/*
 * BizDevOS Design System v2
 * One font. One color system. One rhythm.
 * Dark: #0d0d1a base. Inter. 4-size modular scale.
 */

/* ── Font ── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

/* ════════════════════════════════════════
   TOKENS — forced on :root so page <style>
   blocks that use var() inherit them.
   Individual page layouts still work.
   ════════════════════════════════════════ */
:root {
  /* Background stack */
  --bg:       #0d0d1a;
  --bg-1:     #13132a;   /* cards */
  --bg-2:     #1a1a38;   /* elevated / hover */
  --bg-3:     #22224a;   /* active / selected */

  /* Borders */
  --bd:       #2a2a50;
  --bd-hi:    #3d3d6a;

  /* Text — 4 levels */
  --tx:       #f0f0ff;   /* primary */
  --tx-2:     #8888bb;   /* secondary */
  --tx-3:     #4a4a7a;   /* muted */
  --tx-4:     #2a2a50;   /* disabled */

  /* Brand — monochromatic blue-violet */
  --blue:     #5b5ef4;
  --blue-h:   #7274ff;
  --blue-bg:  #12123a;

  /* AI — green (analogous neighbor) */
  --green:    #22c55e;
  --green-h:  #4ade80;
  --green-bg: #061a0e;

  /* Semantic */
  --red:      #f87171;
  --red-bg:   #1f0808;
  --amber:    #fbbf24;
  --amber-bg: #1a1000;

  /* Typography — modular scale 1.25×, base 16px */
  --t-caption: 14px;   /* 0.875× */
  --t-body:    16px;   /* 1× base */
  --t-heading: 20px;   /* 1.25× */
  --t-display: 32px;   /* 2× */

  --lh-tight:  1.2;
  --lh-normal: 1.5;
  --lh-loose:  1.75;

  /* Spacing — 8px grid */
  --s1: 4px;
  --s2: 8px;
  --s3: 12px;
  --s4: 16px;
  --s5: 20px;
  --s6: 24px;
  --s8: 32px;
  --s10: 40px;
  --s12: 48px;

  /* Radius */
  --r1: 4px;
  --r2: 8px;
  --r3: 12px;
  --r4: 16px;

  /* Nav */
  --nav-h: 48px;

  /* Elevation */
  --shadow-1: 0 1px 4px rgba(0,0,0,.5);
  --shadow-2: 0 4px 16px rgba(0,0,0,.6);
  --shadow-blue: 0 4px 20px rgba(91,94,244,.3);

  /* Transition */
  --t: 0.12s ease;

  /* Aliases so old page styles still work */
  --bg-main:      var(--bg);
  --bg-secondary: var(--bg-1);
  --bg-tertiary:  var(--bg-2);
  --bg-card:      var(--bg-1);
  --bg-hover:     var(--bg-2);
  --bg-active:    var(--bg-3);
  --border:       var(--bd);
  --border-hi:    var(--bd-hi);
  --text:         var(--tx);
  --text-primary: var(--tx);
  --text-secondary:var(--tx-2);
  --text-muted:   var(--tx-3);
  --accent:       var(--blue);
  --accent-h:     var(--blue-h);
  --accent-light: var(--blue-bg);
  --ai:           var(--green);
  --ai-bg:        var(--green-bg);
  --danger:       var(--red);
  --danger-bg:    var(--red-bg);
  --warn:         var(--amber);
  --warn-bg:      var(--amber-bg);
  --success:      var(--green);

  /* Nav aliases */
  --nav-bg: rgba(13,13,26,.96);
  --c-bg: var(--bg);
  --c-bg-card: var(--bg-1);
  --c-bg-hover: var(--bg-2);
  --c-bg-active: var(--bg-3);
  --c-border: var(--bd);
  --c-border-hi: var(--bd-hi);
  --c-text: var(--tx);
  --c-text-2: var(--tx-2);
  --c-text-3: var(--tx-3);
  --c-accent: var(--blue);
  --c-accent-h: var(--blue-h);
  --c-accent-bg: var(--blue-bg);
  --c-ai: var(--green);
  --c-ai-bg: var(--green-bg);
  --c-danger: var(--red);
}

/* Light theme */
[data-theme="light"] {
  --bg:       #f5f5fb;
  --bg-1:     #ffffff;
  --bg-2:     #eeeef8;
  --bg-3:     #e0e0f0;
  --bd:       #d8d8ee;
  --bd-hi:    #b8b8dd;
  --tx:       #0d0d2a;
  --tx-2:     #5a5a8a;
  --tx-3:     #9090b8;
  --tx-4:     #c0c0d8;
  --blue:     #4f52e0;
  --blue-h:   #3d40cc;
  --blue-bg:  #eeeeff;
  --green:    #16a34a;
  --green-h:  #15803d;
  --green-bg: #f0fdf4;
  --red:      #dc2626;
  --red-bg:   #fef2f2;
  --amber:    #d97706;
  --amber-bg: #fffbeb;
  --nav-bg: rgba(245,245,251,.97);
}

/* ════════════════════════════════════════
   BASE — force font + bg + color on body
   Uses !important to win over page <style>
   ════════════════════════════════════════ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  background: var(--bg) !important;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif !important;
  font-size: var(--t-body) !important;
  line-height: var(--lh-normal) !important;
  background: var(--bg) !important;
  color: var(--tx) !important;
  min-height: 100vh;
}

/* Override page fonts on common elements */
button, input, select, textarea, a {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif !important;
}

a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
img { display: block; max-width: 100%; }

/* ════════════════════════════════════════
   NAV — wins over everything
   ════════════════════════════════════════ */
.biz-nav {
  position: sticky !important;
  top: 0 !important;
  z-index: 1000 !important;
  display: flex !important;
  align-items: center !important;
  height: var(--nav-h) !important;
  padding: 0 var(--s6) !important;
  background: var(--nav-bg) !important;
  backdrop-filter: blur(16px) !important;
  -webkit-backdrop-filter: blur(16px) !important;
  border-bottom: 1px solid var(--bd) !important;
  gap: 0 !important;
  font-family: 'Inter', sans-serif !important;
}

.biz-nav__logo {
  font-size: 15px !important;
  font-weight: 700 !important;
  letter-spacing: -0.03em !important;
  color: var(--tx) !important;
  margin-right: var(--s6) !important;
  flex-shrink: 0 !important;
  text-decoration: none !important;
}

.biz-nav__sep {
  width: 1px !important;
  height: 18px !important;
  background: var(--bd-hi) !important;
  margin-right: var(--s5) !important;
  flex-shrink: 0 !important;
}

.biz-nav__links {
  display: flex !important;
  align-items: center !important;
  gap: 2px !important;
  flex: 1 !important;
  list-style: none !important;
  margin: 0 !important;
  padding: 0 !important;
}

.biz-nav__link {
  display: inline-flex !important;
  align-items: center !important;
  height: 30px !important;
  padding: 0 var(--s3) !important;
  font-size: 13px !important;
  font-weight: 400 !important;
  color: var(--tx-2) !important;
  border-radius: var(--r1) !important;
  transition: color var(--t), background var(--t) !important;
  white-space: nowrap !important;
  text-decoration: none !important;
}
.biz-nav__link:hover {
  color: var(--tx) !important;
  background: var(--bg-2) !important;
}
.biz-nav__link.is-active {
  color: var(--tx) !important;
  font-weight: 600 !important;
  background: var(--bg-3) !important;
}
.biz-nav__link.is-ai { color: var(--green) !important; }
.biz-nav__link.is-ai:hover,
.biz-nav__link.is-ai.is-active {
  color: var(--green) !important;
  background: var(--green-bg) !important;
}

.biz-nav__right {
  display: flex !important;
  align-items: center !important;
  gap: var(--s2) !important;
  margin-left: var(--s4) !important;
  flex-shrink: 0 !important;
}

.biz-nav__theme {
  width: 30px !important; height: 30px !important;
  display: inline-flex !important;
  align-items: center !important; justify-content: center !important;
  background: none !important; border: none !important;
  cursor: pointer !important; font-size: 15px !important;
  color: var(--tx-3) !important;
  border-radius: var(--r1) !important;
  transition: color var(--t), background var(--t) !important;
  font-family: inherit !important;
}
.biz-nav__theme:hover {
  color: var(--tx-2) !important;
  background: var(--bg-2) !important;
}

/* ════════════════════════════════════════
   TYPOGRAPHY — applied globally
   ════════════════════════════════════════ */

/* Caption — 14px, muted */
.t-caption, .filter-label, .sidebar-title,
.stat-chip span, .batch-list-header h2,
.draft-label, .metric-label, .text-label {
  font-size: var(--t-caption) !important;
  color: var(--tx-3) !important;
  font-weight: 600 !important;
  letter-spacing: .06em !important;
  text-transform: uppercase !important;
}

/* Body — 16px (default) */

/* Heading — 20px */
h2, .page-title, .section-title, .batch-title,
.lead-title, .modal h3, .t-heading {
  font-size: var(--t-heading) !important;
  font-weight: 700 !important;
  letter-spacing: -0.01em !important;
  color: var(--tx) !important;
}

/* Display — 32px */
h1, .t-display {
  font-size: var(--t-display) !important;
  font-weight: 700 !important;
  letter-spacing: -0.02em !important;
  color: var(--tx) !important;
}

/* Smaller h3, h4 */
h3 { font-size: 18px !important; font-weight: 600 !important; color: var(--tx) !important; }
h4 { font-size: var(--t-body) !important; font-weight: 600 !important; color: var(--tx) !important; }

p { font-size: var(--t-body); color: var(--tx-2); line-height: var(--lh-normal); }

/* ════════════════════════════════════════
   BUTTONS — global normalisation
   ════════════════════════════════════════ */
.btn, button:not([class]),
.sidebar-btn, .btn-primary, .btn-ghost,
.btn-secondary, .nav-tab, .btn-view,
.link-btn, .btn-new-experiment {
  font-family: 'Inter', sans-serif !important;
  font-size: 14px !important;
  font-weight: 500 !important;
  border-radius: var(--r2) !important;
  cursor: pointer !important;
  transition: background var(--t), color var(--t), opacity var(--t) !important;
}

/* Button variants */
.btn-primary {
  background: var(--blue) !important;
  color: #fff !important;
  border: none !important;
  padding: 6px 14px !important;
}
.btn-primary:hover { background: var(--blue-h) !important; }

.btn-secondary, .btn-ghost {
  background: var(--bg-2) !important;
  color: var(--tx) !important;
  border: 1px solid var(--bd) !important;
  padding: 6px 14px !important;
}
.btn-secondary:hover, .btn-ghost:hover { background: var(--bg-3) !important; }

.btn-danger {
  background: var(--red) !important;
  color: #fff !important;
  border: none !important;
  padding: 6px 14px !important;
  border-radius: var(--r2) !important;
  font-family: 'Inter', sans-serif !important;
  font-size: 14px !important;
  font-weight: 500 !important;
  cursor: pointer !important;
}
.btn-danger:hover { opacity: .85 !important; }

/* Default unstyled buttons get neutral look */
button:not([class]) {
  background: var(--bg-2) !important;
  color: var(--tx) !important;
  border: 1px solid var(--bd) !important;
  padding: 6px 14px !important;
}

/* ════════════════════════════════════════
   INPUTS — global normalisation
   ════════════════════════════════════════ */
input:not([type="checkbox"]):not([type="radio"]):not([type="range"]),
select, textarea {
  font-family: 'Inter', sans-serif !important;
  font-size: 14px !important;
  background: var(--bg-1) !important;
  color: var(--tx) !important;
  border: 1px solid var(--bd) !important;
  border-radius: var(--r2) !important;
  outline: none !important;
  transition: border-color var(--t), box-shadow var(--t) !important;
}
input:focus, select:focus, textarea:focus {
  border-color: var(--blue) !important;
  box-shadow: 0 0 0 3px rgba(91,94,244,.2) !important;
}
input::placeholder, textarea::placeholder { color: var(--tx-3) !important; }

/* ════════════════════════════════════════
   CARDS — global normalisation
   ════════════════════════════════════════ */
.card, .experiment-card, .stat-card,
.batch-item, .contact-card,
.item-card, .seg-stat-card,
.seg-group {
  background: var(--bg-1) !important;
  border: 1px solid var(--bd) !important;
  border-radius: var(--r2) !important;
}

/* ════════════════════════════════════════
   SCROLLBAR
   ════════════════════════════════════════ */
::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--bd-hi); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--tx-3); }

/* ════════════════════════════════════════
   MODALS
   ════════════════════════════════════════ */
.modal-overlay, .modal-bg {
  background: rgba(0,0,0,.65) !important;
  backdrop-filter: blur(8px) !important;
}
.modal, .modal-content {
  background: var(--bg-1) !important;
  border: 1px solid var(--bd-hi) !important;
  border-radius: var(--r3) !important;
  color: var(--tx) !important;
}

/* ════════════════════════════════════════
   BADGES / STATUS — never green for CRM
   ════════════════════════════════════════ */
.status-badge, .badge, .experiment-status {
  font-size: 11px !important;
  font-weight: 600 !important;
  border-radius: var(--r1) !important;
  padding: 2px 7px !important;
  letter-spacing: .04em !important;
}

/* ════════════════════════════════════════
   TOAST / NOTIFICATIONS
   ════════════════════════════════════════ */
.toast, .biz-toast, .crm-toast {
  font-family: 'Inter', sans-serif !important;
  font-size: 14px !important;
  border-radius: var(--r2) !important;
}

/* ════════════════════════════════════════
   SPINNER
   ════════════════════════════════════════ */
.spinner {
  display: inline-block;
  width: 16px; height: 16px;
  border: 2px solid var(--bd-hi);
  border-top-color: var(--blue);
  border-radius: 50%;
  animation: spin .6s linear infinite;
  vertical-align: middle;
}
.spinner-lg { width: 24px; height: 24px; border-width: 3px; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ════════════════════════════════════════
   EMPTY STATES
   ════════════════════════════════════════ */
.empty-state, .detail-empty, .no-batches {
  display: flex !important;
  flex-direction: column !important;
  align-items: center !important;
  justify-content: center !important;
  color: var(--tx-3) !important;
  font-size: 14px !important;
  text-align: center !important;
  padding: var(--s12) var(--s6) !important;
}

/* ════════════════════════════════════════
   TABLES
   ════════════════════════════════════════ */
th {
  font-size: 11px !important;
  font-weight: 600 !important;
  letter-spacing: .07em !important;
  text-transform: uppercase !important;
  color: var(--tx-3) !important;
}
td { font-size: 14px !important; color: var(--tx) !important; }
tr:hover td { background: var(--bg-2) !important; }

/* ════════════════════════════════════════
   DIVIDERS & BORDERS
   ════════════════════════════════════════ */
hr, .divider { border-color: var(--bd) !important; }

/* ════════════════════════════════════════
   UTILITY CLASSES
   ════════════════════════════════════════ */
.text-ai     { color: var(--green) !important; }
.text-accent { color: var(--blue) !important; }
.text-muted  { color: var(--tx-3) !important; }
.text-danger { color: var(--red) !important; }
.text-sub    { color: var(--tx-2) !important; }
.text-bold   { font-weight: 700 !important; }
.text-mono   { font-family: 'SF Mono', 'Fira Code', monospace !important; font-size: 13px !important; }

.bg-card   { background: var(--bg-1) !important; }
.bg-hover  { background: var(--bg-2) !important; }
.border    { border: 1px solid var(--bd) !important; }
.rounded   { border-radius: var(--r2) !important; }
.rounded-lg{ border-radius: var(--r3) !important; }

/* ════════════════════════════════════════
   THEME INIT SNIPPET (paste before </body>)

   <script>
   (function(){
     var t=localStorage.getItem('biz-theme')||
       (matchMedia('(prefers-color-scheme:dark)').matches?'dark':'light');
     document.documentElement.setAttribute('data-theme',t);
   })();
   function toggleTheme(){
     var r=document.documentElement;
     var n=r.getAttribute('data-theme')==='dark'?'light':'dark';
     r.setAttribute('data-theme',n);
     localStorage.setItem('biz-theme',n);
   }
   function _tok(){
     try{var m=document.cookie.match(/(?:^|;\s*)token=([^;]+)/);if(m)return m[1];}catch(_){}
     try{return sessionStorage.getItem('accessToken')||localStorage.getItem('accessToken')||'';}catch(_){return '';}
   }
   function _hdr(e){var t=_tok();return Object.assign(t?{'Authorization':'Bearer '+t}:{},e||{});}
   </script>
   ════════════════════════════════════════ */