/* ============================================================
   IMMUNE RESEARCH CIC — STYLES
   Tokens, base, themes, components.
   Themes are pure CSS attribute selectors on <html>.
   JS only sets data-theme / data-textsize / data-layout.
   ============================================================ */

/* ─── TOKENS: colours (semantic) ─────────────────────────────── */
:root {
  --colour-bg:            #fdf9f3;
  --colour-surface:       #ffffff;
  --colour-surface-alt:   #f0e6fa;
  --colour-text:          #2f2440;
  --colour-text-muted:    #6b5f80;
  --colour-accent:        #7c5bd4;
  --colour-accent-dark:   #6849bd;
  --colour-accent-text:   #ffffff;
  --colour-border:        rgba(47, 36, 64, 0.12);
  --colour-focus:         #7c5bd4;

  --colour-hero:          #c9b8e8;
  --colour-hero-text:     #3d3254;
  --colour-nav-bg:        #ffffff;
  --colour-nav-active:    #7c5bd4;
  --colour-chip-bg:       rgba(255, 255, 255, 0.75);
  --colour-icon-bg:       rgba(255, 255, 255, 0.72);

  --colour-soft-purple:   #f0e6fa;
  --colour-soft-coral:    #fce8e2;
  --colour-soft-mint:     #e2f2ec;
  --colour-soft-butter:   #fdf3d9;

  --colour-donate-bg:     #fce8e2;
  --colour-donate-text:   #7a3a2a;
  --colour-donate-amount: #ffffff;
  --colour-donate-sel-bg: #e8836b;
  --colour-donate-sel-fg: #ffffff;
}

/* ─── TOKENS: spacing, radii, shadows ────────────────────────── */
:root {
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 2.75rem;
  --space-8: 4rem;

  --radius-xs: 3px;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --radius-xl: 12px;
  --radius-pill: 999px;
  --radius: var(--radius-md);

  --shadow-xs: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-sm: 0 2px 8px -4px rgba(0,0,0,0.12);
}

/* ─── TOKENS: typography ─────────────────────────────────────── */
:root {
  --font-family-base: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-family-mono: ui-monospace, SFMono-Regular, Menlo, monospace;

  --font-size-base: 1rem;
  --font-size-sm:   calc(var(--font-size-base) * 0.875);
  --font-size-lg:   calc(var(--font-size-base) * 1.125);
  --font-size-xl:   calc(var(--font-size-base) * 1.35);
  --font-size-2xl:  calc(var(--font-size-base) * 1.7);

  --line-height-base: 1.55;
  --line-height-tight: 1.25;
}

/* ─── TEXT SIZE THEMES ──────────────────────────────────────── */
:root[data-textsize="sm"] { --font-size-base: 0.88rem; }
:root[data-textsize="md"] { --font-size-base: 1rem;    }
:root[data-textsize="lg"] { --font-size-base: 1.15rem; }
:root[data-textsize="xl"] { --font-size-base: 1.35rem; }

/* ─── COLOUR THEMES ─────────────────────────────────────────── */
:root[data-theme="ocean"] {
  --colour-bg:            #f0f7fc;
  --colour-surface:       #ffffff;
  --colour-surface-alt:   #e0f2fe;
  --colour-text:          #0f2942;
  --colour-text-muted:    #5a7080;
  --colour-accent:        #0284c7;
  --colour-accent-dark:   #0369a1;
  --colour-accent-text:   #ffffff;
  --colour-border:        rgba(2, 132, 199, 0.15);
  --colour-focus:         #0284c7;

  --colour-hero:          #a8cfe8;
  --colour-hero-text:     #1e4976;
  --colour-nav-bg:        #ffffff;
  --colour-nav-active:    #0284c7;
  --colour-chip-bg:       rgba(255, 255, 255, 0.85);
  --colour-icon-bg:       rgba(255, 255, 255, 0.85);

  --colour-soft-purple:   #e0f2fe;
  --colour-soft-coral:    #fce7f3;
  --colour-soft-mint:     #dcfce7;
  --colour-soft-butter:   #fef9c3;

  --colour-donate-bg:     #e0f2fe;
  --colour-donate-text:   #1e4976;
  --colour-donate-amount: #ffffff;
  --colour-donate-sel-bg: #0284c7;
  --colour-donate-sel-fg: #ffffff;
}

:root[data-theme="electric"] {
  --colour-bg:            #0a0a0f;
  --colour-surface:       #0f0f18;
  --colour-surface-alt:   #0d1b2a;
  --colour-text:          #e8f4ff;
  --colour-text-muted:    #8fa8c0;
  --colour-accent:        #00d4ff;
  --colour-accent-dark:   #00a8cc;
  --colour-accent-text:   #000000;
  --colour-border:        rgba(0, 212, 255, 0.22);
  --colour-focus:         #00d4ff;

  --colour-hero:          #0a0a0f;
  --colour-hero-text:     #8fb8d4;
  --colour-nav-bg:        #0a0a0f;
  --colour-nav-active:    #00d4ff;
  --colour-chip-bg:       rgba(0, 212, 255, 0.12);
  --colour-icon-bg:       rgba(0, 212, 255, 0.12);

  --colour-soft-purple:   #0d1b2a;
  --colour-soft-coral:    #1a0d1a;
  --colour-soft-mint:     #0d1a1a;
  --colour-soft-butter:   #1a1400;

  --colour-donate-bg:     #0d1b2a;
  --colour-donate-text:   #b0d4e8;
  --colour-donate-amount: #0f0f18;
  --colour-donate-sel-bg: #00d4ff;
  --colour-donate-sel-fg: #000000;
}

:root[data-theme="bw"] {
  --colour-bg:            #000000;
  --colour-surface:       #1a1a1a;
  --colour-surface-alt:   #1f1f1f;
  --colour-text:          #ffffff;
  --colour-text-muted:    #d0d0d0;
  --colour-accent:        #ffffff;
  --colour-accent-dark:   #e0e0e0;
  --colour-accent-text:   #000000;
  --colour-border:        rgba(255, 255, 255, 0.18);
  --colour-focus:         #ffffff;

  --colour-hero:          #111111;
  --colour-hero-text:     #cccccc;
  --colour-nav-bg:        #141414;
  --colour-nav-active:    #ffffff;
  --colour-chip-bg:       #333333;
  --colour-icon-bg:       #2a2a2a;

  --colour-soft-purple:   #1f1f1f;
  --colour-soft-coral:    #1f1f1f;
  --colour-soft-mint:     #1f1f1f;
  --colour-soft-butter:   #1f1f1f;

  --colour-donate-bg:     #1f1f1f;
  --colour-donate-text:   #d0d0d0;
  --colour-donate-amount: #2a2a2a;
  --colour-donate-sel-bg: #ffffff;
  --colour-donate-sel-fg: #000000;
}

:root[data-theme="wb"] {
  --colour-bg:            #ffffff;
  --colour-surface:       #f5f5f5;
  --colour-surface-alt:   #eeeeee;
  --colour-text:          #000000;
  --colour-text-muted:    #333333;
  --colour-accent:        #000000;
  --colour-accent-dark:   #222222;
  --colour-accent-text:   #ffffff;
  --colour-border:        rgba(0, 0, 0, 0.15);
  --colour-focus:         #000000;

  --colour-hero:          #f0f0f0;
  --colour-hero-text:     #333333;
  --colour-nav-bg:        #ffffff;
  --colour-nav-active:    #000000;
  --colour-chip-bg:       #ffffff;
  --colour-icon-bg:       #dddddd;

  --colour-soft-purple:   #eeeeee;
  --colour-soft-coral:    #eeeeee;
  --colour-soft-mint:     #eeeeee;
  --colour-soft-butter:   #eeeeee;

  --colour-donate-bg:     #eeeeee;
  --colour-donate-text:   #333333;
  --colour-donate-amount: #ffffff;
  --colour-donate-sel-bg: #000000;
  --colour-donate-sel-fg: #ffffff;
}

:root[data-theme="grey"] {
  --colour-bg:            #2b2b2b;
  --colour-surface:       #3a3a3a;
  --colour-surface-alt:   #454545;
  --colour-text:          #ffffff;
  --colour-text-muted:    #d4d4d4;
  --colour-accent:        #ffffff;
  --colour-accent-dark:   #e0e0e0;
  --colour-accent-text:   #000000;
  --colour-border:        rgba(255, 255, 255, 0.18);
  --colour-focus:         #ffffff;

  --colour-hero:          #1e1e1e;
  --colour-hero-text:     #cfcfcf;
  --colour-nav-bg:        #1a1a1a;
  --colour-nav-active:    #ffffff;
  --colour-chip-bg:       #333333;
  --colour-icon-bg:       #2f2f2f;

  --colour-soft-purple:   #454545;
  --colour-soft-coral:    #454545;
  --colour-soft-mint:     #454545;
  --colour-soft-butter:   #454545;

  --colour-donate-bg:     #454545;
  --colour-donate-text:   #d4d4d4;
  --colour-donate-amount: #2f2f2f;
  --colour-donate-sel-bg: #ffffff;
  --colour-donate-sel-fg: #000000;
}

/* ─── LAYOUT THEMES ─────────────────────────────────────────── */
:root[data-layout="spacious"] {
  --space-3: 1rem;
  --space-4: 1.4rem;
  --space-5: 2rem;
  --space-6: 2.6rem;
  --radius: var(--radius-lg);
}

:root[data-layout="glass"] {
  --colour-surface: rgba(255, 255, 255, 0.55);
  --colour-surface-alt: rgba(124, 91, 212, 0.18);
  --shadow-sm: 0 4px 20px -6px rgba(0, 0, 0, 0.18);
}
:root[data-theme="electric"][data-layout="glass"],
:root[data-theme="bw"][data-layout="glass"],
:root[data-theme="grey"][data-layout="glass"] {
  --colour-surface: rgba(255, 255, 255, 0.08);
  --colour-surface-alt: rgba(0, 212, 255, 0.15);
}

/* ─── RESET & BASE ──────────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
  -webkit-tap-highlight-color: transparent;
}

html, body {
  scrollbar-width: none;
  -ms-overflow-style: none;
}
::-webkit-scrollbar { width: 0 !important; height: 0 !important; display: none !important; }

body {
  background: var(--colour-bg);
  color: var(--colour-text);
  height: 100dvh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  line-height: var(--line-height-base);
}

button { font: inherit; color: inherit; }

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

:focus-visible {
  outline: 2px solid var(--colour-focus);
  outline-offset: 2px;
  border-radius: var(--radius-xs);
}

/* ─── SHARED COMPONENTS ─────────────────────────────────────── */

.app-shell {
  display: flex;
  flex-direction: column;
  height: 100dvh;
  width: 100%;
  position: relative;
  overflow: hidden;
}
#main-scroll {
  flex: 1;
  position: relative;
  overflow-y: auto;
  overflow-x: hidden;
  -webkit-overflow-scrolling: touch;
  padding-bottom: 100px;
}
.content {
  padding: var(--space-6) var(--space-4) var(--space-3);
  max-width: 620px;
  margin: 0 auto;
}

.btn {
  border: 0;
  padding: 15px 20px;
  border-radius: var(--radius-sm);
  font-weight: 800;
  font-size: var(--font-size-sm);
  cursor: pointer;
  width: 100%;
  font-family: inherit;
  background: transparent;
  color: var(--colour-text);
}
.btn-primary   { background: var(--colour-accent); color: var(--colour-accent-text); }
.btn-secondary { background: var(--colour-text);   color: var(--colour-bg); }
.btn-ghost     { background: transparent; color: var(--colour-text); font-weight: 700; text-decoration: underline; padding: 10px; }

.section-title { font-size: var(--font-size-xl); font-weight: 800; margin-bottom: var(--space-1); color: var(--colour-text); }
.section-sub   { font-size: var(--font-size-sm); color: var(--colour-text-muted); line-height: 1.55; margin-bottom: var(--space-5); }

.pillar-tag, .goal-label, .badge {
  display: inline-block;
  font-size: 0.66rem;
  font-weight: 800;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  background: var(--colour-chip-bg);
  color: var(--colour-text);
  padding: 6px 12px;
  border-radius: var(--radius-pill);
}

.hero {
  background: var(--colour-hero);
  padding: var(--space-7) var(--space-5) var(--space-7);
  text-align: center;
  border-bottom-left-radius: var(--radius-xl);
  border-bottom-right-radius: var(--radius-xl);
}
.hero-inner { position: relative; z-index: 2; }
.hero-logo-wrap {
  width: 140px; height: 140px;
  margin: 0 auto var(--space-5);
  border: 2px dashed var(--colour-border);
  border-radius: 14px;
}
.hero-title {
  font-size: var(--font-size-2xl);
  font-weight: 800;
  line-height: var(--line-height-tight);
  margin-bottom: var(--space-3);
  color: var(--colour-text);
}
.hero-title span { color: var(--colour-accent); display: block; margin-top: 6px; }
.hero-sub {
  max-width: 400px;
  margin: 0 auto var(--space-5);
  color: var(--colour-hero-text);
  font-size: var(--font-size-base);
  line-height: 1.55;
  font-weight: 500;
}
.hero-btns {
  max-width: 360px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.card {
  background: var(--colour-surface);
  border-radius: var(--radius);
  padding: var(--space-5) var(--space-4);
}

.welcome {
  background: var(--colour-soft-purple);
  border-radius: var(--radius);
  padding: var(--space-5) var(--space-4);
  margin-bottom: var(--space-6);
}
.welcome .hello { font-size: var(--font-size-2xl); display: inline-block; margin-bottom: var(--space-2); }
.welcome h3 { font-weight: 800; font-size: var(--font-size-lg); margin-bottom: var(--space-3); }
.welcome p { font-size: var(--font-size-sm); color: var(--colour-text-muted); line-height: 1.65; margin-bottom: var(--space-3); }
.welcome strong { color: var(--colour-accent); font-weight: 800; }

.pillars-home { margin-bottom: var(--space-6); }
.pillar-card-home {
  display: block;
  width: 100%;
  background: none;
  border: none;
  padding: 0;
  margin-bottom: var(--space-6);
  cursor: pointer;
  text-align: left;
  font-family: inherit;
  color: inherit;
}
.pillar-square {
  position: relative;
  width: 100%;
  aspect-ratio: 1/1;
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  padding: var(--space-6) var(--space-5);
}
.pillar-square .pillar-tag { position: absolute; top: var(--space-5); left: var(--space-5); }
.pillar-square .pillar-icon {
  width: 88px; height: 88px;
  border-radius: var(--radius-lg);
  background: var(--colour-icon-bg);
  display: grid; place-items: center;
}
.pillar-square .pillar-icon svg { width: 44px; height: 44px; }
.pillar-square h3 { font-size: var(--font-size-xl); font-weight: 800; color: var(--colour-text); text-align: center; }
.pillar-desc { margin-top: var(--space-3); font-size: var(--font-size-sm); color: var(--colour-text-muted); line-height: 1.6; }
.pillar-desc .read-more { display: inline-block; margin-top: var(--space-2); color: var(--colour-accent); font-weight: 800; font-size: var(--font-size-sm); }

.pillar-card-home.t1 .pillar-square { background: var(--colour-soft-purple); }
.pillar-card-home.t1 .pillar-icon svg  { fill: var(--colour-accent); }
.pillar-card-home.t2 .pillar-square { background: var(--colour-soft-mint); }
.pillar-card-home.t2 .pillar-icon svg  { fill: #6fbfa0; }
.pillar-card-home.t3 .pillar-square { background: var(--colour-soft-coral); }
.pillar-card-home.t3 .pillar-icon svg  { fill: #e8836b; }
.pillar-card-home.t4 .pillar-square { background: var(--colour-soft-butter); }
.pillar-card-home.t4 .pillar-icon svg  { fill: #c99b2f; }

.big-goal {
  background: var(--colour-soft-butter);
  border-radius: var(--radius);
  padding: var(--space-5) var(--space-4);
  margin-bottom: var(--space-5);
  cursor: pointer;
}
.big-goal .goal-label { margin-bottom: var(--space-3); }
.big-goal h3 { font-weight: 800; font-size: var(--font-size-lg); margin-bottom: var(--space-2); }
.big-goal p  { font-size: var(--font-size-sm); color: var(--colour-text-muted); line-height: 1.6; }

.closing {
  text-align: center;
  font-size: var(--font-size-sm);
  color: var(--colour-text-muted);
  line-height: 1.65;
  margin-bottom: var(--space-6);
  padding: var(--space-4) var(--space-5);
  background: var(--colour-soft-mint);
  border-radius: var(--radius);
  font-weight: 500;
}
.closing strong { color: var(--colour-text); }

.diseases { margin-bottom: var(--space-7); }
.disease-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-2); }
.disease-chip {
  background: var(--colour-surface);
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  padding: var(--space-3) var(--space-4);
  font-size: var(--font-size-sm);
  font-weight: 700;
  color: var(--colour-text);
  text-align: left;
  cursor: pointer;
  font-family: inherit;
}
.disease-chip:hover {
  background: var(--colour-soft-purple);
  border-color: var(--colour-accent);
}
.disease-chip.disease-hidden { display: none; }
.more-illnesses-btn {
  display: block;
  margin: var(--space-4) auto 0;
  background: var(--colour-soft-purple);
  border: none;
  color: var(--colour-text);
  font-weight: 800;
  font-size: var(--font-size-sm);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-family: inherit;
}

.home-section { margin-bottom: var(--space-7); }
.contact-card { background: var(--colour-surface); border-radius: var(--radius); padding: var(--space-5) var(--space-4); }
.contact-card p.intro { font-size: var(--font-size-sm); color: var(--colour-text-muted); line-height: 1.6; margin-bottom: var(--space-4); }

.home-input, .home-textarea, .modal-input, .modal-textarea {
  width: 100%;
  padding: var(--space-4);
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  background: var(--colour-soft-purple);
  color: var(--colour-text);
  font-family: inherit;
  font-size: var(--font-size-base);
  outline: none;
  margin-bottom: var(--space-2);
}
.modal-input, .modal-textarea { background: var(--colour-surface); }
.home-textarea, .modal-textarea { resize: vertical; min-height: 100px; }

.social-section { margin-bottom: var(--space-7); }
.social-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-3); }
.social-tile {
  aspect-ratio: 1/1;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: grid;
  place-items: center;
  padding: 0;
}
.social-tile svg { width: 52%; height: 52%; fill: #fff; }
.social-facebook  { background: #1877f2; }
.social-instagram { background: #e1306c; }
.social-youtube   { background: #ff0000; }
.social-tiktok    { background: #000000; }
.social-x         { background: #000000; }
.social-linkedin  { background: #0a66c2; }
.social-handle {
  text-align: center;
  margin-top: var(--space-3);
  font-size: var(--font-size-sm);
  color: var(--colour-text-muted);
  font-weight: 600;
}

.best-way-card {
  background: var(--colour-soft-mint);
  border-radius: var(--radius);
  padding: var(--space-5) var(--space-4);
  margin-bottom: var(--space-5);
}
.best-way-title { font-size: var(--font-size-lg); font-weight: 800; margin-bottom: var(--space-3); }
.best-way-intro { font-size: var(--font-size-sm); color: var(--colour-text-muted); line-height: 1.65; margin-bottom: var(--space-3); }
.best-way-points { list-style: none; padding: 0; margin: 0 0 var(--space-4); }
.best-way-points li {
  font-size: var(--font-size-sm);
  line-height: 1.5;
  padding-left: 24px;
  position: relative;
  margin-bottom: var(--space-2);
}
.best-way-points li::before {
  content: "✓";
  position: absolute;
  left: 0; top: 0;
  color: #6fbfa0;
  font-weight: 800;
}

.donate-divider {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin: var(--space-5) 0 var(--space-4);
  color: var(--colour-text-muted);
  font-size: var(--font-size-sm);
  font-weight: 800;
  text-transform: uppercase;
}
.donate-divider::before,
.donate-divider::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--colour-border);
}
.donate-card {
  background: var(--colour-donate-bg);
  border-radius: var(--radius);
  padding: var(--space-5) var(--space-4);
  text-align: center;
}
.donate-card .kind-note {
  background: var(--colour-surface);
  border-radius: var(--radius-sm);
  padding: var(--space-4) var(--space-5);
  margin-bottom: var(--space-5);
  text-align: left;
}
.donate-card .kind-note p { font-size: var(--font-size-sm); color: var(--colour-donate-text); line-height: 1.6; margin-bottom: var(--space-2); }
.donate-card .kind-note strong { color: var(--colour-text); font-weight: 800; }
.donate-card .give-if { font-size: var(--font-size-sm); color: var(--colour-donate-text); font-weight: 700; margin-bottom: var(--space-4); }
.donate-amounts { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-3); margin-bottom: var(--space-4); }
.donate-amount {
  background: var(--colour-donate-amount);
  border: 2px solid transparent;
  border-radius: var(--radius-sm);
  padding: var(--space-4) var(--space-2);
  font-weight: 800;
  font-size: var(--font-size-base);
  cursor: pointer;
  color: var(--colour-text);
  font-family: inherit;
}
.donate-amount.selected {
  background: var(--colour-donate-sel-bg);
  color: var(--colour-donate-sel-fg);
  border-color: var(--colour-donate-sel-bg);
}

.footer {
  margin-top: var(--space-7);
  padding: var(--space-5) var(--space-1) var(--space-5);
  border-top: 1px solid var(--colour-border);
  text-align: center;
}
.footer-brand { font-size: var(--font-size-base); font-weight: 800; color: var(--colour-text); }
.footer-brand span {
  display: block;
  font-size: 0.68rem;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--colour-text-muted);
  font-weight: 700;
  margin-top: var(--space-1);
}
.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-2) var(--space-5);
  margin: var(--space-5) 0 0;
}
.footer-link {
  background: none; border: none; padding: 0;
  color: var(--colour-text-muted);
  font-size: var(--font-size-sm);
  cursor: pointer;
  font-family: inherit;
}
.copyright {
  margin-top: var(--space-5);
  padding-top: var(--space-4);
  border-top: 1px solid var(--colour-border);
  font-size: var(--font-size-sm);
  line-height: 1.6;
  color: var(--colour-text-muted);
}

.bottom-nav {
  position: fixed;
  bottom: 0; left: 0;
  width: 100%;
  height: calc(72px + env(safe-area-inset-bottom, 0px));
  padding-bottom: env(safe-area-inset-bottom, 0px);
  background: var(--colour-nav-bg);
  color: var(--colour-text);
  display: flex;
  justify-content: space-around;
  align-items: center;
  z-index: 1900;
  box-shadow: 0 -2px 12px rgba(0, 0, 0, 0.08);
}
.nav-btn {
  background: none;
  border: none;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  flex: 1;
  height: 100%;
  color: var(--colour-text-muted);
  font-size: 0.62rem;
  font-weight: 800;
  cursor: pointer;
  font-family: inherit;
  position: relative;
}
.nav-btn svg { width: 22px; height: 22px; fill: currentColor; }
.nav-btn.active { color: var(--colour-nav-active); }
.nav-badge {
  position: absolute;
  top: 6px;
  right: calc(50% - 14px);
  background: #e8836b;
  color: #fff;
  font-size: 0.56rem;
  font-weight: 800;
  min-width: 16px;
  height: 16px;
  padding: 0 4px;
  border-radius: var(--radius-pill);
  display: grid;
  place-items: center;
}

#menu-overlay {
  position: fixed;
  inset: 0;
  background: var(--colour-bg);
  z-index: 1850;
  display: flex;
  flex-direction: column;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}
#menu-overlay.active { opacity: 1; pointer-events: auto; }
.menu-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-5) var(--space-5);
}
.menu-header h2 { font-size: var(--font-size-xl); font-weight: 800; }
.menu-close {
  background: var(--colour-soft-purple);
  border: none;
  width: 42px; height: 42px;
  border-radius: var(--radius-sm);
  font-size: var(--font-size-xl);
  cursor: pointer;
  display: grid;
  place-items: center;
  font-family: inherit;
  color: var(--colour-text);
}
.menu-body {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-2) var(--space-5) 100px;
}

.profile-card {
  background: var(--colour-surface);
  border-radius: var(--radius);
  padding: var(--space-5) var(--space-4);
  margin-bottom: var(--space-6);
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}
.profile-section-title {
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 1.6px;
  text-transform: uppercase;
  color: var(--colour-accent);
  margin-bottom: var(--space-4);
}
.profile-avatar {
  width: 84px; height: 84px;
  border-radius: 50%;
  background: var(--colour-soft-purple);
  display: grid;
  place-items: center;
  margin: 0 auto var(--space-4);
  font-weight: 800;
  font-size: var(--font-size-xl);
  color: var(--colour-accent);
  overflow: hidden;
}
.profile-avatar img { width: 100%; height: 100%; object-fit: cover; border-radius: 50%; }
.profile-avatar svg { display: block; }
.profile-rows { display: flex; flex-direction: column; gap: var(--space-3); }
.profile-row { display: flex; align-items: center; justify-content: center; gap: var(--space-2); flex-wrap: wrap; font-size: var(--font-size-base); }
.profile-row .value { font-weight: 800; color: var(--colour-text); }
.profile-row .label { font-size: var(--font-size-sm); color: var(--colour-text-muted); font-weight: 600; }
.badge.private { background: var(--colour-soft-coral); color: var(--colour-text); }
.badge.public  { background: var(--colour-soft-mint);  color: var(--colour-text); }

.menu-section-label {
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 1.4px;
  text-transform: uppercase;
  color: var(--colour-text-muted);
  margin: var(--space-5) auto var(--space-3);
  max-width: 500px;
  padding-left: var(--space-1);
}
.square-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
  max-width: 500px;
  margin: 0 auto;
}
.square-tile {
  position: relative;
  background: var(--colour-surface);
  border: none;
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
  text-align: center;
  aspect-ratio: 1/1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-family: inherit;
  padding: var(--space-4);
  gap: var(--space-3);
  color: var(--colour-text);
}
.square-tile .tile-icon {
  width: 56px; height: 56px;
  border-radius: var(--radius-md);
  background: var(--colour-icon-bg);
  display: grid;
  place-items: center;
}
.square-tile .tile-icon svg { width: 30px; height: 30px; }
.square-tile .tile-title { font-weight: 800; font-size: var(--font-size-sm); color: var(--colour-text); line-height: 1.25; padding: 0 var(--space-1); }

.square-tile.t1, .square-tile.e1, .square-tile.x1 { background: var(--colour-soft-purple); }
.square-tile.t1 .tile-icon svg, .square-tile.e1 .tile-icon svg, .square-tile.x1 .tile-icon svg { fill: var(--colour-accent); }
.square-tile.t2, .square-tile.e2, .square-tile.x2 { background: var(--colour-soft-mint); }
.square-tile.t2 .tile-icon svg, .square-tile.e2 .tile-icon svg, .square-tile.x2 .tile-icon svg { fill: #6fbfa0; }
.square-tile.t3, .square-tile.e3, .square-tile.x3 { background: var(--colour-soft-coral); }
.square-tile.t3 .tile-icon svg, .square-tile.e3 .tile-icon svg, .square-tile.x3 .tile-icon svg { fill: #e8836b; }
.square-tile.t4, .square-tile.e4, .square-tile.x4 { background: var(--colour-soft-butter); }
.square-tile.t4 .tile-icon svg, .square-tile.e4 .tile-icon svg, .square-tile.x4 .tile-icon svg { fill: #c99b2f; }

#sub-app {
  position: fixed;
  inset: 0;
  background: var(--colour-bg);
  z-index: 1800;
  display: flex;
  flex-direction: column;
  transform: translateY(100%);
  transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1);
  pointer-events: none;
}
#sub-app.active { transform: translateY(0); pointer-events: auto; }
.sub-topbar {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-4) var(--space-4);
  color: var(--colour-text);
}
.sub-title-block { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 2px; }
.sub-title {
  font-weight: 800;
  font-size: var(--font-size-lg);
  color: var(--colour-text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.sub-tab-label {
  font-size: var(--font-size-sm);
  font-weight: 700;
  color: var(--colour-text-muted);
}
.sub-back {
  background: var(--colour-nav-bg);
  border: none;
  width: 42px; height: 42px;
  border-radius: var(--radius-sm);
  font-size: var(--font-size-lg);
  font-weight: 800;
  cursor: pointer;
  color: var(--colour-text);
  display: grid;
  place-items: center;
  font-family: inherit;
  margin-left: auto;
}
.sub-back svg { width: 20px; height: 20px; fill: currentColor; }
#sub-viewport { flex: 1; overflow: hidden; position: relative; min-height: 0; }
#subTrack {
  display: flex;
  height: 100%;
  transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1);
}
.sub-panel {
  width: 100vw;
  height: 100%;
  flex-shrink: 0;
  overflow-y: auto;
  overflow-x: hidden;
  padding: var(--space-5) var(--space-4) 110px;
  -webkit-overflow-scrolling: touch;
}
.sub-panel-inner { max-width: 620px; margin: 0 auto; }
.sub-panel h2 { font-size: var(--font-size-xl); font-weight: 800; color: var(--colour-text); margin-bottom: var(--space-3); }
.sub-panel p { color: var(--colour-text-muted); font-size: var(--font-size-base); line-height: 1.65; margin-bottom: var(--space-3); }
.sub-panel .placeholder {
  background: var(--colour-surface);
  border-radius: var(--radius);
  padding: var(--space-5) var(--space-4);
  text-align: center;
  color: var(--colour-text-muted);
  font-size: var(--font-size-sm);
  line-height: 1.6;
  margin-top: var(--space-3);
}

.disease-pillars-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-2); margin-top: var(--space-4); }
.disease-pillar-tile {
  aspect-ratio: 1/1;
  border-radius: var(--radius-sm);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: var(--space-2) var(--space-1);
  cursor: pointer;
  font-family: inherit;
  border: none;
  text-align: center;
  color: var(--colour-text);
}
.disease-pillar-tile svg { width: 30px; height: 30px; }
.disease-pillar-tile .tile-label { display: flex; flex-direction: column; align-items: center; gap: 2px; }
.disease-pillar-tile .tile-label strong { font-weight: 800; font-size: 0.66rem; color: var(--colour-text); }
.disease-pillar-tile .tile-label em { font-style: normal; font-weight: 700; font-size: 0.58rem; color: var(--colour-text-muted); }
.disease-pillar-tile.t1 { background: var(--colour-soft-purple); }
.disease-pillar-tile.t1 svg { fill: var(--colour-accent); }
.disease-pillar-tile.t2 { background: var(--colour-soft-mint); }
.disease-pillar-tile.t2 svg { fill: #6fbfa0; }
.disease-pillar-tile.t3 { background: var(--colour-soft-coral); }
.disease-pillar-tile.t3 svg { fill: #e8836b; }
.disease-pillar-tile.t4 { background: var(--colour-soft-butter); }
.disease-pillar-tile.t4 svg { fill: #c99b2f; }

.videos-title { font-size: var(--font-size-xl); font-weight: 800; color: var(--colour-text); margin-bottom: var(--space-3); }
.videos-subtitle { font-size: var(--font-size-sm); color: var(--colour-text-muted); margin-bottom: var(--space-3); }
.filter-bar { margin: var(--space-4) 0 var(--space-2); }
.filter-chips { display: flex; gap: var(--space-2); overflow-x: auto; padding-bottom: 6px; -webkit-overflow-scrolling: touch; scrollbar-width: none; }
.filter-chips::-webkit-scrollbar { display: none; }
.filter-chip {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: #6fbfa0;
  border: 2px solid #6fbfa0;
  color: #ffffff;
  font-family: inherit;
  font-size: var(--font-size-sm);
  font-weight: 800;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-pill);
  cursor: pointer;
  white-space: nowrap;
}
.filter-chip .chip-icon { display: inline-flex; align-items: center; justify-content: center; font-size: var(--font-size-sm); font-weight: 900; line-height: 1; width: 14px; text-align: center; }
.filter-chip.excluded { background: #e2e2e6; border-color: #d0d0d6; color: #5a5a63; }
.filter-status { display: flex; align-items: center; justify-content: space-between; gap: var(--space-3); font-size: var(--font-size-sm); font-weight: 700; color: var(--colour-text-muted); margin-top: var(--space-1); min-height: 20px; }
.filter-count strong { color: #4a9d7c; font-weight: 800; }
.filter-clear { background: none; border: none; color: #6fbfa0; font-family: inherit; font-size: var(--font-size-sm); font-weight: 800; cursor: pointer; padding: 0; display: none; }
.filter-clear.visible { display: inline; }

.video-card { background: var(--colour-surface); border-radius: var(--radius); overflow: hidden; margin-bottom: var(--space-5); box-shadow: var(--shadow-sm); }
.video-card.hidden { display: none; }
.video-thumb { position: relative; width: 100%; aspect-ratio: 16/9; background: #1a1a2e; overflow: hidden; cursor: pointer; }
.video-thumb img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; display: block; }
.video-play { position: absolute; inset: 0; display: grid; place-items: center; background: rgba(0, 0, 0, 0.15); pointer-events: none; }
.video-play svg { width: 56px; height: 56px; fill: #ffffff; filter: drop-shadow(0 2px 12px rgba(0, 0, 0, 0.6)); }
.video-player-wrap { position: relative; width: 100%; aspect-ratio: 16/9; background: #000; }
.video-player-wrap > div { position: absolute; inset: 0; }
.video-player-wrap iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; display: block; }
.video-info { padding: var(--space-4) var(--space-4) var(--space-4); }
.video-title-text { font-weight: 800; font-size: var(--font-size-sm); color: var(--colour-text); line-height: 1.35; margin-bottom: var(--space-1); }
.video-channel-text { font-size: var(--font-size-sm); color: var(--colour-text-muted); font-weight: 600; margin-bottom: var(--space-3); }
.channel-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--colour-soft-purple);
  color: var(--colour-accent);
  text-decoration: none;
  font-size: var(--font-size-sm);
  font-weight: 800;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  font-family: inherit;
}
.channel-link svg { width: 14px; height: 14px; fill: currentColor; }
.no-results { background: var(--colour-surface); border-radius: var(--radius); padding: var(--space-6) var(--space-4); text-align: center; color: var(--colour-text-muted); font-size: var(--font-size-sm); display: none; }
.no-results.visible { display: block; }

#notifications-page {
  position: fixed;
  inset: 0;
  background: var(--colour-bg);
  z-index: 1860;
  display: flex;
  flex-direction: column;
  transform: translateY(100%);
  transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1);
  pointer-events: none;
}
#notifications-page.active { transform: translateY(0); pointer-events: auto; }
.notif-topbar { display: flex; align-items: center; gap: var(--space-4); padding: var(--space-4); background: var(--colour-soft-purple); }
.notif-title { font-weight: 800; font-size: var(--font-size-lg); flex: 1; }
.notif-close {
  background: var(--colour-nav-bg);
  border: none;
  width: 42px; height: 42px;
  border-radius: var(--radius-sm);
  font-size: var(--font-size-lg);
  font-weight: 800;
  cursor: pointer;
  display: grid;
  place-items: center;
  font-family: inherit;
  color: var(--colour-text);
  margin-left: auto;
}
.notif-body { flex: 1; overflow-y: auto; padding: var(--space-5) var(--space-4); }
.notif-list { display: flex; flex-direction: column; gap: var(--space-2); max-width: 620px; margin: 0 auto; }
.notif-item { background: var(--colour-surface); border-radius: var(--radius); padding: var(--space-4) var(--space-5); display: flex; gap: var(--space-4); }
.notif-item.unread { background: var(--colour-soft-purple); }
.notif-dot { width: 10px; height: 10px; border-radius: 50%; background: var(--colour-accent); flex-shrink: 0; margin-top: 6px; }
.notif-item:not(.unread) .notif-dot { background: transparent; }
.notif-content { flex: 1; min-width: 0; }
.notif-item-title { font-weight: 800; font-size: var(--font-size-sm); margin-bottom: var(--space-1); }
.notif-item-body { font-size: var(--font-size-sm); color: var(--colour-text-muted); line-height: 1.5; margin-bottom: 6px; }
.notif-item-time { font-size: 0.72rem; color: var(--colour-text-muted); font-weight: 600; }
.notif-empty { text-align: center; padding: 60px 20px; color: var(--colour-text-muted); font-size: var(--font-size-sm); }
.notif-filter-bar { display: flex; gap: 6px; padding: var(--space-2) var(--space-3); background: var(--colour-bg); border-top: 1px solid var(--colour-border); }
.notif-filter-tile {
  flex: 1;
  border: 2px solid transparent;
  border-radius: var(--radius-sm);
  padding: var(--space-3) var(--space-1);
  cursor: pointer;
  font-family: inherit;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  font-size: 0.6rem;
  font-weight: 800;
  color: var(--colour-text);
  text-align: center;
}
.notif-filter-tile.active { border-color: currentColor; }
.notif-filter-tile svg { width: 22px; height: 22px; fill: currentColor; }
.notif-filter-tile.f1 { background: var(--colour-soft-purple); color: var(--colour-accent); }
.notif-filter-tile.f2 { background: var(--colour-soft-mint);   color: #6fbfa0; }
.notif-filter-tile.f3 { background: var(--colour-soft-coral);  color: #e8836b; }
.notif-filter-tile.f4 { background: var(--colour-soft-butter); color: #c99b2f; }
.notif-filter-tile span { color: var(--colour-text); }

.modal {
  position: fixed;
  inset: 0;
  background: var(--colour-bg);
  color: var(--colour-text);
  z-index: 1880;
  display: flex;
  flex-direction: column;
  padding-bottom: 72px;
  transform: translateY(100%);
  transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1);
  pointer-events: none;
}
.modal.active { transform: translateY(0); pointer-events: auto; }
.modal-content { flex: 1; display: flex; flex-direction: column; overflow: hidden; width: 100%; background: var(--colour-bg); }
.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  background: var(--colour-soft-purple);
}
.modal-header h2 { font-size: var(--font-size-lg); font-weight: 800; flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.modal-close {
  background: var(--colour-nav-bg);
  border: none;
  width: 42px; height: 42px;
  border-radius: var(--radius-sm);
  font-size: var(--font-size-lg);
  font-weight: 800;
  cursor: pointer;
  display: grid;
  place-items: center;
  font-family: inherit;
  color: var(--colour-text);
}
.modal-body { flex: 1; overflow-y: auto; padding: var(--space-5) var(--space-4); }
.modal-body p { font-size: var(--font-size-sm); color: var(--colour-text-muted); line-height: 1.65; margin-bottom: var(--space-3); }
.modal-body h3 { font-size: 0.78rem; font-weight: 800; margin: var(--space-5) 0 var(--space-1); letter-spacing: 1.2px; text-transform: uppercase; color: var(--colour-text-muted); }
.modal-body strong { color: var(--colour-text); font-weight: 800; }
.modal-form { display: flex; flex-direction: column; gap: var(--space-3); }
.modal-form .btn { margin-top: var(--space-2); }

.settings-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-3); margin-top: var(--space-2); margin-bottom: var(--space-3); }
.settings-square {
  aspect-ratio: 1/1;
  background: var(--colour-surface);
  border: 2px solid transparent;
  border-radius: var(--radius);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  padding: var(--space-4);
  font-family: inherit;
  color: var(--colour-text);
}
.settings-square.active { border-color: var(--colour-accent); }
.settings-square .preview-text { font-weight: 800; color: var(--colour-text); }
.settings-square .settings-label { font-size: var(--font-size-sm); font-weight: 700; color: var(--colour-text-muted); text-align: center; }

.swatch { width: 60px; height: 60px; border-radius: var(--radius-md); display: grid; place-items: center; font-weight: 800; font-size: var(--font-size-lg); border: 2px solid rgba(0, 0, 0, 0.12); }
.swatch-default  { background: #c9b8e8; color: #2f2440; }
.swatch-ocean    { background: #7eb8e0; color: #ffffff; }
.swatch-electric { background: linear-gradient(135deg, #00d4ff, #0a0a0f 70%); color: #ffffff; border-color: #00d4ff; }
.swatch-bw       { background: #000000; color: #ffffff; border-color: #444; }
.swatch-wb       { background: #ffffff; color: #000000; border-color: #000; }
.swatch-grey     { background: #2b2b2b; color: #ffffff; border-color: #555; }

.layout-preview { width: 56px; height: 56px; display: flex; flex-direction: column; gap: 3px; padding: 6px; background: var(--colour-bg); border: 1px solid var(--colour-border); border-radius: var(--radius-sm); overflow: hidden; }
.layout-preview span { display: block; background: var(--colour-accent); border-radius: 1px; }
.layout-preview-classic span { flex: 1; }
.layout-preview-classic span:nth-child(2) { flex: 1.6; }
.layout-preview-spacious { gap: 4px; padding: 5px; }
.layout-preview-spacious span { flex: 1; background: #e8836b; }
.layout-preview-glass { background: linear-gradient(135deg, var(--colour-soft-purple), var(--colour-soft-mint)); }
.layout-preview-glass span { background: rgba(124, 91, 212, 0.55); border-radius: 2px; flex: 1; }

.settings-list { display: flex; flex-direction: column; gap: var(--space-2); margin-top: var(--space-2); }
.settings-btn {
  background: var(--colour-surface);
  border: none;
  border-radius: var(--radius-sm);
  padding: var(--space-4) var(--space-4);
  font-weight: 700;
  font-size: var(--font-size-sm);
  cursor: pointer;
  color: var(--colour-text);
  text-align: left;
  font-family: inherit;
}

#globalPPBtn {
  position: fixed;
  top: calc(14px + env(safe-area-inset-top, 0px));
  right: 14px;
  z-index: 3500;
  width: 52px; height: 52px;
  border-radius: 50%;
  background: rgba(124, 91, 212, 0.95);
  color: #ffffff;
  border: none;
  cursor: pointer;
  display: none;
  place-items: center;
  font-family: inherit;
  padding: 0;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.28);
  transition: transform 0.15s ease, background-color 0.15s ease;
}
#globalPPBtn.visible { display: grid; }
#globalPPBtn:hover { transform: scale(1.06); }
#globalPPBtn svg { width: 22px; height: 22px; fill: currentColor; display: block; }

svg { display: inline-block; vertical-align: middle; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}