/* ==========================================================================
   Solar Tech — Deye Опт для інсталяторів
   Brand tokens sourced from solar-tech.com.ua (orange/green corporate palette)
   ========================================================================== */

:root {
  --color-orange: #e49c43;
  --color-orange-dark: #a46b25;
  --color-orange-light: #f7e3c8;
  --color-green: #7db051;
  --color-green-dark: #53880e;
  --color-green-light: #e5efdb;
  --color-dark: #212121;
  --color-text: #3a3a38;
  --color-gray: #8d8d8d;
  --color-gray-light: #f5f5f4;
  --color-border: #e2e2e1;
  --color-white: #ffffff;

  --font-body: 'Roboto', 'Segoe UI', Arial, sans-serif;
  --font-heading: 'Russo One', 'Roboto', Arial, sans-serif;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;

  --shadow-sm: 0 2px 10px rgba(33, 33, 33, 0.06);
  --shadow-md: 0 12px 32px rgba(33, 33, 33, 0.10);

  --header-height: 76px;
  --container-width: 1180px;
}

/* Reset / base
   ========================================================================== */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body, h1, h2, h3, p, ul, figure { margin: 0; }
ul { padding: 0; list-style: none; }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; }
input, select { font: inherit; }

body {
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-white);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  scroll-padding-top: calc(var(--header-height) + 12px);
}

h1, h2, h3 {
  font-family: var(--font-heading);
  color: var(--color-dark);
  line-height: 1.25;
  font-weight: 400;
}

.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 20px;
}

.section { padding: 72px 0; }
.section--alt { background: var(--color-gray-light); }

.section-title {
  font-size: clamp(24px, 3.4vw, 36px);
  text-align: center;
  max-width: 760px;
  margin: 0 auto 44px;
}
.section-title--left { text-align: left; margin: 0 0 10px; max-width: none; }

.section-subtitle {
  color: var(--color-gray);
  font-size: 15px;
  margin-bottom: 28px;
}

.badge {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.02em;
  padding: 7px 16px;
  border-radius: 999px;
  margin-bottom: 18px;
}
.badge--light { background: rgba(255,255,255,0.14); color: var(--color-white); border: 1px solid rgba(255,255,255,0.35); }

/* Icons
   ========================================================================== */
.icon { flex-shrink: 0; }
.icon--check { color: var(--color-green-dark); }

.icon-circle {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
}
.icon-circle--lg { width: 64px; height: 64px; }
.icon-circle--orange { background: var(--color-orange-light); color: var(--color-orange-dark); }
.icon-circle--green { background: var(--color-green-light); color: var(--color-green-dark); }

/* Buttons
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 700;
  font-size: 15px;
  border: none;
  border-radius: var(--radius-sm);
  padding: 14px 28px;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
  white-space: nowrap;
}
.btn--primary {
  background: var(--color-orange);
  color: var(--color-white);
  box-shadow: 0 6px 18px rgba(228, 156, 67, 0.35);
}
.btn--primary:hover { background: var(--color-orange-dark); transform: translateY(-1px); }
.btn--sm { padding: 10px 20px; font-size: 14px; }
.btn--lg { padding: 16px 34px; font-size: 16px; }
.btn--block { width: 100%; }

/* Header
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  display: flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--color-border);
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.logo { display: flex; align-items: center; gap: 12px; line-height: 1; }
.logo__img { height: 40px; width: auto; }
.logo__tag {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-green-dark);
  background: var(--color-green-light);
  padding: 5px 10px;
  border-radius: 999px;
  white-space: nowrap;
}
.site-header__actions { display: flex; align-items: center; gap: 20px; }
.site-header__phone {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 15px;
  color: var(--color-dark);
}
.site-header__phone .icon { color: var(--color-green-dark); }

/* Hero
   ========================================================================== */
.hero {
  position: relative;
  color: var(--color-white);
  padding: 88px 0 96px;
  overflow: hidden;
}
.hero__bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 15% 20%, rgba(125, 176, 81, 0.55), transparent 55%),
    radial-gradient(circle at 85% 15%, rgba(228, 156, 67, 0.5), transparent 50%),
    linear-gradient(135deg, #1c1c1a 0%, #212121 45%, #2a2a26 100%);
  z-index: -1;
}
.hero__content { max-width: 700px; }
.hero__title {
  font-size: clamp(30px, 4.6vw, 50px);
  margin-bottom: 20px;
  color: var(--color-white);
}
.hero__subtitle {
  font-size: 17px;
  color: rgba(255, 255, 255, 0.85);
  max-width: 600px;
  margin-bottom: 28px;
}
.hero__benefits { display: flex; flex-direction: column; gap: 12px; margin-bottom: 36px; }
.hero__benefits li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 15px;
  font-weight: 500;
}
.hero__benefits .icon--check {
  color: var(--color-dark);
  background: var(--color-green);
  border-radius: 50%;
  padding: 3px;
}

/* Cards grid (Why)
   ========================================================================== */
.why__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
}
.card {
  position: relative;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 30px 26px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.card h3 { font-size: 18px; margin-bottom: 10px; }
.card p { font-size: 14.5px; color: var(--color-gray); }
.card__index {
  position: absolute;
  top: 24px;
  right: 26px;
  font-family: var(--font-heading);
  font-size: 26px;
  color: var(--color-border);
}

/* Assortment
   ========================================================================== */
.assortment__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}
.assortment__card h3 { font-size: 21px; margin-bottom: 10px; }
.assortment__card p { color: var(--color-gray); font-size: 15px; margin-bottom: 18px; }
.card__badge {
  display: inline-block;
  font-size: 12.5px;
  font-weight: 700;
  color: var(--color-green-dark);
  background: var(--color-green-light);
  border-radius: 999px;
  padding: 6px 12px;
  margin-bottom: 18px;
}
.card__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 700;
  font-size: 14.5px;
  color: var(--color-orange-dark);
  transition: gap 0.15s ease;
}
.card__link:hover { gap: 10px; }
.assortment__note {
  text-align: center;
  margin-top: 40px;
  font-size: 14.5px;
  color: var(--color-gray);
  line-height: 1.8;
}

/* Social proof
   ========================================================================== */
.proof__stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
  max-width: 620px;
  margin: 0 auto;
}
.proof__stat {
  text-align: center;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 34px 20px;
  box-shadow: var(--shadow-sm);
}
.proof__stat .icon-circle { margin: 0 auto 16px; }
.proof__number {
  display: block;
  font-family: var(--font-heading);
  font-size: 40px;
  color: var(--color-dark);
}
.proof__number--sm { font-size: 28px; }
.proof__label { font-size: 14px; color: var(--color-gray); }

/* Steps
   ========================================================================== */
.steps__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 28px;
  counter-reset: step;
}
.steps__item { position: relative; padding-left: 4px; }
.steps__number {
  display: block;
  font-family: var(--font-heading);
  font-size: 34px;
  color: var(--color-orange);
  margin-bottom: 12px;
}
.steps__item:nth-child(even) .steps__number { color: var(--color-green-dark); }
.steps__item h3 { font-size: 18px; margin-bottom: 8px; }
.steps__item p { font-size: 14.5px; color: var(--color-gray); }

/* CTA banner
   ========================================================================== */
.cta-banner {
  background: linear-gradient(120deg, var(--color-green-dark), var(--color-green));
  color: var(--color-white);
  padding: 48px 0;
}
.cta-banner__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}
.cta-banner h2 { font-size: 26px; margin-bottom: 6px; }
.cta-banner p { color: rgba(255,255,255,0.85); font-size: 15px; }
.cta-banner .btn--primary { background: var(--color-white); color: var(--color-green-dark); box-shadow: none; }
.cta-banner .btn--primary:hover { background: var(--color-dark); color: var(--color-white); }

/* Form
   ========================================================================== */
.form-card {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
}
.form-card__form { padding: 48px 44px; }
.form-card__aside {
  background: var(--color-gray-light);
  padding: 48px 40px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  border-left: 1px solid var(--color-border);
}
.form-card__aside h3 { font-size: 17px; margin-bottom: 18px; }
.form-card__benefits { display: flex; flex-direction: column; gap: 14px; margin-bottom: 32px; }
.form-card__benefits li { display: flex; align-items: center; gap: 10px; font-size: 14.5px; }
.form-card__proof {
  display: flex;
  align-items: center;
  gap: 14px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
}
.form-card__proof .proof__label { font-size: 13.5px; max-width: 160px; }

.form { display: flex; flex-direction: column; gap: 18px; }
.form[hidden] { display: none; }
.form__field { display: flex; flex-direction: column; gap: 6px; }
.form__field label { font-size: 13.5px; font-weight: 700; color: var(--color-dark); }
.form__field input,
.form__field select {
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 13px 16px;
  font-size: 15px;
  color: var(--color-dark);
  background: var(--color-white);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.form__field input:focus,
.form__field select:focus {
  outline: none;
  border-color: var(--color-orange);
  box-shadow: 0 0 0 3px rgba(228, 156, 67, 0.18);
}
.form__field select { appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%238d8d8d' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  background-size: 18px;
}
.form__error {
  display: none;
  font-size: 12.5px;
  color: #c0392b;
}
.form__field.is-invalid input,
.form__field.is-invalid select { border-color: #c0392b; }
.form__field.is-invalid .form__error { display: block; }

.form__submit { margin-top: 6px; }
.form__privacy { font-size: 12px; color: var(--color-gray); text-align: center; }

.form__success { text-align: center; padding: 20px 0; }
.form__success .icon-circle { margin: 0 auto 18px; }
.form__success h3 { font-size: 24px; margin-bottom: 10px; }
.form__success p { color: var(--color-gray); font-size: 15px; max-width: 380px; margin: 0 auto; }

/* Footer
   ========================================================================== */
.site-footer {
  background: var(--color-dark);
  color: rgba(255, 255, 255, 0.7);
  padding: 32px 0 100px;
}
.site-footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}
.logo--footer {
  background: var(--color-white);
  padding: 8px 16px;
  border-radius: var(--radius-sm);
}
.logo--footer .logo__img { height: 30px; }
.site-footer__phone { display: flex; align-items: center; gap: 8px; font-weight: 700; color: var(--color-white); }
.site-footer__phone .icon { color: var(--color-green); }
.site-footer__copy { font-size: 13px; width: 100%; order: 3; padding-top: 16px; border-top: 1px solid rgba(255,255,255,0.1); }

/* Mobile sticky CTA
   ========================================================================== */
.mobile-cta {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  z-index: 90;
  padding: 12px 16px;
  background: rgba(255,255,255,0.96);
  backdrop-filter: blur(8px);
  border-top: 1px solid var(--color-border);
  display: none;
}

/* Scroll-reveal animation
   ========================================================================== */
[data-animate] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
[data-animate].is-visible {
  opacity: 1;
  transform: translateY(0);
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  [data-animate] { opacity: 1; transform: none; transition: none; }
}

/* Responsive
   ========================================================================== */
@media (max-width: 860px) {
  .form-card { grid-template-columns: 1fr; }
  .form-card__aside { border-left: none; border-top: 1px solid var(--color-border); }
  .cta-banner__inner { text-align: center; justify-content: center; }
}

@media (max-width: 640px) {
  :root { --header-height: 64px; }
  .section { padding: 52px 0; }
  .site-header__phone span { display: none; }
  .logo__tag { display: none; }
  .logo__img { height: 32px; }
  .hero { padding: 48px 0 64px; text-align: left; }
  .hero__title { font-size: 28px; }
  .form-card__form, .form-card__aside { padding: 32px 22px; }
  .mobile-cta { display: block; }
  .site-footer { padding-bottom: 96px; }
  .site-footer__inner { justify-content: center; text-align: center; }
}