@font-face {
  font-family: "DM Sans";
  font-style: normal;
  font-weight: 100 1000;
  font-display: swap;
  src: url("fonts/dm-sans-latin-wght-normal.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329,
    U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: "DM Sans";
  font-style: normal;
  font-weight: 100 1000;
  font-display: swap;
  src: url("fonts/dm-sans-latin-ext-wght-normal.woff2") format("woff2");
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329,
    U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}

:root {
  --bg: #f4f4f4;
  --card: #ffffff;
  --text: #21262b;
  --label: #5b636b;
  --line: #e2e4e6;
  --accent: #22b573;
  --accent-text: #13804f;
  --on-accent: #ffffff;
  --code-bg: #21262b;
  --code-text: #eef1f3;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #21262b;
    --card: #2c3136;
    --text: #f2f4f5;
    --label: #a9b0b6;
    --line: #3b4147;
    --accent-text: #4fd18f;
    --code-bg: #171a1d;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 "DM Sans", system-ui, -apple-system, sans-serif;
  -webkit-text-size-adjust: 100%;
}
a { color: var(--accent-text); }
a:focus-visible, .btn:focus-visible { outline: 2px solid var(--accent-text); outline-offset: 3px; }
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 16px; }
section.wrap { padding-top: 56px; scroll-margin-top: 64px; }
h1 { font-size: clamp(34px, 6vw, 56px); line-height: 1.08; margin: 8px 0 18px; letter-spacing: -0.02em; }
h2 { font-size: clamp(24px, 3.4vw, 32px); margin: 0 0 18px; letter-spacing: -0.01em; }
h3 { font-size: 18px; margin: 0 0 6px; }
p { margin: 0 0 12px; }
.small { font-size: 14px; color: var(--label); }

/* header */
.top { position: sticky; top: 0; z-index: 5; background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.top-inner { display: flex; align-items: center; justify-content: space-between; gap: 12px; min-height: 60px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; color: var(--text); text-decoration: none; }
.brand img { border-radius: 8px; }
nav { display: flex; gap: 4px 18px; flex-wrap: wrap; justify-content: flex-end; }
nav a { color: var(--text); text-decoration: none; font-size: 15px; padding: 10px 0; }
nav a:hover { color: var(--accent-text); }
@media (max-width: 620px) { nav a[href="./#funktionen"], nav a[href="./#installation"] { display: none; } }
/* language switch (#104): a small segmented control at the end of the nav; the ::after enlarges the touch target */
.lang-switch { display: flex; align-self: center; gap: 2px; padding: 3px; border: 1px solid var(--line);
  border-radius: 999px; background: var(--card); }
nav .lang-switch a { position: relative; padding: 2px 8px; border-radius: 999px; font-size: 13px; font-weight: 600;
  line-height: 1.5; letter-spacing: 0.03em; color: var(--label); }
nav .lang-switch a::after { content: ""; position: absolute; inset: -9px -1px; }
nav .lang-switch a:hover { color: var(--text); }
nav .lang-switch a[aria-current] { background: var(--text); color: var(--bg); }
/* the header stays one row with the switch: the least needed links go first (GitHub and the demo are also linked
   from the page itself) */
@media (max-width: 700px) { nav > a[href="https://github.com/Gr33ndev/OpenAmpere"], nav > a[href="changelog.html"] { display: none; } }
@media (max-width: 420px) { nav > a[href*="demo/"] { display: none; } }

/* hero */
.hero { padding: 48px 0 8px; }
.hero-inner { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 40px; align-items: center; }
.eyebrow { color: var(--accent-text); font-weight: 600; font-size: 14px; margin: 0; }
.lead { font-size: 19px; color: var(--label); max-width: 34em; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 22px 0 12px; }
.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 0 22px;
  border-radius: 999px; font-weight: 600; text-decoration: none; }
.btn.primary { background: var(--text); color: var(--bg); }
.btn.secondary { background: var(--card); color: var(--text); border: 1px solid var(--line); }
.btn:hover { filter: brightness(1.08); }
/* the demo is a 390 × 800 px phone, scaled to fill the frame exactly: scale = (frame width - 2 × 10 px) / 390 */
.phone { --s: 0.71795; justify-self: center; width: calc(390px * var(--s) + 20px); height: calc(800px * var(--s) + 20px);
  border-radius: 44px; padding: 10px; background: #111417; overflow: hidden;
  box-shadow: 0 30px 60px rgba(0, 0, 0, 0.18), inset 0 0 0 2px #2a2f34; }
.phone iframe { display: block; width: 390px; height: 800px; border: 0; border-radius: calc(34px / var(--s));
  background: var(--bg); transform: scale(var(--s)); transform-origin: 0 0; }
/* smaller laptops: a smaller phone instead of one that crowds the text */
@media (max-width: 1100px), (max-height: 760px) {
  .phone { --s: 0.61538; }
}
@media (max-width: 860px) {
  .hero-inner { grid-template-columns: 1fr; }
  .phone { display: none; }
}

/* cards */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.cards.two { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 860px) { .cards { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .cards, .cards.two { grid-template-columns: 1fr; } }
.card { background: var(--card); border-radius: 24px; padding: 22px; border: 1px solid var(--line); }
.card p { color: var(--label); margin: 0 0 8px; }
.card p:last-child { margin-bottom: 0; }
.card ul { margin: 6px 0 10px; padding-left: 20px; }
.card li { margin: 4px 0; }

/* diagram */
.diagram { width: 100%; height: auto; max-width: 860px; display: block; margin: 0 auto; font-family: inherit; }
.diagram .node rect { fill: var(--card); stroke: var(--line); stroke-width: 1.5; }
.diagram .node.accent rect { stroke: var(--accent); stroke-width: 2.5; }
.diagram text { fill: var(--text); font-size: 17px; font-weight: 600; text-anchor: middle; }
.diagram text.sub { fill: var(--label); font-size: 13px; font-weight: 400; }
.diagram .link line { stroke: var(--accent); stroke-width: 3; stroke-dasharray: 6 6; }
.diagram .link text { fill: var(--label); font-size: 12px; font-weight: 500; }
.diagram text.note { fill: var(--label); font-size: 14px; font-weight: 400; }

/* install */
.steps { counter-reset: step; list-style: none; padding: 0; margin: 0 0 16px; display: grid; grid-template-columns: minmax(0, 1fr); gap: 16px; }
.steps li { counter-increment: step; position: relative; background: var(--card); border: 1px solid var(--line);
  border-radius: 24px; padding: 22px 22px 22px 74px; min-width: 0; }
@media (max-width: 600px) { .steps li { padding: 70px 18px 20px; } .steps li::before { left: 18px; top: 20px; } }
.steps li::before { content: counter(step); position: absolute; left: 22px; top: 20px; width: 36px; height: 36px;
  border-radius: 50%; background: var(--accent); color: var(--on-accent); font-weight: 700; display: grid; place-items: center; }
.steps p { color: var(--label); margin: 0; }
pre { margin: 8px 0 0; padding: 14px 16px; border-radius: 14px; background: var(--code-bg); color: var(--code-text);
  overflow-x: auto; font-size: 14px; line-height: 1.5; }
code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }

/* legal + footer */
.legal p { color: var(--label); max-width: 52em; }
.legal strong { color: var(--text); }
footer { margin-top: 64px; padding: 28px 0 40px; border-top: 1px solid var(--line); }
footer { text-align: center; }
footer p { margin: 0 auto 8px; max-width: 60em; }

/* imprint */
.legal-page { padding-top: 40px; max-width: 760px; }
.legal-page section { margin-bottom: 40px; }
.legal-page h1 { font-size: clamp(30px, 5vw, 42px); }
.legal-page h3 { margin-top: 22px; }
.legal-page p { color: var(--label); }
.address { color: var(--text) !important; font-size: 18px; line-height: 1.7; }

/* install command with copy button */
.command { margin: 8px 0 12px; }
.command pre { margin: 0; }
.command .copy { margin-top: 8px; min-height: 40px; padding: 0 16px; border-radius: 999px; border: 1px solid var(--line);
  background: var(--card); color: var(--text); font: inherit; font-weight: 600; cursor: pointer; }
.command .copy:focus-visible { outline: 2px solid var(--accent-text); outline-offset: 3px; }

/* Home Assistant (#76): the official badges, loaded from my.home-assistant.io like in the README */
.notice { background: var(--card); border: 1px solid var(--line); border-left: 4px solid var(--accent); border-radius: 12px;
  padding: 14px 16px; }
.ha-badge { display: inline-block; line-height: 0; }
.ha-badge img { height: 44px; width: auto; max-width: 100%; }

/* FAQ */
.faq-page { max-width: 820px; }
.faq-head { padding: 40px 0 8px; }
.faq-head .lead { margin-bottom: 18px; }
.topics { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 8px; padding: 0; list-style: none; }
.topics a { display: inline-flex; align-items: center; min-height: 40px; padding: 0 16px; border-radius: 999px;
  background: var(--card); border: 1px solid var(--line); color: var(--text); text-decoration: none; font-size: 15px; font-weight: 500; }
.topics a:hover { border-color: var(--accent); }
.faq-page section { padding-top: 40px; scroll-margin-top: 72px; }
.faq-page section > p { color: var(--label); }
.faq-list { display: grid; gap: 10px; }
.faq { background: var(--card); border: 1px solid var(--line); border-radius: 18px; }
.faq summary { list-style: none; cursor: pointer; display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 16px 20px; font-weight: 600; font-size: 17px; line-height: 1.4; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: ""; flex: none; width: 10px; height: 10px; margin-right: 4px; border: solid var(--label);
  border-width: 0 2px 2px 0; transform: translateY(-3px) rotate(45deg); transition: transform 0.15s; }
.faq[open] summary::after { transform: translateY(2px) rotate(-135deg); }
.faq summary:focus-visible { outline: 2px solid var(--accent-text); outline-offset: -2px; border-radius: 18px; }
.faq .answer { padding: 0 20px 18px; color: var(--label); }
.faq .answer p:last-child, .faq .answer ul:last-child { margin-bottom: 0; }
.faq .answer ul { margin: 0 0 12px; padding-left: 20px; }
.faq .answer li { margin: 6px 0; }
.faq .answer strong { color: var(--text); }
.faq-page .notice { margin: 0 0 16px; color: var(--label); }
.faq-page .notice strong { color: var(--text); }
@media (prefers-reduced-motion: reduce) { .faq summary::after { transition: none; } }

/* changelog (#155) */
.changelog-page { max-width: 820px; }
.release { padding: 28px 0 8px; border-top: 1px solid var(--line); scroll-margin-top: 72px; }
.faq-head + .release { border-top: 0; }
.release h2 { margin: 0; font-size: clamp(22px, 3vw, 28px); }
.release .date { margin: 4px 0 0; color: var(--label); font-size: 14px; }
.release .summary { margin-top: 12px; }
.release .summary p { margin: 0 0 8px; }
.release h3 { margin: 18px 0 6px; font-size: 17px; }
.release ul { margin: 0; padding-left: 20px; overflow-wrap: anywhere; }
.release li { margin: 4px 0; }