:root {
  --green: #2D8B57;
  --green-dark: #25744A;
  --purple: #7B5BAD;
  --dark: #111827;
  --bg: #F9FAFB;
  --text: #1F2937;
  --section: #F3F4F6;
  --muted: #6B7280;
  --border: #E5E7EB;
  --error: #B91C1C;
  --error-bg: #FEF2F2;
  --success: #166534;
  --success-bg: #F0FDF4;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ---------- Top bar ---------- */

.topbar {
  background: var(--dark);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1.25rem;
}

.topbar-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: #fff;
  text-decoration: none;
  font-weight: 700;
  font-size: 1.15rem;
}

.topbar-brand em {
  font-style: normal;
  color: var(--green);
}

.topbar-mark { height: 2rem; }

.topbar-nav {
  display: flex;
  gap: 1.25rem;
}

.topbar-nav a {
  color: #D1D5DB;
  text-decoration: none;
  font-size: 0.95rem;
}

.topbar-nav a:hover { color: #fff; }

/* ---------- Layout ---------- */

.auth-main {
  flex: 1;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 2.5rem 1rem;
}

.app-main {
  flex: 1;
  width: 100%;
  max-width: 960px;
  margin: 0 auto;
  padding: 2rem 1rem;
}

.footer {
  text-align: center;
  color: var(--muted);
  font-size: 0.85rem;
  padding: 1.5rem 1rem;
}

.footer a { color: var(--muted); }

/* ---------- Auth card ---------- */

.auth-card {
  background: #fff;
  border-radius: 10px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.08);
  padding: 2rem;
  width: 100%;
  max-width: 420px;
}

.auth-card-wide { max-width: 520px; }

.auth-card h1 {
  margin: 0 0 0.25rem;
  font-size: 1.5rem;
}

.auth-sub {
  color: var(--muted);
  margin: 0 0 1.5rem;
  font-size: 0.95rem;
}

.auth-alt {
  text-align: center;
  font-size: 0.9rem;
  margin: 1rem 0 0;
}

.auth-privacy {
  text-align: center;
  font-size: 0.8rem;
  color: var(--muted);
  margin: 0.75rem 0 0;
}

a { color: var(--green); }

/* ---------- Forms ---------- */

.field { margin-bottom: 1rem; }

.field-row {
  display: flex;
  gap: 0.75rem;
}

.field-row .field { flex: 1; }

label, .label {
  display: block;
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 0.3rem;
}

.optional {
  font-weight: 400;
  color: var(--muted);
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"] {
  width: 100%;
  padding: 0.65rem 0.75rem;
  min-height: 44px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 1rem;
  color: var(--text);
  background: #fff;
}

input:focus {
  outline: 2px solid var(--green);
  outline-offset: 0;
  border-color: var(--green);
}

.field-hint {
  font-size: 0.8rem;
  color: var(--muted);
  margin: 0.3rem 0 0;
}

.field-error {
  font-size: 0.85rem;
  color: var(--error);
  margin: 0.3rem 0 0;
}

.form-error {
  background: var(--error-bg);
  color: var(--error);
  border-radius: 6px;
  padding: 0.75rem 1rem;
  font-size: 0.9rem;
}

.form-success {
  background: var(--success-bg);
  color: var(--success);
  border-radius: 6px;
  padding: 0.75rem 1rem;
  font-size: 0.9rem;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 400;
}

.checkbox-label input { width: 1.1rem; height: 1.1rem; }

/* ---------- Password toggle ---------- */

.password-wrap { position: relative; }

.password-wrap input { padding-right: 4rem; }

.password-toggle {
  position: absolute;
  right: 0.5rem;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--green);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  padding: 0.4rem;
}

/* ---------- Segmented unit toggle ---------- */

.segmented {
  display: inline-flex;
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
}

.segment input { position: absolute; opacity: 0; }

.segment span {
  display: inline-block;
  padding: 0.5rem 1.5rem;
  min-height: 44px;
  line-height: 1.9;
  cursor: pointer;
  font-weight: 600;
  color: var(--muted);
  background: #fff;
}

.segment input:checked + span {
  background: var(--green);
  color: #fff;
}

/* ---------- Thresholds details ---------- */

.thresholds {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.75rem 1rem;
  margin-bottom: 1rem;
  background: var(--section);
}

.thresholds summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 0.9rem;
}

.thresholds[open] summary { margin-bottom: 0.75rem; }

/* ---------- Buttons ---------- */

.btn {
  display: inline-block;
  padding: 0.7rem 1.5rem;
  min-height: 44px;
  border-radius: 6px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  text-decoration: none;
  text-align: center;
}

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

.btn-primary:hover { background: var(--green-dark); }

.btn-outline {
  background: transparent;
  color: var(--green);
  border: 2px solid var(--green);
}

.btn-outline:hover {
  background: var(--green);
  color: #fff;
}

.btn-danger {
  background: transparent;
  color: var(--error);
  border: 1px solid var(--error);
}

.btn-danger:hover {
  background: var(--error);
  color: #fff;
}

.btn-block { width: 100%; }

.btn-sm {
  padding: 0.4rem 0.9rem;
  min-height: 36px;
  font-size: 0.85rem;
}

.btn[disabled] { opacity: 0.6; cursor: wait; }

/* ---------- App pages ---------- */

.page-title {
  font-size: 1.6rem;
  margin: 0 0 0.25rem;
}

.page-sub {
  color: var(--muted);
  margin: 0 0 1.5rem;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
  margin-top: 1.5rem;
}

.card {
  background: #fff;
  border-radius: 10px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.08);
  padding: 1.5rem;
}

.card h2 {
  margin: 0 0 0.5rem;
  font-size: 1.1rem;
}

.card-sub {
  color: var(--muted);
  font-size: 0.9rem;
  margin: 0 0 1rem;
}

.card-note {
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 0;
}

.mini-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

.mini-table td {
  padding: 0.45rem 0;
  border-bottom: 1px solid var(--section);
}

.mini-table td:last-child {
  text-align: right;
  font-weight: 600;
}

/* ---------- Weather card ---------- */

.weather-values {
  display: flex;
  gap: 2rem;
  margin: 1rem 0;
}

.weather-value { text-align: center; }

.weather-num {
  display: block;
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--green);
}

.weather-label {
  font-size: 0.8rem;
  color: var(--muted);
}

/* ---------- Gateways ---------- */

.gateway-row {
  display: flex;
  align-items: flex-end;
  gap: 0.5rem;
  padding-bottom: 1rem;
  margin-bottom: 1rem;
  border-bottom: 1px solid var(--section);
}

.gateway-rename {
  flex: 1;
  display: flex;
  align-items: flex-end;
  gap: 0.5rem;
}

.gateway-rename .field {
  flex: 1;
  margin-bottom: 0;
}

code {
  background: var(--section);
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
  font-size: 0.85em;
}

/* ---------- Mobile ---------- */

@media (max-width: 480px) {
  .field-row { flex-direction: column; gap: 0; }
  .topbar-nav { gap: 0.9rem; font-size: 0.9rem; }
  .auth-card { padding: 1.5rem; }
  .gateway-row { flex-wrap: wrap; }
}