body {
  color: #202124;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.5;
  margin: 0;
  min-height: 100vh;
}

.topbar {
  align-items: center;
  border-bottom: 1px solid #e1e6e9;
  display: flex;
  justify-content: space-between;
  padding: 12px 20px;
}

.topbar a {
  color: #202124;
  font-weight: 700;
  text-decoration: none;
}

.language-toggle {
  background: #fff;
  border: 1px solid #cbd5da;
  color: #123035;
  padding: 7px 10px;
}

.topbar-actions {
  display: flex;
  gap: 8px;
}

.theme-toggle {
  background: #fff;
  border: 1px solid #cbd5da;
  color: #123035;
  padding: 7px 10px;
}

main {
  margin: 0 auto;
  max-width: 840px;
  padding: 40px 20px;
}

.button,
.secondary-button,
button {
  background: #075985;
  border: 0;
  border-radius: 6px;
  color: #fff;
  cursor: pointer;
  display: inline-block;
  font: inherit;
  padding: 10px 14px;
  text-decoration: none;
}

button:disabled {
  cursor: wait;
  opacity: 0.7;
}

.secondary-button {
  background: #eef4f7;
  color: #075985;
  padding: 7px 10px;
}

label {
  display: block;
  margin: 12px 0;
}

input[type="datetime-local"] {
  display: block;
  font: inherit;
  margin-top: 6px;
  padding: 8px;
  width: min(100%, 280px);
}

.date-grid {
  display: grid;
  gap: 12px 20px;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.room-list {
  border-top: 1px solid #ddd;
  margin: 0 0 24px;
}

.room {
  border-bottom: 1px solid #ddd;
  display: flex;
  align-items: center;
  gap: 10px;
  justify-content: space-between;
  margin: 0;
  padding: 12px 0;
}

.room label {
  display: flex;
  gap: 10px;
  margin: 0;
  min-width: 0;
}

.room span {
  display: grid;
  gap: 2px;
  overflow-wrap: anywhere;
}

.room small {
  color: #777;
  font-size: 13px;
}

.tabs {
  margin: 24px 0;
}

.tabs > input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.tab-list {
  border-bottom: 1px solid #ccc;
  display: flex;
  gap: 4px;
  margin-bottom: 16px;
}

.tab-list label {
  border-bottom: 3px solid transparent;
  color: #555;
  cursor: pointer;
  margin: 0;
  padding: 10px 14px;
}

.tab-list span {
  color: #777;
  font-size: 0.9em;
  margin-left: 4px;
}

.tab-panel {
  display: none;
}

#tab-spaces:checked ~ .tab-list label[for="tab-spaces"],
#tab-direct:checked ~ .tab-list label[for="tab-direct"] {
  border-bottom-color: #075985;
  color: #202124;
}

#tab-spaces:checked ~ .spaces-panel,
#tab-direct:checked ~ .direct-panel {
  display: block;
}

.empty {
  color: #666;
  margin: 16px 0 24px;
}

.status-strip {
  align-items: center;
  background: #f6f8f9;
  border: 1px solid #d8e0e4;
  border-radius: 8px;
  display: flex;
  gap: 12px;
  justify-content: space-between;
  margin: 20px 0;
  padding: 12px 14px;
}

.status-strip[aria-busy="true"] {
  border-color: #8fc7dd;
  box-shadow: 0 0 0 3px rgba(7, 89, 133, 0.08);
}

.status-strip div {
  display: grid;
  gap: 2px;
}

.status-strip span {
  color: #666;
}

.refresh-card {
  background: #f9fbfc;
  border: 1px solid #d8e0e4;
  border-radius: 8px;
  margin: -8px 0 20px;
  padding: 14px;
}

.refresh-card-header {
  align-items: center;
  display: flex;
  gap: 10px;
  margin-bottom: 10px;
}

.refresh-card p {
  color: #666;
  margin: 10px 0 0;
}

.activity-dots {
  display: inline-flex;
  gap: 5px;
}

.activity-dots span {
  animation: dotPulse 1.1s ease-in-out infinite;
  background: #075985;
  border-radius: 50%;
  height: 8px;
  width: 8px;
}

.activity-dots span:nth-child(2) {
  animation-delay: 0.15s;
}

.activity-dots span:nth-child(3) {
  animation-delay: 0.3s;
}

.indeterminate-track {
  background: #e7eef2;
  border-radius: 999px;
  height: 9px;
  overflow: hidden;
  position: relative;
}

.indeterminate-track span {
  animation: indeterminate 1.25s ease-in-out infinite;
  background: linear-gradient(90deg, #075985, #1aa6b7);
  border-radius: inherit;
  display: block;
  height: 100%;
  position: absolute;
  width: 38%;
}

.skeleton-list {
  display: grid;
  gap: 10px;
  margin: 16px 0 24px;
}

.skeleton-list div {
  animation: pulse 1.2s ease-in-out infinite;
  background: linear-gradient(90deg, #edf2f4 0%, #f7f9fa 50%, #edf2f4 100%);
  border-radius: 6px;
  height: 48px;
}

.message-skeleton div {
  height: 92px;
}

@keyframes pulse {
  0% {
    opacity: 0.55;
  }
  50% {
    opacity: 1;
  }
  100% {
    opacity: 0.55;
  }
}

@keyframes dotPulse {
  0%,
  100% {
    opacity: 0.35;
    transform: translateY(0);
  }
  50% {
    opacity: 1;
    transform: translateY(-2px);
  }
}

@keyframes indeterminate {
  0% {
    left: -40%;
  }
  100% {
    left: 105%;
  }
}

.archive-actions {
  align-items: flex-start;
  display: flex;
  flex-wrap: wrap;
  gap: 12px 16px;
  margin-top: 20px;
}

.archive-actions p {
  color: #666;
  margin: 7px 0 0;
}

.download-progress {
  border-top: 1px solid #ddd;
  margin-top: 24px;
  padding-top: 16px;
}

.progress-header {
  display: grid;
  gap: 4px;
  margin-bottom: 10px;
}

.progress-header span {
  color: #666;
}

progress {
  height: 14px;
  width: 100%;
}

.message-toolbar {
  align-items: center;
  border-bottom: 1px solid #ddd;
  display: flex;
  justify-content: space-between;
  margin-bottom: 8px;
  padding-bottom: 12px;
}

.messages {
  margin-bottom: 24px;
}

.message {
  border-bottom: 1px solid #ddd;
  padding: 16px 0;
}

.message header {
  color: #555;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 12px;
  margin-bottom: 8px;
}

.message pre {
  font-family: inherit;
  margin: 0;
  overflow-wrap: anywhere;
  white-space: pre-wrap;
}

.attachments {
  display: grid;
  gap: 10px;
  margin: 12px 0 0;
}

.attachments a {
  overflow-wrap: anywhere;
}

.attachment-card {
  border: 1px solid #d8e0e4;
  border-radius: 8px;
  margin: 0;
  max-width: 560px;
  overflow: hidden;
}

.attachment-card img {
  background: #f6f8f9;
  display: block;
  height: auto;
  max-height: 460px;
  object-fit: contain;
  width: 100%;
}

.attachment-card figcaption {
  align-items: center;
  background: #f9fbfc;
  display: flex;
  gap: 10px;
  justify-content: space-between;
  padding: 8px 10px;
}

.attachment-card figcaption span {
  color: #777;
  display: none;
  font-size: 13px;
}

.attachment-card.preview-failed figcaption span {
  display: inline;
}

.attachment-link {
  background: #f6f8f9;
  border: 1px solid #d8e0e4;
  border-radius: 6px;
  display: block;
  padding: 10px;
}

:root {
  --bg: #f3f6f6;
  --surface: #ffffff;
  --surface-soft: #f8faf9;
  --line: #d9e2df;
  --text: #172026;
  --muted: #5f6f72;
  --accent: #0f766e;
  --accent-strong: #0b5f59;
  --accent-soft: #e2f4f0;
  --warn-soft: #fff7df;
  --shadow: 0 12px 28px rgba(25, 45, 48, 0.08);
}

:root[data-theme="dark"] {
  --bg: #101719;
  --surface: #162123;
  --surface-soft: #1c292b;
  --line: #2a3b3d;
  --text: #edf6f5;
  --muted: #9db0b2;
  --accent: #35b7a5;
  --accent-strong: #7ee0d1;
  --accent-soft: #183934;
  --warn-soft: #2b2617;
  --shadow: 0 14px 30px rgba(0, 0, 0, 0.28);
}

body {
  background: var(--bg);
  color: var(--text);
}

:root[data-theme="dark"] body {
  background: var(--bg);
}

a {
  color: var(--accent-strong);
}

.topbar {
  backdrop-filter: blur(14px);
  background: rgba(255, 255, 255, 0.86);
  border-bottom-color: rgba(15, 118, 110, 0.18);
  position: sticky;
  top: 0;
  z-index: 10;
}

:root[data-theme="dark"] .topbar {
  background: rgba(16, 23, 25, 0.86);
  border-bottom-color: rgba(126, 224, 209, 0.18);
}

.topbar a {
  color: var(--text);
}

.language-toggle {
  background: var(--surface);
  border-color: var(--line);
  color: var(--text);
  font-weight: 650;
}

.theme-toggle {
  background: var(--surface);
  border-color: var(--line);
  color: var(--text);
  font-weight: 650;
}

main {
  max-width: 980px;
  padding-top: 32px;
}

body:has(.landing-hero) {
  background:
    linear-gradient(135deg, rgba(15, 118, 110, 0.12), transparent 32rem),
    radial-gradient(circle at 78% 18%, rgba(185, 139, 34, 0.12), transparent 18rem),
    var(--bg);
}

:root[data-theme="dark"] body:has(.landing-hero) {
  background:
    linear-gradient(135deg, rgba(53, 183, 165, 0.14), transparent 34rem),
    radial-gradient(circle at 78% 18%, rgba(185, 139, 34, 0.16), transparent 18rem),
    var(--bg);
}

body:has(.landing-hero) main {
  max-width: 1120px;
  padding-top: 52px;
}

.landing-hero {
  align-items: center;
  display: grid;
  gap: 32px;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 380px);
  min-height: 440px;
}

.landing-copy {
  max-width: 760px;
}

.eyebrow {
  color: var(--accent-strong);
  font-size: 14px;
  font-weight: 750;
  letter-spacing: 0;
  margin: 0 0 16px;
  text-transform: uppercase;
}

.landing-copy h1 {
  font-size: clamp(44px, 7vw, 76px);
  letter-spacing: 0;
  margin-bottom: 20px;
  max-width: 780px;
}

.landing-copy > p:not(.eyebrow) {
  color: var(--muted);
  font-size: 20px;
  margin: 0 0 30px;
  max-width: 760px;
}

.hero-button {
  font-size: 18px;
  font-weight: 750;
  padding: 14px 20px;
}

.signal-panel {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.78), rgba(255, 255, 255, 0.36)),
    var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(3, 1fr);
  padding: 18px;
}

:root[data-theme="dark"] .signal-panel {
  background:
    linear-gradient(180deg, rgba(28, 41, 43, 0.92), rgba(22, 33, 35, 0.72)),
    var(--surface);
}

.signal-panel span,
.signal-panel strong {
  border-radius: 6px;
  min-height: 58px;
}

.signal-panel span {
  background: linear-gradient(135deg, var(--accent-soft), rgba(185, 139, 34, 0.24));
}

.signal-panel strong {
  align-items: center;
  background: var(--surface-soft);
  border: 1px solid var(--line);
  color: var(--accent-strong);
  display: flex;
  font-size: 15px;
  justify-content: center;
}

.site-footer {
  border-top: 1px solid var(--line);
  color: var(--muted);
  display: grid;
  gap: 4px;
  margin: 32px auto 0;
  max-width: 1180px;
  padding: 18px 20px 28px;
}

.site-footer p {
  margin: 0;
}

h1 {
  font-size: 34px;
  line-height: 1.15;
  margin: 0 0 18px;
}

.button,
button {
  background: var(--accent);
  box-shadow: 0 2px 0 rgba(0, 0, 0, 0.08);
}

.button:hover,
button:hover {
  background: var(--accent-strong);
}

.secondary-button {
  background: var(--accent-soft);
  color: var(--accent-strong);
  box-shadow: none;
}

.secondary-button:hover {
  background: #d3eee8;
}

:root[data-theme="dark"] .secondary-button:hover {
  background: #214840;
}

input[type="datetime-local"] {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--text);
}

input[type="checkbox"] {
  accent-color: var(--accent);
}

.date-grid {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
  padding: 14px 16px;
}

.status-strip,
.refresh-card,
.download-progress {
  background: var(--surface);
  border-color: var(--line);
  box-shadow: var(--shadow);
}

.status-strip[aria-busy="true"] {
  border-color: rgba(15, 118, 110, 0.45);
  box-shadow: 0 0 0 3px rgba(15, 118, 110, 0.1), var(--shadow);
}

.status-strip span,
.refresh-card p,
.archive-actions p,
.progress-header span,
.room small,
.message header,
.empty {
  color: var(--muted);
}

.activity-dots span {
  background: var(--accent);
}

.indeterminate-track {
  background: #dfe9e7;
}

.indeterminate-track span {
  background: linear-gradient(90deg, var(--accent), #2f9f87, #b98b22);
}

.tabs {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
  padding: 14px;
}

.tab-list {
  border-bottom-color: var(--line);
  margin-bottom: 8px;
}

.tab-list label {
  color: var(--muted);
}

#tab-spaces:checked ~ .tab-list label[for="tab-spaces"],
#tab-direct:checked ~ .tab-list label[for="tab-direct"] {
  border-bottom-color: var(--accent);
  color: var(--text);
}

.room-list {
  border-top: 0;
  display: grid;
  gap: 8px;
  margin: 12px 0 18px;
}

.room {
  background: var(--surface-soft);
  border: 1px solid transparent;
  border-radius: 8px;
  padding: 10px 12px;
  transition: border-color 120ms ease, background 120ms ease, transform 120ms ease;
}

.room:hover {
  background: #ffffff;
  border-color: rgba(15, 118, 110, 0.28);
  transform: translateY(-1px);
}

:root[data-theme="dark"] .room:hover {
  background: #213032;
  border-color: rgba(126, 224, 209, 0.24);
}

.room span strong {
  font-weight: 650;
}

.skeleton-list div {
  background: linear-gradient(90deg, #e7eeee 0%, #f7faf9 50%, #e7eeee 100%);
}

.archive-actions {
  background: var(--warn-soft);
  border: 1px solid #ead9a4;
  border-radius: 8px;
  padding: 12px;
}

:root[data-theme="dark"] .archive-actions {
  border-color: #51451d;
}

progress {
  accent-color: var(--accent);
}

.message-toolbar {
  border-bottom-color: var(--line);
}

.message {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
  margin: 12px 0;
  padding: 14px 16px;
}

.message pre a {
  background: var(--accent-soft);
  border-radius: 4px;
  color: var(--accent-strong);
  padding: 0 3px;
  text-decoration: none;
}

.message pre a:hover {
  text-decoration: underline;
}

.attachment-card,
.attachment-link {
  background: var(--surface);
  border-color: var(--line);
}

.attachment-card img {
  background: #edf3f2;
}

:root[data-theme="dark"] .attachment-card img {
  background: #101719;
}

.attachment-card figcaption {
  background: var(--surface-soft);
}

@media (max-width: 640px) {
  .topbar {
    gap: 10px;
  }

  main {
    padding: 24px 14px;
  }

  h1 {
    font-size: 28px;
  }

  .status-strip {
    align-items: flex-start;
    display: grid;
  }

  .room {
    align-items: stretch;
    display: grid;
  }

  .landing-hero {
    gap: 24px;
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .landing-copy h1 {
    font-size: 40px;
  }

  .landing-copy > p:not(.eyebrow) {
    font-size: 17px;
  }

  .signal-panel {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .signal-panel span,
  .signal-panel strong {
    min-height: 44px;
  }
}

body:has(.rooms-shell) main {
  max-width: 1180px;
}

.page-heading {
  align-items: flex-start;
  display: flex;
  gap: 16px;
  justify-content: space-between;
  margin-bottom: 18px;
}

.page-heading p,
.workspace-header p {
  color: var(--muted);
  margin: 0;
}

.page-heading h1,
.workspace-header h2 {
  margin-bottom: 6px;
}

.rooms-shell {
  align-items: start;
  display: grid;
  gap: 18px;
  grid-template-columns: minmax(260px, 320px) minmax(0, 1fr);
}

.control-panel,
.workspace-panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.control-panel {
  display: grid;
  position: sticky;
  top: 70px;
}

.workspace-panel {
  min-width: 0;
  padding: 16px;
}

.workspace-header {
  align-items: flex-start;
  border-bottom: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  margin-bottom: 12px;
  padding-bottom: 14px;
}

.panel-section {
  border-bottom: 1px solid var(--line);
  padding: 16px;
}

.panel-section:last-child {
  border-bottom: 0;
}

.panel-section h2,
.workspace-header h2 {
  font-size: 15px;
  letter-spacing: 0;
  margin: 0 0 10px;
}

.selected-counter {
  align-items: baseline;
  background: var(--surface-soft);
  border: 1px solid var(--line);
  border-radius: 8px;
  display: flex;
  gap: 8px;
  padding: 12px;
}

.selected-counter strong {
  color: var(--accent-strong);
  font-size: 30px;
  line-height: 1;
}

.selected-counter span {
  color: var(--muted);
}

.control-panel .date-grid {
  background: transparent;
  border: 0;
  box-shadow: none;
  padding: 0;
}

.control-panel .status-strip,
.control-panel .refresh-card,
.control-panel .download-progress {
  box-shadow: none;
}

.control-panel .status-strip {
  align-items: stretch;
  display: grid;
  margin: 0;
}

.control-panel .refresh-card {
  margin: 10px 0 0;
}

.control-panel .archive-actions {
  margin: 0;
}

.workspace-panel .tabs {
  background: transparent;
  border: 0;
  box-shadow: none;
  margin: 0;
  padding: 0;
}

.workspace-panel .room-list {
  margin-bottom: 0;
}

@media (max-width: 860px) {
  body:has(.rooms-shell) main {
    max-width: 720px;
  }

  .rooms-shell {
    grid-template-columns: 1fr;
  }

  .control-panel {
    position: static;
  }

  .page-heading {
    display: grid;
  }
}