:root {
  --bg: #08111f;
  --bg-soft: rgba(10, 24, 44, 0.76);
  --panel: rgba(13, 26, 46, 0.9);
  --panel-border: rgba(142, 179, 255, 0.12);
  --text: #eef4ff;
  --muted: #9cb1d0;
  --accent: #67e8f9;
  --accent-strong: #0ea5e9;
  --warm: #f59e0b;
  --success: #34d399;
  --shadow: 0 22px 60px rgba(0, 0, 0, 0.28);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(14, 165, 233, 0.22), transparent 30%),
    radial-gradient(circle at top right, rgba(245, 158, 11, 0.16), transparent 25%),
    linear-gradient(160deg, #040814 0%, #0a1628 52%, #09111c 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 36px 36px;
  mask-image: radial-gradient(circle at center, black, transparent 85%);
}

.page-shell {
  width: min(1280px, calc(100% - 32px));
  margin: 0 auto;
  padding: 32px 0 48px;
}

.hero {
  display: grid;
  grid-template-columns: 1.8fr 1fr;
  gap: 20px;
  align-items: stretch;
  margin-bottom: 24px;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.78rem;
}

h1, h2, h3 {
  font-family: Georgia, "Times New Roman", serif;
  margin: 0;
}

h1 {
  font-size: clamp(2rem, 4vw, 3.5rem);
  line-height: 0.98;
  max-width: 12ch;
}

.hero-copy,
.section-title p,
.status-card p {
  color: var(--muted);
  line-height: 1.65;
}

.hero-card,
.panel {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 24px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}

.hero-card {
  padding: 22px;
  display: grid;
  gap: 16px;
}

.metric {
  padding: 18px;
  border-radius: 18px;
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.05), rgba(103, 232, 249, 0.03));
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.metric-label {
  display: block;
  color: var(--muted);
  font-size: 0.9rem;
  margin-bottom: 6px;
}

.metric-value {
  font-size: 1.35rem;
  font-weight: 700;
}

.grid-layout {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.panel {
  padding: 22px;
}

.panel-wide {
  grid-column: 1 / -1;
}

.section-title {
  margin-bottom: 18px;
}

.section-title h2 {
  margin-bottom: 8px;
  font-size: 1.2rem;
}

.upload-box {
  position: relative;
  display: grid;
  gap: 8px;
  padding: 24px;
  border-radius: 20px;
  border: 1px dashed rgba(103, 232, 249, 0.45);
  background: rgba(8, 17, 31, 0.65);
  cursor: pointer;
  overflow: hidden;
}

.upload-box input {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

.upload-title {
  font-size: 1.05rem;
  font-weight: 700;
}

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

.sample-note {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.sample-note a {
  color: var(--accent);
  text-decoration: none;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 18px 0;
}

button,
select {
  font: inherit;
}

button {
  border: none;
  border-radius: 999px;
  padding: 12px 18px;
  font-weight: 700;
  color: #03111d;
  background: linear-gradient(135deg, var(--accent), #bae6fd);
  cursor: pointer;
  transition: transform 160ms ease, box-shadow 160ms ease, opacity 160ms ease;
  box-shadow: 0 12px 25px rgba(14, 165, 233, 0.24);
}

button:hover:not(:disabled) {
  transform: translateY(-1px);
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.45;
  box-shadow: none;
}

button.ghost {
  color: var(--text);
  background: rgba(255, 255, 255, 0.07);
  box-shadow: none;
}

button.accent {
  color: white;
  background: linear-gradient(135deg, var(--accent-strong), var(--success));
}

audio {
  width: 100%;
  filter: hue-rotate(155deg) saturate(1.2);
}

.chart {
  width: 100%;
  min-height: 320px;
  display: block;
  border-radius: 18px;
  overflow: hidden;
  background: rgba(6, 11, 22, 0.75);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.controls-panel {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.control-group {
  display: grid;
  gap: 10px;
}

.control-group label {
  font-weight: 700;
}

input[type="range"] {
  width: 100%;
  accent-color: var(--warm);
}

.control-meta {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  color: var(--muted);
  font-size: 0.95rem;
}

select {
  width: 100%;
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(8, 17, 31, 0.86);
  color: var(--text);
  padding: 12px 14px;
}

.status-card {
  padding: 18px;
  border-radius: 18px;
  background: linear-gradient(140deg, rgba(14, 165, 233, 0.12), rgba(52, 211, 153, 0.08));
  border: 1px solid rgba(255, 255, 255, 0.08);
}

@media (max-width: 980px) {
  .hero,
  .grid-layout {
    grid-template-columns: 1fr;
  }

  h1 {
    max-width: 100%;
  }
}

@media (max-width: 640px) {
  .page-shell {
    width: min(100% - 20px, 100%);
    padding-top: 20px;
  }

  .panel,
  .hero-card {
    padding: 18px;
  }

  .chart {
    min-height: 260px;
  }

  .control-meta {
    flex-direction: column;
  }
}