:root {
  --bg: #f2f6f3;
  --surface: #ffffff;
  --ink: #0f241a;
  --muted: #4d6357;
  --line: #d3e0d8;
  --green: #17935b;
  --green-deep: #0f623d;
  --green-soft: #e3f3ea;
  --amber: #c77a12;
  --amber-soft: #fbf0dd;
  --on-green: #ffffff;
  --shadow: 0 1px 0 var(--line), 0 18px 40px -28px rgba(15, 36, 26, 0.45);
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0d1813; --surface: #13231b; --ink: #e4eee8; --muted: #9db3a6; --line: #24392e;
    --green: #2bb673; --green-deep: #7fd8a9; --green-soft: #153826; --amber: #f0a43a; --amber-soft: #3a2a10;
    --on-green: #06140d; --shadow: 0 1px 0 var(--line), 0 18px 40px -28px rgba(0, 0, 0, 0.8);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0d1813; --surface: #13231b; --ink: #e4eee8; --muted: #9db3a6; --line: #24392e;
  --green: #2bb673; --green-deep: #7fd8a9; --green-soft: #153826; --amber: #f0a43a; --amber-soft: #3a2a10;
  --on-green: #06140d; --shadow: 0 1px 0 var(--line), 0 18px 40px -28px rgba(0, 0, 0, 0.8);
  color-scheme: dark;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "IBM Plex Sans Arabic", "Segoe UI", Tahoma, system-ui, sans-serif;
  font-size: 1.0625rem;
  line-height: 1.7;
  padding-top: env(safe-area-inset-top, 0px);
  padding-bottom: env(safe-area-inset-bottom, 0px);
}
h1, h2, h3 { line-height: 1.25; margin: 0; text-wrap: balance; }
p { margin: 0; }
a { color: var(--green-deep); }
svg { display: block; }
.wrap {
  max-width: 72rem;
  margin-inline: auto;
  padding-left: max(20px, env(safe-area-inset-left, 0px));
  padding-right: max(20px, env(safe-area-inset-right, 0px));
}
.skip { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
.skip:focus { width: auto; height: auto; clip-path: none; inset-inline-start: 1rem; top: 1rem; background: var(--surface); padding: .5rem 1rem; z-index: 10; }
:focus-visible { outline: 3px solid var(--green); outline-offset: 3px; border-radius: 6px; }

/* Header */
.top { border-bottom: 1px solid var(--line); }
.top-row { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding-block: .9rem; }
.brand { display: flex; align-items: center; gap: .6rem; color: var(--ink); text-decoration: none; font-weight: 700; font-size: 1.15rem; }
.logo { width: 2.1rem; height: 2.1rem; fill: var(--green); }
.logo .node-lines { stroke: var(--green); stroke-width: 13; stroke-linecap: round; fill: none; }
.top-actions { display: flex; align-items: center; gap: .5rem; }
.lang {
  font: inherit; font-weight: 500; font-size: .95rem; color: var(--ink); background: transparent;
  border: 1px solid var(--line); border-radius: 999px; padding: .3rem .8rem; cursor: pointer;
}
.lang:hover { border-color: var(--green); }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
  font: inherit; font-weight: 500; text-decoration: none; border-radius: 10px;
  padding: .7rem 1.3rem; border: 1px solid transparent; cursor: pointer; white-space: nowrap;
}
.btn-main { background: var(--green); color: var(--on-green); }
.btn-main:hover { background: var(--green-deep); color: var(--bg); }
.btn-line { border-color: var(--line); color: var(--ink); background: var(--surface); }
.btn-line:hover { border-color: var(--green); }
.btn-quiet { color: var(--green-deep); padding-inline: .6rem; }
.btn-quiet:hover { text-decoration: underline; }
.btn-small { padding: .45rem .9rem; font-size: .95rem; }
.btn svg { width: 1.2rem; height: 1.2rem; fill: none; stroke: currentColor; stroke-width: 2; stroke-linejoin: round; }

/* Hero */
.hero { padding-block: clamp(2.5rem, 7vw, 5.5rem) clamp(2.5rem, 6vw, 4.5rem); }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr); gap: clamp(2rem, 5vw, 4.5rem); align-items: center; }
.hero h1 { font-size: clamp(2rem, 4.6vw, 3.4rem); font-weight: 700; letter-spacing: -0.01em; max-width: 16ch; }
:root[lang="en"] .hero h1 { max-width: 18ch; letter-spacing: -0.02em; }
.lead { margin-top: 1.2rem; color: var(--muted); font-size: 1.15rem; max-width: 34rem; }
.cta { display: flex; flex-wrap: wrap; gap: .75rem; margin-top: 2rem; }

/* Live panel: the one memorable element */
.panel {
  margin: 0; background: var(--surface); border: 1px solid var(--line); border-radius: 18px;
  box-shadow: var(--shadow); padding: 1.1rem 1.2rem 1.2rem; position: relative;
}
.panel-head { display: flex; justify-content: space-between; align-items: center; gap: 1rem; font-size: .9rem; color: var(--muted); padding-bottom: .7rem; border-bottom: 1px solid var(--line); }
.live { display: inline-flex; align-items: center; gap: .45rem; color: var(--green-deep); font-weight: 500; }
.dot { width: .55rem; height: .55rem; border-radius: 50%; background: var(--green); box-shadow: 0 0 0 0 var(--green); animation: beat 2.4s ease-out infinite; }
@keyframes beat { 0% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--green) 60%, transparent); } 70%, 100% { box-shadow: 0 0 0 .55rem transparent; } }
.readings { list-style: none; margin: 0; padding: 0; }
.readings li {
  display: grid; grid-template-columns: minmax(0, 1fr) auto; grid-template-areas: "name value" "age value";
  column-gap: 1rem; padding-block: .75rem; border-bottom: 1px solid var(--line);
  transition: background-color .4s ease;
}
.readings li:last-child { border-bottom: 0; }
.r-name { grid-area: name; font-weight: 500; }
.r-age { grid-area: age; font-size: .85rem; color: var(--muted); }
.r-value { grid-area: value; align-self: center; font-variant-numeric: tabular-nums; direction: ltr; }
.r-value b { font-size: 1.7rem; font-weight: 700; }
.r-value small { font-size: .95rem; color: var(--muted); margin-inline-start: .15rem; }
.r-state { font-weight: 700; color: var(--green-deep); direction: inherit; }
.readings li.warn { background: var(--amber-soft); margin-inline: -1.2rem; padding-inline: 1.2rem; }
.readings li.warn .r-value b { color: var(--amber); }
.readings li.tick .r-value b { animation: tick .6s ease; }
@keyframes tick { from { opacity: .35; } to { opacity: 1; } }
.alert {
  display: flex; gap: .6rem; align-items: flex-start; margin-top: .9rem;
  background: var(--amber-soft); color: var(--ink); border-inline-start: 4px solid var(--amber);
  border-radius: 10px; padding: .7rem .9rem; font-size: .95rem; animation: rise .35s ease;
}
.alert.ok { background: var(--green-soft); border-inline-start-color: var(--green); }
.alert svg { width: 1.2rem; height: 1.2rem; flex: none; margin-top: .2rem; fill: none; stroke: var(--amber); stroke-width: 2; stroke-linejoin: round; stroke-linecap: round; }
.alert.ok svg { stroke: var(--green); }
@keyframes rise { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }

/* Sections */
section h2 { font-size: clamp(1.5rem, 2.8vw, 2.1rem); font-weight: 700; }
.how, .features, .sectors, .contact { padding-block: clamp(2.5rem, 6vw, 4.5rem); border-top: 1px solid var(--line); }

/* Steps: a real sequence, so numbered */
.steps { list-style: none; counter-reset: step; margin: 2rem 0 0; padding: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 2rem; }
.steps li { counter-increment: step; position: relative; padding-top: 3.2rem; }
.steps li::before {
  content: counter(step); position: absolute; top: 0; inset-inline-start: 0;
  width: 2.2rem; height: 2.2rem; border-radius: 50%; display: grid; place-items: center;
  background: var(--green-soft); color: var(--green-deep); font-weight: 700;
}
.steps li:not(:last-child)::after {
  content: ""; position: absolute; top: 1.1rem; inset-inline-start: 3rem; inset-inline-end: -1.2rem;
  border-top: 2px dashed var(--line);
}
.steps h3 { font-size: 1.2rem; }
.steps p { margin-top: .4rem; color: var(--muted); }

/* Features */
.showcase { display: grid; gap: clamp(2.5rem, 5vw, 4rem); margin-top: 2.2rem; }
.show { display: grid; grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr); gap: clamp(1.5rem, 4vw, 3.5rem); align-items: center; }
.show:nth-child(2) .show-text { order: 2; }
.show h3 { font-size: 1.45rem; }
.show p { margin-top: .6rem; color: var(--muted); max-width: 32rem; }
.mock { background: var(--surface); border: 1px solid var(--line); border-radius: 14px; box-shadow: var(--shadow); padding: 1rem; }
.mock-bar { display: flex; gap: .35rem; padding-bottom: .8rem; }
.mock-bar span { width: .55rem; height: .55rem; border-radius: 50%; background: var(--line); }
.mock-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: .6rem; }
.tile { border: 1px solid var(--line); border-radius: 10px; padding: .6rem .75rem; display: flex; flex-direction: column; gap: .1rem; }
.tile small { color: var(--muted); font-size: .8rem; }
.tile b { font-size: 1.35rem; font-variant-numeric: tabular-nums; }
.tile b i { font-style: normal; font-size: .85rem; color: var(--muted); font-weight: 500; margin-inline-start: .1rem; }
.tile-ok b { color: var(--green-deep); font-size: 1.1rem; }
.tile-chart { grid-column: 1 / -1; }
.tile-chart svg { width: 100%; height: 6rem; margin-top: .3rem; }
.tile-chart .band { fill: var(--green-soft); }
.tile-chart .line { fill: none; stroke: var(--green); stroke-width: 2.4; vector-effect: non-scaling-stroke; stroke-linejoin: round; }
.mock-plan svg { width: 100%; height: auto; }
.mock-plan .room { fill: var(--bg); stroke: var(--muted); stroke-width: 2; }
.mock-plan .doorgap { stroke: var(--surface); stroke-width: 4; }
.mock-plan .pin circle { stroke: var(--surface); stroke-width: 3; }
.mock-plan .pin-ok circle { fill: var(--green); }
.mock-plan .pin-warn circle { fill: var(--amber); }
.mock-plan text { font: 700 13px "IBM Plex Sans Arabic", system-ui, sans-serif; fill: var(--ink); direction: ltr; }

.more { list-style: none; margin: clamp(2.5rem, 5vw, 3.5rem) 0 0; padding: 2rem 0 0; border-top: 1px solid var(--line); display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.8rem 3rem; }
.more li { display: flex; gap: 1rem; align-items: flex-start; }
.more svg { width: 1.6rem; height: 1.6rem; flex: none; margin-top: .2rem; fill: none; stroke: var(--green); stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.more h3 { font-size: 1.1rem; }
.more p { margin-top: .25rem; color: var(--muted); }

/* Sectors */
.sector-list { list-style: none; margin: 1.5rem 0 0; padding: 0; display: flex; flex-wrap: wrap; gap: .7rem; }
.sector-list li { border: 1px solid var(--line); border-radius: 999px; padding: .5rem 1.1rem; background: var(--surface); }

/* Contact */
.contact { background: var(--green-soft); }
.contact-grid { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 2rem; }
.contact p { margin-top: .5rem; color: var(--muted); max-width: 30rem; }
.contact-actions { display: flex; flex-direction: column; gap: .9rem; align-items: stretch; min-width: 0; }
.email { display: flex; flex-wrap: wrap; align-items: center; gap: .6rem; }
.email-addr { font-weight: 500; user-select: all; overflow-wrap: anywhere; }

/* Footer */
.foot { border-top: 1px solid var(--line); color: var(--muted); font-size: .95rem; }
.foot-row { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 1rem; padding-block: 1.5rem; }

/* Narrow screens */
@media (max-width: 860px) {
  .hero-grid, .show { grid-template-columns: minmax(0, 1fr); }
  .show:nth-child(2) .show-text { order: 0; }
  .steps { grid-template-columns: minmax(0, 1fr); gap: 1.6rem; }
  .steps li { padding-top: 0; padding-inline-start: 3.2rem; }
  .steps li:not(:last-child)::after { display: none; }
  .more { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 420px) {
  .brand-name { font-size: 1rem; }
  .mock-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .cta .btn { flex: 1 1 auto; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}