/* =========================================================
   AQVELIS – Stylesheet
   Statische Website, keine externen Abhaengigkeiten.
   ========================================================= */

:root {
  --color-bg: #f6fbfc;
  --color-surface: #ffffff;
  --color-surface-alt: #eef6f8;
  --color-text: #10242c;
  --color-text-muted: #435a63;
  --color-border: #d7e6ea;

  --color-primary: #0f7ea3;
  --color-primary-dark: #0b5f7d;
  --color-primary-light: #4fb8dd;
  --color-accent: #17b4a0;

  --color-focus: #0b5f7d;

  --font-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica,
    Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji";

  --container-width: 72rem;
  --radius-md: 0.75rem;
  --radius-lg: 1.25rem;
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2rem;
  --space-5: 3rem;
  --space-6: 4.5rem;
  --space-7: 6rem;

  --shadow-sm: 0 1px 2px rgba(16, 36, 44, 0.06), 0 1px 3px rgba(16, 36, 44, 0.08);
  --shadow-md: 0 8px 24px rgba(16, 36, 44, 0.08);
}

/* ---------- Reset ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img,
svg {
  max-width: 100%;
  display: block;
}

h1,
h2,
h3,
h4 {
  line-height: 1.2;
  font-weight: 700;
  margin: 0 0 var(--space-2);
}

p {
  margin: 0 0 var(--space-2);
  color: var(--color-text-muted);
}

a {
  color: var(--color-primary-dark);
}

ul {
  margin: 0;
  padding: 0;
}

/* ---------- Accessibility helpers ---------- */
.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;
}

.skip-link {
  position: absolute;
  left: var(--space-2);
  top: -3rem;
  background: var(--color-primary-dark);
  color: #fff;
  padding: 0.6rem 1rem;
  border-radius: var(--radius-md);
  z-index: 100;
  transition: top 0.15s ease;
}

.skip-link:focus {
  top: var(--space-2);
}

:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 2px;
  border-radius: 4px;
}

/* ---------- Layout ---------- */
.container {
  width: 100%;
  max-width: var(--container-width);
  margin-inline: auto;
  padding-inline: var(--space-3);
}

section {
  padding-block: var(--space-6);
}

.section-heading {
  max-width: 42rem;
  margin-bottom: var(--space-4);
}

.section-heading .eyebrow {
  display: inline-block;
  color: var(--color-primary-dark);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-size: 0.8rem;
  margin-bottom: var(--space-1);
}

.section-heading h2 {
  font-size: clamp(1.6rem, 1.3rem + 1.2vw, 2.25rem);
}

.section-heading p {
  font-size: 1.05rem;
}

.bg-alt {
  background-color: var(--color-surface-alt);
}

/* ---------- Header ---------- */
.site-header {
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 50;
}

.site-header .container {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  padding-block: var(--space-2);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--color-text);
  text-decoration: none;
  letter-spacing: 0.01em;
}

.brand:hover {
  color: var(--color-primary-dark);
}

.brand .brand-mark {
  width: 2rem;
  height: 2rem;
  flex-shrink: 0;
}

.main-nav ul {
  display: flex;
  flex-wrap: wrap;
  list-style: none;
  gap: var(--space-1) var(--space-3);
}

.main-nav a {
  text-decoration: none;
  color: var(--color-text);
  font-weight: 600;
  font-size: 0.98rem;
  padding: 0.35rem 0.15rem;
  border-bottom: 2px solid transparent;
}

.main-nav a:hover {
  color: var(--color-primary-dark);
  border-bottom-color: var(--color-primary-light);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.6rem;
  border-radius: var(--radius-md);
  font-weight: 700;
  text-decoration: none;
  font-size: 1rem;
  border: 2px solid transparent;
  cursor: default;
}

.btn-primary {
  background-color: var(--color-primary-dark);
  color: #fff;
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  overflow: hidden;
  background: linear-gradient(180deg, var(--color-surface-alt) 0%, var(--color-bg) 100%);
  padding-block: var(--space-7) var(--space-6);
}

.hero::before {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 40%;
  background: radial-gradient(120% 100% at 50% 100%, rgba(79, 184, 221, 0.18), transparent 70%);
  pointer-events: none;
}

.hero .container {
  position: relative;
  display: grid;
  gap: var(--space-4);
  justify-items: center;
  text-align: center;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-primary-dark);
  font-weight: 700;
  font-size: 0.85rem;
  padding: 0.4rem 0.9rem;
  border-radius: 999px;
  box-shadow: var(--shadow-sm);
}

.hero-eyebrow .dot {
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background-color: var(--color-accent);
  flex-shrink: 0;
}

.hero h1 {
  font-size: clamp(2.4rem, 1.9rem + 2.2vw, 3.6rem);
  margin-bottom: 0;
}

.hero .tagline {
  font-size: clamp(1.1rem, 1rem + 0.5vw, 1.5rem);
  font-weight: 600;
  color: var(--color-primary-dark);
  margin: 0;
}

.hero .lead {
  max-width: 42rem;
  font-size: 1.1rem;
}

.hero-status {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  background-color: #fff8e6;
  border: 1px solid #f0dca6;
  color: #6b5000;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.7rem 1.1rem;
  border-radius: var(--radius-md);
}

.wave-divider {
  display: block;
  width: 100%;
  height: auto;
  color: var(--color-surface);
}

/* ---------- Feature grid ---------- */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(15.5rem, 1fr));
  gap: var(--space-3);
}

.card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-3);
  box-shadow: var(--shadow-sm);
}

.card .icon {
  width: 2.75rem;
  height: 2.75rem;
  border-radius: var(--radius-md);
  background-color: var(--color-surface-alt);
  color: var(--color-primary-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-2);
}

.card .icon svg {
  width: 1.5rem;
  height: 1.5rem;
}

.card h3 {
  font-size: 1.1rem;
}

.card p {
  margin-bottom: 0;
  font-size: 0.98rem;
}

.card .badge {
  display: inline-block;
  margin-top: var(--space-1);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--color-primary-dark);
  background-color: var(--color-surface-alt);
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
}

/* ---------- Bereiche (Pool / Aquarium) ---------- */
.areas-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(18rem, 1fr));
  gap: var(--space-3);
}

.area-card {
  position: relative;
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  color: #fff;
  overflow: hidden;
  min-height: 16rem;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  box-shadow: var(--shadow-md);
}

.area-card.pool {
  background: linear-gradient(160deg, #0b5f7d 0%, #0f7ea3 55%, #4fb8dd 100%);
}

.area-card.aquarium {
  background: linear-gradient(160deg, #0b4a4a 0%, #0f7d6e 55%, #17b4a0 100%);
}

.area-card .area-icon {
  position: absolute;
  top: var(--space-3);
  right: var(--space-3);
  width: 3rem;
  height: 3rem;
  opacity: 0.85;
}

.area-card h3 {
  font-size: 1.4rem;
  color: #fff;
}

.area-card p {
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 0;
}

/* ---------- Trust section ---------- */
.trust-list {
  list-style: none;
  display: grid;
  gap: var(--space-2);
  max-width: 46rem;
}

.trust-list li {
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
  color: var(--color-text-muted);
}

.trust-list svg {
  flex-shrink: 0;
  width: 1.35rem;
  height: 1.35rem;
  margin-top: 0.15rem;
  color: var(--color-primary);
}

/* ---------- CTA / Status section ---------- */
.status-section {
  background: linear-gradient(160deg, var(--color-primary-dark), var(--color-primary));
  color: #fff;
  border-radius: var(--radius-lg);
  padding: var(--space-5) var(--space-4);
  text-align: center;
  margin-inline: var(--space-3);
}

.status-section h2 {
  color: #fff;
}

.status-section p {
  color: rgba(255, 255, 255, 0.9);
  max-width: 40rem;
  margin-inline: auto;
}

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--color-border);
  background-color: var(--color-surface-alt);
  padding-block: var(--space-4);
  margin-top: var(--space-6);
}

.site-footer .container {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  align-items: center;
  justify-content: space-between;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  color: var(--color-text);
}

.footer-brand .brand-mark {
  width: 1.5rem;
  height: 1.5rem;
}

.footer-nav ul {
  display: flex;
  flex-wrap: wrap;
  list-style: none;
  gap: var(--space-1) var(--space-3);
}

.footer-nav a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 600;
}

.footer-nav a:hover {
  color: var(--color-primary-dark);
  text-decoration: underline;
}

.footer-meta {
  width: 100%;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-top: var(--space-2);
}

/* ---------- Legal / content pages ---------- */
.page-header {
  padding-block: var(--space-6) var(--space-4);
  background-color: var(--color-surface-alt);
  border-bottom: 1px solid var(--color-border);
}

.page-header h1 {
  font-size: clamp(1.9rem, 1.6rem + 1.2vw, 2.6rem);
}

.page-header .lead {
  max-width: 40rem;
  font-size: 1.05rem;
}

.notice-box {
  background-color: #fff8e6;
  border: 1px solid #f0dca6;
  color: #6b5000;
  border-radius: var(--radius-md);
  padding: var(--space-2) var(--space-3);
  margin-block: var(--space-3);
  font-size: 0.98rem;
}

.notice-box strong {
  color: #4a3900;
}

.placeholder {
  background-color: #fdeeee;
  color: #7a1f1f;
  border: 1px dashed #e4a3a3;
  border-radius: 0.3rem;
  padding: 0.05rem 0.4rem;
  font-weight: 700;
  font-size: 0.92em;
  white-space: nowrap;
}

.prose {
  max-width: 46rem;
  padding-block: var(--space-5);
}

.prose h2 {
  font-size: 1.35rem;
  margin-top: var(--space-4);
}

.prose h2:first-child {
  margin-top: 0;
}

.prose ul {
  list-style: disc;
  padding-left: 1.4rem;
  margin-bottom: var(--space-2);
  color: var(--color-text-muted);
}

.prose li {
  margin-bottom: 0.4rem;
}

.prose a {
  color: var(--color-primary-dark);
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-weight: 600;
  text-decoration: none;
  margin-bottom: var(--space-3);
}

/* ---------- Responsive ---------- */
@media (max-width: 40rem) {
  .site-header .container {
    justify-content: center;
    text-align: center;
  }

  .main-nav ul {
    justify-content: center;
  }

  .status-section {
    margin-inline: var(--space-2);
    padding: var(--space-4) var(--space-2);
  }

  .footer-nav ul {
    justify-content: center;
  }

  .site-footer .container {
    justify-content: center;
    text-align: center;
  }
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  * {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}