/* =============================================
   ARCI NG — Style
   Elegant, Minimalist, Purple & Black
   ============================================= */

/* ---------- CSS Variables ---------- */
:root {
  --bg-primary: #0f0f1a;
  --bg-secondary: #141428;
  --bg-card: rgba(255, 255, 255, 0.03);
  --text-primary: #ffffff;
  --text-secondary: #a0a0b8;
  --accent: #7b2cbf;
  --accent-light: #9d4edd;
  --accent-glow: #c77dff;
  --accent-glow-soft: rgba(123, 44, 191, 0.25);
  --accent-glow-strong: rgba(157, 78, 221, 0.5);
  --border: rgba(123, 44, 191, 0.15);
  --border-hover: rgba(157, 78, 221, 0.4);
  --shadow-card: 0 20px 60px rgba(123, 44, 191, 0.08);
  --shadow-glow: 0 0 40px rgba(123, 44, 191, 0.3);
  --radius: 12px;
  --radius-lg: 20px;
  --transition: 0.4s cubic-bezier(0.25, 0.1, 0.25, 1);
  --transition-fast: 0.2s cubic-bezier(0.25, 0.1, 0.25, 1);
  --font-heading: 'Playfair Display', serif;
  --font-body: 'Inter', sans-serif;
  --max-width: 1200px;
  --header-height: 80px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

ul {
  list-style: none;
}

img {
  max-width: 100%;
  display: block;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 5%;
}

/* ---------- Typography ---------- */
.section-title {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  text-align: center;
  margin-bottom: 0.5rem;
  background: linear-gradient(135deg, var(--text-primary), var(--accent-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-subtitle {
  text-align: center;
  color: var(--text-secondary);
  font-size: 1.1rem;
  max-width: 600px;
  margin: 0 auto 4rem;
  font-weight: 300;
}

/* ---------- Header ---------- */
#header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  z-index: 1000;
  transition: background var(--transition), box-shadow var(--transition), backdrop-filter var(--transition);
}

#header.scrolled {
  background: rgba(15, 15, 26, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 1px 0 var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 5%;
  height: 100%;
}

.logo {
  font-family: var(--font-body);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 0.15em;
}

.nav-list {
  display: flex;
  gap: 2.5rem;
}

.nav-link {
  position: relative;
  font-size: 0.9rem;
  font-weight: 400;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
  letter-spacing: 0.03em;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1.5px;
  background: var(--accent-light);
  transition: width var(--transition);
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--text-primary);
}

.nav-link:hover::after,
.nav-link:focus-visible::after {
  width: 100%;
}

/* ---------- Mobile Menu ---------- */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  z-index: 1001;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: transform var(--transition-fast), opacity var(--transition-fast);
  transform-origin: center;
}

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

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

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

.mobile-menu {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  background: rgba(15, 15, 26, 0.97);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 999;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition), visibility var(--transition);
}

.mobile-menu.open {
  opacity: 1;
  visibility: visible;
}

.mobile-nav-list {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  text-align: center;
}

.mobile-link {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 600;
  color: var(--text-primary);
  transition: color var(--transition-fast);
}

.mobile-link:hover {
  color: var(--accent-light);
}

/* ---------- Hero Section ---------- */
.hero {
  position: relative;
  height: 100vh;
  min-height: 600px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 50% 0%, rgba(123, 44, 191, 0.25), transparent 60%),
    radial-gradient(ellipse 50% 50% at 80% 80%, rgba(157, 78, 221, 0.12), transparent 60%),
    radial-gradient(ellipse 40% 40% at 20% 30%, rgba(199, 125, 255, 0.08), transparent 60%);
  animation: heroPulse 8s ease-in-out infinite alternate;
}

@keyframes heroPulse {
  0% {
    opacity: 0.8;
    transform: scale(1);
  }
  100% {
    opacity: 1;
    transform: scale(1.05);
  }
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
  padding: 0 5%;
}

.hero-eyebrow {
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent-light);
  margin-bottom: 1.5rem;
}

.hero-title {
  font-family: var(--font-heading);
  font-size: clamp(2.5rem, 7vw, 4.5rem);
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 1.5rem;
}

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

.hero-desc {
  font-size: 1.15rem;
  color: var(--text-secondary);
  margin-bottom: 2.5rem;
  line-height: 1.8;
  font-weight: 300;
}

/* Scroll Indicator */
.scroll-indicator {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
}

.scroll-indicator span {
  display: block;
  width: 24px;
  height: 40px;
  border: 2px solid var(--text-secondary);
  border-radius: 12px;
  position: relative;
}

.scroll-indicator span::after {
  content: '';
  position: absolute;
  top: 6px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 8px;
  background: var(--accent-light);
  border-radius: 2px;
  animation: scrollBounce 2s ease-in-out infinite;
}

@keyframes scrollBounce {
  0%, 100% { top: 6px; opacity: 1; }
  50% { top: 18px; opacity: 0.3; }
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  padding: 1rem 2.5rem;
  border-radius: 50px;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: all var(--transition);
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-light));
  color: var(--text-primary);
  border: none;
  box-shadow: 0 4px 20px var(--accent-glow-soft);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px var(--accent-glow-strong);
}

/* ---------- Sections ---------- */
.section {
  padding: 7rem 0;
}

/* ---------- About ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 4rem;
  align-items: center;
  margin-top: 3rem;
}

.about-text p {
  color: var(--text-secondary);
  margin-bottom: 1.2rem;
  font-size: 1.05rem;
}

.about-text .lead {
  color: var(--text-primary);
  font-size: 1.25rem;
  line-height: 1.7;
  margin-bottom: 1.5rem;
  font-weight: 400;
}

.about-text strong {
  color: var(--text-primary);
  font-weight: 600;
}

.about-text em {
  color: var(--accent-light);
  font-style: italic;
}

.about-stats {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.stat {
  padding: 1.5rem 2rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  transition: all var(--transition);
}

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

.stat-number {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--accent-light);
}

.stat-label {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-top: 0.3rem;
}

/* ---------- Solutions Cards ---------- */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2.5rem 2rem;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 0%, var(--accent-glow-soft), transparent 70%);
  opacity: 0;
  transition: opacity var(--transition);
}

.card:hover {
  transform: translateY(-6px);
  border-color: var(--border-hover);
  box-shadow: var(--shadow-card), var(--shadow-glow);
}

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

.card-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-glow-soft);
  border-radius: 14px;
  margin-bottom: 1.5rem;
  color: var(--accent-light);
  position: relative;
  z-index: 1;
}

.card h3 {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  position: relative;
  z-index: 1;
}

.card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
  position: relative;
  z-index: 1;
}

/* ---------- Section Image / Decor ---------- */
.section-image {
  display: flex;
  justify-content: center;
  margin-bottom: 3rem;
}

.solutions-decor {
  width: 100%;
  max-width: 500px;
  height: auto;
}

/* ---------- Process Section ---------- */
.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  position: relative;
}

.step {
  text-align: center;
  padding: 2rem 1.5rem;
  position: relative;
}

.step-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-glow-soft);
  border-radius: 14px;
  margin: 0 auto 1rem;
  color: var(--accent-light);
}

.step-number {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 1rem;
  line-height: 1;
}

.step-line {
  width: 40px;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-light));
  margin: 0 auto 1.5rem;
  border-radius: 1px;
}

.step h3 {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

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

/* ---------- Footer ---------- */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding: 5rem 0 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1.3fr 1.3fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-brand p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-top: 1rem;
  line-height: 1.7;
}

.footer-grid h4 {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 1.25rem;
}

.footer-links ul,
.footer-contact ul {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-links a {
  color: var(--text-secondary);
  font-size: 0.95rem;
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--accent-light);
}

.footer-contact li {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.footer-contact li svg {
  flex-shrink: 0;
  color: var(--accent-light);
}

.social-icons {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.social-link {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  border-radius: 50%;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.social-link:hover {
  border-color: var(--accent-light);
  color: var(--accent-light);
  box-shadow: var(--shadow-glow);
  transform: translateY(-2px);
}

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}

.footer-bottom p {
  color: var(--text-secondary);
  font-size: 0.85rem;
}

/* ---------- Reveal Animations ---------- */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s cubic-bezier(0.25, 0.1, 0.25, 1),
              transform 0.8s cubic-bezier(0.25, 0.1, 0.25, 1);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Staggered delays */
.reveal:nth-child(1) { transition-delay: 0s; }
.reveal:nth-child(2) { transition-delay: 0.1s; }
.reveal:nth-child(3) { transition-delay: 0.2s; }
.reveal:nth-child(4) { transition-delay: 0.3s; }
.reveal:nth-child(5) { transition-delay: 0.4s; }
.reveal:nth-child(6) { transition-delay: 0.5s; }

.reveal.visible:nth-child(1) { transition-delay: 0s; }
.reveal.visible:nth-child(2) { transition-delay: 0.1s; }
.reveal.visible:nth-child(3) { transition-delay: 0.2s; }
.reveal.visible:nth-child(4) { transition-delay: 0.3s; }
.reveal.visible:nth-child(5) { transition-delay: 0.4s; }
.reveal.visible:nth-child(6) { transition-delay: 0.5s; }

/* ---------- Responsive / Tablet ---------- */
@media (max-width: 1024px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .about-stats {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 1rem;
  }

  .stat {
    flex: 1 1 140px;
  }

  .cards-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .process-steps {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }
}

/* ---------- Responsive / Mobile ---------- */
@media (max-width: 768px) {
  .nav-list {
    display: none;
  }

  .menu-toggle {
    display: flex;
  }

  .section {
    padding: 5rem 0;
  }

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

  .process-steps {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .about-stats {
    flex-direction: column;
  }
}

/* ---------- Reduced Motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .reveal {
    transition: opacity 0.3s ease;
    transform: none;
  }

  .hero-bg {
    animation: none;
  }

  .scroll-indicator span::after {
    animation: none;
  }

  .card:hover,
  .stat:hover,
  .btn:hover,
  .social-link:hover {
    transform: none;
  }
}