/* =======================================================================================
   Design tokens
   ======================================================================================= */
:root{
  color-scheme: dark;
  --bg:#0b0f14; --panel:#121821; --muted:#1b2430;
  --text:#f0f4f8;           /* ≥ AA on --bg */
  --text-dim:#b8c5d4;       /* ≥ AA on --bg */
  --accent:#2bd4ff; --good:#23d18b; --warn:#ffcc66; --bad:#ff6b6b;

  --shadow:0 8px 24px rgba(0,0,0,.35);
  --radius:18px;

  --gap:14px; --gap-cal:6px;
  --tile-w: clamp(140px, 15vw, 220px);

  --header-height: 70px; /* Fixed header height - updated dynamically by JavaScript */
  --headerH: var(--header-height); /* Alias for backward compatibility */
  --footerH: 56px;
  --overviewHeaderH: 56px; /* Overview header height - updated dynamically */
  
  /* Category controls border */
  --category-controls-border: #1d2733;
  
  /* Scrollbar colors - theme-aware */
  --scrollbar-thumb: rgba(43,212,255,.3);
  --scrollbar-thumb-hover: rgba(43,212,255,.5);
  --scrollbar-track: transparent;
  --scrollbar-track-bg: #0d141c;
}

/* Theme: Default (current theme - dark with blue accents) */
:root[data-theme="default"],
:root:not([data-theme]){
  color-scheme: dark;
  --bg:#0b0f14; --panel:#121821; --muted:#1b2430;
  --text:#f0f4f8;
  --text-dim:#b8c5d4;
  --accent:#2bd4ff; --good:#23d18b; --warn:#ffcc66; --bad:#ff6b6b;
  --shadow:0 8px 24px rgba(0,0,0,.35);
  --category-controls-border: #1d2733;
  --border: #17202a;
  --border-muted: #1d2733;
  --border-strong: #223045;
  --hover-bg: #1a2532;
  --input-bg: #0d141c;
  --input-border: #1d2733;
  --button-secondary-bg: #152232;
  --button-secondary-border: #223045;
  --button-text: #0b0f14;
  --scrollbar-thumb: rgba(43,212,255,.3);
  --scrollbar-thumb-hover: rgba(43,212,255,.5);
  --scrollbar-track: transparent;
  --scrollbar-track-bg: #0d141c;
  --seg-bg: #1a2532;
  --seg-bd: #223045;
  --seg-tx: #b8c5d4;
  --seg-on: #2bd4ff;
  --seg-on-tx: #0b0f14;
}

/* Theme: True Dark Mode (pure dark, minimal colors) */
:root[data-theme="dark"]{
  color-scheme: dark;
  --bg:#000000; --panel:#0a0a0a; --muted:#1a1a1a;
  --text:#e0e0e0;
  --text-dim:#888888;
  --accent:#ffffff; --good:#4ade80; --warn:#fbbf24; --bad:#ef4444;
  --shadow:0 8px 24px rgba(0,0,0,.8);
  --category-controls-border: #2a2a2a;
  --border: #1a1a1a;
  --border-muted: #2a2a2a;
  --border-strong: #3a3a3a;
  --hover-bg: #1a1a1a;
  --input-bg: #0a0a0a;
  --input-border: #2a2a2a;
  --button-secondary-bg: #1a1a1a;
  --button-secondary-border: #3a3a3a;
  --button-text: #000000;
  --scrollbar-thumb: rgba(255,255,255,.3);
  --scrollbar-thumb-hover: rgba(255,255,255,.5);
  --scrollbar-track: transparent;
  --scrollbar-track-bg: #0a0a0a;
  --seg-bg: #1a1a1a;
  --seg-bd: #3a3a3a;
  --seg-tx: #888888;
  --seg-on: #ffffff;
  --seg-on-tx: #000000;
}

/* Theme: Light Mode */
:root[data-theme="light"]{
  color-scheme: light;
  --bg:#f8f9fa; --panel:#ffffff; --muted:#f5f5f5;
  --text:#1a1a1a;
  --text-dim:#666666;
  --accent:#0066cc; --good:#10b981; --warn:#f59e0b; --bad:#dc2626;
  --shadow:0 2px 8px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.04);
  --category-controls-border: #d0d0d0;
  --border: #e5e7eb;
  --border-muted: #d1d5db;
  --border-strong: #9ca3af;
  --hover-bg: #f3f4f6;
  --input-bg: #ffffff;
  --input-border: #d1d5db;
  --button-secondary-bg: #ffffff;
  --button-secondary-border: #9ca3af;
  --button-text: #1a1a1a;
  --scrollbar-thumb: rgba(0,102,204,.2);
  --scrollbar-thumb-hover: rgba(0,102,204,.4);
  --scrollbar-track: transparent;
  --scrollbar-track-bg: #f8f9fa;
  --seg-bg: #e5e7eb;
  --seg-bd: #9ca3af;
  --seg-tx: #666666;
  --seg-on: #0066cc;
  --seg-on-tx: #ffffff;
}

/* =======================================================================================
   Base
   ======================================================================================= */
html{ 
  background:var(--panel, #121821); 
  color-scheme: var(--color-scheme, dark); 
  padding-top: env(safe-area-inset-top, 0);
  transition:background-color 0.3s ease, color-scheme 0.3s ease;
}
html, body { overflow-x:hidden; }
body{
  margin:0;
  color:var(--text);
  font:16px system-ui,-apple-system,Segoe UI,Roboto,Inter,Arial;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  background: var(--bg);
  background-image: linear-gradient(180deg, var(--bg) 0%, var(--panel) 100%);
  min-height:100dvh;
  display:flex; flex-direction:column;
  overscroll-behavior-y:none; overscroll-behavior-x:none;
  touch-action:manipulation; /* Prevent double-tap zoom */
  -ms-touch-action:manipulation;
  color-scheme: var(--color-scheme, dark);
  transition:background-color 0.3s ease, color 0.3s ease;
}

/* Hide body content initially when loading screen is visible */
body:has(#app-loading-screen:not(.hidden)) > *:not(#app-loading-screen){
  opacity:0;
  transition:opacity 0.3s ease;
}

body:has(#app-loading-screen.hidden) > *:not(#app-loading-screen){
  opacity:1;
}
/* Extend header color behind top notch - CRITICAL FIX */
html::before{
  content:'';
  position:fixed;
  top:0;
  left:0;
  right:0;
  height:env(safe-area-inset-top, 0);
  background:var(--panel, #121821);
  z-index:10000;
  pointer-events:none;
}
/* Prevent pull-to-refresh and overscroll on PWA */
@media (display-mode: standalone) {
  body {
    overscroll-behavior-y:none;
    overscroll-behavior-x:none;
    -webkit-overflow-scrolling:touch;
  }
  main, #app {
    overscroll-behavior-y:contain;
    overscroll-behavior-x:none;
  }
}
@media(min-width:1024px){ body{ font-size:18px; } }
@media(min-width:1440px){ body{ font-size:19px; } }
img,svg,canvas,video{ max-width:100%; height:auto; display:block; }

/* =======================================================================================
   Loading Screen
   ======================================================================================= */
#app-loading-screen{
  position:fixed;
  top:0;
  left:0;
  right:0;
  bottom:0;
  background:linear-gradient(180deg, var(--bg) 0%, var(--panel) 100%);
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  z-index:99999;
  opacity:1;
  visibility:visible;
  transition:opacity 0.3s ease, visibility 0.3s ease;
  padding:env(safe-area-inset-top, 0) env(safe-area-inset-right, 0) env(safe-area-inset-bottom, 0) env(safe-area-inset-left, 0);
}

#app-loading-screen.hidden{
  opacity:0;
  visibility:hidden;
  pointer-events:none;
}

.loading-screen-content{
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:24px;
  text-align:center;
}

.loading-screen-icon{
  width:80px;
  height:80px;
  border-radius:20px;
  animation:loadingPulse 2s ease-in-out infinite;
}

@keyframes loadingPulse{
  0%, 100%{
    transform:scale(1);
    opacity:1;
  }
  50%{
    transform:scale(1.05);
    opacity:0.9;
  }
}

.loading-screen-text{
  font-size:18px;
  font-weight:600;
  color:var(--text-dim, #b8c5d4);
  display:flex;
  align-items:center;
  gap:8px;
}

.loading-dots{
  display:inline-flex;
  gap:4px;
  align-items:center;
}

.loading-dots span{
  width:6px;
  height:6px;
  border-radius:50%;
  background:var(--accent, #2bd4ff);
  animation:loadingDot 1.4s ease-in-out infinite;
}

.loading-dots span:nth-child(1){
  animation-delay:0s;
}

.loading-dots span:nth-child(2){
  animation-delay:0.2s;
}

.loading-dots span:nth-child(3){
  animation-delay:0.4s;
}

@keyframes loadingDot{
  0%, 60%, 100%{
    transform:scale(1);
    opacity:0.5;
  }
  30%{
    transform:scale(1.2);
    opacity:1;
  }
}

@media(max-width:768px){
  .loading-screen-icon{
    width:64px;
    height:64px;
  }
  .loading-screen-text{
    font-size:16px;
  }
}