* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* ---- Top bar: persistent branded chrome, borrowed from the client
   dashboard demo / proposals tool's navy gradient header ---- */
.app-topbar {
  height: var(--topbar-height);
  flex: none;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 0 20px;
  background: linear-gradient(135deg, var(--color-header-gradient-start) 0%, var(--color-header-gradient-end) 100%);
  color: #ffffff;
  position: sticky;
  top: 0;
  z-index: 20;
}
.app-topbar-brand { font-weight: 700; letter-spacing: 0.01em; }
.app-topbar .hamburger-btn { display: none; }

.app-body {
  flex: 1;
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr;
  min-height: 0;
}

/* ---- Sidebar ---- */
.app-sidebar {
  background: var(--color-surface-sunken);
  border-right: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  padding: 16px;
  gap: 8px;
  position: sticky;
  top: var(--topbar-height);
  height: calc(100vh - var(--topbar-height));
  overflow-y: auto;
}
.app-sidebar-nav { display: flex; flex-direction: column; gap: 2px; flex: 1; }
.nav-section { display: flex; flex-direction: column; }
.nav-link {
  color: var(--color-text-muted);
  text-decoration: none;
  padding: 11px 18px;
  border-radius: var(--radius);
  font-weight: 500;
}
.nav-link-active {
  color: #ffffff;
  background: linear-gradient(135deg, var(--color-nav-active-start) 0%, var(--color-nav-active-mid) 50%, var(--color-nav-active-start) 100%);
  box-shadow: var(--shadow-nav-active);
  font-weight: 600;
}
.nav-subitems {
  display: flex;
  flex-direction: column;
  margin: 2px 0 4px 14px;
  border-left: 1px solid var(--color-border);
  padding-left: 10px;
}
.nav-sublink {
  color: var(--color-text-muted);
  text-decoration: none;
  padding: 8px 14px;
  border-radius: var(--radius);
  font-size: 0.88rem;
}
.nav-sublink.nav-link-active {
  color: #ffffff;
  font-weight: 600;
  background: linear-gradient(135deg, var(--color-nav-active-start) 0%, var(--color-nav-active-mid) 50%, var(--color-nav-active-start) 100%);
  box-shadow: var(--shadow-nav-active);
}

.app-sidebar-footer {
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: 8px;
  border-top: 1px solid var(--color-border);
  padding-top: 12px;
}

.theme-toggle {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 8px 10px;
  cursor: pointer;
  color: var(--color-text-muted);
  font: inherit;
  width: 100%;
}
.theme-toggle-icon-dark { display: none; }
:root[data-theme='dark'] .theme-toggle-icon-light { display: none; }
:root[data-theme='dark'] .theme-toggle-icon-dark { display: inline; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) .theme-toggle-icon-light { display: none; }
  :root:not([data-theme]) .theme-toggle-icon-dark { display: inline; }
}

.app-sidebar-logout button {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 8px 10px;
  cursor: pointer;
  color: var(--color-text-muted);
  width: 100%;
  font: inherit;
}

.data-freshness {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  padding: 0 10px;
  line-height: 1.4;
}
.refresh-form { width: 100%; }
.refresh-form button {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 8px 10px;
  cursor: pointer;
  color: var(--color-text-muted);
  width: 100%;
  font: inherit;
}

.app-sidebar-backdrop { display: none; }
.app-main { padding: 24px; min-width: 0; }

@media (max-width: 900px) {
  .app-body { display: block; }
  .app-topbar .hamburger-btn { display: flex; }
  .app-sidebar {
    position: fixed;
    top: var(--topbar-height);
    left: 0;
    height: calc(100vh - var(--topbar-height));
    width: var(--sidebar-width);
    z-index: var(--z-drawer);
    transform: translateX(-100%);
    transition: transform 0.2s ease;
    box-shadow: 2px 0 12px rgba(0, 0, 0, 0.15);
  }
  body.sidebar-open .app-sidebar { transform: translateX(0); }
  .app-sidebar-backdrop {
    display: block;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    z-index: var(--z-backdrop);
    border: none;
    padding: 0;
    cursor: pointer;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease;
  }
  body.sidebar-open .app-sidebar-backdrop { opacity: 1; pointer-events: auto; }
  .hamburger-btn {
    background: none;
    border: 1px solid rgba(255, 255, 255, 0.4);
    border-radius: var(--radius);
    width: 36px;
    height: 36px;
    align-items: center;
    justify-content: center;
    gap: 4px;
    cursor: pointer;
    padding: 0;
    flex-direction: column;
  }
  .hamburger-btn span { display: block; width: 18px; height: 2px; background: #ffffff; }
}

.login-body {
  display: flex; align-items: center; justify-content: center;
  min-height: 100vh; margin: 0; font-family: var(--font-sans); background: var(--color-bg);
}
.login-card {
  background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius);
  padding: 32px; width: 320px; box-shadow: var(--shadow-card);
}
.login-card h1 { font-size: 1.25rem; margin: 0 0 4px; }
.login-subtitle { color: var(--color-text-muted); margin: 0 0 20px; font-size: 0.9rem; }
.login-error { color: var(--color-critical-text); font-size: 0.9rem; }
.login-form { display: flex; flex-direction: column; gap: 8px; }
.login-form label { font-size: 0.85rem; color: var(--color-text-muted); }
.login-form input {
  padding: 8px 10px; border: 1px solid var(--color-border); border-radius: var(--radius); font-size: 1rem;
}
.login-form button {
  margin-top: 8px; padding: 10px; border: none; border-radius: var(--radius);
  background: linear-gradient(135deg, var(--color-header-gradient-start) 0%, var(--color-header-gradient-end) 100%);
  color: white; font-weight: 600; cursor: pointer;
}

h1.page-title { font-size: 1.4rem; margin: 0 0 4px; }
p.page-subtitle { color: var(--color-text-muted); margin: 0 0 20px; }
section.page-section { margin: 32px 0; }
section.page-section h2 { font-size: 1.1rem; margin: 0 0 12px; }

@media (max-width: 600px) {
  .app-main { padding: 16px; }
  h1.page-title { font-size: 1.2rem; }
}