/* =========================================================
   Xcellera Energy — shared styles
   Editorial layout: serif headings, warm paper background,
   thin rules instead of boxes, mint used as an accent only.
   ========================================================= */

:root {
  --paper: #f6f1e7;           /* page background */
  --paper-2: #fbf8f2;         /* form fields, notes */
  --ink: #1f1c17;             /* main text */
  --ink-2: #4f4940;           /* secondary text */
  --ink-3: #6e665a;           /* small print */
  --rule: rgba(31, 28, 23, 0.16);
  --rule-strong: rgba(31, 28, 23, 0.32);

  --green: #0f3d22;           /* buttons, links */
  --mint: #91ff99;            /* brand accent: highlights, hover, selected */
  --danger: #a3261b;

  --serif: "Newsreader", Georgia, "Times New Roman", serif;
  --sans: "Public Sans", system-ui, -apple-system, "Segoe UI", sans-serif;

  --wrap: 1120px;
  --gutter: clamp(16px, 4vw, 32px);
}

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img, svg { display: block; max-width: 100%; }

h1, h2, h3 {
  font-family: var(--serif);
  font-weight: 400;
  line-height: 1.12;
  letter-spacing: -0.01em;
  margin: 0 0 0.5em;
}
h1 { font-size: clamp(2.4rem, 5.4vw, 3.9rem); }
h2 { font-size: clamp(1.7rem, 3vw, 2.3rem); }
h3 { font-size: 1.35rem; margin-bottom: 0.3em; }
p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }

a { color: var(--green); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { text-decoration-color: var(--mint); text-decoration-thickness: 3px; }

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.lead { font-size: 1.2rem; color: var(--ink-2); max-width: 36em; }
.muted { color: var(--ink-2); }
.small { font-size: 0.88rem; color: var(--ink-3); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  padding: 12px 22px;
  border-radius: 3px;
  background: var(--green);
  color: var(--paper);
  font-family: var(--sans);
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid var(--green);
  cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}
.btn:hover { background: var(--mint); border-color: var(--mint); color: var(--ink); text-decoration: none; }
.btn:disabled { opacity: 0.6; cursor: progress; }

.actions { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 20px; margin-top: 28px; }
.or { color: var(--ink-2); }

/* ---------- Header ---------- */
.site-header { border-bottom: 1px solid var(--rule); position: relative; }
.site-header__inner { display: flex; align-items: center; gap: 28px; min-height: 76px; }

.logo { display: inline-flex; align-items: center; gap: 12px; color: var(--ink); text-decoration: none; margin-right: auto; }
.logo:hover { text-decoration: none; }
.logo__mark {
  width: 30px; height: 30px;
  border-radius: 6px;
  background: var(--green);
  display: grid;
  place-items: center;
  flex-shrink: 0;
}
.logo__mark::after { content: ""; width: 14px; height: 4px; border-radius: 2px; background: var(--mint); }
.logo__name { font-family: var(--serif); font-size: 1.3rem; line-height: 1.1; }

.nav { display: flex; gap: 26px; }
.nav__link { color: var(--ink); text-decoration: none; font-size: 0.98rem; padding: 4px 0; border-bottom: 3px solid transparent; }
.nav__link:hover { text-decoration: none; border-bottom-color: var(--rule-strong); }
.nav__link.is-active { border-bottom-color: var(--mint); }
.nav__link--quote { display: none; }

.nav-toggle {
  display: none;
  width: 44px; height: 44px;
  border: 1px solid var(--rule-strong);
  border-radius: 3px;
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  align-items: center;
  justify-content: center;
}
.nav-toggle svg { width: 22px; height: 22px; }

@media (max-width: 900px) {
  .nav-toggle { display: inline-flex; }
  .nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    z-index: 20;
    flex-direction: column;
    gap: 0;
    padding: 8px var(--gutter) 20px;
    background: var(--paper);
    border-bottom: 1px solid var(--rule);
    box-shadow: 0 18px 30px -20px rgba(31, 28, 23, 0.35);
  }
  .nav.is-open { display: flex; }
  .nav__link { padding: 14px 0; border-bottom: 1px solid var(--rule); font-size: 1.05rem; }
  .nav__link.is-active { border-bottom-color: var(--rule); box-shadow: inset 4px 0 0 var(--mint); padding-left: 14px; }
}
@media (max-width: 560px) {
  .header-quote { display: none; }
  .nav__link--quote { display: block; font-weight: 600; }
  .logo__name { font-size: 1.15rem; }
}

/* ---------- Page structure ---------- */
.hero { padding: clamp(48px, 8vw, 96px) 0 clamp(56px, 8vw, 96px); }
.hero__grid { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: clamp(32px, 6vw, 80px); align-items: center; }
.hero__art { margin: 0; }
@media (max-width: 860px) {
  .hero__grid { grid-template-columns: 1fr; }
  .hero__art { max-width: 460px; }
}

.page-head { padding: clamp(48px, 7vw, 88px) 0 clamp(36px, 5vw, 56px); }
.page-head h1 { max-width: 14em; }

.section { padding: clamp(48px, 7vw, 80px) 0; border-top: 1px solid var(--rule); }

/* Heading on the left, content on the right */
.split { display: grid; grid-template-columns: 1fr 2fr; gap: clamp(20px, 5vw, 64px); }
.split > :first-child h2 { position: sticky; top: 24px; }
@media (max-width: 760px) {
  .split { grid-template-columns: 1fr; }
  .split > :first-child h2 { position: static; }
}

/* ---------- Rows: ruled list of title + text ---------- */
.rows { list-style: none; margin: 0; padding: 0; border-bottom: 1px solid var(--rule); }
.rows > li { display: grid; grid-template-columns: 15em 1fr; gap: 8px 32px; padding: 22px 0; border-top: 1px solid var(--rule); }
.rows h3 { margin: 0; font-size: 1.3rem; }
.rows h3 a { color: var(--ink); text-decoration: none; }
.rows h3 a:hover { text-decoration: underline; text-decoration-color: var(--mint); text-decoration-thickness: 3px; }
.rows p { color: var(--ink-2); }
.split .rows > li { grid-template-columns: 12em 1fr; }
@media (max-width: 900px) {
  .rows > li,
  .split .rows > li { grid-template-columns: 1fr; }
}

/* ---------- Lists ---------- */
.list { margin: 18px 0 0; padding: 0 0 0 1.1em; color: var(--ink-2); }
.list li { margin-bottom: 6px; padding-left: 4px; }
.list li::marker { color: var(--green); }
.list--cols { columns: 2; column-gap: 40px; }
.list--cols li { break-inside: avoid; }
@media (max-width: 600px) { .list--cols { columns: 1; } }

.jump { display: flex; flex-wrap: wrap; gap: 6px 22px; margin-top: 24px; font-size: 0.95rem; }

/* ---------- Numbered steps ---------- */
.steps { list-style: none; margin: 0; padding: 0; counter-reset: step; }
.steps > li { counter-increment: step; display: grid; grid-template-columns: 3rem 1fr; gap: 0 12px; padding: 20px 0; border-top: 1px solid var(--rule); }
.steps > li:last-child { border-bottom: 1px solid var(--rule); }
.steps > li::before { content: counter(step); font-family: var(--serif); font-size: 1.9rem; line-height: 1; color: var(--green); }
.steps h3 { font-size: 1.25rem; }
.steps p { color: var(--ink-2); }

/* ---------- Comparison table ---------- */
.compare { width: 100%; border-collapse: collapse; margin-top: 28px; font-size: 0.98rem; }
.compare caption { text-align: left; font-family: var(--serif); font-size: 1.25rem; margin-bottom: 10px; }
.compare th,
.compare td { text-align: left; padding: 12px 12px 12px 0; border-top: 1px solid var(--rule); vertical-align: top; }
.compare thead th { font-family: var(--sans); font-size: 0.82rem; font-weight: 600; color: var(--ink-3); border-top: 0; padding-top: 0; }
.compare tbody th { font-weight: 500; }
.compare td { color: var(--ink-2); }
.compare tbody tr:last-child > * { border-bottom: 1px solid var(--rule); }
.compare td.is-better { color: var(--ink); }

/* ---------- Note (highlighted aside) ---------- */
.note {
  background: var(--paper-2);
  border-left: 6px solid var(--mint);
  padding: 26px 30px;
  max-width: 46em;
}
.note h3 { margin-bottom: 8px; }
.note p { color: var(--ink-2); }

/* ---------- Call to action ---------- */
.cta__inner { display: grid; grid-template-columns: 1fr 1.3fr; gap: clamp(20px, 5vw, 64px); align-items: start; }
.cta h2 { font-size: clamp(2rem, 4vw, 2.9rem); }
.cta p { color: var(--ink-2); }
@media (max-width: 760px) { .cta__inner { grid-template-columns: 1fr; } }

/* ---------- FAQ ---------- */
.faq { border-bottom: 1px solid var(--rule); }
.faq details { border-top: 1px solid var(--rule); }
.faq summary {
  cursor: pointer;
  list-style: none;
  padding: 18px 40px 18px 0;
  font-family: var(--serif);
  font-size: 1.25rem;
  position: relative;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 4px; top: 50%; transform: translateY(-50%); font-family: var(--sans); font-size: 1.4rem; color: var(--green); }
.faq details[open] summary::after { content: "−"; }
.faq details > div { padding: 0 0 22px; color: var(--ink-2); max-width: 40em; }

/* ---------- Long-form text (privacy, accessibility) ---------- */
.prose { max-width: 42em; }
.prose h2 { font-size: 1.6rem; margin-top: 1.8em; }
.prose h2:first-child { margin-top: 0; }
.prose p,
.prose li { color: var(--ink-2); }
.prose ul { padding-left: 1.2em; }

/* ---------- Forms ---------- */
.contact-grid { display: grid; grid-template-columns: 2fr 1fr; gap: clamp(32px, 6vw, 80px); align-items: start; }
.contact-grid aside h2 { font-size: 1.5rem; }
.contact-grid aside p { color: var(--ink-2); }
.contact-grid aside .section-label { margin-top: 28px; }
@media (max-width: 860px) { .contact-grid { grid-template-columns: 1fr; } }

.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.field { display: flex; flex-direction: column; gap: 6px; }
.field--full { grid-column: 1 / -1; }
.field label,
.field .label { font-size: 0.92rem; font-weight: 600; }
.field .opt { color: var(--ink-3); font-weight: 400; }
.field input,
.field select,
.field textarea {
  width: 100%;
  background: var(--paper-2);
  border: 1px solid var(--rule-strong);
  border-radius: 3px;
  padding: 11px 12px;
  color: var(--ink);
  font: inherit;
  font-size: 1rem;
}
.field textarea { min-height: 140px; resize: vertical; }
.field input::placeholder,
.field textarea::placeholder { color: #9a9284; }
.field input:focus,
.field select:focus,
.field textarea:focus { outline: 2px solid var(--green); outline-offset: 0; border-color: var(--green); }
.field.has-error input,
.field.has-error select,
.field.has-error textarea { border-color: var(--danger); }
.field__error { display: none; font-size: 0.85rem; color: var(--danger); }
.field.has-error .field__error { display: block; }
@media (max-width: 600px) { .form-grid { grid-template-columns: 1fr; } }

.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip { position: relative; }
.chip input { position: absolute; inset: 0; width: 100%; height: 100%; margin: 0; opacity: 0; pointer-events: none; }
.chip span {
  display: inline-block;
  padding: 7px 14px;
  border: 1px solid var(--rule-strong);
  border-radius: 3px;
  font-size: 0.92rem;
  cursor: pointer;
}
.chip span:hover { border-color: var(--ink); }
.chip input:checked + span { background: var(--mint); border-color: var(--ink); }
.chip input:focus-visible + span { outline: 2px solid var(--green); outline-offset: 2px; }

.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.form-error { margin: 0 0 4px; padding: 12px 14px; border-left: 4px solid var(--danger); background: rgba(163, 38, 27, 0.07); color: var(--danger); }
.form-note { font-size: 0.88rem; color: var(--ink-3); margin-top: 10px; }

.form-success { display: none; padding: 8px 0; }
.form-success.is-visible { display: block; }
.form-success h2 { font-size: 1.8rem; }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--rule); padding: 48px 0 32px; font-size: 0.95rem; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1.2fr; gap: 32px; }
.footer-name { font-family: var(--serif); font-size: 1.3rem; margin-bottom: 8px; }
.site-footer p { color: var(--ink-2); }
.footer-links { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; }
.footer-links a { color: var(--ink); text-decoration: none; }
.footer-links a:hover { text-decoration: underline; text-decoration-color: var(--mint); text-decoration-thickness: 3px; }
.site-footer .footer-notice { margin: 32px 0 0; max-width: 46em; font-size: 0.85rem; color: var(--ink-3); }
.footer-bottom { margin-top: 20px; padding-top: 20px; border-top: 1px solid var(--rule); display: flex; flex-wrap: wrap; gap: 8px 20px; font-size: 0.85rem; color: var(--ink-3); }
.footer-bottom a { color: var(--ink-3); }
@media (max-width: 760px) { .footer-grid { grid-template-columns: 1fr; gap: 24px; } }

/* ---------- Utilities ---------- */
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); border: 0; }
.sr-only:focus { position: fixed; top: 8px; left: 8px; width: auto; height: auto; padding: 10px 16px; margin: 0; clip: auto; z-index: 100; background: var(--mint); color: var(--ink); }
:focus-visible { outline: 2px solid var(--green); outline-offset: 3px; }