/* ============================================================
   Nexion — Components: logo, header, buttons, cards, footer, forms
   ============================================================ */

/* ---------------- Logo ----------------
   Actual artwork from logo/nexion-x-small-dot.svg, inlined so it stays
   theme-adaptive: ink elements (letters + back bar) flip with --logo-ink,
   the indigo bar + dot stay #4A5CF0. Sized to match the previous logo. */
.logo {
  display: inline-flex;
  align-items: center;
  line-height: 1;
  user-select: none;
}

.logo-mark {
  display: block;
  width: auto;
  height: 1.77rem;
}

.logo-mark .logo-ink {
  fill: var(--logo-ink);
}

.logo-lg .logo-mark {
  height: 2.4rem;
}

/* ---------------- Header / Nav ---------------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-h);
  transition: background-color var(--dur), border-color var(--dur), backdrop-filter var(--dur);
  border-bottom: 1px solid transparent;
}

.site-header.scrolled {
  background: var(--glass);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  backdrop-filter: blur(14px) saturate(140%);
  border-bottom-color: var(--border);
}

.nav-wrap {
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.nav {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav-links a {
  display: inline-block;
  padding: 0.5rem 0.9rem;
  font-size: var(--fs-small);
  font-weight: 500;
  color: var(--text-muted);
  border-radius: var(--r-pill);
  transition: color var(--dur), background-color var(--dur);
}

.nav-links a:hover {
  color: var(--text);
}

.nav-links a[aria-current="page"] {
  color: var(--text);
  background: var(--accent-soft);
}

.nav-links a.nav-cta {
  color: #fcfcfc;
  background: var(--accent);
  margin-left: 0.5rem;
  box-shadow: 0 0 20px var(--glow);
  transition: background-color var(--dur), box-shadow var(--dur), transform var(--dur);
}

.nav-links a.nav-cta:hover {
  background: var(--accent-bright);
  box-shadow: 0 0 32px var(--glow);
}

.nav-controls {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

/* Language toggle pill */
.lang-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.4rem 0.75rem;
  font-size: var(--fs-tiny);
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  border: 1px solid var(--border-strong);
  border-radius: var(--r-pill);
  transition: border-color var(--dur), color var(--dur);
}

.lang-toggle:hover {
  border-color: var(--accent);
}

.lang-toggle .lang-sep {
  opacity: 0.4;
}

.lang-toggle [data-lang-opt] {
  opacity: 0.45;
  transition: opacity var(--dur), color var(--dur);
}

.lang-toggle [data-lang-opt].active {
  opacity: 1;
  color: var(--accent-bright);
}

/* Theme toggle (sun/moon) */
.theme-toggle {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border: 1px solid var(--border-strong);
  border-radius: 50%;
  color: var(--text-muted);
  transition: border-color var(--dur), color var(--dur), transform var(--dur);
}

.theme-toggle:hover {
  border-color: var(--accent);
  color: var(--text);
}

.theme-toggle svg {
  position: absolute;
  width: 18px;
  height: 18px;
  transition: opacity var(--dur), transform 0.5s var(--ease-out);
}

.theme-toggle .icon-sun {
  opacity: 0;
  transform: rotate(-90deg) scale(0.5);
}

.theme-toggle .icon-moon {
  opacity: 1;
  transform: rotate(0) scale(1);
}

[data-theme="light"] .theme-toggle .icon-sun {
  opacity: 1;
  transform: rotate(0) scale(1);
}

[data-theme="light"] .theme-toggle .icon-moon {
  opacity: 0;
  transform: rotate(90deg) scale(0.5);
}

/* Burger (mobile) */
.nav-burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  padding: 10px;
  border: 1px solid var(--border-strong);
  border-radius: var(--r-sm);
}

.nav-burger span {
  display: block;
  height: 2px;
  width: 100%;
  border-radius: 2px;
  background: var(--text);
  transition: transform var(--dur) var(--ease-out), opacity var(--dur);
}

.nav-burger[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-burger[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav-burger[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

@media (max-width: 899px) {
  .nav-burger {
    display: flex;
  }

  /* Page scroll locks while the menu is open */
  html.nav-open {
    overflow: hidden;
  }

  /* Header goes solid while the menu is open. Deliberately NO
     backdrop-filter here: a filtered header becomes the backdrop root
     for the fixed .nav inside it, which would stop the overlay's own
     backdrop blur from sampling the page behind. */
  html.nav-open .site-header,
  html.nav-open .site-header.scrolled {
    background: var(--bg);
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
    border-bottom-color: var(--border);
  }

  /* Full-screen overlay menu.
     NOTE: sized with height (not inset/bottom) on purpose — the header's
     backdrop-filter makes it the containing block for this fixed child,
     so bottom:0 would resolve against the 76px header, not the viewport. */
  .nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    height: calc(100vh - var(--header-h));
    height: calc(100dvh - var(--header-h));
    flex-direction: column;
    align-items: stretch;
    justify-content: space-between;
    gap: 2rem;
    padding: clamp(1.5rem, 5vh, 3rem) clamp(1.25rem, 6vw, 3rem) max(1.5rem, env(safe-area-inset-bottom, 0px) + 1.25rem);
    overflow-y: auto;
    overscroll-behavior: contain;
    /* Near-solid so page content can't bleed through; the blur only
       polishes the remaining few percent (solid fallback first). */
    background: var(--bg);
    background: color-mix(in srgb, var(--bg) 92%, transparent);
    -webkit-backdrop-filter: blur(20px) saturate(150%);
    backdrop-filter: blur(20px) saturate(150%);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--dur) var(--ease-out), visibility var(--dur);
  }

  .nav.open {
    opacity: 1;
    visibility: visible;
  }

  .nav-links {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    counter-reset: nav-item;
  }

  /* Staggered rise-in per item (delays only while opening,
     so closing is instant) */
  .nav-links li {
    counter-increment: nav-item;
    opacity: 0;
    transform: translateY(14px);
    transition: opacity 0.45s var(--ease-out), transform 0.45s var(--ease-out);
  }

  .nav.open .nav-links li {
    opacity: 1;
    transform: none;
  }

  .nav.open .nav-links li:nth-child(1) { transition-delay: 0.05s; }
  .nav.open .nav-links li:nth-child(2) { transition-delay: 0.11s; }
  .nav.open .nav-links li:nth-child(3) { transition-delay: 0.17s; }
  .nav.open .nav-links li:nth-child(4) { transition-delay: 0.23s; }
  .nav.open .nav-links li:nth-child(5) { transition-delay: 0.29s; }

  .nav-links a {
    display: flex;
    align-items: baseline;
    gap: 1rem;
    padding: 1rem 0.25rem;
    font-size: clamp(1.35rem, 5.5vw, 1.7rem);
    font-weight: 500;
    letter-spacing: -0.01em;
    color: var(--text);
    background: none;
    border-radius: 0;
    border-bottom: 1px solid var(--border);
  }

  /* 01–04 index, echoing the services-section eyebrows */
  .nav-links a::before {
    content: "0" counter(nav-item);
    font-size: var(--fs-tiny);
    font-weight: 600;
    letter-spacing: 0.12em;
    color: var(--text-muted);
    transition: color var(--dur);
  }

  .nav-links a[aria-current="page"] {
    background: none;
    color: var(--accent-bright);
  }

  .nav-links a[aria-current="page"]::before {
    color: var(--accent-bright);
  }

  /* Contact becomes a full-width primary button */
  .nav-links a.nav-cta {
    justify-content: center;
    margin: 1.5rem 0 0;
    padding: 0.95rem 1rem;
    font-size: 1.05rem;
    color: #fcfcfc;
    background: var(--grad-brand);
    border-bottom: none;
    border-radius: var(--r-pill);
    box-shadow: 0 4px 24px var(--glow);
  }

  .nav-links a.nav-cta::before {
    content: none;
  }

  .nav-controls {
    justify-content: space-between;
    padding-top: 1.25rem;
    border-top: 1px solid var(--border);
  }

  /* Larger touch targets */
  .lang-toggle {
    padding: 0.55rem 1.1rem;
  }

  .theme-toggle {
    width: 42px;
    height: 42px;
  }
}

/* ---------------- Buttons ---------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.9rem;
  font-size: var(--fs-small);
  font-weight: 500;
  border-radius: var(--r-pill);
  transition: transform var(--dur) var(--ease-out), box-shadow var(--dur), background-color var(--dur), border-color var(--dur), color var(--dur);
  will-change: transform;
}

.btn svg {
  width: 16px;
  height: 16px;
  transition: transform var(--dur) var(--ease-out);
}

.btn:hover svg {
  transform: translateX(4px);
}

.btn-primary {
  color: #fcfcfc;
  background: var(--grad-brand);
  background-size: 160% 160%;
  background-position: 0% 50%;
  box-shadow: 0 4px 24px var(--glow);
}

.btn-primary:hover {
  background-position: 100% 50%;
  box-shadow: 0 6px 36px var(--glow);
  transform: translateY(-2px);
}

.btn-ghost {
  color: var(--text);
  border: 1px solid var(--border-strong);
  background: transparent;
}

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

/* ---------------- Glass card ---------------- */
.glass-card {
  position: relative;
  background: var(--glass);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  backdrop-filter: blur(14px) saturate(140%);
  border-radius: var(--r-md);
  padding: 2rem;
  transition: transform var(--dur) var(--ease-out), box-shadow var(--dur);
}

/* 1px gradient border via mask composite */
.glass-card::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: var(--grad-border);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask-composite: exclude;
  opacity: 0.5;
  transition: opacity var(--dur);
  pointer-events: none;
}

.glass-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

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

.card-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  margin-bottom: 1.25rem;
  border-radius: var(--r-sm);
  background: var(--accent-soft);
  color: var(--accent-bright);
}

.card-icon svg {
  width: 26px;
  height: 26px;
}

/* ---------------- Chips ---------------- */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.9rem;
  font-size: var(--fs-tiny);
  font-weight: 500;
  color: var(--text-muted);
  border: 1px solid var(--border);
  border-radius: var(--r-pill);
  background: var(--surface);
  white-space: nowrap;
  transition: border-color var(--dur), color var(--dur);
}

.chip:hover {
  border-color: var(--accent);
  color: var(--text);
}

.chip-dot::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--grad-brand);
}

/* Badge (hero eyebrow pill) */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.45rem 1.1rem;
  font-size: var(--fs-tiny);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-bright);
  border: 1px solid var(--border-strong);
  border-radius: var(--r-pill);
  background: var(--glass);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}

.badge::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 10px var(--accent);
  animation: badge-pulse 2.4s ease-in-out infinite;
}

@keyframes badge-pulse {
  0%,
  100% {
    opacity: 1;
    transform: scale(1);
  }

  50% {
    opacity: 0.55;
    transform: scale(0.8);
  }
}

/* ---------------- Footer ---------------- */
.site-footer {
  position: relative;
  border-top: 1px solid var(--border);
  background: var(--bg-2);
  padding-block: clamp(3rem, 7vw, 5rem) 1.5rem;
  overflow: hidden;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.2fr;
  gap: clamp(2rem, 5vw, 4rem);
  margin-bottom: 3rem;
}

.footer-brand p {
  color: var(--text-muted);
  font-size: var(--fs-small);
  margin-top: 1.1rem;
  max-width: 300px;
}

.footer-col h4 {
  font-size: var(--fs-small);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text);
  margin-bottom: 1.1rem;
}

.footer-col li {
  margin-bottom: 0.6rem;
}

.footer-col a,
.footer-col span {
  font-size: var(--fs-small);
  color: var(--text-muted);
  transition: color var(--dur);
}

.footer-col a:hover {
  color: var(--accent-bright);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}

.footer-bottom p {
  font-size: var(--fs-tiny);
  color: var(--text-muted);
}

.footer-legal {
  opacity: 0.7;
  margin-top: 0.2rem;
}

.footer-social {
  display: flex;
  gap: 0.6rem;
}

.footer-social a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border: 1px solid var(--border-strong);
  border-radius: 50%;
  color: var(--text-muted);
  transition: border-color var(--dur), color var(--dur), transform var(--dur);
}

.footer-social a:hover {
  border-color: var(--accent);
  color: var(--accent-bright);
  transform: translateY(-2px);
}

.footer-social svg {
  width: 15px;
  height: 15px;
}

@media (max-width: 899px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }

  .footer-brand {
    grid-column: 1 / -1;
  }
}

/* ---------------- Forms ---------------- */
.field {
  position: relative;
  margin-bottom: 1.4rem;
}

.field input,
.field select,
.field textarea {
  width: 100%;
  padding: 1rem 1.1rem;
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--r-sm);
  color: var(--text);
  transition: border-color var(--dur), box-shadow var(--dur);
}

.field textarea {
  min-height: 140px;
  resize: vertical;
}

.field input::placeholder,
.field textarea::placeholder {
  color: transparent;
}

.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.field label {
  position: absolute;
  left: 0.85rem;
  top: 1rem;
  padding-inline: 0.3rem;
  font-size: var(--fs-small);
  color: var(--text-muted);
  background: transparent;
  border-radius: 4px;
  pointer-events: none;
  transition: transform var(--dur) var(--ease-out), font-size var(--dur), color var(--dur), background-color var(--dur);
  transform-origin: left top;
}

.field input:focus + label,
.field input:not(:placeholder-shown) + label,
.field textarea:focus + label,
.field textarea:not(:placeholder-shown) + label,
.field select:focus + label,
.field select.has-value + label {
  transform: translateY(-1.65rem) scale(0.82);
  color: var(--accent-bright);
  background: var(--bg);
}

.form-note {
  font-size: var(--fs-tiny);
  color: var(--text-muted);
  margin-top: 0.9rem;
}

.form-success {
  display: none;
  padding: 1.1rem 1.3rem;
  margin-top: 1.2rem;
  border-radius: var(--r-sm);
  border: 1px solid var(--accent);
  background: var(--accent-soft);
  color: var(--text);
  font-size: var(--fs-small);
}

.form-success.show {
  display: block;
  animation: success-in 0.5s var(--ease-out);
}

.form-success a {
  color: var(--accent-bright);
  font-weight: 500;
  text-decoration: underline;
}

/* Error twin of .form-success — same box, warning palette. */
.form-error {
  display: none;
  padding: 1.1rem 1.3rem;
  margin-top: 1.2rem;
  border-radius: var(--r-sm);
  border: 1px solid #e0574f;
  background: rgb(224 87 79 / 12%);
  color: var(--text);
  font-size: var(--fs-small);
}

.form-error.show {
  display: block;
  animation: success-in 0.5s var(--ease-out);
}

.form-error a {
  color: #e0574f;
  font-weight: 500;
  text-decoration: underline;
}

/* Submit button while the POST is in flight. */
.btn.is-sending {
  opacity: 0.65;
  pointer-events: none;
}

@keyframes success-in {
  from {
    opacity: 0;
    transform: translateY(8px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}