:root {
  --bg: #2a2a28;
  --panel: #f7f6f2;
  --panel-dark: #1f201f;
  --text: #151515;
  --muted: #66645e;
  --line: #d8d6cf;
  --accent: #1d7771;
  --accent-dark: #13534f;
  --control-height: 56px;
}

* {
  box-sizing: border-box;
}

html {
  color-scheme: light;
  background: var(--bg);
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  color: var(--text);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  letter-spacing: 0;
}

button,
a,
input {
  font: inherit;
}

button,
.side-menu a,
.contact-menu a,
.error-actions a {
  min-height: 44px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #ffffff;
  color: var(--text);
  cursor: pointer;
  text-decoration: none;
}

button:hover,
.side-menu a:hover,
.contact-menu a:hover,
.error-actions a:hover {
  border-color: var(--accent);
}

button:focus-visible,
a:focus-visible,
input:focus-visible {
  outline: 3px solid rgba(29, 119, 113, 0.38);
  outline-offset: 2px;
}

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 30;
  transform: translateY(-150%);
  padding: 10px 14px;
  background: #fff;
  color: #000;
}

.skip-link:focus {
  transform: translateY(0);
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--control-height);
  padding: 6px max(12px, env(safe-area-inset-left)) 6px max(12px, env(safe-area-inset-right));
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(247, 246, 242, 0.96);
  backdrop-filter: blur(8px);
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 10px;
  min-width: 0;
}

.brand strong {
  font-size: 17px;
  font-weight: 700;
}

.brand span {
  color: var(--muted);
  font-size: 13px;
  white-space: nowrap;
}

.top-actions,
.error-actions {
  display: flex;
  align-items: center;
  gap: 6px;
}

.top-actions button,
.error-actions button,
.error-actions a {
  padding: 0 13px;
}

.viewer-shell {
  min-height: calc(100vh - var(--control-height) * 2);
  padding: 18px 12px 82px;
}

.pages {
  display: grid;
  gap: 18px;
  justify-items: center;
}

.pdf-page {
  display: grid;
  place-items: start center;
  width: 100%;
  min-height: 120px;
  scroll-margin-top: 72px;
}

.pdf-page canvas {
  display: block;
  max-width: 100%;
  height: auto;
  background: #fff;
}

.page-status {
  margin: 8px 0 0;
  color: #fff;
  font-size: 14px;
}

.status-panel {
  display: grid;
  justify-items: center;
  gap: 14px;
  max-width: 520px;
  margin: 56px auto;
  padding: 24px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 8px;
  background: rgba(31, 32, 31, 0.72);
  color: #fff;
  text-align: center;
}

.status-panel p {
  margin: 0;
}

progress {
  width: min(280px, 100%);
  accent-color: var(--accent);
}

.bottom-controls {
  position: fixed;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  min-height: var(--control-height);
  padding: 6px max(8px, env(safe-area-inset-right)) calc(6px + env(safe-area-inset-bottom)) max(8px, env(safe-area-inset-left));
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(247, 246, 242, 0.96);
  backdrop-filter: blur(8px);
}

.bottom-controls button {
  flex: 0 0 auto;
  padding: 0 10px;
}

.page-form {
  display: flex;
  align-items: center;
  gap: 4px;
  min-height: 44px;
  padding: 0 8px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
}

.page-form label {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
}

.page-form input {
  width: 46px;
  border: 0;
  text-align: center;
}

.page-form input::-webkit-outer-spin-button,
.page-form input::-webkit-inner-spin-button {
  margin: 0;
  appearance: none;
}

.page-form span {
  color: var(--muted);
  font-size: 14px;
  white-space: nowrap;
}

.side-menu,
.contact-menu {
  position: fixed;
  z-index: 25;
  display: grid;
  gap: 6px;
  width: min(280px, calc(100vw - 24px));
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

.side-menu {
  right: 12px;
  top: 64px;
}

.contact-menu {
  right: 12px;
  top: 64px;
}

.side-menu button,
.side-menu a,
.contact-menu a {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  padding: 0 12px;
}

.toast {
  position: fixed;
  right: 16px;
  bottom: 76px;
  z-index: 30;
  max-width: min(360px, calc(100vw - 32px));
  padding: 12px 14px;
  border-radius: 6px;
  background: var(--panel-dark);
  color: #fff;
  font-size: 14px;
}

[hidden] {
  display: none !important;
}

@media (max-width: 720px) {
  .brand span,
  .desktop-only {
    display: none;
  }

  .viewer-shell {
    padding: 12px 8px 82px;
  }

  .pages {
    gap: 14px;
  }

  .bottom-controls {
    justify-content: flex-start;
    overflow-x: auto;
  }

  .bottom-controls button {
    padding: 0 9px;
  }

  #zoomOutButton {
    display: none;
  }
}

@media (min-width: 721px) {
  #mobileDownloadButton,
  #mobileShareButton {
    display: none;
  }
}

@media (max-width: 360px) {
  .bottom-controls {
    gap: 4px;
  }

  .bottom-controls button {
    padding: 0 8px;
    font-size: 13px;
  }

  .page-form {
    padding: 0 6px;
  }
}

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

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}