/* ==========================================================================
   Elvoros — components.css
   Nav, footer, buttons, cards, steps, CTA band, forms, FAQ.
   ========================================================================== */

/* ---------- Nav ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(0, 0, 0, 0.72);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
  transition: background 220ms var(--ease), border-color 220ms var(--ease), box-shadow 220ms var(--ease);
}

.site-header.is-scrolled {
  background: rgba(0, 0, 0, 0.88);
  box-shadow: 0 12px 32px -20px rgba(0, 0, 0, 0.6);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  height: var(--nav-h);
}

.nav-brand img {
  width: 132px;
  height: auto;
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  background: none;
  border: 1px solid var(--line);
  border-radius: 10px;
  cursor: pointer;
  color: var(--ink);
}

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

.nav-toggle .bar {
  display: block;
  width: 1.25rem;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  transition: transform 0.2s var(--ease), opacity 0.2s var(--ease);
}

.nav-toggle .bar + .bar {
  margin-top: 5px;
}

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

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

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

.nav-menu {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.nav-link {
  position: relative;
  color: var(--ink);
  font-weight: 500;
  padding-block: 0.4rem;
  transition: color 0.25s var(--ease), text-shadow 0.25s var(--ease);
}

.nav-link:hover {
  color: var(--accent-text);
  text-decoration: none;
}

.nav-link.is-active {
  color: var(--accent-text);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  border-radius: 2px;
  background: var(--accent-text);
  opacity: 0;
  transition: opacity 0.25s var(--ease);
}

.nav-link.is-active::after {
  opacity: 1;
}

.nav .btn {
  margin-left: 0.5rem;
}

.nav-item-services {
  position: relative;
}

.nav-sub {
  position: absolute;
  top: calc(100% + 0.5rem);
  left: 50%;
  transform: translateX(-50%);
  min-width: 200px;
  padding: 0.5rem;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.5);
  display: grid;
  gap: 0.15rem;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 160ms var(--ease), visibility 160ms var(--ease);
}

.nav-sub a {
  display: block;
  padding: 0.55rem 0.85rem;
  border-radius: 8px;
  color: var(--ink);
  font-size: 0.9rem;
  font-weight: 500;
}

.nav-sub a:hover {
  background: rgba(157, 140, 255, 0.1);
  color: var(--accent-text);
  text-decoration: none;
}

.nav-item-services:hover .nav-sub,
.nav-item-services:focus-within .nav-sub {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

@media (max-width: 720px) {
  .nav-toggle {
    display: flex;
  }

  .nav-menu {
    position: absolute;
    top: var(--nav-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0.75rem 1.25rem 1.25rem;
    background: rgba(0, 0, 0, 0.96);
    -webkit-backdrop-filter: blur(12px);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 24px 40px -24px rgba(0, 0, 0, 0.6);
    display: none;
  }

  .nav-menu.is-open {
    display: flex;
  }

  .nav-menu li + li {
    border-top: 1px solid var(--line);
  }

  .nav-link {
    display: block;
    padding: 0.95rem 0.25rem;
    font-size: 1.05rem;
  }

  .nav-link.is-active::after {
    display: none;
  }

  .nav-link.is-active {
    color: var(--accent-text);
  }

  .nav .btn {
    margin: 0.9rem 0 0;
    width: 100%;
    justify-content: center;
  }
}

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

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.8rem 1.5rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: box-shadow 0.2s var(--ease), border-color 0.2s var(--ease),
    background-color 0.2s var(--ease);
}

.btn:hover {
  text-decoration: none;
}

.btn-primary {
  position: relative;
  overflow: hidden;
  background: var(--accent);
  color: var(--accent-foreground);
  border: 1px solid var(--accent);
  box-shadow: var(--shadow-1);
}

.btn-primary:hover {
  background: var(--accent-strong);
  border-color: var(--accent-strong);
  box-shadow: var(--shadow-2);
}

.btn-primary.is-sent {
  animation: btn-pulse 520ms var(--ease);
}

@keyframes btn-pulse {
  0% { box-shadow: var(--shadow-1); transform: scale(1); }
  40% { box-shadow: var(--shadow-2); transform: scale(1.02); }
  100% { box-shadow: var(--shadow-1); transform: scale(1); }
}

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

.btn-ghost:hover {
  border-color: var(--accent-text);
  color: var(--accent-text);
  box-shadow: var(--shadow-1);
  transform: translateY(-1px);
}

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

.card {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.6rem 1.5rem;
  transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease), transform 0.2s var(--ease);
}

a.card {
  display: block;
  color: inherit;
}

a.card:hover,
.card:not(.service-card):hover {
  text-decoration: none;
  border-color: var(--border-strong);
  box-shadow: var(--shadow-2);
  transform: translateY(-2px);
}

.card h3 {
  margin-top: 0.7rem;
  font-size: 1.3rem;
}

.card p {
  margin-top: 0.5rem;
  color: var(--ink-dim);
  font-size: 0.98rem;
}

.service-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 0.75rem;
}

.service-card p {
  margin-top: 0;
}

/* ---------- Steps ---------- */

.step {
  border-top: 1px solid var(--line);
  padding-top: 1.25rem;
}

.step h3 {
  margin-top: 0;
  font-size: 1.25rem;
}

.step p {
  margin-top: 0.4rem;
  color: var(--ink-dim);
  font-size: 0.98rem;
}

/* ---------- CTA band ---------- */

.cta-band {
  position: relative;
  text-align: center;
  border-top: 1px solid var(--line);
  background:
    radial-gradient(620px 340px at 50% 50%, rgba(67, 52, 201, 0.16), transparent 70%);
  overflow: hidden;
}

.cta-band h2 {
  max-width: 24ch;
  margin-inline: auto;
}

.cta-band .btn {
  margin-top: 1.75rem;
}

/* ---------- Footer ---------- */

.site-footer {
  position: relative;
  border-top: 1px solid var(--line);
  padding-block: 3.25rem 2.5rem;
  overflow: hidden;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 2.5rem;
}

.footer-brand img {
  width: 120px;
  height: auto;
  margin-bottom: 0.9rem;
}

.footer-brand p {
  color: var(--ink-dim);
  font-size: 0.95rem;
  max-width: 30ch;
}

.footer-col h3 {
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-dim);
  margin-bottom: 1rem;
}

.footer-col li + li {
  margin-top: 0.55rem;
}

.footer-col a {
  color: var(--ink);
  font-size: 0.95rem;
}

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

.footer-meta {
  margin-top: 2.75rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem;
  color: var(--ink-dim);
  font-size: 0.85rem;
}

@media (max-width: 720px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 1.75rem;
  }
}

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

.form-grid {
  display: grid;
  gap: 1.25rem;
}

.form-field {
  display: grid;
  gap: 0.45rem;
}

.form-field label {
  font-weight: 600;
  font-size: 0.95rem;
}

.form-field input,
.form-field textarea,
.form-field select {
  width: 100%;
  padding: 0.8rem 0.95rem;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  color: var(--ink);
}

.form-field input::placeholder,
.form-field textarea::placeholder {
  color: var(--ink-dim);
  opacity: 0.75;
}

.form-field input:focus,
.form-field textarea:focus,
.form-field select:focus {
  border-color: var(--accent-text);
  outline: none;
  box-shadow: 0 0 0 3px rgba(157, 140, 255, 0.2);
}

.form-field input:user-invalid,
.form-field textarea:user-invalid,
.form-field select:user-invalid {
  border-color: var(--danger);
  box-shadow: 0 0 0 3px rgba(248, 113, 113, 0.2);
}

.form-field textarea {
  min-height: 9.5rem;
  resize: vertical;
}

.form-row-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

.form-note {
  margin-top: 1rem;
  font-size: 0.9rem;
  color: var(--ink-dim);
}

.form-note a {
  color: var(--accent-text);
}

@media (max-width: 640px) {
  .form-row-2 {
    grid-template-columns: 1fr;
  }
}

/* ---------- FAQ ---------- */

.faq details {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  padding: 1.1rem 1.25rem;
}

.faq details + details {
  margin-top: 0.85rem;
}

.faq summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--ink);
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.faq summary::-webkit-details-marker {
  display: none;
}

.faq summary::after {
  content: "+";
  font-family: var(--font-mono);
  color: var(--accent-text);
  font-size: 1.1rem;
  transition: transform 0.2s var(--ease);
}

.faq details[open] summary::after {
  transform: rotate(45deg);
}

.faq details[open] summary {
  margin-bottom: 0.6rem;
}

.faq details p {
  color: var(--ink-dim);
  font-size: 0.98rem;
}