/* ==========================================================================
   Arkhe Energie — site styles
   Palette taken from the IESS brochure & logo
   ========================================================================== */

:root {
  --navy: #0a2444;
  --navy-2: #12325a;
  --navy-deep: #071a33;
  --teal: #0e7c85;
  --teal-dark: #0a636b;
  --teal-tint: #e8f3f3;
  --green: #6dbd44;
  --green-dark: #56a031;
  --green-tint: #eef7e8;
  --ink: #0f1f33;
  --body: #3f4c5c;
  --muted: #6b7786;
  --line: #dfe5ea;
  --bg: #ffffff;
  --bg-soft: #f5f8fa;
  --radius: 10px;
  --radius-lg: 16px;
  --shadow: 0 10px 30px rgba(10, 36, 68, 0.08);
  --shadow-lg: 0 24px 60px rgba(10, 36, 68, 0.14);
  --container: 1180px;
  --font-head: "Montserrat", system-ui, sans-serif;
  --font-body: "Source Sans 3", system-ui, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.65;
  color: var(--body);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }

a { color: var(--teal); text-decoration: none; }
a:hover { color: var(--teal-dark); }

h1, h2, h3, h4 {
  font-family: var(--font-head);
  color: var(--navy);
  line-height: 1.15;
  margin: 0 0 0.5em;
  letter-spacing: -0.01em;
}
h1 { font-size: clamp(2.2rem, 5vw, 3.6rem); font-weight: 800; }
h2 { font-size: clamp(1.75rem, 3.4vw, 2.5rem); font-weight: 800; }
h3 { font-size: 1.2rem; font-weight: 700; }
p { margin: 0 0 1em; }

.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 24px; }

.skip-link {
  position: absolute; left: -9999px; top: 0;
  background: var(--navy); color: #fff; padding: 10px 16px; z-index: 200;
}
.skip-link:focus { left: 12px; top: 12px; }

:focus-visible { outline: 3px solid var(--green); outline-offset: 2px; }

/* ---------- Utility text ---------- */
.eyebrow {
  display: inline-block;
  font-family: var(--font-head);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 14px;
}
.on-dark .eyebrow, .eyebrow.light { color: #8fd3d6; }
.text-teal { color: var(--teal); }
.text-green { color: var(--green); }
.lead { font-size: 1.2rem; color: var(--body); max-width: 640px; }
.center { text-align: center; }
.center .lead { margin-left: auto; margin-right: auto; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  font-family: var(--font-head); font-weight: 700; font-size: 0.95rem;
  padding: 14px 26px; border-radius: 8px; border: 2px solid transparent;
  cursor: pointer; transition: background .2s, color .2s, border-color .2s, transform .2s;
  text-align: center; line-height: 1.2;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--green); color: var(--navy); }
.btn-primary:hover { background: #7fcb57; color: var(--navy); }
.btn-teal { background: var(--teal); color: #fff; }
.btn-teal:hover { background: var(--teal-dark); color: #fff; }
.btn-outline { border-color: var(--navy); color: var(--navy); background: transparent; }
.btn-outline:hover { background: var(--navy); color: #fff; }
.btn-ghost { border-color: rgba(255,255,255,.5); color: #fff; }
.btn-ghost:hover { background: #fff; color: var(--navy); }
.btn svg { width: 18px; height: 18px; flex-shrink: 0; }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,.96);
  backdrop-filter: saturate(160%) blur(8px);
  border-bottom: 1px solid var(--line);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 78px; gap: 24px; }
.brand img { height: 52px; width: auto; }
.main-nav ul { list-style: none; margin: 0; padding: 0; display: flex; gap: 6px; align-items: center; }
.main-nav a {
  display: block; padding: 10px 14px; border-radius: 6px;
  font-family: var(--font-head); font-weight: 600; font-size: 0.92rem; color: var(--navy);
}
.main-nav a:hover { background: var(--bg-soft); }
.main-nav a[aria-current="page"] { color: var(--teal); }
.main-nav .btn { padding: 11px 18px; margin-left: 8px; }
.main-nav .btn:hover { background: #7fcb57; }

.nav-toggle {
  display: none; background: none; border: 0; padding: 10px; cursor: pointer; color: var(--navy);
}
.nav-toggle svg { width: 28px; height: 28px; }

@media (max-width: 960px) {
  .nav-toggle { display: block; }
  .main-nav {
    position: fixed; inset: 78px 0 auto 0; background: #fff;
    border-bottom: 1px solid var(--line); box-shadow: var(--shadow);
    display: none; max-height: calc(100vh - 78px); overflow-y: auto;
  }
  .main-nav.open { display: block; }
  .main-nav ul { flex-direction: column; align-items: stretch; padding: 12px 24px 24px; gap: 2px; }
  .main-nav a { padding: 14px 8px; font-size: 1rem; border-bottom: 1px solid var(--line); border-radius: 0; }
  .main-nav .btn { margin: 14px 0 0; border-bottom: 0; border-radius: 8px; }
  .brand img { height: 44px; }
}

/* ---------- Brand stripe (from brochure) ---------- */
.brand-stripe { display: grid; grid-template-columns: 50% 30% 20%; height: 8px; }
.brand-stripe span:nth-child(1) { background: var(--navy); }
.brand-stripe span:nth-child(2) { background: var(--teal); }
.brand-stripe span:nth-child(3) { background: var(--green); }

/* ---------- Sections ---------- */
.section { padding: 96px 0; }
.section-sm { padding: 64px 0; }
.section.soft { background: var(--bg-soft); }
.section.dark, .on-dark { background: var(--navy); color: #c9d4e2; }
.section.dark h2, .section.dark h3, .on-dark h2, .on-dark h3 { color: #fff; }
.teal { background: var(--teal); color: #e3f3f4; }
.teal h2, .teal h3 { color: #fff; }
.section-head { margin-bottom: 48px; max-width: 760px; }
.section-head.center { margin-left: auto; margin-right: auto; }

@media (max-width: 720px) {
  .section { padding: 64px 0; }
  .section-sm { padding: 48px 0; }
  .section-head { margin-bottom: 32px; }
}

/* ---------- Hero ---------- */
.hero { position: relative; overflow: hidden; background: #fff; }
.hero-grid {
  display: grid; grid-template-columns: 1.05fr 1fr; gap: 56px; align-items: center;
  padding-top: 72px; padding-bottom: 96px;
}
.hero h1 { margin-bottom: 20px; }
.hero .product-line {
  display: flex; flex-wrap: wrap; align-items: baseline; gap: 6px 14px; margin: 0 0 14px;
}
.hero .product-line strong { font-family: var(--font-head); font-size: 1.6rem; font-weight: 800; color: var(--green); }
.hero .product-line span {
  font-family: var(--font-head); font-size: 0.78rem; font-weight: 700; letter-spacing: 0.22em;
  text-transform: uppercase; color: var(--muted);
}
.hero-cta { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 30px; }
.badge-india {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-head); font-size: 0.72rem; font-weight: 700; letter-spacing: 0.16em;
  text-transform: uppercase; color: var(--navy);
  border: 1.5px solid var(--navy); border-radius: 6px; padding: 6px 12px; margin-bottom: 26px;
}
.hero-visual { position: relative; }
.hero-visual .photo {
  border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-lg); aspect-ratio: 4 / 3.3;
}
.hero-visual .photo img { width: 100%; height: 100%; object-fit: cover; }
.hero-card {
  position: absolute; left: -40px; bottom: -36px; max-width: 320px;
  background: var(--navy); color: #c9d4e2; padding: 26px 28px; border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
}
.hero-card .k { font-family: var(--font-head); font-size: 0.7rem; letter-spacing: .2em; text-transform: uppercase; color: #8fd3d6; font-weight: 700; }
.hero-card .big { font-family: var(--font-head); font-weight: 800; font-size: 2.6rem; color: var(--green); line-height: 1.1; margin: 6px 0 2px; }
.hero-card .sub { color: #fff; font-family: var(--font-head); font-weight: 600; }

@media (max-width: 960px) {
  .hero-grid { grid-template-columns: 1fr; padding-top: 48px; padding-bottom: 80px; gap: 40px; }
  .hero-card { left: 16px; bottom: -40px; }
}
@media (max-width: 480px) {
  .hero-card { position: relative; left: 0; bottom: 0; margin-top: -40px; margin-left: 16px; margin-right: 16px; max-width: none; }
  .hero-grid { padding-bottom: 56px; }
}

/* Page hero (inner pages) */
.page-hero { background: var(--navy); color: #c9d4e2; padding: 80px 0 72px; position: relative; overflow: hidden; }
.page-hero h1 { color: #fff; font-size: clamp(2rem, 4.4vw, 3rem); max-width: 820px; }
.page-hero .lead { color: #c9d4e2; }
.page-hero .eyebrow { color: #8fd3d6; }
.page-hero::after {
  content: ""; position: absolute; right: -120px; top: -120px; width: 420px; height: 420px; border-radius: 50%;
  border: 60px solid rgba(109, 189, 68, 0.08);
}

/* ---------- Stat strip ---------- */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; }
.stat .num { font-family: var(--font-head); font-weight: 800; font-size: clamp(2.2rem, 4vw, 3rem); color: #fff; line-height: 1; }
.stat .num .unit { font-size: 0.6em; }
.stat .label { margin-top: 10px; color: #d5ecee; font-size: 1rem; }
.stats.light .num { color: var(--teal); }
.stats.light .label { color: var(--body); }
@media (max-width: 800px) { .stats { grid-template-columns: repeat(2, 1fr); } }

/* ---------- Benefits grid ---------- */
.benefits { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px 48px; }
.benefit { display: flex; gap: 18px; padding: 22px 0; border-bottom: 1px solid var(--line); }
.benefit .n {
  flex-shrink: 0; width: 46px; height: 46px; border-radius: 50%;
  background: var(--teal-tint); color: var(--teal);
  display: grid; place-items: center; font-family: var(--font-head); font-weight: 700; font-size: 0.9rem;
}
.benefit h3 { margin-bottom: 4px; font-size: 1.1rem; }
.benefit p { margin: 0; color: var(--muted); }
@media (max-width: 760px) { .benefits { grid-template-columns: 1fr; gap: 0; } }

/* ---------- Cards ---------- */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg);
  padding: 32px; box-shadow: 0 1px 0 rgba(10,36,68,.02);
  transition: box-shadow .25s, transform .25s;
}
.card:hover { box-shadow: var(--shadow); transform: translateY(-2px); }
.card .icon {
  width: 52px; height: 52px; border-radius: 12px; background: var(--green-tint); color: var(--green-dark);
  display: grid; place-items: center; margin-bottom: 20px;
}
.card .icon svg { width: 26px; height: 26px; }
.card p { margin: 0; color: var(--muted); }
@media (max-width: 900px) { .cards { grid-template-columns: 1fr; } }
@media (min-width: 600px) and (max-width: 900px) { .cards { grid-template-columns: repeat(2, 1fr); } }

/* ---------- Requirements band ---------- */
.req-band { display: grid; grid-template-columns: 1fr auto; gap: 40px; align-items: center; }
.req-band h2 { margin: 0; }
.req-band h2 .text-green { white-space: nowrap; }
.reqs { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 32px; }
.req {
  border: 1px solid rgba(255,255,255,.22); border-radius: 8px; padding: 18px 20px;
  color: #fff; font-family: var(--font-head); font-weight: 600; display: flex; gap: 12px; align-items: center;
}
.req svg { width: 22px; height: 22px; color: var(--green); flex-shrink: 0; }
@media (max-width: 760px) { .reqs { grid-template-columns: 1fr; } .req-band { grid-template-columns: 1fr; } }

/* ---------- Split layout ---------- */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.split.reverse > :first-child { order: 2; }
.split .media img { border-radius: var(--radius-lg); box-shadow: var(--shadow); width: 100%; }
@media (max-width: 900px) {
  .split { grid-template-columns: 1fr; gap: 36px; }
  .split.reverse > :first-child { order: 0; }
}

/* ---------- Key figures list ---------- */
.figures { display: grid; gap: 0; }
.figure { padding: 22px 0; border-bottom: 1px solid var(--line); }
.figure:first-child { padding-top: 0; }
.figure .v { font-family: var(--font-head); font-weight: 800; font-size: 2.6rem; color: var(--teal); line-height: 1.1; }
.figure .d { color: var(--muted); }

/* ---------- Spec box ---------- */
.spec-chip {
  background: var(--teal-tint); border-radius: var(--radius); padding: 24px 28px;
}
.spec-chip .k { font-family: var(--font-head); font-size: 0.75rem; letter-spacing: .2em; font-weight: 700; text-transform: uppercase; color: var(--teal); margin-bottom: 14px; }
.spec-chip .row { display: flex; flex-wrap: wrap; gap: 20px 36px; }
.spec-chip .v { font-family: var(--font-head); font-weight: 800; font-size: 1.5rem; color: var(--navy); line-height: 1.1; }
.spec-chip .l { font-size: 0.9rem; color: var(--muted); }

.spec-table { width: 100%; border-collapse: collapse; font-size: 1rem; }
.spec-table th, .spec-table td { text-align: left; padding: 16px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
.spec-table th { font-family: var(--font-head); font-weight: 700; color: var(--navy); width: 38%; font-size: 0.95rem; }
.spec-table tr:first-child th, .spec-table tr:first-child td { border-top: 1px solid var(--line); }

/* ---------- Steps ---------- */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; counter-reset: step; }
.step { border-top: 3px solid var(--line); padding-top: 18px; }
.step .s { font-family: var(--font-head); font-weight: 800; color: var(--teal); font-size: 0.95rem; margin-bottom: 8px; }
.step p { margin: 0; }
.step.highlight { border-top-color: var(--green); }
.step.highlight .s { color: var(--green-dark); }
.step.highlight p { color: var(--navy); font-weight: 600; }
@media (max-width: 860px) { .steps { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 480px) { .steps { grid-template-columns: 1fr; } }

.diagram {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg);
  padding: 24px; margin-bottom: 40px;
}
.diagram img { margin: 0 auto; }

/* ---------- Installations ---------- */
.inst-cols { display: grid; grid-template-columns: 1fr 1fr; gap: 24px 64px; }
.inst-cols h3 {
  font-size: 0.8rem; letter-spacing: .2em; text-transform: uppercase; color: var(--navy);
  padding-bottom: 12px; border-bottom: 2px solid var(--navy); margin-bottom: 0;
}
.inst { display: flex; justify-content: space-between; gap: 16px; align-items: baseline; padding: 18px 0; border-bottom: 1px solid var(--line); }
.inst .name { font-family: var(--font-head); font-weight: 700; color: var(--navy); font-size: 1rem; }
.inst .meta { font-size: 0.9rem; color: var(--muted); }
.inst .pct { font-family: var(--font-head); font-weight: 800; color: var(--teal); font-size: 1.35rem; white-space: nowrap; }
@media (max-width: 800px) { .inst-cols { grid-template-columns: 1fr; } }

.inst-table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius-lg); background: #fff; }
.inst-table { width: 100%; border-collapse: collapse; min-width: 560px; }
.inst-table th, .inst-table td { padding: 14px 18px; text-align: left; border-bottom: 1px solid var(--line); }
.inst-table thead th {
  font-family: var(--font-head); font-size: 0.75rem; letter-spacing: .14em; text-transform: uppercase;
  color: var(--muted); background: var(--bg-soft); font-weight: 700;
}
.inst-table tbody tr:last-child td { border-bottom: 0; }
.inst-table td.site { font-weight: 600; color: var(--navy); }
.inst-table td.pct { font-family: var(--font-head); font-weight: 800; color: var(--teal); text-align: right; }
.inst-table th.pct { text-align: right; }
.bar { display: inline-block; height: 6px; border-radius: 3px; background: var(--green); vertical-align: middle; margin-right: 10px; opacity: .85; }

.tabs { display: inline-flex; background: var(--bg-soft); border-radius: 10px; padding: 5px; margin-bottom: 28px; flex-wrap: wrap; }
.tab {
  border: 0; background: transparent; padding: 10px 20px; border-radius: 7px; cursor: pointer;
  font-family: var(--font-head); font-weight: 700; font-size: 0.9rem; color: var(--muted);
}
.tab[aria-selected="true"] { background: #fff; color: var(--navy); box-shadow: 0 2px 8px rgba(10,36,68,.08); }

/* Gallery */
.gallery { display: grid; grid-template-columns: repeat(6, 1fr); grid-auto-rows: 180px; gap: 16px; }
.gallery figure { margin: 0; border-radius: var(--radius); overflow: hidden; position: relative; background: var(--bg-soft); }
.gallery img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
.gallery figure:hover img { transform: scale(1.04); }
.gallery .g1 { grid-column: span 4; grid-row: span 2; }
.gallery .g2 { grid-column: span 2; grid-row: span 2; }
.gallery .g3 { grid-column: span 2; grid-row: span 2; }
.gallery .g4 { grid-column: span 2; grid-row: span 2; }
.gallery .g5 { grid-column: span 2; grid-row: span 2; }
@media (max-width: 800px) {
  .gallery { grid-template-columns: repeat(2, 1fr); grid-auto-rows: 160px; }
  .gallery .g1 { grid-column: span 2; }
  .gallery .g2, .gallery .g3, .gallery .g4, .gallery .g5 { grid-column: span 1; grid-row: span 2; }
}

/* Clients strip */
.clients { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px 12px; }
.client {
  font-family: var(--font-head); font-weight: 700; font-size: 0.92rem; color: var(--navy);
  background: #fff; border: 1px solid var(--line); border-radius: 999px; padding: 9px 18px;
}

/* ---------- Calculator ---------- */
.calc { display: grid; grid-template-columns: 1.1fr 1fr; gap: 0; border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-lg); }
.calc-form { background: #fff; padding: 40px; }
.calc-out { background: var(--navy); color: #c9d4e2; padding: 40px; display: flex; flex-direction: column; justify-content: center; }
.calc-out .k { font-family: var(--font-head); font-size: 0.72rem; letter-spacing: .2em; text-transform: uppercase; color: #8fd3d6; font-weight: 700; }
.calc-out .big { font-family: var(--font-head); font-weight: 800; font-size: clamp(2.2rem, 4vw, 3rem); color: var(--green); line-height: 1.1; margin: 6px 0 22px; }
.calc-out .row { display: flex; justify-content: space-between; gap: 16px; padding: 12px 0; border-top: 1px solid rgba(255,255,255,.12); }
.calc-out .row strong { color: #fff; font-family: var(--font-head); }
.calc-out .note { font-size: 0.85rem; color: #9fb0c4; margin: 20px 0 0; }
.field { margin-bottom: 22px; }
.field label { display: flex; justify-content: space-between; font-family: var(--font-head); font-weight: 600; color: var(--navy); font-size: 0.92rem; margin-bottom: 8px; }
.field label output { color: var(--teal); font-weight: 800; }
input[type="range"] { width: 100%; accent-color: var(--teal); height: 28px; }
@media (max-width: 860px) { .calc { grid-template-columns: 1fr; } .calc-form, .calc-out { padding: 28px; } }

/* ---------- Forms ---------- */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px 20px; }
.form-grid .full { grid-column: 1 / -1; }
.form-field label { display: block; font-family: var(--font-head); font-weight: 600; font-size: 0.88rem; color: var(--navy); margin-bottom: 6px; }
.form-field label .opt { font-weight: 400; color: var(--muted); }
.form-field input, .form-field select, .form-field textarea {
  width: 100%; font: inherit; font-size: 1rem; color: var(--ink);
  padding: 12px 14px; border: 1.5px solid var(--line); border-radius: 8px; background: #fff;
  transition: border-color .2s, box-shadow .2s;
}
.form-field textarea { min-height: 120px; resize: vertical; }
.form-field input:focus, .form-field select:focus, .form-field textarea:focus {
  outline: none; border-color: var(--teal); box-shadow: 0 0 0 3px rgba(14,124,133,.15);
}
.form-note { font-size: 0.88rem; color: var(--muted); margin-top: 14px; }
.form-status { margin-top: 16px; padding: 14px 16px; border-radius: 8px; display: none; }
.form-status.ok { display: block; background: var(--green-tint); color: #2f6a14; }
.form-status.err { display: block; background: #fdecec; color: #9b1c1c; }
.hp { position: absolute; left: -9999px; }
@media (max-width: 640px) { .form-grid { grid-template-columns: 1fr; } }

.contact-grid { display: grid; grid-template-columns: 1.4fr 1fr; gap: 48px; align-items: start; }
.contact-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 40px; box-shadow: var(--shadow); }
.contact-aside .item { display: flex; gap: 16px; padding: 20px 0; border-bottom: 1px solid var(--line); }
.contact-aside .item:first-child { padding-top: 0; }
.contact-aside .ic { width: 44px; height: 44px; border-radius: 10px; background: var(--teal-tint); color: var(--teal); display: grid; place-items: center; flex-shrink: 0; }
.contact-aside .ic svg { width: 22px; height: 22px; }
.contact-aside h3 { font-size: 0.8rem; letter-spacing: .16em; text-transform: uppercase; margin-bottom: 4px; }
.contact-aside p { margin: 0; }
.contact-aside a { color: var(--ink); font-weight: 600; }
.contact-aside a:hover { color: var(--teal); }
@media (max-width: 900px) { .contact-grid { grid-template-columns: 1fr; } .contact-card { padding: 28px 22px; } }

/* ---------- FAQ ---------- */
.faq-group { margin-bottom: 48px; }
.faq-group > h2 { font-size: 1.35rem; margin-bottom: 12px; }
.faq { border-bottom: 1px solid var(--line); }
.faq summary {
  list-style: none; cursor: pointer; padding: 20px 44px 20px 0; position: relative;
  font-family: var(--font-head); font-weight: 700; color: var(--navy); font-size: 1.05rem;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: ""; position: absolute; right: 8px; top: 50%; width: 12px; height: 12px;
  border-right: 2.5px solid var(--teal); border-bottom: 2.5px solid var(--teal);
  transform: translateY(-70%) rotate(45deg); transition: transform .2s;
}
.faq[open] summary::after { transform: translateY(-30%) rotate(-135deg); }
.faq .answer { padding: 0 0 22px; max-width: 820px; }
.faq .answer p:last-child { margin-bottom: 0; }
.faq-layout { display: grid; grid-template-columns: 240px 1fr; gap: 56px; align-items: start; }
.faq-nav { position: sticky; top: 110px; }
.faq-nav a { display: block; padding: 8px 0 8px 14px; border-left: 2px solid var(--line); color: var(--muted); font-weight: 600; }
.faq-nav a:hover { color: var(--teal); border-left-color: var(--teal); }
@media (max-width: 860px) { .faq-layout { grid-template-columns: 1fr; } .faq-nav { display: none; } }

/* ---------- CTA band ---------- */
.cta-band {
  background: linear-gradient(120deg, var(--navy) 0%, var(--navy-2) 55%, var(--teal) 130%);
  border-radius: var(--radius-lg); padding: 56px; color: #c9d4e2;
  display: grid; grid-template-columns: 1.4fr auto; gap: 32px; align-items: center;
}
.cta-band h2 { color: #fff; margin-bottom: 10px; }
.cta-band p { margin: 0; }
.cta-band .actions { display: flex; flex-wrap: wrap; gap: 12px; }
@media (max-width: 860px) { .cta-band { grid-template-columns: 1fr; padding: 36px 26px; } }

/* ---------- Comparison ---------- */
.compare { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.compare .col { border-radius: var(--radius-lg); padding: 32px; border: 1px solid var(--line); background: #fff; }
.compare .col.hl { border: 2px solid var(--teal); box-shadow: var(--shadow); }
.compare h3 { display: flex; align-items: center; gap: 10px; }
.compare ul { list-style: none; padding: 0; margin: 0; }
.compare li { padding: 11px 0 11px 30px; border-bottom: 1px solid var(--line); position: relative; }
.compare li:last-child { border-bottom: 0; }
.compare li::before { content: ""; position: absolute; left: 4px; top: 19px; width: 10px; height: 10px; border-radius: 50%; background: #c6ced6; }
.compare .hl li::before { background: var(--green); }
.tag { font-size: 0.7rem; letter-spacing: .12em; text-transform: uppercase; background: var(--green); color: var(--navy); padding: 4px 8px; border-radius: 4px; font-weight: 800; }
@media (max-width: 760px) { .compare { grid-template-columns: 1fr; } }

/* ---------- Footer ---------- */
.site-footer { background: var(--navy-deep); color: #a9b7c8; font-size: 0.98rem; }
.footer-top { display: grid; grid-template-columns: 1.3fr 1fr 1fr 1fr; gap: 40px; padding-top: 72px; padding-bottom: 48px; }
.footer-logo { background: #fff; border-radius: 12px; padding: 14px 18px; display: inline-block; margin-bottom: 18px; }
.footer-logo img { height: 56px; width: auto; }
.site-footer h4 {
  font-size: 0.75rem; letter-spacing: .2em; text-transform: uppercase; color: var(--green); margin-bottom: 16px;
}
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer li { margin-bottom: 8px; }
.site-footer a { color: #d9e2ec; }
.site-footer a:hover { color: var(--green); }
.site-footer address { font-style: normal; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.1); padding-top: 22px; padding-bottom: 28px;
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: 10px 24px; font-size: 0.86rem; color: #8193a8;
}
@media (max-width: 900px) { .footer-top { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .footer-top { grid-template-columns: 1fr; padding-top: 56px; } }

/* ---------- Floating WhatsApp ---------- */
.wa-float {
  position: fixed; right: 20px; bottom: 20px; z-index: 90;
  width: 58px; height: 58px; border-radius: 50%; background: #25d366; color: #fff;
  display: grid; place-items: center; box-shadow: 0 10px 24px rgba(0,0,0,.2);
  transition: transform .2s;
}
.wa-float:hover { transform: scale(1.06); color: #fff; }
.wa-float svg { width: 30px; height: 30px; }

/* ---------- Reveal on scroll ---------- */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .btn, .card, .gallery img { transition: none; }
}

/* ---------- Misc ---------- */
.partner-note { font-size: 0.92rem; color: var(--muted); }
.check-list { list-style: none; padding: 0; margin: 0 0 1.4em; }
.check-list li { padding: 7px 0 7px 32px; position: relative; }
.check-list li::before {
  content: ""; position: absolute; left: 0; top: 11px; width: 20px; height: 20px; border-radius: 50%;
  background: var(--green-tint) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2356a031' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M20 6 9 17l-5-5'/%3E%3C/svg%3E") center / 12px no-repeat;
}
.on-dark .check-list li, .dark .check-list li { color: #d5dfea; }
.mt-0 { margin-top: 0; }
.mt-32 { margin-top: 32px; }
.mt-48 { margin-top: 48px; }
.diagram-inner { position: relative; max-width: 1060px; margin: 0 auto; }
.diagram-label {
  position: absolute; left: 56.2%; top: 40%; transform: translate(-50%, -50%);
  background: var(--navy); color: #fff; font-family: var(--font-head); font-weight: 700;
  font-size: clamp(0.5rem, 1.1vw, 0.75rem); letter-spacing: .14em; text-transform: uppercase;
  padding: .45em .8em; border-radius: 4px; white-space: nowrap;
}

/* ---------- Installation filters ---------- */
.filters { display: flex; flex-wrap: wrap; gap: 12px 20px; align-items: center; margin-bottom: 20px; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  font-family: var(--font-head); font-weight: 600; font-size: 0.85rem; color: var(--navy);
  background: #fff; border: 1.5px solid var(--line); border-radius: 999px; padding: 7px 14px; cursor: pointer;
}
.chip:hover { border-color: var(--teal); }
.chip[aria-pressed="true"] { background: var(--navy); border-color: var(--navy); color: #fff; }
.filter-summary { margin: 0 0 0 auto; color: var(--muted); }
.filter-summary strong { color: var(--teal); font-family: var(--font-head); }
.inst-table td.site .sub { display: block; font-weight: 400; font-size: 0.85rem; color: var(--muted); }
.inst-table { min-width: 720px; }
@media (max-width: 760px) { .filter-summary { margin-left: 0; width: 100%; } }

.season-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.season { background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 28px; }
.season .v { font-family: var(--font-head); font-weight: 800; font-size: 2.4rem; color: var(--teal); line-height: 1; }
.season .k { font-family: var(--font-head); font-weight: 700; color: var(--navy); margin-top: 10px; }
.season .n { color: var(--muted); font-size: 0.92rem; }
@media (max-width: 800px) { .season-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; } .season { padding: 18px; } .season .v { font-size: 1.9rem; } }

/* ---------- PV comparison ---------- */
.vs { display: grid; grid-template-columns: 1fr auto 1fr; gap: 24px; align-items: stretch; }
.vs .side { border-radius: var(--radius-lg); padding: 32px; border: 1px solid var(--line); background: #fff; text-align: center; }
.vs .side.hl { border: 2px solid var(--teal); box-shadow: var(--shadow); }
.vs .big { font-family: var(--font-head); font-weight: 800; font-size: clamp(2.4rem, 5vw, 3.4rem); color: var(--navy); line-height: 1.05; }
.vs .hl .big { color: var(--teal); }
.vs .mid { align-self: center; font-family: var(--font-head); font-weight: 800; color: var(--muted); }
.vs ul { list-style: none; padding: 0; margin: 20px 0 0; text-align: left; }
.vs li { padding: 9px 0; border-top: 1px solid var(--line); }
@media (max-width: 760px) { .vs { grid-template-columns: 1fr; } .vs .mid { text-align: center; } }

/* ---------- Spec text box ---------- */
.sor { background: var(--bg-soft); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px 24px; font-size: 0.95rem; color: var(--ink); }
.sor-actions { display: flex; gap: 12px; align-items: center; margin-top: 14px; flex-wrap: wrap; }
.copy-ok { color: var(--green-dark); font-weight: 600; }