:root {
  --bg: #ebedf0;
  --card: #ffffff;
  --shadow: 0 4px 20px rgba(15, 23, 42, 0.08);
  --shadow-soft: 0 2px 12px rgba(15, 23, 42, 0.06);
  --radius: 16px;
  --radius-sm: 12px;
  --text: #1c1c1e;
  --text-secondary: #636366;
  --accent: #007aff;
  --water: linear-gradient(180deg, #5eb3ff 0%, #1e88e5 45%, #1565c0 100%);
  --tank-border: rgba(0, 0, 0, 0.08);
  --rele-on: #34c759;
  --rele-off: #8e8e93;
  --danger: #ff3b30;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  height: 100%;
}

body {
  margin: 0;
  min-height: 100%;
  min-height: 100dvh;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
}

.hidden {
  display: none !important;
}

.app {
  max-width: 430px;
  margin: 0 auto;
  padding: 12px 16px 28px;
}

.top-bar {
  position: relative;
  text-align: center;
  padding: 8px 0 16px;
  padding-right: 4.5rem;
  padding-left: 4.5rem;
}

.btn-logout {
  position: absolute;
  top: 4px;
  right: 0;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin: 0;
  padding: 8px 10px;
  border: none;
  border-radius: var(--radius-sm);
  background: rgba(0, 0, 0, 0.05);
  color: var(--text-secondary);
  font: inherit;
  font-size: 0.8125rem;
  font-weight: 600;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.btn-logout:active {
  background: rgba(0, 0, 0, 0.09);
}

.btn-logout-icon {
  flex-shrink: 0;
  display: block;
}

.btn-logout-label {
  line-height: 1;
}

.title {
  margin: 0;
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.site-meta {
  margin: 4px 0 0;
  font-size: 0.8125rem;
  color: var(--text-secondary);
  font-weight: 500;
  line-height: 1.35;
}

.site-meta.hidden {
  display: none;
}

.equipment-label {
  margin: 6px 0 0;
  font-size: 0.875rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.equipment-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 6px 8px;
}

.equipment-prefix {
  flex-shrink: 0;
}

.equipment-select {
  margin: 0;
  max-width: min(100%, 240px);
  padding: 6px 28px 6px 10px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(0, 0, 0, 0.12);
  background-color: var(--card);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23636366' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  font: inherit;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text);
  cursor: pointer;
  -webkit-appearance: none;
  appearance: none;
}

.equipment-static {
  font-weight: 600;
  color: var(--text);
}

.main {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.card {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
  border: 1px solid rgba(0, 0, 0, 0.04);
}

.tank-card {
  padding: 20px 12px 24px;
}

.tank-wrap {
  display: flex;
  align-items: stretch;
  justify-content: center;
  gap: 10px;
  max-width: 280px;
  margin: 0 auto;
}

.scale {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  font-size: 0.65rem;
  color: var(--text-secondary);
  padding: 28px 0 22px;
  min-width: 2.25rem;
  text-align: right;
}

.scale-right {
  min-width: 0.5rem;
}

.tank-cylinder {
  flex: 0 0 auto;
  width: 120px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.tank-rim {
  width: 100%;
  height: 14px;
  border-radius: 50%;
  background: linear-gradient(180deg, #f5f5f7 0%, #e5e5ea 100%);
  border: 1px solid var(--tank-border);
  box-shadow: inset 0 1px 2px rgba(255, 255, 255, 0.9);
}

.tank-rim-top {
  margin-bottom: -7px;
  z-index: 2;
  position: relative;
}

.tank-rim-bottom {
  margin-top: -7px;
  z-index: 1;
  background: linear-gradient(180deg, #e5e5ea 0%, #d1d1d6 100%);
}

.tank-body {
  position: relative;
  width: 100%;
  height: 220px;
  background: linear-gradient(90deg, #ececf0 0%, #f9f9fb 35%, #ececf0 100%);
  border-left: 2px solid var(--tank-border);
  border-right: 2px solid var(--tank-border);
  border-radius: 0;
  overflow: hidden;
  box-shadow: inset 0 0 12px rgba(0, 0, 0, 0.04);
}

.tank-shine {
  position: absolute;
  top: 0;
  left: 8%;
  width: 22%;
  height: 100%;
  background: linear-gradient(90deg, rgba(255, 255, 255, 0.45), transparent);
  pointer-events: none;
  z-index: 2;
}

.water {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: var(--level, 0%);
  background: var(--water);
  transition: height 0.65s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 1;
  box-shadow: inset 0 8px 16px rgba(255, 255, 255, 0.25);
}

.water::after {
  content: "";
  position: absolute;
  top: -6px;
  left: 0;
  right: 0;
  height: 12px;
  border-radius: 50%;
  background: rgba(94, 179, 255, 0.95);
  filter: brightness(1.05);
}

.water.water--alarm {
  background: linear-gradient(180deg, #ff8a80 0%, #e53935 45%, #b71c1c 100%);
  box-shadow: inset 0 8px 16px rgba(255, 255, 255, 0.2);
}

.water.water--alarm::after {
  background: rgba(229, 57, 53, 0.95);
  filter: brightness(1.02);
}

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

.metric {
  padding: 14px 12px;
  text-align: center;
}

.metric-label {
  margin: 0 0 6px;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--text-secondary);
}

.metric-value {
  margin: 0;
  font-size: 1.35rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.metric-value .unit {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-left: 4px;
}

.rele.rele-on,
.metric-value.rele-on {
  color: var(--rele-on);
}

.rele.rele-off,
.metric-value.rele-off {
  color: var(--rele-off);
}

.section-log,
.section-alarmas {
  padding: 16px 16px 18px;
}

.section-title {
  margin: 0 0 12px;
  font-size: 0.95rem;
  font-weight: 600;
}

.log-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 0;
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
  font-size: 0.95rem;
}

.log-row:last-of-type {
  border-bottom: none;
}

.log-label {
  color: var(--text-secondary);
  font-weight: 500;
}

.log-value {
  font-variant-numeric: tabular-nums;
  font-weight: 600;
}

.log-status {
  margin: 12px 0 0;
  font-size: 0.8rem;
  color: var(--text-secondary);
  min-height: 1.2em;
}

.log-status.log-status--warn {
  color: var(--danger);
  font-weight: 600;
}

.log-mensaje-row .log-mensaje-value {
  text-align: right;
  font-weight: 600;
  color: #c2410c;
  max-width: 65%;
  word-break: break-word;
}

.alarmas-list {
  margin: 0;
  padding-left: 1.1rem;
  color: var(--danger);
  font-size: 0.9rem;
}

.alarmas-list li {
  margin-bottom: 6px;
}

.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.35);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  z-index: 100;
}

.modal {
  position: fixed;
  inset: 0;
  z-index: 101;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  pointer-events: none;
}

.modal-card {
  pointer-events: auto;
  width: 100%;
  max-width: 360px;
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px 22px 26px;
  border: 1px solid rgba(0, 0, 0, 0.06);
}

.modal-title {
  margin: 0 0 8px;
  font-size: 1.25rem;
  font-weight: 600;
  text-align: center;
}

.modal-sub {
  margin: 0 0 20px;
  font-size: 0.875rem;
  color: var(--text-secondary);
  text-align: center;
  line-height: 1.4;
}

.login-form {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.login-error {
  margin: 0;
  padding: 10px 12px;
  font-size: 0.8125rem;
  line-height: 1.35;
  color: #fff;
  background: var(--danger);
  border-radius: var(--radius-sm);
}

.login-error.hidden {
  display: none;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.field-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.field input {
  width: 100%;
  padding: 12px 14px;
  font-size: 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(0, 0, 0, 0.12);
  background: #f9f9fb;
  -webkit-appearance: none;
  appearance: none;
}

.field input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.2);
  background: #fff;
}

.btn-primary {
  margin-top: 8px;
  padding: 14px;
  font-size: 1rem;
  font-weight: 600;
  color: #fff;
  background: var(--accent);
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.btn-primary:active {
  opacity: 0.88;
}