/* ── Reset & shell ─────────────────────────────────────────────────────── */

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

/* Class-level `display` beats the UA `[hidden]` rule, which would leave
   full-screen overlays invisible but still swallowing clicks. */
[hidden] { display: none !important; }

html, body { height: 100%; }

body {
  margin: 0;
  font-family: var(--font-ui);
  font-size: 13px;
  line-height: 1.5;
  color: var(--text);
  background: var(--bg-app);
  -webkit-font-smoothing: antialiased;
  overflow: hidden;
}

h1, h2, h3, h4, p { margin: 0; }
button { font: inherit; color: inherit; }
svg { display: block; }

/* Icon defaults — every inline icon is a 1.5px stroked line icon. */
button svg, .search-field svg, .dz-icon, .select-wrap svg, .stage-tip svg, .size-badge svg, .empty-state svg {
  width: 16px; height: 16px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex: none;
}

::selection { background: var(--accent-soft); }

/* Scrollbars */
* { scrollbar-width: thin; scrollbar-color: var(--line-strong) transparent; }
*::-webkit-scrollbar { width: 10px; height: 10px; }
*::-webkit-scrollbar-track { background: transparent; }
*::-webkit-scrollbar-thumb { background: var(--line-strong); border-radius: var(--r-full); border: 3px solid transparent; background-clip: content-box; }
*::-webkit-scrollbar-thumb:hover { background: var(--text-3); background-clip: content-box; }

/* ── Header ────────────────────────────────────────────────────────────── */

.app-header {
  height: var(--header-h);
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: var(--sp-4);
  padding: 0 var(--sp-5);
  background: var(--bg-panel);
  border-bottom: 1px solid var(--line);
  position: relative;
  z-index: 30;
}

.brand { display: flex; align-items: center; gap: var(--sp-3); min-width: 0; }

.brand-mark {
  width: 38px; height: 38px;
  border-radius: 10px;
  background: linear-gradient(150deg, var(--accent), #7C4DFF);
  display: grid; place-items: center;
  box-shadow: 0 4px 14px rgba(47, 107, 255, .35);
  flex: none;
}
.brand-mark svg { width: 24px; height: 24px; fill: none; stroke: #fff; stroke-width: 1.4; stroke-linejoin: round; }

.brand-text h1 { font-size: 15px; font-weight: 650; letter-spacing: -.01em; line-height: 1.2; }
.brand-text p { font-size: 11px; color: var(--text-3); line-height: 1.3; }

.main-nav { display: flex; align-items: center; gap: 4px; }

.nav-item {
  position: relative;
  background: none; border: 0;
  padding: 26px var(--sp-4) 25px;
  font-size: 13px; font-weight: 500;
  color: var(--text-2);
  cursor: pointer;
  white-space: nowrap;
  transition: color var(--dur) var(--ease);
}
.nav-item:hover { color: var(--text); }
.nav-item.is-active { color: var(--accent); font-weight: 600; }
.nav-item.is-active::after {
  content: ""; position: absolute; left: var(--sp-3); right: var(--sp-3); bottom: 0;
  height: 2px; border-radius: 2px 2px 0 0; background: var(--accent);
}

.header-actions { display: flex; align-items: center; justify-content: flex-end; gap: var(--sp-2); }
.btn-group { display: flex; gap: 2px; padding: 2px; background: var(--bg-input); border: 1px solid var(--line); border-radius: var(--r-md); }
.btn-group .icon-btn { border: 0; background: none; }

.avatar {
  width: 34px; height: 34px; flex: none;
  border-radius: 50%;
  border: 1px solid var(--line-strong);
  background: var(--bg-input);
  color: var(--text-2);
  font-size: 12px; font-weight: 650;
  cursor: pointer;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}
.avatar:hover { background: var(--bg-hover); color: var(--text); }

/* ── Views ─────────────────────────────────────────────────────────────── */

.view { display: none; height: calc(100vh - var(--header-h)); }
.view.is-active { display: grid; }

.app-main {
  grid-template-columns: var(--panel-l) minmax(0, 1fr) var(--panel-r);
  gap: 0;
  padding: var(--sp-4);
  gap: var(--sp-4);
  background: var(--bg-app);
}
body.assets-collapsed .app-main { grid-template-columns: 64px minmax(0, 1fr) var(--panel-r); }

.view-page { display: none; }
.view-page.is-active { display: block; overflow-y: auto; padding: var(--sp-6) var(--sp-6) 64px; }

/* ── Panels ────────────────────────────────────────────────────────────── */

.panel {
  display: flex; flex-direction: column;
  min-height: 0;
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
}

.panel-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: var(--sp-4) var(--sp-4) var(--sp-3);
  flex: none;
}
.panel-head h2 { font-size: 13px; font-weight: 650; display: flex; align-items: center; gap: var(--sp-2); }

.panel-body { flex: 1 1 auto; min-height: 0; overflow-y: auto; padding: 0 var(--sp-4) var(--sp-4); }
.panel-right .panel-body { padding: var(--sp-4); display: flex; flex-direction: column; gap: var(--sp-4); }
/* Without this the first card is squeezed by the flex parent and its
   last few rows get clipped instead of scrolling. */
.panel-right .panel-body > .card { flex: none; }

.panel-foot { flex: none; padding: var(--sp-3) var(--sp-4) var(--sp-4); border-top: 1px solid var(--line-soft); }

/* Collapsed assets rail */
body.assets-collapsed .panel-left .panel-body,
body.assets-collapsed .panel-left .panel-foot,
body.assets-collapsed .panel-left .panel-head h2 { display: none; }
body.assets-collapsed .panel-left .panel-head { justify-content: center; padding: var(--sp-4) 0 var(--sp-2); }
/* Rail tooltips sit outside the panel, so it must stop clipping once collapsed. */
body.assets-collapsed .panel-left { overflow: visible; }

/* ── Stage ─────────────────────────────────────────────────────────────── */

.stage {
  display: flex; flex-direction: column;
  min-width: 0; min-height: 0;
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
}

.stage-toolbar {
  flex: none;
  display: flex; align-items: center; gap: var(--sp-3);
  padding: var(--sp-3) var(--sp-4);
  border-bottom: 1px solid var(--line);
  flex-wrap: wrap;
}
.toolbar-label { font-size: 12px; font-weight: 600; color: var(--text-2); }
.stage-toolbar #btn-fullscreen { margin-left: auto; }

.stage-canvas {
  position: relative;
  flex: 1 1 auto; min-height: 0;
  overflow: auto;
  /* Flex + margin:auto keeps the artboard centred without clipping its top-left
     corner once the zoom pushes it past the viewport. */
  display: flex;
  padding: var(--sp-5);
  background:
    conic-gradient(from 90deg at 1px 1px, transparent 25%, var(--line-soft) 0) 0 0 / 22px 22px,
    var(--bg-sunken);
}

.canvas-frame {
  position: relative;
  flex: none;
  margin: auto;
  border-radius: var(--r-md);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}
.canvas-frame svg { display: block; width: 100%; height: 100%; }

.guide-overlay { position: absolute; inset: 0; pointer-events: none; }

/* Mockup previews: lighting and texture layered over the live pattern, so the
   pattern itself is never altered — only how it is presented. */
.canvas-frame[data-mockup]::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
}
.canvas-frame[data-mockup="-wall"]::after {
  background:
    linear-gradient(to bottom, rgba(255, 255, 255, .16), transparent 42%),
    radial-gradient(120% 85% at 50% 0%, transparent 40%, rgba(0, 0, 0, .42) 100%);
}
.canvas-frame[data-mockup="-wall"]::before {
  content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 16%;
  background: linear-gradient(to bottom, rgba(0, 0, 0, .3), rgba(0, 0, 0, .12));
  border-top: 1px solid rgba(0, 0, 0, .35);
  pointer-events: none; z-index: 1;
}
.canvas-frame[data-mockup="-fabric"]::after {
  background:
    repeating-linear-gradient(90deg, rgba(0, 0, 0, .07) 0 1px, transparent 1px 3px),
    repeating-linear-gradient(0deg, rgba(255, 255, 255, .05) 0 1px, transparent 1px 3px),
    linear-gradient(105deg, rgba(0,0,0,.24) 0%, transparent 18%, rgba(255,255,255,.12) 34%,
                    transparent 52%, rgba(0,0,0,.22) 68%, transparent 86%, rgba(255,255,255,.08) 100%);
  mix-blend-mode: soft-light;
}

.size-badge {
  position: absolute; left: var(--sp-5); bottom: var(--sp-5);
  display: flex; align-items: center; gap: 6px;
  padding: 6px 10px;
  font-size: 11px; font-weight: 550; color: var(--text-2);
  background: color-mix(in srgb, var(--bg-panel) 88%, transparent);
  backdrop-filter: blur(8px);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  pointer-events: none;
}

.stage-tip {
  flex: none;
  display: flex; align-items: center; gap: var(--sp-2);
  padding: var(--sp-3) var(--sp-4);
  font-size: 12px; color: var(--text-2);
  border-top: 1px solid var(--line);
}
.stage-tip svg { color: var(--accent); fill: var(--accent); stroke: none; width: 15px; height: 15px; }

/* Fullscreen preview */
body.preview-full .app-main { grid-template-columns: 0 minmax(0, 1fr) 0; gap: 0; }
body.preview-full .panel { display: none; }

/* ── Pages ─────────────────────────────────────────────────────────────── */

.page-head {
  display: flex; align-items: flex-end; justify-content: space-between;
  gap: var(--sp-4); flex-wrap: wrap;
  max-width: 1280px; margin: 0 auto var(--sp-6);
}
.page-head h2 { font-size: 22px; font-weight: 650; letter-spacing: -.02em; }
.page-head .muted { color: var(--text-2); margin-top: 4px; max-width: 62ch; }
.page-head-actions { display: flex; align-items: center; gap: var(--sp-2); }

.pattern-grid {
  max-width: 1280px; margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  gap: var(--sp-4);
}

.doc-layout {
  max-width: 1280px; margin: 0 auto;
  display: grid; grid-template-columns: 200px minmax(0, 1fr);
  gap: var(--sp-6); align-items: start;
}
.doc-nav { position: sticky; top: 0; display: flex; flex-direction: column; gap: 2px; }
.doc-nav a {
  padding: 7px 10px; border-radius: var(--r-sm);
  color: var(--text-2); text-decoration: none; font-size: 12.5px;
}
.doc-nav a:hover { background: var(--bg-hover); color: var(--text); }

.doc-body { max-width: 78ch; }
.doc-body section { margin-bottom: var(--sp-6); scroll-margin-top: var(--sp-4); }
.doc-body h3 { font-size: 16px; font-weight: 650; margin-bottom: var(--sp-2); }
.doc-body h4 { font-size: 13px; font-weight: 650; margin: var(--sp-4) 0 var(--sp-1); }
.doc-body p, .doc-body li { color: var(--text-2); font-size: 13px; line-height: 1.7; }
.doc-body ul { margin: var(--sp-2) 0; padding-left: 18px; }
.doc-body li { margin-bottom: 4px; }
.doc-body strong { color: var(--text); font-weight: 600; }
.doc-body code {
  font-family: var(--font-mono); font-size: 11.5px;
  background: var(--bg-input); border: 1px solid var(--line);
  padding: 1px 5px; border-radius: 4px; color: var(--text);
}
.doc-body kbd {
  font-family: var(--font-ui); font-size: 11px; font-weight: 600;
  background: var(--bg-input); border: 1px solid var(--line-strong);
  border-bottom-width: 2px; padding: 2px 6px; border-radius: 5px;
}

/* ── Responsive ────────────────────────────────────────────────────────── */

@media (max-width: 1280px) {
  :root { --panel-l: 280px; --panel-r: 340px; }
}

@media (max-width: 1080px) {
  body { overflow: auto; }
  .app-header { grid-template-columns: auto 1fr; row-gap: 0; height: auto; padding: var(--sp-3) var(--sp-4); }
  .main-nav { order: 3; grid-column: 1 / -1; overflow-x: auto; border-top: 1px solid var(--line-soft); }
  .nav-item { padding: 12px var(--sp-3); }
  .view, .view.is-active { height: auto; }
  .app-main { grid-template-columns: 1fr; }
  .panel-left, .panel-right { max-height: none; }
  .stage-canvas { min-height: 60vh; }
  .doc-layout { grid-template-columns: 1fr; }
  .doc-nav { position: static; flex-direction: row; flex-wrap: wrap; }
}

@media (max-width: 640px) {
  .brand-text { display: none; }
  #btn-export span, .header-actions .btn-group { display: none; }
  .view-page.is-active { padding: var(--sp-4) var(--sp-4) 48px; }
}