/* RK-DB visual polish: premium piping blueprint background */
:root {
  --rk-bg: #f4f1ec;
  --rk-panel: rgba(255, 255, 255, 0.90);
  --rk-panel-strong: rgba(255, 255, 255, 0.97);
  --rk-line: #d8d0c6;
  --rk-ink: #201914;
  --rk-muted: #665d55;
  --rk-accent: #1f6558;
  --rk-accent-2: #8b5d2c;
  --rk-danger: #a83d3d;
  --rk-topbar: rgba(255, 255, 255, 0.92);
  --rk-shadow: 0 12px 34px rgba(42, 34, 25, .08);
}

* { box-sizing: border-box; }

body {
  background-color: var(--rk-bg) !important;
  background-image:
    linear-gradient(135deg, rgba(246, 241, 234, .86), rgba(236, 226, 214, .80)),
    url("/static/rk-blueprint-bg.webp?v=1");
  background-size: auto, cover;
  background-position: center top, center center;
  background-repeat: no-repeat, no-repeat;
  background-attachment: fixed, fixed;
  color: var(--rk-ink);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -1;
  background:
    linear-gradient(90deg, rgba(32,25,20,.035) 1px, transparent 1px),
    linear-gradient(0deg, rgba(32,25,20,.028) 1px, transparent 1px);
  background-size: 44px 44px;
}

main { position: relative; }

.rk-app {
  display: block;
  min-height: 100vh;
  padding: 0;
}

.rk-topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  min-height: 68px;
  padding: 10px clamp(16px, 3vw, 34px);
  background: var(--rk-topbar);
  border-bottom: 1px solid rgba(120, 102, 82, .20);
  box-shadow: 0 8px 22px rgba(42, 34, 25, .06);
  backdrop-filter: blur(12px);
}

.rk-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--rk-ink);
  text-decoration: none;
  min-width: max-content;
}

.rk-brand-mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: var(--rk-accent);
  color: #fff;
  font-weight: 800;
  letter-spacing: 0;
}

.rk-brand strong,
.rk-brand small {
  display: block;
  line-height: 1.05;
}

.rk-brand small {
  margin-top: 3px;
  color: var(--rk-muted);
  font-size: .78rem;
  font-weight: 600;
}

.rk-main-nav,
.rk-section-nav,
.rk-page-actions,
.toolbar,
.links {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.rk-main-nav {
  justify-content: flex-end;
}

.rk-nav-link,
.rk-section-link {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 8px 11px;
  border-radius: 10px;
  color: #4e463f;
  text-decoration: none;
  font-weight: 700;
  font-size: .92rem;
}

.rk-nav-link:hover,
.rk-section-link:hover {
  background: rgba(31, 101, 88, .08);
  color: var(--rk-accent);
  text-decoration: none;
}

.rk-nav-link.is-active {
  background: var(--rk-accent);
  color: #fff;
}

.rk-shell {
  width: min(100%, 1500px);
  margin: 0 auto;
  padding: 28px clamp(16px, 3vw, 34px) 52px;
}

.rk-shell-narrow {
  width: min(100%, 1120px);
}

.rk-page-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 18px;
  margin-bottom: 14px;
}

.rk-page-head h1 {
  margin: 0;
  font-size: clamp(1.65rem, 2.4vw, 2.25rem);
  letter-spacing: 0;
}

.rk-page-head p {
  margin: 7px 0 0;
  max-width: 760px;
  color: var(--rk-muted);
  line-height: 1.45;
}

.rk-eyebrow {
  margin-bottom: 5px;
  color: var(--rk-muted);
  font-size: .78rem;
  font-weight: 800;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.rk-section-nav {
  margin: 0 0 18px;
  padding: 8px;
  border: 1px solid rgba(120, 102, 82, .20);
  border-radius: 12px;
  background: rgba(255,255,255,.55);
}

.rk-section-link {
  min-height: 34px;
  padding: 7px 10px;
  border: 1px solid rgba(120, 102, 82, .18);
  background: rgba(255,255,255,.62);
}

h1 { letter-spacing: 0; text-shadow: 0 1px 0 rgba(255,255,255,.65); }
h2, h3 { letter-spacing: 0; }

.panel, .card, .tiff-sheet {
  background: var(--rk-panel) !important;
  border-color: rgba(120, 102, 82, .28) !important;
  border-radius: 10px !important;
  box-shadow: var(--rk-shadow), inset 0 1px 0 rgba(255,255,255,.72) !important;
  backdrop-filter: blur(5px);
}

.panel:hover, .card:hover { border-color: rgba(33, 94, 82, .32) !important; }

.button, button, a.button {
  border-radius: 10px !important;
  box-shadow: 0 5px 14px rgba(33, 94, 82, .08);
  transition: transform .12s ease, box-shadow .12s ease, background-color .12s ease;
}
.button:hover, button:hover, a.button:hover { transform: translateY(-1px); box-shadow: 0 8px 18px rgba(33, 94, 82, .13); text-decoration: none; }
.button.secondary, a.button.secondary, button.secondary {
  background: rgba(255,255,255,.62) !important;
  color: var(--rk-accent) !important;
}
.button:not(.secondary), a.button:not(.secondary), button:not(.secondary):not(.linkish):not(.danger) {
  background: var(--rk-accent) !important;
  border-color: var(--rk-accent) !important;
  color: #fff !important;
}

input, select, textarea { background: rgba(255,255,255,.78) !important; border-color: rgba(120, 102, 82, .34) !important; }
input:focus, select:focus, textarea:focus { outline: 3px solid rgba(33, 94, 82, .14); border-color: rgba(33, 94, 82, .48) !important; }

table { background: var(--rk-panel-strong); border-radius: 14px; overflow: hidden; }
th { background: rgba(245, 241, 235, .96) !important; color: #594c43 !important; }
td { background: rgba(255, 253, 248, .54); }
tr:hover td { background: rgba(233, 244, 241, .42); }
.badge { box-shadow: inset 0 1px 0 rgba(255,255,255,.55); }
.jump-links a { box-shadow: 0 8px 18px rgba(48, 33, 20, .06); }
.muted { color: var(--rk-muted) !important; }

.actions,
.rk-action-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 12px;
}

.action,
.rk-action {
  display: block;
  min-height: 116px;
  padding: 16px;
  border: 1px solid rgba(120, 102, 82, .24);
  border-radius: 10px;
  background: rgba(255,255,255,.72);
  color: inherit;
  text-decoration: none;
  box-shadow: var(--rk-shadow);
}

.action h3,
.rk-action h3 {
  margin: 0 0 7px;
  font-size: 1.02rem;
}

.action p,
.rk-action p {
  margin: 0;
  color: var(--rk-muted);
  line-height: 1.42;
}

@media (max-width: 820px) {
  body { background-size: auto, auto 100%; }
  .panel, .card, .tiff-sheet { backdrop-filter: none; }
  .rk-topbar {
    position: static;
    align-items: flex-start;
    flex-direction: column;
  }
  .rk-main-nav {
    justify-content: flex-start;
    width: 100%;
  }
  .rk-page-head {
    align-items: flex-start;
    flex-direction: column;
  }
  .rk-page-actions {
    width: 100%;
  }
  .rk-nav-link,
  .rk-section-link {
    font-size: .88rem;
  }
}