/* =====================================================
   Skyline Drones v2 — Shared Components
   Nav, buttons, cards, footer, contact form
   ===================================================== */

/* =====================================================
   Top nav
   ===================================================== */
.nav {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: var(--z-nav);
  padding: var(--space-5) var(--page-pad);
  background: linear-gradient(180deg, rgba(5, 5, 7, 0.85) 0%, rgba(5, 5, 7, 0.0) 100%);
  transition: background var(--t-mid) var(--ease-out), backdrop-filter var(--t-mid) var(--ease-out), border-color var(--t-mid) var(--ease-out);
  border-bottom: 1px solid transparent;
}
.nav.is-scrolled {
  background: rgba(5, 5, 7, 0.78);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  border-bottom-color: var(--border-faint);
}
.nav-inner {
  max-width: var(--container);
  margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--space-8);
}
.nav-brand {
  display: flex; align-items: center; gap: var(--space-3);
  text-decoration: none;
}
.nav-brand img { height: 38px; width: auto; }
.nav-brand-text {
  display: flex; flex-direction: column; gap: 2px;
}
.nav-brand-name {
  font-family: var(--font-display);
  font-size: 14px; letter-spacing: 0.04em; text-transform: uppercase;
  color: var(--ink-100);
}
.nav-brand-tag {
  font-family: var(--font-display);
  font-size: 9px; letter-spacing: 0.32em; text-transform: uppercase;
  color: var(--gold-400);
}
.nav-links {
  display: flex; align-items: center; gap: var(--space-6);
}
.nav-link {
  font-family: var(--font-display);
  font-size: 12px; letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--ink-200);
  position: relative;
  padding: 6px 0;
  white-space: nowrap;
  transition: color var(--t-fast) var(--ease-out);
}
.nav-link::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 0;
  height: 1px; background: currentColor; transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--t-fast) var(--ease-out);
}
.nav-link:hover { color: var(--gold-400); }
.nav-link:hover::after { transform: scaleX(1); }
.nav-link.is-about      { color: var(--gold-400); }
.nav-link.is-cleaning   { color: var(--gold-400); }
.nav-link.is-firefight  { color: var(--ember-300); }
.nav-link.is-photo      { color: var(--azure-400); }
.nav-link.is-landscape  { color: var(--land-400); }
.nav-link.is-aqua       { color: var(--aqua-400); }
.nav-link.is-active     { color: var(--ink-100); }
.nav-link.is-active::after { transform: scaleX(1); background: var(--gold-400); }

.nav-cta {
  display: inline-flex; align-items: center; gap: var(--space-2);
  font-family: var(--font-display);
  font-size: 12px; letter-spacing: 0.22em; text-transform: uppercase;
  background: var(--gold-400); color: var(--ink-900);
  padding: 14px 22px;
  border-radius: var(--r-pill);
  white-space: nowrap;
  transition: box-shadow var(--t-mid) var(--ease-out), background var(--t-mid) var(--ease-out);
}
.nav-cta:hover { box-shadow: 0 12px 32px -10px var(--gold-glow); background: var(--gold-300, var(--gold-400)); }

.nav-toggle {
  display: none;
  width: 44px; height: 44px;
  position: relative;
  border-radius: var(--r-pill);
  border: 1px solid var(--border-soft);
}
.nav-toggle span {
  position: absolute; left: 14px; right: 14px; height: 1px;
  background: var(--ink-100);
  transition: transform var(--t-fast) var(--ease-out), opacity var(--t-fast) var(--ease-out), top var(--t-fast) var(--ease-out);
}
.nav-toggle span:nth-child(1) { top: 17px; }
.nav-toggle span:nth-child(2) { top: 26px; }
.nav.is-open .nav-toggle span:nth-child(1) { top: 21px; transform: rotate(45deg); }
.nav.is-open .nav-toggle span:nth-child(2) { top: 21px; transform: rotate(-45deg); }

@media (max-width: 1024px) {
  .nav-links { display: none; }
  .nav-toggle { display: block; }
  .nav.is-open {
    background: var(--ink-900);
    backdrop-filter: none;
    border-bottom-color: var(--border-soft);
  }
  .nav.is-open .nav-links {
    display: flex;
    position: fixed; top: 78px; left: 0; right: 0; bottom: 0;
    background: var(--ink-900);
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-12) var(--page-pad);
    gap: var(--space-6);
  }
  .nav.is-open .nav-link { font-size: 20px; }
  .nav.is-open .nav-cta { font-size: 14px; }
}

/* =====================================================
   Buttons
   ===================================================== */
.btn {
  display: inline-flex; align-items: center; gap: var(--space-3);
  font-family: var(--font-display);
  font-size: 12px; letter-spacing: 0.22em; text-transform: uppercase;
  padding: 16px 28px;
  border-radius: var(--r-pill);
  border: 1px solid transparent;
  transition: transform var(--t-fast) var(--ease-out), background var(--t-fast) var(--ease-out), color var(--t-fast) var(--ease-out), box-shadow var(--t-mid) var(--ease-out), border-color var(--t-fast) var(--ease-out);
  white-space: nowrap;
  cursor: pointer;
}
.btn-arrow {
  display: inline-block;
  width: 20px; height: 1px;
  background: currentColor;
  position: relative;
  transition: width var(--t-fast) var(--ease-out);
}
.btn-arrow::after {
  content: ""; position: absolute; right: 0; top: -3px;
  width: 6px; height: 6px;
  border-top: 1px solid currentColor;
  border-right: 1px solid currentColor;
  transform: rotate(45deg);
}
.btn:hover .btn-arrow { width: 32px; }

.btn-gold {
  background: var(--gold-400);
  color: var(--ink-900);
}
.btn-gold:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 36px -10px var(--gold-glow);
}

.btn-ember {
  background: var(--ember-500);
  color: var(--ink-100);
}
.btn-ember:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 36px -10px var(--ember-glow);
}

.btn-ghost {
  background: transparent;
  color: var(--ink-100);
  border-color: var(--border-mid);
}
.btn-ghost:hover {
  border-color: var(--gold-400);
  color: var(--gold-400);
}

.btn-outline-gold {
  background: transparent;
  color: var(--gold-400);
  border-color: var(--border-gold);
}
.btn-outline-gold:hover {
  background: var(--gold-400);
  color: var(--ink-900);
  border-color: var(--gold-400);
}

/* =====================================================
   Footer
   ===================================================== */
.footer {
  position: relative;
  border-top: 1px solid var(--border-faint);
  padding: var(--space-20) 0 var(--space-12);
  background: var(--ink-900);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: var(--space-12);
  margin-bottom: var(--space-16);
}
@media (max-width: 880px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: var(--space-10); }
}
@media (max-width: 540px) {
  .footer-grid { grid-template-columns: 1fr; }
}
.footer-brand img { height: 44px; margin-bottom: var(--space-5); }
.footer-brand p { color: var(--ink-300); max-width: 28ch; font-size: 14px; line-height: 1.6; }
.footer-col h6 {
  font-family: var(--font-display);
  font-size: 11px; letter-spacing: 0.28em; text-transform: uppercase;
  color: var(--gold-400); margin-bottom: var(--space-5);
}
.footer-col ul { display: flex; flex-direction: column; gap: var(--space-3); }
.footer-col a {
  font-size: 14px; color: var(--ink-200);
  transition: color var(--t-fast) var(--ease-out);
}
.footer-col a:hover { color: var(--gold-400); }
.footer-base {
  display: flex; align-items: center; justify-content: space-between;
  padding-top: var(--space-8);
  border-top: 1px solid var(--border-faint);
  font-size: 12px; color: var(--ink-400);
}
.footer-base .meta { color: var(--ink-400); }
@media (max-width: 540px) {
  .footer-base { flex-direction: column; gap: var(--space-3); align-items: flex-start; }
}

/* =====================================================
   Contact form
   ===================================================== */
.form {
  display: grid;
  gap: var(--space-5);
}
.form-row {
  display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-5);
}
@media (max-width: 640px) { .form-row { grid-template-columns: 1fr; } }
.form-field {
  position: relative;
  display: flex; flex-direction: column;
}
.form-field label {
  font-family: var(--font-display);
  font-size: 11px; letter-spacing: 0.22em; text-transform: uppercase;
  color: var(--ink-300);
  margin-bottom: var(--space-2);
}
.form-field input,
.form-field select,
.form-field textarea {
  background: var(--ink-850);
  border: 1px solid var(--border-soft);
  border-radius: var(--r-md);
  padding: 16px 18px;
  color: var(--ink-100);
  font-size: 15px;
  transition: border-color var(--t-fast) var(--ease-out), background var(--t-fast) var(--ease-out);
  width: 100%;
}
.form-field textarea { min-height: 140px; resize: vertical; }
.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--gold-400);
  background: var(--ink-800);
}

.form-submit {
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--space-5);
  margin-top: var(--space-3);
}
.form-note { font-size: 12px; color: var(--ink-400); }
.form-note a { color: var(--gold-400); border-bottom: 1px solid var(--border-gold); }

.form-toast {
  display: none;
  margin-top: var(--space-4);
  padding: 16px 20px;
  border-radius: var(--r-md);
  background: rgba(232, 184, 75, 0.08);
  border: 1px solid var(--border-gold);
  color: var(--gold-200);
  font-size: 14px;
}
.form-toast.is-show { display: block; }
.form-toast.is-error {
  background: rgba(217, 54, 43, 0.08);
  border-color: var(--border-ember);
  color: var(--ember-300);
}

/* =====================================================
   Floating WhatsApp
   ===================================================== */
.wa-float {
  position: fixed;
  bottom: 24px; right: 24px;
  z-index: var(--z-toast);
  width: 60px; height: 60px;
  border-radius: var(--r-pill);
  background: #25D366;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 14px 36px -8px rgba(37, 211, 102, 0.4);
  transition: transform var(--t-fast) var(--ease-out);
}
.wa-float:hover { transform: translateY(-4px) scale(1.04); }
.wa-float svg { width: 28px; height: 28px; fill: white; }
/* Smaller + closer to the corner on phones so it overlaps less body copy
   (AUDIT.md B15 — screenshot showed it covering the tail end of paragraphs
   on narrow viewports). */
@media (max-width: 480px) {
  .wa-float { width: 48px; height: 48px; bottom: 16px; right: 16px; }
  .wa-float svg { width: 22px; height: 22px; }
}

/* =====================================================
   Generic card
   ===================================================== */
.card {
  position: relative;
  background: var(--glass-tint);
  border: 1px solid var(--border-faint);
  border-radius: var(--r-lg);
  padding: var(--space-8);
  transition: border-color var(--t-mid) var(--ease-out), transform var(--t-mid) var(--ease-out), background var(--t-mid) var(--ease-out);
}
.card:hover {
  border-color: var(--border-soft);
  background: var(--glass-tint-strong);
}

/* =====================================================
   Accessibility
   ===================================================== */
.sr-only {
  position: absolute;
  width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0);
  white-space: nowrap; border: 0;
}

:focus-visible {
  outline: 2px solid var(--gold-400);
  outline-offset: 4px;
  border-radius: var(--r-sm);
}