/* base.css — BH Intelligence Reports Dashboard
   Reset + design tokens + mandatory base styles */

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

html {
  -moz-text-size-adjust: none;
  -webkit-text-size-adjust: none;
  text-size-adjust: none;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  hanging-punctuation: first last;
  scroll-padding-top: var(--space-16);
}

body {
  min-height: 100dvh;
  line-height: 1.6;
  font-family: var(--font-body, sans-serif);
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-bg);
}

img, picture, video, canvas, svg { display: block; max-width: 100%; height: auto; }
ul[role="list"], ol[role="list"] { list-style: none; }
input, button, textarea, select { font: inherit; color: inherit; }

h1, h2, h3, h4, h5, h6 { text-wrap: balance; line-height: 1.15; }
p, li, figcaption { text-wrap: pretty; max-width: 72ch; }

::selection {
  background: oklch(from var(--color-primary) l c h / 0.25);
  color: var(--color-text);
}

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

button { cursor: pointer; background: none; border: none; }
table { border-collapse: collapse; width: 100%; }

a, button, [role="button"], [role="link"], input, textarea, select {
  transition: color var(--transition-interactive),
              background var(--transition-interactive),
              border-color var(--transition-interactive),
              box-shadow var(--transition-interactive);
}

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border-width: 0;
}

/* ============================================
   TYPE SCALE — Fluid with clamp()
   ============================================ */
:root {
  --text-xs:   clamp(0.75rem,  0.7rem  + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem  + 0.35vw, 1rem);
  --text-base: clamp(1rem,     0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem    + 0.75vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1.2rem  + 1.25vw, 2.25rem);
  --text-2xl:  clamp(2rem,     1.2rem  + 2.5vw,  3.5rem);
  --text-3xl:  clamp(2.5rem,   1rem    + 4vw,    5rem);
  --text-hero: clamp(3rem,     0.5rem  + 7vw,    8rem);
}

/* ============================================
   4px SPACING SYSTEM
   ============================================ */
:root {
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;
}

/* ============================================
   CUSTOM DARK PALETTE — BH Intelligence
   Dark-first professional dashboard UI
   Teal/cyan accent for data/intelligence vibe
   ============================================ */

/* Art direction: SaaS marketing analytics dashboard → dark professional
   Palette: Cool dark charcoal surfaces, teal/cyan accent for precision/intelligence
   Typography: DM Sans (display/headings) + Inter (body/UI) — serious, dense, data-ready
   Density: Dense dashboard layout */

/* DARK MODE (default) */
:root, [data-theme="dark"] {
  --color-bg:               #0f1117;
  --color-surface:          #161820;
  --color-surface-2:        #1c1e28;
  --color-surface-offset:   #1a1c25;
  --color-surface-offset-2: #21232e;
  --color-surface-dynamic:  #282a36;
  --color-divider:          #2a2d3a;
  --color-border:           #353849;

  --color-text:             #e4e4e7;
  --color-text-muted:       #a1a1aa;
  --color-text-faint:       #52525b;
  --color-text-inverse:     #0f1117;

  --color-primary:          #0ea5e9;
  --color-primary-hover:    #38bdf8;
  --color-primary-active:   #0284c7;
  --color-primary-highlight: #0ea5e915;

  --color-success:          #22c55e;
  --color-success-hover:    #16a34a;
  --color-success-active:   #15803d;
  --color-success-highlight: #22c55e15;

  --color-error:            #ef4444;
  --color-error-hover:      #dc2626;
  --color-error-active:     #b91c1c;
  --color-error-highlight:  #ef444415;

  --color-warning:          #f59e0b;
  --color-warning-hover:    #d97706;
  --color-warning-active:   #b45309;
  --color-warning-highlight: #f59e0b15;

  --color-orange:           #f97316;
  --color-gold:             #eab308;
  --color-blue:             #3b82f6;
  --color-purple:           #8b5cf6;

  --shadow-sm: 0 1px 2px oklch(0 0 0 / 0.3);
  --shadow-md: 0 4px 12px oklch(0 0 0 / 0.4);
  --shadow-lg: 0 12px 32px oklch(0 0 0 / 0.5);
}

/* LIGHT MODE */
[data-theme="light"] {
  --color-bg:               #f4f4f5;
  --color-surface:          #ffffff;
  --color-surface-2:        #fafafa;
  --color-surface-offset:   #f0f0f2;
  --color-surface-offset-2: #e8e8ec;
  --color-surface-dynamic:  #dcdce2;
  --color-divider:          #d4d4d8;
  --color-border:           #c4c4cc;

  --color-text:             #18181b;
  --color-text-muted:       #71717a;
  --color-text-faint:       #a1a1aa;
  --color-text-inverse:     #fafafa;

  --color-primary:          #0284c7;
  --color-primary-hover:    #0369a1;
  --color-primary-active:   #075985;
  --color-primary-highlight: #0284c710;

  --color-success:          #16a34a;
  --color-success-hover:    #15803d;
  --color-success-active:   #166534;
  --color-success-highlight: #16a34a10;

  --color-error:            #dc2626;
  --color-error-hover:      #b91c1c;
  --color-error-active:     #991b1b;
  --color-error-highlight:  #dc262610;

  --color-warning:          #d97706;
  --color-warning-hover:    #b45309;
  --color-warning-active:   #92400e;
  --color-warning-highlight: #d9770610;

  --color-orange:           #ea580c;
  --color-gold:             #ca8a04;
  --color-blue:             #2563eb;
  --color-purple:           #7c3aed;

  --shadow-sm: 0 1px 2px oklch(0.2 0.01 250 / 0.06);
  --shadow-md: 0 4px 12px oklch(0.2 0.01 250 / 0.08);
  --shadow-lg: 0 12px 32px oklch(0.2 0.01 250 / 0.12);
}

/* System preference fallback */
@media (prefers-color-scheme: light) {
  :root:not([data-theme]) {
    --color-bg:               #f4f4f5;
    --color-surface:          #ffffff;
    --color-surface-2:        #fafafa;
    --color-surface-offset:   #f0f0f2;
    --color-surface-offset-2: #e8e8ec;
    --color-surface-dynamic:  #dcdce2;
    --color-divider:          #d4d4d8;
    --color-border:           #c4c4cc;
    --color-text:             #18181b;
    --color-text-muted:       #71717a;
    --color-text-faint:       #a1a1aa;
    --color-text-inverse:     #fafafa;
    --color-primary:          #0284c7;
    --color-primary-hover:    #0369a1;
    --color-primary-active:   #075985;
    --color-primary-highlight: #0284c710;
    --color-success:          #16a34a;
    --color-success-hover:    #15803d;
    --color-success-active:   #166534;
    --color-success-highlight: #16a34a10;
    --color-error:            #dc2626;
    --color-error-hover:      #b91c1c;
    --color-error-active:     #991b1b;
    --color-error-highlight:  #dc262610;
    --color-warning:          #d97706;
    --color-warning-hover:    #b45309;
    --color-warning-active:   #92400e;
    --color-warning-highlight: #d9770610;
    --color-orange:           #ea580c;
    --color-gold:             #ca8a04;
    --color-blue:             #2563eb;
    --color-purple:           #7c3aed;
    --shadow-sm: 0 1px 2px oklch(0.2 0.01 250 / 0.06);
    --shadow-md: 0 4px 12px oklch(0.2 0.01 250 / 0.08);
    --shadow-lg: 0 12px 32px oklch(0.2 0.01 250 / 0.12);
  }
}

/* ============================================
   SHARED TOKENS
   ============================================ */
:root {
  --font-display: 'DM Sans', 'Helvetica Neue', sans-serif;
  --font-body: 'Inter', 'Helvetica Neue', sans-serif;

  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);

  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1200px;
  --content-full: 100%;
}