/* =====================================================================
   XXC.dk — apps.xxc.dk
   Modern · flat · simple · responsive
   Palette mirrors the Liquid Drinking Planner app (Theme.swift)
   ===================================================================== */

:root {
  --accent:      #00B4D8;   /* aqua            */
  --accent-deep: #0077B6;   /* deep blue       */
  --accent-soft: #48CAE4;   /* light aqua      */
  --mint:        #06D6A0;   /* fresh green     */
  --amber:       #FFB703;
  --pink:        #EF476F;

  --ink:         #0d1b2a;   /* near-black text */
  --ink-soft:    #4a5a6a;   /* muted text      */
  --line:        #e6ecf1;   /* hairline border */
  --bg:          #ffffff;
  --bg-alt:      #f4f8fb;   /* section tint    */
  --card:        #ffffff;

  --radius:      18px;
  --radius-sm:   12px;
  --shadow:      0 10px 30px rgba(13, 27, 42, .06);
  --shadow-hover:0 18px 44px rgba(0, 119, 182, .16);
  --maxw:        1080px;
  --gap:         clamp(1rem, 3vw, 2rem);

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

@media (prefers-color-scheme: dark) {
  :root {
    --ink:      #eef4f8;
    --ink-soft: #9fb2c0;
    --line:     #1e2c39;
    --bg:       #0b1722;
    --bg-alt:   #0f1e2b;
    --card:     #122231;
    --shadow:   0 10px 30px rgba(0, 0, 0, .35);
    --shadow-hover: 0 18px 44px rgba(0, 180, 216, .22);
  }
}

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.65;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; display: block; }
a { color: var(--accent-deep); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3 { line-height: 1.2; letter-spacing: -0.02em; margin: 0 0 .5em; }
h1 { font-size: clamp(2rem, 5vw, 3.25rem); }
h2 { font-size: clamp(1.5rem, 3.5vw, 2.2rem); }
h3 { font-size: 1.2rem; }
p  { margin: 0 0 1rem; }
ul { margin: 0 0 1rem; padding-left: 1.25rem; }
li { margin: .35rem 0; }

.container { width: 100%; max-width: var(--maxw); margin-inline: auto; padding-inline: 1.25rem; }
.section { padding: clamp(3rem, 8vw, 6rem) 0; }
.section--alt { background: var(--bg-alt); }
.eyebrow {
  text-transform: uppercase; letter-spacing: .14em; font-size: .8rem;
  font-weight: 700; color: var(--accent); margin: 0 0 .5rem;
}
.muted { color: var(--ink-soft); }
.center { text-align: center; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: .5rem;
  padding: .8rem 1.4rem; border-radius: 999px;
  font-weight: 600; font-size: 1rem; cursor: pointer;
  border: 1px solid transparent; transition: transform .15s ease, box-shadow .2s ease, background .2s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-2px); }
.btn--primary {
  color: #fff;
  background: linear-gradient(135deg, var(--accent-soft), var(--accent) 55%, var(--accent-deep));
  box-shadow: var(--shadow);
}
.btn--primary:hover { box-shadow: var(--shadow-hover); }
.btn--ghost {
  color: var(--accent-deep); background: transparent; border-color: var(--line);
}
.btn--ghost:hover { border-color: var(--accent); }

/* ---------- header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 86%, transparent);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--line);
}
.nav { display: flex; align-items: center; justify-content: space-between; min-height: 64px; }
.brand { display: flex; align-items: center; gap: .6rem; font-weight: 800; color: var(--ink); letter-spacing: -.02em; }
.brand:hover { text-decoration: none; }
.brand img { width: 30px; height: 30px; border-radius: 8px; }
.brand b { color: var(--accent-deep); }
.nav-links { display: flex; align-items: center; gap: 1.6rem; list-style: none; margin: 0; padding: 0; }
.nav-links a { color: var(--ink-soft); font-weight: 600; font-size: .98rem; }
.nav-links a:hover, .nav-links a.is-active { color: var(--accent-deep); text-decoration: none; }

.nav-toggle {
  display: none; background: none; border: 0; cursor: pointer; padding: .4rem;
  width: 42px; height: 42px;
}
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after {
  content: ""; display: block; width: 24px; height: 2px; border-radius: 2px;
  background: var(--ink); transition: transform .25s ease, opacity .2s ease;
}
.nav-toggle span { position: relative; margin: 0 auto; }
.nav-toggle span::before { position: absolute; top: -7px; }
.nav-toggle span::after  { position: absolute; top:  7px; }
.nav-toggle[aria-expanded="true"] span { background: transparent; }
.nav-toggle[aria-expanded="true"] span::before { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span::after  { transform: translateY(-7px) rotate(-45deg); }

/* ---------- hero ---------- */
.hero { position: relative; overflow: hidden; }
.hero::before {
  content: ""; position: absolute; inset: 0; z-index: -1;
  background:
    radial-gradient(60% 60% at 85% 0%, rgba(0,180,216,.18), transparent 70%),
    radial-gradient(50% 50% at 0% 100%, rgba(6,214,160,.14), transparent 70%);
}
.hero-grid {
  display: grid; grid-template-columns: 1.1fr .9fr; gap: var(--gap);
  align-items: center; padding: clamp(3rem, 7vw, 5.5rem) 0;
}
.hero-copy .lead { font-size: 1.2rem; color: var(--ink-soft); max-width: 36ch; }
.hero-cta { display: flex; flex-wrap: wrap; gap: .8rem; margin-top: 1.5rem; }
.hero-art { display: flex; justify-content: center; }
.app-icon {
  width: min(280px, 70%); aspect-ratio: 1; border-radius: 26%;
  box-shadow: var(--shadow-hover);
  animation: float 6s ease-in-out infinite;
}
@keyframes float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-12px); } }
@media (prefers-reduced-motion: reduce) {
  .app-icon { animation: none; }
  html { scroll-behavior: auto; }
}

/* ---------- chips ---------- */
.chips { display: flex; flex-wrap: wrap; gap: .5rem; margin: 1.25rem 0 0; padding: 0; list-style: none; }
.chips li {
  font-size: .85rem; font-weight: 600; color: var(--accent-deep);
  background: color-mix(in srgb, var(--accent-soft) 22%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent);
  padding: .3rem .8rem; border-radius: 999px; margin: 0;
}

/* ---------- feature cards ---------- */
.grid { display: grid; gap: var(--gap); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.card {
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 1.6rem;
  box-shadow: var(--shadow); transition: transform .18s ease, box-shadow .2s ease;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.card .ico {
  width: 48px; height: 48px; border-radius: 14px; display: grid; place-items: center;
  font-size: 1.5rem; margin-bottom: .9rem;
  background: linear-gradient(135deg, var(--accent-soft), var(--accent-deep)); color: #fff;
}
.card h3 { margin-bottom: .35rem; }
.card p { color: var(--ink-soft); margin: 0; font-size: .97rem; }

/* ---------- showcase / screenshots ---------- */
.showcase {
  display: flex; justify-content: center; align-items: flex-end;
  gap: clamp(1.5rem, 5vw, 4rem); flex-wrap: wrap; margin-top: 2.75rem;
}
.shot { margin: 0; }
.shot--phone  { width: clamp(180px, 44vw, 250px); }
.shot--tablet { width: clamp(280px, 60vw, 440px); }
.device {
  --bezel: #11212e;
  display: block;
  padding: clamp(5px, 1vw, 10px);
  background: var(--bezel);
  border-radius: clamp(26px, 5vw, 48px);
  box-shadow: var(--shadow-hover);
}
.device img {
  display: block; width: 100%; height: auto;
  border-radius: clamp(20px, 4vw, 38px);
}
.device-caption {
  margin: .9rem 0 0; text-align: center; font-size: .9rem; font-weight: 600; color: var(--ink-soft);
}

/* ---------- developer / about ---------- */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--gap); align-items: center; }
.author-card { display: flex; gap: 1rem; align-items: center; }
.author-badge {
  width: 64px; height: 64px; flex: none; border-radius: 50%; display: grid; place-items: center;
  font-weight: 800; font-size: 1.4rem; color: #fff;
  background: linear-gradient(135deg, var(--accent), var(--accent-deep));
}

/* ---------- CTA band ---------- */
.cta-band {
  background: linear-gradient(135deg, var(--accent-deep), var(--accent));
  color: #fff; border-radius: var(--radius); padding: clamp(2rem, 5vw, 3rem); text-align: center;
}
.cta-band h2 { color: #fff; }
.cta-band p { color: rgba(255,255,255,.9); }
.cta-band .btn--primary { background: #fff; color: var(--accent-deep); }
.cta-band .btn--primary:hover { box-shadow: 0 18px 44px rgba(0,0,0,.25); }

/* ---------- article (privacy / support) ---------- */
.page-head { padding: clamp(2.5rem, 6vw, 4rem) 0 1rem; }
.article { max-width: 760px; }
.article h2 { margin-top: 2.2rem; }
.article h3 { margin-top: 1.6rem; }
.article p, .article li { color: var(--ink); }
.note {
  border-left: 4px solid var(--accent); background: var(--bg-alt);
  padding: 1rem 1.2rem; border-radius: var(--radius-sm); margin: 1.5rem 0;
}
.toc { list-style: none; padding: 0; display: flex; flex-wrap: wrap; gap: .5rem; }
.toc a {
  font-size: .9rem; font-weight: 600; padding: .35rem .9rem; border-radius: 999px;
  border: 1px solid var(--line); color: var(--ink-soft);
}
.toc a:hover { border-color: var(--accent); color: var(--accent-deep); text-decoration: none; }

/* contact list */
.contact-list { list-style: none; padding: 0; display: grid; gap: .75rem; }
.contact-list li {
  display: flex; align-items: center; gap: .8rem; margin: 0;
  background: var(--card); border: 1px solid var(--line);
  padding: 1rem 1.2rem; border-radius: var(--radius-sm);
}
.contact-list .ico {
  width: 40px; height: 40px; flex: none; border-radius: 10px; display: grid; place-items: center;
  background: linear-gradient(135deg, var(--accent-soft), var(--accent-deep)); color: #fff; font-size: 1.1rem;
}

/* FAQ */
.faq details {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-sm);
  padding: .25rem 1.2rem; margin-bottom: .75rem;
}
.faq summary {
  cursor: pointer; font-weight: 600; padding: .9rem 0; list-style: none;
  display: flex; justify-content: space-between; align-items: center; gap: 1rem;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--accent); font-size: 1.4rem; font-weight: 400; transition: transform .2s ease; }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details > p { padding-bottom: 1rem; margin: 0; color: var(--ink-soft); }

/* ---------- footer ---------- */
.site-footer { border-top: 1px solid var(--line); background: var(--bg-alt); padding: 2.5rem 0; }
.footer-grid { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 1.5rem; align-items: center; }
.footer-links { display: flex; gap: 1.4rem; list-style: none; margin: 0; padding: 0; flex-wrap: wrap; }
.footer-links a { color: var(--ink-soft); font-weight: 600; font-size: .95rem; }
.footer-links a:hover { color: var(--accent-deep); }
.site-footer small { color: var(--ink-soft); }

/* ---------- responsive ---------- */
@media (max-width: 860px) {
  .hero-grid, .about-grid { grid-template-columns: 1fr; }
  .hero-art { order: -1; }
  .app-icon { width: min(200px, 55%); }
  .grid--3 { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .nav-toggle { display: block; }
  .nav-links {
    position: absolute; top: 64px; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--bg); border-bottom: 1px solid var(--line);
    padding: .5rem 1.25rem 1rem; box-shadow: var(--shadow);
    display: none;
  }
  .nav-links.is-open { display: flex; }
  .nav-links li { padding: .25rem 0; }
  .nav-links a { display: block; padding: .6rem 0; font-size: 1.05rem; }
  .grid--3, .grid--2 { grid-template-columns: 1fr; }
}