/* ===========================
   DESIGN SYSTEM
   =========================== */
:root {
  --color-primary: #0066FF;
  --color-primary-dark: #0047B3;
  --color-accent: #00D4AA;
  --color-bg: #0A0E1A;
  --color-bg-light: #0F1425;
  --color-bg-card: rgba(17, 24, 39, 0.6);
  --color-bg-card-hover: rgba(17, 24, 39, 0.85);
  --color-border: rgba(255, 255, 255, 0.06);
  --color-border-hover: rgba(0, 102, 255, 0.3);
  --color-text: #F1F5F9;
  --color-text-muted: #94A3B8;
  --color-text-dim: #64748B;
  --gradient-brand: linear-gradient(to right, #0066FF, #00D4AA);
  --gradient-hero: radial-gradient(ellipse at 30% 0%, rgba(0, 102, 255, 0.15) 0%, transparent 60%),
                   radial-gradient(ellipse at 70% 100%, rgba(0, 212, 170, 0.1) 0%, transparent 60%);
  --font: 'Inter', system-ui, -apple-system, sans-serif;
  --radius: 12px;
  --radius-lg: 20px;
  --shadow-card: 0 4px 32px rgba(0, 0, 0, 0.3);
  --shadow-glow: 0 0 40px rgba(0, 102, 255, 0.15);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===========================
   RESET & BASE
   =========================== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: var(--font);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: none; background: none; }

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===========================
   SECTION HEADINGS
   =========================== */
.section__label {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  color: transparent;
  display: inline-block;
  margin-bottom: 12px;
}

.section__title {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 48px;
}

/* ===========================
   BUTTONS
   =========================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  border-radius: 50px;
  transition: var(--transition);
  white-space: nowrap;
}

.btn--sm {
  padding: 8px 20px;
  font-size: 0.85rem;
}

.btn--lg {
  padding: 14px 32px;
  font-size: 1rem;
}

.btn--primary {
  background: var(--gradient-brand);
  color: #fff;
  box-shadow: 0 4px 20px rgba(0, 102, 255, 0.3);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 30px rgba(0, 102, 255, 0.45);
}

.btn--outline {
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: var(--color-text);
}

.btn--outline:hover {
  border-color: var(--color-primary);
  background: rgba(0, 102, 255, 0.1);
}

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

/* ===========================
   HEADER
   =========================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(10, 14, 26, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
  transition: var(--transition);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.header__logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo__icon {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
  line-height: 0;
}

.logo__icon svg {
  display: block;
}

.logo__text {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.header__nav {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav__link {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-muted);
  transition: var(--transition);
  position: relative;
}

.nav__link:hover { color: var(--color-text); }

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-brand);
  border-radius: 1px;
  transition: var(--transition);
}

.nav__link:hover::after { width: 100%; }

/* Burger */
.header__burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
}

.header__burger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: var(--transition);
}

/* ===========================
   HERO
   =========================== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
  background: var(--gradient-hero);
}

.hero__bg-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  animation: float 8s ease-in-out infinite;
}

.hero__bg-orb--1 {
  width: 500px;
  height: 500px;
  background: rgba(0, 102, 255, 0.15);
  top: -10%;
  left: -5%;
}

.hero__bg-orb--2 {
  width: 400px;
  height: 400px;
  background: rgba(0, 212, 170, 0.1);
  bottom: -10%;
  right: -5%;
  animation-delay: -4s;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(30px, -30px) scale(1.05); }
}

.hero__inner {
  position: relative;
  z-index: 1;
  padding: 160px 0 120px;
}

.hero__badge {
  display: inline-block;
  padding: 6px 16px;
  border: 1px solid rgba(0, 212, 170, 0.3);
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--color-accent);
  margin-bottom: 24px;
  letter-spacing: 0.05em;
}

.hero__title {
  font-size: clamp(2.5rem, 7vw, 5rem);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
  background: linear-gradient(180deg, #FFFFFF 0%, rgba(255, 255, 255, 0.7) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__subtitle {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--color-text-muted);
  max-width: 540px;
  margin: 0 auto 40px;
  line-height: 1.7;
}

/* ===========================
   ABOUT
   =========================== */
.about {
  padding: 120px 0;
}

.about__card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 40px;
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-card);
}

.about__card-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  padding: 20px 0;
  border-bottom: 1px solid var(--color-border);
}

.about__card-row:first-child { padding-top: 0; }
.about__card-row:last-child { border-bottom: none; padding-bottom: 0; }
.about__card-row--full { grid-template-columns: 1fr; }

.about__label {
  display: block;
  font-size: 0.78rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-dim);
  margin-bottom: 6px;
}

.about__value {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--color-text);
}

.about__value--mono {
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  letter-spacing: 0.05em;
  color: var(--color-accent);
}

.about__pin { flex-shrink: 0; }

/* ===========================
   SERVICES
   =========================== */
.services {
  padding: 120px 0;
  background: var(--color-bg-light);
}

.services__grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 24px;
}

.service-card:nth-child(-n+3) {
  grid-column: span 4;
}

.service-card:nth-child(n+4) {
  grid-column: span 6;
}

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

.service-card::before {
  content: '';
  display: block;
  height: 2px;
  background: var(--gradient-brand);
  border-radius: 1px;
  margin-bottom: 24px;
  transition: var(--transition);
}

.service-card:hover {
  background: var(--color-bg-card-hover);
  border-color: var(--color-border-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

.service-card:hover::before { height: 3px; }

.service-card__icon {
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius);
  background: rgba(0, 102, 255, 0.08);
  margin-bottom: 20px;
}

.service-card__title {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 10px;
}

.service-card__desc {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ===========================
   WHY US
   =========================== */
.why-us {
  padding: 120px 0;
}

.why-us__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  grid-auto-rows: 1fr;
}

.why-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 40px;
  transition: var(--transition);
}

.why-card:hover {
  border-color: var(--color-border-hover);
  box-shadow: var(--shadow-glow);
}

.why-card__number {
  font-size: 2.5rem;
  font-weight: 800;
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 16px;
  opacity: 0.85;
}

.why-card__title {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.why-card__desc {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ===========================
   CONTACT
   =========================== */
.contact {
  padding: 120px 0;
  background: var(--color-bg-light);
}

.contact__inner {
  text-align: center;
  position: relative;
  overflow: hidden;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 80px 40px;
}

.contact__bg-orb {
  position: absolute;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: rgba(0, 102, 255, 0.08);
  filter: blur(100px);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.contact__inner .section__label,
.contact__inner .section__title,
.contact__text,
.contact__inner .btn {
  position: relative;
  z-index: 1;
}

.contact__text {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  max-width: 480px;
  margin: -24px auto 36px;
  line-height: 1.7;
}

/* ===========================
   FOOTER
   =========================== */
.footer {
  padding: 48px 0;
  border-top: 1px solid var(--color-border);
}

.footer__inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: start;
  gap: 40px;
}

.footer__brand .logo__text {
  margin-bottom: 8px;
  display: block;
}

.footer__legal {
  font-size: 0.82rem;
  color: var(--color-text-dim);
  line-height: 1.6;
}

.footer__address {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  text-align: center;
}

.footer__copy {
  font-size: 0.8rem;
  color: var(--color-text-dim);
  text-align: right;
}

/* ===========================
   MODAL
   =========================== */
.modal {
  border: none;
  background: transparent;
  color: var(--color-text);
  color-scheme: dark;
  max-width: 480px;
  width: calc(100% - 48px);
  padding: 0;
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.modal::backdrop {
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.modal__content {
  background: var(--color-bg-light);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 40px;
  position: relative;
}

.modal__close {
  position: absolute;
  top: 16px;
  right: 16px;
  color: var(--color-text-muted);
  transition: var(--transition);
}

.modal__close:hover { color: var(--color-text); }

.modal__title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--color-text);
}

.modal__subtitle {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-bottom: 28px;
}

/* Form */
.form__group { margin-bottom: 20px; }

.form__label {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--color-text-muted);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.form__input {
  width: 100%;
  padding: 12px 16px;
  font-family: var(--font);
  font-size: 0.95rem;
  color: var(--color-text);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  outline: none;
  transition: var(--transition);
  resize: vertical;
}

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

.form__input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(0, 102, 255, 0.15);
}

.form__input.is-error {
  border-color: #EF4444;
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.15);
}

.form__textarea { min-height: 100px; }

.form__error {
  display: block;
  font-size: 0.78rem;
  color: #EF4444;
  margin-top: 4px;
  min-height: 18px;
}

/* Success */
.modal__success {
  text-align: center;
  padding: 20px 0;
}

.modal__success svg { margin: 0 auto 16px; }

/* ===========================
   SCROLL ANIMATIONS
   =========================== */
[data-animate] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ===========================
   RESPONSIVE
   =========================== */
@media (max-width: 960px) {
  .services__grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .service-card:nth-child(-n+3),
  .service-card:nth-child(n+4) {
    grid-column: span 1;
  }
}

@media (max-width: 768px) {
  /* Mobile nav */
  .header__burger { display: flex; }

  .header__nav {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    bottom: 0;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 24px;
    background: rgba(10, 14, 26, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    opacity: 0;
    pointer-events: none;
    transition: var(--transition);
  }

  .header__nav.is-open {
    opacity: 1;
    pointer-events: all;
  }

  .nav__link { font-size: 1.2rem; }

  /* Burger animation */
  .header__burger.is-active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }
  .header__burger.is-active span:nth-child(2) { opacity: 0; }
  .header__burger.is-active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }

  /* Grids */
  .services__grid { grid-template-columns: 1fr; }
  .why-us__grid { grid-template-columns: 1fr; }

  /* About */
  .about__card { padding: 24px; }
  .about__card-row { grid-template-columns: 1fr; gap: 20px; }

  /* Sections */
  .about, .services, .why-us, .contact { padding: 80px 0; }

  /* Contact */
  .contact__inner { padding: 48px 24px; }

  /* Footer */
  .footer__inner { grid-template-columns: 1fr; gap: 24px; }
  .footer__address,
  .footer__copy { text-align: left; }

  /* Hero */
  .hero__inner { padding: 120px 0 80px; }

  /* Modal */
  .modal__content { padding: 28px; }
}