/* =========================================================================
   Lake Constance Travel Guide — stylesheet
   Plain CSS, no framework. Light/dark aware via CSS custom properties.
   ========================================================================= */

:root {
  color-scheme: light dark;

  /* Palette */
  --color-bg: #ffffff;
  --color-surface: #f8fafc;
  --color-surface-2: #f1f5f9;
  --color-text: #1e293b;
  --color-muted: #64748b;
  --color-accent: #0d7490;       /* lake teal */
  --color-accent-strong: #0e5e73;
  --color-accent-soft: #cffafe;
  --color-sun: #f59e0b;          /* summer accent */
  --color-border: #e2e8f0;
  --color-shadow: rgba(15, 23, 42, 0.08);

  /* Layout */
  --maxw: 1080px;
  --radius: 14px;
  --radius-sm: 9px;
  --gap: 1.5rem;

  --font: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial,
    sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #0b1220;
    --color-surface: #0f172a;
    --color-surface-2: #15213a;
    --color-text: #e2e8f0;
    --color-muted: #94a3b8;
    --color-accent: #22d3ee;
    --color-accent-strong: #67e8f9;
    --color-accent-soft: #0e3a47;
    --color-sun: #fbbf24;
    --color-border: #1e293b;
    --color-shadow: rgba(0, 0, 0, 0.4);
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

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

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

a {
  text-decoration: none;
  color: var(--color-accent);
}
a:hover { text-decoration: underline; }

h1, h2, h3 { line-height: 1.2; }

/* ---- Layout helpers ---------------------------------------------------- */

.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: 1.25rem;
}

.section { padding-block: 3.5rem; }
.section--tight { padding-block: 2rem; }
.section--surface { background: var(--color-surface); }

.section__head { max-width: 42rem; margin-bottom: 2rem; }
.section__head h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  margin: 0 0 0.5rem;
}
.section__head p { color: var(--color-muted); margin: 0; font-size: 1.05rem; }

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--color-accent);
  margin: 0 0 0.4rem;
}

/* ---- Header / nav ------------------------------------------------------ */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--color-bg) 88%, transparent);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--color-border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 0.7rem;
  position: relative;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-weight: 800;
  font-size: 1.05rem;
  color: var(--color-text);
}
.brand:hover { text-decoration: none; }
.brand svg { width: 26px; height: 26px; }
.brand span small {
  display: block;
  font-weight: 500;
  font-size: 0.72rem;
  color: var(--color-muted);
  letter-spacing: 0.02em;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav__links a {
  display: block;
  padding: 0.5rem 0.8rem;
  border-radius: var(--radius-sm);
  color: var(--color-text);
  font-weight: 600;
  font-size: 0.95rem;
}
.nav__links a:hover { background: var(--color-surface-2); text-decoration: none; }
.nav__links a[aria-current="page"] {
  color: var(--color-accent);
  background: var(--color-accent-soft);
}

.nav__toggle {
  display: none;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 0.45rem 0.6rem;
  color: var(--color-text);
  cursor: pointer;
  font-size: 1.1rem;
  line-height: 1;
}

@media (max-width: 760px) {
  .nav__toggle { display: inline-flex; }
  .nav__links {
    position: absolute;
    inset: 100% 0 auto 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0.15rem;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    padding: 0.6rem 1.25rem 1rem;
    box-shadow: 0 16px 30px -18px var(--color-shadow);
    display: none;
  }
  .nav__links.is-open { display: flex; }
  .nav__links a { padding: 0.7rem 0.8rem; }
}

/* ---- Hero -------------------------------------------------------------- */

.hero {
  position: relative;
  color: #f8fafc;
  background:
    linear-gradient(180deg, rgba(8, 47, 73, 0.25), rgba(8, 47, 73, 0.75)),
    linear-gradient(120deg, #0e7490 0%, #0891b2 40%, #155e75 100%);
  overflow: hidden;
}
.hero::after {
  /* gentle wave silhouette */
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -1px;
  height: 60px;
  background: var(--color-bg);
  clip-path: polygon(0 60%, 12% 52%, 26% 60%, 40% 48%, 56% 60%, 72% 50%,
    86% 60%, 100% 52%, 100% 100%, 0 100%);
}
.hero__inner {
  position: relative;
  z-index: 1;
  padding-block: clamp(3rem, 8vw, 5.5rem) 4.5rem;
  max-width: 46rem;
}
.hero h1 {
  font-size: clamp(2rem, 6vw, 3.4rem);
  margin: 0.4rem 0 0.6rem;
  letter-spacing: -0.01em;
}
.hero p { font-size: clamp(1.05rem, 2.2vw, 1.3rem); margin: 0 0 1.6rem; opacity: 0.95; }
.hero .eyebrow { color: #a5f3fc; }

.hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1.4rem;
}
.hero__meta .chip {
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.25);
  color: #f0f9ff;
}

/* Compact hero for interior pages */
.page-hero {
  position: relative;
  color: #f8fafc;
  background:
    linear-gradient(180deg, rgba(8, 47, 73, 0.2), rgba(8, 47, 73, 0.7)),
    linear-gradient(120deg, #0e7490 0%, #0891b2 45%, #155e75 100%);
}
.page-hero__inner { padding-block: clamp(2.2rem, 6vw, 3.4rem); max-width: 46rem; }
.page-hero h1 { font-size: clamp(1.8rem, 5vw, 2.8rem); margin: 0.3rem 0 0.5rem; }
.page-hero p { margin: 0; font-size: 1.1rem; opacity: 0.95; }
.page-hero .eyebrow { color: #a5f3fc; }

/* ---- Buttons ----------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.7rem 1.2rem;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.98rem;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform 0.05s ease, box-shadow 0.15s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn--primary {
  background: var(--color-sun);
  color: #422006;
  box-shadow: 0 10px 24px -12px rgba(245, 158, 11, 0.9);
}
.btn--ghost {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.4);
  color: #f8fafc;
}
.btn--outline {
  background: transparent;
  border-color: var(--color-border);
  color: var(--color-text);
}

.btn-row { display: flex; flex-wrap: wrap; gap: 0.7rem; }

/* ---- Chips / badges ---------------------------------------------------- */

.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.25rem 0.65rem;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
  background: var(--color-surface-2);
  color: var(--color-muted);
  border: 1px solid var(--color-border);
}
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.01em;
}
.badge--kids { background: #dcfce7; color: #166534; }
.badge--rain { background: #e0e7ff; color: #3730a3; }
.badge--july { background: #fef3c7; color: #92400e; }
.badge--free { background: #cffafe; color: #155e75; }
@media (prefers-color-scheme: dark) {
  .badge--kids { background: #14532d; color: #bbf7d0; }
  .badge--rain { background: #1e1b4b; color: #c7d2fe; }
  .badge--july { background: #451a03; color: #fde68a; }
  .badge--free { background: #083344; color: #a5f3fc; }
}

/* ---- Cards ------------------------------------------------------------- */

.grid {
  display: grid;
  gap: var(--gap);
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
}

.card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.4rem;
  box-shadow: 0 1px 0 var(--color-shadow);
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  transition: transform 0.12s ease, box-shadow 0.15s ease, border-color 0.15s;
}
.card:hover {
  transform: translateY(-3px);
  box-shadow: 0 18px 36px -22px var(--color-shadow);
  border-color: color-mix(in srgb, var(--color-accent) 40%, var(--color-border));
}
.card__icon {
  font-size: 1.7rem;
  width: 48px; height: 48px;
  display: grid; place-items: center;
  border-radius: 12px;
  background: var(--color-accent-soft);
}
.card h3 { margin: 0; font-size: 1.15rem; }
.card p { margin: 0; color: var(--color-muted); font-size: 0.97rem; }
.card .meta {
  display: flex; flex-wrap: wrap; gap: 0.35rem;
  margin-top: auto; padding-top: 0.4rem;
}
.card .where {
  font-size: 0.82rem; font-weight: 600; color: var(--color-accent);
}

/* Highlight card variant used on the home page */
.feature {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--gap);
}
.feature .card { gap: 0.5rem; }

/* ---- Info / callouts --------------------------------------------------- */

.callout {
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-sun);
  background: var(--color-surface);
  border-radius: var(--radius-sm);
  padding: 1rem 1.2rem;
}
.callout h3 { margin: 0 0 0.3rem; font-size: 1.05rem; }
.callout p { margin: 0; color: var(--color-muted); }

/* Itinerary / day-trip blocks */
.trip {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--color-bg);
}
.trip__head {
  padding: 1.1rem 1.3rem;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}
.trip__head h3 { margin: 0 0 0.2rem; }
.trip__head p { margin: 0; color: var(--color-muted); font-size: 0.92rem; }
.trip__body { padding: 1.1rem 1.3rem; }
.timeline { list-style: none; margin: 0; padding: 0; }
.timeline li {
  display: grid;
  grid-template-columns: 5.5rem 1fr;
  gap: 0.8rem;
  padding: 0.55rem 0;
  border-bottom: 1px dashed var(--color-border);
}
.timeline li:last-child { border-bottom: 0; }
.timeline .t { font-weight: 700; color: var(--color-accent); font-size: 0.92rem; }

/* Simple prose lists */
.list-clean { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.6rem; }
.list-clean li { padding-left: 1.5rem; position: relative; }
.list-clean li::before {
  content: "›";
  position: absolute; left: 0; top: -1px;
  color: var(--color-accent); font-weight: 800;
}

/* Tables (practical info) */
.table-wrap { overflow-x: auto; }
table.info {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}
table.info th, table.info td {
  text-align: left;
  padding: 0.7rem 0.8rem;
  border-bottom: 1px solid var(--color-border);
  vertical-align: top;
}
table.info th { color: var(--color-text); }
table.info tr:hover td { background: var(--color-surface); }

/* ---- Prose page (about/docs) ------------------------------------------ */

.prose { max-width: 46rem; }
.prose h2 { margin-top: 2.2rem; }
.prose h3 { margin-top: 1.6rem; }
.prose p, .prose li { color: var(--color-text); }
.prose ul, .prose ol { padding-left: 1.2rem; }
.prose li { margin: 0.3rem 0; }

/* ---- Footer ------------------------------------------------------------ */

.site-footer {
  border-top: 1px solid var(--color-border);
  background: var(--color-surface);
  padding-block: 2.2rem;
  margin-top: 1rem;
  font-size: 0.92rem;
}
.site-footer .container {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 2rem;
  justify-content: space-between;
  align-items: flex-start;
}
.site-footer h4 { margin: 0 0 0.5rem; font-size: 0.95rem; }
.site-footer ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.3rem; }
.site-footer a { color: var(--color-muted); }
.site-footer a:hover { color: var(--color-accent); }
.site-footer .muted { color: var(--color-muted); max-width: 22rem; }

/* ---- Utilities --------------------------------------------------------- */

.center { text-align: center; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mb-0 { margin-bottom: 0; }
.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--color-accent);
  color: #fff;
  padding: 0.5rem 0.9rem;
  border-radius: 0 0 8px 0;
  z-index: 100;
}
.skip-link:focus { left: 0; }

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

@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; transition: none !important; }
}