/* Custom styles */

/* NEW: Theme Variables */
:root {
    --bg-color: #eef2f7;
    --bg-gradient: linear-gradient(to top right, #e0e7ff, #f0f4f8);
    --card-bg-color: rgba(255, 255, 255, 0.85);
    --card-border-color: rgba(255, 255, 255, 0.4);
    --text-color-primary: #1e293b; /* slate-800 */
    --text-color-secondary: #64748b; /* slate-500 */
    --input-bg: #ffffff;
    --input-border: #d1d5db;
    --main-app-bg: white;
    --question-text-color: #1e293b; /* Color for question text */
    --answer-btn-bg: #f3f4f6; /* bg-slate-100 */
    --answer-btn-text: #374151; /* text-gray-700 */
    --answer-btn-hover-bg: #e5e7eb; /* hover:bg-slate-200 */
}

html.dark {
    --bg-color: #0d1a2e;
    --bg-gradient: linear-gradient(to top right, #001f3f, #1e293b);
    --card-bg-color: rgba(30, 41, 59, 0.85); /* slate-800 */
    --card-border-color: rgba(71, 85, 105, 0.4); /* slate-600 */
    --text-color-primary: #f1f5f9; /* slate-100 */
    --text-color-secondary: #94a3b8; /* slate-400 */
    --input-bg: #334155; /* slate-700 */
    --input-border: #475569; /* slate-600 */
    --main-app-bg: #1e293b; /* slate-800 */
    --question-text-color: #f1f5f9; /* Color for question text in dark mode */
    --answer-btn-bg: #334155; /* slate-700 */
    --answer-btn-text: #f1f5f9; /* slate-100 */
    --answer-btn-hover-bg: #475569; /* hover:bg-slate-600 */
}


body {
    font-family: 'Cairo', 'Inter', sans-serif;
    background-color: var(--bg-color);
    background-image: var(--bg-gradient);
    transition: background-color 0.3s ease;
}

#login-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    transition: opacity 0.5s ease;
}

.main-app-container {
    max-width: 800px;
    width: 100%;
    margin: 1rem auto;
    background: var(--main-app-bg);
    border-radius: 1rem;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    min-height: calc(100vh - 2rem);
    position: relative;
    transition: background-color 0.3s ease;
}

main {
    flex-grow: 1;
}

.action-btn {
    transition: all 0.2s ease-in-out;
}

.action-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.main-menu-btn {
    transition: all 0.3s ease-in-out;
    background-size: 200% 100%;
}

.main-menu-btn:hover {
    transform: translateY(-5px) scale(1.02);
    box-shadow: 0 8px 20px rgba(0,0,0,0.15);
    background-position: right center;
}

.main-menu-btn.loading {
    cursor: not-allowed;
    background-image: none;
    background-color: #9ca3af;
}

.loader {
    border: 5px solid #f3f3f3;
    border-top: 5px solid #3498db;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    animation: spin 1s linear infinite;
    margin: 40px auto;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Accordion styles for lectures */
details summary::-webkit-details-marker {
    display: none;
}

details[open] > summary .fa-chevron-down {
    transform: rotate(180deg);
}

.lecture-viewed .view-toggle-icon {
    color: #22c55e; /* Green color for viewed lectures */
}

.lecture-viewed .lecture-name {
    color: #555;
    text-decoration: line-through;
}

.view-toggle-icon {
    cursor: pointer;
    transition: transform 0.2s;
}

.view-toggle-icon:hover {
    transform: scale(1.2);
}

.note-icon.has-note {
    color: #f59e0b; /* Amber color for existing notes */
}

/* Styles from previous MCQ bank */
.answer-btn.correct { background-color: #d1fae5; border-color: #10b981; color: #065f46; }
.answer-btn.incorrect { background-color: #fee2e2; border-color: #ef4444; color: #991b1b; }
.answer-btn.user-choice { border-width: 3px; }
.answer-btn:disabled { opacity: 0.8; cursor: not-allowed; }
.rationale { visibility: hidden; opacity: 0; max-height: 0; transition: all 0.3s ease-in-out; overflow: hidden; }
.rationale.visible { visibility: visible; opacity: 1; max-height: 150px; }
.flag-btn.flagged { color: #f59e0b; }
.bookmark-btn.bookmarked { color: #3b82f6; }
.navigator-btn { position: relative; border: 2px solid transparent; }
.navigator-btn.unanswered { background-color: #e5e7eb; border-color: #d1d5db; }
.navigator-btn.correct { background-color: #d1fae5; border-color: #6ee7b7; }
.navigator-btn.incorrect { background-color: #fee2e2; border-color: #fca5a5; }
.navigator-btn .flag-icon { position: absolute; top: -4px; right: -4px; color: #f59e0b; font-size: 0.75rem; }
.custom-exam-options { max-height: 0; overflow: hidden; transition: max-height 0.5s ease-in-out, padding 0.5s ease-in-out; }
.custom-exam-options.visible { max-height: 500px; padding-top: 1.5rem; padding-bottom: 1.5rem; }
.filter-container { max-height: 150px; overflow-y: auto; border: 1px solid #e5e7eb; padding: 0.75rem; border-radius: 0.5rem; }
.filter-btn.active {
    background-color: #3b82f6;
    color: white;
}

/* Watermark Styles */
#watermark-overlay {
    position: fixed;
    bottom: 10px;
    right: 10px;
    opacity: 0.25;
    pointer-events: none;
    z-index: 1000;
}

#radio-banner-container.open {
    max-height: 320px;
}

/* Learning Mode Styles */
.learning-answer-btn {
    background-color: #f3f4f6;
    border: 1px solid #d1d5db;
}

.learning-answer-btn.correct {
    background-color: #d1fae5;
    border-color: #10b981;
}

.learning-rationale {
    margin-top: 0.5rem;
    padding: 0.75rem;
    border-radius: 0.375rem;
    font-size: 0.875rem;
    color: #065f46;
    background-color: #d1fae5;
}

/* User Card Styles */
#user-card-modal {
    max-width: 400px;
    width: 100%;
}
#user-card-modal h3 { font-size: 1.5rem; }
#user-card-modal img { border-radius: 50%; }
#user-card-modal .flex { display: flex; justify-content: center; align-items: center; }
#avatar-selection-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 0.5rem; }
#avatar-selection-grid img { border-radius: 50%; cursor: pointer; transition: border 0.3s; }
#avatar-selection-grid img:hover { border: 2px solid #3b82f6; }

/* --- NEW: Modern Login Page & Settings Enhancements --- */
#settings-container {
    position: fixed;
    top: 1rem;
    right: 1rem;
    display: flex;
    gap: 0.5rem;
    background-color: var(--card-bg-color);
    padding: 0.5rem;
    border-radius: 9999px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    border: 1px solid var(--card-border-color);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    z-index: 100;
}

/* Mobile view fix for settings container */
@media (max-width: 640px) {
    #settings-container {
        top: auto;
        bottom: 1rem;
        right: 1rem;
        left: auto;
    }
}


#settings-container button {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    color: var(--text-color-secondary);
    background-color: transparent;
    border: none;
    cursor: pointer;
    transition: color 0.2s ease, background-color 0.2s ease;
}

#settings-container button:hover {
    color: var(--text-color-primary);
    background-color: rgba(128, 128, 128, 0.1);
}

/* Corrected icon visibility */
html.light .moon-icon { display: block; }
html.light .sun-icon { display: none; }
html.dark .sun-icon { display: block; }
html.dark .moon-icon { display: none; }

html:not(.animation-off) .animation-off-icon { display: block; }
html:not(.animation-off) .animation-on-icon { display: none; }
html.animation-off .animation-on-icon { display: block; }
html.animation-off .animation-off-icon { display: none; }


.login-card {
    background-color: var(--card-bg-color);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--card-border-color);
    animation: fadeIn 0.5s ease-in-out;
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

.login-card h1 { color: var(--text-color-primary); transition: color 0.3s ease; }
.login-card p { color: var(--text-color-secondary); transition: color 0.3s ease; }
.login-card .input-with-icon { 
    background-color: var(--input-bg);
    border-color: var(--input-border);
    color: var(--text-color-primary);
    transition: background-color 0.3s ease, border-color 0.3s ease, color 0.3s ease;
}
.login-card .input-with-icon::placeholder {
    color: var(--text-color-secondary);
    transition: color 0.3s ease;
}

/* Dark Mode Quiz Question Fix */
#question-text {
    color: var(--question-text-color);
}
.answer-btn {
    background-color: var(--answer-btn-bg);
    color: var(--answer-btn-text);
}
.answer-btn:hover {
    background-color: var(--answer-btn-hover-bg);
}

/* Performance Insights Accordion */
.insights-details {
    border-radius: 0.5rem;
    border: 1px solid #e2e8f0; /* slate-200 */
}
.insights-summary {
    padding: 1rem;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: bold;
    color: #334155; /* slate-700 */
}
.insights-summary::-webkit-details-marker {
    display: none;
}
.insights-summary .fa-chevron-down {
    transition: transform 0.3s ease;
}
.insights-details[open] > .insights-summary .fa-chevron-down {
    transform: rotate(180deg);
}
.insights-content {
    padding: 0 1rem 1rem 1rem;
    border-top: 1px solid #e2e8f0;
}


@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

.input-with-icon-container {
    position: relative;
}

.input-with-icon-container .input-icon {
    position: absolute;
    left: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    color: #9ca3af;
}

.input-with-icon {
    padding-left: 2.5rem;
}

/* Styles for Q-Bank Tabs */
.tab-btn {
    color: #64748b; /* slate-500 */
    border-bottom: 2px solid transparent;
    transition: all 0.2s ease-in-out;
}

.tab-btn:hover {
    color: #334155; /* slate-700 */
    border-bottom-color: #e2e8f0; /* slate-200 */
}

.tab-btn.active {
    color: #4f46e5; /* indigo-600 */
    border-bottom-color: #4f46e5; /* indigo-600 */
    font-weight: 600;
}