:root {
  --bg: #eef3f9;
  --text: #10233f;
  --muted: #3f536f;
  --line: rgba(16, 35, 63, 0.14);
  --glass: rgba(255, 255, 255, 0.58);
  --glass-edge: rgba(255, 255, 255, 0.7);
  --accent: #0d8ba9;
  --accent-strong: #0a6f89;
  --mono-font: "Roboto Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: "Google Sans", "Google Sans Text", sans-serif;
  color: var(--text);
  background:
    linear-gradient(165deg, #f3f8fc 0%, #ecf2fa 45%, #f1f6fb 100%),
    repeating-linear-gradient(
      0deg,
      rgba(16, 35, 63, 0.02) 0,
      rgba(16, 35, 63, 0.02) 1px,
      transparent 1px,
      transparent 30px
    ),
    repeating-linear-gradient(
      90deg,
      rgba(16, 35, 63, 0.02) 0,
      rgba(16, 35, 63, 0.02) 1px,
      transparent 1px,
      transparent 30px
    );
  padding: 2rem 1rem 3rem;
}

.app-shell {
  max-width: 1320px;
  margin: 0 auto;
}

.glass {
  background: var(--glass);
  border: 1px solid var(--glass-edge);
  border-radius: 22px;
  box-shadow: 0 8px 24px rgba(27, 66, 104, 0.08);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.top-card {
  display: flex;
  gap: 1rem;
  justify-content: space-between;
  align-items: center;
  padding: 1.2rem 1.4rem;
}

.eyebrow {
  margin: 0 0 0.2rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.74rem;
  color: var(--muted);
  font-family: var(--mono-font);
}

h1 {
  margin: 0;
  font-size: 1.7rem;
  font-weight: 700;
}

h2 {
  margin: 0 0 0.8rem;
  font-size: 1.08rem;
  letter-spacing: 0.02em;
}

.controls {
  min-width: 520px;
}

.control-grid {
  display: flex;
  gap: 0.55rem;
  align-items: flex-end;
}

.control-field {
  display: flex;
  flex-direction: column;
}

.detect-field {
  flex: 0 0 auto;
}

.control-field[hidden] {
  display: none !important;
}

.country-field {
  flex: 1;
  min-width: 220px;
}

.area-field {
  flex: 0 0 110px;
}

.control-field label {
  display: block;
  font-size: 0.82rem;
  color: var(--muted);
  margin-bottom: 0.45rem;
}

select {
  width: 100%;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.78);
  color: var(--text);
  font-family: var(--mono-font);
  font-size: 0.9rem;
  border-radius: 12px;
  padding: 0.64rem 2.1rem 0.64rem 0.78rem;
}

#country-select {
  min-width: 190px;
}

#area-select {
  min-width: 0;
}

.region-button {
  border: 0;
  cursor: pointer;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  color: #fff;
  border-radius: 12px;
  padding: 0.62rem 0.86rem;
  font-weight: 500;
  font-family: var(--mono-font);
  font-size: 0.86rem;
  min-height: 42px;
  white-space: nowrap;
  box-shadow: 0 6px 16px rgba(13, 139, 169, 0.24);
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.region-button:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: 0 8px 18px rgba(13, 139, 169, 0.28);
}

.region-button:disabled {
  cursor: wait;
  opacity: 0.72;
}

.control-hint {
  margin: 0.5rem 0 0;
  min-height: 1.1rem;
  color: var(--muted);
  font-size: 0.77rem;
  font-family: var(--mono-font);
}

.layout {
  margin-top: 1rem;
  display: grid;
  grid-template-columns: minmax(280px, 360px) 1fr;
  gap: 1rem;
}

.bottom-row {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.current-card,
.chart-card,
.avg-card,
.list-card {
  padding: 1.15rem 1.2rem;
}

.current-card {
  grid-column: 1;
}

.chart-card {
  grid-column: 2;
}

.list-card {
  grid-column: auto;
}

.avg-placeholder {
  margin: 0.55rem 0 0;
  font-size: 1rem;
  font-family: var(--mono-font);
  color: var(--muted);
}

.label {
  margin: 0;
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--muted);
  font-family: var(--mono-font);
}

.country-name {
  margin: 0.28rem 0 0;
  font-size: 1.1rem;
  font-weight: 500;
}

.price-value {
  margin: 0.54rem 0 0;
  font-size: clamp(1.75rem, 4vw, 2.35rem);
  font-weight: 700;
  line-height: 1.1;
  font-family: var(--mono-font);
}

.muted {
  margin: 0.45rem 0 0;
  color: var(--muted);
  font-size: 0.9rem;
  font-family: var(--mono-font);
}

.stats {
  margin: 1rem 0 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.55rem;
}

.stats div {
  padding: 0.6rem;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.62);
}

.stats dt {
  font-size: 0.76rem;
  color: var(--muted);
  margin-bottom: 0.2rem;
}

.stats dd {
  margin: 0;
  font-size: 0.88rem;
  font-weight: 500;
  font-family: var(--mono-font);
}

.chart {
  width: 100%;
  min-height: 330px;
  border-radius: 16px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.72), rgba(255, 255, 255, 0.52));
  border: 1px solid var(--line);
  overflow: hidden;
}

.chart svg {
  display: block;
  width: 100%;
  height: 100%;
}

.chart .grid line {
  stroke: rgba(16, 35, 63, 0.16);
  stroke-width: 1;
}

.chart .xgrid line {
  stroke: rgba(16, 35, 63, 0.08);
  stroke-width: 1;
}

.chart .grid text {
  fill: rgba(16, 35, 63, 0.76);
  font-family: var(--mono-font);
  font-size: 11px;
  text-anchor: end;
}

.chart .line {
  fill: none;
  stroke: #0b84a0;
  stroke-width: 2.6;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.chart .area {
  fill: rgba(11, 132, 160, 0.13);
}

.chart .active-line {
  stroke: rgba(14, 143, 174, 0.45);
  stroke-dasharray: 5 5;
}

.chart .active-dot {
  fill: #0e8fae;
  stroke: #ffffff;
  stroke-width: 2;
}

.chart .xlabels text {
  fill: rgba(16, 35, 63, 0.7);
  font-family: var(--mono-font);
  font-size: 10.7px;
  text-anchor: middle;
}

.future-list {
  list-style: none;
  padding: 0;
  margin: 0.6rem 0 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.future-list li {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.58rem 0.7rem;
  background: rgba(255, 255, 255, 0.65);
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 0.8rem;
}

.future-list li.active {
  border-color: rgba(11, 132, 160, 0.5);
  background: rgba(212, 245, 252, 0.65);
}

.interval-time {
  font-size: 0.82rem;
  color: var(--muted);
  font-family: var(--mono-font);
}

.interval-price {
  font-weight: 600;
  font-family: var(--mono-font);
  text-align: right;
  white-space: nowrap;
}

@media (max-width: 900px) {
  .top-card {
    flex-direction: column;
    align-items: flex-start;
  }

  .controls {
    width: 100%;
    min-width: 0;
  }

  .country-field {
    min-width: 0;
  }

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

  .current-card,
  .chart-card,
  .bottom-row,
  .avg-card,
  .list-card {
    grid-column: 1;
  }

  .bottom-row {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 620px) {
  .control-grid {
    flex-direction: column;
    align-items: stretch;
  }

  .area-field {
    flex-basis: auto;
  }

  #area-select {
    width: 100%;
  }

  .future-list li {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.2rem;
  }

  .interval-price {
    text-align: left;
  }
}