/* ==========================================================================
   NEXANDR — base layer, motion primitives and small component classes.
   Tailwind utilities handle layout; this file holds what utilities can't.
   ========================================================================== */

:root {
  --nx-ink: #080B09;
  --nx-forest: #0B2E22;
  --nx-emerald: #0F7A56;
  --nx-lime: #C4F04A;
  --nx-cream: #F5F2E9;
  --nx-line: #E1DBCB;
  --nx-header: 76px;
}

html { scroll-behavior: smooth; scroll-padding-top: calc(var(--nx-header) + 24px); }

body {
  background-color: var(--nx-cream);
  color: var(--nx-ink);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

::selection { background: var(--nx-lime); color: var(--nx-ink); }

:focus-visible {
  outline: 2px solid var(--nx-emerald);
  outline-offset: 3px;
  border-radius: 4px;
}

/* --- Typography ---------------------------------------------------------- */

.display {
  font-family: 'Inter Tight', Inter, system-ui, sans-serif;
  font-weight: 500;
  letter-spacing: -0.035em;
  line-height: 0.98;
}
.eyebrow {
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}
.measure { max-width: 62ch; }

/* --- Surfaces ------------------------------------------------------------ */

.rule { border-top: 1px solid var(--nx-line); }
.rule-dark { border-top: 1px solid rgba(245, 242, 233, 0.12); }

.grid-field {
  background-image:
    linear-gradient(to right, rgba(11, 46, 34, 0.055) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(11, 46, 34, 0.055) 1px, transparent 1px);
  background-size: 72px 72px;
}
.grid-field-dark {
  background-image:
    linear-gradient(to right, rgba(196, 240, 74, 0.07) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(196, 240, 74, 0.07) 1px, transparent 1px);
  background-size: 72px 72px;
}
.mask-fade-b { -webkit-mask-image: linear-gradient(to bottom, #000 45%, transparent); mask-image: linear-gradient(to bottom, #000 45%, transparent); }
.mask-fade-x { -webkit-mask-image: linear-gradient(to right, transparent, #000 8%, #000 92%, transparent); mask-image: linear-gradient(to right, transparent, #000 8%, #000 92%, transparent); }

/* --- Buttons ------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  border-radius: 8px;
  padding: 0.8rem 1.35rem;
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  line-height: 1;
  border: 1px solid transparent;
  transition: transform 220ms cubic-bezier(0.16, 1, 0.3, 1),
              background-color 220ms ease, color 220ms ease,
              border-color 220ms ease, box-shadow 220ms ease;
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }
.btn .btn-ico { transition: transform 260ms cubic-bezier(0.16, 1, 0.3, 1); }
.btn:hover .btn-ico { transform: translateX(3px); }

.btn-primary { background: var(--nx-emerald); color: #fff; box-shadow: 0 10px 24px -14px rgba(15, 122, 86, 0.9); }
.btn-primary:hover { background: #0C6446; box-shadow: 0 14px 30px -14px rgba(15, 122, 86, 0.95); }

.btn-dark { background: var(--nx-ink); color: var(--nx-cream); }
.btn-dark:hover { background: var(--nx-forest); }

.btn-ghost { background: transparent; color: var(--nx-ink); border-color: var(--nx-line); }
.btn-ghost:hover { border-color: rgba(11, 46, 34, 0.4); background: rgba(11, 46, 34, 0.035); }

.btn-onDark { background: rgba(245, 242, 233, 0.06); color: var(--nx-cream); border-color: rgba(245, 242, 233, 0.18); }
.btn-onDark:hover { background: rgba(245, 242, 233, 0.12); border-color: rgba(245, 242, 233, 0.34); }

.btn-lime { background: var(--nx-lime); color: #0B2E22; }
.btn-lime:hover { background: #D3F86B; }

.btn-sm { padding: 0.6rem 1rem; font-size: 0.82rem; }

/* --- Link with underline sweep ------------------------------------------- */

.link-arrow {
  display: inline-flex; align-items: center; gap: 0.4rem;
  font-size: 0.875rem; font-weight: 500;
  color: var(--nx-emerald);
}
.link-arrow svg { transition: transform 260ms cubic-bezier(0.16, 1, 0.3, 1); }
.link-arrow:hover svg { transform: translateX(4px); }

/* --- Cards --------------------------------------------------------------- */

.card {
  position: relative;
  background: #FBFAF5;
  border: 1px solid var(--nx-line);
  border-radius: 14px;
  transition: transform 320ms cubic-bezier(0.16, 1, 0.3, 1),
              box-shadow 320ms ease, border-color 320ms ease;
}
.card-hover:hover {
  transform: translateY(-4px);
  border-color: rgba(15, 122, 86, 0.35);
  box-shadow: 0 2px 4px rgba(8, 11, 9, 0.04), 0 26px 50px -30px rgba(11, 46, 34, 0.45);
}
.card-dark {
  background: rgba(245, 242, 233, 0.035);
  border-color: rgba(245, 242, 233, 0.12);
}
.card-dark.card-hover:hover {
  border-color: rgba(196, 240, 74, 0.4);
  background: rgba(245, 242, 233, 0.06);
  box-shadow: 0 26px 60px -34px rgba(0, 0, 0, 0.8);
}

/* Thin accent bar that grows on hover */
.card-accent::after {
  content: '';
  position: absolute; left: -1px; top: 18px; bottom: 18px;
  width: 2px; border-radius: 2px;
  background: linear-gradient(to bottom, var(--nx-lime), var(--nx-emerald));
  transform: scaleY(0); transform-origin: top;
  transition: transform 420ms cubic-bezier(0.16, 1, 0.3, 1);
}
.card-accent:hover::after { transform: scaleY(1); }

/* --- Navigation ---------------------------------------------------------- */

.nav-link {
  position: relative;
  font-size: 0.875rem;
  font-weight: 450;
  color: rgba(8, 11, 9, 0.66);
  transition: color 200ms ease;
}
.nav-link::after {
  content: ''; position: absolute; left: 0; right: 0; bottom: -6px; height: 1.5px;
  background: var(--nx-emerald);
  transform: scaleX(0); transform-origin: left;
  transition: transform 300ms cubic-bezier(0.16, 1, 0.3, 1);
}
.nav-link:hover { color: var(--nx-ink); }
.nav-link:hover::after, .nav-link[aria-current="page"]::after { transform: scaleX(1); }
.nav-link[aria-current="page"] { color: var(--nx-ink); }

.nav-shell {
  transition: background-color 300ms ease, border-color 300ms ease, backdrop-filter 300ms ease;
  border-bottom: 1px solid transparent;
}
.nav-shell.is-stuck {
  background: rgba(251, 250, 245, 0.82);
  backdrop-filter: saturate(150%) blur(14px);
  -webkit-backdrop-filter: saturate(150%) blur(14px);
  border-bottom-color: var(--nx-line);
}

#nav-panel { transition: opacity 300ms ease, visibility 300ms ease; }
#nav-panel[hidden] { display: block !important; opacity: 0; visibility: hidden; pointer-events: none; }

/* --- Scroll reveal ------------------------------------------------------- */

.reveal { opacity: 0; transform: translateY(18px); }
.reveal.is-in {
  opacity: 1; transform: none;
  transition: opacity 760ms cubic-bezier(0.16, 1, 0.3, 1) var(--d, 0ms),
              transform 760ms cubic-bezier(0.16, 1, 0.3, 1) var(--d, 0ms);
}

/* --- Hero visual --------------------------------------------------------- */

.beam { stroke-dasharray: 60 460; animation: beamrun 7s linear infinite; }
@keyframes beamrun { to { stroke-dashoffset: -520; } }
.node-pulse { transform-box: fill-box; transform-origin: center; animation: nodepulse 4.5s ease-in-out infinite; }
@keyframes nodepulse { 0%,100% { opacity: .35; r: 3; } 50% { opacity: 1; r: 4.5; } }

/* --- Forms --------------------------------------------------------------- */

.field {
  width: 100%;
  background: #FBFAF5;
  border: 1px solid var(--nx-line);
  border-radius: 8px;
  padding: 0.8rem 0.9rem;
  font-size: 0.925rem;
  color: var(--nx-ink);
  transition: border-color 200ms ease, box-shadow 200ms ease, background-color 200ms ease;
}
.field::placeholder { color: rgba(8, 11, 9, 0.34); }
.field:focus {
  outline: none; background: #fff;
  border-color: var(--nx-emerald);
  box-shadow: 0 0 0 3px rgba(15, 122, 86, 0.12);
}
.label { display: block; font-size: 0.78rem; font-weight: 500; letter-spacing: 0.01em; color: rgba(8, 11, 9, 0.6); margin-bottom: 0.4rem; }

/* --- Utilities ----------------------------------------------------------- */

.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 100;
  background: var(--nx-ink); color: var(--nx-cream);
  padding: 0.75rem 1.1rem; border-radius: 0 0 8px 0; font-size: 0.85rem;
}
.skip-link:focus { left: 0; }

.chip {
  display: inline-flex; align-items: center; gap: 0.4rem;
  border: 1px solid var(--nx-line); border-radius: 999px;
  padding: 0.3rem 0.7rem; font-size: 0.75rem; color: rgba(8, 11, 9, 0.66);
  background: rgba(251, 250, 245, 0.7);
}
.chip-dark { border-color: rgba(245, 242, 233, 0.16); color: rgba(245, 242, 233, 0.7); background: rgba(245, 242, 233, 0.04); }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}

/* ==========================================================================
   Chat assistant widget
   ========================================================================== */

.nx-chat-launcher {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 60;
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  border-radius: 999px;
  border: 1px solid rgba(245, 242, 233, 0.14);
  background: var(--nx-forest);
  color: var(--nx-cream);
  padding: 0.8rem 1.15rem;
  font-size: 0.875rem;
  font-weight: 500;
  box-shadow: 0 10px 30px -12px rgba(11, 46, 34, 0.6);
  transition: transform 240ms cubic-bezier(0.16, 1, 0.3, 1), background-color 240ms ease;
}
.nx-chat-launcher:hover { background: #0F3A2B; transform: translateY(-2px); }
.nx-chat-launcher[hidden] { display: none !important; }
.nx-chat-launcher .dot {
  width: 7px; height: 7px; border-radius: 999px; background: var(--nx-lime);
}

.nx-chat-panel {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 61;
  display: flex;
  flex-direction: column;
  width: min(390px, calc(100vw - 40px));
  height: min(580px, calc(100dvh - 40px));
  background: var(--nx-cream);
  border: 1px solid var(--nx-line);
  border-radius: 16px;
  box-shadow: 0 4px 10px rgba(8, 11, 9, 0.06), 0 40px 80px -32px rgba(11, 46, 34, 0.5);
  overflow: hidden;
  transform-origin: bottom right;
  animation: nx-chat-in 300ms cubic-bezier(0.16, 1, 0.3, 1);
}
@keyframes nx-chat-in {
  from { opacity: 0; transform: translateY(12px) scale(0.97); }
  to   { opacity: 1; transform: none; }
}
.nx-chat-panel[hidden] { display: none !important; }

.nx-chat-head {
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  padding: 0.9rem 1rem 0.9rem 1.15rem;
  background: var(--nx-forest-deep, #06180F);
  color: var(--nx-cream);
}
.nx-chat-head h2 { font-family: 'Inter Tight', Inter, sans-serif; font-size: 0.98rem; font-weight: 500; letter-spacing: -0.01em; }
.nx-chat-head p { font-size: 0.72rem; color: rgba(245, 242, 233, 0.5); margin-top: 1px; }
.nx-chat-close {
  display: inline-flex; align-items: center; justify-content: center;
  height: 30px; width: 30px; border-radius: 8px;
  color: rgba(245, 242, 233, 0.6);
  transition: background-color 200ms ease, color 200ms ease;
}
.nx-chat-close:hover { background: rgba(245, 242, 233, 0.1); color: var(--nx-cream); }

.nx-chat-log {
  flex: 1; overflow-y: auto; padding: 1.15rem;
  display: flex; flex-direction: column; gap: 0.9rem;
  scroll-behavior: smooth;
}
.nx-msg { max-width: 88%; font-size: 0.875rem; line-height: 1.6; }
.nx-msg p + p { margin-top: 0.6rem; }
.nx-msg ul { margin-top: 0.5rem; padding-left: 1.05rem; list-style: disc; }
.nx-msg li + li { margin-top: 0.25rem; }
.nx-msg code {
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 0.82em; background: rgba(11, 46, 34, 0.07);
  padding: 0.1em 0.35em; border-radius: 4px;
}
.nx-msg-user {
  align-self: flex-end;
  background: var(--nx-forest);
  color: var(--nx-cream);
  border-radius: 12px 12px 4px 12px;
  padding: 0.65rem 0.85rem;
}
.nx-msg-bot {
  align-self: flex-start;
  color: rgba(8, 11, 9, 0.82);
  background: #FBFAF5;
  border: 1px solid var(--nx-line);
  border-radius: 12px 12px 12px 4px;
  padding: 0.7rem 0.9rem;
}
.nx-msg-error { border-color: rgba(180, 60, 40, 0.35); color: #8C3A24; background: rgba(180, 60, 40, 0.05); }

.nx-typing { display: inline-flex; gap: 4px; padding: 2px 0; }
.nx-typing span {
  width: 5px; height: 5px; border-radius: 999px; background: rgba(8, 11, 9, 0.28);
  animation: nx-blink 1.3s ease-in-out infinite;
}
.nx-typing span:nth-child(2) { animation-delay: 0.18s; }
.nx-typing span:nth-child(3) { animation-delay: 0.36s; }
@keyframes nx-blink { 0%, 60%, 100% { opacity: 0.25; } 30% { opacity: 1; } }

.nx-chat-suggestions { display: flex; flex-wrap: wrap; gap: 0.4rem; padding: 0 1.15rem 0.9rem; }
.nx-suggestion {
  border: 1px solid var(--nx-line); background: #FBFAF5;
  border-radius: 999px; padding: 0.35rem 0.7rem;
  font-size: 0.76rem; color: rgba(8, 11, 9, 0.6);
  transition: border-color 200ms ease, color 200ms ease;
}
.nx-suggestion:hover { border-color: var(--nx-emerald); color: var(--nx-emerald); }

.nx-chat-form {
  display: flex; align-items: flex-end; gap: 0.5rem;
  border-top: 1px solid var(--nx-line);
  background: #FBFAF5; padding: 0.75rem;
}
.nx-chat-input {
  flex: 1; resize: none; max-height: 120px;
  border: 1px solid var(--nx-line); border-radius: 10px;
  background: var(--nx-cream); padding: 0.6rem 0.7rem;
  font-size: 0.875rem; line-height: 1.45; color: var(--nx-ink);
  transition: border-color 200ms ease, box-shadow 200ms ease;
}
.nx-chat-input::placeholder { color: rgba(8, 11, 9, 0.35); }
.nx-chat-input:focus {
  outline: none; border-color: var(--nx-emerald);
  box-shadow: 0 0 0 3px rgba(15, 122, 86, 0.1);
}
.nx-chat-send {
  display: inline-flex; align-items: center; justify-content: center;
  height: 38px; width: 38px; flex: none;
  border-radius: 10px; background: var(--nx-emerald); color: #fff;
  transition: background-color 200ms ease, opacity 200ms ease;
}
.nx-chat-send:hover { background: #0C6446; }
.nx-chat-send:disabled { opacity: 0.4; cursor: not-allowed; }

.nx-chat-foot {
  padding: 0 0.75rem 0.7rem; background: #FBFAF5;
  font-size: 0.68rem; color: rgba(8, 11, 9, 0.35); text-align: center;
}

@media (max-width: 480px) {
  .nx-chat-panel { right: 10px; left: 10px; bottom: 10px; width: auto; height: min(560px, calc(100dvh - 20px)); }
  .nx-chat-launcher { right: 14px; bottom: 14px; }
}