/* === CSS RESET (Simple) === */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

/* === CSS CUSTOM PROPERTIES (VARIABLES) === */
:root {
    --primary-color: #0779e4; /* Blue */
    --primary-color-dark: #0056b3;
    --secondary-color: #6c757d; /* Grey */
    --secondary-color-dark: #5a6268;
    --success-color: #28a745;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #17a2b8; /* Teal/Info blue */

    --text-color: #333;
    --text-color-light: #555;
    --text-on-primary: #fff;
    --text-on-dark-bg: #fff;

    --bg-color: #f8f9fa; /* Lighter grey for body */
    --surface-bg-color: #fff; /* For cards, forms, main content area */
    --border-color: #dee2e6;
    --input-border-color: #ced4da;

    --font-family-sans: Arial, Helvetica, sans-serif; /* Simplified */
    --font-size-base: 16px;
    --line-height-base: 1.6;

    --header-height: 70px;
    --border-radius: 0.25rem; /* 4px */
    --container-padding: 15px;
}

/* === BASE & TYPOGRAPHY === */
body {
    font-family: var(--font-family-sans);
    font-size: var(--font-size-base);
    line-height: var(--line-height-base);
    color: var(--text-color);
    background-color: var(--bg-color);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
    margin-bottom: 0.75em;
    line-height: 1.2;
    font-weight: 600;
}
h1 { font-size: 2.25rem; } /* 36px */
h2 { font-size: 1.875rem; } /* 30px */
h3 { font-size: 1.5rem; }   /* 24px */

p {
    margin-bottom: 1rem;
}

a {
    color: var(--primary-color);
    text-decoration: none;
}
a:hover {
    color: var(--primary-color-dark);
    text-decoration: underline;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* === LAYOUT === */
.container {
    width: 100%;
    max-width: 1280px; /* Common max-width */
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--container-padding);
    padding-right: var(--container-padding);
}

main.container {
    padding-top: 2rem;
    padding-bottom: 2rem;
    background-color: var(--surface-bg-color);
    min-height: calc(100vh - var(--header-height) - 100px);
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

/* On larger screens, add some top/bottom margin to main content */
@media (min-width: 768px) {
    main.container {
        margin-top: 1.5rem;
        margin-bottom: 1.5rem;
        border-radius: var(--border-radius);
    }
}


/* === HEADER === */
header {
    background: #2c3e50;
    color: var(--text-on-dark-bg);
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

header .main-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-height);
}

header .brand-logo .logo {
    width: 60px;
    margin-right: 10px;

}

header .brand-logo {
    font-size: 1.5rem; /* 24px */
    font-weight: 700;
    color: var(--text-on-dark-bg);
    text-transform: uppercase;
    display: flex;
    align-items: center;
}
header .brand-logo:hover {
    text-decoration: none;
    opacity: 0.9;
}

header .nav-links {
    list-style: none;
    display: flex;
    align-items: center;
}

header .nav-links li {
    margin-left: 1.5rem;
}

header .nav-links a {
    color: var(--text-on-dark-bg);
    text-transform: uppercase;
    font-size: 0.9rem;
    font-weight: 500;
    padding: 0.5rem 0;
    position: relative;
}
header .nav-links a:hover,
header .nav-links a.active {
    color: var(--primary-color);
    text-decoration: none;
}
/* Optional: underline effect on hover/active */
header .nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: width 0.3s ease;
}
header .nav-links a:hover::after,
header .nav-links a.active::after {
    width: 100%;
}


/* Mobile Navigation Toggle */
.nav-toggle {
    display: none; /* Hidden on desktop */
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}
.hamburger {
    display: block;
    width: 25px;
    height: 3px;
    background-color: var(--text-on-dark-bg);
    position: relative;
    transition: background-color 0.3s ease;
}
.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    left: 0;
    width: 25px;
    height: 3px;
    background-color: var(--text-on-dark-bg);
    transition: transform 0.3s ease, top 0.3s ease, bottom 0.3s ease;
}
.hamburger::before { top: -8px; }
.hamburger::after { bottom: -8px; }


.actions-cell a {
    color: #000000 !important;
}



/* Add to css/style.css, within .button-small styles */
.button-small.duplicate { 
    background-color: #9f6cff;
    border-color: #6f42c1;
    color: #000000 !important;
}
.button-small.duplicate:hover { 
    background-color: #5a32a3; 
    border-color: #5a32a3;
}

.button.highlight-action {
    animation: pulse-green 1.5s infinite;
}

@keyframes pulse-green {
    0% {
        box-shadow: 0 0 0 0 rgba(40, 167, 69, 0.7);
    }
    70% {
        box-shadow: 0 0 0 10px rgba(40, 167, 69, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(40, 167, 69, 0);
    }
}


.review-list {
    list-style: none;
    padding: 0;
}
.review-item {
    background-color: #f9f9f9;
    border: 1px solid var(--border-color);
    border-left-width: 5px;
    padding: 1rem;
    margin-bottom: 1rem;
    border-radius: var(--border-radius);
}
.review-item.correct { border-left-color: var(--success-color); }
.review-item.incorrect { border-left-color: var(--danger-color); }
.review-item.not-answered { border-left-color: var(--secondary-color); }

.review-question-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
}
.review-result-indicator {
    font-weight: bold;
    font-size: 0.9em;
}
.review-result-indicator {
    padding: 3px 8px;
    border-radius: 10px;
    color: white;
}
.review-item.correct .review-result-indicator { background-color: var(--success-color); }
.review-item.incorrect .review-result-indicator { background-color: var(--danger-color); }
.review-item.not-answered .review-result-indicator { background-color: var(--secondary-color); }

.review-question-text {
    font-weight: 500;
    margin-bottom: 1rem;
}
.review-answers p {
    margin-bottom: 0.5rem;
    background: #fff;
    padding: 0.5rem;
    border-radius: var(--border-radius);
}
.review-answers .correct-answer-text {
    color: #0f5132;
    background-color: #d1e7dd; /* Light green background */
}

.dashboard-container .actions {
    margin-bottom: 15px;
}
.dashboard-container h3 {
    margin: 0px;
}

/* Mobile Navigation Styles (when active) */
@media (max-width: 768px) {
    header .nav-links {
        display: none; /* Hide by default on mobile */
        flex-direction: column;
        position: absolute;
        top: var(--header-height);
        left: 0;
        width: 100%;
        background-color: #34495e;
        padding: 1rem 0;
        box-shadow: 0 2px 4px rgba(0,0,0,0.1);
        z-index: 999;
    }
    header .nav-links.nav-active { /* JS will add this class */
        display: flex;
    }
    header .nav-links li {
        margin: 0;
        width: 100%;
        text-align: center;
    }
    header .nav-links a {
        display: block;
        padding: 1rem;
        width: 100%;
        border-bottom: 1px solid rgba(255,255,255,0.1);
    }
    header .nav-links li:last-child a {
        border-bottom: none;
    }
    .nav-toggle {
        display: block; /* Show hamburger on mobile */
    }
    /* Hamburger animation when nav is active */
    .nav-toggle[aria-expanded="true"] .hamburger {
        background-color: transparent;
    }
    .nav-toggle[aria-expanded="true"] .hamburger::before {
        transform: rotate(45deg);
        top: 0;
    }
    .nav-toggle[aria-expanded="true"] .hamburger::after {
        transform: rotate(-45deg);
        bottom: 0;
    }
}


/* === FOOTER === */
footer {
    background: #2c3e50;
    color: var(--text-on-dark-bg);
    text-align: center;
    padding: 1.5rem var(--container-padding);
    margin-top: 2rem;
    font-size: 0.9rem;
}

.student-footer {
    background: #333;
}

    .main-footer .footer-content {
        display: flex;
        flex-direction: column-reverse;
        justify-content: center;
        align-items: center;
        padding: 1rem 0;
    }

    .main-footer .footer-content p {
        display: flex;
        align-items: center;
        margin: 0;
    }
    
    .main-footer .footer-content .social {
        display: flex;
        justify-content: center;
        margin: 0;
        margin-bottom: 10px;
    }
    .main-footer .footer-content .social a {
        margin-right: 5px;
        margin-left: 5px;
    }
    .main-footer .footer-content .footer-nav {
        margin-bottom: 10px;
    }

.footer-nav {
    text-align: center;
}

.footer-nav a {
    margin: 0px 5px;
    text-decoration: none;
    color: #ffffff;
}
.footer-nav a:hover {
    color: var(--primary-color, #007bff);
}

@media (min-width: 600px) {
    .main-footer .footer-content {
        display: flex;
        flex-direction: column-reverse;
        justify-content: center;
        align-items: center;
        padding: 1rem 0;
    }

    .main-footer .footer-content p {
        display: flex;
        align-items: center;
        margin: 0;
    }
    
    .main-footer .footer-content .social {
        display: flex;
        justify-content: center;
        margin: 0;
        margin-bottom: 10px;
    }
    .main-footer .footer-content .social a {
        margin-right: 5px;
        margin-left: 5px;
    }
    .main-footer .footer-content .footer-nav {
        margin-bottom: 10px;
    }

}


/* === FORMS === */
.form-container {
    background: var(--surface-bg-color);
    padding: 15px;
    border-radius: var(--border-radius);
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
    max-width: 800px;
    margin: 2rem auto;
}
.form-container h2 {
    text-align: center;
    margin-bottom: 1.5rem;
    color: var(--primary-color);
}
.form-group {
    margin-bottom: 1rem;
}
.form-group > label {
    display: flex;
    margin-bottom: 0.5rem;
    font-weight: 500;
}
.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="password"],
.form-group input[type="number"],
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--input-border-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
    line-height: var(--line-height-base);
    transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    border-color: var(--primary-color);
    outline: 0;
    box-shadow: 0 0 0 0.2rem rgba(var(--primary-color), 0.25);
}
.form-group textarea {
    resize: vertical;
    min-height: 80px;
}


.mcq-row {
    display: flex;
    align-items: center;
    gap: 12px;
    width: 100%;
}

.mcq-row input[type="text"] {
    flex: 1;
    min-width: 0;
}

.radio_div {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-shrink: 0;
}


.radio_div input[type="radio"] {
    flex-shrink: 0;
}

.form-group-checkbox {
    display: flex;
    align-items: flex-start;
    margin-bottom: 20px;
}
.form-group-checkbox input[type="checkbox"] {
    margin-top: 4px;
    margin-right: 10px;
}
.form-group-checkbox label {
    font-size: 14px;
    color: #555;
}



/* === BUTTONS === */
.button, button {
    display: inline-block;
    font-weight: 500;
    text-align: center;
    vertical-align: middle;
    cursor: pointer;
    user-select: none;
    background-color: var(--primary-color);
    border: 1px solid var(--primary-color);
    color: var(--text-on-primary);
    padding: 0.75rem 1.25rem; /* 12px 20px */
    font-size: 1rem;
    line-height: var(--line-height-base);
    border-radius: var(--border-radius);
    transition: color 0.15s ease-in-out, background-color 0.15s ease-in-out, border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
    text-decoration: none; /* Remove underline from <a> styled as button */
}
.button:hover {
    background-color: var(--primary-color-dark);
    border-color: var(--primary-color-dark);
    color: var(--text-on-primary);
    text-decoration: none;
}
.button:focus {
    outline: 0;
    box-shadow: 0 0 0 0.2rem rgba(var(--primary-color), 0.5);
}
.button:disabled, .button.disabled {
    background-color: #ccc;
    border-color: #ccc;
    color: #666;
    cursor: not-allowed;
    opacity: 0.65;
}

.button.secondary {
    background-color: var(--secondary-color);
    border-color: var(--secondary-color);
}
.button.secondary:hover {
    background-color: var(--secondary-color-dark);
    border-color: var(--secondary-color-dark);
}

.button.large {
    padding: 0.875rem 1.5rem;
    font-size: 1.125rem;
}

.button-small {
    padding: 0.375rem 0.75rem;
    font-size: 0.875rem;
    margin-right: 0.3rem;
    margin-bottom: 0.3rem;
    display: inline-block;
    text-transform: none;
}
.button-small.edit { background-color: var(--warning-color); border-color: var(--warning-color); color: var(--text-color); }
.button-small.edit:hover { background-color: #e0a800; border-color: #e0a800;}
.button-small.delete { background-color: var(--danger-color); border-color: var(--danger-color); }
.button-small.delete:hover { background-color: #c82333; border-color: #bd2130;}
.button-small.start { background-color: var(--success-color); border-color: var(--success-color); }
.button-small.start:hover { background-color: #1e7e34; border-color: #1c7430;}
.button-small.view { background-color: var(--info-color); border-color: var(--info-color); }
.button-small.view:hover { background-color: #117a8b; border-color: #10707f;}
.button-small.export { background-color: var(--success-color); border-color: var(--success-color); } /* Same as start or choose other */


/* === MESSAGES & ALERTS === */
.message {
    padding: 1rem;
    margin-bottom: 1rem;
    border: 1px solid transparent;
    border-radius: var(--border-radius);
    text-align: center;
}
.message.success {
    color: #0f5132;
    background-color: #d1e7dd;
    border-color: #badbcc;
}
.message.error {
    color: #842029;
    background-color: #f8d7da;
    border-color: #f5c2c7;
}
.message.error ul { /* For lists of errors */
    list-style-position: inside;
    text-align: left;
    margin-top: 0.5rem;
}
.error-text { /* For inline field errors */
    color: var(--danger-color);
    font-size: 0.875em;
    display: block;
    margin-top: 0.25rem;
}
.form-error { /* General form errors */
    margin-top: 0.5rem;
}

/* === TABLES (for teacher dashboards mostly) === */
.table-responsive-wrapper { /* Wrap tables in this for horizontal scroll on mobile */
    overflow-x: auto;
    margin-bottom: 1rem;
}
.data-table { /* Generic class for main data tables */
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
    background-color: var(--surface-bg-color);
}
.data-table th, .data-table td {
    border: 1px solid var(--border-color);
    padding: 0.75rem;
    text-align: left;
    vertical-align: middle;
}
.data-table thead th {
    background-color: #e9ecef;
    font-weight: 600;
    white-space: nowrap;
}
.data-table tbody tr:nth-child(even) {
    background-color: #f8f9fa;
}
.data-table tbody tr:hover {
    background-color: #e2e6ea;
}


.question-list #no-questions-message {
    display: flex;
    align-items: center;
}

.question-list #no-questions-message p {
    margin: 0px;
    padding: 0px;
    padding: 10px 10px;
    box-sizing: border-box;
}

.options-ordering .option-draggable {
    padding: 12px;
    margin-bottom: 8px;
    background-color: #f7f7f7;
    border: 1px solid #ddd;
    border-radius: 4px;
    cursor: grab;
    user-select: none; /* Prevents text selection while dragging */
}
.options-ordering .option-draggable:active {
    cursor: grabbing;
}
.sortable-ghost {
    opacity: 0.4;
    background: #c8ebfb;
}
.instruction-text {
    font-style: italic;
    color: #666;
    margin-bottom: 15px;
}


/* Student Play Quiz Page */
.play-quiz-container { max-width: 700px; margin: 1rem auto; padding: 1.5rem; }
.question-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1rem; border-bottom: 1px solid var(--border-color); padding-bottom: 0.75rem; }
.timer-display { font-size: 1.1rem; font-weight: bold; color: var(--danger-color); }
.question-text { font-size: 1.25rem; margin-bottom: 1.25rem; }
.options-mcq .option {
    margin-bottom: 0.75rem;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    cursor: pointer;
    display: flex;
    align-items: center;
    transition: background 0.2s;
}

.options-mcq .option.selected {
    background-color: #d0ebff;
    border-color: #339af0;
}

.options-mcq .option:hover { background-color: #f0f0f0; }
.options-mcq .option input[type="radio"] { margin-right: 0.75rem; flex-shrink: 0; transform: scale(1.2); }
.option-open-ended label { font-weight: 500; }
.option-open-ended input[type="text"] {
    width: 100%;
    padding: 10px 14px;
    font-size: 16px;
    border: 1px solid #ccc;
    border-radius: 6px;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.option-open-ended input[type="text"]:focus {
    border-color: #339af0;
    box-shadow: 0 0 4px rgba(51, 154, 240, 0.4);
}


#submit_answer_btn { margin-top: 1.5rem; width: 100%; padding: 0.875rem; font-size: 1.05rem; }

.loader { border: 5px solid #f3f3f3; border-top: 5px solid var(--primary-color); border-radius: 50%; width: 30px; height: 30px; animation: spin 1s linear infinite; margin: 1rem auto; }
@keyframes spin { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); } }


/* === SESSION DASHBOARD & RESULTS (Teacher & Student) === */
.session-dashboard-container .join-code-display { font-size: 1.8rem; padding: 1.25rem; background-color: #e7f3fe; border: 1px solid #c2e0ff; text-align: center; margin-bottom: 1.5rem; border-radius: var(--border-radius); }
.session-dashboard-container .join-code-display strong { color: var(--primary-color-dark); letter-spacing: 1px; }
.session-dashboard-container .participant-count,
.session-dashboard-container .session-status { font-size: 1.1rem; margin-bottom: 0.75rem; }

.leaderboard-container, .quiz-finished-container, .waiting-room-container {
    max-width: 600px; margin: 1rem auto; padding: 1.5rem;
}


/* Utility: Text Align */
.text-center { text-align: center; }

/* === RESPONSIVE ADJUSTMENTS FOR SMALLER SCREENS === */
@media (max-width: 768px) {
    .container {
        padding-left: 10px;
        padding-right: 10px;
    }
    h1 { font-size: 1.8rem; }
    h2 { font-size: 1.5rem; }
    h3 { font-size: 1.25rem; }

    .form-container {
        padding: 1rem;
        margin: 10px auto;
    }
    .play-quiz-container, .leaderboard-container, .quiz-finished-container, .waiting-room-container {
        padding: 1rem;
        margin: 0.5rem auto;
    }

    .button-small { /* Make small buttons slightly larger on mobile for easier tapping */
        padding: 0.5rem 0.8rem; 
    }

    
    .button.large {
        font-size: 1.125rem;
        margin-bottom: 10px;
    }
    
}
@media (max-width: 480px) {
    .mcq-option-group { flex-direction: column; align-items: flex-start; }
    .mcq-option-group input[type="text"] { margin-bottom: 0.5rem; margin-right: 0; }
}


@media (max-width: 390px) {
    .page-actions-container .button {
        margin-bottom: 10px;
    }
}



/* =================================================================== */
/* Styles for the "Your Account" Page
/* =================================================================== */

/* 1. The main container card */
.account-details-box {
    background-color: #ffffff;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    padding: 30px;
    max-width: 700px; /* Prevents it from being too wide on large screens */
    margin: 2rem auto;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

/* 2. Each line of information (e.g., Name, Email) */
.account-details-box p {
    display: flex;
    align-items: center;
    font-size: 16px;
    margin-bottom: 1rem;
    padding: 8px 0;
    border-bottom: 1px solid #f0f0f0;
}

.account-details-box p:last-child {
    margin-bottom: 0; /* Removes extra space after the last item */
    border-bottom: none; /* Removes the line under the last item */
}

/* 3. The labels (the bold text) */
.account-details-box p strong {
    min-width: 200px; /* Ensures all values line up vertically */
    color: #555;
    font-weight: 600;
    margin-right: 15px;
}

/* 4. The plan name badge (for consistency with your dashboard) */
.account-details-box .plan-name {
    font-weight: bold;
    padding: 4px 10px;
    border-radius: 5px;
    color: #fff;
    font-size: 14px;
}

/* Colors for specific plans */
.account-details-box .plan-name.premium {
    background-color: #28a745; /* A nice green for Premium */
}

.account-details-box .plan-name.premium_plus {
    background-color: #6f42c1; /* A nice purple for Premium+ */
}

/* 5. The horizontal separator line */
.account-details-box hr {
    border: 0;
    border-top: 1px solid #e0e0e0;
    margin: 25px 0;
}

/* Style for the small Edit button */
.edit-name-btn {
    background-color: #007bff;
    color: white;
    border: none;
    border-radius: 4px;
    padding: 2px 8px;
    font-size: 12px;
    cursor: pointer;
    transition: background 0.2s;
    height: 24px; /* Fix height for alignment */
    line-height: 1; /* Center text vertically */
}

.edit-name-btn:hover {
    background-color: #0056b3;
}



/* image preview remove image button */
.button-danger {
    background-color: #dc3545;
    border-color: #dc3545;
    color: white;
}
.button-danger:hover {
    background-color: #c82333;
    border-color: #bd2130;
}

.upgrade-message {
    background: #f5f7ff;
    border: 1px solid #d5dcff;
    padding: 10px 14px !important;
    border-radius: 10px;
    font-size: 15px;
    color: #2b3a67;
    margin-top: 10px;
    box-sizing: border-box;
}

.upgrade-message .upgrade-link {
    background: #4361ee;
    color: #fff;
    text-decoration: none;
    font-weight: 600;
    padding: 5px 10px;
    border-radius: 6px;
    transition: background 0.2s ease;
}

.upgrade-message .upgrade-link:hover {
    background: #2745c4;
}


.highlight {
    color: #e74c3c;
    font-weight: bold;
}


.simple-notice.ai-notice {
    padding: 15px; background-color: #e9e7ff; border: 1px solid #c8c2f5;
    border-radius: 8px; text-align: center; font-weight: 500; color: #4a4a6e;
}
.simple-notice.ai-notice p { margin: 0; }

/* 6. Responsive adjustments for small screens (mobile) */
@media (max-width: 600px) {
    .account-details-box {
        padding: 20px;
    }

    .account-details-box p {
        flex-direction: column; /* Stack label on top of the value */
        align-items: flex-start;
        border-bottom: none;
        padding-bottom: 1rem;
    }

    .account-details-box p strong {
        min-width: auto; /* Reset the fixed width */
        margin-bottom: 5px;
    }
}