body {
    font-family: 'Inter', sans-serif;
    background-color: #0f172a; /* Slate 900 */
}
.section-title {
    border-bottom: 3px solid #3b82f6; /* Blue 500 */
    padding-bottom: 8px;
    display: inline-block;
}
.card {
    background-color: #1e293b; /* Slate 800 */
    border: 1px solid #334155; /* Slate 700 */
    border-radius: 1rem;
    padding: 1.5rem;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}
.highlight-card {
     background: linear-gradient(145deg, #3b82f6, #6366f1); /* Blue to Indigo */
}
.icon-bg {
    background-color: rgba(59, 130, 246, 0.1);
    border-radius: 9999px;
    padding: 0.75rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

/* Flip card styles */
.flip-card {
    background-color: transparent;
    perspective: 1000px;
    height: 200px;
    cursor: pointer;
}

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

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

.flip-card-front, .flip-card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
    border-radius: 1rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 2rem;
}

.flip-card-back {
    transform: rotateY(180deg);
}

.flip-hint {
    position: absolute;
    top: 10px;
    right: 15px;
    font-size: 0.75rem;
    opacity: 0.8;
    color: rgba(255, 255, 255, 0.8);
    z-index: 10;
    background-color: rgba(0, 0, 0, 0.3);
    padding: 2px 6px;
    border-radius: 4px;
}

/* Hover reveal cards for use cases */
.hover-reveal-card {
    height: 160px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.hover-reveal-card .use-case-description {
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.3s ease;
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    padding: 1rem;
    background: rgba(30, 41, 59, 0.95);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
}

.hover-reveal-card:hover .use-case-description {
    opacity: 1;
    transform: translateY(0);
}

.hover-reveal-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(59, 130, 246, 0.3);
}

/* Sidebar Navigation Styles */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    width: 300px;
    background-color: #1e293b;
    border-right: 1px solid #334155;
    overflow-y: auto;
    z-index: 1000;
    transition: transform 0.3s ease;
}

.sidebar.collapsed {
    transform: translateX(-250px);
}

.main-content {
    margin-left: 300px;
    transition: margin-left 0.3s ease;
    opacity: 1;
    animation: fadeIn 0.3s ease-in;
}

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

.main-content.expanded {
    margin-left: 50px;
}

.nav-item {
    display: block;
    padding: 0.75rem 1rem;
    color: #94a3b8;
    text-decoration: none;
    border-left: 3px solid transparent;
    transition: all 0.2s ease;
}

.nav-item:hover {
    background-color: #334155;
    color: #e2e8f0;
    border-left-color: #3b82f6;
}

.nav-item.active {
    background-color: #1e40af;
    color: #ffffff;
    border-left-color: #60a5fa;
    font-weight: 600;
    box-shadow: 0 4px 6px -1px rgba(59, 130, 246, 0.3);
}

.nav-subitem {
    padding-left: 2rem;
    font-size: 0.875rem;
}

.sidebar-toggle {
    position: fixed;
    top: 1rem;
    left: 1rem;
    z-index: 1001;
    background-color: #1e293b;
    border: 1px solid #334155;
    border-radius: 0.5rem;
    padding: 0.5rem;
    color: #94a3b8;
    cursor: pointer;
    transition: all 0.2s ease;
}

.sidebar-toggle:hover {
    background-color: #334155;
    color: #e2e8f0;
}