/* Oakvolt Energy Trust — site stylesheet
   Palette
   --green      #1F4D3A  primary
   --green-deep #143427  header bar, footer
   --green-pale #E9EFE9  section ground
   --brass      #A97F2A  accent rules, small marks
   --ink        #1B2420  text
   --rule       #C5CFC7  borders
*/

:root {
  --green: #1F4D3A;
  --green-deep: #143427;
  --green-pale: #E9EFE9;
  --green-mid: #3C6E58;
  --brass: #A97F2A;
  --ink: #1B2420;
  --ink-soft: #46524B;
  --rule: #C5CFC7;
  --paper: #FFFFFF;
  --ground: #F3F5F2;
  --serif: "Libre Baskerville", "Baskerville", Georgia, "Times New Roman", serif;
  --sans: "Source Sans 3", "Source Sans Pro", "Helvetica Neue", Arial, sans-serif;
  --measure: 66ch;
  --wrap: 1140px;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--sans);
  font-size: 18px;
  line-height: 1.55;
  color: var(--ink);
  background: var(--ground);
}
img, svg { max-width: 100%; height: auto; }
a { color: var(--green); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--green-deep); }
:focus-visible { outline: 3px solid var(--brass); outline-offset: 2px; }

h1, h2, h3, h4 {
  font-family: var(--serif);
  font-weight: 400;
  line-height: 1.2;
  color: var(--green-deep);
  margin: 0 0 .5em;
}
h1 { font-size: clamp(2rem, 4.2vw, 3rem); }
h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); }
h3 { font-size: 1.3rem; }
h4 { font-size: 1.1rem; font-family: var(--sans); font-weight: 600; color: var(--ink); }
p { margin: 0 0 1em; max-width: var(--measure); }
ul, ol { padding-left: 1.3em; max-width: var(--measure); }
li { margin-bottom: .35em; }
strong { font-weight: 600; }
small, .small { font-size: .88rem; }

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 24px; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--brass); color: #fff; padding: 8px 12px; z-index: 100; }
.skip:focus { left: 8px; }

/* ---------- Top bar ---------- */
.topbar {
  background: var(--green-deep);
  color: #DCE5DD;
  font-size: .85rem;
}
.topbar .wrap { display: flex; justify-content: space-between; align-items: center; min-height: 34px; gap: 16px; }
.topbar a { color: #DCE5DD; text-decoration: none; }
.topbar a:hover { text-decoration: underline; }
.topbar .lang a[aria-current="page"] { color: #fff; font-weight: 600; text-decoration: underline; }
.topbar .lang span { opacity: .5; margin: 0 6px; }

/* ---------- Header ---------- */
.site-header {
  background: var(--paper);
  border-bottom: 4px double var(--green);
}
.site-header .wrap {
  display: flex; align-items: center; justify-content: space-between;
  gap: 24px; min-height: 92px; flex-wrap: wrap;
}
.brand { display: inline-flex; align-items: center; gap: 14px; text-decoration: none; color: var(--green-deep); }
.brand svg { width: 44px; height: 44px; flex: none; }
.brand .word { font-family: var(--serif); font-size: 1.35rem; letter-spacing: .02em; line-height: 1; }
.brand .word small { display: block; font-family: var(--sans); font-size: .72rem; letter-spacing: .12em; color: var(--brass); margin-top: 5px; text-transform: uppercase; }

.nav ul { list-style: none; margin: 0; padding: 0; display: flex; gap: 4px; flex-wrap: wrap; }
.nav a {
  display: block; padding: 10px 12px; text-decoration: none; color: var(--ink);
  font-size: 1rem; border-bottom: 3px solid transparent;
}
.nav a:hover { border-bottom-color: var(--rule); }
.nav a[aria-current="page"] { border-bottom-color: var(--brass); color: var(--green-deep); font-weight: 600; }
.nav-toggle { display: none; }

@media (max-width: 860px) {
  .site-header .wrap { min-height: 72px; }
  .nav-toggle {
    display: inline-block; background: none; border: 1px solid var(--green); color: var(--green);
    font: inherit; padding: 6px 12px; cursor: pointer;
  }
  .nav { display: none; width: 100%; border-top: 1px solid var(--rule); }
  .nav.open { display: block; }
  .nav ul { flex-direction: column; gap: 0; padding: 8px 0; }
  .nav a { padding: 10px 4px; border-bottom: 1px solid var(--rule); }
  .nav a[aria-current="page"] { border-left: 3px solid var(--brass); padding-left: 10px; }
  .topbar .tagline { display: none; }
}

/* ---------- Hero ---------- */
.hero { background: var(--green-pale); border-bottom: 1px solid var(--rule); padding: 56px 0; }
.hero .wrap { display: grid; grid-template-columns: 1.05fr 1fr; gap: 48px; align-items: center; }
.hero h1 { margin-bottom: .6em; }
.hero .lead { font-size: 1.15rem; color: var(--ink-soft); }
.hero .figure { background: var(--paper); border: 1px solid var(--rule); padding: 18px; }
.hero .figure figcaption { font-size: .85rem; color: var(--ink-soft); border-top: 1px solid var(--rule); margin-top: 12px; padding-top: 10px; }
.hero-sub { padding: 40px 0; }
.hero-sub .wrap { grid-template-columns: 1fr; }
.hero-sub h1 { margin-bottom: .3em; }
@media (max-width: 860px) {
  .hero { padding: 36px 0; }
  .hero .wrap { grid-template-columns: 1fr; gap: 28px; }
}

.btn {
  display: inline-block; padding: 12px 22px; font-size: 1rem; font-weight: 600;
  text-decoration: none; border: 2px solid var(--green); color: var(--green); background: transparent;
  font-family: var(--sans); cursor: pointer; line-height: 1.2;
}
.btn.primary { background: var(--green); color: #fff; }
.btn.primary:hover { background: var(--green-deep); border-color: var(--green-deep); }
.btn:hover { background: rgba(31,77,58,.06); }
.btn + .btn { margin-left: 10px; }
.actions { margin-top: 24px; display: flex; flex-wrap: wrap; gap: 10px; }
.actions .btn + .btn { margin-left: 0; }

/* ---------- Sections ---------- */
.section { padding: 64px 0; }
.section.alt { background: var(--paper); border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule); }
.section.tint { background: var(--green-pale); border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule); }
.section-head { margin-bottom: 32px; }
.section-head h2::after {
  content: ""; display: block; width: 56px; height: 3px; background: var(--brass); margin-top: 14px;
}
.section-head p { font-size: 1.1rem; color: var(--ink-soft); }
.intro { font-size: 1.15rem; }
@media (max-width: 860px) { .section { padding: 44px 0; } }

.grid { display: grid; gap: 24px; }
.grid.two { grid-template-columns: repeat(2, 1fr); }
.grid.three { grid-template-columns: repeat(3, 1fr); }
.grid.four { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 960px) { .grid.four { grid-template-columns: repeat(2, 1fr); } .grid.three { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .grid.two, .grid.three, .grid.four { grid-template-columns: 1fr; } }

.panel {
  background: var(--paper); border: 1px solid var(--rule); border-top: 3px solid var(--green);
  padding: 26px 26px 20px;
}
.panel h3 { margin-top: 0; }
.panel p:last-child, .panel ul:last-child { margin-bottom: 0; }
.panel .icon { width: 44px; height: 44px; margin-bottom: 14px; color: var(--green); }
.tint .panel { border-top-color: var(--brass); }

.split { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }
@media (max-width: 860px) { .split { grid-template-columns: 1fr; gap: 28px; } }

/* Definition-style key facts */
.facts { list-style: none; padding: 0; margin: 0; max-width: none; }
.facts li { display: flex; justify-content: space-between; gap: 16px; padding: 10px 0; border-bottom: 1px solid var(--rule); margin: 0; }
.facts li:first-child { border-top: 1px solid var(--rule); }
.facts .k { color: var(--ink-soft); }
.facts .v { font-weight: 600; text-align: right; }

/* Steps (a real sequence) */
.steps { list-style: none; padding: 0; margin: 0; max-width: none; counter-reset: step; display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; border: 1px solid var(--rule); background: var(--paper); }
.steps li { counter-increment: step; padding: 24px; border-right: 1px solid var(--rule); margin: 0; }
.steps li:last-child { border-right: 0; }
.steps li::before {
  content: counter(step, decimal-leading-zero);
  font-family: var(--serif); color: var(--brass); font-size: 1.1rem; display: block; margin-bottom: 8px;
}
.steps h3 { font-size: 1.15rem; }
.steps p { font-size: .95rem; margin: 0; color: var(--ink-soft); }
@media (max-width: 960px) { .steps { grid-template-columns: repeat(2, 1fr); } .steps li:nth-child(2) { border-right: 0; } .steps li:nth-child(-n+2) { border-bottom: 1px solid var(--rule); } }
@media (max-width: 560px) { .steps { grid-template-columns: 1fr; } .steps li { border-right: 0; border-bottom: 1px solid var(--rule); } .steps li:last-child { border-bottom: 0; } }

/* Figures strip */
.figures { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.figures div { border-left: 3px solid var(--brass); padding-left: 16px; }
.figures .num { font-family: var(--serif); font-size: 2rem; color: var(--green-deep); line-height: 1.1; }
.figures .lab { color: var(--ink-soft); font-size: .95rem; }
@media (max-width: 860px) { .figures { grid-template-columns: repeat(2, 1fr); } }

/* Two doors */
.doors { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.door { background: var(--green-deep); color: #E4ECE5; padding: 34px; }
.door h3 { color: #fff; }
.door p { color: #C9D6CC; }
.door a.btn { border-color: #fff; color: #fff; }
.door a.btn:hover { background: rgba(255,255,255,.1); }
.door.brass { background: var(--green); }
@media (max-width: 760px) { .doors { grid-template-columns: 1fr; } }

/* Tables */
.table-wrap { overflow-x: auto; border: 1px solid var(--rule); background: var(--paper); }
table { border-collapse: collapse; width: 100%; font-size: .97rem; }
th, td { text-align: left; padding: 12px 14px; border-bottom: 1px solid var(--rule); vertical-align: top; }
th { background: var(--green-deep); color: #fff; font-weight: 600; white-space: nowrap; }
tbody tr:nth-child(even) { background: #F7F9F6; }
tbody tr:last-child td { border-bottom: 0; }
td.stage { white-space: nowrap; }
.tag { display: inline-block; border: 1px solid var(--green-mid); color: var(--green-deep); padding: 1px 8px; font-size: .82rem; }

/* Quote / statement */
.statement {
  border-left: 4px solid var(--brass); padding: 8px 0 8px 24px; margin: 32px 0;
  font-family: var(--serif); font-size: 1.35rem; line-height: 1.4; color: var(--green-deep); max-width: 40ch;
}

/* Notices */
.notice { background: var(--paper); border: 1px solid var(--rule); border-left: 4px solid var(--brass); padding: 18px 22px; font-size: .95rem; color: var(--ink-soft); }
.notice p:last-child { margin-bottom: 0; }

/* People */
.people { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.person { background: var(--paper); border: 1px solid var(--rule); padding: 22px; }
.person .portrait { width: 100%; aspect-ratio: 4/5; background: var(--green-pale); border: 1px solid var(--rule); display: flex; align-items: center; justify-content: center; color: var(--ink-soft); font-size: .85rem; margin-bottom: 16px; text-align: center; padding: 12px; }
.person h3 { font-size: 1.15rem; margin-bottom: .2em; }
.person .role { color: var(--brass); font-size: .9rem; margin-bottom: .8em; }
.person p { font-size: .95rem; margin: 0; }
@media (max-width: 860px) { .people { grid-template-columns: 1fr; } }

/* Regions list */
.regions { list-style: none; padding: 0; margin: 0; max-width: none; columns: 2; column-gap: 32px; }
.regions li { break-inside: avoid; border-bottom: 1px solid var(--rule); padding: 10px 0; margin: 0; }
.regions li strong { display: block; }
.regions li span { color: var(--ink-soft); font-size: .95rem; }
@media (max-width: 640px) { .regions { columns: 1; } }

/* Contact / forms */
.form { background: var(--paper); border: 1px solid var(--rule); padding: 32px; }
.form .row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
@media (max-width: 640px) { .form .row { grid-template-columns: 1fr; } }
.field { margin-bottom: 18px; }
.field label { display: block; font-weight: 600; margin-bottom: 6px; font-size: .95rem; }
.field input, .field select, .field textarea {
  width: 100%; font: inherit; padding: 10px 12px; border: 1px solid #9AA89E; background: #fff; color: var(--ink);
}
.field textarea { min-height: 150px; resize: vertical; }
.field input:focus, .field select:focus, .field textarea:focus { border-color: var(--green); outline: 2px solid var(--green); outline-offset: 0; }
.field.check { display: flex; gap: 10px; align-items: flex-start; }
.field.check input { width: auto; margin-top: 5px; }
.field.check label { font-weight: 400; margin: 0; }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.form-note { font-size: .88rem; color: var(--ink-soft); }
.alert { display: none; border: 1px solid #B0413E; border-left-width: 4px; background: #FBF1F0; color: #6B1F1D; padding: 14px 18px; margin-bottom: 20px; }
.alert.show { display: block; }

.addr { font-style: normal; line-height: 1.6; }
.addr strong { display: block; color: var(--green-deep); }

/* Legal text */
.legal p, .legal li { max-width: 72ch; }
.legal h2 { font-size: 1.4rem; margin-top: 2em; }
.legal h3 { font-size: 1.1rem; margin-top: 1.5em; }

/* ---------- Footer ---------- */
.site-footer { background: var(--green-deep); color: #C9D6CC; padding: 56px 0 28px; font-size: .95rem; margin-top: 0; border-top: 6px solid var(--green); }
.site-footer a { color: #E4ECE5; }
.site-footer .cols { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 32px; }
.site-footer h4 { color: #fff; font-family: var(--serif); font-weight: 400; font-size: 1.05rem; margin-bottom: 12px; }
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer li { margin-bottom: 6px; }
.site-footer .addr strong { color: #fff; }
.site-footer .brand { color: #fff; margin-bottom: 14px; }
.site-footer .brand .word small { color: #D9B45E; }
.site-footer .risk { border-top: 1px solid rgba(255,255,255,.18); margin-top: 40px; padding-top: 22px; font-size: .85rem; color: #A9BBAE; max-width: none; }
.site-footer .risk p { max-width: none; }
.site-footer .bottom { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; margin-top: 18px; font-size: .85rem; }
.site-footer .bottom ul { display: flex; gap: 18px; flex-wrap: wrap; }
@media (max-width: 860px) { .site-footer .cols { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .site-footer .cols { grid-template-columns: 1fr; } }

/* Diagram */
.diagram { background: var(--paper); border: 1px solid var(--rule); padding: 24px; }
.diagram svg { display: block; width: 100%; height: auto; }
.diagram figcaption { font-size: .88rem; color: var(--ink-soft); margin-top: 12px; }

@media print {
  .topbar, .nav-toggle, .site-footer .risk { display: none; }
  body { background: #fff; }
}

/* ---------- Language flags ---------- */
.lang-flag { width: 24px; height: 16px; vertical-align: middle; border: none; border-radius: 0; flex: none; }
.topbar .lang { display: flex; align-items: center; gap: 0; }
.topbar .lang a { display: inline-flex; align-items: center; }
.topbar .lang > span { line-height: 1; }
.bottom .lang-flag { border: none; }