/*
 * zcbot UI foundation
 *
 * The application intentionally stays build-free. This file is the shared
 * visual layer for the main SPA: tokens, control states and restrained
 * workspace polish. Feature-specific layout remains next to dev.html until
 * it is reused by a second surface.
 */

:root {
  color-scheme: light;

  /* Neutral workspace palette */
  --bg: #ffffff;
  --panel: #ffffff;
  --panel-subtle: #fcfcfc;
  --panel-muted: #f8f8f8;
  --border: #e1e3e5;
  --border-soft: #eceeef;
  --list-divider: #d9dde0;
  --text: #242424;
  --text-strong: #171717;
  --muted: #73777c;

  /* Institute red is deliberately reserved for primary emphasis. */
  --accent: #b83a31;
  --accent-hover: #a9322a;
  --accent-soft: #fbecea;
  --accent-ring: rgba(184, 58, 49, 0.16);

  --hover: #f7f7f7;
  --code-bg: #f7f7f7;
  --user-bg: #f6f8fa;
  --asst-bg: #ffffff;

  --c-green: #238653;
  --c-green-bg: #eaf6ef;
  --c-green-bd: #a9d9bd;
  --c-blue: #2d6f9f;
  --c-blue-bg: #edf5fa;
  --c-blue-bd: #b5d5e7;
  --c-purple: #7c5192;
  --c-purple-bg: #f5eff8;
  --c-purple-bd: #d8c4e1;
  --c-orange: #bf6a20;
  --c-orange-bg: #fdf3e8;
  --c-orange-bd: #ebc79f;
  --c-red: #b83a31;
  --c-red-bg: #fbecea;
  --c-red-bd: #e7b3ae;

  /* One compact radius and spacing vocabulary. */
  --r-sm: 4px;
  --r-md: 6px;
  --r-lg: 8px;
  --r-xl: 10px;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;

  --shadow-float: 0 10px 30px rgba(24, 32, 41, 0.12);
  --shadow-card: 0 18px 48px rgba(24, 32, 41, 0.16);
  --shadow-card-lg:
    0 24px 72px rgba(24, 32, 41, 0.14),
    0 2px 8px rgba(24, 32, 41, 0.06);
  --mono: ui-monospace, "Cascadia Code", "SF Mono", Consolas, monospace;
  --t: background-color 0.15s ease, border-color 0.15s ease,
    color 0.15s ease, box-shadow 0.15s ease, transform 0.15s ease;
}

body {
  font-size: 14px;
  line-height: 1.55;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

button,
input,
textarea,
select {
  transition: var(--t);
}

button {
  min-height: 32px;
  padding: 5px 11px;
  font-weight: 500;
}

button.small {
  min-height: 28px;
}

button:hover:not(:disabled) {
  border-color: #cbd1d6;
}

button.primary {
  background: var(--accent);
  border-color: var(--accent);
  box-shadow: 0 1px 2px rgba(73, 25, 21, 0.16);
}

button.primary:hover:not(:disabled) {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  filter: none;
}

button:disabled {
  opacity: 0.46;
}

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

input:not([type="checkbox"]):not([type="radio"]):not([type="file"]),
textarea,
select {
  min-height: 34px;
  border-color: var(--border);
}

input:not([type="checkbox"]):not([type="radio"]):not([type="file"]):hover,
textarea:hover,
select:hover {
  border-color: #c7cdd2;
}

input:not([type="checkbox"]):not([type="radio"]):not([type="file"]):focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-ring);
}

::placeholder {
  color: #999fa5;
}

/* Application shell */

#app.ready {
  background: var(--bg);
}

header {
  min-height: 48px;
  padding: 9px 16px;
  border-bottom-color: var(--border);
  box-shadow: 0 1px 0 rgba(24, 32, 41, 0.02);
}

header .brand {
  gap: 10px;
}

header .brand .logo {
  width: 26px;
  height: 26px;
  box-shadow: 0 2px 8px rgba(184, 58, 49, 0.2);
}

header .title {
  color: var(--text-strong);
  font-size: 15px;
  letter-spacing: 0.1px;
}

header .who {
  color: var(--muted);
}

.pane {
  border-color: var(--border);
}

#pane-left,
#pane-right {
  background: var(--panel);
}

#pane-mid {
  background: var(--panel);
}

.splitter {
  background: var(--bg);
}

.splitter::before {
  background: #d7dce0;
}

.pane-head {
  min-height: 44px;
  padding: 8px 12px;
  background: var(--panel);
  border-bottom-color: var(--border-soft);
}

.pane-head .label {
  color: var(--text-strong);
  font-size: 13px;
  letter-spacing: 0.2px;
}

#btn-toggle-hidden[aria-pressed="true"] {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-soft);
}

#pane-left .pane-head + .pane-head {
  background: var(--panel);
}

#task-scroll,
#file-list {
  scrollbar-color: #cbd1d6 transparent;
  scrollbar-width: thin;
}

/* Task and resource navigation */

#channel-cards {
  padding: 8px 10px 4px;
}

.channel-card {
  border-color: rgba(7, 158, 82, 0.26);
  background: rgba(7, 158, 82, 0.045);
}

#task-list {
  padding: 0;
}

.task-row {
  margin: 0;
  padding: 10px 12px 10px 9px;
  border: 0;
  border-left: 3px solid transparent;
  border-bottom: 1px solid var(--list-divider);
  border-radius: 0;
}

.task-row:hover {
  background: var(--hover);
  box-shadow: none;
}

.task-row.active {
  padding-left: 9px;
  background: var(--accent-soft);
  border-left: 3px solid var(--accent);
  border-bottom-color: #e8c6c3;
  box-shadow: none;
}

.task-row .desc {
  color: var(--text-strong);
}

.task-row .meta {
  color: var(--muted);
}

.task-row .badge,
.sk-badge {
  border-radius: var(--r-sm);
}

#rail-resources {
  padding: 8px;
  border-top-color: var(--border-soft);
  background: var(--panel);
}

#rail-resources > button {
  min-height: 48px;
  border-color: transparent;
  color: #59616b;
  background: transparent;
}

#rail-resources > button:hover {
  color: var(--accent);
  border-color: #f0d2cf;
  background: var(--accent-soft);
}

/* Menus and lightweight cards */

#floating-menu,
#media-model-pop {
  border-color: var(--border);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-float);
}

.dd-item {
  padding: 7px 14px;
}

.dd-item:hover {
  background: var(--panel-muted);
}

.sk-item {
  padding: 9px 10px;
  border-color: var(--border-soft);
  background: var(--panel);
}

.sk-item:hover {
  border-color: #d2a09b;
  background: var(--accent-soft);
}

.sk-item.active {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.empty,
.sk-empty {
  color: var(--muted);
  line-height: 1.7;
}

/* Conversation: one left-anchored reading rail, with each assistant turn grouped
   as a document block rather than a floating chat label. */

#chat-meta {
  min-height: 40px;
  padding: 8px 16px;
  background: var(--panel);
  border-bottom-color: var(--border-soft);
}

#chat-stream {
  gap: 16px;
  padding: 20px clamp(16px, 3vw, 36px) 24px;
  background: var(--panel);
  scrollbar-color: #cbd1d7 transparent;
  scrollbar-width: thin;
}

.msg {
  padding: 10px 13px;
  border-color: var(--border-soft);
  border-radius: var(--r-lg);
}

.msg.user {
  background: var(--user-bg);
  border-color: #dce6f0;
}

.msg.assistant {
  width: min(100%, 52rem);
  max-width: min(100%, 52rem);
  align-self: flex-start;
  padding: 3px 0 18px;
  border: 0;
  border-bottom: 1px solid var(--border-soft);
  border-radius: 0;
  background: transparent;
}

.msg.assistant.live-run {
  padding: 3px 0 18px;
  border: 0;
  border-bottom: 1px solid var(--border-soft);
  border-radius: 0;
  box-shadow: none;
}

.msg .role {
  margin-bottom: 4px;
  color: #7d858f;
  font-family: inherit;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.2px;
}

.msg.assistant > .role {
  display: none;
}

.msg.tool {
  width: min(100%, 52rem);
  max-width: min(100%, 52rem);
  align-self: flex-start;
  padding: 0;
  border: 0;
  background: transparent;
}

.msg.tool > .role {
  display: none;
}

#task-progress-dock .task-progress {
  width: min(100%, 52rem);
  max-width: 52rem;
  margin: 0;
}

.msg .body {
  color: var(--text);
  font-size: 15px;
  line-height: 1.7;
}

.msg .body p {
  margin: 0.65em 0;
}

.msg .body h1,
.msg .body h2,
.msg .body h3 {
  color: var(--text-strong);
  line-height: 1.35;
}

.mermaid-diagram {
  margin: 14px 0;
  padding: 14px;
  overflow-x: auto;
  border: 1px solid var(--border-soft);
  border-radius: var(--r-lg);
  background: #ffffff;
}

.mermaid-viewport {
  min-width: min-content;
}

.mermaid-viewport svg {
  display: block;
  max-width: 100%;
  height: auto;
  margin: 0 auto;
}

.mermaid-notice {
  margin: 10px 0 4px;
  padding: 7px 9px;
  color: var(--muted);
  border-left: 3px solid var(--border);
  background: var(--panel-muted);
  font-size: 12px;
}

.mermaid-notice.error {
  color: var(--c-red);
  border-left-color: var(--c-red);
}

.msg-actions {
  margin-top: 8px;
}

.tool-call,
.reasoning {
  color: #555b60;
}

.reasoning summary {
  padding: 6px 8px;
  border: 1px solid var(--border-soft);
  border-radius: var(--r-md);
  background: var(--panel-muted);
}

.reasoning summary:hover {
  background: var(--hover);
}

.tool-call.activity {
  margin: 3px 0;
}

.tool-call.activity > summary {
  display: flex;
  align-items: center;
  min-height: 28px;
  gap: 7px;
  padding: 3px 6px;
  color: var(--muted);
  border: 0;
  border-radius: var(--r-md);
  background: transparent;
  list-style: none;
}

.tool-call.activity > summary::-webkit-details-marker {
  display: none;
}

.tool-call.activity > summary::after {
  content: "›";
  flex: none;
  margin-left: 2px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1;
  transform: rotate(0deg);
  transition: transform 0.15s ease;
}

.tool-call.activity[open] > summary::after {
  transform: rotate(90deg);
}

.tool-call.activity > summary:hover,
.tool-call.activity[open] > summary {
  color: var(--text);
  background: var(--hover);
}

.tool-call.activity .tool-state {
  width: 16px;
  flex: none;
  color: var(--c-green);
  font-family: var(--mono);
  font-weight: 700;
  text-align: center;
}

.tool-call.activity.running .tool-state {
  color: var(--muted);
}

.tool-call.activity.failed > summary,
.tool-call.activity.failed .tool-state {
  color: var(--c-red);
}

.tool-call.activity .tool-label {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.tool-call.activity .tool-result-meta {
  margin-left: auto;
  color: var(--muted);
  font-size: 11px;
  white-space: nowrap;
}

.tool-call.activity > pre {
  margin: 3px 0 5px 23px;
}

.tool-call pre {
  border: 1px solid var(--border-soft);
  background: var(--code-bg);
}

#chat-form {
  gap: 8px;
  padding: 12px 16px 14px;
  border-top-color: var(--border-soft);
  background: var(--panel);
  box-shadow: 0 -8px 24px rgba(24, 32, 41, 0.035);
}

#chat-input {
  min-height: 72px;
  padding: 10px 12px;
  line-height: 1.6;
  border-radius: var(--r-lg);
  background: #ffffff;
}

#chat-form .row {
  align-items: center;
}

#chat-hint:empty {
  display: none;
}

.composer-spacer {
  flex: 1;
}

.composer-tool {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
}

.composer-tool svg {
  width: 15px;
  height: 15px;
  flex: none;
}

#chat-action {
  min-width: 64px;
}

/* File pane */

.crumbs {
  min-height: 38px;
  padding: 9px 12px;
  background: var(--panel);
  border-bottom-color: var(--border-soft);
}

.file-row {
  min-height: 38px;
  padding: 7px 12px;
  border-bottom: 1px solid var(--list-divider);
}

.file-row:hover {
  background: var(--hover);
}

.file-row .name {
  color: #303438;
}

.storage-foot {
  padding: 8px 12px;
  border-top-color: var(--border-soft);
  background: var(--panel);
}

.storage-foot .bar {
  height: 5px;
  background: #e5e8ea;
}

/* Dialogs and notifications */

.modal {
  padding: 16px;
  background: rgba(22, 28, 35, 0.46);
}

.modal > .card {
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.72);
  box-shadow: var(--shadow-card);
}

#chpw-modal h3,
#app-dialog h3,
#changelog-modal h3,
#skills-modal h3,
#wechat-modal h3,
#crons-modal h3,
#memory-modal h3,
#kb-modal h3 {
  min-height: 48px;
  padding: 13px 18px;
  color: var(--text-strong);
  border-bottom-color: var(--border-soft);
}

#app-dialog .body,
#chpw-modal .body {
  padding: 18px;
}

#app-dialog .actions,
#chpw-modal .actions,
#src-picker-modal .actions {
  padding: 12px 18px;
  border-top-color: var(--border-soft);
  background: var(--panel-subtle);
}

.toast,
.app-msg {
  border: 1px solid var(--border-soft);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-float);
}

/* Respect system motion preferences for polish-only transitions too. */

@media (prefers-reduced-motion: reduce) {
  button,
  input,
  textarea,
  select {
    transition: none;
  }
}

@media (max-width: 640px) {
  header {
    min-height: 42px;
    padding: 5px 9px;
  }

  .pane-head {
    min-height: 36px;
  }

  .mobile-tabs {
    gap: 5px;
  }

  .mobile-tabs button {
    min-height: 34px;
    padding: 4px 7px;
    font-size: 11.5px;
  }

  #hd-admin {
    padding: 4px 8px;
    font-size: 11px;
  }

  #pane-mid > .pane-head {
    min-height: 34px;
    padding: 4px 8px;
  }

  #pane-mid > .pane-head > button {
    min-height: 28px;
    padding: 3px 8px;
    font-size: 11.5px;
  }

  #chat-meta {
    min-height: auto;
    padding: 5px 8px;
    column-gap: 5px;
    row-gap: 5px;
  }

  #chat-meta > .spacer {
    flex: 1 0 100%;
    height: 0;
  }

  #chat-meta .mdl-wrap {
    flex: 1 1 auto;
    min-width: 0;
  }

  #chat-meta.draft-meta .mdl-wrap {
    flex: 0 1 auto;
  }

  #chat-meta.draft-meta select {
    width: auto !important;
    max-width: 48vw;
  }

  #chat-meta select {
    width: 100% !important;
    max-width: none;
    min-height: 30px;
    padding: 2px 6px;
    font-size: 12px;
  }

  #chat-meta button {
    min-height: 30px;
    padding: 2px 7px;
    font-size: 11.5px;
  }

  #task-progress-dock {
    padding: 5px 8px;
  }

  #chat-stream {
    gap: 11px;
    padding: 10px 10px 12px;
  }

  .msg {
    max-width: 100%;
  }

  .msg.assistant {
    width: 100%;
    max-width: 100%;
    padding: 2px 0 14px;
  }

  .msg.tool {
    width: 100%;
    max-width: 100%;
    padding: 0;
  }

  .msg .body {
    font-size: 15px;
    line-height: 1.68;
  }

  #chat-form {
    padding: 8px 9px;
    padding-bottom: calc(8px + env(safe-area-inset-bottom, 0px));
  }

  #chat-input {
    min-height: 52px;
  }

  #chat-form .row {
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 6px;
  }

  #chat-hint {
    order: -1;
    flex: 1 0 100%;
    line-height: 18px;
  }

  .composer-spacer {
    display: none;
  }

  #chat-form .row .composer-tool {
    width: 40px;
    min-width: 40px;
    height: 40px;
    min-height: 40px;
    padding: 0;
  }

  .composer-tool svg {
    width: 18px;
    height: 18px;
  }

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

  #chat-action {
    width: 68px;
    min-width: 68px;
    height: 40px;
    min-height: 40px;
    padding: 5px 12px;
  }

  .modal {
    padding: 12px;
  }
}