/* ============================================================
   SiteView CSS v2
   Layout: [Left: Drawing List] [Centre: Viewer] [Right: Search+Disciplines]
   ============================================================ */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:       #0d1018;
  --surface:  #161a26;
  --surface2: #1e2233;
  --surface3: #252a3a;
  --border:   rgba(255,255,255,0.07);
  --border2:  rgba(255,255,255,0.13);
  --text:     #dfe3f0;
  --text2:    #7a80a0;
  --text3:    #4a5070;
  --accent:   #3d7ef5;
  --accent2:  #2460d0;
  --green:    #27c47e;
  --amber:    #f0a020;
  --red:      #e04040;
  --font:     'DM Sans', sans-serif;
  --display:  'Syne', sans-serif;
  --mono:     'DM Mono', monospace;
}

html, body { height: 100%; background: var(--bg); color: var(--text); font-family: var(--font); font-size: 15px; overflow: hidden; }

.screen { position: fixed; inset: 0; }
.hidden { display: none !important; }

/* ── AUTH ────────────────────────────────────── */
#auth-screen { display: flex; align-items: center; justify-content: center; }
.auth-bg { position: absolute; inset: 0; background: radial-gradient(ellipse 80% 60% at 50% 0%, rgba(61,126,245,0.12) 0%, transparent 70%); }
.auth-grid { position: absolute; inset: 0; background-image: linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px); background-size: 40px 40px; }
.auth-card { position: relative; background: var(--surface); border: 1px solid var(--border2); border-radius: 18px; padding: 40px; width: 420px; max-width: 95vw; }
.auth-logo { font-family: var(--display); font-size: 28px; font-weight: 700; letter-spacing: -1px; margin-bottom: 4px; }
.auth-logo span { color: var(--accent); }
.auth-tagline { font-size: 13px; color: var(--text2); margin-bottom: 32px; }
.auth-panel h2 { font-family: var(--display); font-size: 18px; font-weight: 600; margin-bottom: 20px; }
.auth-switch { text-align: center; font-size: 13px; color: var(--text2); margin-top: 16px; }
.auth-switch a { color: var(--accent); text-decoration: none; }
.auth-error { background: rgba(224,64,64,0.12); border: 1px solid rgba(224,64,64,0.3); border-radius: 8px; padding: 10px 14px; font-size: 13px; color: var(--red); margin-top: 12px; }

/* ── PROJECTS ────────────────────────────────── */
#projects-screen { display: flex; flex-direction: column; overflow: hidden; }
.proj-topbar { display: flex; align-items: center; gap: 16px; padding: 0 28px; height: 68px; background: var(--surface); border-bottom: 1px solid var(--border); flex-shrink: 0; }
.user-email { font-size: 13px; color: var(--text2); }
.proj-body { flex: 1; overflow-y: auto; padding: 40px 48px; }
.proj-header { display: flex; align-items: flex-start; justify-content: space-between; margin-bottom: 28px; }
.proj-header h1 { font-family: var(--display); font-size: 28px; font-weight: 700; letter-spacing: -0.5px; }
.proj-header p { color: var(--text2); font-size: 14px; margin-top: 4px; }
.projects-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 16px; }
.project-card { background: var(--surface); border: 1px solid var(--border2); border-radius: 14px; padding: 24px; cursor: pointer; transition: border-color 0.15s, background 0.15s; }
.project-card:hover { background: var(--surface2); border-color: rgba(61,126,245,0.4); }
.project-card h3 { font-family: var(--display); font-size: 17px; font-weight: 600; margin-bottom: 6px; }
.project-card p { font-size: 13px; color: var(--text2); }
.pc-meta { display: flex; gap: 12px; margin-top: 16px; font-size: 12px; color: var(--text3); }
.loading-projects { color: var(--text2); font-size: 14px; padding: 20px 0; }

/* ── MAIN APP — 3 COLUMN GRID ────────────────── */
/* topbar | topbar | topbar
   left   | centre | right   */
#app {
  display: grid;
  grid-template-rows: 64px 1fr;
  grid-template-columns: 260px 1fr 220px;
  height: 100vh;
}

/* ── TOPBAR (spans all 3 columns) ────────────── */
#topbar {
  grid-column: 1 / -1;
  display: flex; align-items: center; gap: 12px; padding: 0 16px;
  background: var(--surface); border-bottom: 1px solid var(--border);
}
.logo { font-family: var(--display); font-size: 20px; font-weight: 700; letter-spacing: -0.5px; }
.logo span { color: var(--accent); }
.project-name-bar { font-size: 13px; color: var(--text2); border-left: 1px solid var(--border2); padding-left: 14px; }
.back-btn { display: flex; align-items: center; justify-content: center; width: 32px; height: 32px; border-radius: 8px; border: 1px solid var(--border2); background: transparent; color: var(--text2); cursor: pointer; transition: background 0.1s; }
.back-btn:hover { background: var(--surface2); }
.topbar-btns { display: flex; gap: 8px; margin-left: auto; }

/* ── LEFT SIDEBAR — scrollable drawing list ──── */
#sidebar {
  background: var(--surface); border-right: 1px solid var(--border);
  display: flex; flex-direction: column; overflow: hidden; min-height: 0;
}
.sidebar-label { font-size: 10px; font-weight: 600; letter-spacing: 1.2px; text-transform: uppercase; color: var(--text3); }
.drawing-count-bar { padding: 8px 14px; border-top: 1px solid var(--border); font-size: 11px; color: var(--text3); flex-shrink: 0; }

/* Scrollable drawing list */
#drawing-list {
  flex: 1;
  overflow-y: auto;
  padding: 4px 6px;
  scrollbar-width: thin;
  scrollbar-color: var(--border2) transparent;
  min-height: 0;
}
#drawing-list::-webkit-scrollbar { width: 4px; }
#drawing-list::-webkit-scrollbar-track { background: transparent; }
#drawing-list::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 2px; }

.drawing-item { display: flex; align-items: flex-start; gap: 10px; padding: 10px; border-radius: 8px; cursor: pointer; transition: background 0.1s; margin-bottom: 2px; border: 1px solid transparent; }
.drawing-item:hover { background: var(--surface2); }
.drawing-item.active { background: rgba(61,126,245,0.1); border-color: rgba(61,126,245,0.28); }
.drawing-thumb { width: 40px; height: 40px; border-radius: 6px; background: var(--surface2); border: 1px solid var(--border); flex-shrink: 0; display: flex; align-items: center; justify-content: center; }
.drawing-info { flex: 1; min-width: 0; }
.drawing-num { font-size: 11px; font-weight: 500; font-family: var(--mono); color: var(--accent); }
.drawing-title-list { font-size: 12px; font-weight: 500; color: var(--text); margin: 2px 0; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.drawing-meta { display: flex; align-items: center; gap: 4px; flex-wrap: wrap; }
.rev-badge { font-size: 10px; padding: 1px 5px; border-radius: 4px; font-family: var(--mono); }
.rev-badge.current { background: rgba(39,196,126,0.14); color: var(--green); }
.rev-badge.superseded { background: rgba(240,160,32,0.14); color: var(--amber); }
.disc-badge { font-size: 10px; padding: 1px 5px; border-radius: 4px; background: var(--surface3); }

/* ── CENTRE — Viewer ─────────────────────────── */
#main { display: flex; flex-direction: column; overflow: hidden; min-height: 0; }

#viewer-toolbar {
  display: flex; align-items: center; gap: 6px; padding: 7px 12px;
  background: var(--surface); border-bottom: 1px solid var(--border); flex-shrink: 0; flex-wrap: wrap;
}
.drawing-num-bar  { font-size: 11px; font-family: var(--mono); color: var(--accent); }
.drawing-title-bar { font-size: 13px; font-weight: 600; color: var(--text); }

.tool-group { display: flex; align-items: center; gap: 2px; }
.tool-btn { display: flex; align-items: center; justify-content: center; width: 34px; height: 34px; border-radius: 7px; border: 1px solid var(--border2); background: transparent; color: var(--text); cursor: pointer; font-size: 15px; font-family: var(--font); transition: background 0.1s; }
.tool-btn.wide { width: auto; padding: 0 10px; font-size: 12px; }
.tool-btn.small { width: 26px; height: 26px; font-size: 12px; }
.tool-btn.nav-btn { width: 34px; height: 34px; }
.tool-btn:hover { background: var(--surface2); }
.tool-btn:disabled { opacity: 0.35; cursor: not-allowed; }
.zoom-display { font-size: 12px; font-family: var(--mono); color: var(--text2); min-width: 42px; text-align: center; }
.drawing-index-label { font-size: 12px; font-family: var(--mono); color: var(--text2); min-width: 40px; text-align: center; }

#main-inner { display: flex; flex: 1; overflow: hidden; min-height: 0; }
#viewer-area { flex: 1; display: flex; flex-direction: column; overflow: hidden; min-height: 0; }

#canvas-wrap { flex: 1; overflow: hidden; position: relative; background: #07080d; cursor: grab; min-height: 0; }
#canvas-wrap.dragging { cursor: grabbing; }
#pdf-canvas { position: absolute; transform-origin: 0 0; }

.empty-state { position: absolute; inset: 0; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 12px; }
.empty-icon  { font-size: 44px; opacity: 0.2; }
.empty-title { font-size: 17px; font-weight: 500; color: var(--text2); }
.empty-sub   { font-size: 13px; color: var(--text3); text-align: center; line-height: 1.6; }

#page-bar { display: flex; align-items: center; gap: 8px; padding: 5px 12px; background: var(--surface); border-top: 1px solid var(--border); font-size: 12px; color: var(--text2); flex-shrink: 0; flex-wrap: wrap; }
#page-bar input { width: 40px; padding: 3px 6px; background: var(--surface2); border: 1px solid var(--border); border-radius: 5px; color: var(--text); font-family: var(--mono); font-size: 12px; text-align: center; outline: none; }

.superseded-badge { background: rgba(240,160,32,0.15); border: 1px solid rgba(240,160,32,0.3); color: var(--amber); padding: 2px 8px; border-radius: 4px; font-size: 11px; }

/* ── REVISION PANEL ──────────────────────────── */
#rev-panel { width: 240px; background: var(--surface); border-left: 1px solid var(--border); display: flex; flex-direction: column; overflow: hidden; transition: width 0.2s; flex-shrink: 0; }
#rev-panel.collapsed { width: 0; border: none; overflow: hidden; }
.rev-header { padding: 12px; border-bottom: 1px solid var(--border); display: flex; align-items: center; justify-content: space-between; flex-shrink: 0; }
.rev-header h3 { font-size: 13px; font-weight: 600; }
#rev-list { flex: 1; overflow-y: auto; padding: 8px; scrollbar-width: thin; scrollbar-color: var(--border2) transparent; }
.rev-item { padding: 10px; border-radius: 8px; margin-bottom: 6px; border: 1px solid var(--border); background: var(--surface2); cursor: pointer; transition: border-color 0.1s; }
.rev-item:hover { border-color: var(--border2); }
.rev-item.active-rev { border-color: var(--accent); background: rgba(61,126,245,0.08); }
.rev-row  { display: flex; justify-content: space-between; align-items: center; }
.rev-num  { font-family: var(--mono); font-size: 12px; font-weight: 500; }
.rev-date { font-size: 11px; color: var(--text2); }
.rev-desc { font-size: 11px; color: var(--text2); margin-top: 3px; }

/* ── RIGHT SIDEBAR — Search + Disciplines ────── */
#right-sidebar {
  background: var(--surface); border-left: 1px solid var(--border);
  display: flex; flex-direction: column; overflow-y: auto; overflow-x: hidden;
  scrollbar-width: thin; scrollbar-color: var(--border2) transparent;
}
.sidebar-section { padding: 14px; }

.search-wrap { position: relative; }
.search-wrap svg { position: absolute; left: 10px; top: 50%; transform: translateY(-50%); color: var(--text2); pointer-events: none; }
#search { width: 100%; padding: 8px 10px 8px 32px; background: var(--surface2); border: 1px solid var(--border); border-radius: 8px; color: var(--text); font-family: var(--font); font-size: 13px; outline: none; }
#search:focus { border-color: var(--accent); }
#search::placeholder { color: var(--text3); }

.disc-filters { display: flex; flex-direction: column; gap: 4px; }
.disc-chip { display: flex; align-items: center; gap: 7px; padding: 8px 10px; border-radius: 8px; border: 1px solid var(--border2); background: transparent; color: var(--text2); font-family: var(--font); font-size: 12px; cursor: pointer; transition: all 0.12s; text-align: left; width: 100%; }
.disc-chip.active { background: rgba(61,126,245,0.15); border-color: rgba(61,126,245,0.4); color: var(--text); }
.disc-chip:hover { background: var(--surface2); }
.disc-chip .dot { width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; }

/* ── BUTTONS & FORMS ─────────────────────────── */
.btn { display: inline-flex; align-items: center; gap: 7px; padding: 8px 14px; border-radius: 8px; border: 1px solid var(--border2); background: transparent; color: var(--text); font-family: var(--font); font-size: 13px; font-weight: 500; cursor: pointer; transition: background 0.12s; white-space: nowrap; }
.btn:hover { background: var(--surface2); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.primary:hover { background: var(--accent2); border-color: var(--accent2); }
.btn.full { width: 100%; justify-content: center; padding: 11px; }

.modal-overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.65); display: flex; align-items: center; justify-content: center; z-index: 100; }
.modal { background: var(--surface); border: 1px solid var(--border2); border-radius: 16px; padding: 26px; width: 540px; max-width: 96vw; max-height: 90vh; overflow-y: auto; }
.modal.narrow { width: 420px; }
.modal h2 { font-family: var(--display); font-size: 18px; font-weight: 600; margin-bottom: 18px; }

.form-row { margin-bottom: 13px; }
.form-row label { display: block; font-size: 12px; color: var(--text2); margin-bottom: 5px; font-weight: 500; }
.form-row input, .form-row select { width: 100%; padding: 9px 12px; background: var(--surface2); border: 1px solid var(--border2); border-radius: 8px; color: var(--text); font-family: var(--font); font-size: 13px; outline: none; }
.form-row input:focus, .form-row select:focus { border-color: var(--accent); }
.form-row select option { background: var(--surface2); }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0 14px; }

.upload-zone { border: 1.5px dashed var(--border2); border-radius: 10px; padding: 22px; text-align: center; cursor: pointer; transition: all 0.15s; }
.upload-zone:hover, .upload-zone.drag-over { border-color: var(--accent); background: rgba(61,126,245,0.05); }
.uz-icon { font-size: 26px; margin-bottom: 6px; }
.uz-title { font-size: 13px; font-weight: 500; color: var(--text); }
.upload-zone p { font-size: 12px; color: var(--text2); margin-top: 3px; }
.uz-file { color: var(--accent) !important; margin-top: 5px !important; }

.upload-progress { margin-top: 10px; }
.progress-bar { height: 4px; background: var(--surface3); border-radius: 2px; overflow: hidden; }
.progress-fill { height: 100%; background: var(--accent); width: 0%; transition: width 0.3s; border-radius: 2px; }
.upload-progress span { font-size: 12px; color: var(--text2); display: block; margin-top: 5px; }

.modal-footer { display: flex; gap: 10px; justify-content: flex-end; margin-top: 20px; padding-top: 16px; border-top: 1px solid var(--border); }
.notice { border-radius: 8px; padding: 10px 13px; font-size: 13px; margin-bottom: 16px; }
.notice.info { background: rgba(61,126,245,0.1); border: 1px solid rgba(61,126,245,0.2); color: #8ab4f8; }
.color-input { width: 40px; height: 36px; border-radius: 8px; border: 1px solid var(--border2); background: var(--surface2); cursor: pointer; padding: 2px; }

.disc-edit-row { display: flex; align-items: center; gap: 10px; padding: 8px 0; border-bottom: 1px solid var(--border); }
.disc-edit-dot { width: 12px; height: 12px; border-radius: 50%; flex-shrink: 0; }
.disc-edit-name { flex: 1; font-size: 13px; }
.disc-edit-count { font-size: 12px; color: var(--text2); }

/* ── AI STATUS ───────────────────────────────── */
.ai-status { display: flex; align-items: center; gap: 10px; background: rgba(61,126,245,0.1); border: 1px solid rgba(61,126,245,0.25); border-radius: 8px; padding: 10px 14px; font-size: 13px; color: #8ab4f8; margin-bottom: 14px; }
.ai-spinner { width: 16px; height: 16px; border: 2px solid rgba(61,126,245,0.3); border-top-color: var(--accent); border-radius: 50%; animation: spin 0.7s linear infinite; flex-shrink: 0; }
.ai-success { background: rgba(39,196,126,0.1); border: 1px solid rgba(39,196,126,0.25); border-radius: 8px; padding: 10px 14px; font-size: 13px; color: var(--green); margin-bottom: 14px; }

/* ── LOADING ─────────────────────────────────── */
.loading-overlay { position: absolute; inset: 0; background: rgba(7,8,13,0.75); display: flex; align-items: center; justify-content: center; gap: 12px; z-index: 10; font-size: 13px; color: var(--text2); }
.spinner { width: 20px; height: 20px; border: 2px solid var(--border2); border-top-color: var(--accent); border-radius: 50%; animation: spin 0.7s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ── TOAST ───────────────────────────────────── */
#toast { position: fixed; bottom: 20px; right: 20px; background: var(--surface); border: 1px solid var(--border2); border-radius: 10px; padding: 11px 16px; font-size: 13px; color: var(--text); transform: translateY(70px); opacity: 0; transition: all 0.22s; z-index: 200; max-width: 320px; }
#toast.show { transform: translateY(0); opacity: 1; }
#toast.success { border-color: var(--green); color: var(--green); }
#toast.error   { border-color: var(--red);   color: var(--red); }

/* ── TOUCH OPTIMISATIONS (55" screen) ───────── */
@media (pointer: coarse) {
  .btn { padding: 11px 16px; font-size: 14px; }
  .tool-btn { width: 44px; height: 44px; font-size: 18px; }
  .tool-btn.nav-btn { width: 50px; height: 50px; }
  .drawing-item { padding: 13px; }
  .drawing-thumb { width: 48px; height: 48px; }
  .disc-chip { padding: 10px 12px; font-size: 13px; }
}

/* ── MARKUP TOOLBAR ──────────────────────────── */
#markup-toolbar {
  display: flex; align-items: center; gap: 6px; padding: 6px 12px;
  background: var(--surface2); border-bottom: 1px solid var(--border);
  flex-shrink: 0; flex-wrap: wrap; overflow-x: auto;
}
.markup-tool-group { display: flex; align-items: center; gap: 4px; }
.markup-section-label { font-size: 10px; color: var(--text3); text-transform: uppercase; letter-spacing: 0.8px; margin-right: 2px; white-space: nowrap; }
.markup-btn {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 5px 10px; border-radius: 6px; border: 1px solid var(--border2);
  background: transparent; color: var(--text2); font-family: var(--font); font-size: 12px;
  cursor: pointer; transition: all 0.12s; white-space: nowrap;
}
.markup-btn:hover { background: var(--surface3); color: var(--text); }
.markup-btn.active { background: rgba(61,126,245,0.2); border-color: var(--accent); color: var(--accent); }
.markup-btn.active-green { background: rgba(39,196,126,0.15); border-color: var(--green); color: var(--green); }

.color-swatches { display: flex; align-items: center; gap: 4px; }
.color-swatch { width: 22px; height: 22px; border-radius: 50%; border: 2px solid transparent; cursor: pointer; transition: border-color 0.1s; flex-shrink: 0; }
.color-swatch:hover { border-color: white; transform: scale(1.15); }
.color-preview { width: 22px; height: 22px; border-radius: 50%; border: 2px solid var(--border2); flex-shrink: 0; }

/* ── LOGISTICS PANEL ─────────────────────────── */
#logistics-panel {
  background: var(--surface); border-bottom: 1px solid var(--border);
  flex-shrink: 0; max-height: 220px; overflow-y: auto;
}
.logistics-panel-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 8px 14px; border-bottom: 1px solid var(--border);
  font-size: 12px; color: var(--text2); position: sticky; top: 0;
  background: var(--surface); z-index: 1;
}
.symbol-library { display: flex; flex-wrap: nowrap; gap: 16px; padding: 10px 14px; overflow-x: auto; scrollbar-width: thin; }
.sym-category { flex-shrink: 0; }
.sym-cat-label { font-size: 10px; font-weight: 600; letter-spacing: 0.8px; text-transform: uppercase; color: var(--text3); margin-bottom: 6px; }
.sym-grid { display: flex; gap: 6px; }
.sym-btn {
  display: flex; flex-direction: column; align-items: center; gap: 3px;
  padding: 6px 8px; border-radius: 8px; border: 1px solid var(--border2);
  background: var(--surface2); cursor: pointer; transition: all 0.12s;
  min-width: 60px;
}
.sym-btn:hover { background: var(--surface3); border-color: var(--border2); transform: translateY(-1px); }
.sym-btn span { font-size: 10px; color: var(--text2); text-align: center; line-height: 1.2; }
.sym-preview { border-radius: 4px; }

/* Update main grid to accommodate markup toolbar */
#main { display: flex; flex-direction: column; overflow: hidden; min-height: 0; }

/* Touch targets for 55" screen */
@media (pointer: coarse) {
  .markup-btn { padding: 8px 14px; font-size: 13px; }
  .color-swatch { width: 28px; height: 28px; }
  .sym-btn { min-width: 70px; padding: 8px; }
}

/* ── BULK UPLOAD ─────────────────────────────── */
.bulk-file-row {
  display: flex; align-items: center; gap: 10px;
  padding: 9px 12px; border-bottom: 1px solid var(--border);
  transition: background 0.1s;
}
.bulk-file-row:last-child { border-bottom: none; }
.bulk-file-icon { font-size: 18px; flex-shrink: 0; }
.bulk-file-info { flex: 1; min-width: 0; }
.bulk-file-name { font-size: 13px; color: var(--text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.bulk-file-status { font-size: 11px; color: var(--text2); margin-top: 2px; }
.bulk-file-badge { font-size: 11px; font-family: var(--mono); color: var(--accent); flex-shrink: 0; }

.bulk-processing { background: rgba(61,126,245,0.06); }
.bulk-uploading  { background: rgba(240,160,32,0.06); }
.bulk-done       { background: rgba(39,196,126,0.06); }
.bulk-failed     { background: rgba(224,64,64,0.06); }

.bulk-processing .bulk-file-status { color: var(--accent); }
.bulk-uploading  .bulk-file-status { color: var(--amber); }
.bulk-done       .bulk-file-status { color: var(--green); }
.bulk-failed     .bulk-file-status { color: var(--red); }