:root {
  --ink: #111111;
  --coffee: #2b1712;
  --espresso: #15100f;
  --cream: #fff1d6;
  --paper: #fff8e8;
  --sand: #e7c98c;
  --caramel: #d9862f;
  --tangerine: #ff9b3d;
  --mint: #88d498;
  --blue: #6ec6ff;
  --rose: #ff6b6b;
  --muted: #6f5e52;
  --border: 3px solid var(--ink);
  --shadow: 8px 8px 0 var(--ink);
  --shadow-small: 4px 4px 0 var(--ink);
  --radius: 18px;
  --safe-bottom: env(safe-area-inset-bottom, 0px);
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: ui-rounded, "SF Pro Rounded", "Avenir Next", Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  overflow-x: hidden;
  background:
    radial-gradient(circle at 12% 10%, rgba(255,155,61,.45), transparent 24%),
    radial-gradient(circle at 90% 18%, rgba(110,198,255,.35), transparent 25%),
    linear-gradient(135deg, #f7d47b 0%, #ffe8b7 35%, #f1b366 100%);
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: .22;
  background-image:
    linear-gradient(rgba(17,17,17,.18) 2px, transparent 2px),
    linear-gradient(90deg, rgba(17,17,17,.18) 2px, transparent 2px);
  background-size: 42px 42px;
  mask-image: radial-gradient(circle at top, black, transparent 78%);
}

button, input, select { font: inherit; }
button, select, label, .import-label { -webkit-tap-highlight-color: transparent; }
button { cursor: pointer; touch-action: manipulation; }

.app-shell {
  width: min(1220px, 100%);
  margin: 0 auto;
  min-height: 100vh;
  display: grid;
  grid-template-columns: 285px minmax(0, 1fr);
  gap: 22px;
  padding: 22px;
  position: relative;
  z-index: 1;
}

.sidebar {
  position: sticky;
  top: 22px;
  height: calc(100vh - 44px);
  border: var(--border);
  box-shadow: var(--shadow);
  border-radius: 24px;
  padding: 18px;
  background: var(--coffee);
  color: var(--cream);
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.brand-card {
  display: flex;
  align-items: center;
  gap: 13px;
  padding: 14px;
  background: var(--cream);
  color: var(--ink);
  border: var(--border);
  box-shadow: var(--shadow-small);
  border-radius: 20px;
  transform: rotate(-1deg);
}
.brand-mark {
  width: 54px;
  height: 54px;
  display: grid;
  place-items: center;
  border: var(--border);
  border-radius: 15px;
  background: var(--tangerine);
  font-size: 30px;
  font-weight: 1000;
  box-shadow: 3px 3px 0 var(--ink);
}
.eyebrow {
  margin: 0 0 4px;
  font-size: .72rem;
  letter-spacing: .14em;
  font-weight: 1000;
  text-transform: uppercase;
}
h1, h2, h3 { margin: 0; line-height: .98; letter-spacing: -.045em; }
h1 { font-size: clamp(1.55rem, 2vw, 2.1rem); }
h2 { font-size: clamp(2.15rem, 5vw, 4.5rem); }
h3 { font-size: clamp(1.25rem, 2.5vw, 2.05rem); }

.nav-tabs { display: grid; gap: 12px; }
.nav-btn, .ghost-btn, .primary-btn, .danger-btn, .mini-btn, .table-btn {
  border: var(--border);
  color: var(--ink);
  background: var(--paper);
  box-shadow: var(--shadow-small);
  border-radius: 14px;
  font-weight: 1000;
  transition: transform .12s ease, box-shadow .12s ease, background .12s ease;
}
.nav-btn { width: 100%; padding: 14px 14px; text-align: left; }
.nav-btn.active { background: var(--mint); transform: translate(2px, 2px); box-shadow: 2px 2px 0 var(--ink); }
.nav-btn:active, .ghost-btn:active, .primary-btn:active, .danger-btn:active, .mini-btn:active, .table-btn:active {
  transform: translate(3px, 3px);
  box-shadow: 1px 1px 0 var(--ink);
}
.side-note {
  margin-top: auto;
  padding: 15px;
  border: var(--border);
  border-radius: 18px;
  background: var(--sand);
  color: var(--ink);
  box-shadow: var(--shadow-small);
}
.side-note p { margin: 0 0 8px; font-size: 1.1rem; font-weight: 1000; }
.side-note span { display: block; color: #3f3028; line-height: 1.45; font-weight: 750; }

.main-content { display: grid; gap: 22px; min-width: 0; }
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 18px;
  padding: 20px;
  border: var(--border);
  border-radius: 26px;
  background: var(--paper);
  box-shadow: var(--shadow);
}
.top-actions { display: flex; flex-wrap: wrap; gap: 10px; justify-content: flex-end; align-items: center; }
.language-control {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 12px;
  border: var(--border);
  border-radius: 14px;
  background: var(--cream);
  box-shadow: var(--shadow-small);
  font-weight: 950;
}
select, input {
  width: 100%;
  border: var(--border);
  border-radius: 13px;
  background: #fffdf3;
  color: var(--ink);
  padding: 12px 13px;
  outline: none;
  box-shadow: 3px 3px 0 rgba(17,17,17,.96);
  font-weight: 800;
}
select:focus, input:focus { background: #fff; outline: 3px solid var(--blue); }
.language-control select { width: auto; padding: 7px 30px 7px 10px; box-shadow: none; border-width: 2px; }
.ghost-btn, .import-label { padding: 11px 13px; display: inline-flex; align-items: center; justify-content: center; background: var(--cream); }
.primary-btn { padding: 13px 16px; background: var(--tangerine); }
.danger-btn { padding: 11px 13px; background: var(--rose); }
.mini-btn { padding: 9px 12px; background: var(--blue); }
.table-btn { padding: 8px 10px; background: var(--mint); font-size: .86rem; }
.table-btn.delete { background: var(--rose); }

.sync-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 12px;
  border: var(--border);
  border-radius: 999px;
  background: var(--mint);
  font-size: .82rem;
  font-weight: 1000;
  box-shadow: var(--shadow-small);
}
.sync-pill::before { content: ""; width: 10px; height: 10px; border: 2px solid var(--ink); border-radius: 99px; background: #24bf62; }
.sync-pill.offline { background: var(--sand); }
.sync-pill.error { background: var(--rose); }
.sync-pill.offline::before, .sync-pill.error::before { background: var(--rose); }

.view { display: none; }
.active-view { display: grid; gap: 22px; }
.metric-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; }
.metric-card, .panel, .form-panel {
  border: var(--border);
  border-radius: 22px;
  background: var(--paper);
  box-shadow: var(--shadow);
}
.metric-card { padding: 18px; min-height: 155px; display: flex; flex-direction: column; justify-content: space-between; }
.metric-card:nth-child(2) { background: var(--mint); }
.metric-card:nth-child(3) { background: var(--blue); }
.metric-card:nth-child(4) { background: var(--sand); }
.highlight-card { background: var(--tangerine); transform: rotate(-.6deg); }
.metric-card span { font-weight: 1000; text-transform: uppercase; letter-spacing: .06em; font-size: .8rem; }
.metric-card strong { display: block; font-size: clamp(2rem, 4vw, 3.2rem); letter-spacing: -.06em; line-height: .95; }
.metric-card small { color: #3f3028; font-weight: 800; line-height: 1.3; }
.panel-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.panel, .form-panel { padding: 18px; }
.full-panel { min-width: 0; }
.panel-header { display: flex; justify-content: space-between; align-items: flex-start; gap: 14px; margin-bottom: 16px; }
.panel-caption { margin: 8px 0 0; color: var(--muted); font-weight: 800; }
.data-form { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 15px; }
.data-form label { display: grid; gap: 8px; font-weight: 1000; }
.data-form button[type="submit"] { grid-column: 1 / -1; }
.hidden { display: none !important; }

.table-wrap { overflow: auto; border: var(--border); border-radius: 16px; background: #fffdf3; box-shadow: inset 0 0 0 2px rgba(17,17,17,.04); }
table { width: 100%; border-collapse: collapse; min-width: 720px; }
th, td { padding: 13px 12px; text-align: left; border-bottom: 2px solid rgba(17,17,17,.18); vertical-align: top; }
th { background: var(--coffee); color: var(--cream); font-size: .76rem; text-transform: uppercase; letter-spacing: .08em; position: sticky; top: 0; z-index: 1; }
tr:last-child td { border-bottom: 0; }
td { font-weight: 780; }
.action-row { display: flex; gap: 8px; flex-wrap: wrap; }
.empty-row { text-align: center; color: var(--muted); font-weight: 1000; padding: 30px !important; }
.negative-stock { color: #b31414; }
.search-input { min-width: min(330px, 100%); }

.toast {
  position: fixed;
  left: 50%;
  bottom: calc(18px + var(--safe-bottom));
  transform: translate(-50%, 20px);
  opacity: 0;
  pointer-events: none;
  background: var(--ink);
  color: var(--cream);
  padding: 12px 16px;
  border: 3px solid var(--cream);
  box-shadow: 6px 6px 0 rgba(0,0,0,.35);
  border-radius: 14px;
  font-weight: 1000;
  z-index: 40;
  transition: opacity .18s ease, transform .18s ease;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

.auth-overlay {
  position: fixed;
  inset: 0;
  z-index: 80;
  display: none;
  place-items: center;
  padding: 22px;
  background: rgba(21,16,15,.72);
  backdrop-filter: blur(10px);
}
.auth-overlay.show { display: grid; }
.auth-card {
  width: min(440px, 100%);
  padding: 24px;
  border: var(--border);
  border-radius: 24px;
  background: var(--paper);
  box-shadow: 12px 12px 0 var(--ink);
}
.auth-card p { color: var(--muted); font-weight: 850; line-height: 1.45; }
.auth-form { display: grid; gap: 14px; }
.auth-error { min-height: 1.2em; color: #b31414; font-weight: 1000; }

@media (max-width: 980px) {
  .app-shell { grid-template-columns: 1fr; padding: 14px; }
  .sidebar { position: relative; top: 0; height: auto; }
  .nav-tabs { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .nav-btn { text-align: center; padding: 12px 8px; }
  .side-note { display: none; }
  .topbar { flex-direction: column; }
  .top-actions { justify-content: flex-start; width: 100%; }
  .metric-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .panel-grid { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .app-shell { padding: 10px; gap: 14px; }
  .sidebar, .topbar, .metric-card, .panel, .form-panel { border-width: 2.5px; box-shadow: 5px 5px 0 var(--ink); }
  .brand-card { transform: none; }
  .top-actions { display: grid; grid-template-columns: 1fr 1fr; }
  .language-control, .sync-pill { grid-column: 1 / -1; justify-content: space-between; }
  .ghost-btn, .import-label { width: 100%; }
  .metric-grid { grid-template-columns: 1fr; }
  .metric-card { min-height: 132px; }
  .data-form { grid-template-columns: 1fr; }
  .panel-header, .responsive-panel-header { flex-direction: column; align-items: stretch; }
  .search-input { width: 100%; min-width: 0; }
  h2 { font-size: 2.5rem; }
  table { min-width: 680px; }
}

.owner-login-panel {
  display: grid;
  grid-template-columns: minmax(160px, 1fr) minmax(120px, .8fr) auto auto;
  gap: 8px;
  align-items: center;
  padding: 10px;
  border: var(--border);
  border-radius: 16px;
  background: var(--cream);
  box-shadow: var(--shadow-small);
  max-width: 760px;
}
.owner-login-panel input {
  padding: 9px 10px;
  border-width: 2px;
  box-shadow: none;
  min-width: 0;
}
.owner-login-panel .ghost-btn {
  padding: 9px 11px;
  white-space: nowrap;
}
.owner-login-panel small {
  grid-column: 1 / -1;
  font-weight: 900;
  color: var(--muted);
}
.owner-mode .owner-login-panel { background: var(--mint); }
.visitor-mode .form-panel { opacity: .72; }
.visitor-mode .primary-btn { filter: grayscale(.35); cursor: not-allowed; }
.read-only-chip {
  display: inline-flex;
  align-items: center;
  padding: 8px 10px;
  border: 2px solid var(--ink);
  border-radius: 999px;
  background: var(--sand);
  font-size: .82rem;
  font-weight: 1000;
}
button:disabled, input:disabled, select:disabled {
  opacity: .64;
  cursor: not-allowed;
}
@media (max-width: 980px) {
  .owner-login-panel { grid-template-columns: 1fr 1fr; width: 100%; }
  .owner-login-panel .ghost-btn { width: 100%; }
}
@media (max-width: 640px) {
  .owner-login-panel { grid-column: 1 / -1; grid-template-columns: 1fr; }
}