/* ============================================================
   SOLARIS MEDITERRANEAN — solar installation demo
   Design language: light eco-tech, sun amber + deep pine,
   Space Grotesk display, left rail navigation (desktop).
   Mobile-first.
   ============================================================ */

:root {
  --sun: #f7a416;
  --sun-deep: #d98a00;
  --pine: #0c3f37;
  --pine-ink: #07291f;
  --mist: #eef3ee;
  --paper: #fbfdfa;
  --ink: #122722;
  --muted: #5d7268;
  --line: #dde7dd;
  --rail-w: 200px;
  --radius: 18px;
  --display: 'Space Grotesk', sans-serif;
  --body: 'Inter', sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--body);
  background: var(--paper);
  color: var(--ink);
  line-height: 1.65;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
h1, h2, h3 { font-family: var(--display); line-height: 1.08; font-weight: 600; }
h2 { font-size: clamp(28px, 4.4vw, 46px); letter-spacing: -0.5px; }

.kicker {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--sun-deep);
  margin-bottom: 14px;
}
.sec-head { max-width: 680px; margin: 0 auto 48px; text-align: center; padding: 0 24px; }

/* ---------- buttons ---------- */
.btn-solid, .btn-line, .btn-sun, .btn-ghost {
  display: inline-block;
  font-family: var(--display);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  padding: 15px 30px;
  border-radius: 100px;
  transition: transform .25s ease, box-shadow .25s ease, background .25s ease, color .25s ease;
}
.btn-solid { background: var(--pine); color: #fff; }
.btn-solid:hover { background: var(--pine-ink); transform: translateY(-2px); box-shadow: 0 12px 28px rgba(12,63,55,.25); }
.btn-solid.wide { width: 100%; text-align: center; }
.btn-line { border: 1.5px solid var(--pine); color: var(--pine); }
.btn-line:hover { background: var(--pine); color: #fff; transform: translateY(-2px); }
.btn-sun { background: var(--sun); color: var(--pine-ink); }
.btn-sun:hover { background: #ffb52e; transform: translateY(-2px); box-shadow: 0 12px 28px rgba(247,164,22,.35); }
.btn-ghost { border: 1.5px solid rgba(255,255,255,.4); color: #fff; }
.btn-ghost:hover { border-color: var(--sun); color: var(--sun); }

/* ---------- rail / top bar ---------- */
.rail {
  position: fixed;
  inset: 0 auto 0 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  height: 64px;
  padding: 0 20px;
  background: rgba(251,253,250,.92);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.rail-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--display);
  font-size: 13px;
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: .4px;
  text-transform: uppercase;
  color: var(--pine);
  text-decoration: none;
}
.rail-logo svg {
  width: 30px; height: 30px; flex: none;
  fill: none; stroke: var(--sun-deep); stroke-width: 2.4;
}
.rail-logo svg circle { fill: var(--sun); stroke: none; }
.rail-nav { display: none; }
.rail-cta { display: none; }
.rail-burger {
  display: flex;
  flex-direction: column;
  gap: 6px;
  background: none;
  border: 0;
  padding: 8px;
  cursor: pointer;
}
.rail-burger span { width: 26px; height: 2px; background: var(--pine); transition: transform .3s ease, opacity .3s ease; }
.rail-burger[aria-expanded="true"] span:first-child { transform: translateY(4px) rotate(45deg); }
.rail-burger[aria-expanded="true"] span:last-child { transform: translateY(-4px) rotate(-45deg); }

/* mobile menu open state */
body.menu-open .rail { height: auto; flex-wrap: wrap; padding-bottom: 22px; }
body.menu-open .rail-nav {
  display: flex;
  flex-direction: column;
  width: 100%;
  order: 3;
  gap: 4px;
  padding-top: 12px;
}
body.menu-open .rail-nav a {
  font-family: var(--display);
  font-size: 17px;
  font-weight: 600;
  color: var(--ink);
  text-decoration: none;
  padding: 9px 4px;
  border-bottom: 1px solid var(--mist);
}
body.menu-open .rail-cta {
  display: inline-block;
  order: 4;
  margin-top: 16px;
  background: var(--sun);
  color: var(--pine-ink);
  font-family: var(--display);
  font-weight: 700;
  font-size: 14px;
  text-decoration: none;
  padding: 12px 26px;
  border-radius: 100px;
}

main { padding-top: 64px; }

/* ---------- hero ---------- */
.hero {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 48px 24px 56px;
  background:
    radial-gradient(ellipse 90% 60% at 100% 0%, rgba(247,164,22,.14) 0%, transparent 60%),
    linear-gradient(180deg, var(--mist) 0%, var(--paper) 90%);
  overflow: hidden;
}
.hero-art { order: 2; margin: 12px 0 0; pointer-events: none; }
.hero-art img {
  width: 100%;
  border-radius: var(--radius);
  box-shadow: 0 24px 60px rgba(7, 41, 31, .22);
}
.hero-copy { order: 1; max-width: 620px; }
.hero h1 {
  font-size: clamp(40px, 9vw, 76px);
  letter-spacing: -1.5px;
  margin-bottom: 22px;
}
.hero h1 em {
  font-style: normal;
  color: var(--sun-deep);
  position: relative;
  white-space: nowrap;
}
.hero h1 em::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: 4px;
  height: 10px;
  background: rgba(247,164,22,.28);
  z-index: -1;
  border-radius: 4px;
}
.hero-sub { font-size: 17px; color: var(--muted); max-width: 480px; margin-bottom: 30px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 26px; }
.hero-ticks { list-style: none; display: flex; flex-wrap: wrap; gap: 8px 22px; }
.hero-ticks li {
  font-size: 13px;
  font-weight: 500;
  color: var(--pine);
  padding-left: 22px;
  position: relative;
}
.hero-ticks li::before {
  content: '';
  position: absolute;
  left: 0; top: 4px;
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--sun);
  clip-path: polygon(14% 44%, 0 60%, 42% 100%, 100% 16%, 84% 4%, 40% 70%);
}

/* ---------- stat band ---------- */
.band {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px 16px;
  background: var(--pine);
  color: #fff;
  padding: 48px 28px;
}
.band-item { text-align: center; }
.band-item strong {
  font-family: var(--display);
  font-size: clamp(30px, 5vw, 46px);
  font-weight: 700;
  display: block;
  color: var(--sun);
}
.band-item span { font-size: 12.5px; letter-spacing: .6px; text-transform: uppercase; opacity: .75; }

/* ---------- calculator ---------- */
.calc { padding: 84px 24px; }
.calc-grid { max-width: 1020px; margin: 0 auto; display: grid; gap: 28px; }
.calc-inputs label {
  display: block;
  font-family: var(--display);
  font-weight: 600;
  font-size: 16px;
  margin: 26px 0 14px;
}
.calc-inputs label:first-child { margin-top: 0; }
.calc-slider-row { display: flex; align-items: center; gap: 18px; }
.calc-slider-row output {
  font-family: var(--display);
  font-size: 22px;
  font-weight: 700;
  color: var(--pine);
  min-width: 86px;
  text-align: right;
}
input[type="range"] {
  flex: 1;
  -webkit-appearance: none;
  appearance: none;
  height: 6px;
  border-radius: 3px;
  background: linear-gradient(to right, var(--sun) 0%, var(--sun) var(--fill, 30%), var(--line) var(--fill, 30%));
  outline-offset: 4px;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 26px; height: 26px;
  border-radius: 50%;
  background: var(--pine);
  border: 4px solid #fff;
  box-shadow: 0 2px 10px rgba(7,41,31,.35);
  cursor: pointer;
}
input[type="range"]::-moz-range-thumb {
  width: 18px; height: 18px;
  border-radius: 50%;
  background: var(--pine);
  border: 4px solid #fff;
  box-shadow: 0 2px 10px rgba(7,41,31,.35);
  cursor: pointer;
}
.calc-seg { display: flex; gap: 8px; }
.calc-seg button {
  flex: 1;
  font-family: var(--display);
  font-size: 15px;
  font-weight: 600;
  padding: 12px 0;
  border-radius: 12px;
  border: 1.5px solid var(--line);
  background: #fff;
  color: var(--muted);
  cursor: pointer;
  transition: all .2s ease;
}
.calc-seg button.active { background: var(--pine); border-color: var(--pine); color: #fff; }
.calc-note { font-size: 12.5px; color: var(--muted); margin-top: 22px; }
.calc-results { display: flex; flex-direction: column; gap: 12px; }
.calc-card {
  background: var(--mist);
  border-radius: var(--radius);
  padding: 18px 20px;
}
.calc-card span { font-size: 12px; letter-spacing: 1px; text-transform: uppercase; color: var(--muted); display: block; margin-bottom: 4px; }
.calc-card strong { font-family: var(--display); font-size: 26px; font-weight: 700; color: var(--pine); }
.calc-card.main { background: var(--pine); }
.calc-card.main span { color: rgba(255,255,255,.65); }
.calc-card.main strong { font-size: clamp(38px, 7vw, 54px); color: var(--sun); }
.calc-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.calc-row .calc-card { padding: 14px 12px; }
.calc-row .calc-card strong { font-size: 19px; }

/* ---------- bento ---------- */
.why { padding: 84px 24px; background: var(--mist); }
.bento { max-width: 1020px; margin: 0 auto; display: grid; gap: 18px; }
.cell {
  background: #fff;
  border-radius: var(--radius);
  padding: 30px 28px;
  border: 1px solid var(--line);
  display: flex;
  flex-direction: column;
}
.cell h3 { font-size: 21px; margin-bottom: 10px; }
.cell p { font-size: 14.5px; color: var(--muted); }
.cell-img { margin: 22px -28px -30px; border-radius: 0 0 var(--radius) var(--radius); overflow: hidden; }
.cell-img img { width: 100%; height: 100%; object-fit: cover; }

/* ---------- process ---------- */
.process { padding: 84px 24px; }
.steps {
  max-width: 1020px;
  margin: 0 auto;
  list-style: none;
  display: grid;
  gap: 14px;
  counter-reset: step;
}
.steps li {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px 24px 26px 86px;
  transition: border-color .25s ease, box-shadow .25s ease;
}
.steps li:hover { border-color: var(--sun); box-shadow: 0 10px 30px rgba(18,39,34,.07); }
.step-no {
  position: absolute;
  left: 24px; top: 26px;
  font-family: var(--display);
  font-size: 26px;
  font-weight: 700;
  color: var(--sun);
}
.steps h3 { font-size: 19px; margin-bottom: 6px; }
.steps p { font-size: 14.5px; color: var(--muted); }

/* ---------- systems ---------- */
.systems { padding: 84px 24px; background: linear-gradient(180deg, var(--paper) 0%, var(--mist) 100%); }
.sys-grid { max-width: 1020px; margin: 0 auto; display: grid; gap: 20px; }
.sys-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 34px 30px;
  display: flex;
  flex-direction: column;
  gap: 0;
}
.sys-card.featured { border: 2px solid var(--sun); position: relative; box-shadow: 0 18px 44px rgba(247,164,22,.16); }
.sys-flag {
  position: absolute;
  top: -13px; left: 28px;
  background: var(--sun);
  color: var(--pine-ink);
  font-family: var(--display);
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  padding: 4px 14px;
  border-radius: 100px;
}
.sys-card h3 { font-size: 24px; }
.sys-spec { font-family: var(--display); font-size: 14px; font-weight: 600; color: var(--sun-deep); margin: 4px 0 12px; }
.sys-for { font-size: 14px; color: var(--muted); margin-bottom: 18px; min-height: 0; }
.sys-card ul { list-style: none; margin-bottom: 22px; }
.sys-card li {
  font-size: 14px;
  padding: 8px 0 8px 24px;
  border-bottom: 1px dashed var(--line);
  position: relative;
}
.sys-card li::before {
  content: '';
  position: absolute;
  left: 2px; top: 14px;
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--mist);
  border: 3px solid var(--sun);
}
.sys-price { font-family: var(--display); font-size: 30px; font-weight: 700; color: var(--pine); margin-bottom: 20px; }
.sys-price em { font-style: normal; font-size: 14px; font-weight: 500; color: var(--muted); margin-right: 4px; }
.sys-price span { display: block; font-size: 12px; font-weight: 500; color: var(--muted); }
.sys-card .btn-line, .sys-card .btn-solid { text-align: center; margin-top: auto; }

/* ---------- quotes ---------- */
.quotes {
  padding: 84px 24px;
  display: grid;
  gap: 20px;
  max-width: 1020px;
  margin: 0 auto;
}
.quotes figure {
  background: var(--pine);
  color: #fff;
  border-radius: var(--radius);
  padding: 32px 30px;
}
.quotes blockquote {
  font-family: var(--display);
  font-size: 18.5px;
  font-weight: 500;
  line-height: 1.45;
  margin-bottom: 18px;
}
.quotes figcaption { font-size: 13px; color: var(--sun); letter-spacing: .4px; }

/* ---------- faq ---------- */
.faq { padding: 84px 24px; background: var(--mist); }
.faq-list { max-width: 760px; margin: 0 auto; display: grid; gap: 10px; }
.faq details {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
}
.faq summary {
  font-family: var(--display);
  font-size: 16.5px;
  font-weight: 600;
  padding: 20px 56px 20px 24px;
  cursor: pointer;
  list-style: none;
  position: relative;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: '+';
  position: absolute;
  right: 22px; top: 50%;
  transform: translateY(-50%);
  font-size: 24px;
  font-weight: 400;
  color: var(--sun-deep);
  transition: transform .25s ease;
}
.faq details[open] summary::after { transform: translateY(-50%) rotate(45deg); }
.faq details p { padding: 0 24px 22px; font-size: 14.5px; color: var(--muted); }

/* ---------- quote cta + D&L pitch ---------- */
.quote, .dl-pitch {
  background: var(--pine-ink);
  color: #fff;
  text-align: center;
  padding: 90px 24px;
  position: relative;
  overflow: hidden;
}
.quote::before {
  content: '';
  position: absolute;
  top: -120px; right: -120px;
  width: 340px; height: 340px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(247,164,22,.35) 0%, transparent 70%);
}
.quote-inner, .dl-pitch { position: relative; }
.quote h2, .dl-pitch h2 { margin-bottom: 16px; }
.quote p, .dl-pitch p { color: rgba(255,255,255,.7); max-width: 520px; margin: 0 auto 30px; }
.quote-actions { display: flex; flex-wrap: wrap; gap: 14px; justify-content: center; }
.quote-small { font-size: 13px; margin-top: 26px !important; opacity: .8; }

.dl-pitch { background: #10211d; border-top: 1px solid rgba(247,164,22,.25); }
.dl-pitch .kicker { color: var(--sun); }

/* ---------- footer ---------- */
.footer {
  background: var(--pine-ink);
  color: rgba(255,255,255,.5);
  text-align: center;
  font-size: 12.5px;
  padding: 28px 24px 36px;
  border-top: 1px solid rgba(255,255,255,.08);
}
.footer a { color: var(--sun); text-decoration: none; }
.footer p + p { margin-top: 6px; }

/* ---------- reveal animations ---------- */
.reveal-init { opacity: 0; transform: translateY(26px); }
.reveal-in { opacity: 1; transform: none; transition: opacity .7s ease, transform .7s ease; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal-init { opacity: 1; transform: none; }
}

/* ============================================================
   DESKTOP — left rail navigation takes over
   ============================================================ */
@media (min-width: 920px) {
  .rail {
    inset: 0 auto 0 0;
    width: var(--rail-w);
    height: 100vh;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    padding: 36px 26px;
    border-bottom: 0;
    border-right: 1px solid var(--line);
  }
  .rail-burger { display: none; }
  .rail-nav {
    display: flex;
    flex-direction: column;
    gap: 2px;
    margin-top: 56px;
  }
  .rail-nav a {
    font-family: var(--display);
    font-size: 14.5px;
    font-weight: 500;
    color: var(--muted);
    text-decoration: none;
    padding: 10px 12px;
    border-radius: 10px;
    transition: background .2s ease, color .2s ease;
  }
  .rail-nav a:hover, .rail-nav a.current { background: var(--mist); color: var(--pine); }
  .rail-cta {
    display: block;
    margin-top: auto;
    background: var(--sun);
    color: var(--pine-ink);
    font-family: var(--display);
    font-size: 14px;
    font-weight: 700;
    text-align: center;
    text-decoration: none;
    padding: 14px 0;
    border-radius: 100px;
    transition: transform .25s ease, box-shadow .25s ease;
  }
  .rail-cta:hover { transform: translateY(-2px); box-shadow: 0 10px 26px rgba(247,164,22,.4); }

  main, .dl-pitch, .footer { margin-left: var(--rail-w); }
  main { padding-top: 0; }

  .hero {
    flex-direction: row;
    align-items: center;
    min-height: 100vh;
    padding: 80px 60px;
    gap: 40px;
  }
  .hero-copy { order: 1; flex: 1.1; }
  .hero-art { order: 2; flex: 1; margin: 0; }
  .hero-art img { width: 100%; }

  .band { grid-template-columns: repeat(4, 1fr); padding: 56px 60px; }

  .calc-grid { grid-template-columns: 1fr 1fr; gap: 56px; align-items: start; }
  .bento { grid-template-columns: repeat(3, 1fr); }
  .cell.tall { grid-row: span 2; }
  .cell.wide { grid-column: span 2; }
  .cell.wide .cell-img { max-height: 260px; }

  .steps { grid-template-columns: repeat(4, 1fr); }
  .steps li { padding: 76px 24px 30px; }
  .step-no { top: 26px; left: 24px; }

  .sys-grid { grid-template-columns: repeat(3, 1fr); align-items: stretch; }
  .quotes { grid-template-columns: repeat(3, 1fr); }
}