transform: none; }

/* ============================================================
   NAVIGATION
   ============================================================ */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--nav-height);
  transition: background var(--transition), box-shadow var(--transition), backdrop-filter var(--transition);
}
.nav.scrolled {
  background: rgba(7, 17, 42, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 1px 0 var(--border);
}
.nav__inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 24px;
}
.nav__logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  transition: opacity var(--transition);
}
.nav__logo:hover { opacity: 0.85; }
.nav__logo-mark { width: 50px; height: 28px; flex-shrink: 0; }
.nav__links {
  display: flex;
  align-items: center;
  gap: 8px;
}
.nav__link {
  padding: 6px 14px;
  font-size: 0.9rem;
  color: var(--text-2);
  border-radius: 6px;
  transition: var(--transition);
}
.nav__link:hover { color: var(--text-1); background: rgba(255,255,255,0.05); }
.nav__cta {
  background: var(--gradient);
  color: #fff !important;
  padding: 8px 20px;
  border-radius: 8px;
  font-weight: 600;
  box-shadow: 0 0 16px rgba(72, 149, 239, 0.3);
}
.nav__cta:hover {
  box-shadow: 0 0 28px rgba(72, 149, 239, 0.5);
  background: none;
  background: var(--gradient);
  transform: translateY(-1px);
}
.nav__link.active { color: var(--accent-2); }
.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 4px;
}
.nav__hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-1);
  border-radius: 2px;
  transition: var(--transition);
}
.nav__hamburger.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.nav__hamburger.open span:nth-child(2) { opacity: 0; }
.nav__hamburger.open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* ============================================================
   HERO
   ============================================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: var(--bg-0);
  overflow: hidden;
}
.hero__canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0.7;
}
.hero__overlay {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 60% at 50% 40%, rgba(7, 17, 42, 0) 0%, var(--bg-0) 75%);
  pointer-events: none;
}
.hero__content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 820px;
  padding: calc(var(--nav-height) + 40px) 24px 40px;
}
.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-2);
  background: rgba(76, 201, 240, 0.08);
  border: 1px solid rgba(76, 201, 240, 0.25);
  padding: 6px 16px;
  border-radius: 100px;
  margin-bottom: 28px;
  animation: fadeSlideUp 0.8s ease both;
}
.hero__badge-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent-2);
  box-shadow: 0 0 8px var(--accent-2);
  animation: pulse 2s infinite;
}
.hero__title {
  font-size: clamp(2.8rem, 7vw, 5.2rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
  animation: fadeSlideUp 0.8s 0.1s ease both;
}
.hero__subtitle {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--text-2);
  max-width: 580px;
  margin: 0 auto 40px;
  line-height: 1.7;
  animation: fadeSlideUp 0.8s 0.2s ease both;
}
.hero__actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 64px;
  animation: fadeSlideUp 0.8s 0.3s ease both;
}
.hero__stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  animation: fadeSlideUp 0.8s 0.4s ease both;
}
.hero__stat {
  text-align: center;
  padding: 0 32px;
}
.hero__stat-number {
  display: block;
  font-size: 2.2rem;
  font-weight: 800;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
}
.hero__stat > span:not(.hero__stat-number):not(.hero__stat-label) {
  font-size: 1.4rem;
  font-weight: 700;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero__stat-label {
  display: block;
  font-size: 0.78rem;
  color: var(--text-3);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-top: 4px;
}
.hero__stat-divider {
  width: 1px;
  height: 40px;
  background: var(--border);
  flex-shrink: 0;
}
.hero__scroll {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  animation: fadeSlideUp 1s 0.8s ease both;
}
.hero__scroll-mouse {
  width: 26px;
  height: 40px;
  border: 2px solid rgba(255,255,255,0.2);
  border-radius: 13px;
  display: flex;
  justify-content: center;
  padding-top: 6px;
  transition: border-color var(--transition);
}
.hero__scroll:hover .hero__scroll-mouse { border-color: var(--accent-2); }
.hero__scroll-wheel {
  width: 4px;
  height: 8px;
  background: var(--accent-2);
  border-radius: 2px;
  animation: scrollWheel 1.8s ease infinite;
}

/* ============================================================
   SERVICES
   ============================================================ */
.services { background: var(--bg-1); }
.services__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}
.service-card {
  position: relative;
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
  overflow: hidden;
  cursor: default;
}
.service-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--gradient);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}
.service-card:hover { transform: translateY(-6px); border-color: var(--border-hover); box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4), 0 0 40px rgba(72, 149, 239, 0.1); }
.service-card:hover::before { transform: scaleX(1); }
.service-card__glow {
  position: absolute;
  width: 160px;
  height: 160px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(72, 149, 239, 0.12) 0%, transparent 70%);
  top: -40px;
  right: -40px;
  pointer-events: none;
  transition: opacity var(--transition);
  opacity: 0;
}
.service-card:hover .service-card__glow { opacity: 1; }
.service-card__icon {
  width: 52px;
  height: 52px;
  background: var(--accent-1-dim);
  border: 1px solid rgba(72, 149, 239, 0.2);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  transition: background var(--transition), box-shadow var(--transition);
}
.service-card:hover .service-card__icon {
  background: rgba(72, 149, 239, 0.25);
  box-shadow: 0 0 20px rgba(72, 149, 239, 0.25);
}
.service-card__icon svg { width: 28px; height: 28px; color: var(--accent-1); }
.service-card h3 { font-size: 1.2rem; font-weight: 700; margin-bottom: 12px; }
.service-card p { font-size: 0.92rem; color: var(--text-2); line-height: 1.7; margin-bottom: 24px; }
.service-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.service-card__tags li {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--accent-2);
  background: var(--accent-2-dim);
  border: 1px solid rgba(76, 201, 240, 0.2);
  padding: 3px 10px;
  border-radius: 100px;
}

/* ============================================================
   ABOUT (PARALLAX BAND)
   ============================================================ */
.about {
  position: relative;
  padding: 120px 0;
  overflow: hidden;
}
.about__parallax {
  position: absolute;
  inset: -30%;
  background:
    radial-gradient(ellipse 60% 50% at 20% 50%, rgba(123, 47, 190, 0.18) 0%, transparent 60%),
    radial-gradient(ellipse 40% 60% at 80% 50%, rgba(72, 149, 239, 0.12) 0%, transparent 60%),
    var(--bg-0);
  will-change: transform;
}
.about__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, var(--bg-1) 0%, transparent 15%, transparent 85%, var(--bg-1) 100%);
  pointer-events: none;
}
.about__inner {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}
.about__text p {
  color: var(--text-2);
  font-size: 1rem;
  line-height: 1.8;
  margin-bottom: 20px;
}
.about__text .section__title { text-align: left; margin-bottom: 24px; }
.about__text .section__tag { margin-bottom: 16px; }
.about__text .btn { margin-top: 8px; }
.about__visual { position: relative; display: flex; align-items: center; justify-content: center; min-height: 380px; }
.about__orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  animation: float 8s ease-in-out infinite;
}
.about__orb--1 {
  width: 240px; height: 240px;
  background: radial-gradient(circle, rgba(72, 149, 239, 0.25), transparent 70%);
  top: 10%; left: 5%;
  animation-delay: 0s;
}
.about__orb--2 {
  width: 180px; height: 180px;
  background: radial-gradient(circle, rgba(123, 47, 190, 0.3), transparent 70%);
  bottom: 15%; right: 10%;
  animation-delay: -3s;
}
.about__orb--3 {
  width: 120px; height: 120px;
  background: radial-gradient(circle, rgba(76, 201, 240, 0.2), transparent 70%);
  top: 45%; right: 25%;
  animation-delay: -6s;
}
.about__card {
  position: relative;
  z-index: 2;
  background: rgba(17, 34, 71, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  width: 100%;
  max-width: 380px;
  box-shadow: 0 32px 80px rgba(0,0,0,0.4);
}
.about__card-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 0;
  border-bottom: 1px solid rgba(255,255,255,0.05);
  font-size: 0.92rem;
  color: var(--text-1);
  transition: color var(--transition);
}
.about__card-item:last-child { border-bottom: none; padding-bottom: 0; }
.about__card-item:first-child { padding-top: 0; }
.about__card-item svg { width: 20px; height: 20px; flex-shrink: 0; color: var(--accent-2); }

/* ============================================================
   TECH STACK
   ============================================================ */
.stack { background: var(--bg-2); }
.stack__categories {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 32px;
}
.stack__category-title {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent-1);
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}
.stack__pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.pill {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-2);
  background: var(--bg-3);
  border: 1px solid var(--border);
  padding: 6px 14px;
  border-radius: 8px;
  transition: var(--transition);
  cursor: default;
}
.pill:hover {
  color: var(--accent-2);
  border-color: rgba(76, 201, 240, 0.35);
  background: var(--accent-2-dim);
  transform: translateY(-2px);
}

/* ============================================================
   PROCESS
   ============================================================ */
.process { background: var(--bg-1); }
.process__steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0;
  position: relative;
}
.process__steps::before {
  content: '';
  position: absolute;
  top: 52px;
  left: 10%;
  right: 10%;
  height: 1px;
  background: linear-gradient(to right, transparent, var(--border), var(--accent-1), var(--border), transparent);
}
.process__step {
  position: relative;
  padding: 0 24px;
  text-align: center;
}
.process__step-number {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--bg-3);
  border: 2px solid var(--accent-1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.82rem;
  font-weight: 800;
  font-family: var(--font-mono);
  color: var(--accent-1);
  margin: 0 auto 28px;
  position: relative;
  z-index: 1;
  box-shadow: 0 0 20px rgba(72, 149, 239, 0.25);
  transition: box-shadow var(--transition);
}
.process__step:hover .process__step-number {
  box-shadow: 0 0 32px rgba(72, 149, 239, 0.5);
}
.process__step-content h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text-1);
}
.process__step-content p { font-size: 0.88rem; color: var(--text-2); line-height: 1.7; }

/* ============================================================
   CONTACT
   ============================================================ */
.contact {
  position: relative;
  padding: 120px 0;
  background: var(--bg-0);
  overflow: hidden;
}
.contact__bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 50% 60% at 0% 100%, rgba(123, 47, 190, 0.15) 0%, transparent 60%),
    radial-gradient(ellipse 40% 50% at 100% 0%, rgba(72, 149, 239, 0.1) 0%, transparent 60%);
  pointer-events: none;
}
.contact__inner {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 80px;
  align-items: start;
}
.contact__content .section__tag { margin-bottom: 16px; }
.contact__content .section__title { text-align: left; margin-bottom: 16px; }
.contact__content > p { color: var(--text-2); margin-bottom: 40px; line-height: 1.7; }
.contact__form { display: flex; flex-direction: column; gap: 20px; }
.form__row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.form__group { display: flex; flex-direction: column; gap: 8px; }
.form__group label { font-size: 0.82rem; font-weight: 600; color: var(--text-2); letter-spacing: 0.04em; }
.form__group input,
.form__group select,
.form__group textarea {
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-1);
  padding: 12px 16px;
  font-size: 0.92rem;
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
  resize: vertical;
}
.form__group input::placeholder,
.form__group textarea::placeholder { color: var(--text-3); }
.form__group select { cursor: pointer; appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' fill='none'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%234A6480' stroke-width='1.5' stroke-linecap='round'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 16px center; }
.form__group select option { background: var(--bg-3); }
.form__group input:focus,
.form__group select:focus,
.form__group textarea:focus {
  border-color: var(--accent-1);
  box-shadow: 0 0 0 3px rgba(72, 149, 239, 0.15);
}
.contact__email-cta { display: flex; flex-direction: column; gap: 24px; }
.contact__email-cta > p { color: var(--text-2); line-height: 1.7; }
.contact__email-hint { font-size: 0.88rem; color: var(--text-3); letter-spacing: 0.02em; }
.contact__info { display: flex; flex-direction: column; gap: 20px; padding-top: 80px; }
.contact__info-card {
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: border-color var(--transition);
}
.contact__info-card:hover { border-color: var(--border-hover); }
.contact__info-card h4 { font-size: 0.95rem; font-weight: 700; margin-bottom: 6px; color: var(--accent-2); }
.contact__info-card p { font-size: 0.88rem; color: var(--text-2); line-height: 1.6; }
.contact__links { margin-top: 8px; }
.contact__link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--text-2);
  transition: color var(--transition);
}
.contact__link:hover { color: var(--accent-2); }
.contact__link svg { width: 18px; height: 18px; }

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  background: var(--bg-0);
  border-top: 1px solid var(--border);
  padding: 60px 0 0;
}
.footer__inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 48px;
  flex-wrap: wrap;
  padding-bottom: 48px;
}
.footer__brand .nav__logo { margin-bottom: 12px; }
.footer__tagline { font-size: 0.88rem; color: var(--text-3); }
.footer__nav { display: flex; gap: 64px; }
.footer__nav-col h5 {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: 16px;
}
.footer__nav-col ul { display: flex; flex-direction: column; gap: 10px; }
.footer__nav-col a { font-size: 0.88rem; color: var(--text-2); transition: color var(--transition); }
.footer__nav-col a:hover { color: var(--accent-2); }
.footer__bottom {
  border-top: 1px solid var(--border);
  padding: 20px 24px;
  text-align: center;
}
.footer__bottom p { font-size: 0.82rem; color: var(--text-3); }

/* ============================================================
   KEYFRAMES
   ============================================================ */
@keyframes fadeSlideUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(76, 201, 240, 0.5); }
  50%       { box-shadow: 0 0 0 6px rgba(76, 201, 240, 0); }
}
@keyframes scrollWheel {
  0%   { opacity: 1; transform: translateY(0); }
  100% { opacity: 0; transform: translateY(12px); }
}
@keyframes float {
  0%, 100% { transform: translateY(0px) scale(1); }
  50%       { transform: translateY(-20px) scale(1.05); }
}
@keyframes shimmer {
  0%   { background-position: -200% center; }
  100% { background-position: 200% center; }
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 900px) {
  .about__inner { grid-template-columns: 1fr; gap: 48px; }
  .about__visual { min-height: 280px; }
  .contact__inner { grid-template-columns: 1fr; gap: 48px; }
  .contact__info { padding-top: 0; }
  .process__steps::before { display: none; }
  .process__steps { gap: 32px; }
  .process__step { text-align: left; display: flex; align-items: flex-start; gap: 20px; padding: 0; }
  .process__step-number { flex-shrink: 0; margin: 0; }
  .nav__links { display: none; position: absolute; top: var(--nav-height); left: 0; right: 0; flex-direction: column; align-items: stretch; gap: 4px; background: rgba(7, 17, 42, 0.97); backdrop-filter: blur(16px); padding: 16px; border-bottom: 1px solid var(--border); }
  .nav__links.open { display: flex; }
  .nav__hamburger { display: flex; }
  .hero__stats { flex-direction: column; gap: 20px; }
  .hero__stat-divider { width: 40px; height: 1px; }
  .form__row { grid-template-columns: 1fr; }
  .footer__inner { flex-direction: column; gap: 32px; }
  .footer__nav { gap: 32px; }
}

@media (max-width: 600px) {
  .section { padding: 72px 0; }
  .services__grid { grid-template-columns: 1fr; }
  .stack__categories { grid-template-columns: 1fr; }
  .hero__actions { flex-direction: column; align-items: stretch; }
  .hero__actions .btn { text-align: center; justify-content: center; }
}