final.css

:root{
  /* ---- shared tokens (identity that doesn't change with theme) ---- */
  --font-display: 'Fraunces', Georgia, serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
 
  /* pillar / variable identity colors — same in both themes */
  --c-social: #C1633F;   /* warm coral/red   */
  --c-study:  #C79A3A;   /* golden/yellow    */
  --c-sleep:  #4F7089;   /* muted blue       */
  --c-active: #5E8A5A;   /* muted green      */
  --c-depression: #7C5C74; /* muted plum, respectful, non-alarming */
  --c-warning: #B4472F;  /* high-stress tone */
  --c-accent: #C79A3A;
 
  --radius-s: 6px;
  --radius-m: 12px;
  --radius-l: 22px;
  --ease: cubic-bezier(.4,0,.2,1);
}
 
/* ---- DARK THEME (default) ---- */
[data-theme="dark"]{
  --bg: #14171E;
  --bg-raised: #1C202A;
  --bg-card: #20242F;
  --bg-sunken: #10131A;
  --text: #EDE8DC;
  --text-dim: #A6A395;
  --text-faint: #706C60;
  --border: rgba(237,232,220,0.09);
  --border-strong: rgba(237,232,220,0.16);
  --shadow: 0 18px 45px rgba(0,0,0,0.45);
  --stage-glow: radial-gradient(60% 55% at 50% 20%, rgba(199,154,58,0.10), transparent 70%);
}
 
/* ---- LIGHT THEME ---- */
[data-theme="light"]{
  --bg: #F4EFE4;
  --bg-raised: #EAE3D3;
  --bg-card: #FBF8F0;
  --bg-sunken: #E5DDC9;
  --text: #241F17;
  --text-dim: #5C5748;
  --text-faint: #8B8575;
  --border: rgba(36,31,23,0.10);
  --border-strong: rgba(36,31,23,0.18);
  --shadow: 0 18px 40px rgba(90,70,40,0.14);
  --stage-glow: radial-gradient(60% 55% at 50% 20%, rgba(199,154,58,0.14), transparent 70%);
}
 
*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
 
body{
  margin: 0;
  background:
    var(--stage-glow),
    radial-gradient(50% 40% at 88% 8%, rgba(79,112,137,0.09), transparent 70%),
    var(--bg);
  background-attachment: fixed;
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.55;
  transition: background .35s var(--ease), color .35s var(--ease);
  overflow-x: hidden;
}
 
h1, h2, h3{ font-family: var(--font-display); font-weight: 600; margin: 0 0 .5em; }
 
/* ==========================================================
   THEME TOGGLE + RESET
   ========================================================== */
#theme-toggle{
  position: fixed;
  top: 22px; right: 24px;
  z-index: 60;
  display: flex; align-items: center; gap: 8px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 999px;
  padding: 9px 16px;
  font-family: var(--font-body);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  cursor: pointer;
  box-shadow: var(--shadow);
}
#theme-toggle:focus-visible, .skip-reset:focus-visible, button:focus-visible{
  outline: 2px solid var(--c-study);
  outline-offset: 2px;
}
.theme-icon{ font-size: 1rem; }
 
.skip-reset{
  position: fixed;
  top: 24px; right: 150px;
  z-index: 60;
  color: var(--text-dim);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  text-decoration: none;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 9px 16px;
  cursor: pointer;
  background: transparent;
}
.skip-reset:hover{ color: var(--text); }
 
/* ==========================================================
   FLOATING AVATAR — fixed to the right edge of the viewport,
   small and gently bobbing, visible across every section.
   ========================================================== */
.floating-avatar{
  position: fixed;
  top: 50%;
  right: 22px;
  z-index: 40;
  width: 160px;          /* was 120px */
  transform: translateY(-50%);
  pointer-events: auto;
  cursor: grab;
  touch-action: none;
  user-select: none;
  filter: drop-shadow(0 10px 20px rgba(0,0,0,0.25));
  animation: avatar-float 5s ease-in-out infinite;
  transition: filter .2s var(--ease);
}
.floating-avatar:active{ cursor: grabbing; }
.floating-avatar.is-dragging{
  cursor: grabbing;
  animation: none;
  filter: drop-shadow(0 16px 30px rgba(0,0,0,0.4));
}
/* Once the user has dropped the avatar somewhere, it keeps that
   left/top position (set inline by script.js) instead of the
   default fixed corner, and stops the idle bob so it doesn't
   drift from where it was placed. */
.floating-avatar.is-positioned{ animation: none; }
#student-svg{
  width: 100%;
  height: auto;
  display: block;
  overflow: visible;
}
@keyframes avatar-float{
  0%, 100%{ transform: translateY(-50%) translateY(0px); }
  50%{ transform: translateY(-50%) translateY(-10px); }
}
 
@media (max-width: 900px){
  .floating-avatar{ width: 112px; right: 12px; top: auto; bottom: 18px; transform: none; animation: avatar-float-mobile 5s ease-in-out infinite; }  /* was 84px */
  .floating-avatar.is-positioned{ animation: none; }
  @keyframes avatar-float-mobile{
    0%, 100%{ transform: translateY(0px); }
    50%{ transform: translateY(-8px); }
  }
}
 
/* ==========================================================
   SECTIONS — shared scaffolding
   ========================================================== */
.story-section{
  padding: 90px 24px;
  display: flex;
  justify-content: center;
}
.section-inner{ width: 100%; max-width: 1080px; }
.section-inner.narrow{ max-width: 660px; }
.section-inner.center{ text-align: center; }
 
/* ==========================================================
   PAGE HEADLINE — sits above the research-question section as
   the title for the whole piece.
   ========================================================== */
.page-header{
  padding: 64px 24px 0;
  text-align: center;
}
.page-headline{
  font-size: clamp(1.8rem, 4.2vw, 3.1rem);
  line-height: 1.18;
  max-width: 900px;
  margin: 0 auto;
  background: linear-gradient(90deg, var(--c-sleep), var(--c-study) 55%, var(--c-social));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
 
/* ==========================================================
   RESEARCH QUESTION — opening section of the page
   ========================================================== */
.research-section{ padding-top: 60px; padding-bottom: 50px; min-height: 52vh; align-items: center; }
 
.research-tag{
  display: inline-block;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--text-faint);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 5px 14px;
  margin-bottom: 24px;
}
 
.research-card{
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-l);
  box-shadow: var(--shadow);
  padding: 64px 56px 60px;
  max-width: 820px;
  margin: 0 auto;
  overflow: hidden;
}
.research-card::before{
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--c-sleep), var(--c-study) 50%, var(--c-social));
}
.research-card .research-tag{ margin-bottom: 22px; }

.research-question{
  font-size: clamp(1.4rem, 3vw, 2.35rem);
  line-height: 1.28;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}
 
.research-intro{
  color: var(--text-dim);
  font-size: 0.95rem;
  max-width: 480px;
  margin: 18px auto 0;
}
 
.site-footer{ text-align:center; padding: 30px 24px 60px; color: var(--text-faint); font-size: 0.76rem; }
 
/* ==========================================================
   DASHBOARD SECTIONS (day clock / pressure profile)
   ========================================================== */
.dashboard-section{ padding-top: 50px; }
.dashboard-title{ font-size: clamp(1.6rem, 3.2vw, 2.3rem); max-width: 640px; }
 
.dashboard-grid{
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 28px;
  margin-top: 36px;
  align-items: start;
}
.dashboard-main{
  display: flex;
  flex-direction: column;
  gap: 20px;
}
 
.chart-card{
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-m);
  box-shadow: var(--shadow);
  padding: 26px 28px 24px;
}
.chart-card-head{
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
}
.chart-card-head h4{
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
}
.chart-card-sub{ font-size: 0.78rem; color: var(--text-faint); }
.chart-card-select{
  background: var(--bg-raised);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: var(--radius-s);
  padding: 6px 10px;
  font-size: 0.78rem;
  font-family: var(--font-body);
}
 
.clock-layout{ display: flex; justify-content: center; }
#day-clock-svg{ width: 100%; max-width: 560px; height: auto; }
 
.radar-layout{ display: grid; grid-template-columns: 1fr 210px; gap: 20px; align-items: center; }
#pressure-radar-svg{ width: 100%; height: auto; }
.radar-table table{ border-collapse: collapse; width: 100%; font-size: 0.76rem; }
.radar-table td{ padding: 6px 6px; border-bottom: 1px solid var(--border); color: var(--text-dim); }
.radar-table .rt-label{ color: var(--text-faint); }
 
.insight-box{
  margin-top: 26px;
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-left: 3px solid var(--c-accent);
  border-radius: var(--radius-s);
  padding: 14px 18px;
  font-size: 0.88rem;
  color: var(--text-dim);
  max-width: 780px;
  min-height: 1px;
}
.insight-box:empty{ display: none; }
 
/* ==========================================================
   MODERN FILTER PANEL
   ========================================================== */
.filter-panel{
  position: sticky;
  top: 100px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-m);
  box-shadow: var(--shadow);
  padding: 22px 20px 20px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.filter-heading{
  font-family: var(--font-body);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--text-faint);
  margin: 0;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}
.filter-group{ display: flex; flex-direction: column; gap: 8px; }
.filter-label{
  font-size: 0.8rem;
  color: var(--text-dim);
  display: flex;
  justify-content: space-between;
  gap: 8px;
}
.filter-label b{ color: var(--text); font-weight: 600; font-variant-numeric: tabular-nums; }
 
.filter-toggle-row{
  display: flex;
  background: var(--bg-sunken);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 3px;
  gap: 2px;
}
.filter-toggle{
  flex: 1;
  appearance: none;
  border: none;
  background: transparent;
  color: var(--text-faint);
  font-family: var(--font-body);
  font-size: 0.72rem;
  font-weight: 600;
  padding: 7px 8px;
  border-radius: 999px;
  cursor: pointer;
  transition: background .2s var(--ease), color .2s var(--ease);
}
.filter-toggle:hover{ color: var(--text); }
.filter-toggle.is-active{ background: var(--c-accent); color: #1A1A16; }
 
.filter-range{
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 4px;
  border-radius: 999px;
  background: var(--bg-sunken);
  outline: none;
  cursor: pointer;
}
.filter-range::-webkit-slider-thumb{
  -webkit-appearance: none;
  appearance: none;
  width: 15px; height: 15px;
  border-radius: 50%;
  background: var(--c-accent);
  border: 2px solid var(--bg-card);
  box-shadow: 0 1px 4px rgba(0,0,0,0.3);
  cursor: pointer;
}
.filter-range::-moz-range-thumb{
  width: 15px; height: 15px;
  border-radius: 50%;
  background: var(--c-accent);
  border: 2px solid var(--bg-card);
  cursor: pointer;
}
 
.filter-select{
  width: 100%;
  background: var(--bg-sunken);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: var(--radius-s);
  padding: 8px 10px;
  font-family: var(--font-body);
  font-size: 0.82rem;
}
 
.filter-reset{
  appearance: none;
  background: transparent;
  border: 1px solid var(--border-strong);
  color: var(--text-dim);
  border-radius: 999px;
  font-size: 0.76rem;
  font-weight: 600;
  padding: 9px 12px;
  cursor: pointer;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}
.filter-reset:hover{ color: var(--text); border-color: var(--text-dim); }
 
.filter-note{
  font-size: 0.72rem;
  color: var(--text-faint);
  margin: 0;
  text-align: center;
}
 
/* ---- Shared tooltip (used by scatter, clock, jitter, radar) ---- */
.viz-tooltip{
  position: fixed;
  pointer-events: none;
  z-index: 200;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-s);
  padding: 8px 12px;
  font-size: 0.78rem;
  color: var(--text);
  box-shadow: var(--shadow);
  opacity: 0;
  transition: opacity .15s var(--ease);
}
.viz-tooltip b{ color: var(--c-study); }
.viz-tooltip .tt-row{ display: flex; justify-content: space-between; gap: 12px; }
 
/* ==========================================================
   ACCESSIBILITY — reduced motion
   ========================================================== */
@media (prefers-reduced-motion: reduce){
  *{ animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
  html{ scroll-behavior: auto; }
}
 
/* ==========================================================
   LARGE SCREENS — laptop / desktop.
   Wider stage, a two-up layout for the clock + scatter pair so
   the page uses the extra horizontal room instead of stretching
   one narrow column down the middle, and everything scales up
   a step so it reads as sized-for-the-screen rather than a phone
   layout stretched wide.
   ========================================================== */
@media (min-width: 1180px){
  .section-inner{ max-width: 1280px; }
  .dashboard-grid{ grid-template-columns: 280px 1fr; gap: 36px; }
  .chart-card{ padding: 32px 34px 30px; }
  .chart-card-head h4{ font-size: 1.22rem; }

}

@media (min-width: 1500px){
  .section-inner{ max-width: 1440px; }
  .dashboard-grid{ grid-template-columns: 300px 1fr; gap: 44px; }
  .story-section{ padding: 110px 40px; }
  .dashboard-section{ padding-top: 60px; }
}
 
/* ==========================================================
   RESPONSIVE — smaller screens
   ========================================================== */
@media (max-width: 900px){
  .dashboard-grid{ grid-template-columns: 1fr; }
  .filter-panel{ position: static; }
  .radar-layout{ grid-template-columns: 1fr; }
}
 
@media (max-width: 600px){
  .story-section{ padding: 60px 16px; }
  .page-header{ padding: 88px 16px 0; }
  .research-section{ padding-top: 40px; }
  #theme-toggle{ top: 14px; right: 14px; padding: 7px 12px; font-size: 0.7rem; }
  .theme-label{ display:none; }
  .skip-reset{ top: 14px; right: 60px; padding: 7px 12px; font-size: 0.7rem; }
}

:root {
  /* Colors - Dark Theme */
  --bg-base: #0b0f19;
  --bg-panel: #151c2e;
  --bg-panel-hover: #1e293b;
  --border-color: #2a364f;
  --text-main: #f1f5f9;
  --text-muted: #94a3b8;
  
  /* Accents */
  --c-cyan: #38bdf8;
  --c-purple: #c084fc;
  --c-rose: #fb7185;
  --c-emerald: #34d399;
  --c-amber: #fbbf24;
  --c-blue: #3b82f6;

  /* Typography */
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-display: 'Outfit', system-ui, -apple-system, sans-serif;

  /* Layout */
  --sidebar-w: 280px;
  --header-h: 80px;
  --border-radius: 12px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  background-color: var(--bg-base);
  color: var(--text-main);
  font-family: var(--font-sans);
  line-height: 1.5;
  overflow: hidden; /* App-like feel */
  -webkit-font-smoothing: antialiased;
}

/* Ambient Background Blobs for Glassmorphism feel */
.bg-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  z-index: -1;
  opacity: 0.15;
}
.bg-blob--1 {
  width: 400px;
  height: 400px;
  background: var(--c-cyan);
  top: -100px;
  left: 20%;
}
.bg-blob--2 {
  width: 300px;
  height: 300px;
  background: var(--c-purple);
  bottom: 10%;
  right: 10%;
}
.bg-blob--3 {
  width: 250px;
  height: 250px;
  background: var(--c-rose);
  top: 30%;
  left: -50px;
}

/* App Shell Grid */
.app-shell {
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr;
  height: 100vh;
}

/* ================== SIDEBAR ================== */
.sidebar {
  background-color: var(--bg-panel);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  padding: 1.5rem;
  gap: 2rem;
  overflow-y: auto;
  z-index: 10;
}
.sidebar::-webkit-scrollbar {
  width: 6px;
}
.sidebar::-webkit-scrollbar-track {
  background: transparent;
}
.sidebar::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 4px;
}

.sidebar__brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.sidebar__brand-icon {
  width: 32px;
  height: 32px;
  color: var(--c-cyan);
}
.sidebar__brand-title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1.1;
}
.sidebar__brand-sub {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Active Count Card */
.stat-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 1.25rem;
  text-align: center;
}
.stat-card__label {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 0.25rem;
}
.stat-card__value {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1;
  margin-bottom: 0.25rem;
}
.stat-card__sub {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
}
.stat-card__bar {
  height: 6px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 3px;
  overflow: hidden;
}
.stat-card__bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--c-cyan), var(--c-purple));
  width: 0%;
  transition: width 1s ease-out;
}

/* Filter Groups */
.filter-group {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.filter-group__header {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.filter-group__icon {
  width: 16px;
  height: 16px;
}
.pill-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.pill {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 0.375rem 0.75rem;
  border-radius: 99px;
  font-size: 0.8125rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
}
.pill:hover {
  background: rgba(255, 255, 255, 0.1);
}
.pill--active {
  background: var(--c-blue);
  border-color: var(--c-blue);
  color: #fff;
}

/* Legend Section */
.legend-section {
  background: rgba(255, 255, 255, 0.02);
  border-radius: 8px;
  padding: 1rem;
}
.legend-section__title {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}
.legend-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.legend-item {
  font-size: 0.8125rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-muted);
}
.legend-item__color {
  display: inline-block;
  width: 12px;
  height: 12px;
  border-radius: 3px;
}

.sidebar__footer {
  margin-top: auto;
  font-size: 0.75rem;
  color: var(--text-muted);
  text-align: center;
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
}

/* ================== MAIN CONTENT ================== */
.main-content {
  display: flex;
  flex-direction: column;
  height: 100vh;
  padding: 1.5rem 2rem;
  gap: 1.5rem;
  overflow-y: auto;
}

/* Page Header */
.page-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
}
.page-header__title {
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}
.page-header__subtitle {
  color: var(--text-muted);
  font-size: 0.9375rem;
}
.page-header__research-q {
  color: var(--c-cyan);
  font-size: 0.875rem;
  font-style: italic;
  margin-top: 0.25rem;
}
.page-header__controls {
  display: flex;
  gap: 1.5rem;
}
.align-control {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}
.align-control__label {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  font-weight: 600;
  letter-spacing: 0.05em;
}

/* Segmented Control */
.seg-control {
  display: flex;
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  overflow: hidden;
}
.seg-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  padding: 0.375rem 0.75rem;
  font-size: 0.8125rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
}
.seg-btn:hover {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.05);
}
.seg-btn--active {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-main);
}

/* Stage Labels Bar */
.stage-labels {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  padding: 0.75rem 1rem;
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
}
.stage-label {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.stage-label__num {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-muted);
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 4px;
  font-size: 0.75rem;
  font-family: var(--font-display);
  font-weight: 700;
}
.stage-label__name {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-main);
}

/* Chart Card */
.chart-card {
  flex: 1;
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  position: relative;
  overflow: hidden;
  box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
  display: flex;
  flex-direction: column;
}

.chart-loader {
  position: absolute;
  inset: 0;
  background: rgba(21, 28, 46, 0.9);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 20;
  gap: 1rem;
  font-size: 0.875rem;
  color: var(--text-muted);
  transition: opacity 0.3s;
}
.spinner {
  width: 32px;
  height: 32px;
  border: 3px solid rgba(255, 255, 255, 0.1);
  border-top-color: var(--c-cyan);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}
@keyframes spin { 100% { transform: rotate(360deg); } }

.chart-wrapper {
  flex: 1;
  width: 100%;
  height: 100%;
  padding: 1rem;
}
.chart-wrapper svg {
  width: 100%;
  height: 100%;
  display: block;
}

/* Bottom Mini-Stats */
.mini-stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}
.mini-stat {
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 1rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}
.mini-stat__icon {
  width: 40px;
  height: 40px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.mini-stat__icon svg {
  width: 20px;
  height: 20px;
}
.ms-cyan { background: rgba(56, 189, 248, 0.1); color: var(--c-cyan); }
.ms-rose { background: rgba(251, 113, 133, 0.1); color: var(--c-rose); }
.ms-emerald { background: rgba(52, 211, 153, 0.1); color: var(--c-emerald); }
.ms-amber { background: rgba(251, 191, 36, 0.1); color: var(--c-amber); }

.mini-stat__label {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  font-weight: 600;
  letter-spacing: 0.05em;
  margin-bottom: 0.125rem;
}
.mini-stat__value {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1;
}

/* ================== D3 SVG STYLES ================== */
.node-rect {
  cursor: pointer;
  transition: opacity 0.2s;
}
.node-rect:hover {
  filter: brightness(1.2);
}
.node-label {
  font-family: var(--font-sans);
  font-size: 11px;
  font-weight: 500;
  fill: var(--text-main);
  pointer-events: none;
  text-shadow: 0 1px 3px rgba(0,0,0,0.8);
}
.link-path {
  cursor: pointer;
  transition: stroke-opacity 0.2s, stroke-width 0.2s;
}
.link-path:hover {
  stroke-opacity: 0.85 !important;
}

/* Hover effects */
.chart-wrapper.dimming .node-rect {
  opacity: 0.2;
}
.chart-wrapper.dimming .node-rect.highlight {
  opacity: 1;
}
.chart-wrapper.dimming .link-path {
  stroke-opacity: 0.05 !important;
}
.chart-wrapper.dimming .link-path.highlight {
  stroke-opacity: 0.75 !important;
}

/* ================== TOOLTIP ================== */
.tooltip {
  position: absolute;
  top: 0;
  left: 0;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.15s, transform 0.1s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 100;
  will-change: transform;
}
.tooltip.show {
  opacity: 1;
}
.tooltip__inner {
  background: rgba(15, 23, 42, 0.95);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.5);
  border-radius: 8px;
  padding: 0.75rem 1rem;
  font-size: 0.8125rem;
  color: var(--text-main);
  min-width: 200px;
}
.tooltip-header {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.9375rem;
  margin-bottom: 0.375rem;
  padding-bottom: 0.375rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}
.tooltip-row {
  display: flex;
  justify-content: space-between;
  margin-bottom: 0.25rem;
}
.tooltip-label {
  color: var(--text-muted);
}
.tooltip-value {
  font-weight: 600;
}