:root {
  --bg: #f1f3f8;
  --panel: #ffffff;
  --border: #e6e8f0;
  --text: #161824;
  --text-dim: #6b7280;
  --accent: #4457e8;
  --accent-2: #6d5bf5;
  --accent-dim: #eef0ff;
  --success: #16824b;
  --success-bg: #e7f8ef;
  --warn: #a15c00;
  --warn-bg: #fff4e0;
  --error: #c22a2a;
  --error-bg: #fdecec;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow-sm: 0 1px 2px rgba(20, 24, 50, 0.05);
  --shadow-md: 0 6px 20px rgba(20, 24, 50, 0.08);
  font-family: "Segoe UI", -apple-system, Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background:
    radial-gradient(1200px 500px at 100% -10%, rgba(109, 91, 245, 0.08), transparent),
    radial-gradient(900px 400px at -10% 0%, rgba(68, 87, 232, 0.06), transparent),
    var(--bg);
  color: var(--text);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

#app { min-height: 100vh; display: flex; flex-direction: column; }

.hidden { display: none !important; }

/* ---------- Auth screens ---------- */
.auth-wrap {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.auth-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 36px 32px;
  width: 100%;
  max-width: 380px;
  box-shadow: var(--shadow-md);
}

.auth-card .logo-mark {
  height: 40px;
  width: auto;
  object-fit: contain;
  display: block;
  margin-bottom: 18px;
}

.auth-card h1 {
  font-size: 1.35rem;
  margin: 0 0 4px;
  letter-spacing: -0.01em;
}

.auth-card p.sub {
  color: var(--text-dim);
  font-size: 0.88rem;
  margin: 0 0 22px;
}

label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text-dim);
}

input[type=text], input[type=password], input[type=number], select {
  width: 100%;
  padding: 10px 12px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  margin-bottom: 14px;
  background: #fff;
  color: var(--text);
  transition: border-color .15s, box-shadow .15s;
}

input:focus, select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
}

button { cursor: pointer; font: inherit; }

.btn {
  border: none;
  border-radius: var(--radius-sm);
  padding: 10px 18px;
  font-weight: 600;
  font-size: 0.88rem;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: white;
  box-shadow: 0 2px 6px rgba(68, 87, 232, 0.25);
  transition: transform .1s, box-shadow .15s, opacity .15s;
}
.btn:hover { box-shadow: 0 4px 14px rgba(68, 87, 232, 0.35); transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; box-shadow: none; transform: none; }
.btn.secondary {
  background: var(--panel);
  color: var(--text);
  border: 1.5px solid var(--border);
  box-shadow: none;
}
.btn.secondary:hover { border-color: var(--accent); color: var(--accent); box-shadow: none; }
.btn.danger { background: linear-gradient(135deg, var(--error), #e05353); box-shadow: 0 2px 6px rgba(194, 42, 42, 0.25); }
.btn.block { width: 100%; }

.error-msg, .ok-msg {
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  margin-bottom: 14px;
  display: flex;
  gap: 8px;
  align-items: flex-start;
}
.error-msg { background: var(--error-bg); color: var(--error); border: 1px solid rgba(194, 42, 42, 0.15); }
.ok-msg { background: var(--success-bg); color: var(--success); border: 1px solid rgba(22, 130, 75, 0.15); }

/* ---------- App shell ---------- */
header.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 24px;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 20;
}

.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.02rem; letter-spacing: -0.01em; }
.brand .logo-mark {
  height: 28px;
  width: auto;
  object-fit: contain;
  display: block;
}

nav.tabs { display: flex; gap: 4px; background: var(--bg); padding: 4px; border-radius: 10px; }
nav.tabs button {
  background: none;
  border: none;
  padding: 7px 16px;
  border-radius: 8px;
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--text-dim);
  transition: background .15s, color .15s;
}
nav.tabs button:hover { color: var(--text); }
nav.tabs button.active { background: var(--panel); color: var(--accent); box-shadow: var(--shadow-sm); }

.topbar-right { display: flex; align-items: center; gap: 14px; font-size: 0.85rem; color: var(--text-dim); flex-shrink: 0; }

@media (max-width: 820px) {
  header.topbar { flex-wrap: wrap; row-gap: 10px; }
  .brand { order: 1; }
  .topbar-right { order: 2; margin-left: auto; }
  nav.tabs { order: 3; width: 100%; justify-content: center; }
}
.topbar-right .avatar {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--accent-dim);
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.75rem;
  margin-right: 4px;
}

main.content { flex: 1; padding: 28px 24px 60px; max-width: 1120px; margin: 0 auto; width: 100%; }

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 24px;
  margin-bottom: 20px;
  box-shadow: var(--shadow-sm);
}
.card h2 { margin: 0 0 4px; font-size: 1.05rem; letter-spacing: -0.01em; }
.card p.sub { color: var(--text-dim); font-size: 0.85rem; margin: 0 0 16px; }

/* ---------- Dropzone ---------- */
.dropzone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 42px 20px;
  text-align: center;
  color: var(--text-dim);
  cursor: pointer;
  transition: border-color .15s, background .15s;
  background: linear-gradient(180deg, rgba(68,87,232,0.02), transparent);
}
.dropzone:hover { border-color: var(--accent); }
.dropzone.drag { border-color: var(--accent); background: var(--accent-dim); }
.dropzone strong { color: var(--text); }
.dropzone .icon { font-size: 1.8rem; margin-bottom: 8px; opacity: 0.7; }

.file-list { margin-top: 14px; display: flex; flex-direction: column; gap: 6px; }
.file-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 9px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  background: #fbfbfe;
}
.file-row button {
  background: none;
  border: none;
  color: var(--error);
  font-size: 0.78rem;
  font-weight: 600;
  padding: 4px 8px;
  border-radius: 6px;
}
.file-row button:hover { background: var(--error-bg); }

/* ---------- Table ---------- */
.table-wrap { border: 1px solid var(--border); border-radius: var(--radius-sm); overflow: hidden; }
table { width: 100%; border-collapse: collapse; font-size: 0.85rem; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); vertical-align: top; }
th { color: var(--text-dim); font-weight: 600; font-size: 0.72rem; text-transform: uppercase; letter-spacing: .04em; background: #fafbfd; }
tr:last-child td { border-bottom: none; }
tbody tr:hover { background: #fafbff; }

.reason-text { display: block; margin-top: 3px; font-size: 0.78rem; color: var(--error); }
.reason-text.warn { color: var(--warn); }

.badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 700;
  white-space: nowrap;
}
.badge::before { content: ''; width: 6px; height: 6px; border-radius: 50%; background: currentColor; flex-shrink: 0; }
.badge.pending, .badge.processing { background: var(--accent-dim); color: var(--accent); }
.badge.success { background: var(--success-bg); color: var(--success); }
.badge.success_review { background: var(--warn-bg); color: var(--warn); }
.badge.error { background: var(--error-bg); color: var(--error); }

.progress-bar {
  height: 8px;
  border-radius: 999px;
  background: var(--border);
  overflow: hidden;
  margin: 10px 0 4px;
}
.progress-bar > div { height: 100%; background: linear-gradient(90deg, var(--accent), var(--accent-2)); transition: width .25s; }

.alert-banner {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  margin-bottom: 16px;
}
.alert-banner.error { background: var(--error-bg); color: var(--error); border: 1px solid rgba(194,42,42,0.15); }
.alert-banner.warn { background: var(--warn-bg); color: var(--warn); border: 1px solid rgba(161,92,0,0.15); }
.alert-banner .icon { font-size: 1rem; line-height: 1.3; }

/* ---------- Stats ---------- */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 14px;
  margin-bottom: 20px;
}
.stat-tile {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: var(--shadow-sm);
}
.stat-tile .num { font-size: 1.9rem; font-weight: 800; letter-spacing: -0.02em; }
.stat-tile .label { color: var(--text-dim); font-size: 0.8rem; margin-top: 3px; }
.stat-tile.success .num { color: var(--success); }
.stat-tile.warn .num { color: var(--warn); }
.stat-tile.error .num { color: var(--error); }

.bar-row { display: flex; align-items: center; gap: 10px; margin-bottom: 9px; font-size: 0.82rem; }
.bar-row .bar-label { width: 130px; flex-shrink: 0; color: var(--text-dim); }
.bar-track { flex: 1; height: 10px; background: var(--bg); border-radius: 999px; overflow: hidden; }
.bar-track > div { height: 100%; background: linear-gradient(90deg, var(--accent), var(--accent-2)); border-radius: 999px; }
.bar-row .bar-val { width: 40px; text-align: right; font-weight: 700; }

.chart-svg { width: 100%; height: 150px; }

.small-muted { color: var(--text-dim); font-size: 0.8rem; }

.field-row { display: flex; gap: 12px; }
.field-row > div { flex: 1; }

.toast-stack {
  position: fixed;
  bottom: 20px;
  right: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  z-index: 100;
  max-width: 360px;
}
.toast {
  background: var(--text);
  color: white;
  padding: 11px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.84rem;
  box-shadow: var(--shadow-md);
  display: flex;
  gap: 8px;
  align-items: flex-start;
  animation: toast-in .18s ease-out;
}
.toast.error { background: linear-gradient(135deg, #c22a2a, #a51f1f); }
.toast.success { background: linear-gradient(135deg, #16824b, #106b3d); }
.toast .icon { flex-shrink: 0; }
@keyframes toast-in {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}