:root {
  --color-bg: #1a1a1a;
  --color-panel: #191d16;
  --color-white: #fff;
  --color-text: #d6d6d6;
  --color-muted: #a8a8a8;
  --color-accent: #fac800;
  --color-link: #09f;
  --color-shadow: rgba(214, 214, 214, 0.65);
  --font-display: "Inter", system-ui, sans-serif;
  --font-body: "Inter Tight", system-ui, sans-serif;
  --max-width: 1200px;
  --header-height: 70px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 16px;
  line-height: 1.4;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--color-link);
  text-decoration: underline;
}

a:hover {
  text-decoration-thickness: 2px;
}

h1,
h2,
h3,
h4,
h5,
h6,
p {
  margin: 0;
}

main {
  padding-top: var(--header-height);
}

.page {
  margin: 0 auto;
  max-width: var(--max-width);
}

/* Header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: var(--color-bg);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 10px 20px;
  min-height: var(--header-height);
}

.nav__brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--color-white);
}

.nav__logo {
  width: 50px;
  height: 50px;
  border-radius: 4px;
  object-fit: cover;
}

.nav__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(28px, 5vw, 48px);
  letter-spacing: -0.08em;
  line-height: 1;
}

.nav__actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.nav__linkedin {
  display: flex;
  line-height: 0;
}

.nav__linkedin img {
  width: 32px;
  height: 32px;
  object-fit: cover;
}

.nav__burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 10px;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 0;
  background: transparent;
  cursor: pointer;
}

.nav__burger span {
  display: block;
  width: 40px;
  height: 4px;
  border-radius: 10px;
  background: var(--color-white);
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.nav__burger[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(14px) rotate(45deg);
}

.nav__burger[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav__burger[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-14px) rotate(-45deg);
}

/* Mobile menu */
.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 200;
}

.mobile-menu__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
}

.mobile-menu__panel {
  position: absolute;
  top: 0;
  right: 0;
  width: min(320px, 85vw);
  height: 100%;
  padding: 80px 32px 32px;
  background: var(--color-panel);
  border-left: 1px solid var(--color-bg);
}

.mobile-menu__close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 44px;
  height: 44px;
  border: 0;
  background: transparent;
  color: var(--color-white);
  font-size: 32px;
  line-height: 1;
  cursor: pointer;
}

.mobile-menu__links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.mobile-menu__links a {
  color: var(--color-white);
  font-size: 24px;
  text-decoration: none;
}

.mobile-menu__links a:hover {
  color: var(--color-accent);
}

/* Scroll reveal */
[data-animate] {
  opacity: 0;
  transform: perspective(1200px) scale(0.8);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

[data-animate].is-visible,
.no-js [data-animate] {
  opacity: 1;
  transform: perspective(1200px) scale(1);
}

.card[data-animate] {
  transition-delay: 0.1s;
}

.card[data-animate]:nth-child(2) {
  transition-delay: 0.2s;
}

.card[data-animate]:nth-child(3) {
  transition-delay: 0.3s;
}

/* Hero */
.hero-wrap {
  background: var(--color-panel);
  padding: 150px 50px 50px;
  border-bottom: 1px solid var(--color-bg);
  scroll-margin-top: var(--header-height);
}

.hero {
  background: var(--color-white);
  padding: 40px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.hero__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(48px, 7vw, 78px);
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: var(--color-bg);
}

.hero__tagline {
  font-size: clamp(20px, 3vw, 28px);
  color: var(--color-bg);
}

/* Section titles */
.section-title {
  font-family: var(--font-body);
  font-weight: 500;
  font-size: clamp(48px, 8vw, 87px);
  line-height: 1.05;
  color: var(--color-bg);
}

.section-title--light {
  color: var(--color-white);
}

/* Service */
.service {
  background: var(--color-panel);
  padding: 0 48px 48px;
  scroll-margin-top: 120px;
}

.service__layout {
  display: flex;
  gap: 48px;
  align-items: flex-start;
}

.service__sidebar {
  flex: 1 1 330px;
  min-width: 280px;
  position: sticky;
  top: calc(var(--header-height) + 50px);
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.service__intro {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.service__intro p {
  font-size: 32px;
  line-height: 1.4;
  color: var(--color-text);
}

.service__cards {
  flex: 2 1 0;
  display: flex;
  flex-direction: column;
  gap: 30px;
  min-width: 0;
}

.card {
  border: 2px solid var(--color-white);
  background: var(--color-panel);
  overflow: hidden;
}

.card__header {
  background: var(--color-white);
  padding: 20px 24px;
}

.card__header h3 {
  font-size: 25px;
  font-weight: 500;
  color: var(--color-bg);
}

.card__body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.card__body h4 {
  font-size: 24px;
  font-weight: 500;
  color: var(--color-white);
}

.card__body p {
  font-size: 20px;
  line-height: 1.4;
  color: var(--color-text);
}

/* Principles */
.principles {
  background: var(--color-panel);
  padding: 48px;
  scroll-margin-top: 200px;
}

.principles__inner {
  display: flex;
  flex-direction: column;
  gap: 48px;
}

.principles__list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.principle {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 24px;
  align-items: start;
  padding: 28px 0;
  border-top: 2px solid var(--color-text);
}

.principle:last-child {
  border-bottom: 2px solid var(--color-text);
}

.principle__number,
.principle__content h3 {
  font-size: clamp(24px, 4vw, 38px);
  font-weight: 500;
  color: var(--color-white);
}

.principle__content p {
  margin-top: 8px;
  font-size: 32px;
  line-height: 1.4;
  color: var(--color-text);
}

/* About */
.about {
  background: var(--color-panel);
  padding: 0 40px 40px;
  scroll-margin-top: 120px;
}

.about__inner {
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.about__layout {
  display: flex;
  gap: 48px;
  align-items: flex-start;
}

.about__photo {
  flex: 0 0 min(423px, 40%);
  margin: 0;
}

.about__photo img {
  width: 100%;
  border-radius: 4px;
  object-fit: cover;
}

.about__text {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.about__text p {
  font-size: 32px;
  line-height: 1.4;
  color: var(--color-text);
}

.contact-btn {
  display: inline-flex;
  align-self: flex-start;
  margin-top: 8px;
  padding: 14px 20px;
  border: 1px solid var(--color-bg);
  border-radius: 4px;
  background: var(--color-white);
  color: var(--color-bg);
  font-size: 18px;
  font-weight: 500;
  text-decoration: none;
  box-shadow: 3px 3px var(--color-shadow);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.contact-btn:hover {
  transform: translate(-1px, -1px);
  box-shadow: 4px 4px var(--color-shadow);
  text-decoration: none;
}

/* Impressum */
.impressum {
  padding: clamp(80px, 30vw, 550px) 20px 80px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 30px;
}

.impressum__title {
  font-size: 18px;
  font-weight: 500;
  color: var(--color-muted);
}

.impressum__text {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.impressum__text p {
  font-size: 18px;
  line-height: 1.4;
  color: var(--color-muted);
}

.impressum__text a {
  color: var(--color-muted);
}

.impressum__privacy {
  margin-top: 16px;
  max-width: 560px;
}

/* Tablet */
@media (max-width: 1199.98px) {
  .hero-wrap {
    padding: 60px 30px 30px;
  }

  .service {
    padding: 0 30px 30px;
  }

  .service__layout {
    flex-direction: column;
    gap: 30px;
  }

  .service__sidebar {
    position: static;
    width: 100%;
    min-width: 0;
  }

  .principles {
    padding: 30px;
  }

  .about__layout {
    flex-direction: column;
  }

  .about__photo {
    flex: none;
    width: 100%;
    max-width: 500px;
  }
}

/* Mobile */
@media (max-width: 809.98px) {
  .nav__burger {
    display: flex;
  }

  .hero-wrap {
    padding: 80px 10px 10px;
  }

  .hero {
    padding: 20px;
  }

  .service {
    padding: 0 20px 20px;
  }

  .service__intro p,
  .about__text p,
  .principle__content p {
    font-size: 24px;
  }

  .principles {
    padding: 20px;
  }

  .principle {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .about {
    padding: 0 20px 20px;
  }

  .impressum {
    padding-top: 80px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  [data-animate] {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .nav__burger span,
  .contact-btn {
    transition: none;
  }
}