:root {
  --bg: #f7f8fb;
  --surface: #ffffff;
  --surface-2: #eef2f7;
  --text: #111827;
  --muted: #667085;
  --border: #d9e0ea;
  --blue: #2563eb;
  --blue-soft: #e8f0ff;
  --green: #12805c;
  --green-soft: #e8f7f1;
  --amber: #b75b00;
  --amber-soft: #fff4df;
  --red: #b42318;
  --red-soft: #fff0ef;
  --shadow: 0 16px 40px rgba(15, 23, 42, 0.08);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-width: 320px;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  letter-spacing: 0;
}

button, input, select { font: inherit; }
button { cursor: pointer; }

.boot-screen,
.login-page {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.login-card {
  width: min(440px, 100%);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: var(--shadow);
  padding: 24px;
}

.brand-row {
  display: flex;
  gap: 12px;
  align-items: center;
  margin-bottom: 24px;
}

.brand-row.compact { margin-bottom: 20px; }

.brand-mark {
  width: 40px;
  height: 40px;
  border-radius: 8px;
  display: grid;
  place-items: center;
  background: var(--blue);
  color: white;
  font-weight: 800;
}

.brand-row h1 { margin: 0; font-size: 20px; line-height: 1.1; }
.brand-row p { margin: 3px 0 0; color: var(--muted); font-size: 13px; }

.stack { display: flex; flex-direction: column; gap: 10px; }

label {
  color: #344054;
  font-size: 12px;
  font-weight: 700;
}

input,
select {
  width: 100%;
  min-height: 40px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: white;
  color: var(--text);
  padding: 8px 10px;
  outline: none;
}

input:focus,
select:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 3px var(--blue-soft);
}

.notice,
.form-message {
  display: flex;
  flex-direction: column;
  gap: 3px;
  border: 1px solid var(--blue);
  background: var(--blue-soft);
  color: #173b91;
  border-radius: 8px;
  padding: 10px 12px;
  font-size: 13px;
}

.notice.warning {
  background: var(--amber-soft);
  border-color: #f5c46b;
  color: #753200;
}

.form-message.inline { margin-top: 12px; }
.muted-line { color: var(--muted); font-size: 13px; line-height: 1.5; }

.app-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 244px minmax(0, 1fr);
}

.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  background: #0f172a;
  color: white;
  padding: 20px 14px;
}

.sidebar .brand-mark { background: #38bdf8; color: #0f172a; }
.sidebar .brand-row p { color: #94a3b8; }

.tab-nav { display: grid; gap: 4px; }

.tab-nav button {
  width: 100%;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: #cbd5e1;
  text-align: left;
  padding: 10px 12px;
  font-size: 14px;
}

.tab-nav button.active,
.tab-nav button:hover {
  background: rgba(255, 255, 255, 0.09);
  color: white;
}

.workspace { min-width: 0; }

.topbar {
  min-height: 76px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  padding: 16px 24px;
  background: rgba(247, 248, 251, 0.94);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 20;
}

.topbar h2,
.panel h3,
.skv-form h3 { margin: 0; font-size: 20px; }

.eyeline {
  margin: 0 0 3px;
  color: var(--muted);
  font-size: 12px;
  text-transform: uppercase;
  font-weight: 800;
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.month-input { width: 150px; }

.user-pill {
  min-height: 38px;
  display: inline-flex;
  align-items: center;
  padding: 0 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: white;
  font-size: 13px;
  font-weight: 700;
}

.content { padding: 24px; }
.grid-two { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.metric-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
.settings-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }

.panel,
.metric-card,
.hero-panel,
.skv-form,
.ruta-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.panel { padding: 18px; }
.full-width { grid-column: 1 / -1; }

.hero-panel {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  padding: 24px;
  margin-bottom: 16px;
}

.hero-panel h1 {
  margin: 0;
  font-size: clamp(28px, 4vw, 44px);
  letter-spacing: 0;
}

.hero-panel p:last-child {
  max-width: 640px;
  color: var(--muted);
  line-height: 1.55;
}

.result-badge {
  min-width: 170px;
  border-radius: 8px;
  background: var(--blue-soft);
  color: #173b91;
  padding: 16px;
  font-size: 26px;
  font-weight: 900;
  text-align: right;
}

.result-badge.refund { background: var(--green-soft); color: var(--green); }
.result-badge span { display: block; font-size: 12px; margin-top: 4px; }

.metric-card { padding: 16px; }
.metric-card span { display: block; color: var(--muted); font-size: 12px; font-weight: 800; text-transform: uppercase; }
.metric-card strong { display: block; margin-top: 8px; font-size: 24px; }

.split-panel {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  margin-top: 16px;
}

.button-row { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }

.primary-btn,
.secondary-btn,
.ghost-btn {
  min-height: 40px;
  border-radius: 6px;
  border: 1px solid transparent;
  padding: 8px 12px;
  font-weight: 800;
}

.primary-btn { background: var(--blue); color: white; }
.secondary-btn { background: white; color: var(--text); border-color: var(--border); }
.ghost-btn { background: var(--surface-2); color: var(--text); border-color: var(--border); }
.compact-btn { min-height: 36px; }

.section-head {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  margin-bottom: 16px;
}

.skv-form { padding: 18px; }
.ruta-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.ruta-card { display: grid; grid-template-columns: 1fr auto auto; align-items: center; gap: 12px; padding: 14px; box-shadow: none; }
.ruta-card span { font-weight: 900; }
.ruta-card p { margin: 4px 0 0; color: var(--muted); font-size: 13px; }
.ruta-card strong { font-size: 20px; }
.ruta-card.total { border-color: var(--blue); background: var(--blue-soft); }

.math-trace {
  margin-top: 14px;
  padding: 12px;
  border-radius: 8px;
  background: var(--surface-2);
  color: #344054;
  font-size: 13px;
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: white;
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 780px;
}

th, td {
  border-bottom: 1px solid var(--border);
  padding: 10px;
  text-align: left;
  font-size: 13px;
  vertical-align: top;
}

th {
  color: #475467;
  background: #f9fafb;
  font-size: 12px;
  text-transform: uppercase;
}

.compact-form {
  display: grid;
  grid-template-columns: 1fr 1fr auto;
  gap: 8px;
  align-items: end;
}

.connection-form {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.connection-form .span-2 { grid-column: 1 / -1; }

.connection-list {
  display: grid;
  gap: 8px;
  margin-top: 12px;
}

.connection-empty { margin-bottom: 0; }

.connection-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 12px;
  align-items: center;
  padding: 10px;
  background: var(--surface-2);
  border-radius: 6px;
}

.connection-main {
  min-width: 0;
  display: grid;
  gap: 3px;
  font-size: 13px;
}

.connection-main strong,
.connection-main span {
  min-width: 0;
  overflow-wrap: anywhere;
}

.connection-main span { color: var(--muted); }

.keyword-list { display: grid; gap: 8px; margin-top: 12px; }
.keyword-list div {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 10px;
  background: var(--surface-2);
  border-radius: 6px;
  font-size: 13px;
}

.status-line { margin: 12px 0 0; color: var(--muted); font-size: 13px; }
.danger { color: var(--red); }

@media (max-width: 920px) {
  .app-shell { grid-template-columns: 1fr; }
  .sidebar { position: static; height: auto; }
  .tab-nav { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .topbar { position: static; align-items: flex-start; flex-direction: column; }
  .grid-two, .metric-grid, .settings-grid, .ruta-grid { grid-template-columns: 1fr; }
  .hero-panel, .split-panel, .section-head { align-items: flex-start; flex-direction: column; }
  .result-badge { text-align: left; }
  .content { padding: 16px; }
}

@media (max-width: 560px) {
  .connection-form { grid-template-columns: 1fr; }
  .connection-form .span-2 { grid-column: auto; }
  .connection-row { grid-template-columns: 1fr; }
}

@media print {
  .sidebar, .topbar, .button-row, .ghost-btn { display: none !important; }
  .app-shell { display: block; }
  .content { padding: 0; }
  .panel, .metric-card, .hero-panel, .skv-form, .ruta-card { box-shadow: none; }
}