/* ============================================================
   VOLTIFI — Official Brand Website
   Style: Modern Minimal Business · Black & White + Brand Accent
   ============================================================ */

:root {
  --brand: #0b5fff;
  --brand-dark: #0847c4;
  --brand-soft: rgba(11, 95, 255, 0.08);
  --ink: #0a0a0a;
  --ink-soft: #3d3d3d;
  --muted: #6b6b6b;
  --line: #e6e6e6;
  --paper: #ffffff;
  --fog: #f6f7f9;
  --maxw: 1180px;
  --radius: 14px;
  --shadow: 0 18px 50px rgba(10, 10, 10, 0.08);
  --font: "Inter", "Segoe UI", -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

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

ul {
  list-style: none;
}

.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Typography ---------- */
h1,
h2,
h3 {
  line-height: 1.15;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--brand);
}

.eyebrow::before {
  content: "";
  width: 22px;
  height: 2px;
  background: var(--brand);
}

.section {
  padding: 104px 0;
}

.section-head {
  max-width: 640px;
  margin-bottom: 56px;
}

.section-head h2 {
  font-size: clamp(30px, 4.2vw, 44px);
  margin: 14px 0 16px;
}

.section-head p {
  color: var(--muted);
  font-size: 17px;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  transition: transform 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
  cursor: pointer;
}

.btn-primary {
  background: var(--brand);
  color: #fff;
}

.btn-primary:hover {
  background: var(--brand-dark);
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(11, 95, 255, 0.28);
}

.btn-ghost {
  border: 1px solid var(--line);
  color: var(--ink);
  background: transparent;
}

.btn-ghost:hover {
  border-color: var(--ink);
  transform: translateY(-2px);
}

/* ---------- Header ---------- */
.header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.88);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}

.nav {
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-mark {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 800;
  letter-spacing: 0.04em;
}

.brand-mark .dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--brand);
  box-shadow: 0 0 0 4px var(--brand-soft);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 34px;
  font-size: 14px;
  font-weight: 500;
  color: var(--ink-soft);
}

.nav-links a {
  transition: color 0.2s ease;
}

.nav-links a:hover {
  color: var(--brand);
}

.nav-cta {
  padding: 9px 20px;
  font-size: 14px;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  flex-direction: column;
  gap: 5px;
  padding: 6px;
}

.nav-toggle span {
  width: 22px;
  height: 2px;
  background: var(--ink);
  transition: transform 0.25s ease, opacity 0.25s ease;
}

/* ---------- Hero ---------- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  background: var(--ink);
  color: #fff;
  overflow: hidden;
  padding: 140px 0 100px;
}

.hero::after {
  content: "";
  position: absolute;
  width: 560px;
  height: 560px;
  right: -140px;
  top: -140px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(11, 95, 255, 0.35), transparent 65%);
  pointer-events: none;
}

.hero::before {
  content: "";
  position: absolute;
  width: 420px;
  height: 420px;
  left: -160px;
  bottom: -160px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.06);
  pointer-events: none;
}

.hero .container {
  position: relative;
  z-index: 1;
}

.hero h1 {
  font-size: clamp(52px, 10vw, 120px);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 0.98;
}

.hero h1 .accent {
  color: var(--brand);
}

.hero-tagline {
  margin-top: 28px;
  font-size: clamp(17px, 2.4vw, 22px);
  color: rgba(255, 255, 255, 0.82);
  font-weight: 400;
  max-width: 560px;
}

.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 48px;
  margin-top: 56px;
  padding-top: 40px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}

.hero-stat strong {
  display: block;
  font-size: 30px;
  font-weight: 700;
  color: #fff;
}

.hero-stat span {
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.55);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 44px;
}

.hero-actions .btn-ghost {
  border-color: rgba(255, 255, 255, 0.3);
  color: #fff;
}

.hero-actions .btn-ghost:hover {
  border-color: #fff;
  background: rgba(255, 255, 255, 0.06);
}

/* ---------- About ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}

.about-text p {
  color: var(--muted);
  font-size: 17px;
  margin-bottom: 18px;
}

.about-text p strong {
  color: var(--ink);
}

.company-card {
  background: var(--fog);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 36px;
}

.company-card h3 {
  font-size: 18px;
  margin-bottom: 20px;
}

.company-card dl {
  display: grid;
  gap: 16px;
}

.company-card dt {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 3px;
}

.company-card dd {
  font-size: 15px;
  font-weight: 500;
  color: var(--ink);
}

/* ---------- Brand & Trademark ---------- */
.trademark {
  background: var(--fog);
}

.trademark-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.trademark-info p {
  color: var(--muted);
  font-size: 17px;
  margin-bottom: 28px;
}

.trademark-card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 48px;
  text-align: center;
}

.trademark-card .tm-label {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

.trademark-card .tm-number {
  display: block;
  font-size: clamp(40px, 6vw, 68px);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--brand);
  margin: 14px 0 8px;
}

.trademark-card .tm-legal {
  font-size: 14px;
  color: var(--muted);
}

.trademark-card .tm-flag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 20px;
  padding: 8px 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 500;
  color: var(--ink-soft);
}

.tm-dots {
  display: flex;
  justify-content: center;
  gap: 6px;
  margin-top: 22px;
}

.tm-dots i {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--line);
}

.tm-dots i.on {
  background: var(--brand);
}

/* ---------- Business ---------- */
.business-intro {
  max-width: 720px;
  margin-bottom: 56px;
  color: var(--muted);
  font-size: 17px;
}

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

.pipe-step {
  position: relative;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 36px 30px;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.pipe-step:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow);
  border-color: rgba(11, 95, 255, 0.35);
}

.pipe-step .step-no {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--brand);
}

.pipe-step h3 {
  font-size: 21px;
  margin: 14px 0 10px;
}

.pipe-step p {
  font-size: 15px;
  color: var(--muted);
}

.pipe-step .step-arrow {
  position: absolute;
  top: 44px;
  right: -20px;
  z-index: 2;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--brand);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  box-shadow: 0 8px 20px rgba(11, 95, 255, 0.3);
}

.pipe-step:last-child .step-arrow {
  display: none;
}

/* ---------- Market ---------- */
.market {
  background: var(--ink);
  color: #fff;
}

.market .section-head p {
  color: rgba(255, 255, 255, 0.6);
}

.market .eyebrow {
  color: #5b8cff;
}

.market .eyebrow::before {
  background: #5b8cff;
}

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

.market-card {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius);
  padding: 34px 28px;
  transition: background 0.25s ease, transform 0.25s ease;
}

.market-card:hover {
  background: rgba(255, 255, 255, 0.08);
  transform: translateY(-4px);
}

.market-card .market-flag {
  font-size: 30px;
  margin-bottom: 16px;
}

.market-card h3 {
  font-size: 19px;
  margin-bottom: 8px;
}

.market-card p {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.62);
}

.market-note {
  margin-top: 44px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.chip {
  padding: 10px 18px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  font-size: 13px;
  color: rgba(255, 255, 255, 0.78);
}

/* ---------- Contact ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 64px;
  align-items: start;
}

.contact-info > p {
  color: var(--muted);
  font-size: 17px;
  margin-bottom: 36px;
}

.contact-rows {
  display: grid;
  gap: 22px;
}

.contact-row {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.contact-ico {
  flex: 0 0 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--brand-soft);
  color: var(--brand);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 700;
}

.contact-row .label {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 3px;
}

.contact-row .value {
  font-size: 16px;
  font-weight: 500;
  color: var(--ink);
}

.contact-row a.value:hover {
  color: var(--brand);
}

.contact-card {
  background: var(--fog);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 36px;
}

.contact-card h3 {
  font-size: 18px;
  margin-bottom: 8px;
}

.contact-card p {
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 24px;
}

.contact-card .btn {
  width: 100%;
}

.contact-legal {
  margin-top: 16px;
  font-size: 12px;
  color: var(--muted);
}

/* ---------- Footer ---------- */
.footer {
  border-top: 1px solid var(--line);
  padding: 36px 0;
  background: var(--paper);
}

.footer .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.footer p {
  font-size: 13px;
  color: var(--muted);
}

.footer .foot-brand {
  font-weight: 700;
  color: var(--ink);
  letter-spacing: 0.04em;
}

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .section {
    padding: 80px 0;
  }

  .about-grid,
  .trademark-grid,
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .pipeline,
  .market-grid {
    grid-template-columns: 1fr;
  }

  .pipe-step .step-arrow {
    display: none;
  }
}

@media (max-width: 720px) {
  .nav-links {
    position: fixed;
    inset: 68px 0 auto 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    padding: 0 24px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
  }

  .nav-links.open {
    max-height: 380px;
    padding: 16px 24px 24px;
  }

  .nav-links a {
    display: block;
    width: 100%;
    padding: 14px 0;
    border-bottom: 1px solid var(--fog);
    font-size: 16px;
  }

  .nav-cta {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .hero {
    padding-top: 120px;
  }

  .hero-stats {
    gap: 28px;
  }

  .hero-stat strong {
    font-size: 24px;
  }

  .company-card,
  .contact-card,
  .trademark-card {
    padding: 28px 22px;
  }

  .footer .container {
    flex-direction: column;
    text-align: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
}