/* ============================================================
   FINMOTO — design tokens
   ============================================================ */
:root {
  --ink: #0C1210;
  --panel: #141B18;
  --panel-2: #1c241f;
  --line: #2c3530;

  --paper: #F2EFE6;
  --paper-dim: #E7E2D2;
  --text-dark: #10140F;

  --white: #FBFAF6;
  --steel: #8D958F;
  --steel-dark: #57605b;

  --volt: #FFC93C;
  --volt-ink: #4a3a0a;
  --teal: #2BB8A0;

  --font-display: "Space Grotesk", sans-serif;
  --font-body: "Inter", sans-serif;
  --font-mono: "IBM Plex Mono", monospace;

  --wrap: 1180px;
  --radius: 4px;
}

/* ============================================================
   RESET / BASE
   ============================================================ */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}

body {
  margin: 0;
  font-family: var(--font-body);
  background: var(--paper);
  color: var(--text-dark);
  -webkit-font-smoothing: antialiased;
  line-height: 1.5;
}

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

a {
  color: inherit;
  text-decoration: none;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  margin: 0;
  letter-spacing: -0.01em;
}

p { margin: 0; }

ul, ol { margin: 0; padding: 0; list-style: none; }

.wrap {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 32px;
}

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

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

/* ============================================================
   REVEAL ON SCROLL
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.in-view {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 26px;
  border-radius: var(--radius);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.95rem;
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, background 0.2s ease, border-color 0.2s ease;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-2px); }

.btn--volt {
  background: var(--volt);
  color: var(--volt-ink);
}
.btn--volt:hover { background: #ffd662; }

.btn--ghost {
  background: transparent;
  border-color: var(--steel-dark);
  color: var(--white);
}
.btn--ghost:hover { border-color: var(--volt); color: var(--volt); }

.btn--small { padding: 10px 18px; font-size: 0.85rem; }
.btn--full { width: 100%; margin-top: 6px; }

/* ============================================================
   EYEBROW / SECTION HEAD
   ============================================================ */
.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--volt);
  margin: 0 0 18px;
}
.eyebrow--dark { color: var(--teal); }

.section-head {
  max-width: 620px;
  margin-bottom: 56px;
}
.section-head h2 {
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  margin-bottom: 14px;
}
.section-head__sub {
  color: var(--steel-dark);
  font-size: 1.05rem;
  max-width: 520px;
}

/* ============================================================
   HEADER / NAV
   ============================================================ */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: transparent;
  transition: background 0.3s ease, border-color 0.3s ease;
  border-bottom: 1px solid transparent;
}
.site-header.is-scrolled {
  background: rgba(12, 18, 16, 0.92);
  backdrop-filter: blur(8px);
  border-color: var(--line);
}

.header__inner {
  display: flex;
  align-items: center;
  gap: 28px;
  height: 76px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--white);
  margin-right: auto;
}
.logo__mark { width: 26px; height: 26px; color: var(--volt); }
.logo__text {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: 0.02em;
}

.main-nav {
  display: flex;
  gap: 30px;
}
.main-nav a {
  color: var(--steel);
  font-size: 0.92rem;
  font-weight: 500;
  transition: color 0.2s ease;
}
.main-nav a:hover { color: var(--white); }

.header__cta { flex-shrink: 0; }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px; height: 32px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}
.nav-toggle span {
  display: block;
  height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

/* ============================================================
   HERO
   ============================================================ */
.hero {
  position: relative;
  background: var(--ink);
  color: var(--white);
  padding: 150px 0 0;
  overflow: hidden;
}

.hero__inner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 40px;
  align-items: center;
  padding-bottom: 80px;
}

.hero__title {
  font-size: clamp(2.6rem, 5.2vw, 4.2rem);
  line-height: 1.04;
  margin-bottom: 26px;
}
.hero__accent { color: var(--volt); }

.hero__sub {
  color: var(--steel);
  font-size: 1.1rem;
  max-width: 480px;
  margin-bottom: 36px;
}

.hero__actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* --- cell diagram --- */
.hero__visual { position: relative; display: flex; justify-content: center; }
.cell-diagram { position: relative; width: 100%; max-width: 320px; }
.cell-svg { width: 100%; height: auto; }

.charge-fill {
  animation: chargePulse 4s ease-in-out infinite alternate;
  transform-box: fill-box;
  transform-origin: bottom;
}
@keyframes chargePulse {
  0%   { transform: scaleY(0.12); }
  100% { transform: scaleY(0.92); }
}

.cell-label {
  position: absolute;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  color: var(--steel);
  white-space: nowrap;
}
.cell-label--casing    { top: 12%; right: -4%; }
.cell-label--cathode   { top: 32%; right: -4%; }
.cell-label--separator { top: 55%; left: -6%; }
.cell-label--anode     { top: 74%; left: -6%; }

.cell-readout {
  position: absolute;
  bottom: 6%;
  left: 50%;
  transform: translateX(-50%);
  text-align: center;
}
.cell-readout__value {
  font-family: var(--font-mono);
  font-size: 2.1rem;
  color: var(--volt);
  font-weight: 600;
}
.cell-readout__unit {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--volt);
}
.cell-readout__caption {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.08em;
  color: var(--steel-dark);
  margin-top: 4px;
  text-transform: uppercase;
}

/* --- stats --- */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line);
  padding: 40px 0;
}
.stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding-right: 20px;
}
.stat__value {
  font-family: var(--font-mono);
  font-size: 2.2rem;
  font-weight: 600;
  color: var(--white);
}
.stat__label {
  font-size: 0.85rem;
  color: var(--steel);
}

/* --- wave divider --- */
.wave-divider {
  display: block;
  width: 100%;
  height: 40px;
  color: var(--volt);
  opacity: 0.55;
}
.wave-divider--top { color: var(--steel-dark); opacity: 0.4; }

/* ============================================================
   PARTNERS STRIP
   ============================================================ */
.partners {
  background: var(--panel);
  padding: 34px 0;
}
.partners__label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--steel-dark);
  text-align: center;
  margin-bottom: 20px;
}
.partners__row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 40px;
}
.partners__row span {
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--steel);
  font-size: 1rem;
  letter-spacing: 0.02em;
}

/* ============================================================
   PRODUCTS
   ============================================================ */
.products { padding: 110px 0; }

.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.product-card {
  position: relative;
  background: var(--white);
  border: 1px solid #ddd8c8;
  border-radius: var(--radius);
  padding: 34px 28px;
  display: flex;
  flex-direction: column;
}
.product-card--featured {
  background: var(--ink);
  color: var(--white);
  border-color: var(--ink);
}
.product-card__badge {
  position: absolute;
  top: -13px;
  left: 28px;
  background: var(--volt);
  color: var(--volt-ink);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 5px 10px;
  border-radius: 3px;
}
.product-card__top { margin-bottom: 24px; }
.product-card__top h3 {
  font-size: 1.5rem;
  margin-bottom: 6px;
}
.product-card__tag {
  font-size: 0.88rem;
  color: var(--steel-dark);
}
.product-card--featured .product-card__tag { color: var(--steel); }

.spec-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin: 0 0 26px;
  flex-grow: 1;
}
.spec-list > div {
  display: flex;
  justify-content: space-between;
  padding: 11px 0;
  border-bottom: 1px dashed #d9d4c2;
  font-family: var(--font-mono);
  font-size: 0.86rem;
}
.product-card--featured .spec-list > div { border-bottom-color: var(--line); }
.spec-list dt { color: var(--steel-dark); }
.product-card--featured .spec-list dt { color: var(--steel); }
.spec-list dd { margin: 0; font-weight: 600; }

.product-card__link {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.92rem;
  color: var(--text-dark);
  transition: color 0.2s ease;
}
.product-card--featured .product-card__link { color: var(--volt); }
.product-card__link:hover { color: var(--teal); }

/* ============================================================
   TECHNOLOGY
   ============================================================ */
.tech {
  position: relative;
  background: var(--ink);
  color: var(--white);
  padding: 40px 0 110px;
}

.tech__inner {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 60px;
  align-items: start;
  margin-top: 50px;
}

.tech__lead {
  color: var(--steel);
  font-size: 1.05rem;
  max-width: 480px;
  margin: 16px 0 40px;
}

.tech-features {
  display: flex;
  flex-direction: column;
  gap: 26px;
}
.tech-feature {
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 16px;
}
.tech-feature__mark {
  font-family: var(--font-mono);
  color: var(--teal);
  font-size: 0.85rem;
  padding-top: 3px;
}
.tech-feature h4 {
  font-size: 1.05rem;
  margin-bottom: 6px;
}
.tech-feature p {
  color: var(--steel);
  font-size: 0.94rem;
  max-width: 400px;
}

.tech__visual {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
}
.bms-text {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.05em;
  fill: var(--steel);
}
.bms-text--volt { fill: var(--volt); }
.bms-text--teal { fill: var(--teal); }
.tech__caption {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--steel-dark);
  text-align: center;
  margin-top: 16px;
}

/* ============================================================
   PROCESS
   ============================================================ */
.process { padding: 110px 0; }

.process-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: #ddd8c8;
  border: 1px solid #ddd8c8;
}
.process-step {
  background: var(--paper);
  padding: 34px 30px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.process-step__num {
  font-family: var(--font-mono);
  color: var(--teal);
  font-size: 0.85rem;
}
.process-step h4 { font-size: 1.1rem; }
.process-step p { color: var(--steel-dark); font-size: 0.92rem; }

/* ============================================================
   WHY
   ============================================================ */
.why {
  background: var(--paper-dim);
  padding: 110px 0;
}
.why__inner { display: block; }
.why-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.why-card {
  background: var(--white);
  border: 1px solid #ddd8c8;
  border-radius: var(--radius);
  padding: 26px 22px;
}
.why-card h4 { font-size: 1.02rem; margin-bottom: 10px; }
.why-card p { color: var(--steel-dark); font-size: 0.9rem; }

/* ============================================================
   CONTACT
   ============================================================ */
.contact {
  position: relative;
  background: var(--ink);
  color: var(--white);
  padding: 30px 0 110px;
}
.contact__inner {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 60px;
  margin-top: 40px;
}
.contact .section-head__sub { color: var(--steel); }

.contact-details {
  margin-top: 40px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.contact-details li {
  font-size: 0.98rem;
  color: var(--white);
}
.contact-details span {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--steel-dark);
  margin-bottom: 4px;
}

.contact-form {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 34px;
  position: relative;
}
.form-row { margin-bottom: 18px; }
.form-row--split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 0;
}
.form-row--split > div { margin-bottom: 18px; }

.contact-form label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--steel);
  margin-bottom: 8px;
}
.contact-form input,
.contact-form select,
.contact-form textarea {
  width: 100%;
  background: var(--ink);
  border: 1px solid var(--line);
  border-radius: 3px;
  padding: 12px 14px;
  color: var(--white);
  transition: border-color 0.2s ease;
}
.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
  border-color: var(--volt);
  outline: none;
}
.contact-form textarea { resize: vertical; }

.form-success {
  display: none;
  margin-top: 16px;
  font-size: 0.9rem;
  color: var(--teal);
  font-family: var(--font-mono);
}
.form-success.is-visible { display: block; }

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer {
  background: var(--panel);
  color: var(--steel);
  padding: 70px 0 0;
}
.footer__inner {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 50px;
  border-bottom: 1px solid var(--line);
}
.logo--footer { margin-bottom: 16px; }
.footer__brand p {
  font-size: 0.9rem;
  max-width: 280px;
  color: var(--steel-dark);
}
.footer__col h5 {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--white);
  margin-bottom: 18px;
  font-weight: 500;
}
.footer__col a {
  display: block;
  font-size: 0.92rem;
  padding: 6px 0;
  transition: color 0.2s ease;
}
.footer__col a:hover { color: var(--volt); }

.footer__bottom {
  display: flex;
  justify-content: space-between;
  padding: 22px 0;
  font-size: 0.8rem;
  color: var(--steel-dark);
  flex-wrap: wrap;
  gap: 8px;
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 980px) {
  .hero__inner { grid-template-columns: 1fr; }
  .hero__visual { order: -1; max-width: 260px; margin: 0 auto 20px; }
  .stats { grid-template-columns: repeat(2, 1fr); row-gap: 28px; }
  .product-grid { grid-template-columns: 1fr; }
  .tech__inner { grid-template-columns: 1fr; }
  .tech__visual { max-width: 420px; }
  .process-list { grid-template-columns: 1fr; }
  .why-grid { grid-template-columns: repeat(2, 1fr); }
  .contact__inner { grid-template-columns: 1fr; }
  .footer__inner { grid-template-columns: 1fr 1fr; row-gap: 36px; }
}

@media (max-width: 760px) {
  .main-nav, .header__cta { display: none; }
  .nav-toggle { display: flex; }

  .main-nav.is-open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 76px; left: 0; right: 0;
    background: var(--ink);
    padding: 20px 32px 30px;
    border-bottom: 1px solid var(--line);
    gap: 4px;
  }
  .main-nav.is-open a { padding: 12px 0; border-bottom: 1px solid var(--line); }

  .hero { padding-top: 120px; }
  .hero__actions { flex-direction: column; align-items: stretch; }
  .stats { grid-template-columns: 1fr 1fr; }
  .why-grid { grid-template-columns: 1fr; }
  .form-row--split { grid-template-columns: 1fr; }
  .footer__inner { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .wrap { padding: 0 20px; }
  .cell-label { display: none; }
}