/* ==========================================================================
   Layout — Header, Footer, Navigation, Grundraster
   ========================================================================== */

/* ---- Header ---- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in srgb, var(--color-bg) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  transition: background-color var(--transition-mode), border-color var(--transition-mode);
}

.site-header__inner {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  padding-block: var(--space-3);
}

/* Echte PTS-Bildmarke (Buchstaben + Becken) links, Firmenname und Slogan als
   Text daneben — wie das Original-Logo, nur liegend statt gestapelt. Die Farbe
   kommt allein aus der Bildmarke, der Text bleibt ruhig. */
.site-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-heading);
  text-decoration: none;
  white-space: nowrap;
}
.site-logo:hover { color: var(--color-heading); }
.site-logo__mark { height: 40px; width: auto; flex-shrink: 0; }
.site-logo__text {
  display: flex;
  flex-direction: column;
  font-weight: 700;
  font-size: var(--fs-500);
  line-height: 1.15;
}
.site-logo__tagline {
  font-size: var(--fs-200);
  font-weight: 500;
  color: var(--color-text-muted);
  margin-top: 2px;
}
.site-logo--footer .site-logo__mark { height: 52px; }

/* Sechs Navigationspunkte plus Modus-Schalter plus CTA passen nicht in die
   1200px des normalen Containers. Deshalb darf allein die Kopfzeile breiter
   laufen; alle Inhalte darunter behalten ihre Breite. */
.site-header__inner { max-width: 1400px; }

.site-nav { flex: 1; }
.site-nav__list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  list-style: none;
  padding: 0;
  margin: 0;
}
.site-nav__list a {
  color: var(--color-text);
  text-decoration: none;
  font-weight: 600;
  font-size: var(--fs-300);
  padding-block: var(--space-2);
  border-bottom: 2px solid transparent;
}
.site-nav__list a:hover,
.site-nav__list a[aria-current="page"] {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

/* Der Kostencheck ist kein weiteres Kapitel der Seite, sondern ein Werkzeug —
   deshalb als Pille statt als Textlink, aber dezenter als die Haupt-CTA. */
.site-nav__calc {
  display: inline-flex;
  margin-left: var(--space-2);
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4) !important;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-full);
  border-bottom-color: var(--color-border-strong) !important;
  color: var(--color-accent) !important;
  white-space: nowrap;
}
.site-nav__calc:hover {
  border-color: var(--color-accent);
  border-bottom-color: var(--color-accent) !important;
  background: var(--color-bg-alt);
}
.site-nav__calc::before {
  content: "";
  width: 15px; height: 15px;
  flex-shrink: 0;
  background: currentColor;
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Crect x='4' y='2' width='16' height='20' rx='2'/%3E%3Cpath d='M8 6h8'/%3E%3Cpath d='M8 11h.01M12 11h.01M16 11h.01M8 15h.01M12 15h.01M16 15h.01M8 19h8'/%3E%3C/svg%3E") center / contain no-repeat;
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Crect x='4' y='2' width='16' height='20' rx='2'/%3E%3Cpath d='M8 6h8'/%3E%3Cpath d='M8 11h.01M12 11h.01M16 11h.01M8 15h.01M12 15h.01M16 15h.01M8 19h8'/%3E%3C/svg%3E") center / contain no-repeat;
}

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

.mode-switch {
  display: inline-flex;
  padding: 3px;
  background: var(--color-surface);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-full);
  gap: 2px;
}
.mode-switch__btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  border: none;
  background: transparent;
  color: var(--color-text-muted);
  font-weight: 700;
  font-size: var(--fs-300);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}
.mode-switch__btn svg { width: 16px; height: 16px; }
.mode-switch__btn[aria-pressed="true"] {
  background: var(--gradient-accent);
  color: var(--color-accent-contrast);
}
.mode-switch__btn:not([aria-pressed="true"]):hover { color: var(--color-accent); }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  cursor: pointer;
}
.nav-toggle__bars,
.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  display: block;
  width: 18px;
  height: 2px;
  background: var(--color-heading);
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}
.nav-toggle__bars::before { transform: translateY(-6px); }
.nav-toggle__bars::after { transform: translateY(4px); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before { transform: translateY(0) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after { transform: translateY(-2px) rotate(-45deg); }

/* Unter voller Kopfzeilenbreite ist neben dem Symbol kein Platz mehr für das
   Wort. Es steht dann klein darunter statt zu verschwinden — sonst erkennen
   neue Besucher nicht, dass der Schalter zwischen Pool und Teich wechselt
   (und Screenreader fänden zwei Knöpfe ohne Namen). */
@media (max-width: 1399px) {
  /* Gestapelte Knöpfe sind fast quadratisch — als Pille würden die runden
     Enden das Wort anschneiden, daher weich abgerundete Rechtecke. */
  .mode-switch { border-radius: 14px; }
  .mode-switch__btn {
    flex-direction: column;
    gap: 2px;
    min-width: 46px;
    padding: 4px var(--space-2) 3px;
    border-radius: 11px;
  }
  .mode-switch__btn svg { width: 14px; height: 14px; }
  .mode-switch__text {
    font-size: 0.6875rem;
    line-height: 1;
    letter-spacing: 0.01em;
  }
}

@media (max-width: 1240px) {
  .site-header__inner { flex-wrap: wrap; row-gap: var(--space-3); }
  .site-header__actions { margin-left: auto; }
  .site-nav {
    order: 3;
    flex-basis: 100%;
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-base);
  }
  .site-nav.is-open { max-height: 320px; }
  .site-nav__list { flex-direction: column; gap: 0; padding-block: var(--space-3); }
  .site-nav__list a { display: block; padding-block: var(--space-3); }
  .site-header__cta { display: none; }
  .nav-toggle { display: flex; }
}

/* Handy: Logo, Pool/Teich-Schalter und Menü-Knopf sollen in einer Zeile
   bleiben. Dafür fällt der Slogan weg und der Name steht zweizeilig
   („Pool &“ / „Teichservice“) — passt so bis 360 px Breite. Einzeilig
   bräuchte die Kopfzeile mindestens 435 px, daher die Grenze bei 480 px. */
@media (max-width: 480px) {
  .site-header__inner { column-gap: var(--space-2); }
  .site-header__actions { gap: var(--space-2); }
  .mode-switch__btn { min-width: 40px; padding-inline: 6px; }
  .site-header .site-logo { gap: var(--space-2); }
  .site-header .site-logo__mark { height: 36px; }
  .site-header .site-logo__text { font-size: var(--fs-300); }
  .site-logo__break { display: block; }
  .site-logo__tagline { display: none; }
}

/* ---- Footer ---- */
.site-footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding-block: var(--space-8) var(--space-6);
  transition: background-color var(--transition-mode), border-color var(--transition-mode);
}
.site-footer__grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: var(--space-7);
}
@media (max-width: 760px) {
  .site-footer__grid { grid-template-columns: 1fr 1fr; }
}
.site-footer__brand p { margin-top: var(--space-3); color: var(--color-text-muted); max-width: 32ch; }
.site-footer__heading {
  font-size: var(--fs-300);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-3);
  font-family: var(--font-body);
  font-style: normal;
  font-weight: 700;
}
.site-footer nav ul { list-style: none; padding: 0; margin: 0; display: grid; gap: var(--space-2); }
.site-footer nav a { color: var(--color-text); text-decoration: none; font-size: var(--fs-300); }
.site-footer nav a:hover { color: var(--color-accent); }
.site-footer address { font-style: normal; font-size: var(--fs-300); color: var(--color-text); line-height: var(--line-normal); }
.site-footer address a { color: var(--color-text); text-decoration: none; }
.site-footer address a:hover { color: var(--color-accent); }

.site-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-3);
  margin-top: var(--space-8);
  padding-top: var(--space-5);
  border-top: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: var(--fs-200);
}
.site-footer__legal { list-style: none; display: flex; gap: var(--space-5); padding: 0; margin: 0; }
.site-footer__legal a { color: var(--color-text-muted); text-decoration: none; }
.site-footer__legal a:hover { color: var(--color-accent); }

/* Hinweis auf den Webdesigner — eigene kleine Zeile unter Copyright und
   Rechtlichem. Der Knopf in WhatsApp-Grün, damit er sofort erkennbar ist. */
.site-credit {
  flex-basis: 100%;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2) var(--space-3);
  margin: 0;
}
.site-credit__wa {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px 4px 9px;
  border-radius: var(--radius-full);
  background: var(--color-whatsapp);
  color: var(--color-whatsapp-text);
  font-weight: 700;
  text-decoration: none;
  white-space: nowrap;
  transition: background-color var(--transition-fast);
}
.site-credit__wa:hover {
  background: var(--color-whatsapp-hover);
  color: var(--color-whatsapp-text);
}
.site-credit__wa svg { width: 15px; height: 15px; flex-shrink: 0; }

/* ---- Grund-Grids ---- */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-7); align-items: center; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-5); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-5); }
@media (max-width: 900px) {
  .grid-2 { grid-template-columns: 1fr; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 620px) {
  .grid-3 { grid-template-columns: 1fr; }
  .grid-4 { grid-template-columns: 1fr; }
}