:root {
  --bg: #eaf4ff;
  --bg-soft: #f4f9ff;
  --panel: #ffffff;
  --ink: #0f3554;
  --muted: #4d6d87;
  --line: #c5daee;
  --line-strong: #a9c9e6;
  --action: #1778d4;
  --action-hover: #0e68bf;
  --action-soft: #e8f4ff;
  --ui-font-size: 0.91rem;
  --radius-sm: 10px;
  --radius-md: 14px;
  --radius-lg: 18px;
  --shadow-soft: 0 8px 24px rgba(24, 84, 138, 0.08);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  height: 100%;
  font-family: "Manrope", "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  font-size: 15px;
  line-height: 1.35;
  color: var(--ink);
  background:
    radial-gradient(circle at 15% 10%, #f6fbff 0%, transparent 48%),
    linear-gradient(180deg, #e7f3ff 0%, #eef7ff 100%);
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.layout {
  flex: 1;
  min-height: calc(100vh - 44px);
  display: grid;
  gap: 14px;
  padding: 14px;
  grid-template-columns: 390px 1fr;
}

.panel {
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-height: 0;
  overflow-y: auto;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--panel);
  box-shadow: var(--shadow-soft);
  font-size: var(--ui-font-size);
}

.hint {
  margin: 0;
  padding: 0;
  border: none;
  border-radius: 0;
  background: transparent;
  font-size: 0.82rem;
  color: var(--muted);
}

.hint code {
  color: #0d5ca8;
  background: transparent;
  border-radius: 0;
  padding: 0;
  font-size: 0.8rem;
}

.form {
  display: grid;
  gap: 12px;
}

label,
.control-label,
.checkbox,
input,
select,
button,
.file-picker-btn,
.file-picker-name,
.status,
.summary,
.section-title {
  font-size: var(--ui-font-size);
}

label {
  display: inline-block;
  font-weight: 600;
  color: var(--ink);
}

.section-title {
  margin: 4px 0 0;
  font-weight: 700;
  color: #145d99;
}

.field-help {
  margin: -5px 0 0;
  font-size: 0.8rem;
  line-height: 1.35;
  color: var(--muted);
}

.file-picker {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 9px;
  align-items: center;
}

.file-input-native {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  border: 0;
  overflow: hidden;
  clip-path: inset(50%);
}

.file-picker-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  padding: 8px 12px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  background: linear-gradient(180deg, #f5faff 0%, #eaf4ff 100%);
  color: #14578f;
  font-weight: 400;
  letter-spacing: 0;
  cursor: pointer;
  transition: border-color 0.15s ease, background-color 0.15s ease, box-shadow 0.15s ease;
}

.file-picker-btn:hover {
  border-color: #8eb3d6;
  background: linear-gradient(180deg, #eef7ff 0%, #deefff 100%);
}

.file-picker-name {
  min-width: 0;
  min-height: 38px;
  display: flex;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: #ffffff;
  color: var(--muted);
  padding: 8px 10px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.file-picker-name.has-file {
  color: var(--ink);
}

.hidden {
  display: none;
}

#localSettings,
#utmSettings {
  display: grid;
  gap: 12px;
  padding: 12px;
  border: 1px solid #d8e9f8;
  border-radius: var(--radius-sm);
  background: #f8fcff;
}

#localSettings.hidden,
#utmSettings.hidden {
  display: none;
}

.grid {
  display: grid;
  gap: 10px;
  grid-template-columns: 1fr 1fr;
}

.row {
  display: flex;
  gap: 10px;
}

.row button {
  flex: 1;
}

.color-grid {
  display: grid;
  gap: 10px;
}

.advanced-style {
  border: 1px solid #d5e6f5;
  border-radius: var(--radius-sm);
  background: #f8fcff;
  overflow: hidden;
}

.advanced-style summary {
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 10px 12px;
  cursor: pointer;
  user-select: none;
  font-size: var(--ui-font-size);
  font-weight: 600;
  color: #145d99;
  background: #eef7ff;
}

.advanced-style summary::-webkit-details-marker {
  display: none;
}

.advanced-style summary::marker {
  content: "";
}

.advanced-style summary::after {
  content: "+";
  font-size: 1rem;
  font-weight: 700;
  color: #1d75c8;
}

.advanced-style[open] summary::after {
  content: "\2212";
}

.advanced-style[open] summary {
  border-bottom: 1px solid #d7e8f7;
}

.advanced-style .color-grid {
  padding: 10px;
}

.style-item {
  display: grid;
  gap: 8px;
  padding: 10px;
  border: 1px solid #d7e8f7;
  border-radius: var(--radius-sm);
  background: #f8fcff;
}

.style-controls {
  display: grid;
  gap: 9px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  align-items: end;
}

.style-controls > div {
  min-width: 0;
}

.control-label {
  display: block;
  margin-bottom: 4px;
  font-weight: 500;
  color: var(--muted);
}

input[type="number"],
input[type="text"],
select {
  width: 100%;
  min-height: 38px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: #ffffff;
  color: var(--ink);
  padding: 8px 10px;
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

input[type="number"]:focus,
input[type="text"]:focus,
select:focus,
button:focus-visible,
.file-picker-btn:focus-visible,
input[type="color"]:focus-visible {
  border-color: #5fa6e6;
  box-shadow: 0 0 0 3px rgba(23, 120, 212, 0.2);
}

input[type="color"] {
  width: 100%;
  min-height: 38px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: #ffffff;
  padding: 2px;
  cursor: pointer;
}

button {
  min-height: 39px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  cursor: pointer;
  font-weight: 600;
  color: #ffffff;
  background: linear-gradient(180deg, #2289e8 0%, #1374cf 100%);
  transition: transform 0.12s ease, filter 0.12s ease, box-shadow 0.12s ease;
}

button:hover {
  filter: brightness(0.98);
  box-shadow: 0 6px 14px rgba(20, 106, 183, 0.18);
}

button:active {
  transform: translateY(1px);
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.7;
  box-shadow: none;
}

#locateBtn {
  color: #185894;
  border-color: #9ec4e8;
  background: linear-gradient(180deg, #f3f9ff 0%, #e3f0ff 100%);
}

#locateBtn:hover {
  filter: none;
  border-color: #7daedf;
  box-shadow: 0 6px 14px rgba(65, 125, 183, 0.14);
}

#drawBtn {
  background: linear-gradient(180deg, #1f84df 0%, #0f6ec6 100%);
}

.checkbox {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  color: #184c78;
}

.checkbox input {
  width: 16px;
  height: 16px;
  accent-color: var(--action);
}

.status {
  margin-top: 4px;
  padding: 10px;
  border: 1px solid #d0e2f3;
  border-radius: var(--radius-sm);
  min-height: 42px;
  background: var(--bg-soft);
  color: var(--muted);
  line-height: 1.35;
}

.summary {
  position: relative;
  margin-top: 14px;
  padding: 14px 10px 10px;
  border: 1px solid #d0e2f3;
  border-radius: var(--radius-sm);
  background: #ffffff;
  color: var(--ink);
}

.summary-title {
  position: absolute;
  top: 0;
  left: 12px;
  transform: translateY(-50%);
  margin: 0;
  padding: 0 6px;
  font-weight: 700;
  line-height: 1.1;
  color: #145d99;
  background: #ffffff;
}

.summary-content p {
  margin: 6px 0;
}

#map {
  min-height: 520px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-soft);
}

.reservoir-marker-wrapper {
  background: transparent;
  border: none;
}

.reservoir-marker-square {
  border: 0.3px solid rgba(17, 35, 52, 0.75);
  border-radius: 2px;
  box-shadow: 0 0 0 0.3px rgba(255, 255, 255, 0.75);
}

.page-copyright {
  padding: 2px 18px 14px;
  text-align: left;
  font-size: 0.8rem;
  color: var(--muted);
}

@media (max-width: 1080px) {
  .layout {
    grid-template-columns: 1fr;
    grid-template-rows: auto minmax(58vh, 1fr);
    min-height: 0;
    padding: 10px;
    gap: 10px;
  }

  .panel {
    border-radius: var(--radius-md);
    padding: 16px;
  }

  #map {
    border-radius: var(--radius-md);
    min-height: 58vh;
  }
}

@media (max-width: 680px) {
  .grid,
  .style-controls,
  .file-picker {
    grid-template-columns: 1fr;
  }

  .row {
    flex-direction: column;
  }
}