:root,
[data-theme='light'] {
  color-scheme: light;
  --veslo-dark-surface: #001932;
  --veslo-dark-sidebar: #0a2440;
  --veslo-accent-dark: #1dd7ee;
  --veslo-radius-control: 4px;
  --veslo-radius-surface: 6px;
  --veslo-content-width: 960px;
  --veslo-ink: #0a0e14;
  --veslo-blue: #001932;
  --veslo-accent: #00a8c8;
  --veslo-accent-hover: #008eaa;
  --veslo-accent-strong: #006f86;
  --veslo-accent-ring: rgba(0, 168, 200, 0.18);
  --veslo-canvas: #fcfcfc;
  --veslo-surface: #ffffff;
  --veslo-sidebar: #f6f8fb;
  --veslo-surface-solid: #ffffff;
  --veslo-line: rgba(10, 14, 20, 0.08);
  --veslo-line-soft: rgba(10, 14, 20, 0.06);
  --veslo-muted: rgba(10, 14, 20, 0.68);
  --veslo-hover: #f6f8fb;
  --veslo-active: #eef1f5;
  --veslo-composer-shadow: 0 8px 30px rgba(17, 24, 39, 0.06);
  --bg: #ffffff;
  --panel: #ffffff;
  --border: rgba(10, 14, 20, 0.08);
  --text: #0a0e14;
  --muted: rgba(10, 14, 20, 0.68);
  --accent: #00a8c8;
  --nav-active-bg: rgba(0, 168, 200, 0.1);
  --nav-hover-bg: #f6f8fb;
  --inbound: #ffffff;
  --outbound: rgba(0, 168, 200, 0.1);
  --msg-hover: rgba(0, 168, 200, 0.06);
  --sender-you: #006f86;
  --code-bg: #f6f8fb;
  --code-border: rgba(10, 14, 20, 0.08);
  --inline-code-fg: #006f86;
  --mention-user-fg: #006f86;
  --mention-user-bg: rgba(0, 168, 200, 0.12);
  --mention-here-fg: #001932;
  --mention-here-bg: rgba(0, 168, 200, 0.1);
  --link: #006f86;
  --danger: #c73945;
}

[data-theme='dark'] {
  color-scheme: dark;
  --veslo-ink: rgba(255, 255, 255, 0.92);
  --veslo-blue: #1dd7ee;
  --veslo-accent: var(--veslo-accent-dark);
  --veslo-accent-hover: #54e3f2;
  --veslo-accent-strong: #1dd7ee;
  --veslo-accent-ring: rgba(29, 215, 238, 0.22);
  --veslo-canvas: #001932;
  --veslo-surface: #001932;
  --veslo-sidebar: #0a2440;
  --veslo-surface-solid: #001932;
  --veslo-line: rgba(255, 255, 255, 0.1);
  --veslo-line-soft: rgba(255, 255, 255, 0.08);
  --veslo-muted: rgba(255, 255, 255, 0.64);
  --veslo-hover: #12304f;
  --veslo-active: #183753;
  --veslo-composer-shadow: 0 8px 30px rgba(0, 0, 0, 0.18);
  --bg: #001932;
  --panel: #001932;
  --border: rgba(255, 255, 255, 0.1);
  --text: rgba(255, 255, 255, 0.92);
  --muted: rgba(255, 255, 255, 0.64);
  --accent: #1dd7ee;
  --nav-active-bg: rgba(29, 215, 238, 0.12);
  --nav-hover-bg: #12304f;
  --inbound: #001932;
  --outbound: rgba(29, 215, 238, 0.12);
  --msg-hover: rgba(29, 215, 238, 0.08);
  --sender-you: #1dd7ee;
  --code-bg: #0a2440;
  --code-border: rgba(255, 255, 255, 0.1);
  --inline-code-fg: #1dd7ee;
  --mention-user-fg: #1dd7ee;
  --mention-user-bg: rgba(29, 215, 238, 0.16);
  --mention-here-fg: rgba(255, 255, 255, 0.92);
  --mention-here-bg: rgba(29, 215, 238, 0.12);
  --link: #1dd7ee;
  --danger: #ff7b86;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme='dark']):not([data-theme='light']) {
    color-scheme: dark;
    --veslo-ink: rgba(255, 255, 255, 0.92);
    --veslo-blue: #1dd7ee;
    --veslo-accent: var(--veslo-accent-dark);
    --veslo-accent-hover: #54e3f2;
    --veslo-accent-strong: #1dd7ee;
    --veslo-accent-ring: rgba(29, 215, 238, 0.22);
    --veslo-canvas: #001932;
    --veslo-surface: #001932;
    --veslo-sidebar: #0a2440;
    --veslo-surface-solid: #001932;
    --veslo-line: rgba(255, 255, 255, 0.1);
    --veslo-line-soft: rgba(255, 255, 255, 0.08);
    --veslo-muted: rgba(255, 255, 255, 0.64);
    --veslo-hover: #12304f;
    --veslo-active: #183753;
    --veslo-composer-shadow: 0 8px 30px rgba(0, 0, 0, 0.18);
    --bg: #001932;
    --panel: #001932;
    --border: rgba(255, 255, 255, 0.1);
    --text: rgba(255, 255, 255, 0.92);
    --muted: rgba(255, 255, 255, 0.64);
    --accent: #1dd7ee;
    --nav-active-bg: rgba(29, 215, 238, 0.12);
    --nav-hover-bg: #12304f;
    --inbound: #001932;
    --outbound: rgba(29, 215, 238, 0.12);
    --msg-hover: rgba(29, 215, 238, 0.08);
    --sender-you: #1dd7ee;
    --code-bg: #0a2440;
    --code-border: rgba(255, 255, 255, 0.1);
    --inline-code-fg: #1dd7ee;
    --mention-user-fg: #1dd7ee;
    --mention-user-bg: rgba(29, 215, 238, 0.16);
    --mention-here-fg: rgba(255, 255, 255, 0.92);
    --mention-here-bg: rgba(29, 215, 238, 0.12);
    --link: #1dd7ee;
    --danger: #ff7b86;
  }
}

html,
body,
button,
input,
textarea {
  font-family:
    'DM Sans',
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    'Segoe UI',
    sans-serif;
}

body {
  background: var(--veslo-surface);
  color: var(--veslo-ink);
  font-weight: 400;
  letter-spacing: -0.01em;
}

::selection {
  color: var(--veslo-ink);
  background: rgba(0, 168, 200, 0.22);
}

* {
  scrollbar-color: color-mix(in srgb, var(--veslo-ink) 20%, transparent) transparent;
  scrollbar-width: thin;
}

.layout,
.main,
.main-body,
.chat-column,
.messages {
  background: var(--veslo-surface);
}

.sidebar {
  background: var(--veslo-sidebar);
  border-right-color: var(--veslo-line);
  box-shadow: none;
}

.sidebar-header,
.header {
  border-bottom-color: var(--veslo-line);
}

.sidebar-header {
  padding: 0 12px 0 14px;
  background: var(--veslo-sidebar);
}

.sidebar-header h1.veslo-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  overflow: visible;
  color: var(--veslo-ink);
  font-size: 17px;
  font-weight: 500;
  letter-spacing: -0.02em;
}

.auth-screen h1.veslo-brand {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  color: var(--veslo-ink);
  font-weight: 500;
  letter-spacing: -0.03em;
}

.veslo-brand-mark {
  display: block;
  width: 28px;
  height: 28px;
  flex: 0 0 28px;
  border-radius: 5px;
  box-shadow: none;
}

.sidebar-hide-btn,
.sidebar-show-btn,
.composer-attach,
.composer-send {
  border-radius: var(--veslo-radius-control);
}

.sidebar-show-btn {
  background: var(--veslo-surface);
  border-color: var(--veslo-line);
}

.sidebar-nav {
  padding: 10px 0;
}

.nav-section {
  margin-bottom: 12px;
}

.nav-section-label,
.composer-preview-kind,
.attachment-chip-kind {
  color: color-mix(in srgb, var(--veslo-ink) 46%, transparent);
  font-family: 'DM Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.12em;
  line-height: 1.4;
}

.nav-section-label {
  padding: 10px 16px 6px;
}

.nav-item,
.nav-room-caret,
.nav-room-add,
.nav-thread-item,
.nav-thread-delete,
.nav-thread-rename-btn {
  color: var(--veslo-muted);
}

.nav-item,
.nav-thread-item {
  font-size: 13px;
  letter-spacing: -0.005em;
}

.nav-room-header,
.nav-thread-row {
  border-right-width: 3px;
  border-right-color: transparent;
}

.nav-room-header:hover,
.nav-thread-row:hover,
.nav-item:hover {
  color: var(--veslo-ink);
  background: var(--nav-hover-bg);
}

.nav-room-header.active,
.nav-thread-row.active,
.nav-item.active {
  color: var(--veslo-accent-strong);
  background: var(--nav-active-bg);
  border-right-color: var(--veslo-accent);
}

.nav-room-header.active .nav-room-item,
.nav-thread-row.active .nav-thread-item {
  color: var(--veslo-accent-strong);
  font-weight: 500;
}

.nav-room-item {
  padding-top: 9px;
  padding-bottom: 9px;
}

.nav-thread-item {
  padding-top: 8px;
  padding-bottom: 8px;
}

.nav-unread-badge {
  min-width: 18px;
  border-radius: 3px;
  color: #ffffff;
  background: var(--veslo-accent);
  font-family: 'DM Mono', ui-monospace, monospace;
  font-weight: 500;
}

.nav-thread-rename {
  border-color: var(--veslo-accent);
  border-radius: 3px;
  background: var(--veslo-surface-solid);
  box-shadow: 0 0 0 2px rgba(0, 168, 200, 0.1);
}

.header {
  padding: 0 clamp(18px, 3vw, 36px);
  background: var(--veslo-surface);
}

.header h2 {
  color: var(--veslo-ink);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: -0.015em;
}

.messages {
  padding: 24px 18px 12px;
  padding-inline: max(18px, calc((100% - var(--veslo-content-width)) / 2));
  scroll-padding-bottom: 120px;
}

.msg {
  margin: 0 -10px;
  padding: 4px 10px;
  border-radius: var(--veslo-radius-control);
  line-height: 1.52;
  transition: background-color 160ms ease;
}

.msg:hover {
  background: var(--msg-hover);
}

.msg-time {
  color: color-mix(in srgb, var(--veslo-ink) 44%, transparent);
  font-family: 'DM Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 11px;
  letter-spacing: 0.01em;
}

.msg-sender {
  color: var(--veslo-blue);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: -0.01em;
}

.msg-text,
.formatted-message {
  color: var(--veslo-ink);
  font-size: 14px;
}

.mention,
.mention-user,
.composer-engaged-chip {
  border-radius: 3px;
  color: var(--veslo-accent-strong);
  background: rgba(0, 168, 200, 0.1);
  font-weight: 500;
}

.interactive-card,
.attachment-drawer,
.msg-attachment-file,
.composer-preview-file,
.composer-preview-text {
  border-color: var(--veslo-line);
  border-radius: var(--veslo-radius-surface);
  background: var(--veslo-surface-solid);
  box-shadow: none;
}

.interactive-card-title {
  color: var(--veslo-blue);
  font-weight: 500;
}

.interactive-card-btn,
.btn {
  border-radius: var(--veslo-radius-control);
  color: #001932;
  background: var(--veslo-accent);
  font-weight: 500;
}

.interactive-card-btn:hover:not(:disabled),
.btn:hover:not(:disabled) {
  background: var(--veslo-accent-hover);
}

.inline-code,
.code-block,
pre,
code {
  border-color: var(--veslo-line);
  border-radius: var(--veslo-radius-control);
  font-family: 'DM Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
}

.composer {
  padding: 12px clamp(18px, 4vw, 48px) 16px;
  border-top-color: var(--veslo-line);
  background: var(--veslo-surface);
}

.composer-box,
.composer-inbox-hint {
  width: 100%;
  max-width: var(--veslo-content-width);
  margin-inline: auto;
  border-color: var(--veslo-line);
  border-radius: var(--veslo-radius-surface);
  background: var(--veslo-surface-solid);
  box-shadow: var(--veslo-composer-shadow);
  transition:
    border-color 160ms ease,
    box-shadow 160ms ease;
}

.composer-box:focus-within {
  border-color: var(--veslo-accent);
  box-shadow:
    0 0 0 2px var(--veslo-accent-ring),
    var(--veslo-composer-shadow);
}

.composer textarea {
  color: var(--veslo-ink);
  caret-color: var(--veslo-accent);
  font-size: 14px;
}

.composer textarea::placeholder {
  color: color-mix(in srgb, var(--veslo-ink) 42%, transparent);
}

.composer-attach,
.composer-send {
  width: 32px;
  height: 32px;
}

.composer-attach:hover:not(:disabled) {
  color: var(--veslo-ink);
  background: var(--nav-hover-bg);
}

.composer-send {
  color: #001932;
  background: var(--veslo-accent);
}

.composer-send:hover:not(:disabled) {
  color: #001932;
  background: var(--veslo-accent-hover);
}

.composer-send:disabled {
  color: var(--veslo-muted);
  background: var(--nav-hover-bg);
}

.sidebar-footer {
  padding: 12px 16px 14px;
  border-top-color: var(--veslo-line);
  background: var(--veslo-sidebar);
}

.theme-toggle {
  --toggle-track: rgba(10, 14, 20, 0.055);
  --toggle-thumb: var(--veslo-surface-solid);
  --toggle-icon: var(--veslo-muted);
  --toggle-icon-active: var(--veslo-ink);
  border-color: var(--veslo-line);
  border-radius: 4px;
  background: var(--toggle-track);
}

[data-theme='dark'] .theme-toggle {
  --toggle-track: rgba(255, 255, 255, 0.06);
  --toggle-thumb: rgba(255, 255, 255, 0.1);
  --toggle-icon: rgba(247, 249, 251, 0.54);
  --toggle-icon-active: #f7f9fb;
}

.theme-toggle-thumb {
  border: 1px solid var(--veslo-line-soft);
  border-radius: 3px;
  box-shadow: 0 2px 8px rgba(0, 25, 50, 0.08);
}

.theme-toggle button {
  padding: 6px 0;
}

.sidebar-logout-btn {
  border-color: var(--veslo-line);
  border-radius: var(--veslo-radius-control);
}

a,
.formatted-message a {
  color: var(--veslo-accent-strong);
  text-decoration-color: color-mix(in srgb, var(--veslo-accent) 40%, transparent);
  text-underline-offset: 0.16em;
}

button,
a,
input,
textarea,
[tabindex] {
  outline-color: var(--veslo-accent);
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
textarea:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid var(--veslo-accent);
  outline-offset: 2px;
}

.auth-screen,
.login-form {
  color: var(--veslo-ink);
  background: var(--veslo-surface);
}

.login-form,
.login-provider-btn,
.login-field input,
.login-submit {
  border-color: var(--veslo-line);
  border-radius: var(--veslo-radius-control);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme='dark']):not([data-theme='light']) .theme-toggle {
    --toggle-track: rgba(255, 255, 255, 0.06);
    --toggle-thumb: rgba(255, 255, 255, 0.1);
    --toggle-icon: rgba(247, 249, 251, 0.54);
    --toggle-icon-active: #f7f9fb;
  }
}

.veslo-mobile-nav-toggle,
.veslo-mobile-nav-close {
  display: none;
}

@media (max-width: 768px) {
  html,
  body,
  #root,
  .layout,
  .main {
    width: 100%;
    min-width: 0;
    height: 100dvh;
    min-height: 100dvh;
    overflow: hidden;
  }

  body.veslo-mobile-nav-locked {
    overflow: hidden;
  }

  .layout {
    position: relative;
  }

  .main,
  .main-body,
  .chat-column {
    width: 100%;
    min-width: 0;
    max-width: 100vw;
    height: 100%;
    min-height: 0;
    overflow: hidden;
  }

  .sidebar {
    position: fixed;
    inset: 0 auto 0 0;
    z-index: 120;
    width: min(86vw, 320px) !important;
    max-width: 320px;
    height: 100dvh;
    min-height: 100dvh;
    border-right: 1px solid var(--veslo-line);
    pointer-events: none;
    visibility: hidden;
    transform: translate3d(-100%, 0, 0);
    box-shadow: none;
    transition:
      transform 200ms ease,
      box-shadow 200ms ease,
      visibility 0s linear 200ms;
  }

  .layout .sidebar:is(:hover, :focus-within) {
    width: min(86vw, 320px) !important;
    box-shadow: none;
  }

  .layout.veslo-mobile-nav-open .sidebar,
  .layout.veslo-mobile-nav-open .sidebar:is(:hover, :focus-within) {
    pointer-events: auto;
    visibility: visible;
    transform: translate3d(0, 0, 0);
    box-shadow: 18px 0 50px rgba(0, 25, 50, 0.2);
    transition-delay: 0s;
  }

  .layout::before {
    content: '';
    position: fixed;
    inset: 0;
    z-index: 110;
    background: rgba(0, 25, 50, 0.38);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition:
      opacity 180ms ease,
      visibility 0s linear 180ms;
  }

  .layout.veslo-mobile-nav-open::before {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transition-delay: 0s;
  }

  .sidebar-show-btn,
  .sidebar-hide-btn,
  .sidebar-resize-handle {
    display: none !important;
  }

  .veslo-mobile-nav-toggle,
  .veslo-mobile-nav-close {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    min-width: 44px;
    height: 44px;
    min-height: 44px;
    padding: 0;
    border: 1px solid var(--veslo-line);
    border-radius: 4px;
    color: var(--veslo-ink);
    background: var(--veslo-surface);
    cursor: pointer;
  }

  .veslo-mobile-nav-toggle {
    position: absolute;
    top: 4px;
    left: 8px;
    z-index: 30;
  }

  .veslo-mobile-nav-toggle svg,
  .veslo-mobile-nav-close svg {
    width: 22px;
    height: 22px;
  }

  .layout .header {
    width: 100%;
    min-width: 0;
    max-width: 100%;
    padding-right: 16px;
    padding-left: 64px;
  }

  .header h2 {
    min-width: 0;
    max-width: 100%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .layout .sidebar .sidebar-header {
    justify-content: space-between;
    padding: 0 8px 0 14px;
  }

  .layout .sidebar .sidebar-header h1.veslo-brand {
    display: inline-flex;
    height: auto;
    margin: 0;
    padding: 0;
    border: 0;
    opacity: 1;
    overflow: visible;
  }

  .layout .sidebar .nav-section-label,
  .layout .sidebar .nav-thread-list,
  .layout .sidebar .hint {
    display: block;
  }

  .layout .sidebar .nav-item-label {
    display: block;
  }

  .layout .sidebar .nav-room-add {
    display: flex;
    opacity: 1;
  }

  .layout .sidebar .nav-item {
    justify-content: flex-start;
    gap: 10px;
    min-height: 44px;
    padding: 10px 16px;
  }

  .layout .sidebar .nav-room-item {
    position: static;
  }

  .layout .sidebar .nav-unread-badge {
    position: static;
    min-width: 18px;
    margin-left: auto;
    padding: 1px 6px;
    font-size: 11px;
    line-height: 16px;
  }

  .layout .sidebar .sidebar-footer {
    padding: 12px 16px 14px;
    padding-bottom: calc(14px + env(safe-area-inset-bottom));
  }

  .layout .sidebar .nav-thread-delete,
  .layout .sidebar .nav-thread-rename-btn {
    display: flex;
    width: 44px;
    min-width: 44px;
    min-height: 44px;
    opacity: 1;
  }

  .layout .sidebar .nav-thread-item,
  .layout .sidebar .nav-thread-item-label {
    min-width: 0;
  }

  .layout .sidebar .nav-thread-row {
    min-width: 0;
    max-width: 100%;
  }

  .sidebar-nav {
    overscroll-behavior: contain;
  }

  .nav-room-header,
  .nav-thread-item,
  .nav-room-caret,
  .nav-room-add,
  .theme-toggle button,
  .sidebar-logout-btn {
    min-height: 44px;
  }

  .nav-room-caret,
  .nav-room-add {
    width: 44px;
    min-width: 44px;
  }

  .messages,
  .composer {
    width: 100%;
    min-width: 0;
    max-width: 100%;
  }

  .messages {
    padding-right: 18px;
    padding-left: 18px;
    overflow-x: hidden;
  }

  .msg,
  .msg-text,
  .formatted-message,
  .interactive-card,
  .msg-attachments,
  .msg-attachment-file,
  .attachment-drawer,
  .attachment-drawer-body,
  .composer-box,
  .composer-input-row,
  .composer-previews,
  .composer-preview,
  .composer-preview-file,
  .composer-preview-text,
  .composer-preview-audio {
    min-width: 0;
    max-width: 100%;
  }

  .msg-text,
  .formatted-message,
  .interactive-card,
  .attachment-chip-name,
  .composer-preview-name,
  .composer-preview-snippet {
    overflow-wrap: anywhere;
    word-break: break-word;
  }

  .formatted-message pre,
  .formatted-message code,
  .formatted-message table,
  .attachment-drawer-code,
  .attachment-drawer-csv-wrap {
    max-width: 100%;
    overflow-x: auto;
  }

  .msg-attachment-image img,
  .msg-attachment-video video,
  .msg-attachment-audio,
  .composer-preview img,
  .composer-preview video,
  .composer-preview audio {
    max-width: 100%;
  }

  .msg-attachment-image img,
  .msg-attachment-video video {
    height: auto;
  }

  .composer {
    padding-right: 16px;
    padding-bottom: calc(16px + env(safe-area-inset-bottom));
    padding-left: 16px;
  }

  .composer textarea {
    min-width: 0;
    max-width: 100%;
    font-size: 16px;
  }

  .composer-attach,
  .composer-send {
    width: 44px;
    min-width: 44px;
    height: 44px;
    min-height: 44px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}