*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.5;
  color: var(--text);
  background: var(--bg);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 { margin: 0 0 var(--sp-2); font-weight: 600; line-height: 1.25; }
h1 { font-size: 22px; }
h2 { font-size: 18px; }
h3 { font-size: 16px; }
p { margin: 0 0 var(--sp-3); }
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
button { font-family: inherit; }
img, svg { max-width: 100%; display: block; }

/* ---------- App shell ---------- */
.app-shell {
  min-height: 100vh;
  min-height: 100dvh;
  display: grid;
  grid-template-columns: 1fr;
  grid-template-rows: var(--topbar-h) 1fr;
  grid-template-areas:
    "topbar"
    "page";
}
.topbar { grid-area: topbar; }
.page {
  grid-area: page;
  padding: var(--sp-4);
}

/* ---------- Topbar ---------- */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-2);
  padding: 0 var(--sp-3);
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  height: var(--topbar-h);
  position: sticky;
  top: 0;
  z-index: 90;
}
.topbar-left {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  min-width: 0;
}
.topbar-title {
  font-size: 16px;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.topbar-actions { display: flex; align-items: center; gap: var(--sp-2); }

.hamburger-btn {
  width: 44px;
  height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  padding: 0;
}
.hamburger-btn:hover { background: var(--surface-2); }

/* ---------- Sidebar (drawer on mobile) ---------- */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: var(--drawer-w);
  background: var(--sidebar-bg);
  color: var(--sidebar-text);
  z-index: 200;
  transform: translateX(-100%);
  transition: transform .22s ease;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  padding: var(--sp-4) var(--sp-3) var(--sp-5);
}
body.drawer-open .sidebar { transform: translateX(0); }

.drawer-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15,23,42,.55);
  z-index: 150;
  opacity: 0;
  pointer-events: none;
  transition: opacity .22s ease;
}
body.drawer-open .drawer-backdrop {
  opacity: 1;
  pointer-events: auto;
}

/* Sidebar: brand row */
.sidebar-brand {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-2);
  padding: 0 var(--sp-2) var(--sp-4);
}
.sidebar-brand-left {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  text-decoration: none;
  color: var(--sidebar-text-active);
  font-weight: 700;
  font-size: 18px;
}
.sidebar-brand-left:hover { text-decoration: none; }
.sidebar-logo {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--primary);
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 18px;
  flex-shrink: 0;
}
.sidebar-close {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: transparent;
  border: none;
  color: var(--sidebar-text);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0;
}
.sidebar-close:hover { background: var(--sidebar-hover); color: var(--sidebar-text-active); }

/* Sidebar: business block */
.sidebar-biz {
  padding: var(--sp-2) var(--sp-2) var(--sp-4);
  border-bottom: 1px solid var(--sidebar-border);
  margin-bottom: var(--sp-3);
}
.sidebar-biz-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--sidebar-label);
  margin-bottom: 4px;
}
.sidebar-biz-name {
  font-size: 16px;
  font-weight: 600;
  color: var(--sidebar-text-active);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Sidebar: nav */
.navlist {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.navlink {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  color: var(--sidebar-text);
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
  border: none;
  background: transparent;
  width: 100%;
  text-align: left;
  min-height: 44px;
  font-family: inherit;
}
.navlink:hover { background: var(--sidebar-hover); color: var(--sidebar-text-active); text-decoration: none; }
.navlink.active { background: var(--sidebar-active); color: #fff; }
.navlink.active:hover { background: var(--primary-dark); color: #fff; }
.navlink svg { flex-shrink: 0; }

/* ---------- Desktop: permanent sidebar ---------- */
@media (min-width: 900px) {
  .app-shell {
    grid-template-columns: var(--sidebar-w) 1fr;
    grid-template-rows: var(--topbar-h) 1fr;
    grid-template-areas:
      "sidebar topbar"
      "sidebar page";
  }
  .sidebar {
    grid-area: sidebar;
    position: sticky;
    top: 0;
    height: 100vh;
    transform: none;
    width: auto;
  }
  body.drawer-open .sidebar { transform: none; }
  .hamburger-btn { display: none; }
  .drawer-backdrop { display: none; }
  .sidebar-close { display: none; }
  .page { padding: var(--sp-5); }
}

/* ---------- Utility ---------- */
.container { max-width: 1200px; margin: 0 auto; }
.muted { color: var(--text-muted); }
.center { text-align: center; }
.hidden { display: none !important; }
.row { display: flex; gap: var(--sp-3); align-items: center; }
.row-between {
  display: flex;
  gap: var(--sp-3);
  align-items: center;
  justify-content: space-between;
}
.col { display: flex; flex-direction: column; gap: var(--sp-3); }
.grid-2 { display: grid; gap: var(--sp-3); grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }