:root {
  --bg-1: #f4f8ff;
  --bg-2: #e4fff3;
  --ink-1: #0b1324;
  --ink-2: #24324d;
  --border: rgba(24, 44, 78, 0.12);
  --glass: rgba(255, 255, 255, 0.72);
  --accent: #00684a;
  --accent-2: #0f52ba;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Segoe UI", "Trebuchet MS", sans-serif;
  color: var(--ink-1);
  background: radial-gradient(circle at 15% 20%, var(--bg-2), transparent 50%),
    radial-gradient(circle at 85% 10%, #f8f2e7, transparent 45%),
    linear-gradient(130deg, var(--bg-1), #f3f7ff 65%, #eef9ff);
  min-height: 100vh;
}

.bg-layer {
  position: fixed;
  inset: 0;
  background-image: linear-gradient(transparent 96%, rgba(22, 34, 63, 0.04) 96%),
    linear-gradient(90deg, transparent 96%, rgba(22, 34, 63, 0.04) 96%);
  background-size: 30px 30px;
  pointer-events: none;
}

.app-shell {
  position: relative;
  max-width: 1280px;
  margin: 0 auto;
  padding: 20px;
  display: grid;
  gap: 18px;
}

.glass.panel {
  border: 1px solid var(--border);
  border-radius: 18px;
  background: var(--glass);
  backdrop-filter: blur(10px);
  box-shadow: 0 20px 48px rgba(15, 36, 63, 0.12);
  padding: 16px;
}

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

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.09em;
  font-size: 12px;
  color: #215e49;
  margin: 0;
}

h1 { margin: 8px 0; }
h2 { margin: 8px 0 14px; }
.subtitle { margin: 0; color: var(--ink-2); }

.session-box {
  text-align: right;
  display: grid;
  gap: 8px;
}

.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 10px;
}

.metric {
  padding: 12px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.75);
  border: 1px solid var(--border);
}

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

.metric .value {
  font-size: 26px;
  font-weight: 700;
}

.tab-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tab {
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.7);
  padding: 10px 14px;
  border-radius: 999px;
  color: var(--ink-2);
  cursor: pointer;
}

.tab.is-active {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
}

.tab-panel { display: none; gap: 12px; }
.tab-panel.is-active { display: grid; }

.inline-form {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: end;
  margin-bottom: 12px;
}

label { display: grid; gap: 5px; font-size: 13px; color: var(--ink-2); }
input, select, textarea {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 9px;
  font: inherit;
  min-width: 170px;
  background: rgba(255, 255, 255, 0.95);
}

textarea { width: 100%; min-height: 170px; }

.btn {
  border: none;
  border-radius: 10px;
  padding: 10px 14px;
  color: #fff;
  background: linear-gradient(130deg, var(--accent), var(--accent-2));
  cursor: pointer;
}

.btn.secondary {
  background: #e9eef8;
  color: #0f2a52;
  border: 1px solid rgba(18, 44, 84, 0.16);
}

.result-box {
  background: rgba(10, 20, 38, 0.9);
  color: #d4ebff;
  border-radius: 12px;
  padding: 12px;
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  background: rgba(255, 255, 255, 0.86);
  border-radius: 10px;
  overflow: hidden;
}

th, td {
  text-align: left;
  padding: 8px;
  border-bottom: 1px solid rgba(15, 38, 72, 0.1);
  font-size: 13px;
}

@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; display: grid; }
  .session-box { text-align: left; }
}