/**
 * Adam Analytics Design System
 * =============================================================================
 * Central design token file. All templates and components MUST use these tokens.
 * Never hard-code colors or font stacks — reference variables instead.
 *
 * Brand: "Modern Stoic"
 * Aesthetic: clean IDE + premium data report
 * Principle: clarity over hype
 *
 * @package Adam_Analytics
 * @version 2.0.0
 */

/* ===================================================
   COLOR TOKENS
   =================================================== */
:root {
  /* ---- Primary Palette ---- */
  --aa-bg-primary:      #0F172A;  /* Obsidian Slate — main background */
  --aa-bg-secondary:    #020617;  /* Deep Navy — footer, alt sections */
  --aa-surface:         #111827;  /* Surface — cards, panels, elevated elements */
  --aa-text-primary:    #F8FAFC;  /* Ghost White — headings, primary text */
  --aa-text-secondary:  #94A3B8;  /* Slate 400 — body, descriptions, muted text */
  --aa-accent-primary:  #6366F1;  /* Electric Indigo — buttons, links, highlights */
  --aa-warning:         #F59E0B;  /* Signal Amber — callouts, key insight markers */
  --aa-success:         #10B981;  /* Emerald Logic — positive metrics, status */

  /* ---- Borders & Surfaces ---- */
  --aa-border-subtle:   #1E293B;  /* Subtle dividers, card borders */
  --aa-border-strong:   #334155;  /* Active borders, hover states */
  --aa-hover-bg:        rgba(99, 102, 241, 0.10);  /* Accent hover background */
  --aa-focus-ring:      rgba(99, 102, 241, 0.50);  /* Focus outline */

  /* ---- Accent Variants ---- */
  --aa-accent-hover:    #818CF8;  /* Indigo 400 — link/button hover */
  --aa-accent-muted:    rgba(99, 102, 241, 0.15);  /* Subtle accent background */
  --aa-warning-muted:   rgba(245, 158, 11, 0.12);
  --aa-success-muted:   rgba(16, 185, 129, 0.12);

  /* ---- Legacy Mappings (backward compat) ---- */
  --aa-teal:            var(--aa-accent-primary);
  --aa-light-turquoise: var(--aa-accent-hover);
  --aa-black:           var(--aa-bg-primary);
  --aa-cream:           var(--aa-text-primary);
  --aa-gray:            var(--aa-text-secondary);
  --aa-white:           #FFFFFF;

  /* ===================================================
     TYPOGRAPHY TOKENS
     =================================================== */
  --aa-font-sans:   "Inter", system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  --aa-font-mono:   "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;

  /* Legacy Mappings */
  --font-heading:   var(--aa-font-sans);
  --font-body:      var(--aa-font-sans);
  --font-mono:      var(--aa-font-mono);

  /* ---- Type Scale ---- */
  --aa-text-xs:     0.75rem;    /* 12px */
  --aa-text-sm:     0.875rem;   /* 14px */
  --aa-text-base:   1rem;       /* 16px */
  --aa-text-lg:     1.125rem;   /* 18px */
  --aa-text-xl:     1.25rem;    /* 20px */
  --aa-text-2xl:    1.5rem;     /* 24px */
  --aa-text-3xl:    1.875rem;   /* 30px */
  --aa-text-4xl:    2.25rem;    /* 36px */
  --aa-text-5xl:    3rem;       /* 48px */
  --aa-text-6xl:    3.75rem;    /* 60px */

  /* ---- Line Heights ---- */
  --aa-leading-tight:   1.15;
  --aa-leading-snug:    1.3;
  --aa-leading-normal:  1.6;
  --aa-leading-relaxed: 1.8;

  /* ---- Letter Spacing ---- */
  --aa-tracking-tight:  -0.025em;
  --aa-tracking-normal: 0;
  --aa-tracking-wide:   0.025em;
  --aa-tracking-wider:  0.1em;
  --aa-tracking-widest: 0.2em;

  /* ===================================================
     SPACING & LAYOUT TOKENS
     =================================================== */
  --aa-container-max:     80rem;   /* 1280px */
  --aa-container-narrow:  64rem;   /* 1024px */
  --aa-container-prose:   50rem;   /* 800px — reading width */
  --aa-container-compact: 56rem;   /* 896px — case study body */

  /* ---- Radius ---- */
  --aa-radius-none:  0;
  --aa-radius-sm:    2px;
  --aa-radius-md:    4px;
  --aa-radius-lg:    6px;

  /* ---- Transitions ---- */
  --aa-transition-fast:   150ms ease;
  --aa-transition-normal: 200ms ease;
  --aa-transition-slow:   300ms ease;
}

/* ===================================================
   COMPONENT: BUTTONS
   =================================================== */
.aa-button-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background-color: var(--aa-accent-primary);
  color: #FFFFFF;
  font-family: var(--aa-font-sans);
  font-size: var(--aa-text-sm);
  font-weight: 500;
  letter-spacing: var(--aa-tracking-wide);
  padding: 0.75rem 1.5rem;
  border: 1px solid var(--aa-accent-primary);
  border-radius: var(--aa-radius-sm);
  cursor: pointer;
  transition: all var(--aa-transition-normal);
  text-decoration: none;
}

.aa-button-primary:hover {
  background-color: var(--aa-accent-hover);
  border-color: var(--aa-accent-hover);
  color: #FFFFFF;
  transform: translateY(-2px);
  box-shadow: 0 8px 16px rgba(99, 102, 241, 0.3);
}

.aa-button-primary:focus-visible {
  outline: 2px solid var(--aa-focus-ring);
  outline-offset: 2px;
}

.aa-button-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: transparent;
  color: var(--aa-text-primary);
  font-family: var(--aa-font-sans);
  font-size: var(--aa-text-sm);
  font-weight: 500;
  letter-spacing: var(--aa-tracking-wide);
  padding: 0.75rem 1.5rem;
  border: 1px solid var(--aa-border-strong);
  border-radius: var(--aa-radius-sm);
  cursor: pointer;
  transition: all var(--aa-transition-normal);
  text-decoration: none;
}

.aa-button-secondary:hover {
  background-color: var(--aa-accent-primary);
  border-color: var(--aa-accent-primary);
  color: #FFFFFF;
  transform: translateY(-2px);
}

.aa-button-secondary:focus-visible {
  outline: 2px solid var(--aa-focus-ring);
  outline-offset: 2px;
}

.aa-button-ghost {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: transparent;
  color: var(--aa-text-secondary);
  font-family: var(--aa-font-sans);
  font-size: var(--aa-text-sm);
  font-weight: 500;
  letter-spacing: var(--aa-tracking-wide);
  padding: 0.5rem 0;
  border: none;
  cursor: pointer;
  transition: color var(--aa-transition-normal);
  text-decoration: none;
}

.aa-button-ghost:hover {
  color: var(--aa-text-primary);
}

.aa-button-ghost:focus-visible {
  outline: 2px solid var(--aa-focus-ring);
  outline-offset: 2px;
}

/* ===================================================
   COMPONENT: CHIPS / TAGS
   =================================================== */
.aa-chip {
  display: inline-flex;
  align-items: center;
  font-family: var(--aa-font-mono);
  font-size: var(--aa-text-xs);
  padding: 0.25rem 0.625rem;
  border: 1px solid var(--aa-border-subtle);
  border-radius: var(--aa-radius-sm);
  color: var(--aa-text-secondary);
  white-space: nowrap;
  transition: all var(--aa-transition-normal);
}

.aa-chip:hover {
  border-color: var(--aa-border-strong);
  color: var(--aa-text-primary);
}

.aa-chip--accent {
  border-color: var(--aa-accent-muted);
  color: var(--aa-accent-primary);
  background: var(--aa-accent-muted);
}

/* ===================================================
   COMPONENT: DIVIDER
   =================================================== */
.aa-divider {
  height: 1px;
  width: 100%;
  background: var(--aa-border-subtle);
  border: none;
}

.aa-divider--accent {
  background: var(--aa-accent-primary);
}

/* ===================================================
   COMPONENT: META
   =================================================== */
.aa-meta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--aa-font-mono);
  font-size: var(--aa-text-xs);
  color: var(--aa-text-secondary);
  letter-spacing: var(--aa-tracking-wide);
}

.aa-meta span + span::before {
  content: "\00B7";
  margin-right: 0.5rem;
}

/* ===================================================
   COMPONENT: CALLOUTS
   =================================================== */
.aa-callout {
  padding: 1.25rem 1.5rem;
  border-left: 3px solid var(--aa-border-strong);
  border-radius: var(--aa-radius-sm);
  background: var(--aa-surface);
  font-size: var(--aa-text-sm);
  line-height: var(--aa-leading-relaxed);
  color: var(--aa-text-secondary);
  margin: 1.5rem 0;
}

.aa-callout--note {
  border-left-color: var(--aa-warning);
  background: var(--aa-warning-muted);
}

.aa-callout--success {
  border-left-color: var(--aa-success);
  background: var(--aa-success-muted);
}

.aa-callout--accent {
  border-left-color: var(--aa-accent-primary);
  background: var(--aa-accent-muted);
}

.aa-callout strong,
.aa-callout b {
  color: var(--aa-text-primary);
}

/* ===================================================
   COMPONENT: CODE (inline)
   =================================================== */
.aa-code-inline {
  font-family: var(--aa-font-mono);
  font-size: 0.85em;
  background: rgba(99, 102, 241, 0.08);
  color: var(--aa-accent-hover);
  padding: 0.125rem 0.375rem;
  border-radius: var(--aa-radius-sm);
}

/* ===================================================
   COMPONENT: KPI / METRIC
   =================================================== */
.aa-kpi {
  text-align: left;
}

.aa-kpi-value {
  font-family: var(--aa-font-mono);
  font-size: var(--aa-text-4xl);
  font-weight: 700;
  color: var(--aa-success);
  letter-spacing: var(--aa-tracking-tight);
  line-height: 1;
  margin-bottom: 0.25rem;
}

.aa-kpi-label {
  font-family: var(--aa-font-mono);
  font-size: var(--aa-text-xs);
  color: var(--aa-text-secondary);
  letter-spacing: var(--aa-tracking-wide);
  text-transform: uppercase;
}

/* ===================================================
   COMPONENT: SKIP TO CONTENT (A11Y)
   =================================================== */
.aa-skip-link {
  position: absolute;
  left: -9999px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
  z-index: 9999;
  background: var(--aa-accent-primary);
  color: #FFFFFF;
  font-size: var(--aa-text-sm);
  font-weight: 600;
  padding: 0.75rem 1.5rem;
  text-decoration: none;
  border-radius: 0 0 var(--aa-radius-md) 0;
}

.aa-skip-link:focus {
  position: fixed;
  left: 0;
  top: 0;
  width: auto;
  height: auto;
  outline: 2px solid var(--aa-focus-ring);
}

/* ===================================================
   UTILITY: FOCUS STATES (global)
   =================================================== */
:focus-visible {
  outline: 2px solid var(--aa-focus-ring);
  outline-offset: 2px;
}

/* Remove outline on mouse click but keep for keyboard */
:focus:not(:focus-visible) {
  outline: none;
}

/* ===================================================
   UTILITY: ACCENT TEXT (for signal words)
   =================================================== */
.aa-accent {
  color: var(--aa-accent-primary);
}

.aa-accent-strong {
  color: var(--aa-accent-primary);
  font-weight: 600;
}

/* ===================================================
   UTILITY: SCREEN READER ONLY
   =================================================== */
.sr-only,
.screen-reader-text {
  clip: rect(1px, 1px, 1px, 1px);
  clip-path: inset(50%);
  position: absolute !important;
  height: 1px;
  width: 1px;
  overflow: hidden;
  word-wrap: normal !important;
  white-space: nowrap;
}

.sr-only:focus,
.screen-reader-text:focus {
  clip: auto !important;
  clip-path: none;
  background: var(--aa-bg-primary);
  color: var(--aa-text-primary);
  display: block;
  font-size: var(--aa-text-sm);
  font-weight: 700;
  height: auto;
  left: 5px;
  line-height: normal;
  padding: 1rem 1.5rem;
  text-decoration: none;
  top: 5px;
  width: auto;
  z-index: 100000;
  border: 2px solid var(--aa-focus-ring);
}