@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');
@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500&display=swap');

body { 
    font-family: 'Inter', sans-serif; 
    background-color: #f8fafc; 
    color: #334155; 
}

/* Custom Scrollbar (Global) */
::-webkit-scrollbar { 
    width: 8px; 
    height: 8px; /* Added height for horizontal scroll */
}
::-webkit-scrollbar-track { 
    background: #f1f5f9; 
}
::-webkit-scrollbar-thumb { 
    background: #cbd5e1; 
    border-radius: 4px; 
}
::-webkit-scrollbar-thumb:hover { 
    background: #94a3b8; 
}

/* Chart Container Styling */
.chart-container {
    position: relative;
    width: 100%;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    height: 300px;
    max-height: 400px;
}
@media (min-width: 768px) {
    .chart-container { height: 350px; }
}

/* Animations */
.fade-in { 
    animation: fadeIn 0.5s ease-out; 
}

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

.card-hover { 
    transition: all 0.3s ease; 
}
.card-hover:hover { 
    transform: translateY(-2px); 
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1); 
}

/* --- CRITICAL FLASHCARD CSS FIXES --- */
.flashcard { 
    perspective: 1000px; 
}

.flashcard-inner { 
    position: relative;
    width: 100%;
    height: 100%;
    text-align: center;
    transition: transform 0.6s; 
    transform-style: preserve-3d; 
}

.flashcard.flipped .flashcard-inner { 
    transform: rotateY(180deg); 
}

.flashcard-front, .flashcard-back { 
    position: absolute;
    width: 100%;
    height: 100%;
    -webkit-backface-visibility: hidden; /* Safari */
    backface-visibility: hidden;
    border-radius: 1rem; /* Matches rounded-2xl */
}

.flashcard-front {
    z-index: 2; /* Force Front to be on top initially */
    background-color: white;
    transform: rotateY(0deg);
}

.flashcard-back { 
    transform: rotateY(180deg); /* Pre-rotate back side */
    z-index: 1;
}

/* --- AI HELPER PAGE STYLES (Merged) --- */

.font-mono { font-family: 'JetBrains Mono', monospace; }

/* Dark Mode Scrollbar for AI Helper Terminals */
.custom-scrollbar::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}
.custom-scrollbar::-webkit-scrollbar-track {
    background: #1e293b;
    border-radius: 4px;
}
.custom-scrollbar::-webkit-scrollbar-thumb {
    background: #475569;
    border-radius: 4px;
}
.custom-scrollbar::-webkit-scrollbar-thumb:hover {
    background: #64748b;
}