/* ==========================================================================
   MAIN LAYOUT & STRUCTURE
   ========================================================================== */

/* Global Body */
body {
    font-family: 'Poppins', "Universal Sans", Arial, Helvetica, sans-serif;
    display: flex;
    flex-direction: column;
    align-items: center;
    height: 100vh; 
    height: 100dvh; 
    overflow: hidden; 
    margin: 0;
    padding: 10px;
    box-sizing: border-box;
    background-color: var(--default-page-bg-color);
    color: var(--text-color);
}
body.menu-background {
    height: auto !important;       
    min-height: 100vh;             
    overflow-y: auto !important;   
    overflow-x: hidden;            
    background-image: none;
    background-color: transparent; 
}
h1 { color: var(--text-color); }

/* --- PRACTICE MODE VISUALS --- */
body.practice-mode { background-color: var(--practice-bg, #e0f2f1) !important; }
html.dark-mode body.practice-mode { background-color: var(--practice-bg-dark, #10222B) !important; }
body.practice-mode::before {
    content: ""; position: fixed; top: 0; left: 0; right: 0; bottom: 0; z-index: 0; pointer-events: none; opacity: 0.05; background-repeat: repeat;
    background-image: var(--watermark);
}

/* --- MAIN WRAPPERS --- */
#homepage-main-content,
#levels-page-wrapper {
    height: auto !important;       
    overflow: visible !important;  
    flex: 1 0 auto;                
    width: 100%;
    max-width: 970px;
    display: flex;
    flex-direction: column;
    padding-bottom: 40px; 
    box-sizing: border-box;
    margin-left: auto;
    margin-right: auto;
}
#homepage-main-content { gap: 20px; }
#levels-page-wrapper { align-items: stretch; }

#practice-content-wrapper {
    flex: 1 1 auto; 
    overflow-y: auto; 
    min-height: 0; 
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
    max-width: 970px;
    margin-top: 10px;
    padding: 20px;
    background-color: var(--level-list-item-bg);
    border-radius: 12px;
    border: 1px solid rgba(120, 120, 120, 0.1);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    backdrop-filter: none;
    box-sizing: border-box;
    margin-left: auto;
    margin-right: auto;
    z-index: 1;
}

/* --- HEADERS --- */
.header-navigation-row {
    display: flex !important;
    justify-content: space-between !important;
    align-items: center !important;
    width: 100% !important;
    max-width: 970px !important; 
    padding: 0 !important;
    margin: 0 auto 10px auto !important;
    gap: 0 !important;
    height: 52px;
    box-sizing: border-box;
}

.page-header {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-grow: 1;
    height: 52px;
    box-sizing: border-box;
    padding: 0 10px;
    border-radius: 0 10px 10px 0;
    position: relative;
    z-index: 1;
}
/* Wrapper that pushes buttons apart */
.logo-center-wrapper {
    flex-grow: 1;  /* This forces the buttons to the edges */
    display: flex;
    justify-content: center;
    align-items: center;
    height: 52px !important; 
    margin: 0 !important; 
    background-color: var(--level-list-item-bg) !important; /* Restored background */
    box-shadow: 0 4px 6px rgba(0,0,0,0.15); /* Added shadow to match buttons */
    border: none !important;
    padding: 0;
    overflow: hidden;
}

.logo-link {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100%;
    width: 100%;
    text-decoration: none;
}

/* Image Sizing - Maximized */
.site-logo-img {
    height: 100%;        /* Fill the container height */
    width: auto;         /* Maintain aspect ratio */
    max-width: 100%;     /* Don't overflow width */
    object-fit: contain; /* Keep the image sharp */
    padding: 0;          /* REMOVED padding so it touches edges */
    display: block;      /* Removes tiny invisible inline gaps */
}

/* Theme Toggle Logic */
html.dark-mode .dark-mode-hidden { display: none !important; }
html:not(.dark-mode) .light-mode-hidden { display: none !important; }

/* Practice Header */
#practice-page-header {
    display: flex;
    width: 100%;
    max-width: 970px;
    margin-bottom: 20px;
}
.practice-header-row {
    max-width: 970px; 
    padding: 0; 
    min-height: 80px; 
    height: auto;     
    background-color: var(--level-list-item-bg);
    border-radius: 12px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
    overflow: visible; 
    position: relative;
    z-index: 5;
}
.practice-center-info {
    flex-grow: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px; 
    height: 100%;
    padding: 0 10px;
}
.title-column, .stats-column {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 2px; 
}
.title-column { align-items: flex-end; }
.stats-column { align-items: flex-start; }
.practice-app-name, #timer-display {
    font-size: 0.85em;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--link-color) !important;
    font-weight: 700;
    line-height: 1.1;
    margin: 0;
    border: none !important; 
    padding: 0 !important; 
    min-width: 0 !important;
    width: auto !important;
}
#practice-title-h1, #streak-counter-display {
    font-size: 1.3em; 
    line-height: 1.1;
    color: var(--text-color) !important;
    font-weight: 600;
    margin: 0;
    padding: 0;
    border: none !important; 
    min-width: 0 !important;
    width: auto !important;
}
.practice-app-name, #practice-title-h1 { text-align: right; white-space: normal; }
#timer-display, #streak-counter-display { text-align: left; white-space: nowrap; }

/* --- PROBLEM VISUALS (Restored) --- */
#practice-content-wrapper > #problem-visual-container,
#problem-visual-container {
    display: flex;
    justify-content: center; /* This forces the dots to the center */
    align-items: center;
    width: 100%;
    margin-top: 15px;
    margin-bottom: 15px;
    flex-wrap: wrap; /* Allows items to wrap on small screens */
}

/* Ensure SVGs don't get too huge on desktop */
#problem-visual-container svg {
    max-height: 180px; 
    height: auto;
    max-width: 100%;
}
/* Column Layout Styling */
#problem-text-display-area.column-layout {
    display: flex !important;
    flex-direction: column;
    align-items: flex-end !important;
    width: fit-content !important;
    min-width: min-content;
    margin: 0 auto 15px auto !important;
    padding: 0 !important;
    line-height: 1.2;
    font-family: monospace;
    font-size: 3.3em;
}
#problem-text-display-area.column-layout .problem-line { border-bottom: 3px solid var(--text-color); width: 100%; }
#problem-text-display-area.column-layout:not(.decimal-column):not(.multiplication-2x2) .problem-operand { padding: 0 5px; }
#problem-text-display-area.column-layout:not(.decimal-column):not(.multiplication-2x2) .problem-operator-operand2 { display: flex; align-items: center; width: 100%; justify-content: flex-end; }
#problem-text-display-area.column-layout:not(.decimal-column):not(.multiplication-2x2) .problem-operator { padding-right: 10px; min-width: 1.5ch; text-align: right; }
#problem-text-display-area.column-layout:not(.decimal-column):not(.multiplication-2x2) .problem-line { margin-top: 0px; }

#problem-text-display-area.decimal-column .number-display { display: flex; }
#problem-text-display-area.decimal-column .operator-number-row { display: flex; align-items: baseline; }
#problem-text-display-area.decimal-column .problem-operator { padding-right: 0.5ch; }
#problem-text-display-area.decimal-column .col-whole { text-align: right; }
#problem-text-display-area.decimal-column .col-decimal.no-decimal-placeholder { visibility: hidden; }
#problem-text-display-area.decimal-column .col-fractional { min-width: 2ch; text-align: left; }
#problem-text-display-area.decimal-column .problem-line { margin-top: 5px; }

#problem-text-display-area.multiplication-2x2 { line-height: 1.3; }
#problem-text-display-area.multiplication-2x2 .problem-operand-row { display: flex; justify-content: flex-end; width: 100%; }
#problem-text-display-area.multiplication-2x2 .problem-operator-small { padding-right: 0.5ch; align-self: center; }
#problem-text-display-area.multiplication-2x2 .problem-line.short-line { border-bottom: 2px solid var(--text-color); width: 100%; margin-top: 2px; margin-bottom: 2px; }

/* --- SECTIONS & CONTAINERS --- */
#levels-container {
    background-color: var(--level-list-item-bg);
    border-radius: 12px; 
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(120, 120, 120, 0.1);
    backdrop-filter: none;
    overflow: hidden; 
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 0; 
    max-width: 970px;
    margin-left: auto;
    margin-right: auto;
}
#level-list {
    list-style: none;
    padding: 0;
    margin: 0;
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.settings-container {
    width: 100% !important;
    max-width: 970px !important;
    margin-left: auto !important;
    margin-right: auto !important;
    margin-bottom: 10px !important;
    padding: 10px 10px !important; 
    box-sizing: border-box;
}
#levels-topic-title {
    margin: 0 0 1px 0 !important; 
    font-size: 1.4em;             
    line-height: 1;               
}

/* Topic Selection & Grids */
#topic-selection-container, #homepage-main-content .level-list-container { width: 100%; max-width: 970px; margin-left: auto; margin-right: auto;}
.topic-grid-card {
    background-color: var(--level-list-item-bg);
    backdrop-filter: none;
    border-radius: 12px;
    border: 1px solid rgba(120, 120, 120, 0.1);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    width: 100%;
    max-width: 970px;
    overflow: hidden;
}
.topic-section { padding: 20px 30px; }
.topic-section:not(:last-child) { border-bottom: 1px solid var(--button-border-color); }
.topic-grid-title { font-size: 1.5em; font-weight: 600; color: var(--text-color-headings); text-align: center; margin: 0; }
#topic-selection-container .topic-item-row, #topic-grid-container .topic-item-row {
    display: flex;
    text-decoration: none;
    color: inherit;
    border-bottom: 1px solid var(--button-border-color);
    transition: background-color 0.2s ease-out;
    padding: 5px 6px;     
    gap: 0px; 
    flex-direction: column; 
    align-items: stretch;   
}
#topic-selection-container .topic-item-row:hover, #topic-grid-container .topic-item-row:hover { background-color: var(--level-list-item-hover-bg); }
#topic-selection-container .topic-title-cell, #topic-grid-container .topic-title-cell {
    font-weight: 600;
    flex-shrink: 0;
    flex-basis: auto !important; 
    width: 100%;
    text-align: center;
    font-size: 1.1em;
    margin: 0; 
    padding: 0;
}
#topic-selection-container .topic-summary-container, #topic-grid-container .topic-summary-container {
    display: grid;
    grid-template-columns: repeat(9, 1fr); 
    width: 100%;
    gap: 3px; 
}

/* Ad Leaderboard */
.ad-leaderboard-container {
    width: 100% !important;
    max-width: 970px; 
    height: 90px;     
    display: flex !important;
    justify-content: center !important;
    align-items: center !important;
    margin-bottom: 10px !important;
    background-color: rgba(0, 0, 0, 0.2);
    border: 1px dashed rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    margin-left: auto !important;
    margin-right: auto !important;
}

/* =========================================
   ACCORDION & YEAR LEVELS (Compact & Bold)
   ========================================= */

/* --- The Container Groups (The "Card") --- */
.year-level-group {
    background-color: var(--card-bg);
    margin-bottom: 5px; /* Tighter gap between years */
    border-radius: 8px; /* Slightly tighter radius */
    border: 1px solid rgba(120, 120, 120, 0.1);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
    overflow: hidden;
}

/* --- The List Panel (Hidden area) --- */
.levels-list-panel {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease-in-out;
    background-color: rgba(0,0,0,0.05);
    padding: 0;
}

/* Fix: Remove default gaps from the list inside */
.levels-list-panel ul, 
.levels-list-panel .level-list {
    margin: 0 !important;
    padding: 0 !important;
}

/* --- The Headers (Clickable Bars) --- */
.year-level-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    user-select: none;
    height: 45px; /* Compact height */
    padding: 0 10px; /* Minimal side padding */
    background-color: var(--level-list-item-bg);
    transition: background-color 0.2s;
    border-bottom: 1px solid transparent;
}

/* Add a line separator only when open */
.year-level-group.active .year-level-header {
    border-bottom: 1px solid var(--button-border-color);
}

.year-level-header:hover {
    background-color: var(--level-list-item-hover-bg);
}

/* --- Force Left-Side Content (Emoji + Text) to be Horizontal --- */
.year-level-header > *:first-child,
.year-level-header .level-title {
    display: flex !important;
    flex-direction: row !important;
    align-items: center !important;
    gap: 12px;
}

.year-level-header h3 {
    margin: 0;
    font-size: 1.4em; /* Bigger Emoji & Text */
    color: var(--text-color-headings);
    font-weight: 700;
    line-height: 1;
}

/* --- The Arrow Icon Wrapper --- */
.year-level-toggle-icon-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px; /* Bigger touch target */
    height: 36px;
    border-radius: 50%;
    flex-shrink: 0;
    margin-left: 10px;
    background-color: transparent; /* Cleaner look without circle bg? Add color back if preferred */
    /* border: 1px solid var(--button-border-color); Optional border */
    transition: background-color 0.2s ease-out;
}

.year-level-header:hover .year-level-toggle-icon-wrapper {
    background-color: var(--button-hover-bg-color);
    border-radius: 50%;
}

.year-level-toggle-icon {
    font-size: 1.2em; /* Bigger Arrow */
    font-weight: bold;
    color: var(--text-color-secondary);
    transition: transform 0.3s ease-in-out;
    line-height: 1;
}

/* --- ROTATION FIX: 90deg makes a right-arrow point DOWN --- */
.year-level-group.active > .year-level-header .year-level-toggle-icon {
    transform: rotate(90deg); 
}

/* --- Review Page Checkbox Specifics --- */
.review-item-label {
    display: flex;
    align-items: center;
    width: 100%;
    cursor: pointer;
    font-size: 1.1em;
    gap: 10px;
    color: var(--text-color);
}

.review-topic-list {
    list-style: none;
    padding: 10px 0 10px 25px;
    margin: 0;
}
.review-topic-list li {
    margin-bottom: 8px;
}

/* --- Review Control Buttons --- */
#review-settings-container {
    padding: 10px 15px !important;
    display: flex;
    flex-direction: column;
    gap: 0px !important; 
}
.review-controls-row {
    margin: 0 !important;
    padding: 0 !important;
    display: flex;
    gap: 8px;
    justify-content: center;
    align-items: stretch; 
}
.count-btn {
    margin-top: 0 !important; 
    flex-grow: 1;
    height: 40px;
    padding: 0;
    font-size: 1em;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
    font-weight: 600;
    background-color: var(--button-bg-color);
    color: var(--button-text-color);
    border: 1px solid var(--button-border-color);
    cursor: pointer;
    transition: background-color 0.2s;
}
.count-btn:hover { filter: brightness(1.1); }
.count-btn.selected {
    background-color: var(--link-color) !important;
    color: white !important;
    border-color: var(--link-color);
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
}
#btn-start-review-action {
    margin-top: 0 !important; 
    flex-grow: 2;
    max-width: 180px;
    height: 40px;          
    padding: 0;
    font-size: 1em;
    font-weight: 800;
    border-radius: 6px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
}
#btn-start-review-action:not(:disabled) {
    background-color: #4ECDC4 !important;
    color: #111 !important;
    cursor: pointer;
    box-shadow: 0 4px 8px rgba(78, 205, 196, 0.3);
}
#btn-start-review-action:not(:disabled):hover {
    background-color: #66ded4 !important;
    transform: translateY(-2px);
}
#btn-start-review-action:disabled {
    background-color: #555;
    color: #888;
    cursor: not-allowed;
    box-shadow: none;
    border: 1px solid rgba(255,255,255,0.1);
}