:root {
  --primary-blue: #5271FF;
  --primary-blue-dark: #3F5EE8;
  --primary-blue-light: #EEF1FF;
  --primary-blue-soft: #F7F8FF;
  --dark-text: #242424;
  --body-text: #606060;
  --border-color: #E8E8E8;
  --white: #FFFFFF;
  --max-width: 1200px;
  --header-height: 80px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Plus Jakarta Sans', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-weight: 400;
  font-size: 16px;
  line-height: 1.6;
  color: var(--body-text);
  background: var(--white);
  overflow-x: hidden;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

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

ul {
  list-style: none;
}

address {
  font-style: normal;
}

/* ============================================
   BUTTONS
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 32px;
  font-family: inherit;
  font-size: 15px;
  font-weight: 600;
  border-radius: 40px;
  cursor: pointer;
  transition: background 0.25s ease, color 0.25s ease, border-color 0.25s ease, transform 0.2s ease, box-shadow 0.25s ease;
  line-height: 1.3;
  white-space: nowrap;
}

.btn:active {
  transform: scale(0.97);
}

.btn--primary {
  background: var(--primary-blue);
  color: var(--white);
  border: 2px solid var(--primary-blue);
}

.btn--primary:hover {
  background: var(--primary-blue-dark);
  border-color: var(--primary-blue-dark);
}

.btn--outline {
  background: var(--white);
  color: var(--primary-blue);
  border: 2px solid var(--primary-blue);
}

.btn--outline:hover {
  background: var(--primary-blue-light);
}

.btn--white {
  background: var(--white);
  color: var(--primary-blue);
  border: 2px solid var(--white);
}

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

.btn--full {
  width: 100%;
}

/* ============================================
   SECTION SHARED
   ============================================ */

.section__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.section__eyebrow {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--primary-blue);
  margin-bottom: 16px;
}

.section__headline {
  font-size: 42px;
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -0.02em;
  color: var(--dark-text);
  margin-bottom: 24px;
}

.section__supporting {
  font-size: 17px;
  font-weight: 400;
  line-height: 1.7;
  color: var(--body-text);
}

/* ============================================
   HEADER
   ============================================ */

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-height);
  transition: background 0.3s ease, box-shadow 0.3s ease;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(8px);
}

.header.scrolled {
  background: var(--white);
  box-shadow: 0 1px 0 var(--border-color);
}

.header__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header__brand {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-shrink: 0;
}

.header__logo {
  width: auto;
  height: 40px;
  max-width: 120px;
}

.header__company-name {
  font-size: 13px;
  font-weight: 600;
  color: var(--dark-text);
  line-height: 1.3;
  max-width: 160px;
  display: none;
}

@media (min-width: 1024px) {
  .header__company-name {
    display: block;
  }
}

.header__nav {
  display: flex;
  align-items: center;
  gap: 36px;
}

@media (max-width: 899px) {
  .header__nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: var(--white);
    flex-direction: column;
    justify-content: center;
    gap: 32px;
    padding: 48px 32px;
    transition: right 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: -4px 0 24px rgba(0, 0, 0, 0.06);
  }

  .header__nav.active {
    right: 0;
  }
}

.header__nav-list {
  display: flex;
  align-items: center;
  gap: 32px;
}

@media (max-width: 899px) {
  .header__nav-list {
    flex-direction: column;
    align-items: flex-start;
    gap: 24px;
  }
}

.header__nav-link {
  font-size: 15px;
  font-weight: 600;
  color: var(--dark-text);
  transition: color 0.2s ease;
  position: relative;
}

.header__nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary-blue);
  border-radius: 2px;
  transition: width 0.25s ease;
}

.header__nav-link:hover,
.header__nav-link:focus-visible {
  color: var(--primary-blue);
}

.header__nav-link:hover::after,
.header__nav-link:focus-visible::after {
  width: 100%;
}

.header__cta {
  padding: 10px 24px;
  font-size: 14px;
}

/* Hamburger */

.header__hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  z-index: 1001;
}

@media (max-width: 899px) {
  .header__hamburger {
    display: flex;
  }
}

.header__hamburger-line {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--dark-text);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.header__hamburger.active .header__hamburger-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.header__hamburger.active .header__hamburger-line:nth-child(2) {
  opacity: 0;
}

.header__hamburger.active .header__hamburger-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Nav overlay */

.nav-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.3);
  z-index: 999;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.nav-overlay.active {
  display: block;
  opacity: 1;
}

/* ============================================
   HERO
   ============================================ */

.hero {
  padding-top: calc(var(--header-height) + 60px);
  padding-bottom: 80px;
  overflow: hidden;
}

.hero__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.hero__eyebrow {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--primary-blue);
  margin-bottom: 20px;
}

.hero__headline {
  font-size: 56px;
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.025em;
  color: var(--primary-blue);
  margin-bottom: 24px;
}

.hero__subheadline {
  font-size: 20px;
  font-weight: 600;
  color: var(--dark-text);
  line-height: 1.4;
  margin-bottom: 16px;
}

.hero__body {
  font-size: 16px;
  font-weight: 400;
  color: var(--body-text);
  line-height: 1.7;
  margin-bottom: 32px;
  max-width: 480px;
}

.hero__buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

/* Hero Visual */

.hero__visual {
  position: relative;
  height: 480px;
}

.hero__deco {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
}

.hero__deco--circle {
  width: 220px;
  height: 220px;
  background: var(--primary-blue);
  opacity: 0.06;
  top: 20px;
  right: 40px;
}

.hero__deco--blob {
  width: 280px;
  height: 280px;
  background: var(--primary-blue);
  opacity: 0.04;
  top: 160px;
  left: 10px;
  border-radius: 60% 40% 70% 30% / 50% 60% 40% 50%;
}

.hero__deco--wave {
  width: 400px;
  height: 200px;
  background: radial-gradient(ellipse at center, rgba(82, 113, 255, 0.05) 0%, transparent 70%);
  bottom: -20px;
  right: -40px;
  border-radius: 0;
}

.hero__image {
  position: absolute;
  border-radius: 80px 24px 80px 24px;
  overflow: hidden;
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.06);
}

.hero__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.hero__image--1 {
  width: 200px;
  height: 260px;
  top: 20px;
  left: 20px;
  z-index: 3;
  border-radius: 100px 24px 24px 24px;
}

.hero__image--2 {
  width: 240px;
  height: 290px;
  top: 60px;
  right: 10px;
  z-index: 2;
  border-radius: 24px 24px 90px 24px;
}

.hero__image--3 {
  width: 180px;
  height: 220px;
  bottom: 10px;
  left: 100px;
  z-index: 1;
  border-radius: 24px 24px 24px 80px;
}

/* ============================================
   SERVICES
   ============================================ */

.services {
  padding: 100px 0;
}

.services .section__headline {
  text-align: center;
}

.services .section__supporting {
  text-align: center;
  margin: 0 auto 64px;
  max-width: 640px;
}

.services__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

/* Service Card */

.service-card {
  background: var(--white);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 40px 32px 36px;
  transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1), border-color 0.35s ease, box-shadow 0.35s ease;
  cursor: default;
}

.service-card:hover {
  transform: translateY(-4px);
  border-color: var(--primary-blue-light);
  box-shadow: 0 12px 36px rgba(82, 113, 255, 0.08);
}

.service-card__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  border-radius: 18px;
  background: var(--primary-blue-light);
  color: var(--primary-blue);
  margin-bottom: 28px;
  transition: background 0.35s ease, color 0.35s ease;
}

.service-card:hover .service-card__icon {
  background: var(--primary-blue);
  color: var(--white);
}

.service-card__title {
  font-size: 19px;
  font-weight: 700;
  color: var(--dark-text);
  margin-bottom: 12px;
  line-height: 1.3;
}

.service-card__desc {
  font-size: 15px;
  font-weight: 400;
  color: var(--body-text);
  line-height: 1.65;
}

/* ============================================
   ABOUT
   ============================================ */

.about {
  padding: 0 0 100px;
}

.about__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 72px;
  align-items: center;
}

.about__image-wrapper {
  position: relative;
}

.about__deco {
  position: absolute;
  width: 260px;
  height: 260px;
  background: var(--primary-blue);
  opacity: 0.05;
  border-radius: 60% 40% 70% 30% / 40% 50% 45% 55%;
  top: -24px;
  left: -24px;
  z-index: 0;
  pointer-events: none;
}

.about__image {
  position: relative;
  z-index: 1;
  border-radius: 28px;
  overflow: hidden;
}

.about__image img {
  width: 100%;
  height: 480px;
  object-fit: cover;
  display: block;
}

.about__content .section__headline {
  margin-bottom: 24px;
}

.about__body {
  font-size: 16px;
  font-weight: 400;
  color: var(--body-text);
  line-height: 1.7;
  margin-bottom: 16px;
  max-width: 480px;
}

.about__values {
  margin-top: 32px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.about__value {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 16px;
  font-weight: 600;
  color: var(--dark-text);
}

.about__check {
  flex-shrink: 0;
}

/* ============================================
   WHY ISS
   ============================================ */

.why-iss {
  padding: 100px 0;
  background: var(--primary-blue-soft);
}

.why-iss .section__headline {
  margin-bottom: 56px;
}

.why-iss__blocks {
  display: flex;
  gap: 0;
}

.why-iss__block {
  flex: 1;
  padding: 0 32px 0 0;
}

.why-iss__number {
  display: block;
  font-size: 48px;
  font-weight: 800;
  color: var(--primary-blue);
  line-height: 1;
  margin-bottom: 20px;
}

.why-iss__title {
  font-size: 20px;
  font-weight: 700;
  color: var(--dark-text);
  margin-bottom: 12px;
}

.why-iss__desc {
  font-size: 15px;
  font-weight: 400;
  color: var(--body-text);
  line-height: 1.65;
  max-width: 320px;
}

.why-iss__divider {
  width: 1px;
  background: var(--border-color);
  flex-shrink: 0;
  margin: 8px 0;
}

/* ============================================
   BRAND STATEMENT
   ============================================ */

.brand-statement {
  padding: 100px 0;
  position: relative;
  overflow: hidden;
}

.brand-statement__inner {
  position: relative;
  text-align: center;
}

.brand-statement__deco {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 100%;
  max-width: 700px;
  height: 200px;
  color: var(--primary-blue);
  pointer-events: none;
  z-index: 0;
}

.brand-statement__text {
  position: relative;
  z-index: 1;
  font-size: 52px;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.brand-statement__line {
  display: block;
  color: var(--dark-text);
}

.brand-statement__line--accent {
  color: var(--primary-blue);
}

/* ============================================
   CTA
   ============================================ */

.cta {
  padding: 80px 0;
}

.cta__inner {
  background: var(--primary-blue);
  border-radius: 32px;
  padding: 72px 48px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta__deco {
  position: absolute;
  top: 0;
  right: 0;
  width: 400px;
  height: 300px;
  color: var(--white);
  pointer-events: none;
}

.cta__headline {
  font-size: 42px;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--white);
  margin-bottom: 20px;
  position: relative;
  z-index: 1;
}

.cta__body {
  font-size: 17px;
  font-weight: 400;
  color: rgba(255, 255, 255, 0.85);
  line-height: 1.65;
  max-width: 560px;
  margin: 0 auto 36px;
  position: relative;
  z-index: 1;
}

/* ============================================
   CONTACT
   ============================================ */

.contact {
  padding: 0 0 100px;
}

.contact__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 72px;
}

.contact__info .section__headline {
  margin-bottom: 36px;
}

.contact__company-name {
  font-size: 18px;
  font-weight: 700;
  color: var(--dark-text);
  margin-bottom: 8px;
}

.contact__address {
  font-size: 15px;
  line-height: 1.65;
  color: var(--body-text);
  margin-bottom: 24px;
}

.contact__details {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.contact__detail {
  display: flex;
  gap: 8px;
  font-size: 15px;
}

.contact__label {
  font-weight: 600;
  color: var(--dark-text);
  min-width: 56px;
}

.contact__value {
  color: var(--body-text);
}

.contact__value--placeholder {
  color: #a0a0a0;
}

/* Contact Form */

.contact__form-wrapper {
  background: var(--white);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 40px;
}

.contact__form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--dark-text);
}

.form-input {
  font-family: inherit;
  font-size: 15px;
  padding: 14px 16px;
  border: 1px solid var(--border-color);
  border-radius: 12px;
  color: var(--dark-text);
  background: var(--white);
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
  outline: none;
  resize: vertical;
}

.form-input::placeholder {
  color: #b0b0b0;
}

.form-input:focus {
  border-color: var(--primary-blue);
  box-shadow: 0 0 0 3px rgba(82, 113, 255, 0.1);
}

.form-input.error {
  border-color: #e74c3c;
}

.form-textarea {
  min-height: 120px;
}

.form-error {
  font-size: 13px;
  font-weight: 500;
  color: #e74c3c;
  min-height: 18px;
}

/* ============================================
   FOOTER
   ============================================ */

.footer {
  background: var(--primary-blue-soft);
  padding: 72px 0 0;
}

.footer__inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
}

.footer__logo {
  width: auto;
  height: 34px;
  margin-bottom: 16px;
}

.footer__company-name {
  font-size: 14px;
  font-weight: 700;
  color: var(--dark-text);
  margin-bottom: 4px;
}

.footer__tagline {
  font-size: 14px;
  font-weight: 400;
  color: var(--body-text);
}

.footer__links-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--dark-text);
  margin-bottom: 16px;
}

.footer__links-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer__link {
  font-size: 14px;
  font-weight: 500;
  color: var(--body-text);
  transition: color 0.2s ease;
}

.footer__link:hover {
  color: var(--primary-blue);
}

.footer__address-text {
  font-size: 14px;
  line-height: 1.65;
  color: var(--body-text);
}

.footer__bottom {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px 32px;
}

.footer__divider {
  border: none;
  border-top: 1px solid var(--border-color);
  margin-bottom: 24px;
}

.footer__copyright {
  font-size: 13px;
  font-weight: 400;
  color: var(--body-text);
  text-align: center;
}

/* ============================================
   NOTIFICATION
   ============================================ */

.notification {
  position: fixed;
  bottom: 32px;
  right: 32px;
  background: #2ecc71;
  color: var(--white);
  padding: 16px 24px;
  border-radius: 14px;
  font-size: 15px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 10px;
  box-shadow: 0 8px 28px rgba(46, 204, 113, 0.3);
  transform: translateY(120px);
  opacity: 0;
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.3s ease;
  z-index: 2000;
  pointer-events: none;
}

.notification.show {
  transform: translateY(0);
  opacity: 1;
}

/* ============================================
   REVEAL ANIMATION
   ============================================ */

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* ============================================
   RESPONSIVE — Tablet (max 1024px)
   ============================================ */

@media (max-width: 1024px) {
  .section__headline {
    font-size: 34px;
  }

  .hero__inner {
    grid-template-columns: 1fr 1fr;
    gap: 40px;
  }

  .hero__headline {
    font-size: 42px;
  }

  .hero__visual {
    height: 400px;
  }

  .hero__image--1 { width: 160px; height: 220px; left: 0; }
  .hero__image--2 { width: 200px; height: 250px; right: 0; }
  .hero__image--3 { width: 150px; height: 190px; left: 60px; }

  .services__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .about__grid {
    gap: 48px;
  }

  .brand-statement__text {
    font-size: 40px;
  }

  .cta__headline {
    font-size: 34px;
  }

  .contact__grid {
    gap: 48px;
  }
}

/* ============================================
   RESPONSIVE — Small Tablet / Large Mobile (max 899px)
   ============================================ */

@media (max-width: 899px) {
  .section__headline {
    font-size: 30px;
  }

  .hero {
    padding-top: calc(var(--header-height) + 40px);
    padding-bottom: 48px;
  }

  .hero__inner {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .hero__content {
    order: 1;
  }

  .hero__visual {
    order: 2;
    height: 340px;
  }

  .hero__headline {
    font-size: 36px;
  }

  .hero__image--1 { width: 150px; height: 200px; top: 10px; left: 0; }
  .hero__image--2 { width: 180px; height: 230px; top: 40px; right: 0; }
  .hero__image--3 { width: 140px; height: 180px; bottom: 0; left: 80px; }

  .services {
    padding: 72px 0;
  }

  .services__grid {
    gap: 20px;
  }

  .service-card {
    padding: 32px 24px 28px;
  }

  .about {
    padding: 0 0 72px;
  }

  .about__grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .about__image img {
    height: 360px;
  }

  .why-iss {
    padding: 72px 0;
  }

  .why-iss__blocks {
    flex-direction: column;
    gap: 32px;
  }

  .why-iss__block {
    padding: 0;
  }

  .why-iss__divider {
    width: 100%;
    height: 1px;
    margin: 0;
  }

  .brand-statement {
    padding: 72px 0;
  }

  .brand-statement__text {
    font-size: 32px;
  }

  .cta {
    padding: 60px 0;
  }

  .cta__inner {
    padding: 48px 28px;
    border-radius: 24px;
  }

  .cta__headline {
    font-size: 28px;
  }

  .contact__grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .contact__form-wrapper {
    padding: 28px;
  }

  .footer__inner {
    grid-template-columns: 1fr 1fr;
    gap: 36px;
  }
}

/* ============================================
   RESPONSIVE — Mobile (max 600px)
   ============================================ */

@media (max-width: 600px) {
  .section__headline {
    font-size: 28px;
  }

  .btn {
    padding: 12px 24px;
    font-size: 14px;
  }

  .hero__headline {
    font-size: 32px;
  }

  .hero__subheadline {
    font-size: 17px;
  }

  .hero__buttons {
    flex-direction: column;
  }

  .hero__buttons .btn {
    width: 100%;
    text-align: center;
  }

  .hero__visual {
    height: 280px;
  }

  .hero__image--1 { width: 120px; height: 170px; top: 0; left: 0; }
  .hero__image--2 { width: 150px; height: 190px; top: 30px; right: 0; }
  .hero__image--3 { width: 110px; height: 150px; bottom: 0; left: 50px; }

  .services__grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .brand-statement__text {
    font-size: 26px;
  }

  .cta__headline {
    font-size: 26px;
  }

  .contact__form-wrapper {
    padding: 24px;
  }

  .footer__inner {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .notification {
    left: 24px;
    right: 24px;
    bottom: 20px;
  }
}

/* ============================================
   FOCUS VISIBLE (Accessibility)
   ============================================ */

:focus-visible {
  outline: 2px solid var(--primary-blue);
  outline-offset: 2px;
  border-radius: 4px;
}

.header__hamburger:focus-visible {
  outline-offset: 0px;
}