/* =========================================================================
 * v5.0 Sprint 4 — Typography Tokens & Design System
 * Defines consistent type scale, color tokens, spacing, shadows
 * Applied via CSS variables for global theming
 * =======================================================================*/

:root {
  /* ─── Type Scale (modular 1.25 ratio) ──────────────────────────── */
  --fs-xs:    11px;    /* badges, labels, table footers */
  --fs-sm:    12px;    /* secondary text, captions */
  --fs-base:  13px;    /* body text */
  --fs-md:    14px;    /* table headers, emphasis */
  --fs-lg:    16px;    /* card titles, h4 */
  --fs-xl:    20px;    /* section h3 */
  --fs-2xl:   24px;    /* page h2 */
  --fs-3xl:   30px;    /* hero numbers (KPI cards) */
  --fs-display: 36px;  /* dashboard hero */

  /* ─── Font Weights ─────────────────────────────────────────────── */
  --fw-regular: 400;
  --fw-medium:  500;
  --fw-semi:    600;
  --fw-bold:    700;
  --fw-extra:   800;

  /* ─── Line Heights ─────────────────────────────────────────────── */
  --lh-tight:  1.2;
  --lh-snug:   1.35;
  --lh-normal: 1.5;
  --lh-relaxed:1.65;

  /* ─── Color Tokens ─────────────────────────────────────────────── */
  --color-primary:    #1F4E79;
  --color-primary-50: #eff6ff;
  --color-primary-100:#dbeafe;
  --color-primary-200:#bfdbfe;
  --color-secondary:  #0ea5e9;
  --color-success:    #16a34a;
  --color-warning:    #f59e0b;
  --color-danger:     #dc2626;
  --color-info:       #06b6d4;

  --color-text-1: #0f172a;  /* primary text */
  --color-text-2: #334155;  /* body text */
  --color-text-3: #64748b;  /* muted */
  --color-text-4: #94a3b8;  /* placeholder */

  --color-border:  #e2e8f0;
  --color-bg-1:    #ffffff;
  --color-bg-2:    #f8fafc;
  --color-bg-3:    #f1f5f9;

  /* ─── Spacing Scale ────────────────────────────────────────────── */
  --sp-1: 4px;
  --sp-2: 8px;
  --sp-3: 12px;
  --sp-4: 16px;
  --sp-5: 20px;
  --sp-6: 24px;
  --sp-8: 32px;
  --sp-10: 40px;

  /* ─── Border Radius ────────────────────────────────────────────── */
  --rd-sm: 6px;
  --rd-md: 8px;
  --rd-lg: 10px;
  --rd-xl: 12px;
  --rd-2xl: 16px;
  --rd-full: 9999px;

  /* ─── Shadows ──────────────────────────────────────────────────── */
  --sh-sm: 0 1px 2px rgba(0,0,0,.06);
  --sh-md: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.06);
  --sh-lg: 0 4px 12px rgba(0,0,0,.1);
  --sh-xl: 0 10px 24px rgba(0,0,0,.15);
}

/* ─── Utility classes (Sprint 4 — for new components only) ───────── */
.sp4-h1 { font-size: var(--fs-2xl); font-weight: var(--fw-bold); color: var(--color-text-1); line-height: var(--lh-tight) }
.sp4-h2 { font-size: var(--fs-xl); font-weight: var(--fw-bold); color: var(--color-text-1); line-height: var(--lh-snug) }
.sp4-h3 { font-size: var(--fs-lg); font-weight: var(--fw-semi); color: var(--color-text-2); line-height: var(--lh-snug) }
.sp4-body { font-size: var(--fs-base); color: var(--color-text-2); line-height: var(--lh-normal) }
.sp4-muted { font-size: var(--fs-sm); color: var(--color-text-3) }
.sp4-mono { font-family: 'JetBrains Mono', 'Fira Code', monospace; font-size: var(--fs-sm) }

/* ─── Avatar component (Sprint 4 — KN13) ───────────────────────── */
.sp4-avatar {
  width: 32px; height: 32px;
  border-radius: var(--rd-full);
  display: inline-flex; align-items: center; justify-content: center;
  font-weight: var(--fw-bold); font-size: var(--fs-sm);
  color: #fff; background: var(--color-primary);
  box-shadow: var(--sh-sm);
  flex-shrink: 0;
}
.sp4-avatar.sp4-avatar-sm { width: 24px; height: 24px; font-size: 10px }
.sp4-avatar.sp4-avatar-lg { width: 48px; height: 48px; font-size: var(--fs-lg) }
.sp4-avatar.sp4-avatar-xl { width: 64px; height: 64px; font-size: var(--fs-xl) }

/* ─── Bulk action toolbar ──────────────────────────────────────── */
.sp4-bulk-bar {
  position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%);
  background: var(--color-primary); color: #fff;
  border-radius: var(--rd-xl); box-shadow: var(--sh-xl);
  padding: 12px 18px; display: flex; gap: 12px; align-items: center;
  z-index: 7000; min-width: 320px; max-width: 90vw;
  animation: sp4-bulk-slideup .25s ease-out;
}
@keyframes sp4-bulk-slideup {
  from { transform: translate(-50%, 100%); opacity: 0 }
  to   { transform: translate(-50%, 0);    opacity: 1 }
}

/* ─── Dashboard interactive KPI card ──────────────────────────── */
.sp4-kpi-card {
  background: var(--color-bg-1);
  border-radius: var(--rd-xl);
  padding: var(--sp-5);
  box-shadow: var(--sh-md);
  cursor: pointer;
  transition: all .2s ease;
  border-left: 4px solid var(--color-primary);
}
.sp4-kpi-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--sh-lg);
}
.sp4-kpi-card.sp4-kpi-success { border-left-color: var(--color-success) }
.sp4-kpi-card.sp4-kpi-warning { border-left-color: var(--color-warning) }
.sp4-kpi-card.sp4-kpi-danger  { border-left-color: var(--color-danger) }
.sp4-kpi-card.sp4-kpi-info    { border-left-color: var(--color-info) }
.sp4-kpi-trend {
  font-size: var(--fs-xs); font-weight: var(--fw-semi);
  padding: 2px 8px; border-radius: var(--rd-full);
}
.sp4-kpi-trend-up   { background: #dcfce7; color: var(--color-success) }
.sp4-kpi-trend-down { background: #fee2e2; color: var(--color-danger) }
.sp4-kpi-trend-flat { background: #f1f5f9; color: var(--color-text-3) }