/* ============================================
   GOTAS — Terra & Água
   Dark agricultural dashboard
   ============================================ */

:root {
  /* Earth palette */
  --soil-900: #0D0F0E;
  --soil-800: #141917;
  --soil-700: #1B2320;
  --soil-600: #243029;
  --soil-500: #2E3D34;
  --soil-400: #3D5247;
  --soil-300: #5A7A6A;

  /* Water palette */
  --water-100: #E8F5ED;
  --water-200: #B8E0C8;
  --water-300: #7ECBA1;
  --water-400: #52B788;
  --water-500: #40916C;
  --water-600: #2D6A4F;
  --water-700: #1B4332;

  /* Copper accent */
  --copper-300: #D4A574;
  --copper-400: #C08B5C;
  --copper-500: #A67344;

  /* Semantic */
  --red: #E07A5F;
  --green: #7ECBA1;
  --text-primary: #E8F5ED;
  --text-secondary: #8BA99A;
  --text-muted: #5A7A6A;

  /* Type scale */
  --font-display: 'DM Serif Display', Georgia, serif;
  --font-body: 'Outfit', system-ui, sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;

  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;

  /* Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
}

/* ---- Reset ---- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  background: var(--soil-900);
  color: var(--text-primary);
  min-height: 100dvh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ---- Grain overlay ---- */
.grain {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9999;
  opacity: 0.03;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 256px;
}

/* ---- Header ---- */
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) var(--space-lg);
  border-bottom: 1px solid var(--soil-600);
  background: linear-gradient(180deg, var(--soil-800) 0%, var(--soil-900) 100%);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
}

.header__brand {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.header__logo svg {
  width: 28px;
  height: 36px;
  filter: drop-shadow(0 0 8px rgba(126, 203, 161, 0.3));
}

.header__title {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 400;
  letter-spacing: -0.02em;
  color: var(--water-300);
  line-height: 1;
}

.header__subtitle {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-top: 2px;
}

.header__compare-btn {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  background: var(--soil-700);
  border: 1px solid var(--soil-500);
  color: var(--text-secondary);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  -webkit-tap-highlight-color: transparent;
}

.header__compare-btn:hover,
.header__compare-btn.active {
  background: var(--soil-600);
  border-color: var(--water-500);
  color: var(--water-300);
}

.header__compare-btn.active {
  background: var(--water-700);
  border-color: var(--water-500);
}

/* ---- Navigation ---- */
.nav {
  padding: var(--space-md) var(--space-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  border-bottom: 1px solid var(--soil-700);
  background: var(--soil-900);
}

.nav__date-selector {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-lg);
}

.nav__arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: var(--soil-700);
  border: 1px solid var(--soil-500);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.15s ease;
  -webkit-tap-highlight-color: transparent;
}

.nav__arrow:active {
  transform: scale(0.92);
  background: var(--soil-600);
}

.nav__period {
  font-family: var(--font-display);
  font-size: 1.35rem;
  color: var(--text-primary);
  min-width: 160px;
  text-align: center;
  letter-spacing: -0.01em;
}

.nav__period--compare {
  font-size: 1.1rem;
  color: var(--copper-300);
}

.nav__compare-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  animation: slideDown 0.3s ease;
}

.nav__compare-label {
  font-family: var(--font-display);
  font-style: italic;
  color: var(--text-muted);
  font-size: 1rem;
}

.nav__sensors {
  display: flex;
  gap: var(--space-sm);
  justify-content: center;
}

.nav__sensor {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  padding: var(--space-sm) var(--space-md);
  border-radius: 100px;
  border: 1px solid var(--soil-500);
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.2s ease;
  -webkit-tap-highlight-color: transparent;
}

.nav__sensor:active {
  transform: scale(0.95);
}

.nav__sensor.active {
  background: var(--water-700);
  border-color: var(--water-500);
  color: var(--water-200);
}

/* ---- Main content ---- */
.main {
  padding: var(--space-lg);
  max-width: 960px;
  margin: 0 auto;
}

/* ---- Loading ---- */
.loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-2xl);
  gap: var(--space-md);
  color: var(--text-muted);
  font-size: 0.85rem;
}

.loading__drop {
  width: 20px;
  height: 28px;
  background: var(--water-500);
  border-radius: 50% 50% 50% 50% / 60% 60% 40% 40%;
  animation: dropPulse 1.2s ease-in-out infinite;
}

@keyframes dropPulse {
  0%, 100% { opacity: 0.4; transform: scale(1) translateY(0); }
  50% { opacity: 1; transform: scale(1.1) translateY(-4px); }
}

/* ---- Sensor Cards ---- */
.cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
}

@media (min-width: 540px) {
  .cards { grid-template-columns: 1fr 1fr; }
}

.card {
  background: var(--soil-800);
  border: 1px solid var(--soil-600);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  position: relative;
  overflow: hidden;
  animation: cardIn 0.4s ease both;
}

.card:nth-child(2) { animation-delay: 0.08s; }

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--water-500), var(--water-300));
  opacity: 0.8;
}

.card--furo2::before {
  background: linear-gradient(90deg, var(--copper-500), var(--copper-300));
}

@keyframes cardIn {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

.card__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-lg);
}

.card__sensor-name {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.card__sensor-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--water-400);
  box-shadow: 0 0 8px var(--water-400);
}

.card--furo2 .card__sensor-dot {
  background: var(--copper-400);
  box-shadow: 0 0 8px var(--copper-400);
}

.card__volume {
  font-family: var(--font-display);
  font-size: 3rem;
  line-height: 1;
  color: var(--text-primary);
  margin-bottom: 2px;
  letter-spacing: -0.03em;
}

.card__unit {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: var(--space-lg);
}

.card__stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
  border-top: 1px solid var(--soil-600);
  padding-top: var(--space-md);
}

.card__stat-label {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: var(--space-xs);
}

.card__stat-value {
  font-family: var(--font-body);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-secondary);
}

/* ---- Delta Hero (main highlight) ---- */
.delta-hero {
  text-align: center;
  padding: var(--space-xl) var(--space-lg);
  margin: var(--space-md) 0;
  border-radius: var(--radius-md);
  border: 1px solid var(--soil-600);
}

.delta-hero--down {
  background: linear-gradient(180deg, rgba(126, 203, 161, 0.12) 0%, rgba(126, 203, 161, 0.03) 100%);
  border-color: rgba(126, 203, 161, 0.25);
}

.delta-hero--up {
  background: linear-gradient(180deg, rgba(224, 122, 95, 0.12) 0%, rgba(224, 122, 95, 0.03) 100%);
  border-color: rgba(224, 122, 95, 0.25);
}

.delta-hero__arrow {
  font-size: 1.2rem;
  margin-bottom: var(--space-xs);
}

.delta-hero--down .delta-hero__arrow { color: var(--green); }
.delta-hero--up .delta-hero__arrow { color: var(--red); }

.delta-hero__value {
  font-family: var(--font-display);
  font-size: 3.5rem;
  line-height: 1;
  letter-spacing: -0.03em;
}

.delta-hero--down .delta-hero__value { color: var(--green); }
.delta-hero--up .delta-hero__value { color: var(--red); }

.delta-hero__unit {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 2px;
}

.delta-hero__pct {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 600;
  margin-top: var(--space-sm);
}

.delta-hero--down .delta-hero__pct { color: var(--green); }
.delta-hero--up .delta-hero__pct { color: var(--red); }

.delta-hero__label {
  font-family: var(--font-body);
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: var(--space-xs);
}

/* ---- Delta indicator (inline) ---- */
.delta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
  margin-top: var(--space-sm);
}

.delta--down {
  color: var(--green);
  background: rgba(126, 203, 161, 0.1);
}

.delta--up {
  color: var(--red);
  background: rgba(224, 122, 95, 0.1);
}

.delta__arrow {
  font-size: 0.7rem;
}

/* ---- Chart ---- */
.chart-section {
  margin-top: var(--space-xl);
  animation: cardIn 0.5s ease both;
  animation-delay: 0.15s;
}

.chart-section__title {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: var(--space-md);
}

.chart {
  background: var(--soil-800);
  border: 1px solid var(--soil-600);
  border-radius: var(--radius-lg);
  padding: var(--space-lg) var(--space-md);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.chart__bars {
  display: flex;
  align-items: flex-end;
  gap: 3px;
  height: 180px;
  min-width: fit-content;
}

.chart__bar-group {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xs);
  flex: 1;
  min-width: 18px;
}

.chart__bar-stack {
  display: flex;
  align-items: flex-end;
  gap: 2px;
  height: 150px;
  width: 100%;
}

.chart__bar {
  flex: 1;
  border-radius: 3px 3px 0 0;
  min-height: 2px;
  transition: height 0.4s cubic-bezier(0.22, 1, 0.36, 1);
  position: relative;
  cursor: default;
}

.chart__bar--furo1 {
  background: linear-gradient(180deg, var(--water-300), var(--water-600));
}

.chart__bar--furo2 {
  background: linear-gradient(180deg, var(--copper-300), var(--copper-500));
}

.chart__bar--compare {
  opacity: 0.35;
}

.chart__bar:hover {
  filter: brightness(1.2);
}

.chart__bar-tooltip {
  display: none;
  position: absolute;
  bottom: calc(100% + 6px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--soil-700);
  border: 1px solid var(--soil-500);
  border-radius: var(--radius-sm);
  padding: var(--space-xs) var(--space-sm);
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-primary);
  white-space: nowrap;
  z-index: 10;
  pointer-events: none;
}

.chart__bar:hover .chart__bar-tooltip {
  display: block;
}

.chart__bar-label {
  font-family: var(--font-mono);
  font-size: 0.55rem;
  color: var(--text-muted);
  writing-mode: horizontal-tb;
}

/* ---- Comparison section ---- */
.compare-section {
  margin-top: var(--space-xl);
}

.compare-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
}

.compare-period {
  background: var(--soil-800);
  border: 1px solid var(--soil-600);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  animation: cardIn 0.4s ease both;
}

.compare-period:nth-child(2) {
  animation-delay: 0.1s;
}

.compare-period__label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: var(--space-sm);
}

.compare-period__label--current {
  color: var(--water-400);
}

.compare-period__label--compare {
  color: var(--copper-300);
}

.compare-period__volume {
  font-family: var(--font-display);
  font-size: 1.8rem;
  color: var(--text-primary);
  line-height: 1;
}

.compare-period__unit {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-muted);
}

/* ---- Deltas row ---- */
.deltas {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
  margin-top: var(--space-md);
}

@media (min-width: 540px) {
  .deltas { grid-template-columns: 1fr 1fr; }
}

.delta-card {
  background: var(--soil-800);
  border: 1px solid var(--soil-600);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  text-align: center;
  animation: cardIn 0.4s ease both;
  animation-delay: 0.2s;
}

.delta-card__sensor {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: var(--space-sm);
}

.delta-card__value {
  font-family: var(--font-display);
  font-size: 2rem;
  line-height: 1;
}

.delta-card__value--up { color: var(--red); }
.delta-card__value--down { color: var(--green); }

.delta-card__pct {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  margin-top: var(--space-xs);
}

.delta-card__pct--up { color: var(--red); }
.delta-card__pct--down { color: var(--green); }

/* ---- Empty state ---- */
.empty {
  text-align: center;
  padding: var(--space-2xl);
  color: var(--text-muted);
}

.empty__icon {
  font-size: 2.5rem;
  margin-bottom: var(--space-md);
  opacity: 0.4;
}

.empty__text {
  font-size: 0.9rem;
}

/* ---- Error state ---- */
.error {
  text-align: center;
  padding: var(--space-xl);
  color: var(--red);
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

/* ---- Utilities ---- */
.hidden { display: none !important; }

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---- Scrollbar ---- */
::-webkit-scrollbar {
  height: 4px;
}

::-webkit-scrollbar-track {
  background: var(--soil-800);
}

::-webkit-scrollbar-thumb {
  background: var(--soil-500);
  border-radius: 2px;
}

/* ---- Responsive ---- */
@media (max-width: 380px) {
  .header { padding: var(--space-sm) var(--space-md); }
  .nav { padding: var(--space-sm) var(--space-md); }
  .main { padding: var(--space-md); }
  .card__volume { font-size: 2.4rem; }
  .nav__period { font-size: 1.15rem; min-width: 130px; }
}

@media (min-width: 768px) {
  .main { padding: var(--space-xl) var(--space-2xl); }
  .chart__bars { height: 220px; }
  .chart__bar-stack { height: 190px; }
}