:root {
  --bg: #f4f7fb;
  --panel: #ffffff;
  --muted: #5f6b7a;
  --text: #111827;
  --primary: #0b8a6a;
  --primary-soft: #e5f4ef;
  --danger: #c53030;
  --danger-soft: #fdecea;
  --border: #d8dee8;
  --shadow: 0 8px 24px rgba(15, 23, 42, 0.08);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  font-family: 'Segoe UI', 'Trebuchet MS', sans-serif;
  background: radial-gradient(circle at 20% 0%, #eaf4ff 0%, var(--bg) 45%), var(--bg);
  color: var(--text);
}

h1,
h2,
h3,
p {
  margin: 0;
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: var(--shadow);
}

.btn {
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #fff;
  color: var(--text);
  cursor: pointer;
  padding: 8px 12px;
  font-size: 14px;
}

.btn:hover {
  opacity: 0.92;
}

.btn-primary {
  border-color: transparent;
  background: var(--primary);
  color: #fff;
}

.btn-danger {
  border-color: transparent;
  background: var(--danger);
  color: #fff;
}

.btn-ghost {
  background: #fff;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: 180px 1fr auto;
  gap: 12px;
  align-items: center;
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.9);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(8px);
}

.brand {
  font-size: 20px;
  font-weight: 700;
}

.tabs-row {
  display: flex;
  gap: 10px;
  align-items: center;
  overflow-x: auto;
}

.tabs-list {
  display: flex;
  gap: 8px;
}

.tab-chip {
  display: flex;
  gap: 6px;
  align-items: center;
  border: 1px solid var(--border);
  background: #fff;
  border-radius: 999px;
  padding: 6px 10px;
  min-width: 120px;
}

.tab-chip.active {
  background: var(--primary-soft);
  border-color: #9ad3c2;
}

.tab-chip input {
  width: 100%;
  border: none;
  outline: none;
  background: transparent;
  font-size: 14px;
}

.tab-label {
  cursor: pointer;
  white-space: nowrap;
  max-width: 200px;
  overflow: hidden;
  text-overflow: ellipsis;
}

.layout {
  display: grid;
  grid-template-columns: minmax(380px, 520px) 1fr;
  gap: 14px;
  padding: 14px;
}

.panel {
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-height: calc(100vh - 110px);
}

.section {
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.section h2 {
  font-size: 18px;
}

.subsection h3 {
  font-size: 15px;
  margin-bottom: 8px;
}

.section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.field span {
  color: var(--muted);
  font-size: 13px;
}

input,
select {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 8px 10px;
  font-size: 14px;
  width: 100%;
}

input[type='radio'],
input[type='checkbox'] {
  width: auto;
  padding: 0;
  border: none;
  border-radius: 0;
}

.note {
  font-size: 14px;
  color: var(--muted);
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.stack {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.inline-group {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.inline-group label {
  display: inline-flex;
  gap: 6px;
  align-items: center;
  font-size: 14px;
}

.switch {
  display: inline-flex;
  gap: 8px;
  align-items: center;
  color: var(--muted);
  font-size: 14px;
}

.error {
  min-height: 18px;
  color: var(--danger);
  font-size: 13px;
}

.muted {
  color: var(--muted);
  font-size: 14px;
}

.slider-row {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px;
  display: grid;
  grid-template-columns: 1fr 160px;
  gap: 10px;
}

.slider-row .label {
  font-size: 14px;
  margin-bottom: 6px;
}

.slider-controls {
  display: flex;
  gap: 8px;
}

.slider-controls input[type='number'] {
  width: 100%;
}

.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 10px;
}

.kpi-card {
  border: 1px solid var(--border);
  border-radius: 12px;
  background: #fff;
  padding: 10px;
}

.kpi-label {
  color: var(--muted);
  font-size: 13px;
}

.kpi-value {
  margin-top: 5px;
  font-size: 22px;
  font-weight: 700;
}

.kpi-delta {
  margin-top: 4px;
  font-size: 13px;
}

.kpi-positive {
  color: #047857;
}

.kpi-negative {
  color: #b91c1c;
}

.chart-wrap {
  height: 280px;
  margin-top: 8px;
}

.ai-result {
  min-height: 80px;
  max-height: 300px;
  overflow: auto;
  white-space: pre-wrap;
  background: #f8fbff;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px;
}

.extra-cost-row,
.step-row {
  display: grid;
  grid-template-columns: 1.2fr 100px 130px 34px;
  gap: 8px;
}

.login-body {
  min-height: 100vh;
  display: grid;
  place-items: center;
}

.login-wrap {
  width: 100%;
  max-width: 420px;
  padding: 16px;
}

.login-card {
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.mobile-nav {
  display: none;
}

.mobile-visible {
  display: flex;
}

.hidden {
  display: none !important;
}

@media (max-width: 1100px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .panel {
    min-height: auto;
  }

  .panel-left,
  .panel-right {
    display: none;
  }

  .panel.mobile-visible {
    display: flex;
  }

  .mobile-nav {
    position: fixed;
    bottom: 12px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 8px;
    background: rgba(255, 255, 255, 0.95);
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 8px;
    z-index: 30;
  }

  .topbar {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .grid-2,
  .grid-3,
  .slider-row,
  .extra-cost-row,
  .step-row {
    grid-template-columns: 1fr;
  }
}