/* ============================================================
   NAV.CSS — Kolkowsky GmbH Navigation
   ============================================================ */

#main-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: 68px;
  display: flex;
  align-items: center;
  transition: background-color 0.35s ease, box-shadow 0.35s ease;
}

#main-nav.nav-transparent {
  background-color: transparent;
}

#main-nav.nav-solid {
  background-color: var(--color-white);
  box-shadow: var(--shadow-nav);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  width: 100%;
  padding: 0 clamp(1.25rem, 4vw, 2.5rem);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  text-decoration: none;
  transition: opacity var(--transition);
}

.nav-logo:hover { opacity: 0.85; }

.nav-logo__icon {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  transition: color var(--transition);
}

.nav-transparent .nav-logo__icon { color: var(--color-white); }
.nav-solid      .nav-logo__icon { color: var(--color-accent); }

.nav-logo__text {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  line-height: 1;
  transition: color var(--transition);
}

.nav-transparent .nav-logo__text { color: var(--color-white); }
.nav-solid      .nav-logo__text { color: var(--color-text); }

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

.nav-links a {
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 0.4rem 0.75rem;
  border-radius: 6px;
  position: relative;
  transition: color var(--transition), background-color var(--transition);
  text-decoration: none;
  letter-spacing: 0.01em;
}

.nav-transparent .nav-links a {
  color: rgba(255,255,255,0.85);
}

.nav-transparent .nav-links a:hover {
  color: var(--color-white);
  background: rgba(255,255,255,0.1);
}

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

.nav-solid .nav-links a:hover {
  color: var(--color-accent);
  background: rgba(37,99,168,0.07);
}

.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0.75rem;
  right: 0.75rem;
  height: 2px;
  border-radius: 2px;
  background: var(--color-accent);
}

.nav-transparent .nav-links a.active::after {
  background: var(--color-white);
}

.nav-solid .nav-links a.active {
  color: var(--color-accent);
}

.nav-cta {
  margin-left: 0.5rem;
  padding: 0.45rem 1.1rem !important;
  background-color: var(--color-accent);
  color: var(--color-white) !important;
  border-radius: var(--radius-btn);
  transition: background-color var(--transition), transform var(--transition), box-shadow var(--transition) !important;
}

.nav-cta:hover {
  background-color: var(--color-accent-hover) !important;
  transform: scale(1.03);
  box-shadow: 0 2px 12px rgba(37,99,168,0.4);
}

.nav-cta.active::after { display: none; }

.nav-hamburger {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 28px;
  height: 20px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  gap: 6px;
  z-index: 1100;
}

.nav-hamburger span {
  display: block;
  height: 2px;
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease, background-color var(--transition);
}

.nav-transparent .nav-hamburger span { background: var(--color-white); }
.nav-solid      .nav-hamburger span { background: var(--color-text); }

/* ── Mobile slide-in drawer ──────────────────────────── */

.nav-mobile-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  z-index: 1098;
  opacity: 0;
  transition: opacity 0.35s ease;
  pointer-events: none;
}

.nav-mobile-backdrop.open {
  opacity: 1;
  pointer-events: all;
}

/* Outer container — slides in, clips the panel row */
.nav-mobile-overlay {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 1099;
  display: flex;
  overflow: hidden;
  transform: translateX(-100%);
  transition: transform 0.38s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-mobile-overlay.open {
  transform: translateX(0);
}

/* Inner flex row holds both panels */
.nav-mobile-panel {
  display: flex;
  flex-direction: row;
  height: 100%;
}

/* ── Left: items panel ───────────────────────────────── */

.nav-mobile-items {
  width: min(360px, 90vw);
  flex-shrink: 0;
  background: #fff;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  box-shadow: 4px 0 32px rgba(0, 0, 0, 0.1);
  position: relative;
  transition: transform 0.28s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-mobile-close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
  cursor: pointer;
  color: #222;
  padding: 0;
  z-index: 1;
  transition: opacity 0.2s;
  touch-action: manipulation;
  font-size: 32px;
  line-height: 1;
  font-weight: 300;
}

.nav-mobile-close:hover { opacity: 0.5; }

.nav-mobile-items nav {
  margin-top: 68px;
  display: flex;
  flex-direction: column;
}

/* Shared style for both <a> and <button> nav items */
.nav-mobile-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 1rem 1.4rem;
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 500;
  color: #1a1a1a;
  text-decoration: none;
  background: none;
  border: none;
  border-bottom: 1px solid #ebebeb;
  cursor: pointer;
  text-align: left;
  letter-spacing: 0.01em;
  transition: background 0.15s ease, color 0.15s ease;
}

.nav-mobile-items nav > .nav-mobile-link:first-child {
  border-top: 1px solid #ebebeb;
}

.nav-mobile-link:hover,
.nav-mobile-link[aria-expanded="true"] {
  background: #f5f5f5;
  color: var(--color-accent);
}

.nav-mobile-link.active {
  color: var(--color-accent);
  font-weight: 600;
}

.nav-mobile-arrow {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  opacity: 0.35;
  transition: opacity 0.15s, transform 0.2s;
}

.nav-mobile-link:hover .nav-mobile-arrow,
.nav-mobile-link.active .nav-mobile-arrow,
.nav-mobile-link[aria-expanded="true"] .nav-mobile-arrow {
  opacity: 1;
}

.nav-mobile-phone {
  margin-top: auto;
  padding: 1.25rem 1.4rem;
  border-top: 1px solid #ebebeb;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.nav-mobile-phone svg {
  width: 15px;
  height: 15px;
  flex-shrink: 0;
  color: #999;
}

.nav-mobile-phone a {
  font-family: var(--font-body);
  font-size: 0.875rem;
  color: #666;
  font-weight: 400;
  text-decoration: none;
  transition: color 0.15s;
}

.nav-mobile-phone a:hover { color: var(--color-accent); }

/* ── Right: submenu panel ────────────────────────────── */

.nav-mobile-submenu-panel {
  width: 0;
  overflow: hidden;
  flex-shrink: 0;
  background: #f8f8f8;
  border-left: 1px solid #e8e8e8;
  display: flex;
  flex-direction: column;
  transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-mobile-submenu-panel.active {
  width: min(400px, 50vw);
  overflow-y: auto;
}

/* Back button (visible on mobile only) */
.submenu-back {
  display: none;
  align-items: center;
  gap: 0.4rem;
  padding: 1rem 1.25rem;
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 500;
  color: #666;
  background: none;
  border: none;
  border-bottom: 1px solid #e8e8e8;
  cursor: pointer;
  transition: color 0.15s;
}

.submenu-back svg { width: 16px; height: 16px; }
.submenu-back:hover { color: var(--color-accent); }

.submenu-label {
  padding: 1.5rem 1.25rem 0.75rem;
  font-family: var(--font-body);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: #999;
  white-space: nowrap;
}

.submenu-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  padding: 0 1.25rem 1.25rem;
}

.submenu-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.55rem;
  padding: 1rem 0.75rem;
  background: #fff;
  border-radius: 8px;
  text-decoration: none;
  color: #1a1a1a;
  font-family: var(--font-body);
  font-size: 0.78rem;
  font-weight: 500;
  text-align: center;
  line-height: 1.3;
  transition: box-shadow 0.15s;
}

.submenu-card:hover {
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.09);
}

.submenu-card__icon {
  width: 42px;
  height: 42px;
  background: rgba(37, 99, 168, 0.08);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.submenu-card__icon svg {
  width: 20px;
  height: 20px;
  color: var(--color-accent);
}

.submenu-all-link {
  display: block;
  margin-top: auto;
  padding: 0.9rem 1.25rem;
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-accent);
  text-decoration: none;
  border-top: 1px solid #e8e8e8;
  white-space: nowrap;
  transition: color 0.15s;
}

.submenu-all-link:hover { color: var(--color-accent-hover); }

/* ── On small screens: submenu slides on top ─────────── */

@media (max-width: 600px) {
  .nav-mobile-overlay {
    inset: 0;
    width: 100vw;
    height: 100dvh;
    background: #fff;
  }

  .nav-mobile-panel {
    width: 100%;
  }

  .nav-mobile-items {
    width: 100%;
    min-width: 100%;
    height: 100%;
  }

  /* Items slide left when submenu is open */
  .nav-mobile-overlay.submenu-open .nav-mobile-items {
    transform: translateX(-100%);
  }

  /* Submenu sits at the left edge as an absolute overlay */
  .nav-mobile-submenu-panel {
    position: absolute;
    inset: 0;
    width: 100% !important;
    height: 100%;
    transform: translateX(100%);
    transition: transform 0.28s cubic-bezier(0.4, 0, 0.2, 1) !important;
    overflow: hidden !important;
  }

  .nav-mobile-submenu-panel.active {
    transform: translateX(0);
    overflow-y: auto !important;
  }

  .submenu-back { display: flex; }
}

/* ── Responsive breakpoints ──────────────────────────── */

@media (max-width: 768px) {
  .nav-links    { display: none; }
  .nav-hamburger { display: flex; }
  .nav-mobile-backdrop { display: block; }
}