/* ============================================================
   Pluto — Nebula Corporation
   Multi-Theme Accessibility Stylesheet
   ============================================================ */

:root {
  /* Default Theme (Dark) */
  --nb-bg:          #080c14;
  --nb-surface:     #0f1623;
  --nb-card:        #141e2e;
  --nb-card-hover:  #1a2540;
  --nb-border:      #1e2d45;
  --nb-primary:     #7c5cfc;
  --nb-primary-dim: #4a2fcc;
  --nb-accent:      #00d4ff;
  --nb-text:        #dde4f0;
  --nb-muted:       #6b7fa0;
  --nb-success:     #22c55e;
  --nb-warning:     #f59e0b;
  --nb-danger:      #ef4444;
  --nb-focus:       #00d4ff;
  
  /* Global Scaling Factor */
  --nb-base-size:   1rem;
}

/* ── Themes ─────────────────────────────────────────────── */

.theme-light {
  --nb-bg:          #f0f4f8;
  --nb-surface:     #ffffff;
  --nb-card:        #ffffff;
  --nb-card-hover:  #f8fafc;
  --nb-border:      #cbd5e1;
  --nb-primary:     #6366f1;
  --nb-primary-dim: #4f46e5;
  --nb-accent:      #0ea5e9;
  --nb-text:        #1e293b;
  --nb-muted:       #64748b;
  --nb-success:     #16a34a;
  --nb-warning:     #d97706;
  --nb-danger:      #dc2626;
  --nb-focus:       #2563eb;
}

.theme-high-contrast {
  --nb-bg:          #000000;
  --nb-surface:     #000000;
  --nb-card:        #000000;
  --nb-card-hover:  #111111;
  --nb-border:      #ffffff;
  --nb-primary:     #ffff00;
  --nb-primary-dim: #cccc00;
  --nb-accent:      #00ffff;
  --nb-text:        #ffffff;
  --nb-muted:       #ffff00;
  --nb-success:     #00ff00;
  --nb-warning:     #ffff00;
  --nb-danger:      #ff0000;
  --nb-focus:       #ffff00;
}

/* ── Vision Modes (CVD Support) ─────────────────────────── */

.cvd-protanopia {
  --nb-success: #7a7a7a;
  --nb-danger:  #555555;
  --nb-primary: #6366f1;
}

.cvd-deuteranopia {
  --nb-success: #8f8f8f;
  --nb-danger:  #666666;
}

.cvd-tritanopia {
  --nb-warning: #ff5555;
  --nb-accent:  #00e5e5;
}

/* ── Text Sizing (Relative Scaling) ────────────────────── */

.text-normal  { --nb-base-size: 1rem; }
.text-large   { --nb-base-size: 1.2rem; }
.text-xlarge  { --nb-base-size: 1.45rem; }

/* ── Base ───────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }

html { 
  scroll-behavior: smooth; 
  /* We scale the root so all 'rem' units everywhere scale together */
  font-size: calc(16px * (var(--nb-base-size) / 1rem));
}

body {
  background-color: var(--nb-bg);
  color: var(--nb-text);
  font-family: 'Inter', 'Segoe UI', system-ui, sans-serif;
  font-size: 1rem;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: background-color 0.2s, color 0.2s, font-size 0.2s;
}

main { flex: 1; outline: none; }

/* Keyboard Focus Accessibility */
:focus-visible {
  outline: 3px solid var(--nb-focus) !important;
  outline-offset: 2px;
}

/* Visually hidden but accessible to screen readers */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

/* Skip link for keyboard users */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--nb-primary);
  color: white;
  padding: 8px;
  z-index: 3000;
  transition: top 0.2s;
}
.skip-link:focus { top: 0; }

a { color: var(--nb-primary); text-decoration: none; }
a:hover { color: var(--nb-accent); text-decoration: underline; }

code, pre {
  background: rgba(0,0,0,0.2);
  border: 1px solid var(--nb-border);
  border-radius: 6px;
  color: var(--nb-accent);
  font-size: .875rem;
}
code { padding: .15em .4em; }
pre  { padding: 1rem; overflow-x: auto; }

/* ── Navbar ─────────────────────────────────────────────── */
.navbar {
  background: var(--nb-surface) !important;
  border-bottom: 1px solid var(--nb-border);
  backdrop-filter: blur(12px);
  min-height: 3.5rem;
}

.navbar-brand {
  font-weight: 700;
  font-size: 1.35rem;
  letter-spacing: -.02em;
}

.navbar-brand .logo-pluto { color: var(--nb-primary); }
.logo-pluto { 
  color: var(--nb-primary); 
  font-weight: 800; 
  letter-spacing: -0.02em;
  text-shadow: 0 0 15px rgba(124, 92, 252, 0.3);
}
.navbar-brand .logo-corp  { color: var(--nb-muted); font-size: .9rem; }

.nav-link { 
  color: var(--nb-muted) !important; 
  transition: color .15s; 
  font-size: 1rem; 
  display: flex !important;
  align-items: center !important;
  white-space: nowrap !important;
  gap: 0.5rem;
}
.nav-link:hover, .nav-link.active { color: var(--nb-text) !important; }

/* ── Vault Pill Styling ────────────────────────────────── */
.vault-pill {
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--nb-border);
  border-radius: 999px;
  padding: 0.25rem 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: all 0.2s;
}
.vault-pill:hover {
  border-color: var(--nb-primary);
  background: rgba(124, 92, 252, 0.1);
}

/* ── Accessibility Toggle Button ───────────────────────── */
.a11y-btn {
  background: transparent;
  border: 1px solid var(--nb-border);
  color: var(--nb-muted);
  border-radius: 8px;
  padding: 0.4rem 0.7rem;
  transition: all 0.2s;
}
.a11y-btn:hover, .a11y-btn[aria-expanded="true"] {
  background: rgba(124,92,252,0.1);
  color: var(--nb-primary);
  border-color: var(--nb-primary);
}

/* ── Mega Menu Dropdown ────────────────────────────────── */
.dropdown-mega {
  min-width: 600px;
  padding: 1.5rem;
  border-radius: 16px;
}

@media (max-width: 991.98px) {
  .dropdown-mega {
    min-width: 100%;
    padding: 1rem;
  }
}

.mega-menu-column {
  flex: 1;
  min-width: 200px;
}

.mega-menu-title {
  font-size: 0.7rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--nb-muted);
  margin-bottom: 1rem;
  padding-left: 0.5rem;
  border-left: 2px solid var(--nb-primary);
}

.dropdown-item-mega {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.6rem 0.75rem;
  border-radius: 8px;
  color: var(--nb-text);
  text-decoration: none;
  font-size: 0.85rem;
  transition: all 0.2s;
}

.dropdown-item-mega:hover {
  background: rgba(124, 92, 252, 0.1);
  color: var(--nb-primary);
}

.dropdown-item-mega i {
  font-size: 1.1rem;
  width: 20px;
  text-align: center;
}

/* ── Cards ──────────────────────────────────────────────── */
.card {
  background: var(--nb-card);
  border: 1px solid var(--nb-border);
  border-radius: 0.75rem;
  transition: border-color .2s, background .2s;
  color: var(--nb-text);
}
.card:hover   { border-color: var(--nb-primary); }
.card-header  { background: rgba(124,92,252,.08); border-bottom: 1px solid var(--nb-border); padding: 0.75rem 1.25rem; }
.card-body    { padding: 1.25rem; }
.card-footer  { background: transparent; border-top: 1px solid var(--nb-border); padding: 0.75rem 1.25rem; }

/* ── Buttons ────────────────────────────────────────────── */
.btn {
  font-size: 1rem;
  padding: 0.375rem 0.75rem;
}
.btn-sm { font-size: 0.875rem; }
.btn-xs { font-size: 0.75rem; padding: 0.2rem 0.4rem; }

.btn-primary {
  background: var(--nb-primary);
  border-color: var(--nb-primary);
  color: #fff;
}
.btn-primary:hover, .btn-primary:focus {
  background: var(--nb-primary-dim);
  border-color: var(--nb-primary-dim);
  color: #fff;
}

.btn-outline-primary {
  border-color: var(--nb-primary);
  color: var(--nb-primary);
}
.btn-outline-primary:hover {
  background: var(--nb-primary);
  color: #fff;
}

/* ── Forms ──────────────────────────────────────────────── */
.form-control, .form-select {
  background: var(--nb-surface);
  border: 1px solid var(--nb-border);
  color: var(--nb-text);
  border-radius: 0.5rem;
  font-size: 1rem;
}
.form-label { color: var(--nb-text); font-weight: 500; font-size: 1rem; }
.form-text  { color: var(--nb-muted); font-size: 0.875rem; }

/* ── Tables ─────────────────────────────────────────────── */
.table {
  color: var(--nb-text);
  border-color: var(--nb-border);
  font-size: 1rem;
}
.table th { color: var(--nb-muted); font-weight: 600; font-size: 0.8rem; text-transform: uppercase; letter-spacing: .06em; }

/* ── Badges ─────────────────────────────────────────────── */
.status-badge { padding: .25em .6rem; border-radius: 999px; font-size: 0.78rem; font-weight: 600; }

/* ── Sidebar ────────────────────────────────────────────── */
.sidebar {
  background: var(--nb-surface);
  border-right: 1px solid var(--nb-border);
  min-height: calc(100vh - 56px);
  padding: 1.5rem 1rem;
}
.sidebar .nav-link {
  border-radius: 0.5rem;
  padding: .55rem .85rem;
  font-size: 0.9rem;
  margin-bottom: .2rem;
}

/* ── Stats ──────────────────────────────────────────────── */
.stat-card { border-radius: 0.75rem; padding: 1.5rem; }
.stat-card .stat-value { font-size: 2rem; font-weight: 800; }
.stat-card .stat-label { font-size: 0.8rem; color: var(--nb-muted); text-transform: uppercase; }

/* ── Footer ─────────────────────────────────────────────── */
footer {
  border-top: 1px solid var(--nb-border);
  padding: 1.5rem 0;
  color: var(--nb-muted);
  font-size: 0.85rem;
  background: var(--nb-surface);
}

/* ── Utilities ──────────────────────────────────────────── */
.text-muted    { color: var(--nb-muted) !important; }
.text-primary  { color: var(--nb-primary) !important; }
.text-accent   { color: var(--nb-accent) !important; }
.text-success  { color: var(--nb-success) !important; }
.text-warning  { color: var(--nb-warning) !important; }
.text-danger   { color: var(--nb-danger) !important; }
.bg-surface    { background: var(--nb-surface) !important; }
.bg-card       { background: var(--nb-card) !important; }
.font-mono     { font-family: monospace; }