:root {
    --bg-color: var(--tg-theme-bg-color, #ffffff);
    --text-color: var(--tg-theme-text-color, #222222);
    --hint-color: var(--tg-theme-hint-color, #7f8c8d);
    --link-color: var(--tg-theme-link-color, #2980b9);
    --button-color: var(--tg-theme-button-color, #2980b9);
    --button-text-color: var(--tg-theme-button-text-color, #ffffff);
    --secondary-bg-color: var(--tg-theme-secondary-bg-color, #f4f6f7);
    --border-color: rgba(0, 0, 0, 0.08);
}

@media (prefers-color-scheme: dark) {
    :root {
        --border-color: rgba(255, 255, 255, 0.1);
    }
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--secondary-bg-color);
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
}

#app {
    max-width: 500px;
    margin: 0 auto;
    background-color: var(--bg-color);
    min-height: 100vh;
    box-shadow: 0 0 15px rgba(0,0,0,0.05);
    position: relative;
    overflow-x: hidden;
}

header {
    background-color: var(--bg-color);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

header h2 {
    text-align: center;
    padding: 15px 0 10px;
    font-size: 18px;
    font-weight: 600;
    letter-spacing: 0.5px;
}
header h2 i { margin-right: 6px; color: var(--button-color); }

.tabs {
    display: flex;
    border-top: 1px solid var(--border-color);
}

.tab-btn {
    flex: 1;
    background: transparent;
    border: none;
    padding: 12px 0;
    font-size: 14px;
    font-weight: 600;
    color: var(--hint-color);
    cursor: pointer;
    transition: all 0.3s ease;
    border-bottom: 3px solid transparent;
}

.tab-btn i { margin-right: 5px; }
.tab-btn.active {
    color: var(--button-color);
    border-bottom-color: var(--button-color);
}

.view { display: none; padding: 15px; }
.view.active { display: block; }

/* Profile UI */
.profile-header {
    background-color: var(--bg-color);
    border-radius: 8px;
    padding: 25px 20px;
    text-align: center;
    box-shadow: 0 2px 4px rgba(0,0,0,0.02);
    border: 1px solid var(--border-color);
    margin-bottom: 15px;
}

.profile-header h1 {
    font-size: 22px;
    margin-bottom: 5px;
}

.badge-rank {
    display: inline-block;
    background-color: var(--button-color);
    color: var(--button-text-color);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
    margin-top: 8px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.stat-card {
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 15px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 4px rgba(0,0,0,0.02);
}

.stat-card i {
    font-size: 20px;
    color: var(--button-color);
    margin-bottom: 8px;
}

.stat-title {
    font-size: 12px;
    color: var(--hint-color);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stat-value {
    font-size: 18px;
    font-weight: 700;
    margin-top: 4px;
}

/* Leaderboard UI */
.lb-header {
    display: flex;
    justify-content: space-between;
    padding: 0 10px 10px;
    font-size: 13px;
    font-weight: 600;
    color: var(--hint-color);
    text-transform: uppercase;
}

.lb-card {
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 12px 15px;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    box-shadow: 0 1px 3px rgba(0,0,0,0.02);
}

.lb-rank {
    width: 35px;
    font-size: 16px;
    font-weight: 700;
    color: var(--hint-color);
}

.lb-rank.top-1 { color: #f1c40f; font-size: 20px; }
.lb-rank.top-2 { color: #95a5a6; font-size: 18px; }
.lb-rank.top-3 { color: #cd7f32; font-size: 18px; }

.lb-info { flex-grow: 1; overflow: hidden; padding-right: 10px; }
.lb-name {
    font-weight: 600;
    font-size: 15px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.lb-meta {
    font-size: 12px;
    color: var(--hint-color);
    margin-top: 3px;
}

.lb-stats {
    text-align: right;
}

.lb-xp { font-weight: 700; font-size: 14px; }
.lb-tier { font-size: 11px; color: var(--button-color); font-weight: 600; }

.loading { text-align: center; color: var(--hint-color); padding: 40px 20px; font-size: 14px;}

 / *   C o n t r o l s   * / 
 . c o n t r o l s - c o n t a i n e r   {   d i s p l a y :   f l e x ;   g a p :   1 0 p x ;   m a r g i n - b o t t o m :   1 5 p x ;   } 
 # s e a r c h - i n p u t   {   f l e x - g r o w :   1 ;   p a d d i n g :   1 0 p x   1 5 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 - c o l o r ) ;   b o r d e r - r a d i u s :   8 p x ;   b a c k g r o u n d - c o l o r :   v a r ( - - b g - c o l o r ) ;   c o l o r :   v a r ( - - t e x t - c o l o r ) ;   f o n t - f a m i l y :   i n h e r i t ;   o u t l i n e :   n o n e ;   } 
 # s o r t - s e l e c t   {   p a d d i n g :   1 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 - c o l o r ) ;   b o r d e r - r a d i u s :   8 p x ;   b a c k g r o u n d - c o l o r :   v a r ( - - b g - c o l o r ) ;   c o l o r :   v a r ( - - t e x t - c o l o r ) ;   f o n t - f a m i l y :   i n h e r i t ;   o u t l i n e :   n o n e ;   } 
 / *   P a g i n a t i o n   * / 
 . p a g i n a t i o n   {   d i s p l a y :   f l e x ;   j u s t i f y - c o n t e n t :   s p a c e - b e t w e e n ;   a l i g n - i t e m s :   c e n t e r ;   m a r g i n - t o p :   1 5 p x ;   p a d d i n g :   1 0 p x   0 ;   } 
 . p a g i n a t i o n   b u t t o n   {   b a c k g r o u n d - c o l o r :   v a r ( - - b u t t o n - c o l o r ) ;   c o l o r :   v a r ( - - b u t t o n - t e x t - c o l o r ) ;   b o r d e r :   n o n e ;   p a d d i n g :   8 p x   1 5 p x ;   b o r d e r - r a d i u s :   6 p x ;   c u r s o r :   p o i n t e r ;   f o n t - w e i g h t :   b o l d ;   } 
 . p a g i n a t i o n   b u t t o n : d i s a b l e d   {   o p a c i t y :   0 . 5 ;   c u r s o r :   n o t - a l l o w e d ;   } 
 # p a g e - i n f o   {   f o n t - s i z e :   1 4 p x ;   f o n t - w e i g h t :   6 0 0 ;   c o l o r :   v a r ( - - h i n t - c o l o r ) ;   } 
  
 