:root {
  --bg: #f3f6fb;
  --bg-soft: #ecf2fa;
  --panel: rgba(255, 255, 255, 0.84);
  --panel-strong: #ffffff;
  --panel-border: #d7e2f0;
  --text: #1f2b3d;
  --muted: #60728f;
  --accent: #3e8cc5;
  --accent-strong: #2f75b0;
  --chart-text: #4f627b;
  --chart-grid: rgba(93, 118, 149, 0.2);
  --fatal: #4c79c4;
  --non-fatal: #7b6fd1;
  --anr: #df8b4a;
  --up: #cf5d5d;
  --down: #3b9771;
  --danger: #b14f5b;
}

* {
  box-sizing: border-box;
}

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

body {
  font-family: 'Space Grotesk', 'Noto Sans SC', sans-serif;
  color: var(--text);
  background: radial-gradient(1000px 540px at -5% 0%, rgba(136, 178, 225, 0.22) 0%, transparent 65%),
    radial-gradient(860px 560px at 100% 100%, rgba(132, 199, 177, 0.2) 0%, transparent 64%),
    linear-gradient(180deg, #f8fbff 0%, var(--bg) 100%);
}

.backdrop {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(560px 260px at 20% 10%, rgba(92, 141, 194, 0.08), transparent 70%),
    radial-gradient(640px 300px at 80% 80%, rgba(64, 156, 129, 0.07), transparent 72%);
}

.container {
  position: relative;
  max-width: 1240px;
  margin: 0 auto;
  padding: 24px;
}

.hidden {
  display: none;
}

.auth-panel {
  max-width: 460px;
  margin: 12vh auto 0;
  padding: 28px;
  border-radius: 18px;
  border: 1px solid var(--panel-border);
  background: var(--panel);
  backdrop-filter: blur(10px);
  box-shadow: 0 18px 48px rgba(52, 83, 124, 0.14);
}

.auth-panel h2 {
  margin: 0;
  font-size: 24px;
}

.auth-subtitle {
  margin: 8px 0 20px;
  color: var(--muted);
}

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

.auth-hint {
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.auth-hint.error {
  color: var(--danger);
}

.hero {
  margin-bottom: 18px;
  display: flex;
  gap: 14px;
  justify-content: space-between;
  align-items: flex-start;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.current-user {
  color: var(--muted);
  font-size: 13px;
}

.tag {
  margin: 0;
  color: var(--accent);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 700;
  font-size: 12px;
}

h1 {
  margin: 8px 0;
  font-size: clamp(28px, 4vw, 42px);
}

.subtitle {
  margin: 0;
  color: var(--muted);
}

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: end;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 16px;
  padding: 16px;
  box-shadow: 0 12px 28px rgba(38, 70, 109, 0.08);
  backdrop-filter: blur(7px);
}

label {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-size: 14px;
}

input,
button {
  font: inherit;
  border-radius: 10px;
  border: 1px solid var(--panel-border);
  background: var(--panel-strong);
  color: var(--text);
  padding: 10px 12px;
}

input {
  min-height: 42px;
}

button {
  cursor: pointer;
  transition: transform 0.15s ease, opacity 0.15s ease, box-shadow 0.2s ease;
}

button:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(36, 72, 121, 0.16);
}

button:disabled {
  opacity: 0.62;
  cursor: not-allowed;
  box-shadow: none;
  transform: none;
}

.primary {
  background: linear-gradient(135deg, #5ca4d6, var(--accent));
  border: 1px solid #5098cb;
  color: #ffffff;
}

.ghost {
  background: #eef4fb;
  color: #3b4f6b;
}

.quick-range-group {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-right: 2px;
}

.range-btn {
  padding: 9px 12px;
  border-radius: 999px;
  background: #f2f6fc;
  color: #536581;
}

.range-btn.active {
  border-color: #96b6d4;
  background: #e2edf9;
  color: #345b82;
}

.status {
  margin: 16px 0;
  color: var(--muted);
}

.status.error {
  color: var(--danger);
}

.reports-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.section-title {
  margin: 10px 0 0;
  font-size: 20px;
  color: #2a405d;
}

.card {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 16px;
  padding: 16px;
  min-height: 420px;
  animation: appear 0.35s ease both;
  box-shadow: 0 14px 30px rgba(30, 55, 86, 0.1);
}

.card h3 {
  font-size: 18px;
  margin: 0 0 6px;
}

.card p {
  margin: 0 0 12px;
  color: var(--muted);
  font-size: 13px;
}

.card-meta {
  margin-bottom: 10px;
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  margin-bottom: 14px;
}

.metrics-grid-single {
  grid-template-columns: 1fr;
}

.metric-card {
  background: #f8fbff;
  border: 1px solid #dbe6f4;
  border-radius: 10px;
  padding: 10px;
}

.metric-label {
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 2px;
}

.metric-value {
  font-size: 24px;
  line-height: 1.1;
  font-weight: 700;
  margin-bottom: 4px;
}

.metric-change {
  font-size: 12px;
  font-weight: 600;
}

.trend-up {
  color: var(--up);
}

.trend-down {
  color: var(--down);
}

.trend-flat {
  color: var(--muted);
}

.canvas-wrap {
  height: 230px;
}

.empty {
  height: 100%;
  display: grid;
  place-items: center;
  color: var(--muted);
}

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

@media (max-width: 840px) {
  .hero {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 700px) {
  .container {
    padding: 16px;
  }

  .auth-panel {
    margin-top: 7vh;
    padding: 20px;
  }

  .card {
    min-height: 380px;
  }

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

  .canvas-wrap {
    height: 210px;
  }

  .quick-range-group {
    width: 100%;
  }

  .range-btn {
    flex: 1 1 calc(50% - 8px);
    text-align: center;
  }
}