:root {
  --bg: #f5f6f8;
  --card: #ffffff;
  --ink: #1d2433;
  --muted: #6b7280;
  --line: #e5e7eb;
  --brand: #3a86ff;
  --up: #15803d;
  --down: #b91c1c;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
}

a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }

.topbar {
  display: flex; align-items: center; gap: 1.25rem;
  background: var(--ink); color: #fff; padding: 0 1.25rem; height: 56px;
}
.topbar .brand { font-weight: 700; }
.topbar nav { display: flex; gap: 1rem; flex: 1; }
.topbar nav a { color: #cbd5e1; padding: .35rem .1rem; }
.topbar nav a.active, .topbar nav a:hover { color: #fff; text-decoration: none; }
.topbar .logout { display: flex; align-items: center; gap: .6rem; }
.topbar .who { color: #cbd5e1; font-size: .85rem; }
.topbar .logout button {
  background: transparent; border: 1px solid #475569; color: #e2e8f0;
  border-radius: 6px; padding: .3rem .6rem; cursor: pointer;
}

.container { max-width: 1080px; margin: 1.5rem auto; padding: 0 1.25rem; }

h1 { font-size: 1.5rem; margin: 0 0 1rem; }
h2 { font-size: 1.1rem; margin: 1.5rem 0 .5rem; }

.page-head { display: flex; align-items: center; justify-content: space-between; }

.platform-block, .chart-block {
  background: var(--card); border: 1px solid var(--line);
  border-radius: 10px; padding: 1rem 1.25rem; margin-bottom: 1.25rem;
}

table.data { width: 100%; border-collapse: collapse; font-size: .92rem; }
table.data th, table.data td { text-align: left; padding: .55rem .5rem; border-bottom: 1px solid var(--line); }
table.data th { color: var(--muted); font-weight: 600; font-size: .8rem; text-transform: uppercase; letter-spacing: .02em; }
table.data tr.subtotal td { font-weight: 700; background: #fafbfc; }
table.data tr.inactive { opacity: .5; }
table.batch input { width: 110px; }

.muted { color: var(--muted); }
.small { font-size: .8rem; }
.up { color: var(--up); font-weight: 600; }
.down { color: var(--down); font-weight: 600; }
.flat { color: var(--muted); }

.btn {
  display: inline-block; border: 1px solid var(--line); background: #fff; color: var(--ink);
  padding: .4rem .7rem; border-radius: 7px; cursor: pointer; font-size: .85rem;
}
.btn:hover { text-decoration: none; background: #f3f4f6; }
.btn.primary { background: var(--brand); border-color: var(--brand); color: #fff; }
.btn.primary:hover { background: #2f6fd6; }
.actions { display: flex; gap: .35rem; flex-wrap: wrap; }
form.inline { display: inline; }

.form { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 1.25rem; max-width: 520px; }
.form label, .controls label { display: block; margin-bottom: .9rem; font-weight: 600; font-size: .9rem; }
.form input, .form select, .controls select {
  display: block; width: 100%; margin-top: .3rem; padding: .5rem .6rem;
  border: 1px solid var(--line); border-radius: 7px; font-size: .95rem; font-weight: 400;
}
.controls { display: flex; gap: 1.5rem; flex-wrap: wrap; background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 1rem 1.25rem; margin-bottom: 1.25rem; }
.controls select { width: auto; min-width: 200px; }
.form-actions { display: flex; gap: .6rem; margin-top: .5rem; }

.empty { background: var(--card); border: 1px dashed var(--line); border-radius: 10px; padding: 1.5rem; text-align: center; color: var(--muted); }
.warn { background: #fff7ed; border: 1px solid #fed7aa; color: #9a3412; padding: .75rem 1rem; border-radius: 8px; }
.success { background: #f0fdf4; border: 1px solid #bbf7d0; color: #166534; padding: .75rem 1rem; border-radius: 8px; }
.error { background: #fef2f2; border: 1px solid #fecaca; color: #991b1b; padding: .6rem .8rem; border-radius: 8px; }
code { background: #eef0f3; padding: .1rem .3rem; border-radius: 4px; font-size: .85em; }

/* Login */
.login-body { display: flex; align-items: center; justify-content: center; min-height: 100vh; }
.login-card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 2rem; width: 320px; box-shadow: 0 10px 30px rgba(0,0,0,.06); }
.login-card h1 { text-align: center; font-size: 1.3rem; }
.login-card label { display: block; margin-bottom: 1rem; font-weight: 600; font-size: .9rem; }
.login-card input { display: block; width: 100%; margin-top: .35rem; padding: .55rem .6rem; border: 1px solid var(--line); border-radius: 7px; }
.login-card button { width: 100%; padding: .6rem; border: none; border-radius: 7px; background: var(--brand); color: #fff; font-size: 1rem; cursor: pointer; }