:root {
  --bg: #121212;
  --text: #e0e0e0;
  --card: #1e1e1e;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --muted: #888;
  --line: #2d2d2d;
  --highlight: #64ffda;
  --no-data-bg: #2b2b2b;
  --no-data-border: #ffcc00;
  --shadow: rgba(0,0,0,0.2);
}

/* === LIGHT THEME === */
.theme-light {
  --bg: #f1f5f9;
  --text: #1e293b;
  --card: #ffffff;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --muted: #64748b;
  --line: #e2e8f0;
  --highlight: #0f766e;
  --no-data-bg: #fffbea;
  --no-data-border: #facc15;
  --shadow: rgba(0,0,0,0.05);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: "Segoe UI", sans-serif;
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.6;
  padding: 0 1rem;
}

/* === Navigation === */
.main-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.2rem 1.5rem 0.8rem;
  flex-wrap: wrap;
  margin-bottom: 1rem;
  background: var(--card);
  border-bottom: 1px solid var(--line);
  box-shadow: 0 2px 8px var(--shadow);
}

.header-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.btn {
  display: inline-block;
  padding: 10px 16px;
  font-size: 14px;
  font-weight: 600;
  border-radius: 8px;
  text-decoration: none;
  cursor: pointer;
  transition: background 0.2s ease, transform 0.2s ease;
  box-shadow: 0 2px 6px var(--shadow);
  border: none;
}

.btn-primary {
  background-color: var(--accent);
  color: white;
}

.btn-primary:hover {
  background-color: var(--accent-hover);
  transform: translateY(-1px);
}

/* === Main === */
main {
  max-width: 960px;
  margin: 0 auto;
  padding-bottom: 3rem;
}

h1 {
  font-size: 1.8rem;
  margin-top: 1rem;
  margin-bottom: 0.5rem;
  text-align: center;
}

.intro {
  text-align: center;
  font-size: 0.95rem;
  color: var(--muted);
  margin-bottom: 2rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* === KPIs === */
.kpis {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin-bottom: 2rem;
}

.kpi {
  background-color: var(--card);
  padding: 1rem;
  border-radius: 10px;
  border: 1px solid var(--line);
  text-align: center;
  transition: 0.3s ease-in-out;
  box-shadow: 0 2px 6px var(--shadow);
}

.kpi:hover {
  transform: translateY(-2px);
  border-color: var(--accent-hover);
}

.kpi h3 {
  font-size: 1rem;
  margin-bottom: 0.3rem;
  color: var(--text);
}

.kpi p {
  font-size: 1.4rem;
  font-weight: bold;
  margin-bottom: 0.2rem;
  color: var(--highlight);
}

.kpi small {
  font-size: 0.8rem;
  color: var(--muted);
}

/* === Bar Chart === */
.bar-chart {
  background-color: var(--card);
  padding: 1.2rem;
  border-radius: 10px;
  border: 1px solid var(--line);
}

.bar-chart h2 {
  text-align: center;
  margin-bottom: 1.5rem;
  font-size: 1.2rem;
}

.bar-wrapper {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  margin: 0 10px;
}

.bar {
  width: 36px;
  background: linear-gradient(to top, #00bcd4, var(--highlight));
  border-radius: 6px 6px 0 0;
  transition: height 0.5s ease;
  margin-bottom: 0.4rem;
}

.bar-wrapper span {
  font-size: 0.85rem;
  color: var(--muted);
}

/* === No Data === */
.no-data {
  background: var(--no-data-bg);
  color: var(--no-data-border);
  padding: 1rem;
  border-radius: 8px;
  margin-top: 2rem;
  border: 1px dashed var(--no-data-border);
  text-align: center;
  font-size: 0.95rem;
}

/* === Inputs & Buttons (global) === */
input,
textarea,
select {
  background-color: var(--card);
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 8px 12px;
  font-size: 14px;
  transition: border 0.2s, background 0.2s;
  width: 100%;
  box-sizing: border-box;
}

input:focus,
textarea:focus,
select:focus {
  border-color: var(--accent);
  outline: none;
  background-color: var(--bg);
}

button {
  background-color: var(--accent);
  color: white;
  border: none;
  padding: 8px 16px;
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.2s ease;
}

button:hover {
  background-color: var(--accent-hover);
}

/* === Responsive === */
@media (min-width: 900px) {
  .kpis {
    grid-template-columns: repeat(3, 1fr);
  }

  .bar-chart {
    text-align: center;
  }
  .header-actions {
    flex-direction: column;
    align-items: flex-start;
  }

  .header-actions .btn {
    width: 100%;
    text-align: center;
  }
}