/* ================================
   ALTIS TECNOLOGIA — Design System
   ================================ */

:root {
  --bg:         #050D1A;
  --bg-2:       #091525;
  --bg-3:       #0C1D33;

  --blue:       #1564FF;
  --blue-dark:  #0D4ECC;
  --electric:   #00BFFF;
  --royal:      #1E5EFF;
  --purple:     #6B4EFF;
  --success:    #00D084;

  --text:       #F0F5FF;
  --muted:      #8A9DC0;
  --muted-2:    #5C7499;

  --border:        rgba(30, 94, 255, 0.12);
  --border-hover:  rgba(0, 191, 255, 0.25);

  --grad-brand: linear-gradient(135deg, #6B4EFF 0%, #1E5EFF 45%, #00BFFF 100%);
  --grad-text:  linear-gradient(135deg, #1E5EFF 0%, #00BFFF 100%);

  --r-sm: 8px;
  --r:    12px;
  --r-lg: 16px;
  --r-xl: 24px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  line-height: 1.6;
  overflow-x: hidden;
}

::selection { background: rgba(21, 100, 255, 0.2); color: var(--text); }

::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: rgba(21, 100, 255, 0.3); border-radius: 3px; }

/* ── Typography ── */
.gradient-text {
  background: var(--grad-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--electric);
}
.label::before {
  content: '';
  display: block;
  width: 20px;
  height: 1px;
  background: rgba(0, 191, 255, 0.55);
  flex-shrink: 0;
}

/* ── Layout ── */
.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 4vw, 2.5rem);
}

/* ── Navbar ── */
.navbar {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  border-bottom: 1px solid transparent;
  transition: background 0.3s, border-color 0.3s;
}
.navbar.scrolled {
  background: rgba(5, 13, 26, 0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom-color: var(--border);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 2rem;
}
.nav-logo img { height: 30px; width: auto; object-fit: contain; display: block; }
.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}
.nav-links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.875rem;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--text); }

.btn-nav {
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 1.25rem;
  border: 1px solid rgba(0, 191, 255, 0.3);
  border-radius: var(--r-sm);
  color: var(--electric);
  text-decoration: none;
  font-size: 0.8125rem;
  font-weight: 500;
  transition: border-color 0.2s, background 0.2s;
  white-space: nowrap;
}
.btn-nav:hover {
  border-color: var(--electric);
  background: rgba(0, 191, 255, 0.05);
}

.hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--muted);
  padding: 4px;
  transition: color 0.2s;
}
.hamburger:hover { color: var(--text); }

.mobile-menu {
  display: none;
  flex-direction: column;
  gap: 0.875rem;
  padding: 1rem 0 1.5rem;
  border-top: 1px solid var(--border);
}
.mobile-menu.open { display: flex; }
.mobile-menu a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.9375rem;
  transition: color 0.2s;
}
.mobile-menu a:hover { color: var(--text); }

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.875rem 2rem;
  border-radius: var(--r-sm);
  font-size: 0.9375rem;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s;
  border: none;
  white-space: nowrap;
}
.btn-primary {
  background: var(--blue);
  color: #fff;
  border: 1px solid transparent;
}
.btn-primary:hover { background: var(--blue-dark); transform: translateY(-1px); }

.btn-outline {
  background: transparent;
  color: var(--electric);
  border: 1px solid rgba(0, 191, 255, 0.3);
}
.btn-outline:hover { border-color: var(--electric); background: rgba(0, 191, 255, 0.05); }

.btn-lg { padding: 1rem 2.25rem; font-size: 1rem; }

/* ── Hero ── */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 7rem 0 5rem;
  overflow: hidden;
  background: var(--bg);
}

/* Grid pattern */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(21, 100, 255, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(21, 100, 255, 0.055) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(ellipse 75% 65% at 55% 45%, black 20%, transparent 85%);
  -webkit-mask-image: radial-gradient(ellipse 75% 65% at 55% 45%, black 20%, transparent 85%);
}
/* Ambient glow */
.hero::after {
  content: '';
  position: absolute;
  top: 15%;
  right: 10%;
  width: 700px;
  height: 700px;
  background: radial-gradient(circle, rgba(30, 94, 255, 0.07) 0%, transparent 65%);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 4rem;
  align-items: center;
  width: 100%;
}

.hero-copy { max-width: 680px; }

.hero-eyebrow { margin-bottom: 2rem; }

.hero-title {
  font-size: clamp(3rem, 6.5vw, 5.25rem);
  font-weight: 800;
  line-height: 1.02;
  letter-spacing: -0.04em;
  color: var(--text);
  margin-bottom: 1.75rem;
}

.hero-sub {
  font-size: clamp(1rem, 1.4vw, 1.15rem);
  color: var(--muted);
  line-height: 1.75;
  max-width: 520px;
  margin-bottom: 2.5rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.875rem;
  margin-bottom: 2.5rem;
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.375rem 0.875rem;
  border-radius: 100px;
  border: 1px solid var(--border);
  background: rgba(21, 100, 255, 0.04);
  font-size: 0.75rem;
  color: var(--muted);
}
.badge svg { color: var(--electric); flex-shrink: 0; }

/* Hero visual: brand mark large + subtle node diagram */
.hero-visual {
  position: relative;
  width: 400px;
  height: 400px;
  flex-shrink: 0;
}
.hero-mark-bg {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}
.hero-mark-bg img {
  width: 340px;
  height: 340px;
  object-fit: contain;
  opacity: 0.055;
  mix-blend-mode: screen;
  filter: brightness(2.5) saturate(1.5);
}

/* Subtle orbit rings */
.hero-ring {
  position: absolute;
  border-radius: 50%;
  border: 1px solid rgba(21, 100, 255, 0.12);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  animation: spin 25s linear infinite;
}
.hero-ring:nth-child(2) { width: 280px; height: 280px; animation-duration: 20s; border-style: dashed; border-color: rgba(0, 191, 255, 0.08); }
.hero-ring:nth-child(3) { width: 380px; height: 380px; animation-duration: 35s; animation-direction: reverse; }

/* Orbital dots */
.hero-dot {
  position: absolute;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--electric);
  box-shadow: 0 0 8px var(--electric);
  top: 50%;
  left: 50%;
  animation: orbit 8s linear infinite;
}
.hero-dot:nth-child(4) { animation-delay: -2s; }
.hero-dot:nth-child(5) { animation-delay: -5s; background: var(--purple); box-shadow: 0 0 8px var(--purple); animation-duration: 12s; }
.hero-dot:nth-child(6) { animation-delay: -8s; animation-duration: 6s; background: var(--blue); box-shadow: 0 0 8px var(--blue); }

/* Center node */
.hero-center {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--bg-2);
  border: 2px solid rgba(21, 100, 255, 0.5);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 30px rgba(21, 100, 255, 0.2);
}
.hero-center-text { font-size: 8px; font-weight: 700; letter-spacing: 2px; color: var(--text); }
.hero-center-sub  { font-size: 6px; letter-spacing: 1.5px; color: var(--electric); margin-top: 1px; }

/* Node labels */
.hero-node {
  position: absolute;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}
.hero-node-circle {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--bg-2);
  border: 1px solid rgba(21, 100, 255, 0.35);
  display: flex;
  align-items: center;
  justify-content: center;
}
.hero-node-label {
  font-size: 9px;
  color: var(--muted-2);
  white-space: nowrap;
  font-weight: 500;
  letter-spacing: 0.03em;
}
.node-bc  { top: 0;   left: 50%; transform: translateX(-50%); }
.node-b   { top: 30%; left: -8%; }
.node-f   { top: 30%; right: -8%; }
.node-e   { bottom: 2%; left: 18%; }
.node-em  { bottom: 2%; right: 18%; }

@keyframes spin {
  from { transform: translate(-50%, -50%) rotate(0deg); }
  to   { transform: translate(-50%, -50%) rotate(360deg); }
}

@keyframes orbit {
  0%   { transform: translate(calc(-50% + 140px * cos(0deg)),  calc(-50% + 140px * sin(0deg))); }
  25%  { transform: translate(calc(-50% + 140px * cos(90deg)), calc(-50% + 140px * sin(90deg))); }
  50%  { transform: translate(calc(-50% + 140px * cos(180deg)),calc(-50% + 140px * sin(180deg))); }
  75%  { transform: translate(calc(-50% + 140px * cos(270deg)),calc(-50% + 140px * sin(270deg))); }
  100% { transform: translate(calc(-50% + 140px * cos(360deg)),calc(-50% + 140px * sin(360deg))); }
}

/* ── Stats Bar ── */
.stats-bar {
  background: var(--bg-2);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 2.5rem 0;
}
.stats-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
}
.stat-item {
  text-align: center;
  padding: 0 2rem;
}
.stat-item + .stat-item { border-left: 1px solid var(--border); }
.stat-value {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--text);
  line-height: 1;
  margin-bottom: 0.375rem;
}
.stat-label { font-size: 0.8125rem; color: var(--muted); }

/* ── Sections ── */
section { padding: clamp(4rem, 7vw, 6.5rem) 0; }
.bg-dark    { background: var(--bg); }
.bg-surface { background: var(--bg-2); }

.sec-header { margin-bottom: 3.5rem; }
.sec-header .label { margin-bottom: 1.25rem; }
.sec-title {
  font-size: clamp(1.75rem, 3vw, 2.75rem);
  font-weight: 600;
  letter-spacing: -0.025em;
  line-height: 1.15;
  color: var(--text);
}

/* ── Quem Somos ── */
.qs-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: start;
}

.stats-mini {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  padding-bottom: 2rem;
  margin-bottom: 2rem;
  border-bottom: 1px solid var(--border);
}
.sm-val  { font-size: 1.375rem; font-weight: 700; letter-spacing: -0.02em; color: var(--text); margin-bottom: 0.125rem; }
.sm-lbl  { font-size: 0.75rem; color: var(--muted); line-height: 1.4; }

.expert-card {
  padding: 1.375rem;
  border-radius: var(--r);
  border: 1px solid var(--border);
  background: rgba(5, 13, 26, 0.45);
  margin-bottom: 0.875rem;
}
.expert-card:last-child { margin-bottom: 0; }

.expert-head { display: flex; align-items: center; gap: 0.75rem; margin-bottom: 0.875rem; }
.expert-ico {
  width: 36px; height: 36px;
  border-radius: 8px;
  background: rgba(21, 100, 255, 0.1);
  display: flex; align-items: center; justify-content: center;
  color: var(--electric);
  flex-shrink: 0;
}
.expert-role { font-size: 0.875rem; font-weight: 600; color: var(--text); }
.expert-desc { font-size: 0.75rem; color: var(--muted); margin-top: 1px; }

.expert-list { list-style: none; display: flex; flex-direction: column; gap: 0.4rem; }
.expert-list li {
  display: flex; align-items: center; gap: 0.5rem;
  font-size: 0.875rem; color: var(--muted);
}
.expert-list li::before {
  content: '';
  display: block; width: 13px; height: 13px;
  border-radius: 50%;
  border: 1.5px solid var(--success);
  background: rgba(0, 208, 132, 0.08)
    url("data:image/svg+xml,%3Csvg width='7' height='5' viewBox='0 0 7 5' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 2.5L2.8 4.2L6 1' stroke='%2300D084' stroke-width='1.25' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E")
    no-repeat center;
  flex-shrink: 0;
}

.qs-copy { padding-top: 0.5rem; }
.qs-copy .sec-title { margin: 1.25rem 0 2rem; }
.qs-text { display: flex; flex-direction: column; gap: 1.25rem; }
.qs-text p { font-size: 1rem; color: var(--muted); line-height: 1.75; }

/* ── Soluções ── */
.sol-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.125rem;
}
.sol-featured { grid-row: span 2; }

.card {
  padding: 1.75rem;
  border-radius: var(--r-lg);
  border: 1px solid var(--border);
  background: var(--bg-2);
  position: relative;
  overflow: hidden;
  transition: border-color 0.25s, transform 0.25s, box-shadow 0.25s;
  cursor: default;
}
.card:hover {
  border-color: rgba(0, 191, 255, 0.22);
  transform: translateY(-3px);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.25);
}
.card::after {
  content: '';
  position: absolute;
  left: 0; top: 1.5rem; bottom: 1.5rem;
  width: 2px;
  background: var(--electric);
  border-radius: 0 2px 2px 0;
  opacity: 0;
  transition: opacity 0.25s;
}
.card:hover::after { opacity: 1; }

.card-ico {
  width: 44px; height: 44px;
  border-radius: 10px;
  background: rgba(21, 100, 255, 0.1);
  border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 1.375rem;
  color: var(--electric);
}
.sol-featured .card-ico { width: 50px; height: 50px; border-radius: 12px; }

.card-tag {
  font-size: 0.6875rem; font-weight: 600;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--royal); margin-bottom: 0.625rem;
}
.card h3 {
  font-size: 1.0625rem; font-weight: 600;
  letter-spacing: -0.01em; color: var(--text);
  margin-bottom: 0.625rem;
}
.sol-featured h3 { font-size: 1.35rem; margin-bottom: 0.875rem; }
.card p { font-size: 0.9375rem; color: var(--muted); line-height: 1.65; }
.sol-featured p { font-size: 1rem; }

.card-detail {
  margin-top: 1.125rem; padding-top: 1.125rem;
  border-top: 1px solid var(--border);
  font-size: 0.875rem; color: rgba(138,157,192,0.65); line-height: 1.65;
}
.card-link {
  display: inline-flex; align-items: center; gap: 0.35rem;
  margin-top: 1.5rem;
  font-size: 0.875rem; color: var(--electric);
  text-decoration: none;
  transition: gap 0.2s;
}
.card-link:hover { gap: 0.55rem; }

.card-sm { padding: 1.375rem; }
.card-sm .card-ico { width: 38px; height: 38px; margin-bottom: 1rem; }
.card-sm h3 { font-size: 0.9375rem; margin-bottom: 0.375rem; }
.card-sm p  { font-size: 0.875rem; }

/* ── Diferenciais ── */
.diff-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.125rem;
}
.diff-card {
  padding: 1.375rem;
  border-radius: var(--r);
  border: 1px solid var(--border);
  background: rgba(5, 13, 26, 0.4);
  transition: border-color 0.2s;
}
.diff-card:hover { border-color: rgba(21, 100, 255, 0.22); }
.diff-ico {
  width: 38px; height: 38px;
  border-radius: 8px;
  background: rgba(21, 100, 255, 0.1);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 0.875rem;
  color: var(--electric);
}
.diff-title { font-size: 0.875rem; font-weight: 600; color: var(--text); margin-bottom: 0.375rem; line-height: 1.4; }
.diff-desc  { font-size: 0.8125rem; color: var(--muted); line-height: 1.6; }

/* ── Tecnologia ── */
.tech-stack { margin-top: 1rem; }
.tech-row {
  display: flex; align-items: flex-start; flex-wrap: wrap; gap: 0.75rem 2rem;
  padding: 1.625rem 0;
  border-bottom: 1px solid rgba(21, 100, 255, 0.06);
}
.tech-row:first-child { border-top: 1px solid rgba(21, 100, 255, 0.06); }
.tech-cat {
  font-size: 0.6875rem; font-weight: 600;
  letter-spacing: 0.14em; text-transform: uppercase;
  color: rgba(138, 157, 192, 0.45);
  width: 100px; flex-shrink: 0; padding-top: 0.25rem;
}
.tech-pills { display: flex; flex-wrap: wrap; gap: 0.4rem; flex: 1; }
.pill {
  padding: 0.3125rem 0.8125rem;
  border-radius: 100px; border: 1px solid;
  font-size: 0.75rem; font-weight: 500;
  transition: transform 0.15s; cursor: default;
}
.pill:hover { transform: scale(1.04); }
.p-el  { color: var(--electric); border-color: rgba(0,191,255,0.28); background: rgba(0,191,255,0.05); }
.p-bl  { color: #60A5FA; border-color: rgba(96,165,250,0.28); background: rgba(96,165,250,0.05); }
.p-pu  { color: #A78BFA; border-color: rgba(167,139,250,0.28); background: rgba(167,139,250,0.05); }
.p-gr  { color: var(--success); border-color: rgba(0,208,132,0.28); background: rgba(0,208,132,0.05); }
.p-or  { color: #FB923C; border-color: rgba(251,146,60,0.28); background: rgba(251,146,60,0.05); }
.p-mu  { color: var(--muted); border-color: rgba(138,157,192,0.18); background: rgba(138,157,192,0.05); }

/* ── Por Que Altis ── */
.reasons { display: flex; flex-direction: column; }
.reason {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 3rem;
  padding: 2rem 0;
  border-bottom: 1px solid rgba(21, 100, 255, 0.07);
  transition: border-color 0.25s;
}
.reason:last-child { border-bottom: none; }
.reason:hover { border-bottom-color: rgba(21, 100, 255, 0.2); }

.reason-val {
  font-size: 1.5rem; font-weight: 700;
  letter-spacing: -0.025em; color: var(--text);
  transition: color 0.25s;
}
.reason:hover .reason-val { color: var(--electric); }
.reason-sub {
  font-size: 0.625rem; font-weight: 600;
  letter-spacing: 0.15em; text-transform: uppercase;
  color: rgba(138, 157, 192, 0.4); margin-top: 2px;
}
.reason-title { font-size: 1rem; font-weight: 600; color: var(--text); margin-bottom: 0.375rem; }
.reason-desc  { font-size: 0.9375rem; color: var(--muted); line-height: 1.65; }

/* ── CTA Final ── */
.cta-sec {
  position: relative;
  text-align: center;
  overflow: hidden;
  background: var(--bg);
}
.cta-sec::before {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(ellipse 70% 55% at 50% 50%, rgba(21,100,255,0.065) 0%, transparent 70%);
  pointer-events: none;
}
.cta-sec::after {
  content: '';
  position: absolute; top: 0; left: 12%; right: 12%; height: 1px;
  background: linear-gradient(to right, transparent, rgba(21,100,255,0.28), transparent);
}
.cta-inner { position: relative; max-width: 660px; margin: 0 auto; }
.cta-title { font-size: clamp(1.75rem, 3vw, 2.5rem); font-weight: 600; letter-spacing: -0.025em; color: var(--text); margin-bottom: 1.125rem; }
.cta-sub   { font-size: 1.0625rem; color: var(--muted); line-height: 1.7; max-width: 500px; margin: 0 auto 2.5rem; }
.cta-btns  { display: flex; flex-wrap: wrap; justify-content: center; gap: 0.875rem; margin-bottom: 2rem; }

.cta-contacts {
  display: flex; flex-wrap: wrap; justify-content: center;
  align-items: center; gap: 1.5rem;
  font-size: 0.875rem; color: rgba(138, 157, 192, 0.45);
}
.cta-c-link {
  display: flex; align-items: center; gap: 0.375rem;
  color: rgba(138, 157, 192, 0.45);
  text-decoration: none;
  transition: color 0.2s;
}
.cta-c-link:hover { color: var(--text); }
.cta-divider { width: 1px; height: 14px; background: var(--border); }

/* ── Footer ── */
footer {
  background: var(--bg);
  border-top: 1px solid var(--border);
  padding: 4rem 0 2rem;
}
.foot-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1.25fr;
  gap: 3rem;
  margin-bottom: 3rem;
}
.foot-logo { height: 26px; width: auto; object-fit: contain; margin-bottom: 1rem; display: block; }
.foot-tag  { font-size: 0.875rem; color: var(--muted); max-width: 200px; line-height: 1.65; margin-bottom: 0.625rem; }
.foot-dom  { font-size: 0.75rem; color: rgba(138, 157, 192, 0.35); font-family: monospace; }

.foot-col h4 {
  font-size: 0.6875rem; font-weight: 600;
  letter-spacing: 0.15em; text-transform: uppercase;
  color: rgba(138, 157, 192, 0.35); margin-bottom: 1.25rem;
}
.foot-links { list-style: none; display: flex; flex-direction: column; gap: 0.7rem; }
.foot-links a { font-size: 0.875rem; color: var(--muted); text-decoration: none; transition: color 0.2s; }
.foot-links a:hover { color: var(--text); }

.foot-contacts { display: flex; flex-direction: column; gap: 0.875rem; }
.foot-c {
  display: flex; align-items: center; gap: 0.5rem;
  font-size: 0.875rem; color: var(--muted);
  text-decoration: none;
  transition: color 0.2s;
}
.foot-c:hover { color: var(--text); }

.foot-bottom {
  padding-top: 2rem;
  border-top: 1px solid rgba(21, 100, 255, 0.06);
  display: flex; justify-content: space-between;
  align-items: center; gap: 1rem; flex-wrap: wrap;
}
.foot-copy { font-size: 0.75rem; color: rgba(138, 157, 192, 0.3); }
.foot-meta { font-size: 0.75rem; color: rgba(138, 157, 192, 0.2); }

/* ── Language Switcher ── */
.lang-sw {
  display: flex;
  align-items: center;
  gap: 2px;
}
.lang-btn {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--muted-2);
  padding: 0.25rem 0.4rem;
  border-radius: 4px;
  transition: color 0.2s, background 0.2s;
  font-family: 'Inter', system-ui, sans-serif;
}
.lang-btn:hover { color: var(--text); }
.lang-btn.active { color: var(--electric); background: rgba(0,191,255,0.07); }

.mobile-lang-sw {
  display: flex;
  gap: 0.5rem;
  padding-top: 0.5rem;
  border-top: 1px solid var(--border);
}

.stat-unit { font-size: .55em; font-weight: 500; color: var(--muted); }
.sm-unit   { font-size: .7em; }

/* ── Scroll Animations ── */
.anim {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.anim.visible { opacity: 1; transform: translateY(0); }
.anim-fade { opacity: 0; transition: opacity 0.5s ease; }
.anim-fade.visible { opacity: 1; }

.d1 { transition-delay: 0.08s; }
.d2 { transition-delay: 0.16s; }
.d3 { transition-delay: 0.24s; }
.d4 { transition-delay: 0.32s; }
.d5 { transition-delay: 0.40s; }

/* ── Responsive ── */
@media (max-width: 1024px) {
  .diff-grid { grid-template-columns: repeat(2, 1fr); }
  .qs-grid   { gap: 3rem; }
  .hero-visual { width: 320px; height: 320px; }
}

@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-visual { display: none; }
  .qs-grid    { grid-template-columns: 1fr; }
  .sol-grid   { grid-template-columns: 1fr; }
  .sol-featured { grid-row: span 1; }
}

@media (max-width: 768px) {
  .nav-links, .btn-nav { display: none; }
  .hamburger { display: flex; }

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

  .reason { grid-template-columns: 1fr; gap: 0.5rem; }
  .reason-metric { display: flex; align-items: baseline; gap: 0.625rem; }

  .foot-grid { grid-template-columns: 1fr; gap: 2rem; }
  .stats-row { grid-template-columns: 1fr; }
  .stat-item + .stat-item { border-left: none; border-top: 1px solid var(--border); padding-top: 1.5rem; margin-top: 1.5rem; }

  .tech-row { flex-direction: column; gap: 0.75rem; }
  .tech-cat { width: auto; }
}

@media (max-width: 520px) {
  .diff-grid { grid-template-columns: 1fr; }
  .hero-badges { gap: 0.4rem; }
}