/*
 * FCOS Charts — Pure CSS Chart Components
 * Usage: <link rel="stylesheet" href="fcos-charts.css">
 * Requires: fcos-ui.css (for CSS variables)
 * No JavaScript needed — just classes and CSS variables.
 * Version: 1.0.0
 */


/* ==========================================================================
   1. BAR CHARTS
   ========================================================================== */

.chart-bar {
  display: flex;
  gap: 12px;
  align-items: flex-end;
  padding: 16px 0;
  min-height: 160px;
}

/* Vertical bars (default) */
.chart-bar, .chart-bar-v {
  flex-direction: row;
  align-items: flex-end;
}

.chart-bar .bar, .chart-bar-v .bar {
  flex: 1;
  min-width: 24px;
  max-width: 64px;
  height: calc(var(--value, 0) * 1%);
  background: var(--accent);
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  position: relative;
  animation: fcos-bar-grow-v 0.6s ease forwards;
  transform-origin: bottom;
}

.chart-bar .bar::after, .chart-bar-v .bar::after {
  content: attr(data-label);
  position: absolute;
  bottom: -24px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 11px;
  font-weight: 550;
  color: var(--text-m);
  white-space: nowrap;
}

@keyframes fcos-bar-grow-v {
  from { height: 0; }
  to   { height: calc(var(--value, 0) * 1%); }
}

/* Horizontal bars */
.chart-bar-h {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 16px 0;
  min-height: auto;
}

.chart-bar-h .bar {
  width: calc(var(--value, 0) * 1%);
  height: 28px;
  background: var(--accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  position: relative;
  animation: fcos-bar-grow-h 0.6s ease forwards;
}

.chart-bar-h .bar::after {
  content: attr(data-label);
  position: absolute;
  left: 8px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 11px;
  font-weight: 550;
  color: var(--bg);
  white-space: nowrap;
}

@keyframes fcos-bar-grow-h {
  from { width: 0; }
  to   { width: calc(var(--value, 0) * 1%); }
}

/* Bar color variants */
.bar-success { background: var(--success) !important; }
.bar-danger  { background: var(--danger) !important; }
.bar-info    { background: var(--info) !important; }
.bar-warning { background: var(--warning) !important; }


/* ==========================================================================
   2. DONUT / PIE CHARTS
   ========================================================================== */

.chart-donut {
  --c1: var(--accent);
  --c2: var(--success);
  --c3: var(--info);
  --c4: var(--warning);
  --c5: var(--danger);
  --c6: var(--text-m);
  --v1: 0; --v2: 0; --v3: 0; --v4: 0; --v5: 0; --v6: 0;

  width: 120px;
  height: 120px;
  border-radius: 50%;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  background: conic-gradient(
    var(--c1) 0% calc(var(--v1) * 1%),
    var(--c2) calc(var(--v1) * 1%) calc((var(--v1) + var(--v2)) * 1%),
    var(--c3) calc((var(--v1) + var(--v2)) * 1%) calc((var(--v1) + var(--v2) + var(--v3)) * 1%),
    var(--c4) calc((var(--v1) + var(--v2) + var(--v3)) * 1%) calc((var(--v1) + var(--v2) + var(--v3) + var(--v4)) * 1%),
    var(--c5) calc((var(--v1) + var(--v2) + var(--v3) + var(--v4)) * 1%) calc((var(--v1) + var(--v2) + var(--v3) + var(--v4) + var(--v5)) * 1%),
    var(--c6) calc((var(--v1) + var(--v2) + var(--v3) + var(--v4) + var(--v5)) * 1%) calc((var(--v1) + var(--v2) + var(--v3) + var(--v4) + var(--v5) + var(--v6)) * 1%),
    transparent calc((var(--v1) + var(--v2) + var(--v3) + var(--v4) + var(--v5) + var(--v6)) * 1%) 100%
  );
}

.chart-donut::after {
  content: '';
  position: absolute;
  width: 60%;
  height: 60%;
  border-radius: 50%;
  background: var(--bg);
}

.donut-label {
  position: relative;
  z-index: 1;
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
}

/* Size variants */
.chart-donut-sm { width: 80px; height: 80px; }
.chart-donut-sm .donut-label { font-size: 13px; }

.chart-donut-lg { width: 160px; height: 160px; }
.chart-donut-lg .donut-label { font-size: 24px; }


/* ==========================================================================
   3. PROGRESS RINGS
   ========================================================================== */

.chart-ring {
  --size: 80px;
  --ring-color: var(--accent);
  --ring-bg: var(--border);
  --ring-width: 6px;

  width: var(--size);
  height: var(--size);
  border-radius: 50%;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  background: conic-gradient(
    var(--ring-color) 0% calc(var(--value, 0) * 1%),
    var(--ring-bg) calc(var(--value, 0) * 1%) 100%
  );
  animation: fcos-ring-fill 1s ease forwards;
}

.chart-ring::after {
  content: '';
  position: absolute;
  width: calc(100% - var(--ring-width) * 2);
  height: calc(100% - var(--ring-width) * 2);
  border-radius: 50%;
  background: var(--bg);
}

.ring-value {
  position: relative;
  z-index: 1;
  font-size: calc(var(--size) * 0.22);
  font-weight: 700;
  color: var(--text);
}

@keyframes fcos-ring-fill {
  from {
    background: conic-gradient(
      var(--ring-color) 0% 0%,
      var(--ring-bg) 0% 100%
    );
  }
}


/* ==========================================================================
   4. SPARKLINES
   ========================================================================== */

.sparkline {
  display: inline-block;
  height: 24px;
  width: 100%;
  min-width: 60px;
  background: linear-gradient(
    to right,
    var(--accent) 0%, var(--accent) 14%,
    transparent 14%, transparent 15%,
    var(--accent) 15%, var(--accent) 28%,
    transparent 28%, transparent 29%,
    var(--accent) 29%, var(--accent) 42%,
    transparent 42%, transparent 43%,
    var(--accent) 43%, var(--accent) 57%,
    transparent 57%, transparent 58%,
    var(--accent) 58%, var(--accent) 71%,
    transparent 71%, transparent 72%,
    var(--accent) 72%, var(--accent) 85%,
    transparent 85%, transparent 86%,
    var(--accent) 86%, var(--accent) 100%
  );
  background-size: 100% 100%;
  mask-image: linear-gradient(
    to right,
    transparent 0%,
    transparent 0%
  );
  -webkit-mask-image: linear-gradient(
    to right,
    transparent 0%,
    transparent 0%
  );
  border-radius: 2px;
  vertical-align: middle;
  opacity: 0.7;
  background: var(--accent-light);
  border-bottom: 2px solid var(--accent);
  position: relative;
  overflow: hidden;
}

.sparkline::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    90deg,
    transparent 0%,
    var(--accent-light) 50%,
    transparent 100%
  );
  background-size: 200% 100%;
  animation: fcos-sparkline-shimmer 2s ease infinite;
}

@keyframes fcos-sparkline-shimmer {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}


/* ==========================================================================
   5. STAT CARDS
   ========================================================================== */

.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.stat-card:hover {
  border-color: var(--border-s);
  box-shadow: var(--shadow-glow);
}

.stat-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-m);
}

.stat-value {
  font-size: 28px;
  font-weight: 750;
  letter-spacing: -0.02em;
  color: var(--text);
  line-height: 1.2;
}

.stat-change {
  font-size: 12px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.stat-change.up {
  color: var(--success);
}

.stat-change.up::before {
  content: '\25B2';
  font-size: 8px;
}

.stat-change.down {
  color: var(--danger);
}

.stat-change.down::before {
  content: '\25BC';
  font-size: 8px;
}

.stat-card .sparkline {
  margin-top: 12px;
}


/* ==========================================================================
   6. CHART LEGEND
   ========================================================================== */

.chart-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  padding: 8px 0;
}

.legend-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 550;
  color: var(--text-s);
}

.legend-item::before {
  content: '';
  width: 10px;
  height: 10px;
  border-radius: 2px;
  background: var(--color, var(--accent));
}


/* ==========================================================================
   7. RESPONSIVE
   ========================================================================== */

@media (max-width: 768px) {
  .chart-bar-h .bar::after {
    left: auto;
    right: 8px;
  }

  .chart-bar, .chart-bar-v {
    min-height: 120px;
  }

  .stat-value {
    font-size: 22px;
  }

  .chart-legend {
    gap: 10px;
  }
}

@media (max-width: 480px) {
  .chart-bar, .chart-bar-v {
    flex-wrap: wrap;
    min-height: auto;
  }

  .chart-bar .bar, .chart-bar-v .bar {
    max-width: none;
    min-width: 0;
  }

  .stat-card {
    padding: 14px;
  }

  .stat-value {
    font-size: 20px;
  }
}