/* --- Global Styles & Glassmorphism Variables --- */
:root {
    --primary-color: #1c3d7d; /* Lighter blue for better contrast on dark bg */
    --secondary-color: #fbd7c0; /* Bright yellow/orange accent */
    --accent-teal: #2dd4bf; 
    --text-color: #e0e0e0;
    --text-color-dark: #333;
    --text-color-jp: #acc7fc;
    --button-hover: #2e5099;
    --background-image: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
    --background-color: linear-gradient(120deg, #2d3a4def 0%, #1f2838 100%);
    --glass-bg: rgba(30, 40, 60, 0.45);
    --glass-border: rgba(255, 255, 255, 0.15);
    --glass-shadow: rgba(0, 0, 0, 0.2);
    --success-bg: rgba(40, 167, 69, 0.3);
    --danger-bg: rgba(220, 53, 69, 0.3);
    --nav-height: 65px;
    --border-radius: 8px;
    --text-color-white: #ffffff;
    --nav-active-color: #6891e2; 
    --text-color-ash: #aaa;
    --text-color-ash-dark: #888;
    --danger-color: #ff8a80;
    --danger-button: #c74034;
    --text-color-light: #ccc;
    --quiz-progress-color:#E3FFE7;
    --quiz-progress-bg: #555;
    --particle-button:#1c3d7d;
    --missing-color: #ffcdd2;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: 'Roboto', 'Noto Sans JP', sans-serif;
    background-image: var(--background-image);
    background-attachment: fixed;
    color: var(--text-color);
    padding-top: var(--nav-height);
}

a { text-decoration: none; color: var(--primary-color); font-weight: 700; }
a:hover { color: var(--accent-teal); }

h1, h2, h3 { color: var(--text-color-white); text-shadow: 0 1px 3px var(--glass-shadow); }

.container { max-width: 1100px; margin: 20px auto; padding: 20px; }

/* --- Header & Navigation (Glass) --- */
header {
    background: rgba(30, 40, 60, 0.6);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border-bottom: 1px solid var(--glass-border);
    position: fixed;
    top: 0; left: 0; width: 100%;
    z-index: 1000;
}

nav {
    display: flex; justify-content: space-between; align-items: center;
    padding: 0 25px; height: var(--nav-height);
    max-width: 1200px; margin: 0 auto;
}
nav .logo a { font-size: 1.6em; color: var(--text-color-white); }
nav .nav-links { list-style: none; display: flex; gap: 15px; }
nav .nav-links li a {
    color: var(--text-color); padding: 8px 16px; border-radius: var(--border-radius);
    transition: background-color 0.3s, color 0.3s;
}
nav .nav-links li a:hover, nav .nav-links li a.active { background-color: var(--primary-color); color: white; }

.dropdown-menu {
    display: none; position: absolute;
    background: var(--background-color);
    backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
    box-shadow: 0 4px 12px var(--glass-shadow);
    border-radius: var(--border-radius);
    border: 1px solid var(--glass-border);
    min-width: 250px; max-height: 400px;
    overflow-y: auto; z-index: 1001;
}
.dropdown-container.open .dropdown-menu { display: block; }
.dropdown-menu a { padding: 12px 20px; display: block; }

/* --- Main Content & Hero --- */
main { padding: 20px; }
.hero { text-align: center; padding: 20px 20px; margin-bottom: 10px; }
.hero h1 { font-size: 2.8em;}
.hero h2 { font-size: 1.2em; font-weight: 400; margin-top: 10px; }

.section-box {
    background: var(--glass-bg);
    backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
    padding: 25px; border-radius: var(--border-radius);
    margin-bottom: 20px; border: 1px solid var(--glass-border);
    box-shadow: 0 4px 20px var(--glass-shadow);
}

/* --- Tabs Styling --- */
.nav-tabs {
    display: flex;
    gap: 5px;
    border-bottom: 1px solid var(--glass-border);
    margin-bottom: 25px;
}
.nav-tab {
    padding: 12px 22px;
    border: none;
    background-color: transparent;
    cursor: pointer;
    font-size: 16px;
    color: var(--text-color);
    border-bottom: 3px solid transparent;
    transition: color 0.3s, border-color 0.3s;
}
.nav-tab:hover { color: var(--text-color-white); }
.nav-tab.active {
    color: var(--nav-active-color);
    border-bottom-color: var(--primary-color);
    font-weight: 700;
}
.tab-content { display: none; }
.tab-content.active { display: block; }


/* --- Redesigned Random Word Section --- */
.random-word-container {
    display: flex; flex-direction: column; align-items: center; gap: 20px;
}
.flashcard-container {
    width: 100%;
    min-height: 160px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.flashcard-content {
    width: 100%;
    max-width: 600px;
    padding: 20px;
    background: rgba(0,0,0,0.2);
    border-radius: var(--border-radius);
    text-align: center;
    /* Removed animation properties here */
}
.word-display, .meaning-display {
    font-size: 2em; font-weight: 700;
    color: var(--text-color-white); word-wrap: break-word;
}
.meaning-display .speak-icon {
    font-size: 0.6em; margin-left: 15px;
    cursor: pointer; vertical-align: middle;
}

/* --- General Components (Buttons, Inputs) --- */
.add-button, .control-button {
    margin-right:auto;margin-left: 12px ;padding: 12px 20px; background-color: var(--primary-color);
    color: white; border: none; border-radius: var(--border-radius);
    cursor: pointer; font-size: 16px; font-weight: 700;
    transition: background-color 0.3s, transform 0.2s;
}
.add-button:hover, .control-button:hover { background-color: var(--button-hover); transform: translateY(-2px); }

input, select {
    width: 100%; padding: 12px 15px;
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius);
    font-size: 16px;
    background-color: rgba(0,0,0,0.2);
    color: var(--text-color);
}
input::placeholder { color: var(--text-color-ash); }
.input-container {
    display: grid; grid-template-columns: 1fr 1fr 1fr auto;
    gap: 15px; align-items: center;
}
.input-container button { align-self: end; }

/* --- Word Cards (Glass) --- */
.word-list-container, .weak-words-list {
    display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}
/* --- NEW: Skeleton Loader Styles --- */
.skeleton-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius);
    padding: 15px;
    display: flex;
    flex-direction: column;
    gap: 12px; /* Space between skeleton elements */
}
/* --- NEW: Skeleton for Sentence Modal --- */
.skeleton-sentence {
    margin-bottom: 25px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--glass-border);
}
.skeleton-sentence .skeleton-line.title {
    height: 18px; /* Slightly smaller for sentence lines */
    margin-bottom: 10px;
}
.skeleton-sentence .skeleton-line.text {
    height: 16px;
    width: 70%; /* Sub-lines are often shorter */
}

.skeleton-line {
    background-color: rgba(130, 140, 160, 0.2);
    border-radius: 4px;
    animation: pulse 1.5s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

.skeleton-line.title {
    width: 60%;
    height: 20px;
}

.skeleton-line.text {
    width: 80%;
    height: 24px;
}
/* --- NEW: Skeleton for Study Session Page --- */
.skeleton-study-grid {
    display: grid;
    grid-template-columns: 3fr 2fr;
    gap: 25px;
    align-items: flex-start;
}

.skeleton-flashcard-box,
.skeleton-word-list-box {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius);
    padding: 25px;
}

.skeleton-flashcard-content {
    height: 160px;
    width: 100%;
    margin: 20px 0;
    background-color: rgba(0, 0, 0, 0.2);
    border-radius: var(--border-radius);
    animation: pulse 1.5s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

.skeleton-line.button {
    height: 45px;
    width: 160px;
    margin: 0 auto;
}

.skeleton-list-item {
    height: 50px;
    width: 100%;
    margin-bottom: 10px;
    background-color: rgba(0, 0, 0, 0.2);
    border-radius: var(--border-radius);
    animation: pulse 1.5s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

/* Responsive adjustment for study skeleton */
@media (max-width: 768px) {
    .skeleton-study-grid {
        grid-template-columns: 1fr;
    }
}
/* Animation for the pulsing effect */
@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

.word-card {
    background: var(--glass-bg);
    backdrop-filter: blur(5px); -webkit-backdrop-filter: blur(5px);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius); padding: 15px; position: relative;
    transition: transform 0.2s, box-shadow 0.2s;
}
.word-card:hover { transform: translateY(-4px); box-shadow: 0 8px 25px var(--glass-shadow); }
.word-card-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 10px; }
.word-card-bangla { font-size: 1.2em; font-weight: 700; color: var(--text-color-white); }
.word-card-tags { display: flex; gap: 5px; }
.word-card-category { font-size: 0.8em; padding: 3px 8px; border-radius: 12px; background-color: rgba(0,0,0,0.3); color: var(--text-color); }
.lesson-tag { background-color: var(--secondary-color) !important; color: var(--text-color-dark) !important; font-weight: 700; }
.word-card-japanese { font-size: 1.4em; color: var(--text-color-jp); font-family: 'Noto Sans JP', sans-serif; display: flex; justify-content: space-between; align-items: center; }
.speak-icon { cursor: pointer; font-size: 0.9em; }

.card-actions { position: absolute; top: 10px; right: 10px; display: flex; gap: 8px; opacity: 0; transition: opacity 0.3s; }
.word-card:hover .card-actions { opacity: 1; }
.card-action-btn { background: rgba(255,255,255,0.1); border: none; width: 28px; height: 28px; border-radius: 50%; cursor: pointer; color: white; font-size: 14px; }
.card-action-btn:hover { background: rgba(255,255,255,0.2); }

/* --- QUIZ STYLES --- */
.quiz-container { text-align: center; }
.quiz-bangla-word { font-size: 1.6em; margin: 25px 0; font-weight: 500; }
.quiz-option {
    padding: 15px;
    margin: 10px auto;
    background: rgba(0,0,0,0.2);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius);
    cursor: pointer;
    max-width: 500px;
    transition: all 0.2s;
}
.quiz-option:hover {
    border-color: var(--primary-color);
    background: rgba(130, 170, 255, 0.3);
    transform: scale(1.02);
}
.quiz-option.correct {
    background: var(--success-bg) !important;
    border-color: rgba(40, 167, 69, 0.8);
    color: var(--text-color-white);
    font-weight: 700;
}
.quiz-option.wrong {
    background: var(--danger-bg) !important;
    border-color: rgba(220, 53, 69, 0.8);
    color: var(--text-color-white);
}


/* --- MODAL STYLES --- */
.modal-overlay {
    position: fixed; top: 0; left: 0;
    width: 100%; height: 100%;
    background: rgba(0,0,0,0.6);
    display: flex; align-items: center; justify-content: center;
    z-index: 2000;
}
.modal-content {
    background: var(--glass-bg);
    backdrop-filter: blur(15px); -webkit-backdrop-filter: blur(15px);
    border: 1px solid var(--glass-border);
    padding: 30px; border-radius: var(--border-radius);
    width: 90%; max-width: 500px; position: relative;
    color: var(--text-color);
}
.modal-close { position: absolute; top: 10px; right: 15px; background: none; border: none; font-size: 24px; cursor: pointer; color: white; }
.input-group {
    margin-bottom: 15px;
    margin-right: 8px;
}
.input-group label { display: block; margin-bottom: 5px; font-weight: 700; color: white; }


/* --- FOOTER & SCROLL-TO-TOP --- */
footer {
    text-align: center;
    padding: 25px;
    background: rgba(0,0,0,0.2);
    color: var(--text-color-ash);
    margin-top: 40px;
    border-top: 1px solid var(--glass-border);
}

.scroll-to-top {
    position: fixed; bottom: 20px; right: 20px;
    width: 45px; height: 45px;
    background-color: var(--primary-color);
    color: white; border-radius: 50%; border: none;
    font-size: 24px; cursor: pointer; display: none;
    align-items: center; justify-content: center;
    box-shadow: 0 2px 10px var(--glass-shadow);
    transition: all 0.3s;
}
.scroll-to-top:hover { background-color: var(--button-hover); }
.scroll-to-top.visible { display: flex; }


/* --- RESPONSIVE ADJUSTMENTS --- */
@media (max-width: 768px) {
    .input-container { grid-template-columns: 1fr; }
    nav { flex-direction: row; height: auto; padding: 10px 20px; }
    body { padding-top: 10px; }
    body::-webkit-scrollbar {
    display: none;
}
}

nav {
    position: relative; /* For mobile menu positioning */
}

.logo a {
    display: flex;
    align-items: center;
    gap: 15px; /* Space between title and lesson tag */
}

.header-lesson-tag {
    font-size: 0.6em;
    font-weight: 700;
    padding: 5px 12px;
    background-color: var(--primary-color);
    color: var(--text-color);
    border-radius: 20px;
    text-shadow: none;
}

.nav-menu-button {
    display: none; /* Hidden on desktop */
    font-size: 28px;
    cursor: pointer;
}

/* --- Responsive Header --- */

/* --- Sentence Modal Styling (UPDATED) --- */
#sentence-modal .modal-content {
    max-width: 800px; /* Wider for sentences */
}

#sentence-modal-body {
    margin-top: 20px;
    max-height: 60vh;
    overflow-y: auto;
    padding-right: 15px; /* For scrollbar */
}

.sentence-entry {
    margin-bottom: 25px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--glass-border);
}
.sentence-entry:last-child {
    border-bottom: none;
}

.sentence-japanese {
    font-size: 1.2em;
    font-family: 'Noto Sans JP', sans-serif;
    margin-bottom: 8px;
    color: var(--text-color-jp);
}
.modal-content h3{
    font-size: 1.5em;
    color: white;
}
.sentence-bangla { /* NEW: Style for Bangla meaning */
    font-size: 1.1em;
    color: var(--text-color);
    margin-top: 5px;
    padding-left: 10px; /* Indent slightly */
}

#sentence-modal-body h2 {
    display: none;;
}
/* New "Examples" button on word cards */
.card-actions {
    gap: 8px; /* Add more space between buttons */
}

.card-action-btn.examples {
    background: rgba(108, 155, 255, 0.2); /* A distinct background */
}

/* --- Dictionary API Result Styling (REMOVED - no longer needed) --- */
/*
#sentence-modal-body h2 { }
.phonetic { }
.meaning-block { }
.meaning-block h4 { }
.definition-entry { }
.definition-entry p { }
.example { }
.full-translation { }
*/

/* --- Study List Selection --- */
.study-list-controls {
    display: flex;
    gap: 15px;
    margin-bottom: 20px;
    align-items: center;

    position: sticky;
    top: var(--nav-height); /* Stick it right below the navbar */
    background: rgba(30, 40, 60, .7); /* Give it a background so content doesn't scroll underneath */
    padding: 15px; /* Add some padding for better spacing */
    z-index: 10; /* Ensure it stays above the word cards */
    margin-left: -15px; /* Counteract the parent's padding */
    margin-right: -15px; /* Counteract the parent's padding */
    border-radius: 0 0 var(--border-radius) var(--border-radius);
    margin-bottom: 15px; /* Adjust margin */
}
.word-card.selected {
    outline: 3px solid var(--secondary-color);
    transform: scale(1.03);
    box-shadow: 0 8px 30px rgba(255, 203, 107, 0.3);
}

.word-card {
    cursor: default; /* Default cursor */
}

/* In selection mode, the cursor changes to a pointer */
.selection-mode .word-card {
    cursor: pointer;
}


.body.study-page-body {
    padding-top: var(--nav-height); /* Ensure content isn't hidden by header */
}

.study-session-grid {
    display: grid;
    grid-template-columns: 3fr 2fr; /* 2/3 for practice, 1/3 for list */
    gap: 25px;
    align-items: flex-start;
}

.flashcard-practice-area {
    position: sticky; /* Makes the flashcard stay in view while scrolling the list */
    top: calc(var(--nav-height) + 20px);
}

.study-word-list-area h3 {
    margin-bottom: 15px;
}

.study-list-container {
    max-height: 70vh;
    overflow-y: auto;
    padding-right: 10px;
}

.study-list-item {
    display: flex;
    justify-content: space-between;
    padding: 12px 15px;
    background: rgba(0,0,0,0.2);
    border-radius: 8px;
    margin-bottom: 10px;
}

.study-list-item .word-bangla {
    font-weight: 500;
    font-size: 1.2em;
    color: var(--text-color-white);
}

.study-list-item .word-japanese {
    font-family: 'Noto Sans JP', sans-serif;
    font-size: 1.2em;
    color: var(--text-color-jp);
}

/* Responsive adjustments for study page */


/* --- Developer Profile Page Styles --- */
.body.developer-page {
    background: var(--bg-color-start); /* Ensure a consistent background */
}

.profile-card {
    max-width: 800px;
    margin: 40px auto;
    padding: 30px 40px; /* More padding for a premium feel */
}

.profile-header {
    display: flex;
    align-items: center;
    gap: 25px;
    border-bottom: 1px solid var(--glass-border);
    padding-bottom: 25px;
    margin-bottom: 25px;
}

.profile-picture {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    border: 3px solid var(--primary-color);
    object-fit: cover; /* Prevents the image from stretching */
    box-shadow: 0 4px 15px rgba(0,0,0,0.4);
}

.profile-title h1 {
    font-size: 2.5em;
    margin-bottom: 5px;
}
.input-select-container{
    display: flex;
    gap: 10px;
    align-items: center;
}
.profile-title h2 {
    font-size: 1.1em;
    color: var(--text-color);
    font-weight: 400;
}

.profile-body h3 {
    font-size: 1.6em;
    color: var(--accent-teal);
    margin-top: 30px;
    margin-bottom: 15px;
    border-bottom: none; /* Remove the underline from the default h3 style */
}

.profile-body p {
    font-size: 1.1em;
    line-height: 1.7;
    color: var(--text-color);
    margin-bottom: 15px;
    text-align: justify;
    
}

.social-links {
    margin-top: 30px;
    text-align: center;
    text-justify: inter-word;
}

.social-button {
    display: inline-block;
    padding: 12px 25px;
    border-radius: var(--border-radius);
    color: white;
    font-weight: 700;
    text-decoration: none;
    transition: all 0.3s ease;
}


.facebook-btn:hover {
    background: transparent;
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(24, 119, 242, 0.3);
}

/* Responsive adjustments for profile card */
@media (max-width: 600px) {
    .profile-header {
        flex-direction: column;
        text-align: center;
    }
}

/* --- Social Button with Icon --- */
.social-button {
    display: inline-flex; /* Use flexbox for easy alignment */
    align-items: center;  /* Vertically center the icon and text */
    gap: 10px;            /* Space between the icon and the text */
    padding: 10px 10px;   /* Adjust padding slightly for a better fit */
}

.social-button svg {
    /* The SVG's color is set to 'currentColor', so it will be white like the text */
    width: 20px;          /* Control the size of the icon */
    height: 20px;
}

/* Wrapper for the sticky controls */
.study-list-controls {
    position: sticky;
    top: var(--nav-height);
    z-index: 10;
    /* This wrapper will get the glass background */
    background: rgba(30, 40, 60, .7);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    margin: -25px -25px 20px -25px; /* Stretch to edges of parent .section-box */
    padding: 15px 25px; /* Re-apply padding */
    border-bottom: 1px solid var(--glass-border);
}
.add-word-form{
    display: flex;
    justify-content: center;
}
.study-list-controls {
    display: flex;
    gap: 15px;
    align-items: center;
}
 #category-select{
        background-color: rgba(0, 0, 0, 0.2);
        color: rgba(255, 255, 255, 0.537);
    }
    #category-select option {
        background-color: rgb(21, 37, 59);
        color: var(--text-color);
    }

@media (max-width: 768px) {
    .study-session-grid {
        grid-template-columns: 1fr; /* Stack on smaller screens */
        gap: 0px;
    }
    .flashcard-practice-area {
        position: static; /* Unstick the flashcard area */
    }
    .study-list-container {
        max-height: none;
        padding: 0px; /* Allow full scroll */
    }
    .study-list-item {
    display: flex;
    justify-content: space-between;
    padding: 10px 10px;
    background: rgba(0,0,0,0.2);
    border-radius: 8px;
    margin-bottom: 10px;
    }

    .study-list-item .word-bangla {
        font-weight: 500;
        font-size: 1.1em;
        color: var(--text-color-white);
    }

    .study-list-item .word-japanese {
        font-family: 'Noto Sans JP', sans-serif;
        font-size: 1.1em;
        color: var(--text-color-jp);
    }
    .container {
    max-width: 1100px;
    margin: 20px auto;
    padding: 0px;
    }
    .random-word-controls{
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 15px;

    }
    .add-button, .control-button{
        font-size: 0.8em;
        padding: 12px 12px;
        margin-left: 0px;
    }
    .nav-tabs {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.4em;
    border: none;
    margin-bottom: 10px;
    }

    .nav-tab {
        font-size: 0.9em;
        padding: 0.5em;
        border: 1px solid var(--glass-border);
        border-radius: var(--border-radius);
    }
    .word-display, .meaning-display {
    font-size: 1.5em;
    font-weight: 500;
    }
    .input-container {
    gap: 5px;
    }
    #add-word-btn{
        padding: 12px 20px;
        font-size: 0.9em;
        border: 1px solid var(--glass-border);
    }
    input, select {
    font-size: 0.9em;
    }
    .hero h1 {
    font-size: 2em;
    }
    .hero h2 {
    font-size: 1.1em;
    }
    .hero p {
        font-size: .8em;
    }
    .hero {
    padding: 50px 5px 0px 0px;
    margin-bottom: 30px;
    }
    .section-box h3{
        padding: 0px 0px 15px 0px;
    }
    #category-select{
        background-color: rgba(0, 0, 0, 0.2);
        color: rgba(255, 255, 255, 0.537);
    }
    #category-select option {
        background-color: rgb(46, 85, 137);
        color: var(--text-color);
    }
    .section-box{
        margin-bottom: 5px;
    }
    #selection-actions{
        gap: 5px;
    }
    #word-list-title{
        font-size: 0.8em;
    }
    .word-list-container, .weak-words-list {
    gap: 5px;
    }
    .section-box h3{
        font-weight: 500;
    }
    .profile-title h1 {
    font-size: 2.5em;
    margin-bottom: 5px;
    }
    .profile-title h2 {
    font-size: 0.8em;
    margin-bottom: 5px;
    font-weight: 500;
    }
    .profile-card{
        padding: 0px 10px;
    }
    .profile-body h3 {
        font-size: 1.2em;
        font-weight: 600;
        padding: 0px 0px 0px 10px;
        margin: 0px 0px 10px 0px;
    }
    .profile-body p {
        padding: 0px 10px;
        font-size: 0.9em;
        line-height: 1.3;
        letter-spacing: 0.5px;
    }
    .profile-picture {
    width: 180px;
    height: 180px;
    }
    .profile-header{
        gap: 10px;
    }
    .modal-content{
        padding: 10px 15px;
    }
    #sentence-modal-body {
    margin-top: 10px;
    max-height: 60vh;
    overflow-y: auto;
    padding-right: 0px;
    }
    .sentence-entry {
    margin-bottom: 15px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--glass-border);
    }
    .sentence-japanese {
        font-size: 1.2em;
        font-family: 'Noto Sans JP', sans-serif;
        margin-bottom: 5px;
        color: var(--text-color-jp);
    }
    .input-group {
         margin-bottom:2px ; 
        }
    .modal-content h3{
        font-size: 1.2em;
        color: rgb(223, 223, 223);
        padding-right: 15px;
    }
    .sentence-bangla { /* NEW: Style for Bangla meaning */
        font-size: 1.1em;
        color: var(--text-color);
        margin-top: 5px;
        padding-left: 10px; /* Indent slightly */
    }
    .modal-close {
    font-size: 25px;
    color: white;
    }
    .bn-jp{
        margin-bottom: 10px;
    }
    .quiz-bangla-word{
        font-size: 1.2em;
    }
    .quiz-option{
        font-size: 1em;
    }
}


/* --- Highlight Searched Word in Examples --- */
.sentence-japanese strong {
    color: var(--secondary-color);
    font-weight: 700;
    background-color: rgba(251, 215, 192, 0.15);
    padding: 0 4px;
    border-radius: 4px;
}

/* --- Study List Item Enhancements --- */
.study-list-item {
    display: flex;
    justify-content: space-between;
    align-items: center; /* Vertically align items */
    padding: 12px 15px;
    background: rgba(0,0,0,0.2);
    border-radius: 8px;
    margin-bottom: 10px;
}

.study-list-item .word-japanese {
    display: block; /* Make Japanese word appear on a new line */
    margin-top: 4px;
    font-family: 'Noto Sans JP', sans-serif;
    color: var(--text-color-jp);
}

.study-list-item .examples {
    /* Make the button visible without hover */
    opacity: 0.8;
    transition: opacity 0.3s;
}

.study-list-item:hover .examples {
    opacity: 1;
}

/* --- Visual Mnemonics Styles (Pexels) --- */
.mnemonic-image-container {
    margin-top: 20px;
    width: 100%;
    max-width: 450px; /* Control max size of the image container */
    height: auto;
    min-height: 100px; /* Reserve some space even when empty */
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px; /* Space between image and credit */
}

.mnemonic-image-container img {
    max-width: 100%;
    max-height: 300px;
    height: auto;
    border-radius: var(--border-radius);
    background-color: rgba(0, 0, 0, 0.2);
    box-shadow: 0 4px 15px var(--glass-shadow);
    object-fit: contain; /* Ensures the whole image is visible */
    transition: transform 0.2s ease-in-out;
}

.mnemonic-image-container a:hover img {
    transform: scale(1.03);
}

.image-loading-text, .image-error-text {
    color: var(--text-color-ash);
    font-style: italic;
}

.image-error-text {
    color: var(--danger-color); /* A soft red for errors */
}

.pexels-credit {
    font-size: 0.75em;
    color: var(--text-color-ash-dark) !important;
    text-decoration: none;
    align-self: flex-end; /* Puts credit on the right */
}

.pexels-credit:hover {
    color: var(--text-color) !important;
}

/* --- Study List Item Actions --- */
.study-list-item {
    display: flex;
    justify-content: space-between;
    align-items: center; /* Vertically align items */
    padding: 12px 15px;
    background: rgba(0,0,0,0.2);
    border-radius: 8px;
    margin-bottom: 10px;
}

.study-item-actions {
    display: flex;
    gap: 8px; /* Space between buttons */
}

/* --- Visual Mnemonics Styles --- */
.mnemonic-image-container {
    margin-bottom: 20px; /* Space between image and the list below */
    width: 100%;
    height: auto;
    display: flex; /* Changed from 'none' to 'flex' by JS */
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 15px;
    background-color: rgba(0,0,0,0.2);
    border-radius: var(--border-radius);
}

.mnemonic-image-container img {
    max-width: 100%;
    max-height: 300px;
    height: auto;
    border-radius: var(--border-radius);
    box-shadow: 0 4px 15px var(--glass-shadow);
    object-fit: contain;
    transition: transform 0.2s ease-in-out;
}

.mnemonic-image-container a:hover img {
    transform: scale(1.03);
}

.image-loading-text, .image-error-text {
    color: var(--text-color-ash);
    font-style: italic;
}

.image-error-text {
    color: var(--danger-color);
}

.pexels-credit {
    font-size: 0.75em;
    color: var(--text-color-ash-dark) !important;
    text-decoration: none;
    align-self: flex-end;
}

.pexels-credit:hover {
    color: var(--text-color) !important;
}

/* Style for the new mnemonic button */
.card-action-btn.mnemonic {
    background: rgba(80, 180, 130, 0.2); /* A distinct green-ish background */
}


/* --- Study List Item Actions --- */
.study-list-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 15px;
    background: rgba(0,0,0,0.2);
    border-radius: 8px;
    margin-bottom: 10px;
}

.study-item-actions {
    display: flex;
    gap: 8px;
}

.card-action-btn.mnemonic {
    background: rgba(80, 180, 130, 0.2);
}

/* --- Mnemonic Modal Styles --- */
.mnemonic-modal-content {
    max-width: 500px;
    text-align: center;
}

#mnemonic-modal-body {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.mnemonic-word-info {
    padding: 10px;
    background-color: rgba(0,0,0,0.2);
    border-radius: var(--border-radius);
}

.mnemonic-bangla {
    font-size: 1.5em;
    font-weight: 700;
    color: var(--text-color-white);
    margin-bottom: 5px;
}

.mnemonic-japanese {
    font-size: 1.8em;
    color: var(--secondary-color);
    font-family: 'Noto Sans JP', sans-serif;
}

.mnemonic-image-link img {
    max-width: 100%;
    max-height: 350px;
    height: auto;
    border-radius: var(--border-radius);
    box-shadow: 0 4px 15px var(--glass-shadow);
    object-fit: contain;
    transition: transform 0.2s ease-in-out;
}

.mnemonic-image-link:hover img {
    transform: scale(1.03);
}

.image-loading-text, .image-error-text {
    color: var(--text-color-ash);
    font-style: italic;
    padding: 20px;
}

.image-error-text {
    color: var(--danger-color);
}

.pexels-credit {
    font-size: 0.75em;
    color: var(--text-color-ash-dark) !important;
    text-decoration: none;
    align-self: flex-end;
}

.pexels-credit:hover {
    color: var(--text-color) !important;
}

/* Highlighted Word Style */
.sentence-japanese strong {
    color: var(--secondary-color);
    font-weight: 700;
    background-color: rgba(251, 215, 192, 0.15);
    padding: 0 4px;
    border-radius: 4px;
}
/* Style for the new mnemonic button on word cards */
.card-action-btn.mnemonic {
    background: rgba(80, 180, 130, 0.2);
}

footer {
    text-align: center;
    padding: 25px;
    background: rgba(0,0,0,0.2);
    color: var(--text-color-ash);
    margin-top: 40px;
    border-top: 1px solid var(--glass-border);
}

.scroll-to-top {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 45px;
    height: 45px;
    background-color: var(--primary-color);
    color: white;
    border-radius: 50%;
    border: none;
    font-size: 24px;
    cursor: pointer;
    display: none; /* Hidden by default */
    align-items: center;
    justify-content: center;
    z-index: 1001; /* Ensure it's above most content */
    box-shadow: 0 2px 10px var(--glass-shadow);
    transition: opacity 0.3s, transform 0.3s;
    opacity: 0;
    transform: translateY(100px); /* Start off-screen */
}

.scroll-to-top.visible {
    display: flex;
    opacity: 1;
    transform: translateY(0); /* Animate into view */
}

.scroll-to-top:hover {
    background-color: var(--button-hover);
    transform: scale(1.1);
}



@media (max-width: 768px) {
    nav {
        flex-wrap: wrap; /* Allow items to wrap */
    }
    .study-logo{
        font-size: 0.9em;
    }

    .nav-links-container {
        display: none; /* Hide nav links by default on mobile */
        width: 100%;
        max-height: 0;
        /*overflow: hidden;*/
        transition: max-height 0.4s ease-in-out;
    }
    
    .nav-links-container.active {
        display: block;
        max-height: 300px; /* Animate open */
    }

    .nav-links {
        flex-direction: column;
        width: 100%;
        padding-top: 10px;
    }

    .nav-links li {
        width: 100%;
        text-align: center;
    }
    
    .nav-links li a {
        display: block;
        padding: 15px;
    }
    
    .dropdown-menu {
        position: static;
        box-shadow: none;
        border: none;
        background: rgba(0,0,0,0.2);
        max-height: 200px;
    }
    .add-word-form{
    display: block;
}
    .nav-menu-button {
        display: block; /* Show hamburger icon on mobile */
    }
    .scroll-to-top {
    position: fixed;
    bottom: 20px;
    right: 10px;
    width: 40px;
    height: 40px;
    background-color: var(--primary-color);
    color: white;
    border-radius: 50%;
    border: none;
    font-size: 20px;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1001;
    box-shadow: 0 2px 10px var(--glass-shadow);
    transition: opacity 0.3s, transform 0.3s;
    opacity: 0;
    transform: translateY(100px);
}
}

.edit-select{
    background-color: rgb(30, 40, 60);
}

/* --- NEW: Enhanced Developer Page Styles --- */

.profile-body h3 {
    font-size: 1.6em;
    color: white; /* Use accent color for headlines */
    margin-top: 40px; /* More space between sections */
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--glass-border);
}

.profile-body ul {
    list-style: none;
    padding-left: 0;
}

.profile-body ul li {
    background: rgba(0,0,0,0.15);
    padding: 12px 15px;
    margin-bottom: 10px;
    border-radius: var(--border-radius);
    border-left: 3px solid var(--primary-color);
}

.tech-stack {
    display: flex;
    flex-wrap: wrap;
    gap: 30px;
    justify-content: center;
    align-items: center;
    margin-top: 20px;
}

.tech-icon {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    font-size: 0.9em;
    color: var(--text-color);
}

.tech-icon img {
    width: 48px;  /* Slightly larger for better visuals */
    height: 48px;
    object-fit: contain; /* Ensures images scale correctly */
    transition: transform 0.3s ease;
}

.tech-icon:hover img {
    transform: scale(1.1);
}


/* Fade-in animation for sections */
.fade-in-section {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in-section.is-visible {
    opacity: 1;
    transform: translateY(0);
}

.tech-icon .github-logo { fill: var(--text-color); } /* Keep GitHub button icon neutral */


/* NEW: Unified Social Button Styles */
.social-links { display: flex; justify-content: center; gap: 20px; flex-wrap: wrap; }
.social-button {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 12px 25px;
    border-radius: var(--border-radius);
    color: var(--text-color-white);
    font-weight: 700;
    text-decoration: none;
    transition: all 0.3s ease;
    border: 1px solid transparent;
}
.social-button svg { width: 24px; height: 24px; fill: currentColor; }

/* Specific styles for each button */
.github-btn { background-color: #333; border-color: #444; }
.github-btn:hover { background-color: #444; transform: translateY(-2px); }

.facebook-btn { background-color: transparent; border-color: #1877F2; }
.facebook-btn:hover { color: #166fe5; transform: translateY(-2px); }


/* Fade-in animation */
.fade-in-section { opacity: 0; transform: translateY(20px); transition: opacity 0.6s ease-out, transform 0.6s ease-out; }
.fade-in-section.is-visible { opacity: 1; transform: translateY(0); }


/* --- Add these new rules to your style.css file --- */

/* Style for the select element itself */
select#voice-select {
    background-color: rgba(0, 0, 0, 0.3); /* Dark background */
    color: var(--text-color); /* Light text color */
    border: 1px solid var(--glass-border);
    padding: 12px 15px;
    border-radius: var(--border-radius);
    font-size: 16px;
}

/* Style for the dropdown options */
select#voice-select option {
    border-radius: var(--border-radius);
    background-color: #1e293b; /* A dark color from your gradient */
    color: var(--text-color);
    padding: 10px; /* Add some padding inside the options for better spacing */
}

/* Optional: Style for when the dropdown is open (supported in some browsers) */
select#voice-select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(28, 61, 125, 0.5);
}

/* --- New Particle Quiz Review Styles --- */

.particle-review-container {
    margin-top: 20px;
    text-align: left;
}

.particle-review-item {
    background: rgba(0, 0, 0, 0.2);
    border-left: 3px solid var(--danger-bg);
    padding: 15px;
    border-radius: var(--border-radius);
    margin-bottom: 15px;
}

.particle-review-item .sentence-japanese {
    font-size: 1.2em;
    color: var(--text-color);
}

.highlight-particle {
    color: var(--accent-teal); /* A bright color for the correct answer */
    background-color: rgba(45, 212, 191, 0.15);
    padding: 2px 6px;
    border-radius: 4px;
    font-weight: bold;
}

.wrong-answer-info {
    margin-top: 10px;
    font-size: 0.9em;
    color: var(--text-color);
    border-top: 1px solid var(--glass-border);
    padding-top: 10px;
}

.wrong-particle {
    text-decoration: line-through;
    color: var(--danger-color); /* Soft red for the wrong answer */
}

.correct-particle {
    color: #5cb85c; /* Soft green for the correct answer */
    font-weight: bold;
}

/* --- Add this to the end of style.css --- */
.update-notification {
    display: none; /* Hidden by default */
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--accent-teal);
    color: var(--text-color-dark);
    padding: 15px 25px;
    border-radius: var(--border-radius);
    box-shadow: 0 4px 15px var(--glass-shadow);
    z-index: 3000;
    font-weight: 700;
    align-items: center;
    gap: 15px;
}

.update-notification.show {
    display: flex; /* Use flex to show it */
}

#reload-button {
    background-color: rgba(0,0,0,0.2);
    color: white;
    border: none;
    padding: 8px 15px;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 700;
}

/* --- New PWA Install Button Styles --- */

.pwa-install-button {
    display: none; /* Hidden by default */
    position: fixed;
    bottom: 85px; /* Position it above the scroll-to-top button */
    right: 20px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 28px; /* Pill shape */
    padding: 12px 20px;
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    z-index: 1002; /* Higher than scroll-to-top */
    box-shadow: 0 4px 12px var(--glass-shadow);
    transition: all 0.3s ease;
    
    /* Flexbox to align icon and text */
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.pwa-install-button:hover {
    transform: scale(1.05);
    background-color: #2e5099;
}

/* We'll use a 'show' class to make it visible with an animation */
.pwa-install-button.show {
    display: inline-flex;
    animation: fadeInAndUp 0.5s ease-out;
}

@keyframes fadeInAndUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Adjust position on mobile to avoid overlap */
@media (max-width: 768px) {
    .pwa-install-button {
        bottom: 75px;
        right: 15px;
    }
}
/* --- Final PWA Install Button with Thin Line Timer --- */

.pwa-install-button {
    display: none; 
    position: fixed;
    bottom: 85px; 
    right: 20px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 28px;
    padding: 12px 20px;
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    z-index: 1002;
    box-shadow: 0 4px 12px var(--glass-shadow);
    transition: all 0.3s ease;
    align-items: center;
    justify-content: center;
    gap: 8px;
    overflow: hidden; /* This is still important */
}

/* The new thin line timer bar */
.pwa-install-button::before {
    content: '';
    position: absolute;
    bottom: 0; /* Position it at the bottom */
    left: 0;
    height: 4px; /* The thickness of the line */
    width: 100%;
    background-color: var(--accent-teal); /* A bright, noticeable color */
    
    /* The animation will be applied when the 'animate-timer' class is added */
    transform: scaleX(1); /* Start at full width */
    transform-origin: left; /* Make it shrink from right to left */
    transition: transform 0.2s; /* A little smoothing */
}

.pwa-install-button:hover {
    transform: scale(1.05);
}

.pwa-install-button.show {
    display: inline-flex;
    animation: fadeInAndUp 0.5s ease-out;
}

/* When the timer should run, we trigger the animation on the pseudo-element */
.pwa-install-button.show.animate-timer::before {
    /* We use 'transform' for better performance than animating 'width' */
    transform: scaleX(0);
    transition: transform 15s linear; /* The animation happens here */
}

/* The fade-in animation for the button itself (no change) */
@keyframes fadeInAndUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive adjustments (no change) */
@media (max-width: 768px) {
    .pwa-install-button {
        bottom: 75px;
        right: 15px;
    }
}
/* Change this rule in style.css */
.pwa-install-button.show.animate-timer::before {
    animation: shrink-timer 15s linear forwards;
}

/* --- New Style for Hiding Particle Quiz Translation --- */

.particle-translation.hidden {
    display: none;
}
/* --- New Styles for the Particle Quiz "Show Meaning" Button --- */

/* Find this existing rule and replace it */
#particle-hint-container {
    text-align: center; /* This is inherited, but good to be explicit */
    min-height: 45px;
    margin: 15px 0;
    /* We don't need flexbox here anymore */
}
/* The button's specific style */
.show-meaning-button {
    background-color: transparent; /* Make it look less like a primary action */
    border: 1px solid var(--glass-border);
    color: #a7c5ff; /* A softer blue color */
    padding: 8px 20px;
    font-size: 14px;
    font-weight: 500;
}

.show-meaning-button:hover {
    background-color: var(--glass-bg); /* Use the glass background on hover */
    color: white;
    border-color: #a7c5ff;
}

.dictionary-filters {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
}

#category-filter {
    width: auto;
    min-width: 180px;
    background-color: rgba(0, 0, 0, 0.2);
    color: rgba(255, 255, 255, 0.632);
}
#category-filter option {
    background-color: #1e293b;
    color: var(--text-color);
}

#search-input {
    width: 100%;
    max-width: 300px;
}

@media (max-width: 768px) {
    .filter-controls {
        flex-direction: column;
        width: 100%;
    }
    #search-input, #category-filter {
        width: 50%;
        padding: 12px 10px;
    }
    #category-filter {
        width: auto;
        min-width: 100px;
        padding: 12px 10px;
    }
    .lan_toggle{
        font-size: 0.9em;
    }
}

/* --- Add these styles to the end of your style.css --- */

.practice-mode-toggle {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 12px;
    margin: 15px 0 5px 0;
    font-size: 0.9em;
    color: var(--text-color);
}

/* The switch - a checkbox wrapper */
.switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 26px;
}

/* Hide default HTML checkbox */
.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

/* The slider track */
.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #334155;
    -webkit-transition: .4s;
    transition: .4s;
    border-radius: 26px;
}

/* The slider knob */
.slider:before {
    position: absolute;
    content: "";
    height: 20px;
    width: 20px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    -webkit-transition: .4s;
    transition: .4s;
    border-radius: 50%;
}

input:checked + .slider {
    background-color: var(--primary-color);
}

input:focus + .slider {
    box-shadow: 0 0 1px var(--primary-color);
}

input:checked + .slider:before {
    -webkit-transform: translateX(24px);
    -ms-transform: translateX(24px);
    transform: translateX(24px);
}

/* --- Add these styles to the end of style.css --- */

.settings-auto-reveal {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
    border-bottom: 1px solid var(--glass-border);
}

.settings-auto-reveal:last-child {
    border-bottom: none;
}

.settings-auto-reveal label {
    font-size: 1.1em;
    color: var(--text-color);
}

.slider-container {
    display: flex;
    align-items: center;
    gap: 15px;
}

.slider-input {
    -webkit-appearance: none;
    appearance: none;
    width: 150px;
    height: 8px;
    background: rgba(0,0,0,0.3);
    outline: none;
    border-radius: 5px;
}

.slider-input::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    background: var(--primary-color);
    cursor: pointer;
    border-radius: 50%;
    border: 2px solid var(--background-image);
}

.slider-input::-moz-range-thumb {
    width: 20px;
    height: 20px;
    background: var(--primary-color);
    cursor: pointer;
    border-radius: 50%;
    border: 2px solid var(--background-image);
}

#auto-reveal-value {
    font-weight: bold;
    color: var(--secondary-color);
    min-width: 30px;
    text-align: right;
}
/* --- Add this to the end of your style.css file --- */

.sub-setting {
    display: flex; /* Changed to flex to align items nicely */
    justify-content: space-between;
    align-items: center;
    padding: 10px 0 10px 25px; /* Indent to show it's a sub-option */
    border-bottom: 1px solid var(--glass-border);
    background-color: rgba(0,0,0,0.1); /* Slightly different background */
}

/* Hide it by default, JS will show it */
.sub-setting {
    display: none;
}

.sub-setting label {
    font-size: 1em; /* Slightly smaller than main settings */
    color: var(--text-color);
}