:root {
  --accent-up: #00e676;
  --accent-down: #ff5252;
  --accent-equal: #00b0ff;
  --text-dark: #0a0a0a;
  --text-muted: #333;
}

body {
  margin: 0;
  font-family: system-ui, sans-serif;
  background: linear-gradient(rgba(255,255,255,0.55), rgba(255,255,255,0.55)),
              url('../afbeelding/padelkooi2.jpg') center/cover fixed no-repeat;
}

.page-wrap {
  min-height: 100vh;
  display: flex;
  justify-content: center;
  padding: 20px 12px;
}

.content {
  width: 100%;
  max-width: 900px;
  background: rgba(255,255,255,0.65);
  backdrop-filter: blur(8px);
  border-radius: 18px;
  padding: 20px;
  border: 1px solid rgba(0,0,0,0.1);
}

header {
  text-align: center;
  margin-bottom: 30px; /* extra ruimte */
}

header h1 {
  margin: 0;
  font-size: 1.6rem;
  color: var(--text-dark);
}

.subtitle {
  margin-top: 4px;
  color: var(--text-muted);
}

/* Grafieken */

.chart-card {
  background: rgba(255,255,255,0.7);
  border-radius: 14px;
  padding: 12px 14px;
  border: 1px solid rgba(0,0,0,0.1);
  margin-bottom: 14px;
}

.chart-card h2 {
  margin: 0 0 6px 0;
  font-size: 1rem;
  color: var(--text-dark);
}

.chart-card canvas {
  width: 100%;
  height: 110px !important;
}

.updated {
  margin-top: 14px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.error {
  margin-top: 10px;
  color: var(--accent-down);
}

.back-btn {
    background: linear-gradient(135deg, #003366, #7EC8FF);
    border: 2px solid white;
    color: white;
    padding: 10px 25px;
    border-radius: 40px;
    text-decoration: none;
    font-weight: bold;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    box-shadow: 0 4px 15px rgba(0,51,102,0.35);
    backdrop-filter: blur(5px);
    transition: 0.3s ease;

    display: block;      /* <<< FIX */
    margin: 0 auto;      /* <<< FIX */
	max-width: fit-content;  /* <<< FIX: knop blijft klein */
    text-align: center;  /* blijft prima */
}