/* ════════════════════════════════════════════
   AIS Workspace — NotebookLM Style
   ════════════════════════════════════════════ */

/* ── CSS Variables ── */
:root {
  --bg:          #f0ede3;
  --panel-bg:    #ffffff;
  --border:      #e2dfd5;
  --txt:         #1f1f1f;
  --txt-2:       #5f6368;
  --txt-3:       #9aa0a6;
  --accent:      #e67e22;
  --accent-h:    #d35400;
  --dark:        #1a1a2e;
  --dark-h:      #2d2d4e;
  --rad:         18px;       /* panel border-radius */
  --gap:         8px;        /* gap between panels */
  --hh:          54px;       /* header height */
  --trn:         0.22s cubic-bezier(.4,0,.2,1);
  --left-w:      280px;
  --right-w:     300px;
  --min-panel:   160px;
  --shadow:      0 1px 4px rgba(0,0,0,.07), 0 0 0 1px rgba(0,0,0,.04);
}

html, body { height: 100%; margin: 0; }
*, *::before, *::after { box-sizing: border-box; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 14px;
  color: var(--txt);
  background: var(--bg);
  overflow: hidden;
  height: 100vh;
}

.app {
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
}

/* ════════════════════
   TOPBAR
   ════════════════════ */
.topbar {
  height: var(--hh);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 12px;
  background: var(--bg);
  position: relative;
  z-index: 200;
}

.topbar__left,
.topbar__right {
  display: flex;
  align-items: center;
  gap: 6px;
}

/* ── Toggle Buttons (header) ── */
.topbar__toggle {
  width: 36px;
  height: 36px;
  border: none;
  background: transparent;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--txt-2);
  transition: background var(--trn), color var(--trn);
  flex-shrink: 0;
}
.topbar__toggle svg { width: 20px; height: 20px; }
.topbar__toggle:hover { background: rgba(0,0,0,.07); color: var(--txt); }
.topbar__toggle.is-active { background: rgba(0,0,0,.10); color: var(--txt); }

/* ── Logo ── */
.topbar__logo {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  color: var(--txt);
}
.topbar__brand {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -.3px;
}
.topbar__ver {
  font-size: 10px;
  font-weight: 400;
  color: var(--txt-3);
  vertical-align: super;
}

/* ── Center Tab ── */
.topbar__center {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
}
.topbar__tab {
  padding: 7px 22px;
  border: 1.5px solid var(--border);
  border-radius: 20px;
  background: var(--panel-bg);
  font-size: 13px;
  font-weight: 500;
  color: var(--txt-2);
  cursor: pointer;
  transition: all var(--trn);
}
.topbar__tab--active {
  background: var(--dark);
  color: #fff;
  border-color: var(--dark);
}

/* ── User Menu ── */
.user-menu { position: relative; }
.user-menu__avatar {
  width: 32px; height: 32px;
  border-radius: 50%;
  background: linear-gradient(135deg,#667eea,#764ba2);
  color: #fff;
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  transition: box-shadow var(--trn);
}
.user-menu__avatar:hover { box-shadow: 0 0 0 3px rgba(102,126,234,.3); }

.user-menu__dropdown {
  display: none;
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  min-width: 200px;
  background: var(--panel-bg);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: 0 8px 24px rgba(0,0,0,.12);
  z-index: 999;
  overflow: hidden;
}
.user-menu__dropdown.open { display: block; animation: dropIn .15s ease; }
@keyframes dropIn {
  from { opacity:0; transform: translateY(-6px) scale(.97); }
  to   { opacity:1; transform: translateY(0) scale(1); }
}
.user-menu__info { padding: 14px 16px; }
.user-menu__name { font-size:14px; font-weight:600; }
.user-menu__email { font-size:12px; color:var(--txt-3); margin-top:2px; }
.user-menu__sep { border: none; border-top: 1px solid var(--border); margin: 0; }
.user-menu__item {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 10px 16px;
  border: none;
  background: none;
  font-size: 13px;
  color: var(--txt);
  cursor: pointer;
  transition: background var(--trn);
  text-align: left;
}
.user-menu__item svg { width:16px; height:16px; flex-shrink:0; }
.user-menu__item:hover { background: rgba(0,0,0,.04); }

/* ════════════════════
   WORKSPACE
   ════════════════════ */
.workspace {
  flex: 1;
  display: flex;
  align-items: stretch;
  gap: 0;                   /* gaps handled via margin */
  padding: 0 var(--gap) var(--gap);
  overflow: hidden;
  min-height: 0;
}

/* ════════════════════
   PANEL BASE
   ════════════════════ */
.panel {
  display: flex;
  flex-direction: column;
  position: relative;
  flex-shrink: 0;
  min-width: 0;
  overflow: hidden;
  transition: width var(--trn), opacity var(--trn), margin var(--trn);
}

.panel__inner {
  display: flex;
  flex-direction: column;
  height: 100%;
  background: var(--panel-bg);
  border-radius: var(--rad);
  box-shadow: var(--shadow);
  overflow: hidden;
}

/* ── Panel Head ── */
.panel__head {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 14px 16px 10px;
  font-size: 14px;
  font-weight: 600;
  color: var(--txt);
  flex-shrink: 0;
  border-bottom: 1px solid var(--border);
}
.panel__head svg { width:18px; height:18px; color:var(--txt-2); flex-shrink:0; }
.panel__head span { flex: 1; }
.panel__head--doc { border-bottom: 1px solid var(--border); }
.panel__doc-title {
  font-family: 'Courier New', monospace;
  font-size: 14px;
  font-weight: 600;
  flex: 1;
}

/* ── Panel Close Button (inside panel) ── */
.panel__close {
  width: 28px; height: 28px;
  border: none;
  background: transparent;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--txt-3);
  transition: background var(--trn), color var(--trn);
  flex-shrink: 0;
}
.panel__close svg { width:18px; height:18px; }
.panel__close:hover { background: rgba(0,0,0,.07); color: var(--txt); }

/* ── Panel Scroll Area ── */
.panel__scroll {
  flex: 1;
  overflow-y: auto;
  padding: 8px 10px;
  min-height: 0;
}
.panel__scroll::-webkit-scrollbar { width: 4px; }
.panel__scroll::-webkit-scrollbar-thumb { background: #ccc; border-radius: 2px; }

/* ── Panel Footer ── */
.panel__foot {
  flex-shrink: 0;
  padding: 10px 12px 12px;
  border-top: 1px solid var(--border);
}

/* ════════════════════
   PANEL REOPEN TABS
   (shown when panel is collapsed)
   ════════════════════ */
.panel__reopen {
  display: none;               /* hidden by default */
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  background: var(--panel-bg);
  border: 1px solid var(--border);
  border-radius: 0 12px 12px 0;
  box-shadow: 2px 0 8px rgba(0,0,0,.08);
  cursor: pointer;
  padding: 12px 6px;
  z-index: 10;
  color: var(--txt-2);
  transition: background var(--trn), color var(--trn);
}
.panel__reopen:hover { background: #f5f5f5; color: var(--txt); }
.panel__reopen svg { width:18px; height:18px; }
.panel__reopen span {
  font-size: 11px;
  font-weight: 600;
  writing-mode: vertical-lr;
  text-orientation: mixed;
  letter-spacing: 1px;
  color: var(--txt-2);
}

/* Left reopen: tab appears on right edge */
.panel__reopen--left {
  right: 0;
  border-radius: 0 12px 12px 0;
}

/* Right reopen: tab appears on left edge */
.panel__reopen--right {
  left: 0;
  border-radius: 12px 0 0 12px;
  box-shadow: -2px 0 8px rgba(0,0,0,.08);
}
.panel__reopen--right svg { transform: rotate(180deg); }

/* ════════════════════
   LEFT PANEL
   ════════════════════ */
.panel--left {
  width: var(--left-w);
  margin-right: var(--gap);
}
.panel--left.collapsed {
  width: 28px !important;
  min-width: 28px !important;
}
.panel--left.collapsed .panel__inner { opacity: 0; pointer-events: none; }
.panel--left.collapsed .panel__reopen--left { display: flex; }

/* ════════════════════
   CENTER PANEL
   ════════════════════ */
.panel--center {
  flex: 1;
  min-width: var(--min-panel);
}

/* ════════════════════
   RIGHT PANEL
   ════════════════════ */
.panel--right {
  width: var(--right-w);
  margin-left: var(--gap);
}
.panel--right.collapsed {
  width: 28px !important;
  min-width: 28px !important;
}
.panel--right.collapsed .panel__inner { opacity: 0; pointer-events: none; }
.panel--right.collapsed .panel__reopen--right { display: flex; }

/* ════════════════════
   RESIZE HANDLE
   ════════════════════ */
.resize-handle {
  width: 8px;
  flex-shrink: 0;
  cursor: col-resize;
  position: relative;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity var(--trn);
}
.resize-handle::before {
  content: '';
  width: 3px;
  height: 40px;
  background: var(--border);
  border-radius: 2px;
  transition: background var(--trn), height var(--trn);
}
.resize-handle:hover::before,
.resize-handle.dragging::before {
  background: #aaa;
  height: 60px;
}

/* ════════════════════
   WORK ITEMS
   ════════════════════ */
.work-item {
  display: flex;
  flex-direction: column;
  padding: 8px 10px;
  border-radius: 10px;
  cursor: pointer;
  margin-bottom: 2px;
  transition: background var(--trn);
}
.work-item:hover { background: rgba(0,0,0,.04); }
.work-item--active { background: #e8edf8; }
.work-item__date { font-size: 10.5px; color: var(--txt-3); margin-bottom: 2px; }
.work-item__title { font-size: 12.5px; color: var(--txt); line-height: 1.4; }

/* ════════════════════
   UPLOAD ZONE
   ════════════════════ */
.upload-zone {
  border: 1.5px dashed var(--border);
  border-radius: 10px;
  padding: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  cursor: pointer;
  font-size: 12px;
  color: var(--txt-2);
  margin-bottom: 8px;
  transition: all var(--trn);
}
.upload-zone input { display: none; }
.upload-zone svg { width:16px; height:16px; flex-shrink:0; }
.upload-zone:hover,
.upload-zone.drag-over { border-color: var(--accent); background: #fff8f0; color: var(--accent); }

/* File List */
.file-list { margin-bottom: 8px; }
.file-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 8px;
  border-radius: 8px;
  background: #f8f8f5;
  margin-bottom: 5px;
  font-size: 12px;
}
.file-item__icon {
  width: 28px; height: 28px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 9px;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}
.file-item__icon--xlsx { background: #217346; }
.file-item__icon--pdf  { background: #d4362c; }
.file-item__icon--doc  { background: #2b579a; }
.file-item__info { flex: 1; min-width: 0; }
.file-item__name { font-weight: 500; color: var(--txt); display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.file-item__sub  { font-size: 10.5px; color: var(--txt-3); }
.file-item__del  {
  background: none; border: none;
  color: var(--txt-3); cursor: pointer;
  font-size: 16px; line-height: 1;
  padding: 0 2px;
  transition: color var(--trn);
}
.file-item__del:hover { color: #c0392b; }

/* Submit Button */
.btn-submit {
  width: 100%;
  padding: 9px;
  background: var(--dark);
  color: #fff;
  border: none;
  border-radius: 10px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--trn);
}
.btn-submit:hover { background: var(--dark-h); }

/* ════════════════════
   STEPS (Right Panel)
   ════════════════════ */
.steps { margin-bottom: 14px; }
.step {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 7px 8px;
  border-radius: 8px;
  transition: background var(--trn);
}
.step:hover { background: rgba(0,0,0,.03); }
.step__n {
  width: 22px; height: 22px;
  border-radius: 50%;
  background: #e8edf8;
  border: 1.5px solid var(--dark);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10.5px;
  font-weight: 700;
  color: var(--dark);
  flex-shrink: 0;
  transition: all var(--trn);
}
.step:hover .step__n { background: var(--dark); color: #fff; }
.step__t { font-size: 12.5px; color: var(--txt-2); }
.step--empty .step__t { color: var(--txt-3); }

/* Action Buttons */
.action-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 14px;
}
.action-btn {
  width: 100%;
  padding: 10px 14px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 10px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--trn);
  text-align: center;
}
.action-btn:hover { background: var(--accent-h); transform: translateY(-1px); box-shadow: 0 4px 12px rgba(230,126,34,.3); }

/* Dialog Card */
.dialog-card {
  background: #faf9f5;
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 14px;
}
.dialog-card__q { font-size: 13.5px; font-weight: 500; color: var(--txt); margin: 0 0 10px; }
.dialog-card__row { display: flex; align-items: center; gap: 8px; }
.dialog-card__yes {
  flex: 1;
  padding: 8px;
  background: var(--dark);
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--trn);
}
.dialog-card__yes:hover { background: var(--dark-h); }
.dialog-card__arr {
  font-size: 32px;
  color: var(--txt-3);
  line-height: 1;
  cursor: pointer;
  transition: color var(--trn);
  padding: 0 4px;
}
.dialog-card__arr:hover { color: var(--txt); }

/* ════════════════════
   CHAT BAR (NotebookLM style)
   ════════════════════ */
.chat-bar {
  flex-shrink: 0;
  padding: 10px 12px 14px;
}
.chat-bar__input-wrap {
  display: flex;
  align-items: flex-end;
  gap: 8px;
  background: #f5f4ef;
  border: 1.5px solid var(--border);
  border-radius: 28px;
  padding: 6px 6px 6px 18px;
  transition: border-color var(--trn), box-shadow var(--trn);
}
.chat-bar__input-wrap:focus-within {
  border-color: #bbb;
  box-shadow: 0 2px 8px rgba(0,0,0,.09);
}
.chat-bar__textarea {
  flex: 1;
  min-width: 0;
  border: none;
  background: transparent;
  font-size: 13.5px;
  font-family: inherit;
  color: var(--txt);
  resize: none;
  outline: none;
  padding: 7px 0;
  max-height: 120px;
  line-height: 1.5;
}
.chat-bar__textarea::placeholder { color: var(--txt-3); }
.chat-bar__send {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
  border-radius: 50%;
  border: none;
  background: var(--dark);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background var(--trn), transform var(--trn), box-shadow var(--trn);
}
.chat-bar__send svg { width:17px; height:17px; }
.chat-bar__send:hover {
  background: var(--dark-h);
  transform: scale(1.08);
  box-shadow: 0 3px 10px rgba(26,26,46,.3);
}
.chat-bar__send:active { transform: scale(.96); }

/* ════════════════════
   AWB DOCUMENT
   ════════════════════ */
.awb {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  margin-bottom: 8px;
}
.awb__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
}
.awb__col:first-child { border-right: 1px solid var(--border); }
.awb__box { border-bottom: 1px solid var(--border); }
.awb__box:last-child { border-bottom: none; }
.awb__box-hd {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 10px;
  font-weight: 600;
  color: var(--txt-2);
  text-transform: uppercase;
  letter-spacing: .3px;
  padding: 6px 12px;
  background: #faf9f5;
  border-bottom: 1px solid #ede;
}
.awb__box-bd {
  padding: 10px 12px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--txt);
}
.awb__box-bd p { margin: 0 0 2px; }
.awb__box-bd p.sm { font-size: 10.5px; color: var(--txt-2); }
.awb__row { display: flex; gap: 8px; margin-top: 6px; flex-wrap: wrap; }
.awb__f { flex: 1; min-width: 60px; }
.awb__f label { display: block; font-size: 9px; color: var(--txt-3); text-transform: uppercase; font-weight: 600; margin-bottom: 1px; }
.awb__f span { display: block; font-size: 11px; padding: 2px 0; border-bottom: 1px solid #eee; min-height: 18px; }
.awb__badge { display: inline-block; padding: 1px 7px; background: #eee; border-radius: 4px; font-size: 9px; font-weight: 700; color: var(--txt-2); margin-left: auto; text-transform: none; }
.awb__chk { font-size: 10px; font-weight: 400; color: var(--txt-3); display: flex; align-items: center; gap: 3px; margin-left: auto; text-transform: none; }
.awb__chk input[type="checkbox"] { width: 12px; height: 12px; accent-color: var(--dark); }
.awb__export { display: inline-block; margin-top: 6px; padding: 3px 10px; background: #fff3e0; border: 1px solid #ffc107; border-radius: 5px; font-size: 11.5px; font-weight: 700; color: #e65100; }

/* ════════════════════
   RESPONSIVE
   ════════════════════ */
@media (max-width: 960px) {
  :root { --left-w: 240px; --right-w: 260px; }
}

@media (max-width: 768px) {
  .workspace { padding: 0 4px 4px; }

  .panel--left,
  .panel--right {
    position: fixed;
    top: var(--hh);
    bottom: 4px;
    z-index: 150;
    width: 280px !important;
    transition: transform var(--trn), opacity var(--trn);
    margin: 0;
  }

  .panel--left  { left: 4px; }
  .panel--right { right: 4px; }

  .panel--left.collapsed  { transform: translateX(calc(-100% - 8px)); opacity: 0; pointer-events: none; }
  .panel--right.collapsed { transform: translateX(calc(100% + 8px));  opacity: 0; pointer-events: none; }

  /* On mobile, reopen tabs show differently */
  .panel--left.collapsed  .panel__reopen--left  { display: none; }
  .panel--right.collapsed .panel__reopen--right { display: none; }

  .resize-handle { display: none; }

  .topbar__center { position: static; transform: none; }

  .awb__grid { grid-template-columns: 1fr; }
  .awb__col:first-child { border-right: none; border-bottom: 1px solid var(--border); }
}

@media (max-width: 480px) {
  :root { --hh: 48px; }
  .topbar { padding: 0 8px; }
  .topbar__brand { font-size: 16px; }
  .topbar__tab { padding: 5px 14px; font-size: 12px; }
}