@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@400;500&display=swap');

:root {
  color-scheme: dark;
  --font: 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --header-height: 56px;
  --max-width: 640px;
  --transition: 0.2s ease;
  --color-bg: #2b2b2b;
  --color-surface: rgba(255, 255, 255, 0.06);
  --color-text: #f5f5f5;
  --color-text-muted: #a8a8a8;
  --color-border: #444444;
  --color-icon-filter: brightness(0) invert(1);
  --color-online: #3d9a50;
  --color-offline: #d64545;
}

[data-theme="light"] {
  color-scheme: light;
  --color-bg: #ffffff;
  --color-surface: rgba(255, 255, 255, 0.85);
  --color-text: #2b2b2b;
  --color-text-muted: #6e6e6e;
  --color-border: #d8d8d8;
  --color-icon-filter: none;
}

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

html {
  scrollbar-gutter: stable;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  transition: color var(--transition), background var(--transition);
  -webkit-font-smoothing: antialiased;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  overflow-x: clip;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition);
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding-left: max(20px, env(safe-area-inset-left, 0px));
  padding-right: max(20px, env(safe-area-inset-right, 0px));
}

.header {
  position: sticky;
  top: 0;
  z-index: 100;
  padding-top: env(safe-area-inset-top, 0px);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  flex-wrap: wrap;
  gap: 12px 20px;
  min-height: var(--header-height);
  padding-top: 10px;
  padding-bottom: 10px;
}

.nav__link {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.2;
  padding: 4px 0;
}

.nav__link.active {
  color: var(--color-text);
}

.nav__link--searx {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.nav__label--short {
  display: none;
}

.status-indicator {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-text-muted);
  flex-shrink: 0;
  transition: background var(--transition);
}

.status-indicator.is-online {
  background: var(--color-online);
}

.status-indicator.is-offline {
  background: var(--color-offline);
}

.theme-toggle {
  flex-shrink: 0;
  border: 1px solid var(--color-border);
  background: transparent;
  color: var(--color-text-muted);
  font: inherit;
  font-size: 0.875rem;
  line-height: 1;
  min-height: 32px;
  padding: 6px 10px;
  cursor: pointer;
  transition: color var(--transition), border-color var(--transition);
}

.main {
  flex: 1;
  padding-top: 48px;
  padding-bottom: max(48px, env(safe-area-inset-bottom, 0px));
}

.main:has(.page__back) {
  display: flex;
  flex-direction: column;
  min-height: calc(100dvh - var(--header-height) - env(safe-area-inset-top, 0px));
}

.main--home {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: 20px;
  min-height: calc(100dvh - var(--header-height) - env(safe-area-inset-top, 0px));
  padding-top: 32px;
  padding-bottom: max(32px, env(safe-area-inset-bottom, 0px));
}

.title {
  font-size: 1.5rem;
  font-weight: 500;
  letter-spacing: -0.02em;
}

.page__title {
  margin-bottom: 24px;
}

.main--home .title {
  font-size: 2rem;
}

.content p,
.project__desc,
.project__details-inner p,
.article__date {
  color: var(--color-text-muted);
}

.content p {
  margin-bottom: 1em;
  overflow-wrap: break-word;
}

.project__desc {
  display: block;
  font-size: 0.875rem;
  margin-top: 2px;
}

.project__details-inner p {
  font-size: 0.875rem;
  line-height: 1.7;
  padding-bottom: 14px;
}

.article__date {
  display: block;
  font-size: 0.875rem;
  margin: -16px 0 24px;
}

.intro__actions {
  display: inline-flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}

.intro__btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 10px 18px;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
  font-size: 0.875rem;
  font-weight: 500;
  white-space: nowrap;
  transition: background var(--transition), border-color var(--transition), color var(--transition);
}

.intro__btn-icon {
  flex-shrink: 0;
  filter: var(--color-icon-filter);
  transition: filter var(--transition);
}

.intro__btc {
  position: relative;
  display: inline-block;
  max-width: 100%;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  line-height: 1.4;
  text-align: left;
}

.intro__btc-label {
  font-weight: 500;
  color: var(--color-text);
}

.intro__btc-address {
  margin-left: 6px;
  padding: 0;
  border: none;
  background: none;
  font: inherit;
  color: inherit;
  text-align: left;
  word-break: break-all;
  cursor: pointer;
  transition: color var(--transition);
}

.intro__btc-copied {
  position: absolute;
  top: 100%;
  left: 50%;
  margin-top: 4px;
  font-weight: 500;
  color: var(--color-text);
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transform: translateX(-50%);
  transition: opacity var(--transition);
}

.intro__btc.is-copied .intro__btc-copied {
  opacity: 1;
}

.project-list {
  list-style: none;
  border-top: 1px solid var(--color-border);
}

.project {
  border-bottom: 1px solid var(--color-border);
}

.project__toggle {
  display: block;
  width: 100%;
  min-height: 44px;
  padding: 14px 0;
  border: none;
  background: none;
  font: inherit;
  text-align: left;
  color: var(--color-text);
  cursor: pointer;
}

.project__name {
  display: block;
  font-weight: 500;
  transition: color var(--transition);
}

.project__details {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.25s ease;
}

.project.open .project__details {
  grid-template-rows: 1fr;
}

.project__details-inner {
  overflow: hidden;
}

.project__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 16px;
  padding-bottom: 14px;
}

.link {
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.content h2 {
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-text);
  margin-top: 1.5em;
  margin-bottom: 0.5em;
}

.content ul {
  color: var(--color-text-muted);
  margin-bottom: 1em;
  padding-left: 1.25em;
}

.content li {
  margin-bottom: 0.35em;
}

.page__back {
  display: inline-block;
  margin-top: auto;
  padding-top: 64px;
  min-height: 44px;
  line-height: 44px;
}

@media (hover: hover) {
  a:hover {
    color: var(--color-text-muted);
  }

  .nav__link:hover {
    color: var(--color-text);
  }

  .theme-toggle:hover {
    color: var(--color-text);
    border-color: var(--color-text-muted);
  }

  .intro__btn:hover {
    background: var(--color-text);
    border-color: var(--color-text);
    color: var(--color-bg);
  }

  .intro__btc-address:hover {
    color: var(--color-text);
  }

  .intro__btn:hover .intro__btn-icon {
    filter: brightness(0) invert(1);
  }

  [data-theme="dark"] .intro__btn:hover .intro__btn-icon {
    filter: none;
  }

  .project__toggle:hover .project__name {
    color: var(--color-text-muted);
  }
}

@media (max-width: 640px) {
  body {
    font-size: 14px;
  }

  .container {
    padding-left: max(16px, env(safe-area-inset-left, 0px));
    padding-right: max(16px, env(safe-area-inset-right, 0px));
  }

  .nav {
    gap: 10px 14px;
    padding-top: 8px;
    padding-bottom: 8px;
  }

  .main {
    padding-top: 32px;
  }

  .main--home .title {
    font-size: 1.75rem;
  }

  .title {
    font-size: 1.375rem;
  }

  .nav__link {
    font-size: 0.8125rem;
    padding: 6px 0;
  }

  .theme-toggle {
    min-height: 36px;
    padding: 8px 10px;
  }

  .intro__btn {
    padding: 10px 16px;
    font-size: 0.8125rem;
  }

  .page__back {
    padding-top: 48px;
  }
}

@media (max-width: 480px) {
  .nav__label--long {
    display: none;
  }

  .nav__label--short {
    display: inline;
  }
}