/* ozero_hdpe — стилі сайту. Без зовнішніх шрифтів і бібліотек. */
:root {
  --ink: #142a33; --ink-2: #3e5560; --muted: #6b7f88; --line: #d9e3e7;
  --bg: #f6f9fa; --card: #ffffff; --teal: #0f5c6e; --teal-2: #157a90; --aqua: #2bb3c0; --aqua-soft: #e3f4f6;
  --sand: #e8dcc3; --sand-soft: #f7f1e4; --warn: #b8431f; --warn-soft: #fbeae3; --ok: #2f7d4e; --ok-soft: #e6f3ea;
  --norm: #5a4d9c; --norm-soft: #ece8f8;
  --r: 14px; --sh: 0 6px 24px rgba(20, 42, 51, .08);
  font-size: 17px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; font-family: "Segoe UI", system-ui, -apple-system, Roboto, "Helvetica Neue", Arial, sans-serif; color: var(--ink); background: var(--bg); line-height: 1.6; }
img, svg { max-width: 100%; }
a { color: var(--teal-2); }
h1, h2, h3, h4 { line-height: 1.2; color: var(--ink); margin: 1.6em 0 .5em; font-weight: 700; letter-spacing: -.01em; }
h1 { font-size: clamp(1.9rem, 4vw, 2.7rem); margin-top: 0; }
h2 { font-size: clamp(1.4rem, 2.6vw, 1.85rem); }
h3 { font-size: 1.15rem; }
p { margin: .7em 0; }
.wrap { width: min(1140px, 100% - 32px); margin-inline: auto; }
main.wide .wrap { width: min(1320px, 100% - 32px); }
.muted { color: var(--muted); }
.small { font-size: .9rem; }
.skip { position: absolute; left: -999px; top: 0; background: #fff; padding: 8px; }
.skip:focus { left: 8px; z-index: 99; }
code { background: var(--aqua-soft); padding: .05em .35em; border-radius: 6px; font-size: .92em; }

/* шапка */
.hdr { position: sticky; top: 0; z-index: 50; background: rgba(255,255,255,.92); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.hdr-in { display: flex; align-items: center; gap: 18px; min-height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 1.15rem; color: var(--teal); text-decoration: none; }
.logo { width: 30px; height: 30px; border-radius: 50%; background: radial-gradient(circle at 30% 30%, #4ccbd6, var(--teal) 70%); box-shadow: inset 0 -6px 10px rgba(0,0,0,.18); }
.nav { margin-left: auto; display: flex; gap: 4px; flex-wrap: wrap; }
.nav a { padding: 8px 12px; border-radius: 10px; color: var(--ink-2); text-decoration: none; font-weight: 600; font-size: .95rem; }
.nav a:hover, .nav a.active { background: var(--aqua-soft); color: var(--teal); }
.nav a.nav-cta { background: var(--teal); color: #fff; }
.nav a.nav-cta:hover { background: var(--teal-2); }
.burger { display: none; margin-left: auto; width: 44px; height: 44px; border: 1px solid var(--line); border-radius: 10px; background: #fff; position: relative; }
.burger span, .burger span::before, .burger span::after { content: ""; position: absolute; left: 11px; width: 22px; height: 2px; background: var(--ink); transition: .2s; }
.burger span { top: 21px; } .burger span::before { top: -7px; left: 0; } .burger span::after { top: 7px; left: 0; }
@media (max-width: 1024px) {
  .burger { display: block; }
  .nav { display: none; position: absolute; left: 0; right: 0; top: 64px; background: #fff; border-bottom: 1px solid var(--line); padding: 10px 16px 16px; flex-direction: column; }
  body.nav-open .nav { display: flex; }
  .nav a { padding: 12px 10px; font-size: 1.05rem; }
}

/* герой */
.hero { background: linear-gradient(160deg, #0b3f4d 0%, var(--teal) 55%, #1d8aa0 100%); color: #fff; padding: 56px 0 48px; position: relative; overflow: hidden; }
.hero::after { content: ""; position: absolute; inset: auto -10% -40% -10%; height: 60%; background: radial-gradient(ellipse at center, rgba(255,255,255,.14), transparent 60%); pointer-events: none; }
.hero h1 { color: #fff; max-width: 14em; }
.hero p.lead { font-size: 1.15rem; max-width: 36em; color: #eaf7f9; }
.hero .btn.ghost { color: #fff; border-color: rgba(255,255,255,.6); }
.hero-grid { display: grid; grid-template-columns: 1.3fr 1fr; gap: 32px; align-items: center; }
.hero-art { aspect-ratio: 4/3; position: relative; }
@media (max-width: 860px) { .hero-grid { grid-template-columns: 1fr; } .hero-art { max-width: 420px; } }
.facts { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 12px; margin-top: 28px; }
.fact { background: rgba(255,255,255,.12); border: 1px solid rgba(255,255,255,.22); border-radius: 12px; padding: 12px 14px; }
.fact b { display: block; font-size: 1.35rem; }
.fact span { font-size: .9rem; opacity: .9; }

/* кнопки */
.btn { display: inline-block; padding: 12px 22px; border-radius: 12px; background: var(--aqua); color: #06303a; font-weight: 700; text-decoration: none; border: 2px solid transparent; cursor: pointer; font-size: 1rem; line-height: 1.2; }
.btn:hover { background: #45c5d0; }
.btn.ghost { background: transparent; color: var(--teal); border-color: var(--teal); }
.btn.ghost:hover { background: var(--aqua-soft); }
.btn.primary { background: var(--teal); color: #fff; }
.btn.primary:hover { background: var(--teal-2); }
.btn[disabled] { opacity: .55; cursor: wait; }
.btn.sm { padding: 8px 14px; font-size: .92rem; border-radius: 10px; }

/* секції й картки */
section.sec { padding: 48px 0; }
section.sec.alt { background: #fff; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.sec-h { max-width: 44em; margin-bottom: 20px; }
.sec-h h2 { margin-top: 0; }
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 16px; }
.card { display: block; background: var(--card); border: 1px solid var(--line); border-radius: var(--r); padding: 20px; text-decoration: none; color: var(--ink); box-shadow: var(--sh); transition: transform .15s, border-color .15s; }
.card:hover { transform: translateY(-2px); border-color: var(--aqua); }
.card h3 { margin: 0 0 .4em; color: var(--teal); }
.card p { margin: 0 0 .8em; color: var(--ink-2); font-size: .97rem; }
.card .more { color: var(--teal-2); font-weight: 700; }
.steps { counter-reset: s; display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; }
.step { background: var(--card); border: 1px solid var(--line); border-radius: var(--r); padding: 18px 18px 18px 64px; position: relative; }
.step::before { counter-increment: s; content: counter(s); position: absolute; left: 16px; top: 16px; width: 34px; height: 34px; border-radius: 50%; background: var(--teal); color: #fff; font-weight: 800; display: grid; place-items: center; }
.step h3 { margin: 0 0 .3em; font-size: 1.05rem; }
.step p { margin: 0; font-size: .95rem; color: var(--ink-2); }
.two { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; align-items: start; }
@media (max-width: 860px) { .two { grid-template-columns: 1fr; } }
.cta-band { background: var(--sand-soft); border-top: 1px solid var(--sand); padding: 40px 0; margin-top: 40px; }
.cta-band h2 { margin-top: 0; }

/* стаття */
.article { padding: 36px 0 10px; }
.crumbs { font-size: .9rem; color: var(--muted); margin: 0 0 8px; }
.lead { font-size: 1.15rem; color: var(--ink-2); max-width: 40em; }
.art-grid { display: grid; grid-template-columns: 260px 1fr; gap: 36px; margin-top: 24px; }
@media (max-width: 960px) { .art-grid { grid-template-columns: 1fr; } .toc { position: static !important; } }
.toc { position: sticky; top: 84px; align-self: start; background: #fff; border: 1px solid var(--line); border-radius: var(--r); padding: 14px 16px; font-size: .92rem; }
.toc ol { margin: 8px 0 0; padding-left: 20px; } .toc li { margin: 4px 0; } .toc a { color: var(--ink-2); text-decoration: none; } .toc a:hover { color: var(--teal); }
.art-body { max-width: 760px; min-width: 0; }
.art-body h2 { padding-top: .3em; border-top: 1px solid var(--line); margin-top: 1.8em; }
.art-body h2:first-child { border-top: 0; margin-top: 0; }
.art-body ul, .art-body ol { padding-left: 1.3em; } .art-body li { margin: .3em 0; }
.tbl { overflow-x: auto; margin: 1em 0; border: 1px solid var(--line); border-radius: 12px; background: #fff; }
table { border-collapse: collapse; width: 100%; font-size: .95rem; }
th, td { padding: 9px 12px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
th { background: var(--aqua-soft); color: var(--teal); font-weight: 700; }
tr:last-child td { border-bottom: 0; }
.callout { border-left: 4px solid var(--aqua); background: var(--aqua-soft); padding: 10px 16px; border-radius: 0 12px 12px 0; margin: 1em 0; }
.callout p { margin: 0; }
.callout.warn { border-color: var(--warn); background: var(--warn-soft); }
.callout.tip { border-color: var(--ok); background: var(--ok-soft); }
.callout.norm { border-color: var(--norm); background: var(--norm-soft); }
.callout.warn p::before { content: "⚠ "; } .callout.tip p::before { content: "💡 "; } .callout.norm p::before { content: "📏 "; }

/* форми */
.form { display: grid; gap: 14px; }
.field { display: grid; gap: 6px; }
.field label, .field > span.lbl { font-weight: 600; font-size: .95rem; }
.field .hint { font-size: .85rem; color: var(--muted); }
input[type=text], input[type=tel], input[type=email], input[type=number], select, textarea { width: 100%; padding: 10px 12px; border: 1px solid #b9c9d0; border-radius: 10px; font: inherit; background: #fff; color: var(--ink); }
input:focus, select:focus, textarea:focus { outline: 2px solid var(--aqua); outline-offset: 1px; border-color: var(--aqua); }
.row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
@media (max-width: 600px) { .row { grid-template-columns: 1fr; } }
.ok-msg { background: var(--ok-soft); border: 1px solid #b7dcc4; padding: 14px 16px; border-radius: 12px; }
.err-msg { background: var(--warn-soft); border: 1px solid #efc2b3; padding: 12px 16px; border-radius: 12px; color: var(--warn); }

/* панелі (форма заявки) */
.panel { background: #fff; border: 1px solid var(--line); border-radius: var(--r); box-shadow: var(--sh); }
.panel .ph { padding: 14px 18px; border-bottom: 1px solid var(--line); font-weight: 800; display: flex; justify-content: space-between; align-items: center; gap: 10px; }
.panel .pb { padding: 16px 18px; }
.spin { display: inline-block; width: 16px; height: 16px; border: 2px solid var(--aqua-soft); border-top-color: var(--teal); border-radius: 50%; animation: sp .8s linear infinite; vertical-align: -3px; }
@keyframes sp { to { transform: rotate(360deg); } }

/* підвал */
.ftr { border-top: 1px solid var(--line); background: #fff; margin-top: 40px; padding: 28px 0; font-size: .95rem; }
.ftr-in { display: grid; grid-template-columns: 1.3fr 1fr 1fr; gap: 20px; }
@media (max-width: 860px) { .ftr-in { grid-template-columns: 1fr; } }

.nav a.nav-ctor { background: var(--aqua-soft); color: var(--teal); }
.ftr-nav { display: flex; flex-direction: column; gap: 4px; }
.ftr-nav a { text-decoration: none; }
.ftr-nav a:hover { text-decoration: underline; }

/* підбирач водойми в герої */
.hero-ticks { list-style: none; padding: 0; margin: 18px 0 0; display: grid; gap: 6px; color: #eaf7f9; }
.hero-ticks li::before { content: "✓"; color: #7fe3ec; font-weight: 800; margin-right: 8px; }
.picker { background: #fff; color: var(--ink); border-radius: 18px; padding: 18px; box-shadow: 0 20px 50px rgba(0, 0, 0, .25); position: relative; z-index: 1; }
.pk-step { display: flex; align-items: baseline; gap: 8px; margin: 4px 0 10px; flex-wrap: wrap; }
.pk-step b { font-size: 1.05rem; }
.pk-n { width: 24px; height: 24px; border-radius: 50%; background: var(--teal); color: #fff; display: inline-grid; place-items: center; font-size: .85rem; font-weight: 800; flex: none; align-self: center; }
.pk-types { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-bottom: 14px; }
.pk-types button, .pk-sizes button { font: inherit; text-align: left; border: 1.5px solid var(--line); background: var(--bg); border-radius: 12px; padding: 9px 10px; cursor: pointer; color: var(--ink); display: flex; flex-direction: column; gap: 2px; min-height: 44px; }
.pk-types button i { font-style: normal; font-size: 1.3rem; line-height: 1; }
.pk-types button b, .pk-sizes button b { font-size: .95rem; }
.pk-types button span, .pk-sizes button span { font-size: .78rem; color: var(--muted); line-height: 1.25; }
.pk-types button:hover, .pk-sizes button:hover { border-color: var(--aqua); }
.pk-types button[aria-checked="true"], .pk-sizes button[aria-pressed="true"] { border-color: var(--teal); background: var(--aqua-soft); box-shadow: inset 0 0 0 1px var(--teal); }
.pk-sizes { display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px; margin-bottom: 10px; }
.pk-sizes:empty::before { content: "Спершу оберіть призначення — підкажемо типові розміри."; grid-column: 1 / -1; color: var(--muted); font-size: .9rem; padding: 6px 2px; }
.pk-own { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-bottom: 10px; }
.pk-own[hidden] { display: none; }
.pk-own label { font-size: .8rem; font-weight: 700; color: var(--ink-2); display: flex; flex-direction: column; gap: 4px; }
.pk-own input { font: inherit; font-size: 1rem; border: 1.5px solid var(--line); border-radius: 10px; padding: 8px 10px; width: 100%; }
.pk-est { min-height: 0; margin: 4px 0 12px; }
.pk-est b { display: block; color: var(--teal); font-size: 1.1rem; }
.pk-est span { display: block; font-size: .85rem; color: var(--ink-2); }
.pk-go { display: block; text-align: center; font-size: 1.05rem; }
.picker:not(.has-tip) .pk-go { background: var(--teal-2); opacity: .85; }
.pk-alt { margin: 10px 0 0; text-align: center; color: var(--muted); }
.hero-m { display: none; }
/* На телефоні підбирач — у першому екрані: довгий опис і галочки ховаємо, лишаємо одне речення. */
@media (max-width: 860px) {
  .hero .lead, .hero-ticks { display: none; }
  .hero-m { display: block; color: #eaf7f9; margin: .4em 0 0; }
  .hero-grid { gap: 16px; }
  .hero h1 { font-size: 1.6rem; }
}
@media (max-width: 520px) { .pk-types { grid-template-columns: repeat(2, 1fr); } .pk-own { grid-template-columns: 1fr 1fr 1fr; } }

/* що в конструкторі */
.gets { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 12px; }
.get { background: var(--card); border: 1px solid var(--line); border-left: 4px solid var(--aqua); border-radius: 12px; padding: 14px 16px; }
.get b { display: block; color: var(--teal); margin-bottom: 4px; }
.get span { font-size: .93rem; color: var(--ink-2); }

/* типи водойм */
.types { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 16px; }
.type { background: var(--card); border: 1px solid var(--line); border-radius: var(--r); padding: 20px; display: flex; flex-direction: column; }
.type h3 { margin: 0 0 .4em; color: var(--teal); }
.type p { margin: 0 0 .6em; color: var(--ink-2); font-size: .97rem; }
.type ul { margin: 0 0 12px; padding-left: 1.1em; font-size: .93rem; color: var(--ink-2); }
.type .type-a { margin-top: auto; display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }

/* страхи замовника */
.fears { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 16px; }
.fear { background: var(--sand-soft); border: 1px solid var(--sand); border-radius: var(--r); padding: 18px 20px; }
.fear h3 { margin: 0 0 .4em; font-size: 1.05rem; }
.fear p { margin: 0; font-size: .95rem; color: var(--ink-2); }