* {
  box-sizing: border-box;
}

:root {
  --bg: #111;
  --bg-elevated: #1a1a1a;
  --bg-overlay: rgba(0, 0, 0, 0.72);
  --text: #f5f5f5;
  --muted: #c9c9c9;
  --border: #3b3b3b;
  --border-strong: #6a6a6a;
  --accent: #ffffff;
  --shadow: 0 20px 60px rgba(0, 0, 0, 0.45);
  --radius: 16px;
  --radius-sm: 10px;
  --content-width: 960px;
  --logo-width: 600px;
  --header-stage-height: clamp(110px, 30vw, 176px);
}

html {
  scroll-behavior: smooth;
}

html,
body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Arial, Helvetica, sans-serif;
}

body {
  min-height: 100vh;
  line-height: 1.5;
}

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

button,
input,
textarea {
  font: inherit;
}

a {
  color: inherit;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  white-space: nowrap;
  border: 0;
  clip: rect(0 0 0 0);
}

.site-header {
  padding: 24px;
}

.header-stage {
  position: relative;
  width: min(100%, var(--logo-width));
  height: var(--header-stage-height);
  margin: 0 auto;
  overflow: hidden;
}

.logo-trigger,
.menu-panel {
  position: absolute;
  inset: 0;
}

.logo-trigger {
  display: grid;
  place-items: center;
  width: 100%;
  height: 100%;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--accent);
  cursor: pointer;
  transition:
    transform 0.6s cubic-bezier(0.22, 1, 0.36, 1),
    opacity 0.34s ease;
  will-change: transform, opacity;
}

.logo-trigger:focus-visible {
  outline: 2px solid #fff;
  outline-offset: 8px;
  border-radius: 6px;
}

.logo {
  width: 100%;
  height: auto;
  max-height: 100%;
  fill: currentColor;
}

.menu-panel {
  display: grid;
  place-items: center;
  padding: 10px 8px;
  opacity: 0;
  transform: translateY(18px) scale(0.96);
  pointer-events: none;
  transition:
    opacity 0.22s ease 0.12s,
    transform 0.38s cubic-bezier(0.22, 1, 0.36, 1) 0.12s;
  will-change: transform, opacity;
}

.menu-panel[hidden] {
  display: grid;
}

.menu-list {
  display: grid;
  width: min(100%, 320px);
  gap: 8px;
  align-content: center;
}

.menu-link {
  display: block;
  width: 100%;
  min-height: 42px;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--bg-elevated);
  color: var(--text);
  text-align: center;
  text-decoration: none;
  cursor: pointer;
  box-shadow: var(--shadow);
  transition:
    border-color 0.15s ease,
    background 0.15s ease,
    transform 0.15s ease;
}

.menu-link:hover,
.menu-link:focus-visible {
  border-color: var(--border-strong);
  background: rgba(255, 255, 255, 0.04);
  outline: none;
  transform: translateY(-1px);
}

.header-stage.menu-open .logo-trigger {
  transform: translateY(-135%);
  opacity: 0;
  pointer-events: none;
}

.header-stage.menu-open .menu-panel {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}

.hero {
  min-height: calc(60vh - 100px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 24px;
}

.hero-inner {
  width: min(100%, var(--content-width));
  margin: 0 auto;
  text-align: center;
}

.hero h1 {
  margin: 0 0 12px;
  font-size: clamp(2rem, 8vw, 3.5rem);
  line-height: 1.05;
}

.hero p {
  max-width: 40rem;
  margin: 0 auto;
  color: var(--muted);
  font-size: 1rem;
}

.links {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 24px;
}

.links a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 14px 18px;
  border: 1px solid var(--border-strong);
  border-radius: 12px;
  text-decoration: none;
  transition: border-color 0.15s ease, background 0.15s ease, transform 0.15s ease;
}

.links a:hover,
.links a:focus-visible {
  border-color: #fff;
  background: rgba(255, 255, 255, 0.04);
  outline: none;
  transform: translateY(-1px);
}

.form-status {
  margin: 0 0 16px;
  padding: 12px 14px;
  border: 1px solid var(--border-strong);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
}

.form-status.is-error {
  border-color: #8a5a5a;
}

.form-status.is-success {
  border-color: #5a8a68;
}

.modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: grid;
  place-items: center;
  padding: 20px;
  background: var(--bg-overlay);
}

.modal[hidden] {
  display: none;
}

.modal-dialog {
  position: relative;
  width: min(100%, 720px);
  max-height: min(88vh, 900px);
  overflow: auto;
  padding: 24px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.modal-close {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 42px;
  height: 42px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: transparent;
  color: var(--text);
  cursor: pointer;
}

.modal-close:hover,
.modal-close:focus-visible {
  border-color: var(--border-strong);
  background: rgba(255, 255, 255, 0.04);
  outline: none;
}

.modal h2 {
  margin: 0 48px 16px 0;
  font-size: 1.75rem;
  line-height: 1.1;
}

.modal p {
  margin: 0 0 1rem;
  color: var(--muted);
}

.contact-form {
  display: grid;
  gap: 14px;
}

.form-row {
  display: grid;
  gap: 8px;
}

.form-row label {
  font-weight: 700;
  letter-spacing: 0.01em;
}

.form-row input,
.form-row textarea {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid var(--border-strong);
  border-radius: 12px;
  background: #101010;
  color: var(--text);
}

.form-row input:focus,
.form-row textarea:focus {
  outline: 2px solid #fff;
  outline-offset: 1px;
}

.form-row textarea {
  min-height: 150px;
  resize: vertical;
}

.form-note {
  font-size: 0.95rem;
  color: var(--muted);
}

.button-row {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 14px 18px;
  border: 1px solid var(--border-strong);
  border-radius: 12px;
  background: #fff;
  color: #111;
  font-weight: 700;
  cursor: pointer;
}

.button:hover,
.button:focus-visible {
  outline: none;
  transform: translateY(-1px);
}

.button.button-secondary {
  background: transparent;
  color: var(--text);
}

@media (min-width: 640px) {
  .site-header {
    padding: 24px 32px;
  }

  .hero {
    padding: 32px;
  }

  .links {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
  }

  .button-row {
    flex-direction: row;
    justify-content: flex-start;
  }

  .menu-list {
    grid-template-columns: 1fr 1fr;
    max-width: 420px;
  }

  .modal-dialog {
    padding: 32px;
  }
}