@import url('physics2.css');
.subject-badge, .nav-link.active, .btn-primary, .start-btn, .restart-btn, .nav-btn.primary, .question-number { background: linear-gradient(135deg, #4facfe, #00f2fe) !important; }
.nav-subject-title { background: linear-gradient(90deg, #4facfe, #00f2fe) !important; -webkit-background-clip: text !important; background-clip: text !important; }
.hero-content h1 { background: linear-gradient(90deg, #fff, #4facfe) !important; -webkit-background-clip: text !important; background-clip: text !important; }
.hero-background { background: radial-gradient(ellipse at center, rgba(79, 172, 254, 0.15) 0%, transparent 70%) !important; }
.subject-badge { box-shadow: 0 20px 50px rgba(79, 172, 254, 0.4) !important; }
.btn-primary { box-shadow: 0 10px 30px rgba(79, 172, 254, 0.4) !important; }
.hero-stat i, .rule i, .section-title i { color: #4facfe !important; }
.leaderboard-table th { background: rgba(79, 172, 254, 0.2) !important; color: #4facfe !important; }
.message-avatar, .ai-send-btn { background: linear-gradient(135deg, #4facfe, #00f2fe) !important; }
.option-btn:hover, .option-btn.selected { border-color: #4facfe !important; background: rgba(79, 172, 254, 0.1) !important; }
.option-btn.selected .option-letter { background: #4facfe !important; }
.search-box input:focus { border-color: #4facfe !important; }

/* Interactive Summary Styles */
.summary-viewer-modal {
    display: none;
    position: fixed;
    z-index: 2147483647; /* Max Z-Index to cover navbar */
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(10px);
}

.summary-modal-content {
    background: #1a1a2e;
    margin: 5% auto;
    padding: 0;
    border: 1px solid #4facfe;
    width: 90%;
    max-width: 900px;
    border-radius: 20px;
    box-shadow: 0 0 50px rgba(79, 172, 254, 0.3);
    position: relative;
    animation: modalSlideIn 0.4s ease;
}

.summary-header {
    padding: 20px 30px;
    border-bottom: 1px solid rgba(79, 172, 254, 0.3);
    background: linear-gradient(90deg, rgba(79, 172, 254, 0.1), transparent);
    border-radius: 20px 20px 0 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.summary-header h2 {
    margin: 0;
    color: #fff;
    font-size: 1.8rem;
    background: linear-gradient(90deg, #fff, #4facfe);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.summary-body {
    padding: 40px;
    color: #e0e0e0;
    font-size: 1.3rem; /* User requested "a lil bit big" */
    line-height: 2.2;
    text-align: right;
    direction: rtl;
    min-height: 400px;
    max-height: 70vh;
    overflow-y: auto;
}

/* Scrollbar for summary text */
.summary-body::-webkit-scrollbar {
    width: 10px;
}
.summary-body::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.05);
}
.summary-body::-webkit-scrollbar-thumb {
    background: #4facfe;
    border-radius: 5px;
}

/* Interactive Terms */
.interactive-term {
    color: #4facfe;
    border-bottom: 2px dotted #4facfe;
    cursor: pointer;
    font-weight: 700;
    position: relative;
    display: inline-block;
    transition: all 0.3s ease;
    margin: 0 5px;
}

.interactive-term:hover, .interactive-term.active {
    background: rgba(79, 172, 254, 0.15);
    border-radius: 4px;
    padding: 0 5px;
    border-bottom-style: solid;
}

/* Inline Explanation */
.term-expansion {
    display: none;
    background-color: rgba(79, 172, 254, 0.15);
    color: #e0e0e0;
    padding: 2px 8px;
    border-radius: 6px;
    margin: 0 5px;
    border: 1px dashed #4facfe;
    font-size: 0.95em;
    vertical-align: middle;
    line-height: 1.6;
    animation: fadeIn 0.3s ease;
}

.term-expansion.show {
    display: inline-block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-5px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Collapsible Sections */
.section-toggle {
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background 0.3s;
}

.section-toggle:hover {
    background: rgba(79, 172, 254, 0.1);
    border-radius: 8px;
    padding-right: 10px;
}

.section-content {
    display: block;
    animation: slideDown 0.3s ease-out;
}

.section-content.collapsed {
    display: none;
}

.section-toggle i {
    transition: transform 0.3s;
}

.section-toggle.active i {
    transform: rotate(180deg);
}

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

/* Fullscreen Mode */
.summary-modal-content.fullscreen {
    width: 100%;
    height: 100%;
    max-width: none;
    margin: 0;
    border-radius: 0;
    border: none;
    display: flex;
    flex-direction: column;
}

.summary-modal-content.fullscreen .summary-body {
    max-height: none;
    flex: 1;
}

.summary-modal-content.fullscreen .summary-header {
    border-radius: 0;
}

.summary-controls {
    display: flex;
    align-items: center;
    gap: 15px;
    z-index: 10;
}

.zoom-btn {
    background: none;
    border: none;
    color: #aaa;
    font-size: 24px;
    cursor: pointer;
    transition: 0.3s;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.zoom-btn:hover {
    color: #fff;
    transform: scale(1.1);
}

.close-modal {
    position: static; /* Reset absolute since it's in flex container now */
    color: #aaa;
    font-size: 30px;
    font-weight: bold;
    cursor: pointer;
    transition: 0.3s;
    line-height: 1;
}

.close-modal:hover {
    color: #fff;
}

@media (max-width: 768px) {
    .summary-modal-content {
        width: 95%;
        margin: 10% auto;
    }
    .summary-modal-content.fullscreen {
        margin: 0;
        width: 100%;
    }
    .summary-body {
        padding: 20px;
        font-size: 1.1rem;
    }
}