:root {
  --color-bg: #0A4467;
  --color-accent: #EF7F1A;
  --color-muted: #727271;
  --glass: rgba(255, 255, 255, 0.12);
  --glass-strong: rgba(255, 255, 255, 0.2);
  --shadow-sm: 0 10px 18px rgba(0, 0, 0, 0.16);
  --shadow-md: 0 14px 32px rgba(0, 0, 0, 0.18);
  --radius: 24px;
  --max-width: 1160px;
  --font: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);

  --page-bg: radial-gradient(circle at 15% 20%, rgba(239, 127, 26, 0.32), transparent 58%),
    radial-gradient(circle at 85% 20%, rgba(255, 255, 255, 0.14), transparent 60%),
    linear-gradient(140deg, #0A4467 0%, #082f51 40%, #041b2c 100%);
  --text-main: rgba(255, 255, 255, 0.94);
  --text-muted: rgba(255, 255, 255, 0.78);
  --header-bg: rgba(10, 68, 103, 0.4);
  --card-bg: rgba(255, 255, 255, 0.08);
  --card-border: rgba(255, 255, 255, 0.14);
  --button-bg: rgba(239, 127, 26, 0.18);
  --button-color: rgba(255, 255, 255, 0.95);
  --button-hover: rgba(255, 255, 255, 0.18);
  --nav-hover: rgba(255, 255, 255, 0.12);
  --logo-bg: rgba(255, 255, 255, 0.12);
  --logo-border: rgba(255, 255, 255, 0.14);
  --iframe-bg: rgba(255, 255, 255, 0.08);
  --iframe-border: rgba(255, 255, 255, 0.14);
}

.theme-light {
  --page-bg: linear-gradient(135deg, #f8fafc 0%, #eef2f7 55%, #d9e2ec 100%);
  --text-main: rgba(15, 23, 42, 0.92);
  --text-muted: rgba(55, 65, 81, 0.8);
  --header-bg: rgba(255, 255, 255, 0.7);
  --card-bg: rgba(255, 255, 255, 0.64);
  --card-border: rgba(15, 23, 42, 0.12);
  --button-bg: rgba(239, 127, 26, 0.21);
  --button-color: rgba(15, 23, 42, 0.9);
  --button-hover: rgba(15, 23, 42, 0.12);
  --nav-hover: rgba(15, 23, 42, 0.06);
  --logo-bg: rgba(255, 255, 255, 0.72);
  --logo-border: rgba(15, 23, 42, 0.14);
  --iframe-bg: rgba(255, 255, 255, 0.95);
  --iframe-border: rgba(15, 23, 42, 0.16);
  --hero-title-shadow: rgba(15, 23, 42, 0.14);
  --hero-subtitle-bg: rgba(255, 255, 255, 0.22);
  --hero-subtitle-shadow: rgba(0, 0, 0, 0.08);
}

.theme-dark {
  --page-bg: radial-gradient(circle at 15% 20%, rgba(239, 127, 26, 0.32), transparent 58%),
    radial-gradient(circle at 85% 20%, rgba(255, 255, 255, 0.14), transparent 60%),
    linear-gradient(140deg, #0A4467 0%, #082f51 40%, #041b2c 100%);
  --text-main: rgba(255, 255, 255, 0.94);
  --header-bg: rgba(10, 68, 103, 0.4);
  --card-bg: rgba(255, 255, 255, 0.08);
  --card-border: rgba(255, 255, 255, 0.14);
  --hero-title-shadow: rgba(0, 0, 0, 0.14);
  --hero-subtitle-bg: rgba(255, 255, 255, 0.12);
  --hero-subtitle-shadow: rgba(0, 0, 0, 0.14);
}

.theme-light .site-header {
  background: rgba(255, 255, 255, 0.7);
  border-bottom: 1px solid rgba(15, 23, 42, 0.14);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  color: var(--text-main);
  background: var(--page-bg);
}

main {
  padding-top: 4.5rem; /* отступ сверху, чтобы контент не “упирался” в фиксированную шапку */
}

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

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

.container {
  width: min(100% - 2.5rem, var(--max-width));
  margin: 0 auto;
}

.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  width: 100%;
  padding: 1.1rem 1.5rem;
  z-index: 999;
  display: flex;
  justify-content: center;
  align-items: center;
  backdrop-filter: blur(18px);
  background: var(--header-bg);
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.header-inner {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-size: 0.95rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-weight: 700;
  opacity: 0.9;
}

.brand__logo {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.14);
  box-shadow: 0 14px 26px rgba(0, 0, 0, 0.22);
  transition: transform 0.35s var(--ease);
  animation: logoPulse 3.5s infinite ease-in-out;
}

.brand:hover .brand__logo {
  transform: translateY(-2px);
}

@keyframes logoPulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.06); }
}

.brand__name {
  display: block;
}

.header-tools {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.theme-toggle {
  width: 44px;
  height: 44px;
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(255, 255, 255, 0.08);
  display: grid;
  place-items: center;
  cursor: pointer;
  transition: transform 0.3s var(--ease), background 0.3s var(--ease);
}

.theme-toggle:hover {
  transform: translateY(-2px);
  background: rgba(255, 255, 255, 0.14);
}

.theme-icon {
  font-size: 1.2rem;
  transition: transform 0.2s ease, opacity 0.2s ease, filter 0.2s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  opacity: 1;
  filter: blur(0px);
}

.theme-icon--blur {
  opacity: 0;
  filter: blur(3px);
}

.theme-toggle:hover .theme-icon {
  transform: scale(1.1);
}

.nav__icon {
  margin-right: 0.35rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.nav {
  display: flex;
  align-items: center;
  gap: 1.2rem;
  font-weight: 500;
  font-size: 0.95rem;
}

.nav__brand {
  display: none;
  align-items: center;
  gap: 0.6rem;
  padding: 0.4rem 0.6rem;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.14);
  backdrop-filter: blur(12px);
  margin-right: 0.5rem;
}

.nav--open .nav__brand {
  display: flex;
}

.nav__logo {
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
}

.nav__brand-name {
  font-weight: 700;
  font-size: 0.9rem;
  white-space: nowrap;
}

.nav__link {
  padding: 0.55rem 0.65rem;
  border-radius: 999px;
  transition: transform 0.3s var(--ease), background 0.3s var(--ease);
}

.nav__link:hover {
  transform: translateY(-2px);
  background: var(--nav-hover);
}

.theme-light .nav__link:hover {
  background: rgba(15, 23, 42, 0.06);
}

.nav__link--button {
  border: 1px solid var(--logo-border);
  background: var(--button-bg);
  color: var(--button-color);
}

.burger {
  display: none;
  width: 46px;
  height: 42px;
  background: var(--logo-bg);
  border: 1px solid var(--logo-border);
  border-radius: 14px;
  position: relative;
  cursor: pointer;
  transition: transform 0.4s var(--ease), background 0.25s ease;
}

.burger span {
  display: block;
  height: 2px;
  background: var(--text-main);
  border-radius: 999px;
  position: absolute;
  left: 50%;
  right: 14%;
  transform: translateX(-50%);
}

.burger span:nth-child(1) {
  top: 13px;
}

.burger span:nth-child(2) {
  top: 19px;
}

.burger span:nth-child(3) {
  top: 25px;
}

.nav--open {
  position: absolute;
  top: 100%;
  right: 1.5rem;
  background: rgba(10, 68, 103, 0.85);
  border: 1px solid var(--logo-border);
  border-radius: 18px;
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  width: min(240px, 80vw);
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(22px);
}

.burger--active {
  background: rgba(239, 127, 26, 0.22);
}

.burger--active span:nth-child(1) {
  top: 19px;
  transform: translateX(-50%) rotate(45deg);
}

.burger--active span:nth-child(2) {
  opacity: 0;
}

.burger--active span:nth-child(3) {
  top: 19px;
  transform: translateX(-50%) rotate(-45deg);
}
.hero {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 1.5rem 1.5rem 1.5rem;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 35% 25%, rgba(239, 127, 26, 0.22), transparent 55%),
    radial-gradient(circle at 70% 35%, rgba(255, 255, 255, 0.18), transparent 58%);
  pointer-events: none;
  mix-blend-mode: overlay;
}

.hero__inner {
  width: min(100%, 940px);
  display: grid;
  place-items: center;
}

.hero__content {
  width: 100%;
  padding: 2.8rem 2.2rem;
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.14), rgba(255, 255, 255, 0.06));
  border: 1px solid rgba(255, 255, 255, 0.18);
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(26px);
  overflow: hidden;
}

.hero__title {
  margin: 0;
  font-size: clamp(1.9rem, 4vw, 2.2rem);
  line-height: 1.12;
  font-weight: 800;
  letter-spacing: -0.01em;
  max-width: 880px;
  color: var(--text-main);
  text-shadow: 0 8px 16px var(--hero-title-shadow);
}

.hero__title span {
  display: inline-block;
  font-weight: 600;
  margin-top: 0.45rem;
  opacity: 0.96;
  font-size: 0.45em;
  letter-spacing: 0;
}

.hero__meta {
  margin-top: 2rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.2rem;
}

.hero__meta-item {
  padding: 1.1rem 1.25rem;
  border-radius: 18px;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow-sm);
  min-height: 120px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.meta__label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.14em;
}

.meta__value {
  display: block;
  margin-top: 0.55rem;
  font-size: 1.05rem;
  line-height: 1.45;
  font-weight: 500;
  color: var(--text-main);
}

.hero__actions {
  margin-top: 2.4rem;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.btn {
  position: relative;
  z-index: 2;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.9rem 1.5rem;
  gap: 0.55rem;
  border-radius: 999px;
  border: 1px solid var(--logo-border);
  font-weight: 700;
  font-size: 1.05rem;
  cursor: pointer;
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease), background 0.35s var(--ease);
  text-decoration: none;
  letter-spacing: 0.02em;
}

.btn--primary {
  background: linear-gradient(135deg, rgba(239, 127, 26, 0.94), rgba(239, 127, 26, 0.68));
  color: var(--button-color);
  box-shadow: 0 18px 40px rgba(14, 25, 39, 0.32);
}

.btn--secondary {
  background: rgba(255, 255, 255, 0.12);
  color: var(--text-main);
}

.theme-light .btn--secondary {
  background: rgba(15, 23, 42, 0.06);
  color: var(--text-main);
}

.btn--secondary:hover {
  background: var(--button-hover);
}

.btn:hover {
  transform: translateY(-3px) scale(1.005);
  box-shadow: 0 22px 44px rgba(14, 25, 39, 0.42);
}

.btn--secondary:hover {
  background: var(--button-hover);
}

.theme-light .btn {
  color: rgba(15, 23, 42, 0.88);
  border-color: rgba(15, 23, 42, 0.14);
}

.theme-light .btn--secondary {
  background: rgba(15, 23, 42, 0.06);
  color: rgba(15, 23, 42, 0.88);
}

.theme-light .btn--secondary:hover {
  background: rgba(15, 23, 42, 0.11);
}

.section {
  padding: 2.5rem 1.5rem 2.5rem;
  position: relative;
  overflow: hidden;
}

.section--alt {
  background: rgba(0, 0, 0, 0.12);
}

.section--about {
  padding-top: 3rem;
  padding-bottom: 3rem;
  background: rgba(255, 255, 255, 0.08);
}

.section__header--about {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 2.5rem;
}

.about-grid {
  display: grid;
  gap: 1.6rem;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  align-items: start;
}

.about-card {
  padding: 1.9rem 1.8rem;
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.18);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.2);
  backdrop-filter: blur(16px);
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease);
}

.about-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 24px 52px rgba(0, 0, 0, 0.22);
}

.about-card--highlight {
  background: rgba(239, 127, 26, 0.12);
  border-color: rgba(239, 127, 26, 0.22);
}

.about-card__title {
  margin: 0 0 0.75rem;
  font-size: 1.2rem;
  font-weight: 700;
}

.about-card__text {
  margin: 0 0 1.25rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.about-footer {
  margin-top: 2.5rem;
  text-align: center;
}

.about-footer__text {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
}

.section__header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 2rem;
}

.section__title {
  margin: 0;
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 700;
  line-height: 1.14;
}

.section__lead {
  margin: 1.25rem auto 0;
  color: var(--text-muted);
  font-size: 1.05rem;
  line-height: 1.7;
}

.section__text {
  margin-top: 1.4rem;
  color: var(--text-muted);
  font-size: 1.03rem;
  line-height: 1.7;
}

.grid {
  display: grid;
  gap: 1.7rem;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.card {
  position: relative;
  padding: 1.9rem 1.75rem;
  border-radius: var(--radius);
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(16px);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  overflow: hidden;
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease);
}

.card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(239, 127, 26, 0.26), rgba(10, 68, 103, 0.12));
  opacity: 0;
  transition: opacity 0.45s var(--ease);
}

.card:hover {
  transform: translateY(-10px);
  box-shadow: 0 26px 54px rgba(0, 0, 0, 0.32);
}

.card:hover::before {
  opacity: 1;
}

.card__title {
  margin: 0 0 1rem;
  font-size: 1.2rem;
  font-weight: 700;
  line-height: 1.25;
}

.card__text {
  margin: 0;
  color: var(--text-muted);
  line-height: 1.6;
  font-size: 1rem;
}

.card__footer {
  margin-top: 1.5rem;
  display: flex;
  justify-content: flex-end;
}

.form-wrap {
  max-width: 900px;
  margin: 0 auto;
  padding: 2.5rem 2rem;
  border-radius: 28px;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(18px);
}

.form-wrap h3 {
  margin: 0 0 0.8rem;
  font-size: clamp(1.8rem, 3.2vw, 2.3rem);
  font-weight: 700;
}

.form-wrap p {
  margin: 0 0 1.2rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.iframe-container {
  position: relative;
  width: 100%;
  max-width: 900px;
  margin: 0 auto;
  border-radius: 20px;
  padding: 1.25rem;
  overflow: hidden;
  box-shadow: 0 20px 42px rgba(0, 0, 0, 0.28);
  transition: box-shadow 0.3s ease;
}

.iframe-container:hover {
  box-shadow: 0 26px 56px rgba(0, 0, 0, 0.32);
}

.iframe-loader {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  background: rgba(0, 0, 0, 0.55);
  color: rgba(255, 255, 255, 0.92);
  font-weight: 600;
  font-size: 0.95rem;
  z-index: 3;
  transition: opacity 0.35s ease;
}

.iframe-loader--hidden {
  opacity: 0;
  pointer-events: none;
}

.spinner {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 4px solid rgba(255, 255, 255, 0.25);
  border-top-color: rgba(255, 255, 255, 0.9);
  animation: spinnerRotate 1.1s linear infinite;
}

@keyframes spinnerRotate {
  to {
    transform: rotate(360deg);
  }
}

.form-iframe {
  width: 100%;
  border: none;
  background: var(--iframe-bg);
  height: 740px;
  border-radius: 14px;
  box-sizing: border-box;
}

.contacts {
  max-width: 780px;
  margin: 0 auto;
  display: grid;
  gap: 1.6rem;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.contact-card {
  padding: 1.75rem 1.4rem;
  border-radius: 22px;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(14px);
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease);
}

.contact-card:hover {
  transform: translateY(-7px);
  box-shadow: 0 26px 54px rgba(0, 0, 0, 0.31);
}

.contact-card__title {
  margin: 0 0 0.85rem;
  font-size: 1.15rem;
  font-weight: 700;
}

.contact-card__text {
  margin: 0.25rem 0;
  color: var(--text-muted);
  line-height: 1.6;
}

.site-footer {
  padding: 3.5rem 1.5rem;
  text-align: center;
  color: var(--text-muted);
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}

.theme-light .site-footer {
  color: rgba(15, 23, 42, 0.66);
  border-top: 1px solid rgba(15, 23, 42, 0.12);
}

.theme-light .form-wrap {
  background: rgba(255, 255, 255, 0.95);
  border: 1px solid rgba(15, 23, 42, 0.12);
  box-shadow: 0 22px 52px rgba(0, 0, 0, 0.12);
}

.theme-light .iframe-container {
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid rgba(15, 23, 42, 0.14);
}

.theme-light .iframe-loader {
  background: rgba(255, 255, 255, 0.8);
  color: rgba(15, 23, 42, 0.9);
}

.theme-light .spinner {
  border: 4px solid rgba(15, 23, 42, 0.2);
  border-top-color: rgba(15, 23, 42, 0.8);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  align-items: center;
}

.footer-text {
  margin: 0;
  font-size: 0.95rem;
}

.footer-meta {
  margin: 0;
  font-size: 0.9rem;
  opacity: 0.85;
}

.footer-meta a {
  color: rgba(239, 127, 26, 0.9);
  font-weight: 600;
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.95s var(--ease), transform 0.95s var(--ease);
}

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

@media (max-width: 920px) {
  .hero__content {
    padding: 2.4rem 1.8rem;
  }

  .hero__title {
    font-size: clamp(2rem, 6vw, 3.2rem);
  }

  .hero__meta {
    gap: 1rem;
  }

  .form-iframe {
    height: 840px;
  }
}

@media (max-width: 740px) {
  .nav {
    display: none;
  }

  .nav--open {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
  }

  .burger {
    display: block;
  }

  .hero {
    padding-top: 6.2rem;
  }

  .section {
    padding: 5.5rem 1.5rem 4.8rem;
  }

  .contact-card {
    padding: 1.5rem 1.25rem;
  }
}

@media (max-width: 520px) {
  .hero__meta {
    grid-template-columns: 1fr;
  }

  .container {
    width: min(100% - 1.6rem, var(--max-width));
  }

  .section__title {
    font-size: clamp(1.9rem, 5vw, 2.4rem);
  }
}