/* main.css */

:root {
  --color-bg:           #f5f5f5;
  --color-surface:      #fff;
  --color-surface-alt:  #fafafa;
  --color-border:       #e5e5e5;
  --color-border-light: #f0f0f0;
  --color-text:         #1a1a1a;
  --color-text-muted:   #666;
  --color-text-subtle:  #999;
  --color-text-faint:   #aaa;
  --color-accent:       #1a1a1a;
  --color-accent-hover: #333;
  --color-error:        #dc2626;
  --radius-sm:          6px;
  --radius-md:          8px;
  --spacing-sm:         8px;
  --spacing-md:         16px;
  --spacing-lg:         32px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: system-ui, sans-serif; background: var(--color-bg); color: var(--color-text); }

/* Header */
/* Navigatie */
.main-nav {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 0 var(--spacing-lg);
  display: flex;
}

.main-nav button {
  padding: 14px var(--spacing-md);
  border: none;
  background: none;
  font-size: 14px;
  cursor: pointer;
  color: var(--color-text-muted);
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
}

.main-nav button.active {
  color: var(--color-text);
  border-bottom-color: var(--color-accent);
  font-weight: 500;
}

.sub-nav {
  background: var(--color-surface-alt);
  border-bottom: 1px solid var(--color-border);
  padding: 0 var(--spacing-lg);
  display: flex;
  flex-wrap: wrap;
}

.sub-nav button {
  padding: 10px 14px;
  border: none;
  background: none;
  font-size: 13px;
  cursor: pointer;
  color: var(--color-text-subtle);
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
}

.sub-nav button.active {
  color: var(--color-text);
  border-bottom-color: var(--color-accent);
  font-weight: 500;
}

/* Globale filterbar */
.global-filter {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 24px;
  overflow: hidden;
}

/* Rij 1: datum */
.filter-date-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 20px;
  border-bottom: 1px solid var(--color-border-light);
}

.filter-date-row label {
  font-size: 11px;
  color: var(--color-text-subtle);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  white-space: nowrap;
}

.filter-date-row input[type="date"] {
  padding: 6px 10px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 13px;
  color: var(--color-text);
  background: var(--color-surface);
}


/* Rij 2: GA4 filters */
.filter-ga4-row {
  display: flex;
  align-items: flex-end;
  gap: 12px;
  padding: 12px 20px;
  background: var(--color-surface-alt);
  flex-wrap: nowrap;
}

.filter-field {
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex: 1;
  min-width: 0;
}

.filter-field label {
  font-size: 10px;
  color: var(--color-text-faint);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  white-space: nowrap;
}

.filter-field select {
  width: 100%;
  padding: 6px var(--spacing-sm);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 13px;
  background: var(--color-surface);
  color: var(--color-text);
  cursor: pointer;
  min-width: 0;
}

.filter-field--reset {
  flex: 0 0 auto;
}

#gfReset {
  padding: 6px 14px;
  background: var(--color-surface);
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 13px;
  cursor: pointer;
  white-space: nowrap;
}

#gfReset:hover { background: var(--color-border-light); }

/* Main */
main {
  padding: var(--spacing-lg);
  max-width: 1400px;
  margin: 0 auto;
}

.tab-content { display: none; }
.tab-content.active { display: block; }

.loading {
  color: var(--color-text-subtle);
  font-size: 14px;
  padding: 48px;
  text-align: center;
}

.error {
  color: var(--color-error);
  font-size: 14px;
  padding: var(--spacing-md);
}