:root {
  --font-display: "Space Grotesk", sans-serif;
  --font-body: "Sora", sans-serif;
  --bg-gradient: linear-gradient(135deg, #f8fafc, #dbeafe 45%, #fefce8);
  --panel-bg: rgba(255, 255, 255, 0.65);
  --panel-border: rgba(255, 255, 255, 0.8);
  --text-primary: #0f172a;
  --text-secondary: #334155;
  --accent: #0ea5e9;
  --accent-dark: #0284c7;
  --shadow: 0 20px 40px rgba(15, 23, 42, 0.08);
  --shadow-hover: 0 30px 60px rgba(15, 23, 42, 0.15);
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
}

body.theme-dark {
  --bg-gradient: linear-gradient(135deg, #0b1120, #1e293b 45%, #0f172a);
  --panel-bg: rgba(15, 23, 42, 0.75);
  --panel-border: rgba(148, 163, 184, 0.15);
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --accent: #38bdf8;
  --accent-dark: #0ea5e9;
  --shadow: 0 20px 40px rgba(2, 6, 23, 0.4);
  --shadow-hover: 0 30px 60px rgba(2, 6, 23, 0.6);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--font-body);
  background: var(--bg-gradient);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
  transition: background 0.4s ease, color 0.4s ease;
}

body.animations-disabled * {
  animation: none !important;
  transition: none !important;
}

.background-orbit {
  position: fixed;
  inset: -30% 0 0 -20%;
  background: radial-gradient(circle at top left, rgba(14, 165, 233, 0.35), transparent 55%),
    radial-gradient(circle at 70% 20%, rgba(59, 130, 246, 0.28), transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(249, 115, 22, 0.2), transparent 55%);
  filter: blur(40px);
  z-index: -1;
  animation: drift 20s ease-in-out infinite alternate;
}

@keyframes drift {
  0% { transform: translate3d(0, 0, 0) scale(1); }
  100% { transform: translate3d(-3%, 2%, 0) scale(1.05); }
}

/* Typography */
h1, h2, h3, h4, h5 {
  font-family: var(--font-display);
  margin-top: 0;
}

/* Layout */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 5vw;
  gap: 16px;
  backdrop-filter: blur(20px);
  background: rgba(255,255,255,0.1);
  border-bottom: 1px solid var(--panel-border);
  z-index: 100;
}
body.theme-dark .topbar { background: rgba(15,23,42,0.3); }

.sticky-nav {
  position: sticky;
  top: 0;
}

.logo {
  display: flex;
  gap: 16px;
  align-items: center;
  text-decoration: none;
  color: var(--text-primary);
}

.logo-mark {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--accent), #22d3ee);
  box-shadow: var(--shadow);
}

.logo h1 {
  margin: 0;
  font-size: 22px;
}

.logo p {
  margin: 2px 0 0;
  color: var(--text-secondary);
  font-size: 13px;
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.top-nav {
  display: flex;
  gap: 8px;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid var(--panel-border);
  background: var(--panel-bg);
  box-shadow: 0 4px 12px rgba(0,0,0,0.05);
}

.nav-link {
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 600;
  font-size: 14px;
  padding: 8px 16px;
  border-radius: 999px;
  transition: all 0.3s ease;
}

.nav-link:hover {
  background: rgba(14, 165, 233, 0.1);
}

.nav-link.active {
  background: var(--accent);
  color: white;
  box-shadow: 0 4px 12px rgba(14, 165, 233, 0.3);
}

.container {
  padding: 40px 5vw 80px;
  display: flex;
  flex-direction: column;
  gap: 32px;
  max-width: 1400px;
  margin: 0 auto;
}

/* Panels */
.panel {
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(24px);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.panel:hover {
  box-shadow: var(--shadow-hover);
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

.hero {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 32px;
  padding: 48px;
  background: linear-gradient(135deg, rgba(255,255,255,0.8), rgba(255,255,255,0.4));
  border: 1px solid #ffffff;
}
body.theme-dark .hero {
  background: linear-gradient(135deg, rgba(30,41,59,0.8), rgba(15,23,42,0.4));
  border: 1px solid rgba(255,255,255,0.1);
}

.hero h2 {
  font-size: 36px;
  margin-bottom: 16px;
  line-height: 1.2;
}

/* Buttons */
.primary-btn, .secondary-btn, .ghost-btn {
  border: none;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.primary-btn {
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: white;
  box-shadow: 0 10px 20px rgba(14, 165, 233, 0.25);
}

.primary-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 15px 25px rgba(14, 165, 233, 0.4);
}

.secondary-btn {
  background: rgba(14, 165, 233, 0.1);
  color: var(--accent-dark);
  border: 1px solid rgba(14, 165, 233, 0.2);
}
body.theme-dark .secondary-btn { color: var(--accent); }

.secondary-btn:hover {
  transform: translateY(-2px);
  background: rgba(14, 165, 233, 0.2);
}

.ghost-btn {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid transparent;
}
.ghost-btn:hover {
  background: rgba(14, 165, 233, 0.05);
}

.icon-btn {
  width: 44px;
  height: 44px;
  padding: 0;
  border-radius: 50%;
  border: 1px solid var(--panel-border);
}

/* Forms & Inputs */
textarea, select, input[type="number"], input[type="search"], input[type="file"] {
  width: 100%;
  padding: 14px 16px;
  border-radius: var(--radius-md);
  border: 1px solid var(--panel-border);
  background: rgba(255, 255, 255, 0.6);
  color: var(--text-primary);
  font-family: var(--font-body);
  transition: border-color 0.3s, box-shadow 0.3s;
}

body.theme-dark textarea, body.theme-dark select, body.theme-dark input {
  background: rgba(15, 23, 42, 0.6);
}

textarea:focus, input:focus, select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.2);
}

.upload-box {
  border: 2px dashed var(--panel-border);
  padding: 40px 20px;
  border-radius: var(--radius-lg);
  text-align: center;
  transition: all 0.3s ease;
  background: rgba(255, 255, 255, 0.3);
  cursor: pointer;
}
body.theme-dark .upload-box { background: rgba(15, 23, 42, 0.3); }

.upload-box:hover, .upload-box.drag-over {
  border-color: var(--accent);
  background: rgba(14, 165, 233, 0.05);
}

/* Grid & Stats */
.grid-two {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: 32px;
}
.split-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  gap: 32px;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
}

.stat-card {
  padding: 24px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, rgba(255,255,255,0.7), rgba(255,255,255,0.3));
  border: 1px solid var(--panel-border);
  display: flex;
  flex-direction: column;
  gap: 8px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.02);
  transition: transform 0.3s ease;
}
body.theme-dark .stat-card {
  background: linear-gradient(135deg, rgba(30,41,59,0.7), rgba(15,23,42,0.4));
}
.stat-card:hover {
  transform: translateY(-4px);
}

.stat-card span {
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.stat-card strong {
  font-size: 28px;
  font-family: var(--font-display);
  color: var(--accent-dark);
}
body.theme-dark .stat-card strong { color: var(--accent); }

/* Tables */
.table-container {
  overflow-x: auto;
}
table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin-top: 16px;
}
th, td {
  padding: 16px;
  text-align: left;
  border-bottom: 1px solid var(--panel-border);
}
th {
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  font-size: 12px;
  letter-spacing: 1px;
}
tr {
  transition: background 0.2s ease;
}
tr:hover td {
  background: rgba(14, 165, 233, 0.05);
}

/* Skeleton Loader */
.skeleton-container.loading * {
  visibility: hidden !important;
}
.skeleton-container.loading {
  position: relative;
  overflow: hidden;
}
.skeleton-container.loading::after {
  content: "";
  position: absolute;
  top: 0; right: 0; bottom: 0; left: 0;
  background: linear-gradient(90deg, rgba(255,255,255,0) 0%, rgba(255,255,255,0.4) 50%, rgba(255,255,255,0) 100%);
  background-color: rgba(0,0,0,0.05);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  z-index: 10;
}
body.theme-dark .skeleton-container.loading::after {
  background: linear-gradient(90deg, rgba(255,255,255,0) 0%, rgba(255,255,255,0.05) 50%, rgba(255,255,255,0) 100%);
  background-color: rgba(255,255,255,0.05);
  background-size: 200% 100%;
}
@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

/* Footer */
.footer {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-secondary);
  border-top: 1px solid var(--panel-border);
  margin: 40px auto 0;
  max-width: 800px;
}

/* Toast */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--text-primary);
  color: #ffffff;
  padding: 16px 24px;
  border-radius: var(--radius-md);
  font-weight: 600;
  box-shadow: 0 10px 25px rgba(0,0,0,0.2);
  transform: translateY(100px);
  opacity: 0;
  transition: all 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
  z-index: 1000;
}
body.theme-dark .toast {
  background: #f8fafc;
  color: #0f172a;
}
.toast.show {
  transform: translateY(0);
  opacity: 1;
}

/* Utilities */
.export-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.wordcloud-box {
  width: 100%;
  height: 260px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  border-radius: var(--radius-sm);
}

#wordcloudImg {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

.diff-insert { background-color: rgba(34, 197, 94, 0.2); text-decoration: underline; }
.diff-delete { background-color: rgba(239, 68, 68, 0.2); text-decoration: line-through; }
.diff-equal { color: inherit; }

@media (max-width: 960px) {
  .hero { flex-direction: column; align-items: flex-start; padding: 32px; }
  .grid-two { grid-template-columns: 1fr; }
  .split-grid { grid-template-columns: 1fr; }
  .top-nav { display: none; /* simple mobile nav hidden for brevity */ }
}

 / *   I n t e l l i g e n c e   L a y e r   C o m p o n e n t s   * / 
 . i n t e l l i g e n c e - g r i d   { 
     d i s p l a y :   g r i d ; 
     g r i d - t e m p l a t e - c o l u m n s :   r e p e a t ( a u t o - f i t ,   m i n m a x ( 4 0 0 p x ,   1 f r ) ) ; 
     g a p :   2 4 p x ; 
     m a r g i n - t o p :   2 4 p x ; 
 } 
 . h e a l t h - c a r d   { 
     p a d d i n g :   1 6 p x ; 
     b a c k g r o u n d :   v a r ( - - s u r f a c e ) ; 
     b o r d e r - r a d i u s :   v a r ( - - r a d i u s - m d ) ; 
     m a r g i n - b o t t o m :   1 2 p x ; 
     b o r d e r - l e f t :   4 p x   s o l i d   v a r ( - - a c c e n t ) ; 
 } 
 . h e a l t h - c a r d . h i g h   {   b o r d e r - l e f t - c o l o r :   # e f 4 4 4 4 ;   } 
 . h e a l t h - c a r d . m e d i u m   {   b o r d e r - l e f t - c o l o r :   # f 5 9 e 0 b ;   } 
 . h e a l t h - c a r d . l o w   {   b o r d e r - l e f t - c o l o r :   # 2 2 c 5 5 e ;   } 
 . h e a l t h - c a r d   s t r o n g   {   d i s p l a y :   b l o c k ;   m a r g i n - b o t t o m :   4 p x ;   } 
 . h e a l t h - c a r d   p   {   f o n t - s i z e :   1 4 p x ;   c o l o r :   v a r ( - - t e x t - s e c o n d a r y ) ;   m a r g i n :   0 ;   } 
 
 . r a d a r - c o n t a i n e r   { 
     p o s i t i o n :   r e l a t i v e ; 
     h e i g h t :   3 5 0 p x ; 
     w i d t h :   1 0 0 % ; 
 } 
 . g r o w t h - c u r v e - c o n t a i n e r   { 
     p o s i t i o n :   r e l a t i v e ; 
     h e i g h t :   3 0 0 p x ; 
     w i d t h :   1 0 0 % ; 
 } 
 
 . n e t w o r k - c o n t a i n e r   { 
     h e i g h t :   4 0 0 p x ; 
     w i d t h :   1 0 0 % ; 
     b a c k g r o u n d :   v a r ( - - s u r f a c e ) ; 
     b o r d e r - r a d i u s :   v a r ( - - r a d i u s - m d ) ; 
     o v e r f l o w :   h i d d e n ; 
     p o s i t i o n :   r e l a t i v e ; 
 } 
 . n e t w o r k - c o n t a i n e r   s v g   { 
     w i d t h :   1 0 0 % ; 
     h e i g h t :   1 0 0 % ; 
 } 
 . n e t w o r k - t o o l t i p   { 
     p o s i t i o n :   a b s o l u t e ; 
     p a d d i n g :   8 p x   1 2 p x ; 
     b a c k g r o u n d :   r g b a ( 1 5 ,   2 3 ,   4 2 ,   0 . 9 ) ; 
     c o l o r :   w h i t e ; 
     b o r d e r - r a d i u s :   4 p x ; 
     p o i n t e r - e v e n t s :   n o n e ; 
     f o n t - s i z e :   1 2 p x ; 
     o p a c i t y :   0 ; 
     t r a n s i t i o n :   o p a c i t y   0 . 2 s ; 
 } 
 
 . h e a t m a p - t e x t   { 
     f o n t - s i z e :   1 6 p x ; 
     l i n e - h e i g h t :   1 . 8 ; 
     c o l o r :   v a r ( - - t e x t - p r i m a r y ) ; 
 } 
 . h e a t m a p - s e n t e n c e   { 
     p a d d i n g :   2 p x   4 p x ; 
     b o r d e r - r a d i u s :   4 p x ; 
     t r a n s i t i o n :   b a c k g r o u n d   0 . 3 s ; 
 } 
 . h e a t m a p - s e n t e n c e : h o v e r   { 
     f i l t e r :   b r i g h t n e s s ( 0 . 9 ) ; 
     c u r s o r :   h e l p ; 
 } 
 
 . r e p l a y - c o n t r o l s   { 
     p o s i t i o n :   s t i c k y ; 
     b o t t o m :   2 0 p x ; 
     l e f t :   5 0 % ; 
     t r a n s f o r m :   t r a n s l a t e X ( - 5 0 % ) ; 
     w i d t h :   f i t - c o n t e n t ; 
     b a c k g r o u n d :   v a r ( - - s u r f a c e - r a i s e d ) ; 
     p a d d i n g :   1 2 p x   2 4 p x ; 
     b o r d e r - r a d i u s :   5 0 p x ; 
     b o r d e r :   1 p x   s o l i d   v a r ( - - b o r d e r ) ; 
     d i s p l a y :   f l e x ; 
     a l i g n - i t e m s :   c e n t e r ; 
     g a p :   1 6 p x ; 
     b o x - s h a d o w :   0   1 0 p x   2 5 p x   r g b a ( 0 , 0 , 0 , 0 . 2 ) ; 
     z - i n d e x :   1 0 0 ; 
     b a c k d r o p - f i l t e r :   b l u r ( 1 0 p x ) ; 
 } 
 . r e p l a y - c o n t r o l s   i n p u t [ t y p e = " r a n g e " ]   { 
     w i d t h :   2 0 0 p x ; 
 } 
 . f i n g e r p r i n t - g a u g e s   { 
     d i s p l a y :   g r i d ; 
     g r i d - t e m p l a t e - c o l u m n s :   r e p e a t ( 2 ,   1 f r ) ; 
     g a p :   1 6 p x ; 
 } 
 . g a u g e   { 
     b a c k g r o u n d :   r g b a ( 0 , 0 , 0 , 0 . 0 5 ) ; 
     b o r d e r - r a d i u s :   v a r ( - - r a d i u s - s m ) ; 
     p a d d i n g :   1 2 p x ; 
     t e x t - a l i g n :   c e n t e r ; 
 } 
 . t h e m e - d a r k   . g a u g e   {   b a c k g r o u n d :   r g b a ( 2 5 5 , 2 5 5 , 2 5 5 , 0 . 0 2 ) ;   } 
 . g a u g e - v a l u e   { 
     f o n t - s i z e :   2 4 p x ; 
     f o n t - w e i g h t :   7 0 0 ; 
     c o l o r :   v a r ( - - a c c e n t ) ; 
     m a r g i n - t o p :   8 p x ; 
 } 
  
 