/* =====================================================
   Silver Soft — premium black & white corporate style
   ===================================================== */

:root {
  --black: #0a0a0a;
  --black-soft: #111113;
  --white: #ffffff;
  --gray-50: #f6f6f7;
  --gray-100: #ececee;
  --gray-300: #c9c9cd;
  --gray-500: #8a8a92;
  --gray-700: #4a4a52;
  --line: rgba(10, 10, 10, 0.1);
  --line-dark: rgba(255, 255, 255, 0.12);
  --radius: 18px;
  --font-display: "Inter Tight", "Inter", system-ui, sans-serif;
  --font-body: "Inter", system-ui, sans-serif;
  --container: 1200px;
  --transition: 0.35s cubic-bezier(0.22, 1, 0.36, 1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--black);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 28px;
}

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(2rem, 4.2vw, 3.2rem);
}

h3 { font-size: 1.25rem; }

.muted { color: var(--gray-500); }
.accent { position: relative; white-space: nowrap; }
.accent::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 0.08em;
  height: 0.08em;
  background: linear-gradient(90deg, #fff, rgba(255,255,255,0.25));
  border-radius: 2px;
}

/* ---------- Reveal animation ---------- */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s var(--transition);
}
.reveal.is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 16px 32px;
  border-radius: 100px;
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition), color var(--transition);
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

.btn--light { background: var(--white); color: var(--black); }
.btn--light:hover { box-shadow: 0 12px 32px rgba(255, 255, 255, 0.18); }

.btn--dark { background: var(--black); color: var(--white); }
.btn--dark:hover { box-shadow: 0 12px 32px rgba(10, 10, 10, 0.25); }

.btn--ghost {
  background: transparent;
  color: var(--white);
  border-color: var(--line-dark);
}
.btn--ghost:hover { background: rgba(255, 255, 255, 0.08); }

.btn--small { padding: 10px 22px; font-size: 0.85rem; }
.btn--full { width: 100%; }

/* ---------- Header ---------- */
.header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  transition: background var(--transition), box-shadow var(--transition);
}
.header.is-scrolled {
  background: rgba(10, 10, 10, 0.82);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 1px 0 var(--line-dark);
}
.header__inner {
  display: flex;
  align-items: center;
  gap: 32px;
  height: 76px;
}
.header__logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--white);
}
.logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px; height: 36px;
  border-radius: 10px;
  background: var(--white);
  color: var(--black);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.15rem;
}
.logo-text {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 500;
  letter-spacing: -0.01em;
}
.logo-text b { font-weight: 800; }

.header__nav {
  display: flex;
  gap: 26px;
  margin-left: auto;
}
.header__nav a {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--gray-300);
  transition: color var(--transition);
}
.header__nav a:hover { color: var(--white); }

.burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: 0;
  padding: 8px;
  cursor: pointer;
}
.burger span {
  width: 24px; height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}
.burger.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.burger.is-open span:nth-child(2) { opacity: 0; }
.burger.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  background: var(--black);
  color: var(--white);
  padding: 190px 0 110px;
  overflow: hidden;
}
.hero__bg { position: absolute; inset: 0; pointer-events: none; }
.hero__grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.045) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: radial-gradient(ellipse 90% 70% at 50% 20%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 90% 70% at 50% 20%, #000 30%, transparent 75%);
}
.hero__glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(110px);
}
.hero__glow--1 {
  width: 560px; height: 560px;
  background: rgba(255, 255, 255, 0.07);
  top: -220px; right: -120px;
}
.hero__glow--2 {
  width: 420px; height: 420px;
  background: rgba(255, 255, 255, 0.05);
  bottom: -200px; left: -100px;
}
.hero__inner { position: relative; }
.hero__tag {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gray-300);
  border: 1px solid var(--line-dark);
  border-radius: 100px;
  padding: 9px 20px;
  margin-bottom: 34px;
  background: rgba(255, 255, 255, 0.04);
  backdrop-filter: blur(6px);
}
.hero__title {
  font-size: clamp(2.6rem, 6.4vw, 5.2rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  max-width: 18ch;
}
.hero__subtitle {
  margin-top: 28px;
  max-width: 640px;
  font-size: 1.15rem;
  color: var(--gray-300);
}
.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 42px;
}
.hero__stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
  margin-top: 90px;
  padding-top: 42px;
  border-top: 1px solid var(--line-dark);
}
.stat__value {
  display: block;
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}
.stat__label {
  display: block;
  margin-top: 6px;
  font-size: 0.85rem;
  color: var(--gray-500);
  max-width: 24ch;
}

/* ---------- Sections ---------- */
.section { padding: 110px 0; }
.section--dark { background: var(--black); color: var(--white); }
.section--gray { background: var(--gray-50); }

.section__head { max-width: 720px; margin-bottom: 64px; }
.section__num {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--gray-500);
  margin-bottom: 18px;
}
.section__num::after {
  content: "";
  display: inline-block;
  width: 48px; height: 1px;
  background: currentColor;
  vertical-align: middle;
  margin-left: 14px;
  opacity: 0.5;
}
.section__head p {
  margin-top: 20px;
  font-size: 1.08rem;
  color: var(--gray-700);
}
.section--dark .section__head p { color: var(--gray-300); }

/* ---------- Grids & cards ---------- */
.grid { display: grid; gap: 22px; }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }

.card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 34px 28px;
  background: var(--white);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.card:hover {
  transform: translateY(-6px);
  box-shadow: 0 24px 48px rgba(10, 10, 10, 0.08);
  border-color: rgba(10, 10, 10, 0.22);
}
.card h3 { margin-bottom: 12px; }
.card p { color: var(--gray-700); font-size: 0.95rem; }

.card__icon {
  width: 52px; height: 52px;
  border-radius: 14px;
  background: var(--black);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
}
.card__icon svg {
  width: 26px; height: 26px;
  fill: none;
  stroke: var(--white);
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.card--dark {
  background: rgba(255, 255, 255, 0.04);
  border-color: var(--line-dark);
  backdrop-filter: blur(8px);
}
.card--dark:hover {
  border-color: rgba(255, 255, 255, 0.35);
  box-shadow: 0 24px 48px rgba(0, 0, 0, 0.45);
}
.card--dark p { color: var(--gray-300); }

.card__tag {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gray-300);
  border: 1px solid var(--line-dark);
  border-radius: 100px;
  padding: 6px 14px;
  margin-bottom: 20px;
}

/* ---------- Feemer block ---------- */
.feemer {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 60px;
  align-items: center;
}
.feemer__points {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 36px 32px;
}
.point h3 { margin-bottom: 10px; font-size: 1.1rem; }
.point p { color: var(--gray-300); font-size: 0.93rem; }
.point {
  padding-left: 18px;
  border-left: 1px solid var(--line-dark);
}

.chat {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--line-dark);
  border-radius: 22px;
  padding: 22px;
  backdrop-filter: blur(10px);
  box-shadow: 0 32px 80px rgba(0, 0, 0, 0.5);
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: 440px;
}
.chat__header {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--gray-300);
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line-dark);
  margin-bottom: 4px;
}
.chat__dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--white);
  box-shadow: 0 0 12px rgba(255, 255, 255, 0.8);
}
.chat__msg {
  max-width: 85%;
  padding: 12px 16px;
  border-radius: 16px;
  font-size: 0.9rem;
  line-height: 1.5;
}
.chat__msg--user {
  align-self: flex-end;
  background: var(--white);
  color: var(--black);
  border-bottom-right-radius: 4px;
}
.chat__msg--bot {
  align-self: flex-start;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--line-dark);
  color: var(--gray-100);
  border-bottom-left-radius: 4px;
}
.chat__msg i { color: var(--gray-500); font-style: normal; font-size: 0.84rem; }

/* ---------- Steps ---------- */
.steps {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 18px;
  counter-reset: step;
}
.step {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 22px;
  background: var(--white);
  transition: transform var(--transition), box-shadow var(--transition);
}
.step:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 40px rgba(10, 10, 10, 0.08);
}
.step__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px; height: 40px;
  border-radius: 50%;
  background: var(--black);
  color: var(--white);
  font-family: var(--font-display);
  font-weight: 700;
  margin-bottom: 20px;
}
.step h3 { font-size: 1.05rem; margin-bottom: 8px; }
.step p { font-size: 0.88rem; color: var(--gray-700); }

/* ---------- Split (clients/partners) ---------- */
.split {
  display: grid;
  grid-template-columns: 1fr 1px 1fr;
  gap: 56px;
}
.split__divider { background: var(--line); }
.split__title {
  font-size: 1.6rem;
  margin-bottom: 28px;
}
.list { margin-bottom: 36px; }
.list li {
  position: relative;
  padding: 12px 0 12px 34px;
  border-bottom: 1px solid var(--line);
  color: var(--gray-700);
  font-size: 0.97rem;
}
.list li::before {
  content: "";
  position: absolute;
  left: 4px; top: 20px;
  width: 14px; height: 8px;
  border-left: 2px solid var(--black);
  border-bottom: 2px solid var(--black);
  transform: rotate(-45deg);
}

/* ---------- Advantages ---------- */
.adv {
  display: flex;
  gap: 18px;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
  transition: transform var(--transition), box-shadow var(--transition);
}
.adv:hover {
  transform: translateY(-4px);
  box-shadow: 0 18px 36px rgba(10, 10, 10, 0.07);
}
.adv span {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.1rem;
  color: var(--gray-300);
}
.adv p { font-size: 0.92rem; color: var(--gray-700); }
.adv b { color: var(--black); }

/* ---------- Cases ---------- */
.case {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 36px 32px;
  background: linear-gradient(160deg, var(--white) 60%, var(--gray-50));
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.case:hover {
  transform: translateY(-6px);
  box-shadow: 0 24px 48px rgba(10, 10, 10, 0.08);
  border-color: rgba(10, 10, 10, 0.22);
}
.case--wide { grid-column: 1 / -1; }
.case__tag {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  background: var(--black);
  color: var(--white);
  border-radius: 100px;
  padding: 7px 15px;
  margin-bottom: 22px;
}
.case h3 { margin-bottom: 12px; font-size: 1.3rem; }
.case p { color: var(--gray-700); font-size: 0.96rem; max-width: 70ch; }

/* ---------- Contact ---------- */
.contact {
  display: grid;
  grid-template-columns: 1fr 1.15fr;
  gap: 70px;
  align-items: start;
}
.contact__info p {
  margin-top: 20px;
  color: var(--gray-300);
  font-size: 1.05rem;
  max-width: 44ch;
}
.contact__list { margin-top: 40px; }
.contact__list li {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line-dark);
  font-size: 1.02rem;
}
.contact__list span {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gray-500);
}
.contact__list a { transition: opacity var(--transition); }
.contact__list a:hover { opacity: 0.7; }

.form {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--line-dark);
  border-radius: 24px;
  padding: 38px;
  backdrop-filter: blur(10px);
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.form__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}
.field { display: flex; flex-direction: column; gap: 8px; }
.field span {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--gray-500);
}
.field input,
.field select,
.field textarea {
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--white);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--line-dark);
  border-radius: 12px;
  padding: 14px 16px;
  outline: none;
  transition: border-color var(--transition), background var(--transition);
  resize: vertical;
}
.field select option { color: var(--black); }
.field input::placeholder,
.field textarea::placeholder { color: var(--gray-700); }
.field input:focus,
.field select:focus,
.field textarea:focus {
  border-color: rgba(255, 255, 255, 0.5);
  background: rgba(255, 255, 255, 0.1);
}
.field input.is-invalid { border-color: rgba(255, 120, 120, 0.7); }

.form__note {
  font-size: 0.78rem;
  color: var(--gray-500);
  text-align: center;
}
.form__success {
  text-align: center;
  font-weight: 600;
  padding: 14px;
  border: 1px solid var(--line-dark);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.08);
}

/* ---------- Footer ---------- */
.footer {
  background: var(--black);
  color: var(--white);
  border-top: 1px solid var(--line-dark);
  padding: 56px 0;
}
.footer__inner {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 40px;
  align-items: start;
}
.footer__brand p {
  margin-top: 16px;
  color: var(--gray-500);
  font-size: 0.9rem;
}
.footer__nav {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer__nav a {
  font-size: 0.9rem;
  color: var(--gray-300);
  transition: color var(--transition);
}
.footer__nav a:hover { color: var(--white); }
.footer__meta {
  text-align: right;
  color: var(--gray-500);
  font-size: 0.85rem;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

/* =====================================================
   Responsive
   ===================================================== */
@media (max-width: 1024px) {
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .grid--3 { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .feemer { grid-template-columns: 1fr; gap: 48px; }
  .feemer__chat { display: flex; justify-content: center; }
  .contact { grid-template-columns: 1fr; gap: 48px; }
  .hero__stats { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .section { padding: 80px 0; }
  .hero { padding: 150px 0 80px; }

  .header__nav {
    position: fixed;
    top: 76px;
    left: 0; right: 0;
    flex-direction: column;
    gap: 0;
    background: rgba(10, 10, 10, 0.97);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--line-dark);
    padding: 12px 28px 24px;
    transform: translateY(-12px);
    opacity: 0;
    visibility: hidden;
    transition: transform var(--transition), opacity var(--transition), visibility var(--transition);
  }
  .header__nav.is-open {
    transform: none;
    opacity: 1;
    visibility: visible;
  }
  .header__nav a {
    padding: 14px 0;
    font-size: 1.05rem;
    border-bottom: 1px solid var(--line-dark);
  }
  .header__cta { display: none; }
  .burger { display: flex; margin-left: auto; }

  .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .split { grid-template-columns: 1fr; gap: 48px; }
  .split__divider { display: none; }
  .form__row { grid-template-columns: 1fr; }
  .form { padding: 26px 20px; }
  .footer__inner { grid-template-columns: 1fr; }
  .footer__meta { text-align: left; }
  .hero__stats { gap: 22px; margin-top: 64px; }
}

@media (max-width: 480px) {
  .hero__stats { grid-template-columns: 1fr 1fr; }
  .btn { width: 100%; }
  .hero__actions .btn { width: 100%; }
}