:root {
  --bg: #eef4fb;
  --panel: rgba(255,255,255,.92);
  --card: rgba(255,255,255,.92);
  --text: #101828;
  --muted: #667085;
  --line: #e4eaf2;
  --accent: #2563eb;
  --accent2: #06b6d4;
  --accent-soft: #eaf4ff;
  --danger: #ef4444;
  --shadow: 0 18px 50px rgba(16, 24, 40, .12);
}

* { box-sizing: border-box; }

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

.app {
  height: 100vh;
  display: grid;
  grid-template-columns: 365px 1fr;
  overflow: hidden;
}

.sidebar {
  padding: 18px;
  overflow: auto;
  background:
    radial-gradient(circle at 20% 0%, rgba(37, 99, 235, .16), transparent 34%),
    radial-gradient(circle at 80% 16%, rgba(6, 182, 212, .16), transparent 30%),
    linear-gradient(180deg, #f8fbff, #edf4fb);
}

.phone-panel {
  max-width: 335px;
  margin: 0 auto;
  background: var(--panel);
  border: 1px solid #dbe6f3;
  border-radius: 24px;
  padding: 14px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px);
}

.brand {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 6px 4px 14px;
}

.brand h1 { margin: 0; font-size: 1.35rem; }
.brand p { margin: 2px 0 0; color: var(--muted); font-size: .85rem; }

.card {
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 14px;
  margin-bottom: 12px;
  background: var(--card);
}

h2 { margin: 0 0 12px; font-size: .95rem; }

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

.toggle-row {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--accent);
  font-size: .74rem;
  white-space: nowrap;
}

.switch {
  position: relative;
  width: 34px;
  height: 20px;
  display: inline-block;
}

.switch input { display: none; }

.switch span {
  position: absolute;
  cursor: pointer;
  inset: 0;
  background: #e5e7eb;
  border-radius: 999px;
  transition: .2s;
}

.switch span:before {
  content: "";
  position: absolute;
  width: 16px;
  height: 16px;
  left: 2px;
  top: 2px;
  background: white;
  border-radius: 50%;
  transition: .2s;
  box-shadow: 0 1px 3px rgba(0,0,0,.18);
}

.switch input:checked + span {
  background: linear-gradient(135deg, var(--accent), var(--accent2));
}

.switch input:checked + span:before { transform: translateX(14px); }

.stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  padding: 12px 8px;
  background: linear-gradient(180deg, #fbfdff, #f6f9fc);
  border-radius: 14px;
  margin-bottom: 14px;
}

.stats-grid div { text-align: center; }
.stat-icon { display: block; color: var(--accent); font-weight: 800; line-height: 1; margin-bottom: 2px; }
.stats-grid strong { display: block; font-size: 1rem; }
.stats-grid small { display: block; color: var(--muted); font-size: .68rem; }

.field {
  display: block;
  color: var(--muted);
  font-size: .78rem;
  margin-bottom: 12px;
}

input, select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  padding: 10px;
  color: var(--text);
  outline: none;
  margin-top: 6px;
}

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

.range-block { margin: 12px 0; }
.range-head { display: flex; justify-content: space-between; font-size: .76rem; margin-bottom: 4px; }
.range-head strong { color: var(--accent); font-weight: 600; }

input[type="range"] {
  accent-color: var(--accent);
  padding: 0;
}

.hint {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: .72rem;
  line-height: 1.35;
}

.toggle-line {
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--text);
  font-size: .82rem;
  margin-top: 8px;
}

.button-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.button-stack {
  display: grid;
  gap: 8px;
}

button {
  border: 0;
  border-radius: 10px;
  padding: 10px 9px;
  background: #f2f4f7;
  color: var(--text);
  font-weight: 700;
  cursor: pointer;
}

button:hover { filter: brightness(.98); }
button:disabled { opacity: .55; cursor: not-allowed; }

.icon-primary,
.main-action {
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #fff;
}

button.danger {
  background: #fff1f2;
  color: var(--danger);
}

.search-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px;
}

.list { display: grid; gap: 8px; margin-top: 10px; }

.list-item {
  padding: 9px;
  border: 1px solid var(--line);
  border-radius: 10px;
  cursor: pointer;
  font-size: .78rem;
  color: var(--muted);
  background: #fff;
}

.saved-line {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px;
  align-items: center;
}

.map-area { position: relative; min-width: 0; }
#map { height: 100%; width: 100%; }

.floating-summary {
  position: absolute;
  z-index: 500;
  top: 16px;
  left: 16px;
  display: flex;
  gap: 10px;
  background: rgba(255,255,255,.92);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 9px 12px;
  color: var(--muted);
  font-size: .82rem;
  box-shadow: 0 8px 30px rgba(16,24,40,.12);
}

#elevationCanvas {
  position: absolute;
  z-index: 500;
  left: 16px;
  right: 16px;
  bottom: 16px;
  width: calc(100% - 32px);
  height: 100px;
  background: rgba(255,255,255,.94);
  border: 1px solid var(--line);
  border-radius: 16px;
  box-shadow: 0 8px 30px rgba(16,24,40,.12);
}

.toast {
  position: absolute;
  z-index: 800;
  top: 64px;
  left: 50%;
  transform: translateX(-50%);
  display: none;
  padding: 10px 14px;
  border-radius: 999px;
  background: #101828;
  color: white;
  font-size: .85rem;
}

.leaflet-tooltip {
  border-radius: 999px;
  border: 0;
  font-weight: 800;
}

@media (max-width: 920px) {
  .app { grid-template-columns: 1fr; overflow: auto; }
  .sidebar { order: 2; }
  .map-area { order: 1; height: 60vh; }
  .phone-panel { max-width: none; }
}