/* ============================================================
   wireless.bg – Premium Domain For Sale
   styles.css
   ============================================================ */

/* ---- Reset & Base ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --blue-50:  #EFF6FF;
  --blue-100: #DBEAFE;
  --blue-200: #BFDBFE;
  --blue-500: #3B82F6;
  --blue-600: #2563EB;
  --blue-700: #1D4ED8;
  --blue-800: #1E40AF;
  --blue-900: #1E3A8A;
  --slate-50:  #F8FAFC;
  --slate-100: #F1F5F9;
  --slate-200: #E2E8F0;
  --slate-400: #94A3B8;
  --slate-500: #64748B;
  --slate-600: #475569;
  --slate-700: #334155;
  --slate-800: #1E293B;
  --slate-900: #0F172A;
  --white: #FFFFFF;
  --red-500: #EF4444;
  --green-500: #22C55E;
  --green-50:  #F0FDF4;
  --font: 'Inter', system-ui, -apple-system, sans-serif;
  --radius-sm: 6px;
  --radius:    10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,.07), 0 1px 2px rgba(0,0,0,.06);
  --shadow:    0 4px 6px -1px rgba(0,0,0,.07), 0 2px 4px -1px rgba(0,0,0,.06);
  --shadow-md: 0 10px 15px -3px rgba(0,0,0,.08), 0 4px 6px -2px rgba(0,0,0,.05);
  --shadow-lg: 0 20px 25px -5px rgba(0,0,0,.09), 0 10px 10px -5px rgba(0,0,0,.04);
  --transition: .2s ease;
}

html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font);
  color: var(--slate-800);
  background: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img, svg { display: block; max-width: 100%; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
button { cursor: pointer; font-family: inherit; }
input, textarea, select { font-family: inherit; }

/* ---- Utility ---- */
.container {
  width: 100%;
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
}
.container--narrow { max-width: 760px; }

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 600;
  border-radius: var(--radius);
  border: 2px solid transparent;
  transition: background var(--transition), color var(--transition), border-color var(--transition), box-shadow var(--transition), transform var(--transition);
  white-space: nowrap;
  cursor: pointer;
  text-decoration: none;
  line-height: 1;
}
.btn:focus-visible {
  outline: 3px solid var(--blue-500);
  outline-offset: 3px;
}
.btn--sm  { padding: 8px 18px; font-size: .875rem; }
.btn--lg  { padding: 16px 36px; font-size: 1.0625rem; }
.btn--full { width: 100%; }

.btn--primary {
  background: var(--blue-600);
  color: var(--white);
  border-color: var(--blue-600);
}
.btn--primary:hover {
  background: var(--blue-700);
  border-color: var(--blue-700);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn--outline {
  background: transparent;
  color: var(--white);
  border-color: rgba(255,255,255,.55);
}
.btn--outline:hover {
  background: rgba(255,255,255,.12);
  border-color: var(--white);
}

/* ---- Navigation ---- */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--slate-200);
  box-shadow: var(--shadow-sm);
}
.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: 24px;
}
.nav__logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--slate-900);
  letter-spacing: -0.5px;
  flex-shrink: 0;
}
.logo-tld { color: var(--blue-600); }
.logo-icon { display: flex; align-items: center; }

/* Nav links (desktop) */
.nav__links {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
}
.nav__link {
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: .875rem;
  font-weight: 500;
  color: var(--slate-600);
  transition: color var(--transition), background var(--transition);
  white-space: nowrap;
}
.nav__link:hover,
.nav__link.active {
  color: var(--blue-600);
  background: var(--blue-50);
}
.nav__link:focus-visible {
  outline: 2px solid var(--blue-500);
  outline-offset: 2px;
}

/* Hamburger (mobile) */
.nav__hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  border: 1.5px solid var(--slate-200);
  border-radius: var(--radius-sm);
  background: transparent;
  flex-shrink: 0;
  padding: 0;
}
.nav__hamburger span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--slate-700);
  border-radius: 2px;
  transition: transform .25s ease, opacity .25s ease;
}
.nav__hamburger[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__hamburger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav__hamburger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile dropdown menu */
.nav__mobile {
  display: none;
  position: fixed;
  top: 68px;
  left: 0;
  right: 0;
  z-index: 99;
  background: var(--white);
  border-bottom: 1px solid var(--slate-200);
  box-shadow: var(--shadow-md);
  flex-direction: column;
  padding: 12px 16px 20px;
  gap: 4px;
}
.nav__mobile.is-open {
  display: flex;
}
.nav__mobile-link {
  padding: 12px 16px;
  border-radius: var(--radius);
  font-size: .9375rem;
  font-weight: 500;
  color: var(--slate-700);
  transition: color var(--transition), background var(--transition);
}
.nav__mobile-link:hover {
  color: var(--blue-600);
  background: var(--blue-50);
}
.nav__mobile-link--cta {
  margin-top: 8px;
  background: var(--blue-600);
  color: var(--white) !important;
  text-align: center;
  font-weight: 600;
}
.nav__mobile-link--cta:hover {
  background: var(--blue-700) !important;
}

/* ---- Hero ---- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.hero__bg {
  position: absolute;
  inset: 0;
  background-image: url('https://images.unsplash.com/photo-1747140838654-af1bab8d5b12?crop=entropy&cs=tinysrgb&fit=max&fm=jpg&ixid=M3w4MDU5MjV8MHwxfHNlYXJjaHwzfHx3aXJlbGVzcyUyMHRlY2hub2xvZ3klMjBuZXR3b3JrJTIwc2lnbmFsJTIwcHJlbWl1bSUyMGRvbWFpbnxlbnwwfHx8fDE3NzMzMjQ4OTl8MA&ixlib=rb-4.1.0&q=80&w=1080');
  background-size: cover;
  background-position: center top;
  background-repeat: no-repeat;
}
.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(15, 23, 42, .88) 0%,
    rgba(30, 58, 138, .80) 50%,
    rgba(15, 23, 42, .90) 100%
  );
}
.hero__content {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 120px 24px 80px;
  color: var(--white);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 28px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,.12);
  border: 1px solid rgba(255,255,255,.25);
  color: var(--blue-200);
  padding: 8px 20px;
  border-radius: 999px;
  font-size: .875rem;
  font-weight: 600;
  letter-spacing: .5px;
  text-transform: uppercase;
}

/* Domain Logo */
.domain-logo {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}
.domain-logo__icon {
  width: 100px;
  height: 100px;
  background: rgba(255,255,255,.1);
  border: 2px solid rgba(255,255,255,.2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(8px);
}
.domain-logo__name {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 900;
  letter-spacing: -2px;
  color: var(--white);
  line-height: 1;
}
.domain-logo__name .tld { color: var(--blue-300, #93C5FD); }

.hero__title {
  font-size: clamp(1.75rem, 4.5vw, 3rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -1px;
  max-width: 800px;
}
.highlight {
  color: var(--blue-300, #93C5FD);
}
.hero__subtitle {
  font-size: 1.125rem;
  color: rgba(255,255,255,.8);
  max-width: 640px;
  line-height: 1.7;
}

/* Hero Stats */
.hero__stats {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  width: 100%;
  max-width: 900px;
}
.stat {
  background: rgba(255,255,255,.1);
  border: 1px solid rgba(255,255,255,.18);
  border-radius: var(--radius-lg);
  padding: 18px 28px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  min-width: 170px;
  flex: 1;
  backdrop-filter: blur(6px);
}
.stat__number {
  font-size: 1.875rem;
  font-weight: 800;
  color: var(--blue-200);
  letter-spacing: -1px;
  line-height: 1;
}
.stat__label {
  font-size: .8125rem;
  color: rgba(255,255,255,.7);
  text-align: center;
}
.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: center;
}

/* ---- Sections ---- */
.section {
  padding: 96px 0;
}
.section--light {
  background: var(--slate-50);
}
.section--blue {
  background: var(--blue-900);
  color: var(--white);
}
.section__header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 64px;
}
.section__header--light .section__title,
.section__header--light .section__subtitle {
  color: var(--white);
}
.section__header--light .section__subtitle { color: var(--blue-200); }
.section__title {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 800;
  color: var(--slate-900);
  letter-spacing: -1px;
  line-height: 1.2;
  margin-bottom: 16px;
}
.section__title em {
  color: var(--blue-600);
  font-style: normal;
}
.section__subtitle {
  font-size: 1.0625rem;
  color: var(--slate-500);
  line-height: 1.7;
}

/* ---- Metrics Grid ---- */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
  margin-bottom: 48px;
}
.metric-card {
  background: var(--white);
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition);
}
.metric-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.metric-card__icon {
  width: 52px;
  height: 52px;
  background: var(--blue-50);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--blue-600);
}
.metric-card__value {
  font-size: 2rem;
  font-weight: 800;
  color: var(--blue-600);
  letter-spacing: -1px;
  line-height: 1;
}
.metric-card__label {
  font-size: .875rem;
  color: var(--slate-500);
  line-height: 1.5;
}

/* Trend Chart */
.trend-chart {
  background: var(--white);
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-sm);
}
.trend-chart__title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--slate-700);
  margin-bottom: 20px;
}
.trend-chart__wrapper {
  overflow-x: auto;
}
.trend-chart__wrapper svg {
  min-width: 480px;
  width: 100%;
  height: auto;
}

/* ---- Advantages ---- */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}
.advantage-card {
  background: var(--white);
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-xl);
  padding: 40px 32px;
  position: relative;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition);
}
.advantage-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
}
.advantage-card--featured {
  border-color: var(--blue-200);
  background: linear-gradient(160deg, var(--blue-50) 0%, var(--white) 100%);
}
.advantage-card--featured::before {
  content: 'Most Impactful';
  position: absolute;
  top: -1px;
  right: 24px;
  background: var(--blue-600);
  color: var(--white);
  font-size: .75rem;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  letter-spacing: .5px;
  text-transform: uppercase;
}
.advantage-card__number {
  font-size: 4rem;
  font-weight: 900;
  color: var(--blue-100);
  line-height: 1;
  margin-bottom: 8px;
  letter-spacing: -2px;
}
.advantage-card--featured .advantage-card__number { color: var(--blue-200); }
.advantage-card__icon {
  color: var(--blue-600);
  margin-bottom: 16px;
}
.advantage-card__title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--slate-900);
  margin-bottom: 12px;
  line-height: 1.3;
}
.advantage-card__text {
  font-size: .9375rem;
  color: var(--slate-600);
  line-height: 1.7;
  margin-bottom: 20px;
}
.advantage-card__points {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.advantage-card__points li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: .875rem;
  color: var(--slate-600);
}
.advantage-card__points li::before {
  content: '';
  width: 18px;
  height: 18px;
  background: var(--blue-600);
  border-radius: 50%;
  flex-shrink: 0;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E");
  background-size: 11px;
  background-position: center;
  background-repeat: no-repeat;
  margin-top: 1px;
}

/* ---- Business Ideas ---- */
.ideas-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}
.idea-card {
  background: var(--white);
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  position: relative;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
  overflow: hidden;
}
.idea-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--blue-200);
  transform: translateY(-2px);
}
.idea-card__icon {
  width: 48px;
  height: 48px;
  background: var(--blue-50);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--blue-600);
  margin-bottom: 14px;
}
.idea-card__number {
  position: absolute;
  top: 16px;
  right: 20px;
  font-size: 2rem;
  font-weight: 900;
  color: var(--slate-100);
  letter-spacing: -1px;
  line-height: 1;
}
.idea-card__title {
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--slate-900);
  margin-bottom: 10px;
  line-height: 1.3;
}
.idea-card__text {
  font-size: .875rem;
  color: var(--slate-500);
  line-height: 1.65;
}
.idea-card__text strong { color: var(--blue-700); }

/* ---- Industry Stats ---- */
.industry-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
}
.industry-stat {
  background: var(--slate-50);
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  text-align: center;
  transition: box-shadow var(--transition), transform var(--transition);
}
.industry-stat:hover {
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}
.industry-stat__value {
  font-size: 2.25rem;
  font-weight: 900;
  color: var(--blue-600);
  letter-spacing: -1.5px;
  margin-bottom: 8px;
  line-height: 1;
}
.industry-stat__label {
  font-size: .9375rem;
  font-weight: 600;
  color: var(--slate-700);
  margin-bottom: 6px;
  line-height: 1.4;
}
.industry-stat__detail {
  font-size: .8125rem;
  color: var(--slate-400);
  line-height: 1.5;
}

/* ---- Process Steps ---- */
.process-steps {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  margin-bottom: 48px;
}
.process-step {
  display: flex;
  gap: 20px;
  align-items: flex-start;
}
.process-step__number {
  width: 48px;
  height: 48px;
  background: var(--blue-600);
  color: var(--white);
  font-size: 1.25rem;
  font-weight: 800;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: 0 0 0 4px rgba(37,99,235,.3);
}
.process-step__title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 6px;
}
.process-step__text {
  font-size: .875rem;
  color: var(--blue-200);
  line-height: 1.65;
}
.process-step__text strong { color: var(--white); }

.process-trust {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
}
.trust-badge {
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,.1);
  border: 1px solid rgba(255,255,255,.2);
  padding: 10px 20px;
  border-radius: 999px;
  font-size: .875rem;
  font-weight: 600;
  color: var(--white);
}

/* ---- Contact Form ---- */
.contact-form {
  background: var(--white);
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-xl);
  padding: 48px 40px;
  box-shadow: var(--shadow-md);
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 22px;
}
.form-label {
  font-size: .875rem;
  font-weight: 600;
  color: var(--slate-700);
}
.required { color: var(--red-500); margin-left: 2px; }
.form-input,
.form-textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1.5px solid var(--slate-200);
  border-radius: var(--radius);
  font-size: .9375rem;
  color: var(--slate-800);
  background: var(--white);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}
.form-input:focus,
.form-textarea:focus {
  border-color: var(--blue-500);
  box-shadow: 0 0 0 3px rgba(59,130,246,.15);
}
.form-input.error,
.form-textarea.error {
  border-color: var(--red-500);
  box-shadow: 0 0 0 3px rgba(239,68,68,.1);
}
.form-textarea { resize: vertical; min-height: 130px; }

.input-prefix-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}
.input-prefix {
  position: absolute;
  left: 14px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--slate-500);
  pointer-events: none;
}
.form-input--prefixed { padding-left: 30px; }

.form-error {
  font-size: .8125rem;
  color: var(--red-500);
  font-weight: 500;
  min-height: 18px;
}
.form-hint {
  font-size: .8125rem;
  color: var(--slate-400);
}

/* CAPTCHA */
.captcha-group {}
.captcha-question {
  font-weight: 700;
  color: var(--blue-700);
  font-size: 1rem;
}
.captcha-row {
  display: flex;
  gap: 12px;
  align-items: center;
}
.captcha-input { max-width: 160px; }
.captcha-refresh {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 16px;
  border: 1.5px solid var(--slate-200);
  border-radius: var(--radius);
  background: var(--slate-50);
  font-size: .8125rem;
  font-weight: 600;
  color: var(--slate-600);
  transition: background var(--transition), border-color var(--transition);
}
.captcha-refresh:hover {
  background: var(--blue-50);
  border-color: var(--blue-300);
  color: var(--blue-700);
}

/* Checkbox */
.checkbox-label {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  cursor: pointer;
  user-select: none;
}
.checkbox-input {
  width: 20px;
  height: 20px;
  min-width: 20px;
  margin-top: 2px;
  cursor: pointer;
  accent-color: var(--blue-600);
  border: 2px solid var(--slate-300);
  border-radius: 4px;
}
.checkbox-input:focus-visible {
  outline: 3px solid var(--blue-500);
  outline-offset: 2px;
}
.checkbox-text {
  font-size: .9375rem;
  color: var(--slate-600);
  line-height: 1.5;
}

/* Form Success */
.form-success {
  display: none;
  align-items: center;
  gap: 14px;
  background: var(--green-50);
  border: 1.5px solid var(--green-500);
  border-radius: var(--radius);
  padding: 16px 20px;
  font-size: .9375rem;
  color: #166534;
  margin-bottom: 20px;
}
.form-success.is-visible {
  display: flex;
}
.form-success svg { color: var(--green-500); flex-shrink: 0; }

.form-privacy {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-size: .8125rem;
  color: var(--slate-400);
  margin-top: 12px;
  text-align: center;
}

/* ---- Footer ---- */
.footer {
  background: var(--slate-900);
  color: var(--slate-400);
  padding: 48px 0 36px;
}
.footer__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  text-align: center;
}
.footer__logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1.125rem;
  font-weight: 800;
  color: var(--white);
}
.footer__nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 4px 8px;
}
.footer__link {
  padding: 5px 12px;
  border-radius: var(--radius-sm);
  font-size: .875rem;
  color: var(--slate-400);
  transition: color var(--transition), background var(--transition);
}
.footer__link:hover {
  color: var(--blue-300, #93C5FD);
  background: rgba(255,255,255,.06);
}
.footer__link:focus-visible {
  outline: 2px solid var(--blue-400);
  outline-offset: 2px;
}
.footer__copy { font-size: .875rem; }
.footer__disclaimer { font-size: .75rem; color: var(--slate-500); max-width: 600px; line-height: 1.6; }

/* ---- Back to Top ---- */
.back-to-top {
  position: fixed;
  bottom: 28px;
  right: 24px;
  z-index: 90;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--blue-600);
  color: var(--white);
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px rgba(37,99,235,.45);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity .3s ease, visibility .3s ease, transform .3s ease, background .2s ease;
}
.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.back-to-top:hover {
  background: var(--blue-700);
  box-shadow: 0 6px 20px rgba(37,99,235,.55);
  transform: translateY(-2px);
}
.back-to-top:focus-visible {
  outline: 3px solid var(--blue-300, #93C5FD);
  outline-offset: 3px;
}
@media (max-width: 520px) {
  .back-to-top { bottom: 20px; right: 16px; width: 44px; height: 44px; }
}

/* ---- Scroll Animations ---- */
.animate-fade-up {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity .55s ease, transform .55s ease;
}
.animate-fade-up.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---- Responsive ---- */
@media (max-width: 900px) {
  .process-steps {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 900px) {
  .nav__links { display: none; }
  .nav__hamburger { display: flex; }
  .nav__cta { display: none; }
}

@media (max-width: 768px) {
  .section { padding: 64px 0; }
  .form-row { grid-template-columns: 1fr; }
  .contact-form { padding: 32px 20px; }
  .hero__content { padding: 100px 16px 60px; }
  .hero__stats { gap: 8px; }
  .stat { min-width: 140px; padding: 14px 16px; }
  .stat__number { font-size: 1.5rem; }
  .advantages-grid { grid-template-columns: 1fr; }
  .ideas-grid { grid-template-columns: 1fr 1fr; }
  .process-steps { grid-template-columns: 1fr; gap: 24px; }
}

@media (max-width: 520px) {
  .ideas-grid { grid-template-columns: 1fr; }
  .industry-grid { grid-template-columns: 1fr 1fr; }
  .captcha-row { flex-direction: column; align-items: flex-start; }
  .captcha-input { max-width: 100%; width: 100%; }
  .hero__actions { flex-direction: column; align-items: center; }
  .trust-badge { font-size: .75rem; padding: 8px 14px; }
}

@media (max-width: 400px) {
  .industry-grid { grid-template-columns: 1fr; }
}

/* ---- Print ---- */
@media print {
  .nav, .btn, .hero__actions, .contact-form { display: none; }
  .section { padding: 32px 0; }
}

/* ---- Reduced Motion ---- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; }
  html { scroll-behavior: auto; }
}