/* ============================================================
   TRANSPARENT SCREENS – Main Stylesheet
   Design: Dark tech, electric blue accent, Inter typeface
   ============================================================ */

/* ---------- CSS Custom Properties ---------- */
:root {
  --bg:          #080808;
  --surface:     #111111;
  --surface-2:   #1a1a1a;
  --border:      rgba(255, 255, 255, 0.07);
  --accent:      #3b82f6;
  --accent-glow: rgba(59, 130, 246, 0.25);
  --highlight:   #06d6a0;
  --text-1:      #ffffff;
  --text-2:      #a1a1aa;
  --text-3:      #71717a;
  --radius:      12px;
  --radius-lg:   20px;
  --transition:  0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font:        'Inter', system-ui, sans-serif;
  --nav-h:       72px;
  --max-w:       1200px;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text-1);
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img, video { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font: inherit; }

/* ---------- Utility ---------- */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin-inline: auto;
  padding-inline: clamp(20px, 5vw, 60px);
}

/* ---------- Reveal animations ---------- */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.7s var(--transition), transform 0.7s var(--transition);
}
.reveal--delay-1 { transition-delay: 0.12s; }
.reveal--delay-2 { transition-delay: 0.24s; }
.reveal--delay-3 { transition-delay: 0.36s; }
.reveal.visible  { opacity: 1; transform: translateY(0); }

/* ---------- Shared typography ---------- */
.section-tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
}
.section-tag.center { display: block; text-align: center; }

.section-header {
  text-align: center;
  max-width: 680px;
  margin-inline: auto;
  margin-bottom: 64px;
}
.section-header h2 { margin-bottom: 16px; }
.section-sub {
  font-size: 18px;
  color: var(--text-2);
  line-height: 1.6;
}

h1, h2, h3, h4 {
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--text-1);
}
h1 { font-size: clamp(52px, 8vw, 96px); }
h2 { font-size: clamp(32px, 4.5vw, 52px); }
h3 { font-size: clamp(20px, 2.5vw, 26px); font-weight: 700; }

p { color: var(--text-2); line-height: 1.75; }
p strong { color: var(--text-1); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.01em;
  border-radius: 100px;
  padding: 12px 28px;
  transition: var(--transition);
  white-space: nowrap;
}
.btn--lg { padding: 16px 36px; font-size: 16px; }
.btn--sm { padding: 9px 20px; font-size: 14px; }
.btn--full { width: 100%; justify-content: center; }

.btn--primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 0 0 0 var(--accent-glow);
}
.btn--primary:hover {
  background: #2563eb;
  box-shadow: 0 0 32px var(--accent-glow);
  transform: translateY(-1px);
}

.btn--ghost {
  background: rgba(255,255,255,0.06);
  color: var(--text-1);
  border: 1px solid var(--border);
}
.btn--ghost:hover {
  background: rgba(255,255,255,0.12);
  border-color: rgba(255,255,255,0.15);
  transform: translateY(-1px);
}

.btn--outline {
  background: transparent;
  color: var(--text-1);
  border: 1px solid var(--border);
}
.btn--outline:hover {
  background: rgba(255,255,255,0.06);
  border-color: rgba(255,255,255,0.2);
}

/* ============================================================
   NAVIGATION
   ============================================================ */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: var(--nav-h);
  background: linear-gradient(to bottom, rgba(8,8,8,0.55) 0%, transparent 100%);
  transition: background var(--transition), backdrop-filter var(--transition), border-color var(--transition);
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  background: rgba(8, 8, 8, 0.88);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom-color: var(--border);
}
.nav__inner {
  display: flex;
  align-items: center;
  gap: 40px;
  height: 100%;
  max-width: var(--max-w);
  margin-inline: auto;
  padding-inline: clamp(20px, 5vw, 60px);
}
.nav__logo img { height: 36px; width: auto; }
.nav__links {
  display: flex;
  gap: 32px;
  margin-right: auto;
}
.nav__links a {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-2);
  transition: color var(--transition);
}
.nav__links a:hover { color: var(--text-1); }

/* Language switcher */
.lang-switcher {
  display: flex;
  gap: 2px;
  align-items: center;
  margin-right: 12px;
}
.lang-btn {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 18px;
  padding: 4px 5px;
  border-radius: 6px;
  opacity: 0.35;
  transition: opacity 0.2s, transform 0.15s;
  line-height: 1;
}
.lang-btn:hover  { opacity: 0.75; transform: scale(1.12); }
.lang-btn--active { opacity: 1; }

.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  margin-left: auto;
  padding: 8px;
}
.nav__hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-1);
  border-radius: 2px;
  transition: var(--transition);
}
.nav__hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__hamburger.open span:nth-child(2) { opacity: 0; }
.nav__hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.nav__mobile {
  display: none;
  flex-direction: column;
  background: rgba(8,8,8,0.97);
  backdrop-filter: blur(20px);
  padding: 24px clamp(20px, 5vw, 60px) 32px;
  border-top: 1px solid var(--border);
}
.nav__mobile.open { display: flex; }
.nav__mobile ul { display: flex; flex-direction: column; gap: 0; }
.nav__mobile a {
  display: block;
  padding: 14px 0;
  font-size: 20px;
  font-weight: 600;
  color: var(--text-2);
  border-bottom: 1px solid var(--border);
  transition: color var(--transition);
}
.nav__mobile a:hover { color: var(--text-1); }

/* ============================================================
   HERO
   ============================================================ */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.hero__video-wrap {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.hero__video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.9;
}
.hero__overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: rgba(0,0,0,0.50);

  /* Hex mesh: mask punches transparent holes through the dark background.
     Two offset hex rows combined with intersect = every hole position is truly transparent. */
  mask-image:
    radial-gradient(circle, black 7px, white 8px),
    radial-gradient(circle, black 7px, white 8px);
  mask-size: 18px 31px;
  mask-position: 0 0, 9px 15.5px;
  mask-composite: intersect;
  -webkit-mask-image:
    radial-gradient(circle, black 7px, white 8px),
    radial-gradient(circle, black 7px, white 8px);
  -webkit-mask-size: 18px 31px;
  -webkit-mask-position: 0 0, 9px 15.5px;
  -webkit-mask-composite: source-in;
}

/* Bottom fade: separate from mesh so it isn't affected by the mask */
.hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 50%;
  background: linear-gradient(to bottom, transparent, rgba(8,8,8,1));
  z-index: 2;
  pointer-events: none;
}

.hero__content {
  position: relative;
  z-index: 3;
  padding-top: calc(var(--nav-h) + 60px);
  padding-bottom: 100px;
  max-width: 820px;
}
.hero__tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--highlight);
  margin-bottom: 24px;
  padding: 6px 16px;
  border: 1px solid rgba(6, 214, 160, 0.3);
  border-radius: 100px;
  background: rgba(6, 214, 160, 0.06);
}
.hero__headline {
  margin-bottom: 28px;
  background: linear-gradient(135deg, #fff 0%, rgba(255,255,255,0.75) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero__sub {
  font-size: clamp(17px, 2vw, 21px);
  color: rgba(255,255,255,0.70);
  max-width: 580px;
  margin-bottom: 40px;
  line-height: 1.65;
}
.hero__sub strong { color: #fff; -webkit-text-fill-color: #fff; }
.hero__cta { display: flex; gap: 16px; flex-wrap: wrap; }
.hero__scroll {
  position: absolute;
  bottom: 36px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
  color: rgba(255,255,255,0.4);
  animation: bounce 2s infinite;
  transition: color var(--transition);
}
.hero__scroll:hover { color: rgba(255,255,255,0.8); }
@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50%       { transform: translateX(-50%) translateY(8px); }
}

/* ============================================================
   STATS
   ============================================================ */
.stats {
  background: var(--surface);
  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: 0;
}
.stat {
  text-align: center;
  padding: 24px 16px;
  position: relative;
}
.stat + .stat::before {
  content: '';
  position: absolute;
  left: 0; top: 20%; bottom: 20%;
  width: 1px;
  background: var(--border);
}
.stat__number {
  font-size: clamp(44px, 5vw, 64px);
  font-weight: 900;
  letter-spacing: -0.04em;
  color: var(--highlight);
  line-height: 1;
}
.stat__unit {
  font-size: clamp(24px, 3vw, 36px);
  font-weight: 700;
  color: var(--highlight);
}
.stat__label {
  font-size: 14px;
  color: var(--text-3);
  margin-top: 8px;
  font-weight: 500;
  letter-spacing: 0.03em;
}

/* ============================================================
   USE CASES
   ============================================================ */
.usecase {
  padding: 100px 0;
  border-bottom: 1px solid var(--border);
}
.usecase__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(40px, 6vw, 80px);
  align-items: center;
}
.usecase--reverse .usecase__media { order: -1; } /* image visually first on desktop */

.usecase__text h2 { margin-bottom: 20px; }
.usecase__text p  { margin-bottom: 28px; font-size: 17px; }

.usecase__bullets {
  margin-bottom: 36px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.usecase__bullets li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 15px;
  color: var(--text-2);
  font-weight: 500;
}
.usecase__bullets li::before {
  content: '';
  display: block;
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  margin-top: 3px;
  background: url("data:image/svg+xml,%3Csvg viewBox='0 0 18 18' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Ccircle cx='9' cy='9' r='8.5' stroke='%233b82f6' stroke-width='1'/%3E%3Cpath d='M5.5 9l2.5 2.5 4.5-5' stroke='%233b82f6' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center/contain no-repeat;
}

.usecase__media {
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4/3;
  background: var(--surface-2);
  position: relative;
}
.usecase__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}
.usecase__media:hover img { transform: scale(1.03); }

/* ============================================================
   BENEFITS
   ============================================================ */
.benefits {
  padding: 100px 0;
  background: var(--bg);
}
.benefits__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.benefit-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px 36px;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}
.benefit-card:hover {
  border-color: rgba(59, 130, 246, 0.35);
  transform: translateY(-4px);
  box-shadow: 0 24px 48px rgba(0,0,0,0.4), 0 0 0 1px rgba(59,130,246,0.1);
}
.benefit-card__icon {
  width: 48px;
  height: 48px;
  color: var(--accent);
  margin-bottom: 28px;
}
.benefit-card h3 { margin-bottom: 16px; }
.benefit-card p  { font-size: 15px; margin-bottom: 24px; }
.benefit-card__stat {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  color: var(--highlight);
  padding: 6px 14px;
  background: rgba(6, 214, 160, 0.08);
  border: 1px solid rgba(6, 214, 160, 0.2);
  border-radius: 100px;
  letter-spacing: 0.02em;
}

/* ============================================================
   CASE STUDIES
   ============================================================ */
.cases {
  padding: 100px 0;
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.cases__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.case-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}
.case-card:hover {
  border-color: rgba(59, 130, 246, 0.35);
  transform: translateY(-6px);
  box-shadow: 0 32px 64px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(59, 130, 246, 0.08);
}
.case-card__media {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
  background: var(--surface-2);
  flex-shrink: 0;
}
.case-card__media video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}
.case-card:hover .case-card__media video { transform: scale(1.04); }

.case-card__body {
  padding: 28px 28px 32px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.case-card__tag {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 10px;
}
.case-card__client {
  font-size: clamp(20px, 2vw, 24px);
  font-weight: 800;
  color: var(--text-1);
  letter-spacing: -0.02em;
  line-height: 1.2;
  display: block;
  margin-bottom: 10px;
}
.case-card__location {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 13px;
  color: var(--text-3);
  font-weight: 500;
  margin-bottom: 16px;
}
.case-card__location svg {
  width: 13px;
  height: 13px;
  flex-shrink: 0;
  color: var(--text-3);
}
.case-card__desc {
  font-size: 15px;
  color: var(--text-2);
  line-height: 1.65;
  margin-bottom: 0;
  flex: 1;
}
.case-card__stat {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  color: var(--highlight);
  padding: 5px 13px;
  background: rgba(6, 214, 160, 0.08);
  border: 1px solid rgba(6, 214, 160, 0.2);
  border-radius: 100px;
  letter-spacing: 0.03em;
  margin-top: 18px;
  align-self: flex-start;
}

/* ============================================================
   CTA BAND
   ============================================================ */
.cta-band {
  padding: 80px 0;
  background: linear-gradient(135deg, rgba(59,130,246,0.12) 0%, rgba(6,214,160,0.06) 100%);
  border-top: 1px solid rgba(59,130,246,0.2);
  border-bottom: 1px solid rgba(59,130,246,0.2);
}
.cta-band__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  flex-wrap: wrap;
}
.cta-band__inner h2 { font-size: clamp(24px, 3vw, 36px); margin-bottom: 8px; }
.cta-band__inner p  { color: var(--text-2); font-size: 17px; }

/* ============================================================
   CONTACT
   ============================================================ */
.contact {
  padding: 100px 0;
  background: var(--bg);
}
.contact__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(40px, 6vw, 80px);
  align-items: start;
}
.contact__text h2 { margin-bottom: 20px; }
.contact__text p  { margin-bottom: 36px; font-size: 17px; }
.contact__details {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.contact__link {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 16px;
  font-weight: 500;
  color: var(--text-2);
  transition: color var(--transition);
}
.contact__link svg { width: 20px; height: 20px; flex-shrink: 0; color: var(--accent); }
.contact__link:hover { color: var(--text-1); }

/* Form */
.contact__form {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.form-group { display: flex; flex-direction: column; gap: 8px; }
.form-group label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-2);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.form-group input,
.form-group textarea {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  font-size: 15px;
  font-family: var(--font);
  color: var(--text-1);
  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 input:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-success {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 20px;
  padding: 60px 40px;
  text-align: center;
}
.form-success svg {
  width: 52px;
  height: 52px;
  color: var(--highlight);
  flex-shrink: 0;
}
.form-success p {
  font-size: 18px;
  color: var(--text-1);
  font-weight: 500;
}
.field-error {
  font-size: 13px;
  color: #f87171;
  margin-top: 4px;
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
}
.footer__inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  padding-top: 60px;
  padding-bottom: 48px;
}
.footer__brand img  { height: 36px; width: auto; margin-bottom: 16px; }
.footer__brand p    { font-size: 14px; color: var(--text-3); max-width: 280px; }
.footer__nav h3     { font-size: 13px; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-3); margin-bottom: 16px; }
.footer__nav ul     { display: flex; flex-direction: column; gap: 10px; }
.footer__nav a      { font-size: 14px; color: var(--text-3); transition: color var(--transition); }
.footer__nav a:hover { color: var(--text-1); }
.footer__bottom {
  border-top: 1px solid var(--border);
  padding: 20px clamp(20px, 5vw, 60px);
  text-align: center;
}
.footer__bottom p { font-size: 13px; color: var(--text-3); }

/* ============================================================
   RESPONSIVE – Tablet (≤ 900px)
   ============================================================ */
@media (max-width: 900px) {
  .nav__links, .nav > .btn { display: none; }
  .nav__hamburger { display: flex; }

  .stats__grid { grid-template-columns: repeat(2, 1fr); }
  .stat + .stat::before { display: none; }
  .stat:nth-child(odd) { border-right: 1px solid var(--border); }

  .usecase__inner {
    grid-template-columns: 1fr;
  }
  .usecase--reverse .usecase__media { order: 0; }

  .benefits { padding: 60px 0; }
  .benefits__grid { grid-template-columns: 1fr; gap: 12px; }
  .benefit-card { padding: 24px; }
  .benefit-card__icon { width: 36px; height: 36px; margin-bottom: 16px; }

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

  .cta-band__inner { flex-direction: column; text-align: center; }

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

  .footer__inner { grid-template-columns: 1fr 1fr; }
  .footer__brand { grid-column: 1 / -1; }
}

/* ============================================================
   RESPONSIVE – Mobile (≤ 560px)
   ============================================================ */
@media (max-width: 560px) {
  .hero__cta { flex-direction: column; }
  .hero__cta .btn { width: 100%; justify-content: center; }

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

  .contact__form { padding: 28px 20px; }

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