/* Electrolips Solar Water Lift Review */

:root {
  --bg: #05080c;
  --bg-soft: #0b1118;
  --panel: rgba(13, 22, 31, 0.94);
  --panel-strong: rgba(17, 29, 41, 0.98);
  --text: #e8edf2;
  --muted: #a7b4c1;
  --line: #29475c;
  --accent: #6ac6ff;
  --accent-soft: #b8e8ff;
  --heat: #f3a44a;
  --success: #79d6b0;
  --shadow: rgba(0, 0, 0, 0.38);
  --max-width: 1240px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  background:
    linear-gradient(rgba(2, 6, 10, 0.90), rgba(2, 6, 10, 0.96)),
    radial-gradient(circle at 15% 10%, rgba(28, 84, 116, 0.35), transparent 30%),
    radial-gradient(circle at 88% 22%, rgba(156, 87, 24, 0.20), transparent 26%),
    #05080c;
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.75;
}

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

a:hover,
a:focus {
  text-decoration: underline;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid var(--line);
  background: rgba(3, 7, 11, 0.95);
  backdrop-filter: blur(12px);
}

.header-inner {
  width: min(var(--max-width), calc(100% - 32px));
  margin: 0 auto;
  padding: 12px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.brand {
  color: #ffffff;
  font-weight: 900;
  letter-spacing: 0.18em;
  text-decoration: none;
}

.brand:hover {
  text-decoration: none;
}

.top-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
}

.top-nav a,
.top-nav button {
  border: 1px solid var(--line);
  border-radius: 7px;
  padding: 8px 12px;
  background: #0d1923;
  color: var(--text);
  font: inherit;
  font-size: 0.91rem;
  cursor: pointer;
}

.top-nav a:hover,
.top-nav button:hover {
  background: #153047;
  text-decoration: none;
}

main {
  width: min(var(--max-width), calc(100% - 32px));
  margin: 0 auto;
}

.hero {
  margin: 52px 0 20px;
  padding: 44px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background:
    linear-gradient(130deg, rgba(18, 43, 59, 0.96), rgba(10, 18, 26, 0.96)),
    var(--panel);
  box-shadow: 0 22px 60px var(--shadow);
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--heat);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  font-size: 0.78rem;
  font-weight: 800;
}

h1 {
  margin: 0;
  max-width: 900px;
  font-size: clamp(2.4rem, 6vw, 5.4rem);
  line-height: 1;
  letter-spacing: -0.045em;
}

.subtitle {
  max-width: 900px;
  margin: 22px 0 0;
  color: var(--accent-soft);
  font-size: clamp(1.08rem, 2.5vw, 1.55rem);
  line-height: 1.45;
}

.byline {
  margin: 18px 0 0;
  color: var(--muted);
}

.notice {
  padding: 17px 20px;
  border: 1px solid #5e522b;
  border-radius: 10px;
  background: rgba(65, 51, 14, 0.48);
  color: #f2e7be;
}

.page-grid {
  display: grid;
  grid-template-columns: minmax(230px, 290px) minmax(0, 1fr);
  gap: 24px;
  margin-top: 24px;
  align-items: start;
}

.contents {
  position: sticky;
  top: 86px;
  max-height: calc(100vh - 105px);
  overflow: auto;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--panel);
  box-shadow: 0 16px 35px var(--shadow);
}

.contents h2 {
  margin: 0 0 12px;
  font-size: 1.25rem;
}

.contents ol {
  margin: 0;
  padding-left: 21px;
}

.contents li {
  margin: 7px 0;
  color: var(--muted);
  line-height: 1.4;
}

.contents a {
  font-size: 0.91rem;
}

.contents a.active {
  color: #ffffff;
  font-weight: 800;
}

.article {
  min-width: 0;
  padding: 35px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--panel);
  box-shadow: 0 18px 46px var(--shadow);
}

.article section {
  scroll-margin-top: 95px;
}

.article section + section {
  margin-top: 58px;
  padding-top: 10px;
}

h2 {
  margin: 0 0 18px;
  color: var(--accent-soft);
  font-size: clamp(1.55rem, 3vw, 2.15rem);
  line-height: 1.2;
}

h3 {
  margin-top: 30px;
  color: var(--accent);
  font-size: 1.2rem;
  line-height: 1.3;
}

p {
  margin: 1rem 0;
}

ul,
ol {
  padding-left: 1.45rem;
}

li {
  margin: 0.48rem 0;
}

blockquote {
  margin: 24px 0;
  padding: 20px 24px;
  border-left: 5px solid var(--accent);
  border-radius: 8px;
  background: rgba(18, 45, 62, 0.74);
  color: #f4f8fb;
  font-size: 1.06rem;
}

.highlight {
  padding: 18px 20px;
  border: 1px solid #2b6956;
  border-radius: 10px;
  background: rgba(17, 66, 51, 0.42);
  color: #d7fff0;
}

.feature-section {
  padding: 26px;
  border: 1px solid #8a5a25;
  border-radius: 14px;
  background:
    linear-gradient(145deg, rgba(62, 36, 15, 0.44), rgba(11, 21, 29, 0.94));
}

.section-label {
  margin: 0 0 7px;
  color: var(--heat);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.13em;
  font-weight: 800;
}

.process-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin: 24px 0;
}

.process-grid div {
  padding: 15px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: var(--panel-strong);
  text-align: center;
  font-weight: 700;
}

.table-wrap {
  overflow-x: auto;
  margin: 24px 0;
}

table {
  width: 100%;
  min-width: 620px;
  border-collapse: collapse;
  background: #09121a;
}

th,
td {
  padding: 13px 14px;
  border: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

th {
  background: #102538;
  color: var(--accent-soft);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.info-card {
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: var(--panel-strong);
}

.info-card h3 {
  margin-top: 0;
}

.spec-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: 22px 0;
}

.spec-list div {
  padding: 14px;
  border-left: 3px solid var(--heat);
  background: #0b1721;
}

.roadmap {
  counter-reset: roadmap;
  list-style: none;
  padding: 0;
}

.roadmap li {
  position: relative;
  margin: 0 0 15px;
  padding: 18px 18px 18px 58px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--panel-strong);
}

.roadmap li::before {
  counter-increment: roadmap;
  content: counter(roadmap);
  position: absolute;
  left: 16px;
  top: 16px;
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--accent);
  color: #06101a;
  font-weight: 900;
}

.final-principle {
  padding: 23px;
  border: 1px solid var(--accent);
  border-radius: 11px;
  background: linear-gradient(145deg, rgba(18, 55, 75, 0.85), rgba(12, 28, 39, 0.96));
  font-size: 1.1rem;
  font-weight: 800;
}

.references {
  color: var(--muted);
}

.references a {
  overflow-wrap: anywhere;
}

.bottom-view-space {
  min-height: 1500px;
}

.top-button {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 60;
  display: none;
  padding: 11px 16px;
  border: 1px solid var(--accent);
  border-radius: 8px;
  background: #0c2434;
  color: #ffffff;
  font-weight: 800;
  cursor: pointer;
  box-shadow: 0 10px 25px var(--shadow);
}

.top-button.visible {
  display: block;
}

footer {
  padding: 28px 18px;
  border-top: 1px solid var(--line);
  background: #020509;
  color: var(--muted);
  text-align: center;
}

footer p {
  margin: 5px 0;
}

@media (max-width: 940px) {
  .page-grid {
    grid-template-columns: 1fr;
  }

  .contents {
    position: static;
    max-height: none;
  }

  .contents ol {
    columns: 2;
    column-gap: 32px;
  }
}

@media (max-width: 680px) {
  .header-inner {
    align-items: flex-start;
    flex-direction: column;
  }

  .top-nav {
    justify-content: flex-start;
  }

  .hero,
  .article {
    padding: 22px;
  }

  .hero {
    margin-top: 28px;
  }

  .contents ol {
    columns: 1;
  }

  .process-grid,
  .card-grid,
  .spec-list {
    grid-template-columns: 1fr;
  }

  .feature-section {
    padding: 20px;
  }

  .bottom-view-space {
    min-height: 1000px;
  }
}

@media print {
  body {
    background: #ffffff;
    color: #000000;
  }

  .site-header,
  .contents,
  .top-button,
  .bottom-view-space {
    display: none !important;
  }

  main {
    width: 100%;
  }

  .hero,
  .notice,
  .article,
  .feature-section,
  .info-card,
  .roadmap li {
    background: #ffffff;
    color: #000000;
    box-shadow: none;
  }

  .page-grid {
    display: block;
  }

  h1,
  h2,
  h3,
  .subtitle,
  a {
    color: #000000;
  }

  blockquote,
  .highlight,
  .final-principle {
    background: #f3f3f3;
    color: #000000;
  }

  footer {
    background: #ffffff;
    color: #000000;
  }
}