/* ============================================================
   nav.css — Floating-Pill-Nav + Mobile-Drawer (Task 4)
   Per spec/v2/02-DESIGN-SYSTEM §10 + 03-HOMEPAGE-WIREFRAME.
   ============================================================ */

/* ---------- Site-Header (sticky wrapper) ---------- */

.site-header {
  position: sticky;
  inset-block-start: 0;
  z-index: var(--z-nav-pill);
  /* env() für iPhone-Notch / status-bar: Pill sitzt unter dem Notch */
  padding-block-start: calc(clamp(var(--space-2), 1.5vw, var(--space-3)) + env(safe-area-inset-top, 0px));
  padding-block-end: var(--space-2);
}

/* ---------- Pill-Nav (the floating pill itself) ---------- */

.pill-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-2) var(--space-3) var(--space-2) var(--space-5);
  border-radius: var(--radius-pill);
  border: 1px solid var(--border-subtle);
  background-color: oklch(100% 0 0 / 0.78);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  box-shadow: var(--shadow-xs);
  transition:
    background-color var(--dur-normal) var(--ease-out),
    border-color var(--dur-normal) var(--ease-out),
    box-shadow var(--dur-normal) var(--ease-out);
}

.site-header[data-scroll-state='scrolled'] .pill-nav {
  background-color: oklch(100% 0 0 / 0.92);
  border-color: var(--border-strong);
  box-shadow: var(--shadow-md);
}

/* Dark-Mode pill background */
[data-theme='dark'] .pill-nav {
  background-color: oklch(15% 0.022 270 / 0.72);
  border-color: oklch(28% 0.024 270);
}

[data-theme='dark'] .site-header[data-scroll-state='scrolled'] .pill-nav {
  background-color: oklch(15% 0.022 270 / 0.9);
  border-color: oklch(34% 0.026 270);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme='light']) .pill-nav {
    background-color: oklch(15% 0.022 270 / 0.72);
    border-color: oklch(28% 0.024 270);
  }
  :root:not([data-theme='light']) .site-header[data-scroll-state='scrolled'] .pill-nav {
    background-color: oklch(15% 0.022 270 / 0.9);
    border-color: oklch(34% 0.026 270);
  }
}

/* Fallback if no backdrop-filter support */
@supports not (backdrop-filter: blur(1px)) {
  .pill-nav {
    background-color: var(--bg-surface);
  }
}

/* ---------- Brand (Logo/Wordmark) ---------- */

.pill-nav__brand {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-display);
  font-weight: var(--fw-semibold);
  font-size: var(--fs-body-lg);
  color: var(--text-primary);
  text-decoration: none;
  letter-spacing: -0.01em;
  padding-inline: var(--space-1);
}

@media (hover: hover) {
  .pill-nav__brand:hover {
    color: var(--brand-600);
  }
}

/* ---------- Right-Group (items + cta + burger) ---------- */

.pill-nav__right {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

/* ---------- Nav-Items (desktop) ---------- */

.pill-nav__items {
  --cluster-gap: var(--space-5);
  list-style: none;
  margin: 0;
  padding: 0;
}

.pill-nav__items li + li {
  margin-block-start: 0;
}

.pill-nav__items a {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: var(--fw-medium);
  font-size: var(--fs-body-md);
  padding-block: var(--space-1);
  position: relative;
  transition: color var(--dur-fast) var(--ease-out);
}

@media (hover: hover) {
  .pill-nav__items a:hover {
    color: var(--text-primary);
  }
}

.pill-nav__items a[aria-current='page'] {
  color: var(--text-primary);
}

.pill-nav__items a[aria-current='page']::after {
  content: '';
  position: absolute;
  inset-inline: 0;
  inset-block-end: -4px;
  height: 2px;
  background: var(--brand-500);
  border-radius: var(--radius-xs);
}

/* CTA is now rendered via components/button.njk (Task 5 refactor).
   Spec'd as: variant="primary" size="sm" shape="pill" + class="hide-on-mobile". */

/* ---------- Burger (mobile only) ---------- */

.pill-nav__burger {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: none;
  background: transparent;
  cursor: pointer;
  border-radius: var(--radius-md);
  color: var(--text-primary);
  transition: background-color var(--dur-fast) var(--ease-out);
}

@media (hover: hover) {
  .pill-nav__burger:hover {
    background-color: var(--action-ghost-hover);
  }
}

@media (max-width: 767px) {
  .pill-nav__burger {
    display: inline-flex;
  }
}

.pill-nav__burger-icon {
  display: inline-flex;
  flex-direction: column;
  justify-content: space-between;
  width: 18px;
  height: 14px;
}

.pill-nav__burger-icon span {
  display: block;
  height: 2px;
  background-color: currentColor;
  border-radius: 1px;
  transition:
    transform var(--dur-fast) var(--ease-out),
    opacity var(--dur-fast) var(--ease-out);
}

.pill-nav__burger[aria-expanded='true'] .pill-nav__burger-icon span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.pill-nav__burger[aria-expanded='true'] .pill-nav__burger-icon span:nth-child(2) {
  opacity: 0;
}

.pill-nav__burger[aria-expanded='true'] .pill-nav__burger-icon span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* ---------- Mobile-Drawer (<dialog>) ---------- */

.drawer {
  /* native dialog reset */
  margin: 0;
  padding: 0;
  border: none;
  max-width: none;
  max-height: none;
  width: min(86vw, 22rem);
  height: 100dvh;
  inset-block-start: 0;
  inset-inline-end: 0;
  inset-inline-start: auto;
  background-color: var(--bg-surface);
  color: var(--text-primary);
  border-inline-start: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-xl);
  overflow-y: auto;
  overscroll-behavior: contain;
}

.drawer:not([open]) {
  display: none;
}

.drawer[open] {
  animation: drawer-slide-in var(--dur-normal) var(--ease-out) both;
}

.drawer::backdrop {
  background-color: var(--bg-overlay);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  animation: drawer-backdrop-fade var(--dur-fast) var(--ease-out) both;
}

@keyframes drawer-slide-in {
  from {
    transform: translateX(100%);
  }
  to {
    transform: translateX(0);
  }
}

@keyframes drawer-backdrop-fade {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .drawer[open],
  .drawer::backdrop {
    animation: none;
  }
}

.drawer__inner {
  padding: var(--space-5);
  padding-block-start: calc(var(--space-5) + env(safe-area-inset-top, 0));
  padding-block-end: calc(var(--space-5) + env(safe-area-inset-bottom, 0));
}

.drawer__top {
  --cluster-justify: space-between;
}

.drawer__brand {
  display: inline-flex;
  align-items: center;
  min-height: 44px; /* touch-target ≥44px (WCAG 2.5.8) */
  padding-inline: var(--space-1);
  font-family: var(--font-display);
  font-weight: var(--fw-semibold);
  font-size: var(--fs-headline-sm);
  color: var(--text-primary);
  text-decoration: none;
}

.drawer__close {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-size: var(--fs-headline-md);
  line-height: 1;
  cursor: pointer;
  border-radius: var(--radius-md);
  transition: background-color var(--dur-fast) var(--ease-out);
}

@media (hover: hover) {
  .drawer__close:hover {
    background-color: var(--action-ghost-hover);
    color: var(--text-primary);
  }
}

.drawer__link {
  display: block;
  padding: var(--space-3) var(--space-2);
  font-size: var(--fs-body-lg);
  font-weight: var(--fw-medium);
  color: var(--text-primary);
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: background-color var(--dur-fast) var(--ease-out);
}

@media (hover: hover) {
  .drawer__link:hover {
    background-color: var(--action-ghost-hover);
    color: var(--brand-700);
  }
}

.drawer__link[aria-current='page'] {
  background-color: oklch(52% 0.22 270 / 0.1);
  color: var(--brand-700);
}

/* Drawer CTAs are now rendered via components/button.njk (Task 5 refactor).
   Both primary + secondary, size="md", full=true. */

/* Body-Scroll-Lock when drawer is open */
body:has(.drawer[open]) {
  overflow: hidden;
}

/* iPad / Tablet — keep pill but allow drawer too if width <768 */
@media (min-width: 768px) {
  .drawer {
    display: none !important;
  }
}