/* ===== Free Offline Tools — Android-style shared theme ===== */
:root{
  --primary:#6750A4;
  --primary-dark:#4F378B;
  --on-primary:#ffffff;
  --primary-container:#EADDFF;
  --on-primary-container:#21005D;
  --secondary:#625B71;
  --surface:#FFFBFE;
  --surface-2:#F3EDF7;
  --surface-3:#ECE6F0;
  --on-surface:#1C1B1F;
  --on-surface-var:#49454F;
  --outline:#79747E;
  --error:#B3261E;
  --success:#2E7D32;
  --radius-lg:20px;
  --radius-md:14px;
  --radius-sm:10px;
  --shadow-1:0 1px 3px rgba(0,0,0,.15), 0 1px 2px rgba(0,0,0,.10);
  --shadow-2:0 4px 10px rgba(0,0,0,.15);
  --app-max:480px;
  --topbar-h:56px;
  --bottomnav-h:64px;
}
[data-theme="dark"]{
  --primary:#D0BCFF;
  --primary-dark:#B69DF8;
  --on-primary:#381E72;
  --primary-container:#4F378B;
  --on-primary-container:#EADDFF;
  --secondary:#CCC2DC;
  --surface:#141218;
  --surface-2:#1D1B20;
  --surface-3:#2B2930;
  --on-surface:#E6E1E5;
  --on-surface-var:#CAC4D0;
  --outline:#938F99;
}
*{box-sizing:border-box; -webkit-tap-highlight-color:transparent;}
html,body{margin:0;padding:0;}
body{
  font-family:"Roboto","Segoe UI",system-ui,-apple-system,sans-serif;
  background:#00000010;
  color:var(--on-surface);
  min-height:100vh;
  display:flex;
  justify-content:center;
}
[data-theme="dark"] body{background:#000;}

/* Phone-shaped app frame — makes the web app look like a native Android app on any screen */
.app{
  width:100%;
  max-width:var(--app-max);
  min-height:100vh;
  background:var(--surface);
  position:relative;
  box-shadow:var(--shadow-2);
  display:flex;
  flex-direction:column;
  overflow-x:hidden;
}

/* Top App Bar */
.topbar{
  height:var(--topbar-h);
  min-height:var(--topbar-h);
  display:flex;
  align-items:center;
  gap:8px;
  padding:0 4px;
  background:var(--surface);
  border-bottom:1px solid var(--surface-3);
  position:sticky;
  top:0;
  z-index:20;
}
.topbar .icon-btn{margin-left:4px;}
.topbar h1{
  font-size:20px;
  font-weight:500;
  margin:0;
  flex:1;
  overflow:hidden;
  text-overflow:ellipsis;
  white-space:nowrap;
}
.icon-btn{
  width:40px;height:40px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:transparent;border:none;cursor:pointer;
  color:var(--on-surface);font-size:20px;
  transition:background .15s;
  flex-shrink:0;
}
.icon-btn:active{background:var(--surface-3);}

/* Content area */
.content{
  flex:1;
  padding:16px 16px calc(var(--bottomnav-h) + 24px) 16px;
  overflow-y:auto;
}
.content.no-bottomnav{padding-bottom:24px;}

/* Search */
.search-bar{
  display:flex;align-items:center;gap:10px;
  background:var(--surface-3);
  border-radius:28px;
  padding:10px 16px;
  margin-bottom:18px;
}
.search-bar input{
  border:none;background:transparent;outline:none;
  font-size:15px;flex:1;color:var(--on-surface);
}
.search-bar .icon-btn{width:24px;height:24px;}

/* Section titles */
.section-title{
  font-size:14px;font-weight:700;letter-spacing:.5px;
  color:var(--on-surface-var);
  text-transform:uppercase;
  margin:20px 4px 10px;
}
.section-title:first-child{margin-top:4px;}

/* Category chips row */
.chip-row{display:flex;gap:8px;overflow-x:auto;padding:2px 2px 6px;scrollbar-width:none;}
.chip-row::-webkit-scrollbar{display:none;}
.chip{
  flex-shrink:0;
  padding:8px 16px;border-radius:20px;
  background:var(--surface-3);
  font-size:13px;font-weight:500;white-space:nowrap;
  border:1px solid transparent;cursor:pointer;color:var(--on-surface);
}
.chip.active{background:var(--primary-container);color:var(--on-primary-container);border-color:var(--primary);}

/* Tool grid */
.tool-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:10px;
}
.tool-card{
  background:var(--surface-2);
  border-radius:var(--radius-md);
  padding:14px 8px;
  display:flex;flex-direction:column;align-items:center;gap:8px;
  text-align:center;
  text-decoration:none;color:var(--on-surface);
  transition:transform .1s, box-shadow .1s;
  position:relative;
  cursor:pointer;
  border:none;
}
.tool-card:active{transform:scale(.96);}
.tool-card .emoji{font-size:26px;}
.tool-card span{font-size:11.5px;font-weight:500;line-height:1.25;}
.tool-card .fav{
  position:absolute;top:4px;right:4px;font-size:13px;opacity:.55;
}
.tool-card .fav.active{opacity:1;color:#F9A825;}

/* Category section wrapper */
.category-block{margin-bottom:8px;}
.category-head{
  display:flex;align-items:center;gap:8px;margin:22px 4px 10px;
}
.category-head .emoji{font-size:18px;}
.category-head h2{font-size:15px;font-weight:700;margin:0;color:var(--on-surface);}

/* Generic card / surface panel */
.card{
  background:var(--surface-2);
  border-radius:var(--radius-lg);
  padding:18px;
  box-shadow:var(--shadow-1);
  margin-bottom:16px;
}

/* Buttons */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border-radius:22px;border:none;
  font-size:14px;font-weight:600;letter-spacing:.2px;cursor:pointer;
  background:var(--primary);color:var(--on-primary);
  width:100%;
  transition:filter .15s, transform .1s;
}
.btn:active{transform:scale(.98);filter:brightness(.94);}
.btn.outline{background:transparent;color:var(--primary);border:1.5px solid var(--primary);}
.btn.tonal{background:var(--primary-container);color:var(--on-primary-container);}
.btn.small{height:36px;padding:0 16px;font-size:13px;width:auto;}
.btn-row{display:flex;gap:10px;flex-wrap:wrap;}
.btn-row .btn{flex:1;min-width:120px;}

/* Inputs */
label{font-size:12.5px;font-weight:600;color:var(--on-surface-var);display:block;margin:0 0 6px 2px;}
input[type=text],input[type=number],input[type=date],input[type=password],textarea,select{
  width:100%;
  background:var(--surface);
  border:1.5px solid var(--outline);
  border-radius:var(--radius-sm);
  padding:12px 14px;
  font-size:15px;
  color:var(--on-surface);
  outline:none;
  font-family:inherit;
}
input:focus,textarea:focus,select:focus{border-color:var(--primary);}
textarea{resize:vertical;min-height:120px;}
.field{margin-bottom:14px;}
.hint{font-size:11.5px;color:var(--on-surface-var);margin-top:4px;}

/* File drop zone */
.drop-zone{
  border:2px dashed var(--outline);
  border-radius:var(--radius-lg);
  padding:34px 16px;
  text-align:center;
  color:var(--on-surface-var);
  cursor:pointer;
  margin-bottom:16px;
}
.drop-zone.drag{border-color:var(--primary);background:var(--primary-container);}
.drop-zone .emoji{font-size:34px;display:block;margin-bottom:8px;}

/* Result / stat rows */
.stat-row{display:flex;justify-content:space-between;align-items:center;padding:10px 0;border-bottom:1px solid var(--surface-3);}
.stat-row:last-child{border-bottom:none;}
.stat-row .label{color:var(--on-surface-var);font-size:13.5px;}
.stat-row .value{font-weight:700;font-size:14.5px;}

.preview-img{max-width:100%;border-radius:var(--radius-md);display:block;margin:0 auto 12px;box-shadow:var(--shadow-1);}

/* Toast */
.toast{
  position:fixed;left:50%;bottom:calc(var(--bottomnav-h) + 16px);
  transform:translateX(-50%) translateY(20px);
  background:var(--on-surface);color:var(--surface);
  padding:12px 20px;border-radius:12px;font-size:13.5px;
  opacity:0;pointer-events:none;transition:.25s;z-index:100;
  max-width:90%;text-align:center;
}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0);}

/* Bottom nav */
.bottomnav{
  position:sticky; bottom:0;
  height:var(--bottomnav-h);
  display:flex;
  background:var(--surface);
  border-top:1px solid var(--surface-3);
  z-index:20;
}
.bottomnav button{
  flex:1;border:none;background:transparent;cursor:pointer;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;
  color:var(--on-surface-var);font-size:10.5px;font-weight:500;
}
.bottomnav button .emoji{font-size:19px;}
.bottomnav button.active{color:var(--primary);}

/* Toggle switch */
.switch-row{display:flex;align-items:center;justify-content:space-between;padding:12px 4px;}
.switch{position:relative;width:44px;height:24px;flex-shrink:0;}
.switch input{opacity:0;width:0;height:0;}
.switch .slider{position:absolute;inset:0;background:var(--outline);border-radius:24px;transition:.2s;cursor:pointer;}
.switch .slider:before{content:"";position:absolute;width:18px;height:18px;left:3px;top:3px;background:#fff;border-radius:50%;transition:.2s;}
.switch input:checked + .slider{background:var(--primary);}
.switch input:checked + .slider:before{transform:translateX(20px);}

/* Empty state */
.empty-state{text-align:center;padding:40px 10px;color:var(--on-surface-var);}
.empty-state .emoji{font-size:40px;display:block;margin-bottom:10px;}

/* Ripple */
.ripple{position:relative;overflow:hidden;}
.ripple-effect{position:absolute;border-radius:50%;background:rgba(255,255,255,.5);transform:scale(0);animation:ripple .5s linear;pointer-events:none;}
[data-theme="dark"] .ripple-effect{background:rgba(0,0,0,.35);}
@keyframes ripple{to{transform:scale(3);opacity:0;}}

::-webkit-scrollbar{width:6px;}
::-webkit-scrollbar-thumb{background:var(--surface-3);border-radius:4px;}

@media(min-width:481px){
  body{padding:24px 0;}
  .app{min-height:calc(100vh - 48px);border-radius:28px;overflow:hidden;}
}
@media(min-width:768px){
  .app.wide-app{max-width:920px;}
}

/* Tab Navigation */
.tabs{display:flex;gap:6px;background:var(--surface-3);border-radius:var(--radius-md);padding:4px;margin-bottom:16px;overflow-x:auto;}
.tab-btn{
  flex:1;min-width:max-content;padding:8px 14px;border:none;border-radius:10px;
  background:transparent;color:var(--on-surface-var);font-size:13px;font-weight:600;
  cursor:pointer;display:flex;align-items:center;justify-content:center;gap:6px;
  transition:all .15s ease;
}
.tab-btn.active{background:var(--surface);color:var(--primary);box-shadow:var(--shadow-1);}

/* Pill Selectors */
.pill-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(70px,1fr));gap:6px;margin:8px 0;}
.pill-btn{
  padding:8px 6px;border-radius:10px;border:1.5px solid var(--surface-3);background:var(--surface);
  color:var(--on-surface);font-size:12.5px;font-weight:600;cursor:pointer;text-align:center;
  transition:all .15s ease;
}
.pill-btn:hover{border-color:var(--primary-dark);}
.pill-btn.active{background:var(--primary-container);color:var(--on-primary-container);border-color:var(--primary);}

/* Before & After Interactive Comparison Slider */
.compare-box{position:relative;width:100%;max-width:640px;margin:0 auto 16px;border-radius:var(--radius-md);overflow:hidden;box-shadow:var(--shadow-2);background:#000;user-select:none;}
.compare-box img{display:block;width:100%;height:auto;max-height:480px;object-fit:contain;}
.compare-overlay{position:absolute;top:0;left:0;height:100%;overflow:hidden;width:50%;}
.compare-overlay img{width:100%;height:100%;max-height:480px;object-fit:contain;position:absolute;top:0;left:0;}
.compare-slider{
  position:absolute;top:0;bottom:0;width:3px;background:#fff;
  cursor:ew-resize;left:50%;transform:translateX(-50%);z-index:10;
  box-shadow:0 0 8px rgba(0,0,0,.6);
}
.compare-handle{
  position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);
  width:36px;height:36px;border-radius:50%;background:#fff;color:#222;
  display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:bold;
  box-shadow:0 2px 8px rgba(0,0,0,.5);pointer-events:none;
}
.compare-label{
  position:absolute;bottom:10px;padding:4px 10px;border-radius:8px;
  background:rgba(0,0,0,.65);color:#fff;font-size:11.5px;font-weight:700;letter-spacing:.4px;
  z-index:5;pointer-events:none;backdrop-filter:blur(4px);
}
.compare-label.left{left:10px;}
.compare-label.right{right:10px;}

/* Badges */
.badge{
  display:inline-flex;align-items:center;gap:4px;padding:3px 8px;border-radius:6px;
  font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.3px;
}
.badge-success{background:#E8F5E9;color:#2E7D32;}
[data-theme="dark"] .badge-success{background:#1B5E20;color:#A5D6A7;}
.badge-info{background:var(--primary-container);color:var(--on-primary-container);}
.badge-warning{background:#FFF3E0;color:#E65100;}
[data-theme="dark"] .badge-warning{background:#E65100;color:#FFE0B2;}

/* Govt Exam Cards */
.exam-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:12px;}
.exam-card{
  background:var(--surface);border:1.5px solid var(--surface-3);border-radius:var(--radius-md);
  padding:14px;cursor:pointer;transition:all .15s ease;display:flex;flex-direction:column;gap:8px;
}
.exam-card:hover{border-color:var(--primary);transform:translateY(-2px);box-shadow:var(--shadow-1);}
.exam-card.active{border-color:var(--primary);background:var(--primary-container);color:var(--on-primary-container);}
.exam-card .exam-title{font-weight:700;font-size:14px;display:flex;align-items:center;justify-content:space-between;}
.exam-card .exam-details{font-size:12px;color:var(--on-surface-var);line-height:1.5;}
.exam-card .exam-source{font-size:10.5px;color:var(--outline);margin-top:auto;}

/* Batch List */
.batch-list{display:flex;flex-direction:column;gap:10px;margin-top:14px;}
.batch-item{
  display:flex;align-items:center;gap:12px;padding:10px 14px;
  background:var(--surface);border:1px solid var(--surface-3);border-radius:var(--radius-md);
}
.batch-thumb{width:46px;height:46px;border-radius:8px;object-fit:cover;background:var(--surface-3);flex-shrink:0;}
.batch-info{flex:1;min-width:0;}
.batch-name{font-size:13px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.batch-meta{font-size:11.5px;color:var(--on-surface-var);display:flex;gap:8px;margin-top:2px;}
.batch-action{display:flex;gap:6px;align-items:center;}

/* Cropper Container */
.crop-area{position:relative;max-width:100%;background:#111;border-radius:var(--radius-md);overflow:hidden;margin:0 auto 12px;touch-action:none;}
.crop-canvas{display:block;max-width:100%;height:auto;margin:0 auto;}