/*
 * 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: #f3f5f7;
  --panel: #ffffff;
  --panel-subtle: #f8f9fb;
  --panel-muted: #f4f6f8;
  --border: #dde2e7;
  --border-soft: #e9edf1;
  --text: #20242a;
  --text-strong: #15181d;
  --muted: #6f7782;

  /* 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: #f0f3f5;
  --code-bg: #f3f5f7;
  --user-bg: #f1f5fa;
  --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: #cbd2d9;
}

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: #c7ced5;
}

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: #9aa1aa;
}

/* 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-subtle);
}

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

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

.splitter::before {
  background: #d7dde3;
}

.pane-head {
  min-height: 44px;
  padding: 8px 12px;
  background: rgba(248, 249, 251, 0.96);
  border-bottom-color: var(--border-soft);
}

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

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

#task-scroll,
#file-list {
  scrollbar-color: #cbd1d7 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: 4px 8px 8px;
}

.task-row {
  margin: 3px 0;
  padding: 9px 10px;
  border: 1px solid transparent;
  border-radius: var(--r-md);
}

.task-row:hover {
  background: var(--panel);
  border-color: var(--border-soft);
  box-shadow: 0 1px 3px rgba(24, 32, 41, 0.04);
}

.task-row.active {
  padding-left: 8px;
  background: var(--accent-soft);
  border-color: #f0d2cf;
  border-left: 3px solid var(--accent);
  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: assistant content reads like a document, not a bubble stack. */

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

#chat-stream {
  gap: 14px;
  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 {
  padding: 8px 0;
  border-color: transparent;
  border-radius: 0;
}

.msg.assistant.live-run {
  padding: 12px 14px;
  border-color: rgba(184, 58, 49, 0.2);
  border-radius: var(--r-lg);
  box-shadow:
    0 0 0 1px rgba(184, 58, 49, 0.05),
    0 8px 24px rgba(184, 58, 49, 0.06);
}

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

.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;
}

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

.tool-call,
.reasoning {
  color: #4f5863;
}

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

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

.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: #fcfcfd;
}

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

#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-color: var(--border-soft);
}

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

.file-row .name {
  color: #30363d;
}

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

.storage-foot .bar {
  height: 5px;
  background: #e5e9ed;
}

/* 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: 46px;
    padding: 7px 10px;
  }

  .pane-head {
    min-height: 42px;
  }

  #chat-stream {
    gap: 12px;
    padding: 14px 12px 18px;
  }

  .msg {
    max-width: 97%;
  }

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

  #chat-form {
    padding: 10px;
  }

  #chat-input {
    min-height: 64px;
  }

  #chat-form .row button {
    min-height: 36px;
  }

  .modal {
    padding: 12px;
  }
}