/* ============================================================
   BULUTRA — COMPONENTS
   nav · buttons · intro · cursor · panels · forms · footer
   ============================================================ */

/* ---- Intro / preloader ---------------------------------- */
.intro {
  position: fixed;
  inset: 0;
  z-index: var(--z-intro);
  display: grid;
  place-content: center;
  justify-items: center;
  gap: 1.5rem;
  background: var(--bg-900);
  transition: opacity 650ms var(--ease-out), visibility 650ms;
}
.intro.is-done { opacity: 0; visibility: hidden; pointer-events: none; }
.intro__mark { display: flex; align-items: center; gap: 0.9rem; color: var(--blue-500); }
.intro__glyph { filter: drop-shadow(0 0 18px var(--glow-blue)); animation: introFloat 2.2s var(--ease-in-out) infinite; }
.intro__word {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.8rem;
  letter-spacing: -0.02em;
  color: var(--ink-100);
}
@keyframes introFloat { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-5px); } }
.intro__bar { width: 180px; height: 2px; background: var(--line-strong); border-radius: 2px; overflow: hidden; }
.intro__bar-fill {
  display: block; height: 100%; width: 0%;
  background: linear-gradient(90deg, var(--blue-500), var(--cyan-500));
  box-shadow: 0 0 14px var(--glow-cyan);
}
.intro__status {
  font-size: 0.66rem; letter-spacing: 0.3em; color: var(--ink-400);
}
.reduced-motion .intro__glyph { animation: none; }

/* ---- Cursor ambient glow -------------------------------- */
.cursor-glow {
  position: fixed;
  top: 0; left: 0;
  width: 460px; height: 460px;
  margin: -230px 0 0 -230px;
  border-radius: 50%;
  z-index: var(--z-cursor);
  pointer-events: none;
  background: radial-gradient(circle, rgba(58, 99, 255, 0.10), transparent 62%);
  opacity: 0;
  transition: opacity 600ms var(--ease-out);
  transform: translate3d(var(--cx, 50vw), var(--cy, 50vh), 0);
  mix-blend-mode: screen;
}
.has-pointer .cursor-glow { opacity: 1; }
.reduced-motion .cursor-glow { display: none; }

/* ---- Header / Nav --------------------------------------- */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: var(--z-header);
  padding-top: clamp(0.75rem, 1.4vw, 1.25rem);
  transition: transform 400ms var(--ease-out);
}
.nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  height: 60px;
  padding-inline: clamp(1rem, 2.4vw, 1.5rem);
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  background: rgba(10, 14, 22, 0.55);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  box-shadow: 0 1px 0 rgba(255,255,255,0.04) inset, 0 18px 50px -30px rgba(0,0,0,0.9);
  transition: background var(--dur-mid) var(--ease-out), border-color var(--dur-mid);
}
.site-header.is-scrolled .nav {
  background: rgba(8, 11, 18, 0.82);
  border-color: var(--line-strong);
}
.site-header.is-hidden { transform: translateY(calc(-100% - 24px)); }

.nav__logo { display: flex; align-items: center; flex-shrink: 0; }
.nav__logo img { height: 30px; width: auto; }

.nav__center {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  margin-right: auto;
  margin-left: clamp(0.75rem, 2.5vw, 2rem);
}
.nav__link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.5rem 0.85rem;
  border-radius: var(--radius-pill);
  font-size: 0.92rem;
  color: var(--ink-300);
  transition: color var(--dur-fast) var(--ease-out), background var(--dur-fast);
}
.nav__link:hover { color: var(--ink-100); background: rgba(255,255,255,0.04); }
.nav__chev { transition: transform var(--dur-mid) var(--ease-out); opacity: 0.7; }

.nav__item--has-menu { position: relative; }
.nav__item--has-menu:hover .nav__chev,
.nav__trigger[aria-expanded="true"] .nav__chev { transform: rotate(180deg); }

/* mega menu */
.mega {
  position: absolute;
  top: calc(100% + 14px);
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  width: 320px;
  padding: 0.5rem;
  display: grid;
  gap: 2px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: rgba(12, 16, 26, 0.92);
  backdrop-filter: blur(22px);
  -webkit-backdrop-filter: blur(22px);
  box-shadow: 0 30px 70px -30px rgba(0,0,0,0.85);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--dur-mid) var(--ease-out), transform var(--dur-mid) var(--ease-out), visibility var(--dur-mid);
}
.nav__item--has-menu:hover .mega,
.nav__item--has-menu:focus-within .mega,
.mega.is-open {
  opacity: 1; visibility: visible; transform: translateX(-50%) translateY(0);
}
.mega__item {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.7rem 0.8rem;
  border-radius: var(--radius-sm);
  transition: background var(--dur-fast) var(--ease-out);
}
.mega__item:hover { background: rgba(255,255,255,0.05); }
.mega__dot { width: 9px; height: 9px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 12px var(--accent); flex-shrink: 0; }
.mega__text { display: flex; flex-direction: column; line-height: 1.3; }
.mega__text strong { font-family: var(--font-display); color: var(--ink-100); font-size: 0.95rem; }
.mega__text em { font-style: normal; font-size: 0.8rem; color: var(--ink-400); }

.nav__right { display: flex; align-items: center; gap: 0.7rem; flex-shrink: 0; }

/* language toggle */
.lang-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.15rem;
  padding: 0.2rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
}
.lang-toggle__btn {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--ink-400);
  padding: 0.28rem 0.55rem;
  border-radius: var(--radius-pill);
  transition: color var(--dur-fast), background var(--dur-fast);
}
.lang-toggle__btn.is-active { color: var(--ink-100); background: rgba(58, 99, 255, 0.18); }
.lang-toggle__btn:hover { color: var(--ink-100); }
.lang-toggle__sep { width: 1px; height: 12px; background: var(--line-strong); }
.lang-toggle--lg .lang-toggle__btn { font-size: 0.85rem; padding: 0.45rem 0.8rem; }

.nav__burger {
  display: none;
  width: 42px; height: 42px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--line);
  position: relative;
}
.nav__burger span {
  position: absolute;
  left: 12px; right: 12px; height: 1.5px;
  background: var(--ink-100);
  transition: transform var(--dur-mid) var(--ease-out), opacity var(--dur-fast);
}
.nav__burger span:nth-child(1) { top: 17px; }
.nav__burger span:nth-child(2) { bottom: 17px; }
.is-menu-open .nav__burger span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.is-menu-open .nav__burger span:nth-child(2) { transform: translateY(-6px) rotate(-45deg); }

/* ---- Mobile menu overlay -------------------------------- */
.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: var(--z-menu);
  background: rgba(6, 8, 12, 0.96);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--dur-mid) var(--ease-out), visibility var(--dur-mid);
}
.is-menu-open .mobile-menu { opacity: 1; visibility: visible; }
.mobile-menu__inner {
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 0.4rem;
  padding: 6rem var(--container-pad) 2.5rem;
}
.mobile-menu__link {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  font-family: var(--font-display);
  font-size: 1.7rem;
  font-weight: 600;
  color: var(--ink-100);
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--line);
  opacity: 0;
  transform: translateY(14px);
}
.is-menu-open .mobile-menu__link { animation: mmIn 500ms var(--ease-out) forwards; }
.mobile-menu__link:nth-child(1) { animation-delay: 80ms; }
.mobile-menu__link:nth-child(2) { animation-delay: 130ms; }
.mobile-menu__link:nth-child(3) { animation-delay: 180ms; }
.mobile-menu__link:nth-child(4) { animation-delay: 230ms; }
.mobile-menu__link:nth-child(5) { animation-delay: 280ms; }
@keyframes mmIn { to { opacity: 1; transform: none; } }
.mm-dot { width: 11px; height: 11px; border-radius: 50%; background: var(--accent, var(--blue-500)); box-shadow: 0 0 14px var(--accent, var(--blue-500)); }
.mobile-menu__foot { margin-top: 2rem; display: flex; flex-direction: column; gap: 1.2rem; }
.reduced-motion .mobile-menu__link { animation: none; opacity: 1; transform: none; }

/* ---- Buttons -------------------------------------------- */
.btn {
  --btn-pad-y: 0.7rem;
  --btn-pad-x: 1.2rem;
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: var(--btn-pad-y) var(--btn-pad-x);
  border-radius: var(--radius-pill);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.01em;
  line-height: 1;
  cursor: pointer;
  white-space: nowrap;
  transition: transform var(--dur-fast) var(--ease-out), background var(--dur-mid), box-shadow var(--dur-mid), color var(--dur-mid), border-color var(--dur-mid);
}
.btn svg { transition: transform var(--dur-mid) var(--ease-out); }
.btn--lg { --btn-pad-y: 0.95rem; --btn-pad-x: 1.6rem; font-size: 1rem; }
.btn--block { width: 100%; }

.btn--primary {
  color: #fff;
  background: linear-gradient(180deg, var(--blue-500), var(--blue-700));
  box-shadow: 0 0 0 1px rgba(120, 150, 255, 0.4) inset, 0 10px 30px -10px var(--glow-blue);
}
.btn--primary:hover { box-shadow: 0 0 0 1px rgba(150, 175, 255, 0.6) inset, 0 14px 38px -8px var(--glow-blue); }
.btn--primary:hover svg { transform: translateX(3px); }
.btn--primary:active { transform: translateY(1px); }

.btn--ghost {
  color: var(--ink-100);
  border: 1px solid var(--line-strong);
  background: rgba(255, 255, 255, 0.02);
}
.btn--ghost:hover { background: rgba(255, 255, 255, 0.06); border-color: var(--line-blue); }

/* signal-pulse sweep across the primary CTA on hover */
.btn--pulse { overflow: hidden; }
.btn--pulse > * { position: relative; z-index: 1; }
.btn--pulse::before {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(105deg, transparent 30%, rgba(190, 215, 255, 0.55) 50%, transparent 70%);
  transform: translateX(-120%);
  opacity: 0;
  z-index: 0;
}
.btn--pulse:hover::before { animation: btnSweep 0.9s var(--ease-out); }
@keyframes btnSweep {
  0% { transform: translateX(-120%); opacity: 0; }
  18% { opacity: 0.9; }
  100% { transform: translateX(120%); opacity: 0; }
}
.reduced-motion .btn--pulse:hover::before { animation: none; }

.nav__cta { --btn-pad-y: 0.55rem; --btn-pad-x: 1.05rem; font-size: 0.9rem; }

/* ---- Instrument panel (shared by feature visuals) ------- */
.panel {
  position: relative;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(180deg, rgba(20, 26, 42, 0.6), rgba(8, 11, 18, 0.75));
  overflow: hidden;
  box-shadow: 0 40px 90px -50px rgba(0,0,0,0.9), 0 0 0 1px rgba(255,255,255,0.02) inset;
}
.panel::before {
  /* hairline engineered grid inside the panel */
  content: "";
  position: absolute; inset: 0;
  background-image:
    linear-gradient(to right, rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 28px 28px;
  pointer-events: none;
}
.panel::after {
  /* top sheen */
  content: "";
  position: absolute; inset: 0 0 auto 0; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.25), transparent);
}
.panel__bar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 0.85rem 1.1rem;
  border-bottom: 1px solid var(--line);
  position: relative; z-index: 1;
}
.panel__title { font-size: 0.7rem; letter-spacing: 0.18em; color: var(--ink-300); }
.panel__led {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--cyan-500);
  box-shadow: 0 0 10px var(--cyan-500);
  animation: led 3s var(--ease-in-out) infinite;
}
.panel__led[data-state="warn"] { background: var(--amber-500); box-shadow: 0 0 10px var(--amber-500); }
@keyframes led { 0%,100% { opacity: 1; } 50% { opacity: 0.35; } }
.reduced-motion .panel__led { animation: none; }
.panel__body { position: relative; z-index: 1; padding: 0.5rem; aspect-ratio: 36 / 30; }
.panel__body svg { width: 100%; height: 100%; }

.panel__metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--line);
  position: relative; z-index: 1;
}
.metric {
  padding: 0.9rem 1rem;
  display: flex; flex-direction: column; gap: 0.3rem;
  border-right: 1px solid var(--line);
}
.metric:last-child { border-right: none; }
.metric__value {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.15rem, 2.2vw, 1.5rem);
  color: var(--ink-100);
  font-variant-numeric: tabular-nums;
}
.metric__value--warn { color: var(--amber-500); }
.metric__label { font-size: 0.6rem; letter-spacing: 0.14em; color: var(--ink-400); }

/* readout chips (hero + reuse) */
.readout {
  display: inline-flex; align-items: center; gap: 0.55rem;
  padding: 0.5rem 0.85rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  background: rgba(10, 14, 22, 0.5);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}
.readout__k { font-size: 0.62rem; letter-spacing: 0.16em; color: var(--ink-400); }
.readout__v { font-size: 0.72rem; letter-spacing: 0.08em; color: var(--ink-100); }
.readout__led { width: 7px; height: 7px; border-radius: 50%; background: var(--cyan-500); box-shadow: 0 0 9px var(--cyan-500); animation: led 3s var(--ease-in-out) infinite; }

/* ---- Contact form --------------------------------------- */
.contact-form { position: relative; }
.contact-form__panel {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.1rem;
  padding: clamp(1.4rem, 3vw, 2.2rem);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(20, 26, 42, 0.55), rgba(8, 11, 18, 0.7));
  box-shadow: 0 40px 90px -50px rgba(0,0,0,0.9);
  transition: opacity var(--dur-mid) var(--ease-out), transform var(--dur-mid);
}
.field { display: flex; flex-direction: column; gap: 0.45rem; }
.field--full { grid-column: 1 / -1; }
.field label { font-size: 0.82rem; color: var(--ink-300); font-weight: 500; }
.field__opt { color: var(--ink-400); font-weight: 400; }
.field input, .field textarea, .select-wrap select {
  width: 100%;
  padding: 0.8rem 0.9rem;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  background: rgba(6, 8, 12, 0.6);
  color: var(--ink-100);
  font-size: 0.95rem;
  transition: border-color var(--dur-fast) var(--ease-out), box-shadow var(--dur-fast), background var(--dur-fast);
}
.field input::placeholder, .field textarea::placeholder { color: var(--ink-400); }
.field input:focus, .field textarea:focus, .select-wrap select:focus {
  outline: none;
  border-color: var(--blue-500);
  box-shadow: 0 0 0 3px rgba(58, 99, 255, 0.18);
  background: rgba(6, 8, 12, 0.85);
}
.field textarea { resize: vertical; min-height: 70px; }
.field.is-invalid input, .field.is-invalid textarea {
  border-color: rgba(255, 120, 120, 0.7);
  box-shadow: 0 0 0 3px rgba(255, 90, 90, 0.14);
}
.field__error { font-size: 0.72rem; color: #ff9b9b; min-height: 0; }

/* honeypot — off-screen for humans, tempting for bots */
.hp-field { position: absolute !important; left: -9999px !important; width: 1px; height: 1px; overflow: hidden; }
/* form-level (network / server) error */
.contact-form__err { grid-column: 1 / -1; margin: 0; text-align: center; font-size: 0.78rem; color: #ff9b9b; }
.contact-form__err[hidden] { display: none; }
.contact-form.is-sending .btn[type="submit"] { opacity: 0.65; pointer-events: none; }

.select-wrap { position: relative; }
.select-wrap select { appearance: none; -webkit-appearance: none; cursor: pointer; }
.select-wrap svg { position: absolute; right: 0.9rem; top: 50%; transform: translateY(-50%); color: var(--ink-300); pointer-events: none; }

.contact-form__panel .btn { grid-column: 1 / -1; margin-top: 0.3rem; }
.contact-form__note {
  grid-column: 1 / -1;
  text-align: center;
  font-size: 0.6rem; letter-spacing: 0.18em; color: var(--ink-400);
}

.contact-form.is-sent .contact-form__panel { opacity: 0; transform: scale(0.98); pointer-events: none; position: absolute; inset: 0; }
.contact-form__success[hidden] { display: none; }
.contact-form__success {
  display: flex; flex-direction: column; align-items: center; text-align: center;
  gap: 0.8rem;
  padding: clamp(2.5rem, 6vw, 4rem) 2rem;
  border: 1px solid var(--line-blue);
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(20, 30, 55, 0.6), rgba(8, 11, 18, 0.7));
  animation: successIn 600ms var(--ease-out);
}
@keyframes successIn { from { opacity: 0; transform: translateY(16px); } to { opacity: 1; transform: none; } }
.success-mark {
  width: 64px; height: 64px; border-radius: 50%;
  display: grid; place-content: center;
  color: var(--cyan-400);
  background: rgba(56, 232, 255, 0.1);
  box-shadow: 0 0 0 1px var(--line-blue), 0 0 40px -8px var(--glow-cyan);
}
.contact-form__success h3 { font-size: var(--fs-h3); }
.contact-form__success p { color: var(--ink-300); max-width: 32ch; }

/* ---- Footer --------------------------------------------- */
.site-footer {
  position: relative;
  z-index: var(--z-content);
  margin-top: var(--space-9);
  padding-top: var(--space-8);
  border-top: 1px solid var(--line);
}
.site-footer__grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 2.5rem;
  padding-bottom: var(--space-8);
}
.site-footer__brand img { margin-bottom: 1rem; }
.site-footer__brand p { color: var(--ink-400); max-width: 30ch; font-size: 0.92rem; }
.site-footer__col { display: flex; flex-direction: column; gap: 0.65rem; }
.site-footer__col h5 {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-400);
  margin-bottom: 0.3rem;
}
.site-footer__col a { color: var(--ink-300); font-size: 0.92rem; transition: color var(--dur-fast); width: fit-content; }
.site-footer__col a:hover { color: var(--ink-100); }
.site-footer__base {
  display: flex; align-items: center; justify-content: space-between;
  padding-block: 1.5rem;
  border-top: 1px solid var(--line);
  font-size: 0.66rem; letter-spacing: 0.14em; color: var(--ink-400);
}
.site-footer__loc { color: var(--ink-400); }
.site-footer__base { flex-wrap: wrap; gap: 0.7rem 1.2rem; }
.site-footer__legal { display: flex; flex-wrap: wrap; gap: 0.4rem 1.15rem; }
.site-footer__legal a { color: var(--ink-400); transition: color var(--dur-fast); }
.site-footer__legal a:hover { color: var(--ink-100); }