/* ===========================
   STACK — Stylesheet
   =========================== */

:root {
  --bg: #080c14;
  --bg-2: #0d1420;
  --bg-3: #111827;
  --border: rgba(255, 255, 255, 0.07);
  --text: #e8edf5;
  --text-muted: #7a8799;
  --accent: #4f8ef7;
  --accent-glow: rgba(79, 142, 247, 0.15);
  --accent-2: #7c5cfc;
  --green: #22d3a0;
  --font: 'Inter', sans-serif;
  --mono: 'JetBrains Mono', monospace;
  --radius: 12px;
  --radius-lg: 20px;
  --transition: 0.3s ease;
  --shadow: 0 4px 32px rgba(0, 0, 0, 0.4);
  --shadow-accent: 0 0 40px rgba(79, 142, 247, 0.12);
}

/* ===== RESET & BASE ===== */
*, *::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);
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

.container {
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px;
}

.section { padding: 100px 0; }

/* ===== TYPOGRAPHY ===== */
h1, h2, h3 { font-weight: 700; line-height: 1.15; letter-spacing: -0.02em; }
h1 { font-size: clamp(2.4rem, 6vw, 4.5rem); }
h2 { font-size: clamp(1.8rem, 4vw, 2.8rem); }
h3 { font-size: 1.25rem; }

.section__tag {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--accent);
  letter-spacing: 0.08em;
  display: block;
  margin-bottom: 12px;
}

.section__title { margin-bottom: 20px; }

.section__desc {
  color: var(--text-muted);
  font-size: 1.1rem;
  max-width: 520px;
}

.section__header {
  text-align: center;
  margin-bottom: 64px;
}
.section__header .section__desc { margin: 0 auto; }

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: var(--transition);
  text-decoration: none;
}

.btn--primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 0 24px rgba(79, 142, 247, 0.25);
}
.btn--primary:hover {
  background: #6ba0ff;
  box-shadow: 0 0 32px rgba(79, 142, 247, 0.4);
  transform: translateY(-2px);
}

.btn--ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}
.btn--ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}

.btn--full { width: 100%; justify-content: center; }

/* ===== NAVBAR ===== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 20px 0;
  transition: var(--transition);
}

.nav.scrolled {
  background: rgba(8, 12, 20, 0.9);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  padding: 14px 0;
}

.nav__inner {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav__logo {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.03em;
}

.logo-bracket {
  color: var(--accent);
  font-weight: 300;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 36px;
}

.nav__links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: var(--transition);
}
.nav__links a:hover { color: var(--text); }

.nav__cta {
  padding: 10px 22px !important;
  border-radius: 8px;
  background: var(--accent) !important;
  color: #fff !important;
  font-size: 0.9rem !important;
}
.nav__cta:hover {
  background: #6ba0ff !important;
  transform: translateY(-1px);
}

.nav__burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav__burger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: var(--transition);
}

/* ===== HERO ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding-top: 80px;
}

.hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.grid-overlay {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(79, 142, 247, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(79, 142, 247, 0.04) 1px, transparent 1px);
  background-size: 64px 64px;
}

.grid-overlay::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 60% 60% at 50% 50%, transparent 40%, var(--bg) 100%);
}

.hero::before {
  content: '';
  position: absolute;
  top: -200px;
  left: -200px;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(79, 142, 247, 0.08) 0%, transparent 70%);
  z-index: 0;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -100px;
  right: -100px;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(124, 92, 252, 0.07) 0%, transparent 70%);
  z-index: 0;
}

.hero__content {
  position: relative;
  z-index: 1;
  max-width: 760px;
}

.hero__tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 32px;
  background: rgba(255,255,255,0.02);
}

.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 8px var(--green);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.hero__title {
  margin-bottom: 28px;
  font-weight: 900;
}

.highlight {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__subtitle {
  font-size: 1.2rem;
  color: var(--text-muted);
  max-width: 540px;
  margin-bottom: 44px;
  line-height: 1.75;
}

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

.hero__scroll {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  z-index: 1;
}

.hero__scroll span {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  letter-spacing: 0.15em;
}

.scroll-line {
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, var(--text-muted), transparent);
  animation: scrollDown 1.5s ease-in-out infinite;
}

@keyframes scrollDown {
  0% { transform: scaleY(0); transform-origin: top; }
  50% { transform: scaleY(1); transform-origin: top; }
  51% { transform: scaleY(1); transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* ===== STATS ===== */
.stats {
  background: var(--bg-2);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 64px 0;
}

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

.stat__number {
  display: block;
  font-size: 2.8rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.03em;
}

.stat__label {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ===== SERVICES ===== */
.services { background: var(--bg); }

.services__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.service-card {
  position: relative;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px 36px;
  transition: var(--transition);
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  opacity: 0;
  transition: var(--transition);
}

.service-card:hover {
  border-color: rgba(79, 142, 247, 0.25);
  transform: translateY(-6px);
  box-shadow: var(--shadow-accent);
}
.service-card:hover::before { opacity: 1; }

.service-card--featured {
  background: linear-gradient(160deg, rgba(79, 142, 247, 0.08) 0%, var(--bg-2) 60%);
  border-color: rgba(79, 142, 247, 0.2);
}
.service-card--featured::before { opacity: 1; }

.service-card__badge {
  display: inline-block;
  padding: 4px 12px;
  background: rgba(79, 142, 247, 0.12);
  border: 1px solid rgba(79, 142, 247, 0.25);
  border-radius: 100px;
  font-size: 0.75rem;
  color: var(--accent);
  font-weight: 500;
  margin-bottom: 20px;
}

.service-card__icon {
  width: 52px;
  height: 52px;
  color: var(--accent);
  margin-bottom: 24px;
}

.service-card__title {
  font-size: 1.3rem;
  margin-bottom: 16px;
}

.service-card__text {
  color: var(--text-muted);
  font-size: 0.93rem;
  line-height: 1.75;
  margin-bottom: 24px;
}

.service-card__list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.service-card__list li {
  font-size: 0.87rem;
  color: var(--text-muted);
  padding-left: 16px;
  position: relative;
}

.service-card__list li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-size: 0.75rem;
}

.service-card__num {
  position: absolute;
  bottom: 24px;
  right: 30px;
  font-size: 4rem;
  font-weight: 900;
  color: rgba(255,255,255,0.03);
  font-family: var(--mono);
  line-height: 1;
}

/* ===== ABOUT ===== */
.about { background: var(--bg-3); }

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

.about__visual {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.about__card {
  display: flex;
  align-items: center;
  gap: 20px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 28px;
}

.about__avatar {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.1rem;
  flex-shrink: 0;
  color: #fff;
  overflow: hidden;
}

.about__avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
}

.about__info {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.about__info strong { font-size: 1.05rem; }
.about__info span { font-size: 0.85rem; color: var(--text-muted); }

.about__tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tech-tag {
  padding: 6px 14px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 0.82rem;
  font-family: var(--mono);
  color: var(--text-muted);
  transition: var(--transition);
}

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

.about__text { display: flex; flex-direction: column; gap: 20px; }
.about__text p { color: var(--text-muted); font-size: 0.97rem; }
.about__text strong { color: var(--text); }

/* ===== EXPERTISE ===== */
.expertise { background: var(--bg); }

.expertise__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.expertise__item {
  padding: 36px 30px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: var(--transition);
}

.expertise__item:hover {
  border-color: rgba(79, 142, 247, 0.2);
  transform: translateY(-4px);
}

.expertise__icon {
  font-size: 2rem;
  margin-bottom: 20px;
  display: block;
}

.expertise__item h3 {
  font-size: 1.05rem;
  margin-bottom: 12px;
}

.expertise__item p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ===== CONTACT ===== */
.contact { background: var(--bg-2); }

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

.contact__text { display: flex; flex-direction: column; gap: 20px; }
.contact__text p { color: var(--text-muted); }

.contact__details {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-top: 8px;
}

.contact__detail {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.93rem;
}

.contact__detail-icon {
  width: 36px;
  height: 36px;
  background: var(--accent-glow);
  border: 1px solid rgba(79, 142, 247, 0.2);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  flex-shrink: 0;
}

.contact__detail a { color: var(--accent); }
.contact__detail a:hover { text-decoration: underline; }

/* Form */
.contact__form { display: flex; flex-direction: column; gap: 20px; }

.form-group { display: flex; flex-direction: column; gap: 8px; }

.form-group label {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-muted);
}

.form-group input,
.form-group select,
.form-group textarea {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 13px 16px;
  color: var(--text);
  font-family: var(--font);
  font-size: 0.93rem;
  outline: none;
  transition: var(--transition);
  width: 100%;
  appearance: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(79, 142, 247, 0.1);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: rgba(122, 135, 153, 0.5);
}

.form-group select option { background: var(--bg-3); }

.form-group textarea { resize: vertical; min-height: 120px; }

/* ===== FOOTER ===== */
.footer {
  background: var(--bg);
  border-top: 1px solid var(--border);
  padding-top: 64px;
}

.footer__inner {
  display: flex;
  justify-content: space-between;
  align-items: start;
  padding-bottom: 48px;
}

.footer__brand { display: flex; flex-direction: column; gap: 10px; }
.footer__brand p { font-size: 0.9rem; color: var(--text-muted); }
.footer__credit { font-size: 0.85rem !important; color: var(--text-muted) !important; }
.footer__credit strong { color: var(--text); }

.footer__nav ul {
  display: flex;
  gap: 28px;
}
.footer__nav a {
  font-size: 0.9rem;
  color: var(--text-muted);
  transition: var(--transition);
}
.footer__nav a:hover { color: var(--accent); }

.footer__bottom {
  border-top: 1px solid var(--border);
  padding: 20px 0;
}
.footer__bottom .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.footer__mono {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: rgba(122, 135, 153, 0.5);
}

/* ===== ANIMATIONS ===== */
[data-animate] {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-animate].visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .services__grid { grid-template-columns: 1fr 1fr; }
  .expertise__grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .section { padding: 72px 0; }

  .nav__links { display: none; }
  .nav__burger { display: flex; }

  .nav__links.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    inset: 0;
    background: var(--bg);
    align-items: center;
    justify-content: center;
    gap: 32px;
    z-index: 999;
  }
  .nav__links.open a { font-size: 1.2rem; }

  .hero__content { max-width: 100%; }

  .stats__grid { grid-template-columns: repeat(2, 1fr); gap: 24px; }

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

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

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

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

  .footer__inner { flex-direction: column; gap: 32px; }
  .footer__nav ul { flex-wrap: wrap; gap: 16px; }

  .footer__bottom .container { flex-direction: column; gap: 8px; text-align: center; }
}

@media (max-width: 480px) {
  .stats__grid { grid-template-columns: 1fr 1fr; }
  .hero__actions { flex-direction: column; }
  .btn { width: 100%; justify-content: center; }
}