/* ============================================================
   Ampere Solar — bold, dark, amber. Mobile-first.
   ============================================================ */

:root {
  --ink: #f4f6f8;
  --ink-dim: #98a4b3;
  --bg: #0b0f14;
  --surface: #131a22;
  --surface-2: #1a232d;
  --line: rgba(148, 176, 210, 0.16);
  --accent: #fbbf24;
  --accent-hot: #f59e0b;
  --accent-ink: #150f02;

  --shadow: 0 22px 60px rgba(0, 0, 0, 0.55);
  --radius: 14px;

  --step: clamp(3.5rem, 9vw, 7rem);
  --shell: 76rem;

  --display: "Haettenschweiler", "Arial Narrow Bold", "Impact", "Avenir Next Condensed",
             "Helvetica Neue", sans-serif;
  --sans: "Avenir Next", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", "Cascadia Mono", Consolas, monospace;

  --t-fast: 180ms cubic-bezier(.2, .7, .3, 1);
  --t: 340ms cubic-bezier(.2, .7, .3, 1);   /* bold: decisive, 300-450ms */
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 400 16px/1.65 var(--sans);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3 { margin: 0 0 .5em; line-height: 1.02; }
p { margin: 0 0 1.1rem; }
a { color: var(--accent); }
img { max-width: 100%; display: block; }

.shell { width: min(100% - 2.5rem, var(--shell)); margin-inline: auto; }
.shell.narrow { width: min(100% - 2.5rem, 46rem); }
section { padding-block: var(--step); }

.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 100;
  background: var(--accent); color: var(--accent-ink);
  padding: .7rem 1.1rem; font-weight: 700; border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; }

:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

/* ---------- scroll progress ---------- */
.scroll-progress {
  position: fixed; inset: 0 0 auto 0; height: 3px; z-index: 60;
  background: transparent; pointer-events: none;
}
.scroll-progress span {
  display: block; height: 100%; width: 100%;
  background: linear-gradient(90deg, var(--accent-hot), var(--accent));
  transform: scaleX(0); transform-origin: 0 50%;
}

/* ---------- header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--t-fast), background var(--t-fast);
}
.site-header.scrolled {
  border-bottom-color: var(--line);
  background: color-mix(in srgb, var(--bg) 94%, transparent);
}
.site-header .shell {
  display: flex; align-items: center; gap: 1.2rem; padding-block: .9rem;
}
.logo {
  display: inline-flex; align-items: center; gap: .5rem;
  color: var(--accent); text-decoration: none;
  font: 700 1.12rem/1 var(--sans); letter-spacing: -.02em;
}
.logo span { color: var(--ink); }
.logo b { color: var(--accent); font-weight: 700; }

.site-header nav { display: none; margin-left: auto; gap: 1.6rem; }
.site-header nav a {
  color: var(--ink-dim); text-decoration: none; font-size: .93rem; font-weight: 500;
  transition: color var(--t-fast);
}
.site-header nav a:hover { color: var(--ink); }

.header-cta {
  display: none;
  background: var(--accent); color: var(--accent-ink);
  text-decoration: none; font-weight: 700; font-size: .9rem;
  padding: .62rem 1.1rem; border-radius: 999px;
  transition: transform var(--t-fast), background var(--t-fast);
}
.header-cta:hover { background: var(--accent-hot); transform: translateY(-1px); }

.nav-toggle {
  margin-left: auto; width: 44px; height: 44px; display: grid; place-content: center; gap: 5px;
  background: transparent; border: 1px solid var(--line); border-radius: 10px; cursor: pointer;
}
.nav-toggle span {
  display: block; width: 18px; height: 2px; background: var(--ink); border-radius: 2px;
  transition: transform var(--t-fast), opacity var(--t-fast);
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 799px) {
  .site-header nav {
    position: absolute; left: 0; right: 0; top: 100%;
    display: grid; gap: .25rem; padding: 1rem 1.25rem 1.4rem;
    background: var(--surface); border-bottom: 1px solid var(--line);
    transform: translateY(-8px); opacity: 0; visibility: hidden;
    transition: opacity var(--t-fast), transform var(--t-fast), visibility var(--t-fast);
  }
  .site-header nav.open { opacity: 1; visibility: visible; transform: none; }
  .site-header nav a { padding: .65rem .2rem; font-size: 1.02rem; border-bottom: 1px solid var(--line); }
}
@media (min-width: 800px) {
  .site-header nav { display: flex; }
  .header-cta { display: inline-block; }
  .nav-toggle { display: none; }
}

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: .5rem;
  padding: .95rem 1.6rem; border-radius: 999px; border: 0;
  font: 700 1rem/1 var(--sans); text-decoration: none; cursor: pointer;
  transition: transform var(--t-fast), background var(--t-fast), border-color var(--t-fast);
}
.btn:active { transform: translateY(1px) scale(.99); }
.btn-solid { background: var(--accent); color: var(--accent-ink); }
.btn-solid:hover { background: var(--accent-hot); }
.btn-ghost { background: transparent; color: var(--ink); border: 1.5px solid var(--line); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }
.btn .arw { transition: transform var(--t-fast); }
.btn:hover .arw { transform: translateX(5px); }

/* ---------- hero ---------- */
.hero { position: relative; padding-block: clamp(3.5rem, 11vh, 7.5rem) var(--step); overflow: hidden; }
.hero-glow {
  position: absolute; inset: -30% -10% auto -10%; height: 70vh; pointer-events: none;
  background:
    radial-gradient(48rem 26rem at 72% 8%, rgba(251, 191, 36, .16), transparent 62%),
    radial-gradient(34rem 24rem at 8% 40%, rgba(245, 158, 11, .09), transparent 60%);
}
.hero-inner { position: relative; }
.hero-eyebrow {
  font: 600 .74rem/1 var(--mono); letter-spacing: .22em; text-transform: uppercase;
  color: var(--accent); margin-bottom: 1.4rem;
}
.hero h1 {
  font-family: var(--display);
  font-size: clamp(3.1rem, 12vw, 8rem);
  font-weight: 400;
  letter-spacing: -.02em;
  text-transform: uppercase;
  margin-bottom: 1.4rem;
}
.hero h1 .hl {
  position: relative; display: inline-block;
  background: linear-gradient(100deg, var(--accent) 20%, #fde68a 50%, var(--accent-hot) 80%);
  background-size: 220% auto;
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}
.hero-lede {
  font-size: clamp(1.05rem, 2.1vw, 1.3rem); color: var(--ink-dim);
  max-width: 42ch; margin-bottom: 2.2rem;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: .8rem; }

.stats {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(9rem, 1fr));
  gap: 1px; margin: 3.4rem 0 0; padding: 0;
  background: var(--line); border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden;
}
.stats > div { background: var(--bg); padding: 1.5rem 1.3rem; }
.stats dt {
  font: 600 .68rem/1.3 var(--mono); letter-spacing: .14em; text-transform: uppercase;
  color: var(--ink-dim); margin-bottom: .5rem;
}
.stats dd { margin: 0; font-family: var(--display); font-size: clamp(2rem, 4.5vw, 2.9rem); color: var(--accent); }

/* ---------- marquee ---------- */
.marquee {
  border-block: 1px solid var(--line); background: var(--surface);
  overflow: hidden; padding-block: .85rem;
}
.marquee-track {
  display: flex; gap: 1.6rem; width: max-content;
  font: 600 .82rem/1 var(--mono); letter-spacing: .16em; text-transform: uppercase;
  color: var(--ink-dim); white-space: nowrap;
  animation: slide 34s linear infinite;
}
.marquee-track span:nth-child(even) { color: var(--accent); }
.marquee:hover .marquee-track { animation-play-state: paused; }
@keyframes slide { to { transform: translateX(-50%); } }

/* ---------- generic section head ---------- */
.sec-head { max-width: 46rem; margin-bottom: 2.8rem; }
.sec-head h2, .split h2 {
  font-family: var(--display); font-weight: 400; text-transform: uppercase;
  font-size: clamp(2rem, 5.5vw, 3.6rem); letter-spacing: -.01em;
}
.sec-head p { color: var(--ink-dim); font-size: 1.04rem; }

/* ---------- split sections ---------- */
.split { display: grid; gap: clamp(2rem, 5vw, 4rem); }
@media (min-width: 900px) { .split { grid-template-columns: 1.05fr .95fr; align-items: start; } }
.split p { color: var(--ink-dim); }

.pull {
  margin: 0 0 1.8rem; padding: 1.4rem 0 1.4rem 1.5rem;
  border-left: 3px solid var(--accent);
  font-family: var(--display); font-weight: 400; text-transform: uppercase;
  font-size: clamp(1.3rem, 2.6vw, 1.9rem); line-height: 1.16; color: var(--ink);
}
.ticks { list-style: none; margin: 0; padding: 0; }
.ticks li {
  position: relative; padding-left: 1.9rem; margin-bottom: .85rem; color: var(--ink-dim);
}
.ticks li::before {
  content: ""; position: absolute; left: 0; top: .52em;
  width: 12px; height: 7px; border-left: 2px solid var(--accent);
  border-bottom: 2px solid var(--accent); transform: rotate(-45deg);
}

/* ---------- offerings ---------- */
.offerings { list-style: none; margin: 0; padding: 0; display: grid; gap: 1rem; }
@media (min-width: 760px) { .offerings { grid-template-columns: 1fr 1fr; } }

.offer {
  position: relative; overflow: hidden;
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1.7rem 1.6rem 1.9rem;
  transition: transform var(--t), border-color var(--t), box-shadow var(--t);
}
.offer::after {
  content: ""; position: absolute; left: 0; right: 0; top: 0; height: 2px;
  background: linear-gradient(90deg, var(--accent-hot), var(--accent));
  transform: scaleX(0); transform-origin: 0 50%; transition: transform var(--t);
}
.offer:hover, .offer:focus-within {
  transform: translateY(-4px);
  border-color: color-mix(in srgb, var(--accent) 45%, transparent);
  box-shadow: var(--shadow);
}
.offer:hover::after, .offer:focus-within::after { transform: scaleX(1); }

.offer-top { display: flex; align-items: baseline; justify-content: space-between; gap: 1rem; margin-bottom: .7rem; }
.offer h3 { font-size: 1.22rem; margin: 0; letter-spacing: -.01em; }
.offer .price {
  font-family: var(--display); font-size: 1.5rem; color: var(--accent); white-space: nowrap;
}
.offer .price:empty, .offer p:empty, .offer h3:empty { display: none; }
.offer p { color: var(--ink-dim); margin: 0; font-size: .97rem; }
.offer-arrow {
  position: absolute; right: 1.4rem; bottom: 1.3rem; color: var(--accent);
  opacity: 0; transform: translateX(-6px); transition: opacity var(--t), transform var(--t);
}
.offer:hover .offer-arrow { opacity: 1; transform: none; }

/* ---------- testimonials ---------- */
.quotes { display: grid; gap: 1rem; }
@media (min-width: 860px) { .quotes { grid-template-columns: repeat(3, 1fr); } }
.quote {
  margin: 0; padding: 1.7rem 1.6rem; background: var(--surface-2);
  border: 1px solid var(--line); border-radius: var(--radius);
}
.quote blockquote { margin: 0 0 1rem; font-size: 1.02rem; }
.quote blockquote::before { content: "“"; color: var(--accent); font-size: 2.4rem; line-height: 0; vertical-align: -.28em; margin-right: .1em; }
.quote figcaption { font: 600 .78rem/1 var(--mono); letter-spacing: .1em; text-transform: uppercase; color: var(--ink-dim); }

/* ---------- faq ---------- */
details {
  border-bottom: 1px solid var(--line); padding: 1.15rem 0;
}
summary {
  cursor: pointer; list-style: none; font-weight: 650; font-size: 1.06rem;
  display: flex; justify-content: space-between; align-items: center; gap: 1.2rem;
}
summary::-webkit-details-marker { display: none; }
summary::after {
  content: ""; flex: 0 0 auto; width: 11px; height: 11px;
  border-right: 2px solid var(--accent); border-bottom: 2px solid var(--accent);
  transform: rotate(45deg); transition: transform var(--t-fast);
}
details[open] summary::after { transform: rotate(-135deg); }
details p { margin: .9rem 0 0; color: var(--ink-dim); max-width: 62ch; }
details[open] p { animation: unfold var(--t) both; }
@keyframes unfold { from { opacity: 0; transform: translateY(-6px); } }

/* ---------- contact ---------- */
.contact-form { display: grid; gap: 1rem; max-width: 32rem; }
.field { display: grid; gap: .4rem; }
label { font: 600 .72rem/1 var(--mono); letter-spacing: .13em; text-transform: uppercase; color: var(--ink-dim); }
input, textarea {
  width: 100%; padding: .8rem .9rem; font: inherit; font-size: .98rem;
  color: var(--ink); background: var(--surface); border: 1px solid var(--line); border-radius: 10px;
  transition: border-color var(--t-fast);
}
input:focus, textarea:focus { outline: none; border-color: var(--accent); }
textarea { resize: vertical; }
.err { margin: 0; color: #fca5a5; font-size: .84rem; }
.field.invalid input, .field.invalid textarea { border-color: #f87171; }

.details { list-style: none; margin: 0; padding: 0; }
.details li {
  display: flex; justify-content: space-between; gap: 1.2rem;
  padding: .95rem 0; border-bottom: 1px solid var(--line); font-size: .97rem;
}
.details li:last-child { border-bottom: 0; }
.details li > span:first-child {
  font: 600 .72rem/1.5 var(--mono); letter-spacing: .13em; text-transform: uppercase; color: var(--ink-dim);
}
.details a { text-decoration: none; }
.details a:hover { text-decoration: underline; }

/* ---------- footer ---------- */
footer { border-top: 1px solid var(--line); padding-block: 2rem; color: var(--ink-dim); font-size: .88rem; }
.foot { display: flex; flex-wrap: wrap; gap: 1rem; justify-content: space-between; align-items: center; }
.foot nav { display: flex; flex-wrap: wrap; gap: 1.2rem; }
.foot a { color: var(--ink-dim); text-decoration: none; }
.foot a:hover { color: var(--accent); }

/* ============================================================
   MOTION
   Reveal styles apply only once JS has added .js-motion to <html>.
   Without JS the content renders in its final state - never hidden.
   ============================================================ */
.js-motion .reveal { opacity: 0; transform: translateY(26px); }
.js-motion .reveal.in {
  opacity: 1; transform: none;
  transition: opacity 420ms cubic-bezier(.2, .7, .3, 1),
              transform 420ms cubic-bezier(.2, .7, .3, 1);
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .js-motion .reveal,
  .js-motion .reveal.in { opacity: 1; transform: none; transition: none; }
  .marquee-track { animation: none; transform: none; }
  .hero h1 .hl { background-position: 0 0; }
  details[open] p { animation: none; }
  .btn:hover .arw,
  .offer:hover { transform: none; }
  .scroll-progress { display: none; }
  * { animation-duration: .001ms !important; transition-duration: .001ms !important; }
}